EP0076725B1 - Screw fastening device - Google Patents

Screw fastening device Download PDF

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Publication number
EP0076725B1
EP0076725B1 EP82401725A EP82401725A EP0076725B1 EP 0076725 B1 EP0076725 B1 EP 0076725B1 EP 82401725 A EP82401725 A EP 82401725A EP 82401725 A EP82401725 A EP 82401725A EP 0076725 B1 EP0076725 B1 EP 0076725B1
Authority
EP
European Patent Office
Prior art keywords
staple
branches
central
washer
pin
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.)
Expired
Application number
EP82401725A
Other languages
German (de)
French (fr)
Other versions
EP0076725A1 (en
Inventor
Gérard Cohen Bacri
Maurice Cheron
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.)
Airbus Group SAS
Original Assignee
Airbus Group 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 Airbus Group SAS filed Critical Airbus Group SAS
Publication of EP0076725A1 publication Critical patent/EP0076725A1/en
Application granted granted Critical
Publication of EP0076725B1 publication Critical patent/EP0076725B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B31/00—Hand tools for applying fasteners
    • B25B31/005—Hand tools for applying fasteners for temporarily connecting sheets before or during assembly operations

Definitions

  • the present invention relates to screw pinning staples as encountered in the aeronautical industry and it relates, in particular, to the particularities of these staples capable of making them more efficient.
  • inexpensive charged plastic materials having good serial molding properties can be used by offering, jointly, a good external appearance and coloring in the mass, thereby enabling them to be identify in order to make a visual selection of their diameters and / or their lengths.
  • plastics have a low mechanical resistance, much lower than metals, which has a number of drawbacks.
  • the invention proposes, in a pinning clip, a particular connection mode between a lower external plastic part and its corresponding upper external metal part.
  • connection mode is ensured by a special thread which allows the axial fitting by pressure of the hexagonal metal part in the plastic part, which has the advantage of simplifying assembly and possibly automating it, while allowing disassembly or a subsequent reassembly for the purpose, for example, of eliminating rubbery interposition products or else of replacing the damaged staple parts.
  • the invention also proposes an original method of anchoring the spacer of the staple branches which follows from the particular mode of connection of the two parts which has just been mentioned above.
  • a screw pinning staple as shown, necessarily includes a pair of staple branches 1 and 2, a branch spacer 3, the whole being located in the hole 4 practical in assembly 5, while a body marked 6 as a whole is supported on the assembly surface 7.
  • a spring 8 concentric with a rod marked 9 as a whole, while a support washer 10 serves to seat a nut 11 stopped, in abutment, by a cap 12 d 'end.
  • the rod 9 comprises, on one side, a partial smoothing at the bottom of the thread 9a which allows the nut 11 to turn madly and, on the other hand, a hexagonal part 9b which slides longitudinally in a corresponding female longitudinal imprint 6c practiced in the body 6.
  • This rod 9 is terminated by a part 9c which, by stamping, encloses the end parts of the branches 1 and 2 which, themselves, respect the radial positioning of the spacer 3 located between them.
  • the body 6 comprises a metallic upper part 6c comprising, on one side, a hexagonal external imprint and, on the other side, an internal recess whose role will be explained below.
  • connection mode to the invention which is identified (13) results from a male thread impression called artillery made in the middle zone 6a, force-fitted axially in the plastic sleeve formed by the part 6b.
  • thread flanks which are also helical, are substantially perpendicular to the axis for the faces opposite to the penetration and inclined in the manner of the usual thread flanks for what is on the side of penetration.
  • the hexagonal part 6a can be put in place by simple axial penetration pressure in the part 6b, while it can be easily removed by conventional unscrewing later.
  • the maintenance in position of the spacer 3 results, in a very simple manner, from the positioning of the parts 6a and 6b by placing a first washer 14 clamped by these parts, then by placing the branches 3a and 3b of said spacer between said washer 14 and another washer 15 located in line with the recess 16 made in part 6a so that the immobilization is thus acquired as soon as said two parts are put in place.
  • the clip is immobilized in rotation by a screwdriver nose (not shown) by enclosing the hexagonal imprint of the part 6a.
  • the screwing is carried out up to a preset torque compressing the spring 8 which ensures the tightening of the assembly 5 under the effect of its energy return (the tightening is necessary due to the presence of a polymerizable interposition product between the sheets constituting said assembly).
  • the extraction of the clip from the hole 4 after polymerization is carried out, according to the reverse maneuver, by unscrewing the nut 11, from where a push on the rod 9 towards the assembly and an output of the clip, by taking support at 17 under the hexagonal part of part 6a advantageously combined with ⁇ another support taking on the surface 7 of the assembly.
  • the invention proposes a pinning staple having improved conceptual properties allowing an increase in its mechanical qualities correlatively to a reduction in its manufacturing cost, in particular as regards the nature of certain materials used as well as through its own facilities for automated assembly.
  • the nature of the materials used is advantageously made up, for the upper part 6a, of an electrolytically protected steel and, for the lower part 6b, of the charged plastics material known commercially under the term of Rilsan, this term being an internationally registered trademark.
  • the plastic of the lower part 6b can be colored to meet a given code of staple diameter and / or staple length.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bolts, Nuts, And Washers (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Clamps And Clips (AREA)
  • Connection Of Plates (AREA)

