EP0983443A1 - Device for fixing an element to a thin support - Google Patents

Device for fixing an element to a thin support

Info

Publication number
EP0983443A1
EP0983443A1 EP98925751A EP98925751A EP0983443A1 EP 0983443 A1 EP0983443 A1 EP 0983443A1 EP 98925751 A EP98925751 A EP 98925751A EP 98925751 A EP98925751 A EP 98925751A EP 0983443 A1 EP0983443 A1 EP 0983443A1
Authority
EP
European Patent Office
Prior art keywords
support
hooking
attachment
blocking part
rear end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98925751A
Other languages
German (de)
French (fr)
Inventor
Armand Lagorgette
Jean-Claude Masson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Original Assignee
Renault SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP0983443A1 publication Critical patent/EP0983443A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B19/08—Hollow rivets; Multi-part rivets
    • F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically
    • F16B19/1027—Multi-part rivets
    • F16B19/1036—Blind rivets
    • F16B19/1081—Blind rivets fastened by a drive-pin

Definitions

  • the present invention relates to a device for fixing an element to a thin support, comprising a hooking part which can be engaged from the front in a hole in the support and a blocking part which, by driving into the part d 'hanging, ensures the expansion of the latter and its attachment to the support.
  • the blocking part which is pressed into the hooking part for the expansion of the latter cannot be withdrawn towards the rear for disassembly, the only possibility of disassembly consisting in driving this blocking part forward.
  • the blocking part driven through the hooking part generally falls into a hollow body d '' where it can often not be removed and in which it therefore generates noises.
  • the attachment part generally undergoes permanent deformation during its expansion and is therefore degraded following disassembly.
  • the present invention relates to a blind fastening device which, while being of simple structure, allows easy disassembly with recovery of all parts of the device, without any degradation.
  • the blocking part comprises an external thread and the hooking part has internally means for taken to cooperate with the threading of the blocking part in order to ensure, after being inserted into the hooking part, with a view to the expansion of the latter, the axial immobilization of the blocking part in the part of expanded attachment while allowing the unscrewing of the blocking part for disassembly of the device.
  • the attachment portion comprises at least two opposite attachment branches connected to each other at a first end and carrying each internally said gripping means in the vicinity of their second end.
  • Said gripping means can advantageously be constituted by thread sections.
  • at least the thread of one of the parts is a thread with a sawtooth profile.
  • Each hooking branch may advantageously comprise an elastic loop shaped so as to undergo, when the locking part is pressed into the hooking part engaged in the hole of the support, elastic bending with axial crushing and radial expansion of the loop in front of the support.
  • Each loop can advantageously be extended towards the free end of the attachment branch by a spout having internally said gripping means and externally a profiling improving the attachment in the hole of the support.
  • the blocking part may include at its rear end an imprint for the engagement of a unscrewing tool, preferably a transverse slot for the blade of a screwdriver.
  • the first ends of the attachment branches are connected to each other by an annular connection portion and the blocking part comprises at its rear end means for its axial immobilization in said annular connection portion.
  • Said axial immobilization means may preferably comprise latching means allowing the engagement and axial immobilization of the rear end of the locking part in said connecting portion of the latching branches before mounting.
  • said latching means can advantageously be constituted by external projections on the two opposite sector-shaped portions that said transverse slot delimits at the rear end of the blocking part .
  • an element 1 is intended to be fixed to a flat support 2, for example made of sheet metal, having a hole 3 at the place of fixing.
  • the fixing is carried out using a device 4 which consists of a hooking part 5 made in one piece with the element 1, and a separate blocking part 6.
  • the attachment portion 5 essentially comprises two opposite attachment branches 7, connected to one another at one of their ends by an annular connection portion 8, the latter being in turn connected to the element 1 by a portion of tubular junction 9.
  • the connecting portion 8 has an inner diameter smaller than the inner diameter of the joining portion 9, so that a shoulder 10 remains at the point of connection of the connecting portion 8 with the joining portion 9, a shoulder whose function will appear later.
  • the hooking branches 7 each comprise a loop 1 1, one end of which is connected to the connecting portion 8 and the other end of which is extended by a hooking spout 12.
  • the hooking spout 12 of each branch 7 comprises internally, that is to say on the side facing the opposite branch 7, gripping means 13 constituted for example by several teeth or thread sections staggered in the direction of the length of the spout 12.
