FR2701086A1 - Assembly and connection collar, and method avoiding their misuse. - Google Patents

Abstract

The invention relates to a connection assembly. It relates to an assembly which comprises a first and a second element, a first device for fixing the first ends of the first and the second connecting element, and a second device for fixing the second end of the first connecting element to the second. end of the second connecting element. This second device comprises an eyebolt (174), a latch (162) having a longitudinal slot (182), a nut which can be screwed onto the threaded end (190) of the bolt, and a device (184) for prevent securing of the second end of the second connecting member to the outside of the latch. Application to clamps.

Description

The present invention relates generally to

  collars which can contract circumferentially

  More specifically, the invention relates to circular clamping collars having bolt and nut assemblies which are clamped around the flanged ends of two tubes or conduits so that they are connected. More specifically, the present invention relates to a rigid V-shaped fastener connection assembly which is used for example on the air intake ducts of aircraft engines. However, it should be noted that the coupling according to the invention and described in FIG. the present

  memory, can also be used for the fixation of

  ductwork on pneumatic drive assemblies or

  for mounting accessories such as fuel pumps

  generators, starters and flow control devices, as well as in external applications

of the aerospace industry.

  Necklaces that can contract circumferentially

  These clamps can be used for mounting a flexible tube on an end cap, for positioning and clamping a closure member on a conduit, for clamping. conduit ends aligned tightly, or in applications

  These collars which contract

  a strip or strap intended to surround the object or objects to be clamped, or the strip may be formed of several interconnected segments. The ends of the strip have an operating member capable of pulling the ends towards each other. Such an actuating member is often in the form of a bolt and nut device. In a collapsible collar having a bolt and nut actuator, the bolt is usually hingedly mounted at a first end of the strand. that a nut is selectively mounted on the bolt and bears against the other end of the

  When the nut is tightened on the bolt, the ends

  necklace are brought together and reduce the circumference

  the collar by ensuring the desired shrinkage of the collar. So that the collar does not fail in case of breakage of the bolt, some collars that can contract include security means that

  hold the collar around the elements to be connected.

  The security means comprise a connecting rod articulated on

  the leg carrying the bolt and which is intended to pass

  above the corresponding lug when the collar is tightened by the bolt In case of breakage of the associated bolt, the connecting rod retains the two lugs and holds the collar around the parts to be connected, sufficiently for these

  parts that are connected do not separate completely.

  The connecting rod may have a U-shape, its base having a hole through which the free end of the articulated bolt passes during use. Each of the arms of the connecting rod has a

  longitudinal slot so that a spindle arranged transversely

  the arrangement with which the connecting rod is fixed can pass into the slot of the connecting rod, the arrangement being such that the connecting rod can not separate from the leg when it has been fixed in place. Such collars which can contract, called rigid connections to organ

  retained in V, are already known in the art.

  One of the problems posed by these clusters

  In the case of the V-shaped retainer couplings, it has been possible for the assembly to be incorrectly installed. Such an erroneous installation is shown in FIG. 4 of the drawings of this specification. slide the safety latch relative to the eyelet bolt tab on the collar allowing the trunnion tab to

  an erroneous position on the outside of the safety lock.

  Then the automatic locking nut can be fixed in

  place on the threaded part of the bolt and it appears super-

  ficially that the lock has been properly mounted.

  However, the lug of the trunnion is free to separate from the nut and to deviate from the bolt under the action of vibration forces and the like applied during the flight of an aircraft Obviously, this separation can cause leaks in the the level of the connections of the two ducts that were to be connected and may cause a catastrophic failure of the duct assembly itself. When such an assembly is used in an aircraft reactor in the form of an intake duct, this failure can also cause a shutdown of the reactor with the consequences

  catastrophic events that may result.

  It has therefore been considered desirable to develop a new assembly forming an improved connector which does not have the above or other disadvantages while providing better overall results.

very advantageous.

  The invention thus relates to a connection assembly

of this type.

