EP2013492A1 - Device for displaying the correct tightening force for a nut mounted on a threaded rod - Google Patents

Device for displaying the correct tightening force for a nut mounted on a threaded rod

Info

Publication number
EP2013492A1
EP2013492A1 EP06743725A EP06743725A EP2013492A1 EP 2013492 A1 EP2013492 A1 EP 2013492A1 EP 06743725 A EP06743725 A EP 06743725A EP 06743725 A EP06743725 A EP 06743725A EP 2013492 A1 EP2013492 A1 EP 2013492A1
Authority
EP
European Patent Office
Prior art keywords
washer
display device
deformable
threaded rod
nut
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Withdrawn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
EP06743725A
Other languages
German (de)
French (fr)
Inventor
Lionel Utille
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2013492A1 publication Critical patent/EP2013492A1/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Withdrawn legal-status Critical Current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
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • F16B31/028—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load with a load-indicating washer or washer assembly

Definitions

  • the present invention relates to a device for visualizing the good tightening force of a nut mounted on a threaded rod.
  • parts are assembled by bolts, that is to say, a screw and a nut or nuts mounted on studs.
  • the value of the clamping force of the nut is of little importance. By cons, in some applications, it is very important to ensure a determined tightening of the nut. This is for example the case of assembly of the elements of a crane, or the fixing of a pylon on the ground, a structure of a crane, a lift pylon, a nacelle or other, such as a carousel such as a big eight.
  • the device for visualizing the good tightening force of a nut intended for assembling two elements of a structure, by cooperation with a threaded rod is characterized in that the said display device is constituted by a viewing washer, intended to be put in place under the nut, while the viewing washer is constituted by a deformable washer made of elastic material comprising at least on its lower surface a non deformable washer.
  • the deformable washer sandwiched between two support washers of rigid material.
  • the two support washers are secured to the deformable washer by gluing or welding, performed by ultrasounds or vibrations, see by a mechanical type connection.
  • the elastic washer is for example elastomer.
  • one of the non-deformable washer comprises on its inner face a first central projection whose inner face is intended after tightening to come in abutment against the inner face of the other washer.
  • At least one of the non-deformable washers has on its internal face a second protrusion peripheral whose thickness is less than the thickness of the central projection of said washer.
  • the thickness of the peripheral projection increases from the center of the washer to the outside.
  • Figure 1 illustrates the device of the invention before assembly.
  • Figure 2 illustrates the device of the invention during assembly, but before tightening.
  • Figure 3 is an end view of Figure 2 showing that the clamping is not in conformity.
  • Figure 4 illustrates the device of the invention, once the tightening of the nut made.
  • Figure 5 is an end view illustrating that the nut is properly tightened.
  • Figure 6 is a view illustrating an alternative embodiment.
  • FIGs 7a, 7b illustrate an alternative embodiment, according to Figure 7a, the viewing washer is inactive uncompressed position, while Figure 7b illustrates the same washer once compressed.
  • FIGS. 8a, 8b and 8c illustrate another variant embodiment, FIG. 8a showing the display washer in the position ready to be assembled, FIG. 8b illustrating the washer in the inactive uncompressed position, while FIG. 8c illustrating the washer. once compressed.