  • gripping means 13 constituted for example by several teeth or thread sections staggered in the direction of the length of the spout 12.
  • the spout 12 has a groove 14 extending transversely to its length and flanked on the side facing the free end of the spout 12 by a boss 15 and on the side facing the loop 11 by a boss 16 which can possibly assume a function of sealing.
  • the locking part 6 has the general shape of a screw, comprising a point 17 in a truncated cone followed by a barrel 18 provided with a thread 19 with a sawtooth profile.
  • the locking part 6 comprises a collar 20 having a frustoconical front flank 21 and a rear flank 22 perpendicular to the axis of the part 6.
  • the collar 20 is followed towards the rear end of the part 6, by a cylindrical section 23 whose reduced diameter is substantially equal to the diameter of the bore of the annular connection portion 8, and whose length corresponds to the length of said bore.
  • the blocking part 6 ends in a frustoconical section 24.
  • the locking part 6 has, in its rear end zone, a diametrical transverse slot 25 extending over a depth sufficient to divide the rear end zone into two sectors having a certain elasticity in bending.
  • Each of said sectors carries, on the frustoconical portion 24, a projection 26 preferably located in an angular position offset by 90 ° relative to the plane of the slot 25.
  • the protrusions 26 thus constitute latching means by which the locking part 6 can, after pressing its rear end into the connecting portion 8, be immobilized axially relative to the latter, therefore relative to the element 1 to to stare.
  • the assembly is presented in the position according to FIG. 1, by engaging the end of the spouts 12 in the hole 3. It then suffices to push the element 1 against the support 2, for example by a pressure exerted with the palm of the hand on the element 1 in the area of the junction portion 9, to push the locking part 6 between the spouts 12 of the two branches 7.
  • This simultaneously causes a bending of the loops 1 1 in the direction of crushing the loops 11, and an outward bending of the spouts 12, including a spacing of the spouts 12 behind the support 2 (expansion of the attachment portion 5), ensuring the attachment of the spouts 12 to the hole 3 of the support 2.
  • the insertion of the blocking part 6 into the attachment part 5 can continue until the loops 11 are completely flattened, as shown in FIG. 2 , thread 19 of the blocking part 6 clinging in this position to the teeth 13 of the spouts 12, so that the element 1 is held firmly in the position shown in FIG. 2.
  • the fixing device according to FIG. 3 differs from the device according to FIGS. 1 and 2 only in that the attachment part 5 is produced separately from the element 1 to be fixed, instead of being made in one piece. with the latter.
  • the junction portion 9 which extends the annular connection portion 8 of the branches 7 is therefore not integral with the element 1, but has at its free end an outer rim 27 which can be hung behind an inner rim 28 of the element 1 to fix. Where appropriate, by an appropriate conformation of the rim 27 and / or the rim 28, it is possible to establish a connection in rotation between these two parts.
  • the element 1 to be fixed comprises, along the axis of the blocking part 6, a hole 29 allowing the engagement of a screwdriver to unscrew, for the purpose of dismantling the device, the locking part 6 provided with a transverse slot 25 at its rear end.
  • the device according to FIG. 3 operates in the same way as the device according to FIGS. 1 and 2.
  • the attachment portion 5 is molded in one piece from plastic, for example polyamide.
  • the molding of the hooking part 5 can be considerably simplified by the fact that the two hooking branches 7 are molded flat and are brought only to the mounting in the position according to FIGS. 1 and 3, position in which the two nozzles 12 are brought together for insertion into the hole 3 of the support 2, by bending the loops 11 of the branches 7.
  • the axial immobilization of the blocking part 6 relative to the connecting portion 8 of the arms 7 of the hooking part 5 could also to be done for means other than the collar 20 and the projections 26, which allow such immobilization by snap-fastening, before mounting, so that mounting can then be done by a simple pressure exerted on the element 1 to be fixed. It would be possible, for example, to remove the collar 20, and to provide an outer rim at the rear end of the blocking part 6. In this case, the blocking part 6 should be engaged by its point 17, through the connecting portion 8, until its outer edge comes to bear against said connecting portion.

Abstract

The invention concerns a device for fixing an element (1) to a thin support (2), comprising a catching part (5) capable of being engaged from the front in a hole (3) of the support and a locking part (6) which, by being driven into the catching part, ensures the expansion of the latter and its being fixed to the support. The locking part (6) comprises an external thread (19) and the catching part (5) has internally gripping means (13) co-operating with the locking part thread, to ensure the immobilisation of the locking part after it has been driven into the expanded catching part while allowing the locking part to be unscrewed for disassembling. The invention is useful for fixing elements on sheet metal supports, such as door panels in motor vehicles.