  More precisely, the invention implements a

  first connecting element having a first end

  Means and a second end, and a second connecting member having a first end and a second end First means are for fixing the first end of the first connecting member to the first end of the second connecting member Second means are for attaching the second end of the first connecting member to the second end of the second connecting member The second means comprises a latch mounted so that it can pivot and slide on the second end of the first coupling member and a grommet bolt mounted articulated way on the second end of the first element A nut can be screwed selectively onto the threaded end

  The means are intended to prevent an installation

  erroneous statement of the second end of the second element of the

connection to the lock.

  A first embodiment of the means for preventing an incorrect installation comprises a slit portion of reduced width, placed on the latch. This slit portion of reduced width prevents the latch from sliding sufficiently relative to the second end of the latch.

  first coupling element to allow an installation

  Another embodiment of the means for preventing erroneous installation includes a

  reducing the length of the slot placed on the lock.

  In another embodiment of the present invention, the means for preventing an erroneous installation comprises a tab directed inwardly of a wall of the lock near a slot placed on the lock. Another embodiment of the means for to prevent incorrect installation includes a cleat protruding inwardly from a wall surface of the latch The cleat prevents movement of the second end of the first coupling element in a manner sufficient relative to the second end of the second element coupling to allow incorrect installation.

  Another embodiment of the present invention

  is a new and improved necklace that can be

contract circumferentially.

  More specifically, in this aspect of the invention, the collar comprises a band intended to surround the object to

  tighten The band has a first and a second end.

  A pivot pin is mounted so that it can pivot on the first end and an eyelet bolt is mounted so that it can pivot on the spindle A latch is mounted on the spindle so that it can slide and pivot A nut can selectively screwed onto the threaded end of the bolt Means are intended to prevent incorrect installation of the second end

of the band with respect to the lock.

  A first embodiment of the means for preventing false installation comprises a reduced width slit portion formed on the latch. This reduced width portion prevents sliding of the latch relative to the spindle by an amount sufficient to

  the installation can be wrong Another way of

  the means for preventing incorrect installation includes a slot of reduced length placed on

the lock.

  In another embodiment, the means for preventing false installation includes a cleat protruding inside a wall of the latch close to

  of a slot formed on the latch Another embodiment of

  the means for preventing incorrect installation includes a cleat protruding into a

  latch wall surface Cleat prevents movement

  the bolt is sufficient in relation to the first end

  the tape to allow for incorrect installation.

  In another embodiment, the invention relates to a method for preventing an installation

  erroneous collar that can contract circumferentially

tially.

  More specifically, according to this method, a circumferentially collapsible collar includes a band for surrounding the object to be clamped, the band having first and second ends. A pivot pin is hingedly mounted on the first end of the band. and an eyelet bolt is hingedly mounted on the spindle A latch is mounted on the spindle so that it can slide and pivot A nut can be selectively screwed onto the threaded end of the bolt A sliding movement of the latch relative to the spindle is limited and the length of the bolt is adjusted so that it prevents incorrect installation of the second

  end of the band with respect to the lock.

  An advantage of the present invention is the realization

  a new and improved necklace that can

a circumferential contraction.

  Another advantage of the invention is the production of an improved connection assembly enabling the

  fastening two ducts with flanges to one another.

  Another advantage of the invention is the production of a V-shaped retainer connection assembly comprising means for preventing incorrect installation of a first end of a first connection element with respect to a safety lock. fixed to a

  adjacent end of a second connecting member.

  Another advantage of the present invention is the realization of a rigid connection assembly with a V-shaped retainer in which a reduced width slot portion is formed on a safety lock. This portion of reduced width, in cooperation with a bolt of adequate length, prevents slipping of the latch in a manner sufficient, relative to the tab to which the latch is attached, so that the installation can be erroneous In another embodiment, a slot of reduced length is formed on the latch In another embodiment, a cleat protrudes within a

lock branch.

  Another additional advantage of the invention is the provision of a method for preventing incorrect installation of a V-shaped retainer connection assembly.