  • the display device (1) is intended to be used for assembling two elements (2, 3) forming part of a structure (4), the assembly being carried out, for example, by a bolt (5) consisting of by a screw (6) and a nut (7).
  • the structure can be, for example, a crane and the assembly concerns, for example, two profiles, but the structure can also be a pylon fixed to the ground through studs sealed in a concrete block.
  • the invention may relate to any type of structure or assembly without departing from the scope of the invention.
  • the display device (1) is a display washer, intended to be put in place under the nut (7), comprising an elastically deformable element which is put in compression during the tightening of said nut.
  • the display washer (1) is constituted by a deformable washer (11) made of elastic material comprising at least on its lower surface a non-deformable washer (10a).
  • the display washer is constituted by a deformable washer (11) sandwiched between two bearing washers (10a, 10b) made of rigid material such as steel.
  • the two support washers (10a, 10b) are integral with the deformable washer (11) by clipping, gluing or welding, performed by ultrasounds or vibrations, see by a mechanical type connection.
  • the diameter (D1) of the central hole of the deformable washer (11) is for example greater than the diameter (D2) of the threaded rod (60) of the screw, but it could be otherwise. Indeed, the diameter (Dl) of the central hole of the deformable washer (11) could be slightly less than the diameter (D2) of the threaded rod (60) of the screw. Thus the display device would be engaged on the screw with a certain tightening, which allows its retention.
  • the central hole of the deformable washer could have an inwardly extending retaining projection (101), the latter thus ensuring the retention of the deformation device. visualization on the corresponding threaded rod.
  • the display device (1) thanks to its deformable washer, once compressed ensures an axial thrust on the nut, which reduces the possibility of inadvertent loosening.
  • the material of which the spring washer is made can be for example a natural rubber, a synthetic rubber, or a suitable plastic material such as a polyurethane, an elastomer or the like. Of course dimensions and elastic characteristics of the material will be chosen according to the result to be obtained.
  • the chosen material could be an elastomer of appropriate shore hardness and the thickness adapted to the conditions chosen.
  • FIGS. 7a and 7b show an alternative embodiment according to which at least one of the non-deformable washers (10a, 10b) comprises on its internal face a central projection (103) whose internal face (101) is intended after clamping to come bearing against the inner face (103) of the other washer (10b, or 10a) as shown in Figure 7b.
  • FIGS. 8a to 8c show another alternative embodiment, constituting the preferred embodiment of the invention, according to which at least one of the non-deformable washers (10a, 10b) comprises on its internal face a second peripheral projection (104).
  • the thickness (e ') of said peripheral projection (104) is less than the thickness (e) of the central projection (103), leaving a circular passage (106) for the deformable washer for viewing, once compressed.
  • the thickness (e ') of the peripheral projection (104) increases from the center of the washer outwards to form a housing for the deformable washer, having the shape of two conical cups facing the one of the other. Said second peripheral projection (104) allows the deformable washer to retract more quickly and thus to see more quickly the incorrect tightening of the nut.
  • the central projection (103) comprises an outwardly directed peripheral projection (105) making it possible to fix the deformable washer by clipping it to the non-deformable washer.
  • the deformable washer may be colored, such as yellow, red, orange, blue or phosphorescent to improve its visibility.