Description

Dispositif de fixation d'un élément à un support mince. Device for fixing an element to a thin support.
La présente invention se rapporte à un dispositif de fixation d'un élément à un support mince, comprenant une partie d'accrochage pouvant être engagée depuis l'avant dans un trou du support et une partie de blocage qui, par enfoncement dans la partie d'accrochage, assure l'expansion de cette dernière et sa fixation au support.The present invention relates to a device for fixing an element to a thin support, comprising a hooking part which can be engaged from the front in a hole in the support and a blocking part which, by driving into the part d 'hanging, ensures the expansion of the latter and its attachment to the support.
Sur les dispositifs connus de fixation en aveugle de ce type, la partie de blocage qui est enfoncée dans la partie d'accrochage pour l'expansion de cette dernière ne peut pas être retirée vers l'arrière en vue du démontage, la seule possibilité de démontage consistant à chasser cette partie de blocage vers l'avant. Dans le cas où le dispositif est utilisé en construction automobile pour la fixation d'une pièce sur une tôle, par exemple d'un panneau de porte, la partie de blocage chassée à travers la partie d'accrochage tombe généralement dans un corps creux d'où il peut souvent ne pas être retiré et dans lequel il engendre donc des bruits. De plus, la partie d'accrochage subit généralement une déformation permanente lors de son expansion et se trouve donc dégradée à la suite du démontage.On known blind fastening devices of this type, the blocking part which is pressed into the hooking part for the expansion of the latter cannot be withdrawn towards the rear for disassembly, the only possibility of disassembly consisting in driving this blocking part forward. In the case where the device is used in automobile construction for fixing a part on a sheet, for example of a door panel, the blocking part driven through the hooking part generally falls into a hollow body d '' where it can often not be removed and in which it therefore generates noises. In addition, the attachment part generally undergoes permanent deformation during its expansion and is therefore degraded following disassembly.
La présente invention vise un dispositif de fixation en aveugle qui, tout en étant de structure simple, permet un démontage aisé avec récupération de toutes les parties du dispositif, sans aucune dégradation.The present invention relates to a blind fastening device which, while being of simple structure, allows easy disassembly with recovery of all parts of the device, without any degradation.
Sur le dispositif conforme à l'invention de fixation d'un élément à un support mince, comprenant une partie d'accrochage et une partie de blocage, la partie de blocage comporte un filetage extérieur et la partie d'accrochage présente intérieurement des moyens de prise pour coopérer avec le filetage de la partie de blocage afin d'assurer, après son enfoncement dans la partie d'accrochage, en vue de l'expansion de cette dernière, l'immobilisation axiale de la partie de blocage dans la partie d'accrochage expansée tout en permettant le dévissage de la partie de blocage en vue du démontage du dispositif.On the device according to the invention for fixing an element to a thin support, comprising a hooking part and a blocking part, the blocking part comprises an external thread and the hooking part has internally means for taken to cooperate with the threading of the blocking part in order to ensure, after being inserted into the hooking part, with a view to the expansion of the latter, the axial immobilization of the blocking part in the part of expanded attachment while allowing the unscrewing of the blocking part for disassembly of the device.
De préférence, pour simplifier la fabrication du dispositif, la partie d'accrochage comprend au moins deux branches d'accrochage opposées reliées entre elles à une première extrémité et portant chacune intérieurement lesdits moyens de prise au voisinage de leur seconde extrémité.Preferably, to simplify the manufacture of the device, the attachment portion comprises at least two opposite attachment branches connected to each other at a first end and carrying each internally said gripping means in the vicinity of their second end.
Lesdits moyens de prise peuvent être avantageusement constitués par des tronçons de filetage. De préférence, au moins le filetage de l'une des parties est un filetage à profil en dents de scie.Said gripping means can advantageously be constituted by thread sections. Preferably, at least the thread of one of the parts is a thread with a sawtooth profile.
Chaque branche d'accrochage peut avantageusement comprendre une boucle élastique conformée de manière à subir, lors de l'enfoncement de la partie de blocage dans la partie d'accrochage engagée dans le trou du support, une flexion élastique avec écrasement axial et expansion radiale de la boucle en avant du support.Each hooking branch may advantageously comprise an elastic loop shaped so as to undergo, when the locking part is pressed into the hooking part engaged in the hole of the support, elastic bending with axial crushing and radial expansion of the loop in front of the support.
Chaque boucle peut avantageusement être prolongée vers l'extrémité libre de la branche d'accrochage par un bec présentant intérieurement lesdits moyens de prise et extérieurement un profilage améliorant l'accrochage dans le trou du support.Each loop can advantageously be extended towards the free end of the attachment branch by a spout having internally said gripping means and externally a profiling improving the attachment in the hole of the support.