  Other features and advantages of the invention

  tion will emerge more clearly from the following description

  Embodiments of the invention, with reference to the accompanying drawings, in which: Figure 1 is a side elevational view of a conventional rigid V-retainer connection assembly; FIG. 2 is an exploded perspective view, on a reduced scale, of a joint made with another embodiment of a conventional rigid connection assembly with a V-shaped retainer; Figure 3 is a greatly enlarged section of a joint, similar to that of Figure 2, in the assembled state; FIG. 4A is an enlarged perspective view of a locking portion of a conventional rigid V-shaped fastener connection assembly, corresponding to the assemblies of FIGS. 1 and 2, in which a tab of a trunnion is attached. erroneously outside a lock; Figure 4B is a greatly enlarged section through a vertical plane of the end of a bolt lug of the rigid V-retainer connection assembly of Figure 4A; Fig. 5 is a perspective view showing a first embodiment of means for preventing incorrect installation of a trunnion lug with respect to a latch according to the present invention; Fig. 6 is a perspective view showing a second embodiment of the means for preventing incorrect installation of a trunnion lug with respect to a latch according to the present invention;

  FIG. 7 is a perspective view of a third

  second embodiment of the means for preventing incorrect installation of a trunnion lug with respect to a lock according to the invention; and Figure 8 is a side elevational view of a

  used as a means of preventing an installation

  erroneously inserting a trunnion tab relative to the latch in a fourth embodiment of the invention.

  Reference is now made to the drawings which represent

  illustrate, some embodiments

  of the invention FIG. 1 represents a conventional assembly

  A rigid V-connection with a V-shaped retainer is shown in FIG. 2, and another conventional V-connection rigid connection assembly B is used for securing two flange-connected conduits. essentially intended for a flanged joint formed on an aircraft reactor air intake duct and is described with reference to this application, it should be noted that the connection assembly

  can also be used in a variety of aerospace conditions

  In addition, although the invention is described in its application to a rigid connection assembly with a V-shaped retaining element, it is necessary to note that it is necessary to fix two tubular elements to one another. it can also be used with flexible connection sets, in the form of collars

or bands.

  Reference is now made to Figure 1; a conventional rigid V-retainer connection assembly A comprises a first retainer half 10 having a first end 12 terminating at a first end lug 14 and a second end 16 terminating at a second end tab 18 One second

  half of the retaining member also has a first end

  mité 22 on which is placed a first end tab 24 and a second end 26 on which is placed a second end lug or trunnion tab 28. Referring now to Figure 2; the halves and retaining member each have a substantially V-shaped cross section and comprise a V-shaped channel 30 delimited by two side walls connected by a base. The half 10 is used for fixing a first flange 32 of a first leads 34 to a second flange 36 of a second duct 38 so that a seal 40

be tight between the two flanges.

  Referring now to Figure 1;

  first means 50 in the form of an articulated connecting rod

  are intended to fix the first end tab 14 of the first retainer half to the first end tab 24 of the second retainer half. The link rod may comprise a first rivet 52 which fixed a first end of several metal plates 54 (only one is visible in Figure 1) to the first leg 14 and a second rivet 56 which fixes the other end of the metal plates 54 to the second leg 24 Second fixing means 60 second ends 18, 28 of the first and second half of the retaining member to each other are placed at the other end of the connection assembly. The second means are shown in the form of a classic set to

security lock.

  Although Figure 1 represents only one

  safety lock assembly for securing the ends

  1 of the V-shaped retaining member A, FIG. 2 shows a V-shaped rigid connector B which has two conventional security lock assemblies. In the embodiment of FIG. two safety lock assemblies of connector B must both be tightened for fastening connector B around adjacent flanges 32 and 36 It should also be noted that a rigid union connector may be used

  V-shaped restraint having more than two sections, as

  FIGS. 1 and 2 In other words, it is conceivable to use a flexible or rigid coupling with a V-shaped retaining member consisting of at least three sections which are articulated on each other with the exception of

  at one end o is placed a safety lock assembly

  when that provision is considered necessary

  in particular conditions.