Abstract

Device (1) for displaying the correct tightening force for a nut (7) designed to join together two parts (2, 3) of a structure (4), by being screwed onto a threaded rod (60), the assembly being formed by, for example, a threaded fastening system (5) consisting of a bolt (6), a nut (7), at least one nondeformable washer and a display washer consisting of an elastically deformable material such as a synthetic rubber, a natural rubber, an elastomer or a polyurethane plastic, said device being characterized in that at least one of the nondeformable washers comprises on its inside face a projection (103), the inside face (101) of which is designed, following tightening, to bear against the inside face of another washer or against the part to be assembled and in that the deformable washer when compressed projects peripherally, forming an indicator of correct tightening.

Description

DISPOSITIF DE VISUALISATION DU BON EFFORT DE SERRAGE D7UN ECROU MONTE SUR UNE TIGE FILETEEVISUALIZATION DEVICE FOR THE GOOD TIGHTENING EFFORT D 7 A NUT MOUNTED ON A THREADED ROD
La présente invention concerne un dispositif de visualisation du bon effort de serrage d'un écrou monté sur une tige filetée.The present invention relates to a device for visualizing the good tightening force of a nut mounted on a threaded rod.
On trouve dans de très multiples produits, des pièces assemblées par des boulons, c'est à dire, une vis et un écrou ou par des écrous montés sur des goujons.In very many products, parts are assembled by bolts, that is to say, a screw and a nut or nuts mounted on studs.
Dans de très nombreuses applications d'assemblage de pièces par coopération d'une tige filetée et d'un écrou, la valeur de l'effort de serrage de l'écrou n'a que peu d'importance. Par contre, dans certaines applications, il est très important d'assurer un serrage déterminé de l'écrou. C'est par exemple le cas d'assemblage des éléments d'une grue, ou de la fixation d'un pylône sur le sol, d'une structure d'un pont roulant, d'un pylône de remontée mécanique, d'une nacelle ou autre, comme par exemple un manège tel qu'un grand huit.In many applications of assembly of parts by cooperation of a threaded rod and a nut, the value of the clamping force of the nut is of little importance. By cons, in some applications, it is very important to ensure a determined tightening of the nut. This is for example the case of assembly of the elements of a crane, or the fixing of a pylon on the ground, a structure of a crane, a lift pylon, a nacelle or other, such as a carousel such as a big eight.
Afin de permettre un serrage déterminé des écrous d'assemblages, les constructeurs proposent des clés dynamométriques ou des visseuses dont le serrage est taré et déterminé. Toutefois l'utilisation de tels moyens ne permettent pas de procéder à une vérification visuelle du serrage, ce qui est un handicap sérieux pour des structures assemblées comprenant parfois des centaines voir des milliers d' écrous. De plus ces moyens traditionnels n'empêche pas un desserrage intempestif qui n'est pas visible, et qui présente un inconvénient sérieux, car dans la plupart, les dispositifs concernés deviennent alors dangereux . on sait aussi que des organismes de contrôle sont chargés d'homologuer des installations mais n'ont pas à leurs dispositions d'autres moyens que la vérification par usage d'une clé dynamométrique. La présente invention a pour objet de résoudre les inconvénients cités précédemment et propose un dispositif de visualisation particulièrement simple peu coûteux et fiable.In order to allow a tight tightening of assembly nuts, the manufacturers propose torque wrenches or screwdrivers whose tightening is tared and determined. However, the use of such means do not allow a visual verification of tightening, which is a serious handicap for assembled structures sometimes including hundreds or thousands of nuts. In addition these traditional means does not prevent inadvertent loosening which is not visible, and which has a serious drawback, because in most, the devices concerned become dangerous. it is also known that control bodies are responsible for the approval of installations but do not have other means than verification by the use of a torque wrench. The present invention aims to solve the aforementioned drawbacks and provides a particularly simple viewing device inexpensive and reliable.
Ainsi, selon l'invention le dispositif de visualisation du bon effort de serrage d'un écrou destiné à l'assemblage de deux éléments d'une structure, par coopération avec une tige filetée est caractérisé en ce que ledit dispositif de visualisation est constitué une rondelle de visualisation, destinée à être mis en place sous l' écrou, tandis que la rondelle de visualisation est constituée par une rondelle déformable réalisée en matériau élastique comprenant au moins à sa surface inférieure une rondelle non déformable.Thus, according to the invention, the device for visualizing the good tightening force of a nut intended for assembling two elements of a structure, by cooperation with a threaded rod, is characterized in that the said display device is constituted by a viewing washer, intended to be put in place under the nut, while the viewing washer is constituted by a deformable washer made of elastic material comprising at least on its lower surface a non deformable washer.
Selon une caractéristique complémentaire, la rondelle déformable pris en sandwich entre deux rondelles d'appui en matériau rigide.According to a complementary feature, the deformable washer sandwiched between two support washers of rigid material.
Selon une autre caractéristique complémentaire, les deux rondelles d'appui sont solidaires de la rondelle déformable grâce à un collage ou un soudage, réalisé par ultra sons ou vibrations, voir par une liaison de type mécanique.According to another complementary feature, the two support washers are secured to the deformable washer by gluing or welding, performed by ultrasounds or vibrations, see by a mechanical type connection.