La partie de blocage peut comporter à son extrémité arrière une empreinte pour l'engagement d'un outil de dévissage, de préférence une fente transversale pour la lame d'un tournevis.The blocking part may include at its rear end an imprint for the engagement of a unscrewing tool, preferably a transverse slot for the blade of a screwdriver.
De préférence, les premières extrémités des branches d'accrochage sont reliées entre elles par une portion de liaison annulaire et la partie de blocage comporte à son extrémité arrière des moyens pour son immobilisation axiale dans ladite portion de liaison annulaire.Preferably, the first ends of the attachment branches are connected to each other by an annular connection portion and the blocking part comprises at its rear end means for its axial immobilization in said annular connection portion.
Lesdits moyens d'immobilisation axiale peuvent de préférence comprendre des moyens d'encliquetage permettant l'engagement et l'immobilisation axiale de l'extrémité arrière de la partie de blocage dans ladite portion de liaison des branches d'accrochage avant le montage.Said axial immobilization means may preferably comprise latching means allowing the engagement and axial immobilization of the rear end of the locking part in said connecting portion of the latching branches before mounting.
Dans le cas où ladite empreinte est constituée par une fente transversale, lesdits moyens d'encliquetage peuvent être avantageusement constitués par des saillies extérieures sur les deux portions opposées en forme de secteur que ladite fente transversale délimite à l'extrémité arrière de la partie de blocage.In the case where said imprint is formed by a transverse slot, said latching means can advantageously be constituted by external projections on the two opposite sector-shaped portions that said transverse slot delimits at the rear end of the blocking part .
En se référant aux dessins annexés, on va décrire ci-après plus en détail deux modes de réalisation illustratifs et non limitatifs d'un dispositif de fixation conforme à l'invention; sur les dessins : la figure 1 est une coupe d'un premier mode de réalisation d'un dispositif conforme à l'invention, avant fixation dans un trou d'un support; la figure 2 représente le dispositif de la figure 1, après fixation dans le trou du support; la figure 3 est une coupe analogue à celle de la figure 1 d'un autre mode de réalisation du dispositif conforme à l'invention.Referring to the accompanying drawings, there will be described below in more detail two illustrative and non-limiting embodiments of a fixing device according to the invention; on the drawings: Figure 1 is a section of a first embodiment of a device according to the invention, before fixing in a hole of a support; 2 shows the device of Figure 1, after fixing in the hole of the support; Figure 3 is a section similar to that of Figure 1 of another embodiment of the device according to the invention.
Suivant les figures 1 et 2, un élément 1 est destiné à être fixé à un support plat 2, par exemple en tôle, comportant un trou 3 à l'endroit de fixation.According to Figures 1 and 2, an element 1 is intended to be fixed to a flat support 2, for example made of sheet metal, having a hole 3 at the place of fixing.
La fixation s'effectue à l'aide d'un dispositif 4 qui se compose d'une partie d'accrochage 5 réalisée d'une seule pièce avec l'élément 1, et d'une partie de blocage 6 séparée.The fixing is carried out using a device 4 which consists of a hooking part 5 made in one piece with the element 1, and a separate blocking part 6.
La partie d'accrochage 5 comprend essentiellement deux branches d'accrochage 7 opposées, reliées entre elles à l'une de leurs extrémités par une portion de liaison 8 annulaire, cette dernière étant à son tour reliée à l'élément 1 par une portion de jonction 9 tubulaire. La portion de liaison 8 présente un diamètre intérieur inférieur au diamètre intérieur de la portion de jonction 9, de sorte qu'un épaulement 10 subsiste à l'endroit du raccordement de la portion de liaison 8 avec la portion de jonction 9, épaulement dont la fonction apparaîtra par la suite.The attachment portion 5 essentially comprises two opposite attachment branches 7, connected to one another at one of their ends by an annular connection portion 8, the latter being in turn connected to the element 1 by a portion of tubular junction 9. The connecting portion 8 has an inner diameter smaller than the inner diameter of the joining portion 9, so that a shoulder 10 remains at the point of connection of the connecting portion 8 with the joining portion 9, a shoulder whose function will appear later.
Les branches d'accrochage 7 comprennent chacune une boucle 1 1 dont une extrémité est reliée à la portion de liaison 8 et dont l'autre extrémité est prolongée par un bec d'accrochage 12. Le bec d'accrochage 12 de chaque branche 7 comporte intérieurement, c'est-à- dire sur le côté tourné vers la branche 7 opposée, des moyens de prise 13 constitués par exemple par plusieurs dents ou tronçons de filetage échelonnés dans le sens de la longueur du bec 12. Sur le côté extérieur, le bec 12 présente une rainure 14 s'étendant transversalement à sa longueur et flanquée du côté tourné vers l'extrémité libre du bec 12 par un bossage 15 et du côté tourné vers la boucle 11 par un bossage 16 qui peut éventuellement assumer une fonction d'étanchéité. La partie de blocage 6 présente la forme générale d'une vis, comprenant une pointe 17 en tronc de cône suivie d'un fût 18 muni d'un filetage 19 à profil en dents de scie. Au voisinage de son extrémité arrière, la partie de blocage 