  Reference is now made to Figure 4A; the conventional safety lock assembly comprises a latch or saddle 62 having a first leg 64, a second leg 66 and a base wall 68 which connects them. A saddle block or trunnion spacer 70 is attached, for example by fixing means 72 in the latch 62 near its base wall 68. An eye bolt 74 is hingedly attached to the second end flange of the first half or bolt lug 18 so that a first end 76 of the eyelet bolt is attached between two

  branches of the leg by a pin 78 disposed transver-

  badly through both legs of the leg 18 A

  Washer 80 is placed at each end of pin 78.

  The spacer washer is used to secure the latch 62 to the pin 78 while permitting sliding and rotation. Each end of the pin 78 passes through a respective one of two slots 82, 83 which are arranged along the length of the respective first and second spindles 64, 66 of the latch 62 The washers 80 allow the latch 62 to be fastened to the lug 18 by allowing the sliding and

the rotation.

  Reference is now made to Figure 4B; the spindle 78 comprises a first section 84 of relatively large diameter, passing through respective aligned openings of the first end 76 of the bolt and the pair of branches of the lug 18. The spindle 78 also has, on each side, a second section 85 of smaller diameter that passes into a respective slot among the slots 82, 83 placed in the two branches 64 and 66 of the latch 62 Finally, the spindle has, at each end, a third section 86 of even smaller diameter, passing through a opening formed in the middle of each washer 80 It is obvious that a larger diameter section is placed at each end of the pin to retain the washers 80 in the position In other words, the pin is riveted at its ends and it has a larger diameter in the middle than riveted ends The sections of different diameters are necessary to ensure the possibility of sliding of the lock 62, that is to say e pins 64 and 66, relative to the pin 78, while the pin allows

  the pivoting movement of the bolt 74.

  The bolt 74 eyelet further comprises a rod 87 passing through an opening of suitable size (no

  visible) of the washer 70 of the journal and in an opening

  The bolt 74 terminates in a second end 88 which is threaded as indicated by the reference A nut 92, for example a self-locking nut, can be selectively attached to the housing. threaded end 90 of the

bolt 74.

  Such conventional security locks were originally made to prevent separation of the connector and seals when the coupling eye bolt failed. However, if the connector is incorrectly mounted, the tab 28 is the outside of the latch 62, the integrity of the joint of the conduits is threatened in case of breakage of the bolt If the fitting is installed in a wrong way, it is possible that the eyelet bolt 74 and the nut 92 jump outside the paw 28 under the action of vibration This can cause a complete separation of the seal, with possible disastrous consequences. An incorrect installation can occur when the installer does not place the latch 62 on the tab 28 so that this tab is in the lock and near the washer 70 On the contrary, if the bolt 74 is long enough and the lock 62 can slide sufficiently far from it, it is possible to place the tab 28 outside the latch 62, so that the bolt 74 passes between the legs of the tab 28 Then the nut 92 can be screwed into position on the threaded end 90 so that the tab 28 bears on the outside of the lock 62

  may seem to an inexperienced installer that the connection

  has been properly implemented, but this facility

  lation can have disastrous consequences when the assembly undergoes vibrations and the bolt 74 jumps

  the space between the legs of the leg 28.

  According to the invention, means are provided for preventing an incorrect installation of the trunnion lug with respect to the bolt and bolt of a rigid or flexible V-retaining member connection assembly. The figure represents a first embodiment of the invention. such means. In FIG. 5, the means comprise a latch 162 which has a first branch 164, a second branch 166 and a base wall 168 which connects the two branches. A trunnion washer is secured in the latch near the end wall 168. by fixing means 172 A bolt 174 with eyelet is pivotally attached to a first end tab 118 by a pin 178 passing through

  through the first end 176 of the bolt 174 eyelet.