Description

La présente invention a trait aux agrafes d'épinglage à vis telles que rencontrées dans l'industrie aéronautique et elle concerne, notamment, des particularités de ces agrafes propres à les rendre plus performantes.The present invention relates to screw pinning staples as encountered in the aeronautical industry and it relates, in particular, to the particularities of these staples capable of making them more efficient.

Les problèmes de prix de revient sont, on le sait, des facteurs importants dans la mesure où d'énormes quantités d'agrafes sont mises en oeuvre lors de la fabrication d'un avion de gros tonnage par exemple, ce qui touche, d'une part, leur conception même, allant jusqu'à rendre leur montage totalement automatique, d'autre part, la nature des matériaux utilisés pour leur élaboration.The cost problems are, as we know, important factors insofar as enormous quantities of staples are used during the manufacture of a large tonnage aircraft for example, which affects, on the one hand, their very design, going so far as to make their assembly completely automatic, on the other hand, the nature of the materials used for their development.

C'est ainsi que des matériaux plastiques chargés, peu chers, présentant de bonnes propriétés de moulage en série, peuvent être mis en oeuvre en offrant, conjointement, un bon aspect externe et une coloration dans la masse permettant, de la sorte, de les identifier en vue d'effectuer une sélection visuelle de leurs diamètres et/ou de leurs longueurs.Thus, inexpensive charged plastic materials having good serial molding properties can be used by offering, jointly, a good external appearance and coloring in the mass, thereby enabling them to be identify in order to make a visual selection of their diameters and / or their lengths.

Malheureusement les matières plastiques ont une résistance mécanique faible, très inférieure aux métaux, ce qui présente un certain nombre d'inconvénients.Unfortunately plastics have a low mechanical resistance, much lower than metals, which has a number of drawbacks.

L'art antérieur enseignait bien, à travers le brevet français No 1433662 ou les brevets US Nos 2365787 et 2345817, un mode d'assemblage d'agrafes d'épinglage entre une partie de corps externe inférieure par exemple en plastique et la partie de corps externe supérieure correspondante par exemple en métal, mais le mode de liaison retenu, par emmanchement simple, n'est pas compatible avec les dispositifs nouveaux d'extraction automatique d'agrafes tels que ceux illustrés, par exemple, dans la demande de brevet européen No 82401003-7 de la titulaire qui s'appuient, conjointement, sur l'arrière de la partie six pans du corps de l'agrafe et sur la surface de l'assemblage, d'où des risques de décollement évidents des deux dites parties.The prior art taught well, through French patent No 1433662 or US patents Nos 2365787 and 2345817, a method of assembling pinning staples between a lower external body part, for example plastic and the body part corresponding upper external, for example made of metal, but the connection method chosen, by simple fitting, is not compatible with new devices for automatic extraction of staples such as those illustrated, for example, in European patent application No 82401003-7 of the holder which are supported, jointly, on the rear of the hexagonal part of the body of the staple and on the surface of the assembly, hence the obvious risks of detachment of the two said parts.

Dans le but de remédier à ce premier inconvénient, l'invention propose, dans une agrafe d'épinglage, un mode de liaison particulier entre une partie externe inférieure en plastique et sa partie externe supérieure correspondante en métal.In order to remedy this first drawback, the invention proposes, in a pinning clip, a particular connection mode between a lower external plastic part and its corresponding upper external metal part.

Ce mode de liaison est assuré par un filetage spécial qui autorise l'emmanchement axial par pression de la partie six pans métallique dans la partie plastique, ce qui a pour avantage de simplifier le montage et de l'automatiser éventuellement, tout en permettant un démontage ou un remontage ultérieur dans le but, par exemple, d'éliminer des produits d'interposition caoutchouteux ou bien de procéder au remplacement des parties d'agrafes détériorées.This connection mode is ensured by a special thread which allows the axial fitting by pressure of the hexagonal metal part in the plastic part, which has the advantage of simplifying assembly and possibly automating it, while allowing disassembly or a subsequent reassembly for the purpose, for example, of eliminating rubbery interposition products or else of replacing the damaged staple parts.