6 comporte un collet 20 ayant un flanc avant 21 tronconique et un flanc arrière 22 perpendiculaire à l'axe de la partie 6. Le collet 20 est suivi, vers l'extrémité arrière de la partie 6, par un tronçon 23 cylindrique dont le diamètre réduit est sensiblement égal au diamètre de l'alésage de la portion de liaison 8 annulaire, et dont la longueur correspond à la longueur dudit alésage. A l'extrémité arrière, la partie de blocage 6 se termine par un tronçon 24 tronconique.The hooking branches 7 each comprise a loop 1 1, one end of which is connected to the connecting portion 8 and the other end of which is extended by a hooking spout 12. The hooking spout 12 of each branch 7 comprises internally, that is to say on the side facing the opposite branch 7, gripping means 13 constituted for example by several teeth or thread sections staggered in the direction of the length of the spout 12. On the outside, the spout 12 has a groove 14 extending transversely to its length and flanked on the side facing the free end of the spout 12 by a boss 15 and on the side facing the loop 11 by a boss 16 which can possibly assume a function of sealing. The locking part 6 has the general shape of a screw, comprising a point 17 in a truncated cone followed by a barrel 18 provided with a thread 19 with a sawtooth profile. In the vicinity of its rear end, the locking part 6 comprises a collar 20 having a frustoconical front flank 21 and a rear flank 22 perpendicular to the axis of the part 6. The collar 20 is followed towards the rear end of the part 6, by a cylindrical section 23 whose reduced diameter is substantially equal to the diameter of the bore of the annular connection portion 8, and whose length corresponds to the length of said bore. At the rear end, the blocking part 6 ends in a frustoconical section 24.
La partie de blocage 6 présente, dans sa zone d'extrémité arrière, une fente transversale diamétrale 25 s'étendant sur une profondeur suffisante pour diviser la zone d'extrémité arrière en deux secteurs présentant une certaine élasticité en flexion. Chacun desdits secteurs porte, sur la portion tronconique 24, une saillie 26 de préférence localisée dans une position angulaire décalée à 90° par rapport au plan de la fente 25.The locking part 6 has, in its rear end zone, a diametrical transverse slot 25 extending over a depth sufficient to divide the rear end zone into two sectors having a certain elasticity in bending. Each of said sectors carries, on the frustoconical portion 24, a projection 26 preferably located in an angular position offset by 90 ° relative to the plane of the slot 25.
Les saillies 26 constituent ainsi des moyens d'encliquetage grâce auxquels la partie de blocage 6 peut, après enfoncement de son extrémité arrière dans la portion de liaison 8, être immobilisée axialement par rapport à cette dernière, donc par rapport à l'élément 1 à fixer.The protrusions 26 thus constitute latching means by which the locking part 6 can, after pressing its rear end into the connecting portion 8, be immobilized axially relative to the latter, therefore relative to the element 1 to to stare.
Pour fixer l'élément 1 au support 2, on présente l'ensemble dans la position selon la figure 1, en engageant l'extrémité des becs 12 dans le trou 3. Il suffit ensuite de pousser l'élément 1 contre le support 2, par exemple par une pression exercée à l'aide de la paume de la main sur l'élément 1 dans la zone de la portion de jonction 9, pour enfoncer la partie de blocage 6 entre les becs 12 des deux branches 7. Cela provoque simultanément une flexion des boucles 1 1 dans le sens d'un écrasement des boucles 11, et une flexion vers l'extérieur des becs 12, dont un écartement des becs 12 derrière le support 2 (expansion de la partie d'accrochage 5), assurant l'accrochage des becs 12 au trou 3 du support 2. L'enfoncement de la partie de blocage 6 dans la partie d'accrochage 5 peut se poursuivre jusqu'à ce que les boucles 11 soient complètement aplaties, comme représenté sur la figure 2, le filetage 19 de la partie de blocage 6 s'accrochant dans cette position aux dents 13 des becs 12, ce qui fait que l'élément 1 se trouve maintenu fermement dans la position représentée sur la figure 2.To fix the element 1 to the support 2, the assembly is presented in the position according to FIG. 1, by engaging the end of the spouts 12 in the hole 3. It then suffices to push the element 1 against the support 2, for example by a pressure exerted with the palm of the hand on the element 1 in the area of the junction portion 9, to push the locking part 6 between the spouts 12 of the two branches 7. This simultaneously causes a bending of the loops 1 1 in the direction of crushing the loops 11, and an outward bending of the spouts 12, including a spacing of the spouts 12 behind the support 2 (expansion of the attachment portion 5), ensuring the attachment of the spouts 12 to the hole 3 of the support 2. The insertion of the blocking part 6 into the attachment part 5 can continue until the loops 11 are completely flattened, as shown in FIG. 2 , thread 19 of the blocking part 6 clinging in this position to the teeth 13 of the spouts 12, so that the element 1 is held firmly in the position shown in FIG. 2.
Pour démonter ensuite l'élément 1, en cas de besoin, on engage la lame d'un tournevis dans la fente 25 de la partie de blocage 6 et on dévisse cette dernière jusqu'à ce que la partie d'accrochage 5 reprenne par élasticité la position suivant la figure 1, ce qui permet de sortir les becs 12 sans difficulté du trou 3 du support 2.To then disassemble the element 1, if necessary, the blade of a screwdriver is engaged in the slot 25 of the locking part 6 and the screw is unscrewed until the hooking part 5 resumes by elasticity the position according to FIG. 1, which allows the nozzles 12 to be taken out without difficulty from the hole 3 of the support 2.