  A washer 180 is placed near each end of the spindle 178. One of the washers is disposed on a first longitudinal slot 182 formed in the branch 164. This slot 182 has a first width and communicates with a second longitudinal slot 184 having a second wider width. A stem 186 of the bolt 174 passes through an aperture of a suitable size (not visible) formed in the washer 170 and a suitably sized opening 187 formed in the base wall 168. A second end 188 of the bolt 174 results in a portion of the bolt 174.

threaded 190.

  In this embodiment, an incorrect installation of the tab 128 with respect to the security lock 162 is prevented since the latch 162 can not slide very far from the threaded end 190. The latch 162 can only slide along the length of the latch. slot 182 of relatively large width The subsequent sliding of the lock relative to the tab 118 is prevented since the diameter of the slot 184 of small width is too small

  to allow spindle 178 to enter slot 184.

  This feature, coupled with the predetermined length of the bolt 174, prevents any possibility of mounting a nut (not shown in Figure 5, but identical to the nut 92 of Figure 4) on the threaded end 190 of the bolt 174 , in the event of an attempt to arrange the journal lug 128 outside the latch 162, the legs of the lug 128 protruding around the second end

188 of the bolt 174.

  We continue to refer to Figure 5; it should be noted that the slot 184 of small width is necessary to prevent the necessary sliding of the tab 128 relative to the latch when the connection assembly with V retaining member is clamped around a flange seal for this purpose, the lug 128 has a protuberance 192 which protrudes slightly outwards and which is housed in the slot 184 of smaller width The slot 184 cooperates with the protuberances 192 so that they hold in place the lug of the trunnion in the latch 162 This operation ensures the maintenance of the lugs 118 and 128 in the assembled position before tightening the connection assembly around a flanged joint. In addition, the slot 184 cooperates with the protuberances 192 so that they allow a guided and even sliding movement. of the tab 128 with respect to the lock 162 when the nut is tightened on

  the threaded end 190 of the bolt 174.

  It should be noted that, in order for the wrong installation of the trunnion lug to be impossible, it is important that the length of the bolt is limited to only

  exceeding P necessary for the fixing of a nut

  on the threaded end of the bolt 174 when the lug 128 is suitably positioned in the latch 162 If the length of the bolt 174 increases sufficiently, the excess length P would be sufficient for a nut to be secured to the threaded end 190 of the bolt, even in case of misplacement of the tab 128, despite the limited amplitude of sliding of the lock 162 Consequently, the cooperation of the displacement

  limit of the lock 162 and the set length P of exceeding

  The bolt 174 is necessary for the means to prevent incorrect installation of the trunnion tab relative to the bolt and bolt to function properly. Referring now to Fig. 6, there is shown another embodiment of the means for preventing incorrect installation of the end having the trunnion tab of a connecting member with respect to the bolt and bolt. appreciation and

  understanding of this embodiment of the

  tion, similar elements are designated by reference

  identical numerical references followed by the suffix ', and the new elements are designated by new numerical references. In this embodiment, a latch 200 comprises a first leg 202 and a second leg 204 which are connected by a base wall 206 A first longitudinal slot 208 is placed on the first leg 202 and a second longitudinal collinear slot 210 is placed at distance of the first slot from which it is separated by a wall section 212 A similar construction is preferably made on the other wall 204 of the latch 200. As a result, the latch 200 is slidable relative to the eyelet bolt 118 'only of the length allowed by the first slot 208 When the length of the eyelet bolt 174 'is appropriately selected according to the allowable range of movement of the lock by the length of the first slot 208, the length

  Threaded mating 190 'of the bolt 174' can not protrude excessively beyond the end wall 206 of the latch when a trunnion lug 128 'is erroneously mounted outside the latch to the point where a nut can be attached to the threaded end 190 'of the bolt 174' This

  prevents incorrect attachment of the trunnion lug.

  Reference is now made to Figure 7; another embodiment of the means for preventing incorrect installation of the end having the trunnion lug of a connecting element according to the invention is also shown. For the convenience of the appreciation and understanding of this method of analogous elements are identified by identical numerical references followed by the sign ", and the new elements are identified by new references

digital.