En deuxième lieu, l'invention propose également un mode d'ancrage original de l'écarteur des branches d'agrafes qui découle du mode de liaison particulier des deux parties qui vient d'être ci-dessus mentionné.Secondly, the invention also proposes an original method of anchoring the spacer of the staple branches which follows from the particular mode of connection of the two parts which has just been mentioned above.

L'invention va de toute manière être bien comprise dans la suite du texte dont la figure unique, faite en regard, représente, en coupe longitudinale partielle, une agrafe d'épinglage selon l'invention.The invention will in any case be well understood in the remainder of the text, the single figure of which, shown opposite, represents, in partial longitudinal section, a pinning staple according to the invention.

Une agrafe d'épinglage à vis, telle que représentée, comporte nécessairement une paire de branches d'agrafe 1 et 2, un écarteur de branches 3, le tout étant situé dans le trou 4 pratique dans l'assemblage 5, tandis qu'un corps repéré 6 dans son ensemble est en appui sur la surface d'assemblage 7.A screw pinning staple, as shown, necessarily includes a pair of staple branches 1 and 2, a branch spacer 3, the whole being located in the hole 4 practical in assembly 5, while a body marked 6 as a whole is supported on the assembly surface 7.

Sur le corps 6 de l'agrafe est situé un ressort 8 concentrique à une tige repérée 9 dans son ensemble, tandis qu'une rondelle d'appui 10 sert d'assise à un écrou 11 arrêté, en butée, par un capuchon 12 d'extrémité.On the body 6 of the clip is located a spring 8 concentric with a rod marked 9 as a whole, while a support washer 10 serves to seat a nut 11 stopped, in abutment, by a cap 12 d 'end.

La tige 9 comporte, d'un côté, un lissage partiel à fond de filet 9a qui permet à l'écrou 11 de tourner fou et, d'un autre côté, une partie hexagonale 9b qui glisse longitudinalement dans une empreinte longitudinale femelle 6c correspondante pratiquée dans le corps 6.The rod 9 comprises, on one side, a partial smoothing at the bottom of the thread 9a which allows the nut 11 to turn madly and, on the other hand, a hexagonal part 9b which slides longitudinally in a corresponding female longitudinal imprint 6c practiced in the body 6.

Cette tige 9 est terminée par une partie 9c qui, par matriçage, enserre les parties terminales des branches 1 et 2 qui respectent, elles-mêmes, le positionnement radial de l'écarteur 3 situé entre elles.This rod 9 is terminated by a part 9c which, by stamping, encloses the end parts of the branches 1 and 2 which, themselves, respect the radial positioning of the spacer 3 located between them.

Le corps 6 comprend une partie supérieure 6c métallique comportant, d'un côté, une empreinte externe hexagonale et, de l'autre côté, un décrochement interne dont le rôle sera explicité par la suite.The body 6 comprises a metallic upper part 6c comprising, on one side, a hexagonal external imprint and, on the other side, an internal recess whose role will be explained below.

Le mode de liaison particulier à l'invention qui est repéré (13) résulte d'une empreinte de filetage mâle dite d'artillerie pratiquée dans la zone médiane 6a, emmanchée à force axialement dans le manchon plastique constitué par la partie 6b.The particular connection mode to the invention which is identified (13) results from a male thread impression called artillery made in the middle zone 6a, force-fitted axially in the plastic sleeve formed by the part 6b.

La caractéristique essentielle d'un tel type de filetage réside en ce que les flancs de filet, par ailleurs hélicoïdal, sont sensiblement perpendiculaires à l'axe pour les faces opposées à la pénétration et inclinés à la manière des flancs de filets habituels pour ce qui est du côté de la pénétration.The essential characteristic of such a thread type is that the thread flanks, which are also helical, are substantially perpendicular to the axis for the faces opposite to the penetration and inclined in the manner of the usual thread flanks for what is on the side of penetration.

De la sorte, la partie hexagonale 6a peut être mise en place par simple pression de pénétration axiale dans la partie 6b, tandis qu'elle peut être enlevée aisément par dévissage classique ultérieurement.In this way, the hexagonal part 6a can be put in place by simple axial penetration pressure in the part 6b, while it can be easily removed by conventional unscrewing later.