Le dispositif de fixation suivant la figure 3 diffère du dispositif suivant les figures 1 et 2 uniquement par le fait que la partie d'accrochage 5 est fabriquée séparément de l'élément 1 à fixer, au lieu d'être réalisée d'une seule pièce avec ce dernier. La portion de jonction 9 qui prolonge la portion de liaison 8 annulaire des branches 7 n'est donc pas solidaire de l'élément 1, mais comporte à son extrémité libre un rebord extérieur 27 qui peut être accroché derrière un rebord intérieur 28 de l'élément 1 à fixer. Le cas échéant, par une conformation appropriée du rebord 27 et/ou du rebord 28, il est possible d'établir une liaison en rotation entre ces deux parties.The fixing device according to FIG. 3 differs from the device according to FIGS. 1 and 2 only in that the attachment part 5 is produced separately from the element 1 to be fixed, instead of being made in one piece. with the latter. The junction portion 9 which extends the annular connection portion 8 of the branches 7 is therefore not integral with the element 1, but has at its free end an outer rim 27 which can be hung behind an inner rim 28 of the element 1 to fix. Where appropriate, by an appropriate conformation of the rim 27 and / or the rim 28, it is possible to establish a connection in rotation between these two parts.
On reconnaît par ailleurs sur la figure 3 que l'élément 1 à fixer comporte, suivant l'axe de la partie de blocage 6, un trou 29 permettant l'engagement d'un tournevis pour dévisser, en vue du démontage du dispositif, la partie de blocage 6 pourvue d'une fente transversale 25 à son extrémité arrière.It is also recognized in FIG. 3 that the element 1 to be fixed comprises, along the axis of the blocking part 6, a hole 29 allowing the engagement of a screwdriver to unscrew, for the purpose of dismantling the device, the locking part 6 provided with a transverse slot 25 at its rear end.
A part ces différences, le dispositif suivant la figure 3 fonctionne de la même manière que le dispositif suivant les figures 1 et 2.Apart from these differences, the device according to FIG. 3 operates in the same way as the device according to FIGS. 1 and 2.
Dans tous les cas, au moins la partie d'accrochage 5 est moulée d'une seule pièce en matière plastique, par exemple en polyamide. Le moulage de la partie d'accrochage 5 peut être considérablement simplifié par le fait que les deux branches d'accrochage 7 sont moulées à plat et ne sont amenées qu'au montage à la position suivant les figures 1 et 3, position dans laquelle les deux becs 12 sont rapprochés en vue de leur introduction dans le trou 3 du support 2, par flexion des boucles 11 des branches 7.In all cases, at least the attachment portion 5 is molded in one piece from plastic, for example polyamide. The molding of the hooking part 5 can be considerably simplified by the fact that the two hooking branches 7 are molded flat and are brought only to the mounting in the position according to FIGS. 1 and 3, position in which the two nozzles 12 are brought together for insertion into the hole 3 of the support 2, by bending the loops 11 of the branches 7.
L'immobilisation axiale de la partie de blocage 6 par rapport à la portion de liaison 8 des branches 7 de la partie d'accrochage 5 pourrait également se faire pour des moyens autres que le collet 20 et les saillies 26, qui permettent une telle immobilisation par encliquetage, avant montage, afin que le montage puisse ensuite se faire par une simple pression exercée sur l'élément 1 à fixer. Il serait possible, par exemple, de supprimer le collet 20, et de prévoir un rebord extérieur à l'extrémité arrière de la partie de blocage 6. Dans ce cas, la partie de blocage 6 devrait être engagée par sa pointe 17, à travers la portion de liaison 8, jusqu'à ce que son rebord extérieur vienne porter contre ladite portion de liaison. L'enfoncement de la partie de blocage 6 entre les becs 12 en vue de leur expansion et de l'aplatissement des boucles 1 1 nécessiterait alors une pression exercée, non pas sur l'élément 1, mais directement sur la partie de blocage 6, par exemple à l'aide d'un tournevis dont la lame serait engagée dans la fente 25. Bien entendu, il serait également possible de donner à la partie d'accrochage plus de deux branches 7, par exemple trois branches décalées à 120° ou quatre branches à 90° les unes des autres. The axial immobilization of the blocking part 6 relative to the connecting portion 8 of the arms 7 of the hooking part 5 could also to be done for means other than the collar 20 and the projections 26, which allow such immobilization by snap-fastening, before mounting, so that mounting can then be done by a simple pressure exerted on the element 1 to be fixed. It would be possible, for example, to remove the collar 20, and to provide an outer rim at the rear end of the blocking part 6. In this case, the blocking part 6 should be engaged by its point 17, through the connecting portion 8, until its outer edge comes to bear against said connecting portion. The insertion of the blocking part 6 between the spouts 12 with a view to their expansion and the flattening of the loops 1 1 would then require pressure exerted, not on the element 1, but directly on the blocking part 6, for example using a screwdriver whose blade would be engaged in the slot 25. Of course, it would also be possible to give the hooking part more than two branches 7, for example three branches offset at 120 ° or four branches at 90 ° from each other.