  In this embodiment of the invention, a latch 220 includes a first leg 222 and a second leg 224 and a base wall 226. A slot 228 having a single width is formed in each leg 222 and 224. inwardly of the first wall 222 near the slot 228 The first stopper is shown near an upper edge of the slot 228 The stopper prevents the lock 220 from sliding sufficiently

  away from the lug 118 "of the bolt to allow for a

  erroneously insert a 128 "trunnion lug around a threaded end 190" of the bolt 174 ", when the length

  bolt 174 "is suitably chosen.

  It should be noted in Figure 7 that two such cleats 230 are each shown extending inside one of the branches 222, 224 to the other cleat The cleats have dimensions such that they prevent a sliding movement of the The latch region having the tabs beyond a pin 178 "of the eyebolt FIG. 7 further indicates that, if desired, a second set of tabs 232 may be placed near the lower edge of the slots 228. dimensions such that they cooperate with two upper cleats 230 by preventing the sliding movement of the latch 220 by

  relative to pin 178 beyond a predetermined point.

  Obviously, four relatively small tabs 230, 232 or

  two relatively large cleats 230 can be used.

  Referring now to FIG. 8, there is shown another embodiment of the means for preventing erroneous installation of a trunnion tab end of a connecting member, with respect to a

security lock.

  In this embodiment of the invention, a latch 240 comprises a first leg 242, a second leg, which is not visible in FIG. 8, and a base wall 244. A slot 246 having a single width is placed next the length of the branch 242 A member 248 forming a cleat protrudes radially inwardly

  from the lower edge of branch 242 to the adjoining branch

  This cleat member is in contact with the tab of the end of the bolt of the connection assembly so that the latch 240 can not move sufficiently relative to the end of the bolt to allow incorrect installation of the tab. outside the bolt and around the bolt, assuming that the length of the bolt is suitably adjusted in contrast to the embodiments shown in Figures 5, 6 and 7, in which the movement of the latch is stopped by contact pin 178, 178 ', 178 "of the eyelet bolt with means on the lock, in the embodiment of Figure 8, the stroke of the lock is limited

  by the support of the cleat 248 on the leg of the bolt itself.

  It should be noted that a cleat that protrudes inwards in a similar way can be placed on the other branch of the

lock 240.

  In place of the tabs shown in FIGS.

  and 8, the use of protuberances facing the

  The two arms of the latch (not shown) are formed on both latch legs to engage the bolt end lugs of the connection assembly and prevent unwanted latch movement, and may also be desirable. fixing, for example by welding or in a similar manner, separate or similar cleats to the branches of the lock to prevent

  undesired displacement of the lock relative to the end

  bolt of the connection set.

  It is understood that the invention has been described and shown only as a preferred example and that any technical equivalence can be provided in its

  constituent elements without departing from its scope.

Claims (19)