Le maintien en position de l'écarteur 3 résulte, d'une manière très simple, de la mise en position des parties 6a et 6b en disposant une première rondelle 14 en enserrement par ces parties, puis en plaçant les branches 3a et 3b dudit écarteur entre ladite rondelle 14 et une autre rondelle 15 située au droit du décrochement 16 pratiqué dans la partie 6a de telle sorte que l'immobilisation se trouve ainsi acquise dès mise en place desdites deux parties.The maintenance in position of the spacer 3 results, in a very simple manner, from the positioning of the parts 6a and 6b by placing a first washer 14 clamped by these parts, then by placing the branches 3a and 3b of said spacer between said washer 14 and another washer 15 located in line with the recess 16 made in part 6a so that the immobilization is thus acquired as soon as said two parts are put in place.

Il peut être maintenant rappelé comment la présente agrafe est mise en oeuvre d'une manière identique aux agrafes connues sans en présenter, toutefois, les inconvénients.It can now be recalled how the present staple is implemented in a manner identical to known staples without having, however, the disadvantages.

La mise en place dans le trou 4 est effectuée, écrou 11 totalement dévissé et tige 9 poussée au maximum vers le bas (position correspondant sensiblement à la fig. 1).The installation in the hole 4 is carried out, nut 11 completely unscrewed and rod 9 pushed to the maximum down (position corresponding substantially to fig. 1).

L'agrafe est immobilisée en rotation par un nez de visseuse (non représenté) en enserrant l'empreinte hexagonale de la partie 6a.The clip is immobilized in rotation by a screwdriver nose (not shown) by enclosing the hexagonal imprint of the part 6a.

Lorsque l'écrou 11 est vissé par la partie interne du nez de visseuse (non représenté), la tige 9 remonte, produisant le resserrage de l'assemblage 5 grâce aux extrémités 1 a et 2a des branches 1 et 2 écartées par l'écarteur 3.When the nut 11 is screwed through the internal part of the screwdriver nose (not shown), the rod 9 rises, producing the tightening of the assembly 5 thanks to the ends 1a and 2a of the branches 1 and 2 separated by the spacer 3.

Le vissage s'effectue jusqu'à un couple préréglé mettant en compression le ressort 8 qui assure le resserrage de l'assemblage 5 sous l'effet de sa restitution d'énergie (le resserrage est nécessaire par le fait de la présence d'un produit d'interposition polymérisable entre les tôles constituant ledit assemblage).The screwing is carried out up to a preset torque compressing the spring 8 which ensures the tightening of the assembly 5 under the effect of its energy return (the tightening is necessary due to the presence of a polymerizable interposition product between the sheets constituting said assembly).

L'extraction de l'agrafe du trou 4 après polymérisation s'effectue, selon la manoeuvre inverse, par dévissage de l'écrou 11, d'où une poussée sur la tige 9 vers l'assemblage et une sortie de l'agrafe, par prise d'appui en 17 sous la partie hexagonale de la partie 6a conjugée avantageusement avec· une autre prise d'appui sur la surface 7 de l'assemblage.The extraction of the clip from the hole 4 after polymerization is carried out, according to the reverse maneuver, by unscrewing the nut 11, from where a push on the rod 9 towards the assembly and an output of the clip, by taking support at 17 under the hexagonal part of part 6a advantageously combined with · another support taking on the surface 7 of the assembly.

Dans ces mouvements, la rotation de la tige 9 est empêchée par la présence de l'empreinte hexagonale 6c recevant le six-pans 9b ce qui entraîne corrélativement l'immobilisation en rotation des branches 1 et 2, donc de l'écarteur 3.In these movements, the rotation of the rod 9 is prevented by the presence of the hexagonal imprint 6c receiving the hexagon 9b, which correlatively causes the immobilization in rotation of the branches 1 and 2, therefore of the spacer 3.

En résumé, l'invention propose une agrafe d'épinglage possédant des propriétés conceptuelles améliorées permettant un accroissement de ses qualités mécaniques corrélativement à une diminution de son coût de fabrication, notamment en ce qui concerne la nature de certains matériaux utilisés ainsi qu'à travers ses facilités propres de montage automatisé.In summary, the invention proposes a pinning staple having improved conceptual properties allowing an increase in its mechanical qualities correlatively to a reduction in its manufacturing cost, in particular as regards the nature of certain materials used as well as through its own facilities for automated assembly.