Claims

REVENDICATIONS
1. Dispositif de fixation d'un élément à un support mince, comprenant une partie d'accrochage pouvant être engagée depuis l'avant dans un trou du support et une partie de blocage qui, par enfoncement dans la partie d'accrochage, assure l'expansion de cette dernière et sa fixation au support, caractérisé par le fait que la partie de blocage (6) comporte un filetage extérieur (19) et que la partie d'accrochage (5) présente intérieurement des moyens de prise (13) pour coopérer avec le filetage de la partie de blocage, afin d'assurer l'immobilisation de la partie de blocage après son enfoncement dans la partie d'accrochage expansée tout en permettant le dévissage de la partie de blocage en vue du démontage.1. Device for fixing an element to a thin support, comprising a hooking part which can be engaged from the front in a hole in the support and a blocking part which, by driving in the hooking part, ensures the expansion of the latter and its attachment to the support, characterized in that the locking part (6) has an external thread (19) and that the hooking part (5) internally has gripping means (13) for cooperate with the threading of the blocking part, in order to ensure the immobilization of the blocking part after its insertion into the expanded hooking part while allowing the unscrewing of the blocking part for disassembly.
2. Dispositif suivant la revendication 1 , caractérisé par le fait que la partie d'accrochage (5) comprend au moins deux branches d'accrochage (7) opposées reliées entre elles à une première extrémité et portant intérieurement chacune lesdits moyens de prise (13) au voisinage de leur seconde extrémité.2. Device according to claim 1, characterized in that the hooking part (5) comprises at least two opposite hooking branches (7) connected to each other at a first end and internally each carrying said gripping means (13 ) near their second end.
3. Dispositif suivant la revendication 1 ou 2, caractérisé par le fait que les moyens de prise (13) sont constitués par des tronçons de filetage. 3. Device according to claim 1 or 2, characterized in that the gripping means (13) are constituted by thread sections.
4. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé par le fait que le filetage de l'une au moins des deux parties (4, 6) est un filetage en dents de scie.4. Device according to any one of the preceding claims, characterized in that the thread of at least one of the two parts (4, 6) is a sawtooth thread.
5. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé par le fait que chaque branche d'accrochage (7) comprend une boucle élastique (11) conformée de manière à subir, lors de l'enfoncement de la partie de blocage dans la partie d'accrochage engagée dans le trou du support, une flexion élastique avec écrasement axial et expansion radiale de la boucle devant le support. 5. Device according to any one of the preceding claims, characterized in that each hooking branch (7) comprises an elastic loop (11) shaped so as to undergo, when the locking part is pressed into the attachment part engaged in the hole of the support, elastic bending with axial crushing and radial expansion of the loop in front of the support.
6. Dispositif suivant la revendication 5, caractérisé par le fait que chaque boucle (1 1) est prolongée vers l'extrémité libre de la branche d'accrochage (7) par une bec (12) présentant intérieurement lesdits moyens de prise (13) et extérieurement un profilage (14) améliorant l'accrochage dans le trou (3) du support (2).6. Device according to claim 5, characterized in that each loop (1 1) is extended towards the free end of the attachment branch (7) by a spout (12) internally having said gripping means (13) and externally profiling (14) improving the attachment in the hole (3) of the support (2).
7. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé par le fait que la partie de blocage (6) comporte à son extrémité arrière une empreinte (25) pour l'engagement d'un outil de dévissage.7. Device according to any one of the preceding claims, characterized in that the blocking part (6) has at its rear end an imprint (25) for the engagement of a unscrewing tool.
8. Dispositif suivant l'une quelconque des revendications 2 à 7, caractérisé par le fait que les premières extrémités des branches d'accrochage (7) sont reliées entre elles par une portion de liaison annulaire (8) et que la partie de blocage (6) comporte à son extrémité arrière des moyens pour son immobilisation axiale dans ladite portion de liaison annulaire.8. Device according to any one of claims 2 to 7, characterized in that the first ends of the attachment branches (7) are interconnected by an annular connection portion (8) and that the locking part ( 6) has at its rear end means for its axial immobilization in said annular connection portion.
9. Dispositif suivant la revendication 8, caractérisé par le fait que lesdits moyens comprennent des moyens d'encliquetage (26) permettant l'engagement et l'immobilisation de l'extrémité arrière de la partie de blocage dans ladite portion de liaison avant le montage.9. Device according to claim 8, characterized in that said means comprise latching means (26) allowing the engagement and immobilization of the rear end of the blocking portion in said connecting portion before mounting .
10. Dispositif suivant la revendication 9, caractérisé par le fait que ladite empreinte est une fente transversale (25) et que lesdits moyens d'encliquetage sont constitués par des saillies extérieures (26) formées sur les deux portions opposées en forme de secteur que ladite fente délimite à l'extrémité arrière de la partie de blocage. 10. Device according to claim 9, characterized in that said cavity is a transverse slot (25) and that said latching means are constituted by external projections (26) formed on the two opposite portions in the form of a sector as said slot delimits at the rear end of the blocking part.
EP98925751A 1997-05-20 1998-05-20 Device for fixing an element to a thin support Withdrawn EP0983443A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9706116 1997-05-20
FR9706116A FR2763657B1 (en) 1997-05-20 1997-05-20 DEVICE FOR FIXING AN ELEMENT TO A THIN SUPPORT
PCT/FR1998/001004 WO1998053214A1 (en) 1997-05-20 1998-05-20 Device for fixing an element to a thin support

Publications (1)

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EP0983443A1 true EP0983443A1 (en) 2000-03-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98925751A Withdrawn EP0983443A1 (en) 1997-05-20 1998-05-20 Device for fixing an element to a thin support

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EP (1) EP0983443A1 (en)
FR (1) FR2763657B1 (en)
WO (1) WO1998053214A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29907428U1 (en) * 1999-04-27 2000-09-07 Mann & Hummel Filter Detachable fastening device for holding components
DE102006038040A1 (en) * 2006-08-14 2008-02-21 Ford Global Technologies, LLC, Dearborn mounting clip
DE102008007128A1 (en) * 2008-02-01 2009-08-06 Volkswagen Ag Arrangement for connecting molded part for motor vehicle, has bearing component and molded part, which comprises catching body in assembly direction, which is inserted into receiving hole of bearing component in form-fit manner
ES2371574B1 (en) * 2008-08-08 2012-11-16 Bsh Electrodomésticos España, S.A. CAP AND DOOR OF APPLIANCES WITH SUCH CAP.

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
US4391559A (en) * 1980-07-28 1983-07-05 Nifco Inc. Plastic fastener
FR2633020B1 (en) * 1988-06-21 1990-08-10 Peugeot SYSTEM FOR FIXING A TRIM AND A MEMBER SUCH AS A HANDLE ON A BODY PANEL

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9853214A1 *

Also Published As

Publication number Publication date
FR2763657B1 (en) 1999-07-02
WO1998053214A1 (en) 1998-11-26
FR2763657A1 (en) 1998-11-27

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