  1 connection assembly, characterized in that it comprises: a first connecting element (10) having a first end (12) and a second end (16), a second connecting element (20) having a first end (22); ) and a second end (26), first means (50) for fixing the first end (12) of the first connection element (10) to the first end (22) of the second connection element (20), and second means (60) for securing the second end (16) of the first connecting member (10) to the second end (26) of the second connecting member (20), the second means comprising: a grommet (174) hingedly mounted on a pin (178) at the second end (16) of the first connecting member (10), a latch (162) mounted at the second end (16) of the first connecting member (10) so that it can pivot and slide, the latch (162) having a longitudinal slot (182) through which one end of the pin (178) passes, a nut selectively screwable to the threaded end of the eyelet bolt (174), and means for preventing fixing the second end (26) of the second connecting element (20) outside the lock.   2 An assembly according to claim 1, characterized in that said means for preventing the attachment comprise a portion (184) of reduced width of the slot (182) placed on the latch (162), said slot portion of reduced width preventing the sliding the latch (162) far enough away from the eyelet bolt (174) so that the second end (26) of the second connecting member (20) can be attached to the outside of the latch (162).   3 assembly according to claim 1, characterized in   the means to prevent fixation include   A slit (208) of reduced length is provided on said latch (200) to this slit (208) of reduced length preventing slidability of the latch (162) far enough from the eyelet bolt (174 ') to allow the latch end (26) of said second connecting member   (20) to be attached to the outside of the latch (200).   4 assembly according to claim 1, characterized in that the latch (220) has a U-shaped, and said means for preventing the attachment comprise a first cleat (230) directed from the inside of a wall (222) of the latch (220) to the opposite wall, the latch (230) preventing movement of the latch (220) far enough, relative to the bolt (174 "), to allow the second end (26) of the second connecting member (20) )   to be fixed outside the lock (220).   An assembly according to claim 4, characterized in   what the means intended to prevent the fixation   further carry a second cleat (230) protruding inwardly from the opposite wall of the latch (220) to the first cleat (230).   Assembly according to claim 1, characterized in that the first fixing means comprise a connecting rod (50).   Assembly according to claim 1, characterized in that the first fixing means comprise: a latch (162) fixed to the second end (16) of the first connecting element (10) so that it can pivot and slide, a eyelet bolt (174) fixed to rotate at the second end (16) of the first connecting member (10), a nut which can be selectively screwed onto a threaded end (190) of the eyelet bolt (174) , and means for preventing erroneous installation of the second end (26) of the second connecting member (20) with respect to the bolt (162) and the bolt with eyelet (174).   8 Rigid connection set with body   V-shaped retainer, intended to present a circular contraction   and to fix two conduits having flanges, characterized in that it comprises: a first connecting element (10) having a substantially V-shaped section, a first end (12) having a first lug (14) and a second end (16) having a second leg (18), a second connecting member (20) having a substantially V-shaped cross-section, a first end (22) comprising a first leg (24) and a second end (26) comprising a second leg (28), first means (50) for attaching the first leg (14) of the first connecting member (10) to the first leg (24) of the second connecting member (20), and second means (60) attaching the second leg (18) of the first connecting member (10) to the second leg (28) of the second connecting member (20), and the second means comprising: a pivoting eye bolt (174)   on the second leg (18) of the first connecting element   a pin (178) pivoting, the eyelet bolt (174) passing through an opening (187) of the base (168) of the latch (162), a U-bolt (162) having a first and a second leg (164, 166) spaced apart and a base wall (168) connected to the legs, each of the legs having a longitudinal slot (184), the respective ends of the pivot pin (178) passing through a respective slot so that the latch (162) is attached to the second leg (18) of the first connecting member (10) while being slidable and pivotable, a nut which can be selectively screwed onto the threaded end (190) of the eyelet bolt (174). ), and means for preventing attachment of the second leg (28) of the second connecting member (20) to the outside of the lock (162).   An assembly according to claim 8, characterized in that said means for preventing attachment comprises a portion (184) of reduced width of the slot (182) on at least one leg (164) of the latch (162), the slit portion of reduced width cooperating with a set length of the eyelet bolt (174) so that the latch (162) can not slide far enough, relative to the pin (178) forming the pivot of the eyelet bolt ( 174), to allow attachment of the second leg (28) of the second connecting member (20) to the outside of the lock (162).   