La nature des matériaux mise en oeuvre est avantageusement constituée, pour la partie supérieure 6a, par un acier protégé par voie électrolytique et, pour la partie inférieure 6b, par la matière plastique chargée connue dans le commerce sous le terme de Rilsan, ce terme étant une marque commerciale déposée internationalement. La matière plastique de la partie inférieure 6b peut être colorée pour répondre à un code donné de diamètre d'agrafe et (ou) de longueur d'agrafe.The nature of the materials used is advantageously made up, for the upper part 6a, of an electrolytically protected steel and, for the lower part 6b, of the charged plastics material known commercially under the term of Rilsan, this term being an internationally registered trademark. The plastic of the lower part 6b can be colored to meet a given code of staple diameter and / or staple length.

Claims (4)

1. A pin staple with screw comprising an outer body (6) carrying a central rotatably locked shank (9), a spring (8) between said body and a nut (11) on a threaded portion of said central shank which is, moreover, narrower in its terminal portion, a pair of staple branches (1 and 2) crimped in the other terminal portion of said central shank, a spreader (3) lying between said staple branches and an application washer (10) of the nut upon the spring, said staple being characterized in that the outer body (6) comprises a lower portion of plastics material (6b) and an upper metallic portion (6a) having an outer hexagonal socket head (6a) and an inner recess (16) therein as well as athreading (13) of the artillerytype in its central area, said upper portion (6a) being axially fitted according to its central threaded area into the lower plastics portion (6b), whereby such fitting causes - in addition to the securement of both portions (6a and 6b) - immobilization of the branches (1 and 2) and of the spreader (3) by bringing into application the branches (3a and 3b) of the spreader, first against a first washer (14) located between the end of the upper portion (6a) and the inner bottom of the lower portion (6b), then against a second washer (15) located against the inner recess (16) in the upper portion (6a).
2. A pin staple with screw according to Claim 1, characterized in that the upper metallic portion (6a) is made of electrolytically protected steel.
3. A pin staple with screw according to Claim 1, characterized in that the lower plastics portion (6b) is made of charged Rilsan, such term being a trademark filed internationally.
4. A pin staple with screw according to Claims 1 and 3, characterized in that the plastics material of the lower portion (6a) is colored to respond to a given code for the diameter of the staple and/or the length of the staple.
EP82401725A 1981-09-29 1982-09-23 Screw fastening device Expired EP0076725B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8118309 1981-09-29
FR8118309A FR2513708A1 (en) 1981-09-29 1981-09-29 SCREW JOINTING SCREW

Publications (2)

Publication Number Publication Date
EP0076725A1 EP0076725A1 (en) 1983-04-13
EP0076725B1 true EP0076725B1 (en) 1985-03-20

Family

ID=9262561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401725A Expired EP0076725B1 (en) 1981-09-29 1982-09-23 Screw fastening device

Country Status (6)

Country Link
EP (1) EP0076725B1 (en)
JP (1) JPS5866674A (en)
CA (1) CA1204309A (en)
DE (1) DE3262690D1 (en)
FR (1) FR2513708A1 (en)
IL (1) IL66859A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106181862A (en) * 2016-08-18 2016-12-07 无锡市中捷减震器有限公司 Riveting pin assembling jig

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2919691B1 (en) 2007-08-03 2009-10-30 Lisi Aerospace Soc Par Actions SCRAPPING STAPLER AND USE THEREOF FOR TEMPORARILY FIXING A DRILLING GRID ON ASSEMBLED ELEMENTS
FR2927675B1 (en) 2008-02-19 2013-02-08 Lisi Aerospace PROVISIONAL AND REUSABLE FIXING DEVICE FOR THE PRE-ASSEMBLY OF AT LEAST TWO STRUCTURAL ELEMENTS PRE-PRINTED.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1433662A (en) * 1965-03-18 1966-04-01 Bayswater Motors Ltd Sheet clamping device
FR1491450A (en) * 1966-06-28 1967-08-11 Improvements made to screwing or unscrewing mandrels, in particular for fitting and removing sheet metal clips
FR2181216A5 (en) * 1972-04-21 1973-11-30 Bouzounie Lucien

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106181862A (en) * 2016-08-18 2016-12-07 无锡市中捷减震器有限公司 Riveting pin assembling jig

Also Published As

Publication number Publication date
FR2513708B1 (en) 1984-01-06
FR2513708A1 (en) 1983-04-01
CA1204309A (en) 1986-05-13
EP0076725A1 (en) 1983-04-13
IL66859A0 (en) 1982-12-31
IL66859A (en) 1986-12-31
DE3262690D1 (en) 1985-04-25
JPS5866674A (en) 1983-04-20

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