An assembly according to claim 8, characterized in that said means for preventing fixation comprises a slot of reduced length (208) placed on at least one leg (202) of the latch (200), said slot of reduced length cooperating with a a set length of the eyelet bolt (174 ') to prevent the bolt (200) from sliding far enough relative to the pin (178') forming the pivot of the eyelet bolt (174 '), to allow the attachment of the second paw (28) of the second   connecting element (20) outside the latch (200).   11 An assembly according to claim 8, characterized in that said means for preventing the attachment comprise a first latch (230) projecting inwardly from one limb (222) of the latch (220) to the other limb (224). ), the first leg (222) cooperating with a set length of the eyelet bolt (174 ") so that the latch (220) can not slide far enough, relative to the pin (178") pivoting the bolt to eyelet (174 "), to allow fixation of the second leg (28) of the second element of   connection (20) to the outside of the lock (220).   An assembly according to claim 11, characterized in that said means for preventing attachment further comprises a second latch (230) protruding inwardly from the other leg (224) of the latch to the first leg (222), the second latch (230) cooperating with the set length of the eyelet bolt (174 ") so that the latch (220) can not move sufficiently far from the second leg (18) of the first connecting member (10); ) to allow the second leg (28) of the second connecting member (20)   to be fixed outside the lock (220).   Assembly according to Claim 8, characterized in that the first fixing means comprise a articulated connecting rod.   Retaining member according to claim 8, characterized in that the first fixing means comprise: a latch (162) fixed to the second lug (18) of the first connecting element (10) so that it can pivot and slide an eyelet bolt (174) attached to the second leg (18) of the first connecting member (10) so as to be pivotable, a nut which can be selectively screwed onto a threaded end (190) of the eyelet bolt (174), and means for preventing erroneous installation of the second end (28) of the second connecting member (20) with respect to the latch (162) and the bolt with eyelet (174).   Necklace that can contract circumferentially-   characterized in that it comprises: a strip intended to surround the object to be clamped, a first and a second end formed on the strip,   a pivot pin (178) mounted on the first   first end so that it can pivot, an eyelet bolt (174) mounted on the spindle (178) so that it can pivot, a latch (162) mounted on the spindle (178) so that it can pivot and sliding, a nut which can be selectively screwed onto the threaded end of the eyelet bolt (174), and means for preventing attachment of the second end of the band to the outside of the latch (162).   The collar of claim 15, characterized in that the latch (162) has a longitudinal slot (184), and the means for preventing the attachment comprise a slit portion (182) of reduced width, that slit portion of width reduced movement of the lock (162) far enough away from the pivot pin (178) so that the second end of the band can be attached to the outside of the latch (162).   17 A collar according to claim 15, characterized in that the latch (200) has a longitudinal slot and the means for preventing the attachment comprise a bridge (212) interrupting the slot, the bridge (212) preventing the sliding of the lock (200). ) sufficiently far away from the pivot pin (178 ') so that the second end of the strip can be attached to the outside of the lock (200).   Collar according to claim 15, characterized in that the latch (220) has a U-shape and the means for preventing the attachment comprise a cleat (230) projecting inwardly from one wall of the latch to an opposite wall thereof, the cleat (230) being located near a slot disposed on the latch (220), the latch (230) preventing the lock (220) from sliding sufficiently far from the pivot pin (178 ") for allow the second end of the tape to be attached to the outside of the lock (220).   The collar of claim 15, characterized in that the latch (220) is U-shaped, and the means for preventing attachment include a latch (230) projecting inwardly from a lock leg (222). (220) to an opposite leg (224) of the latch (220), the latch (230) preventing movement of the latch (220) far enough from the first end of the belt to allow the second end of the latch gang   to be fixed outside the lock (220).   Method for preventing an installation   erroneous collar that can contract circumferentially   characterized in that it comprises: producing a band for surrounding an object to be clamped, the band having a first and a second end, a pin (178) pivot mounted on the first end so that it to pivot, an eyelet bolt (174) mounted on the spindle (178) to pivot, and a latch (162) mounted on the spindle (178) to slide and pivot, a nut selectively sliding on the threaded end (190) of the eyelet bolt (174), limiting the sliding movement of the latch (162) relative to the pivot pin (178), and   the prohibition of the fixing of the second   the band outside the lock (162).   A method according to claim 20, characterized in that it further comprises the prohibition of the screwing of the nut on the threaded end (190) of the eyelet bolt (174) when the second end of the strip is placed at the outside of the lock (162).   Process according to claim 20, characterized   in that the prohibition step includes the sec-   adjusting the length of the eyelet bolt (174).