Ajoutons que la rondelle élastique est par exemple en élastomère.Add that the elastic washer is for example elastomer.
Selon une variante de réalisation, l'une des rondelle non déformable comprend sur sa face interne une première saillie centrale dont la face interne est destinée après mise en serrage à venir en appui contre la face interne de l'autre rondelle.According to an alternative embodiment, one of the non-deformable washer comprises on its inner face a first central projection whose inner face is intended after tightening to come in abutment against the inner face of the other washer.
Selon encore une autre variante de réalisation, au moins une des rondelles non déformable comporte sur sa face interne, une seconde saillie périphérique dont l'épaisseur est inférieur à l'épaisseur de la saillie centrale de ladite rondelle .According to yet another variant embodiment, at least one of the non-deformable washers has on its internal face a second protrusion peripheral whose thickness is less than the thickness of the central projection of said washer.
Selon le mode préféré de cette variante, l'épaisseur de la saillie périphérique augmente du centre de la rondelle vers l'extérieur.According to the preferred embodiment of this variant, the thickness of the peripheral projection increases from the center of the washer to the outside.
D'autres caractéristiques et avantages de l'invention se dégageront de la description qui va suivre en regard des dessins annexés qui ne sont donnés qu'à titre d'exemples non limitatifs.Other features and advantages of the invention will become apparent from the description which follows with reference to the accompanying drawings which are given by way of non-limiting examples.
La figure 1 illustre le dispositif de l'invention avant montage.Figure 1 illustrates the device of the invention before assembly.
La figure 2 illustre le dispositif de l'invention en cours de montage, mais avant serrage.Figure 2 illustrates the device of the invention during assembly, but before tightening.
La figure 3 est une vue en bout de la figure 2, montrant le fait que le serrage n'est pas conforme.Figure 3 is an end view of Figure 2 showing that the clamping is not in conformity.
La figure 4 illustre le dispositif de l'invention, une fois le serrage de l'écrou réalisé.Figure 4 illustrates the device of the invention, once the tightening of the nut made.
La figure 5 est une vue en bout, illustrant le fait que l'écrou est correctement serré.Figure 5 is an end view illustrating that the nut is properly tightened.
La figure 6 est une vue illustrant une variante de réalisation.Figure 6 is a view illustrating an alternative embodiment.
Les figures 7a, 7b illustrent une variante de réalisation, selon la figure 7a , la rondelle de visualisation est en position inactive non comprimée, tandis que la figure 7b illustre cette même rondelle une fois comprimée.Figures 7a, 7b illustrate an alternative embodiment, according to Figure 7a, the viewing washer is inactive uncompressed position, while Figure 7b illustrates the same washer once compressed.
Les figures 8a, 8b, 8c illustrent une autre variante de réalisation, ,1a figure 8a représentant la rondelle de visualisation en position prêt à être assemblée, la figure 8b illustrant la rondelle en position inactive non comprimée, tandis que la figure 8c illustre la rondelle une fois comprimée. Le dispositif de visualisation (1) est destiné à être utilisé pour l'assemblage de deux éléments (2, 3) faisant partie d'une structure (4), l'assemblage étant réalisé, par exemple, par un boulon (5) constitué par une vis (6) et un écrou (7).FIGS. 8a, 8b and 8c illustrate another variant embodiment, FIG. 8a showing the display washer in the position ready to be assembled, FIG. 8b illustrating the washer in the inactive uncompressed position, while FIG. 8c illustrating the washer. once compressed. The display device (1) is intended to be used for assembling two elements (2, 3) forming part of a structure (4), the assembly being carried out, for example, by a bolt (5) consisting of by a screw (6) and a nut (7).
La structure peut être, par exemple, une grue et l'assemblage concerne, par exemple, deux profilés, mais la structure peut être aussi un pylône fixé au sol grâce à des goujons scellés dans un bloc de béton. Bien entendu l'invention peut concerner tout types de structures ou d'assemblages sans pour autant sortir du cadre de l'invention.The structure can be, for example, a crane and the assembly concerns, for example, two profiles, but the structure can also be a pylon fixed to the ground through studs sealed in a concrete block. Naturally, the invention may relate to any type of structure or assembly without departing from the scope of the invention.
Selon l'invention, le dispositif de visualisation (1) est une rondelle de visualisation, destinée à être mis en place sous l'écrou (7), comprenant un élément déformable élastiquement qui est mis en compression lors du serrage dudit écrou.According to the invention, the display device (1) is a display washer, intended to be put in place under the nut (7), comprising an elastically deformable element which is put in compression during the tightening of said nut.
Ainsi, la rondelle de visualisation (1) est constituée par une rondelle déformable (11) réalisée en matériau élastique comprenant au moins à sa surface inférieure une rondelle non déformable (10a).Thus, the display washer (1) is constituted by a deformable washer (11) made of elastic material comprising at least on its lower surface a non-deformable washer (10a).
Selon l'invention, la rondelle de visualisation est constituée par une rondelle déformable (11) pris en sandwich entre deux rondelles d'appui (10a,10b) en matériau rigide tel qu'en acier. De plus les deux rondelles d'appui (10a, 10b) sont solidaires de la rondelle déformable (11) grâce à un clipsage, collage ou un soudage, réalisé par ultra sons ou vibrations, voir par une liaison de type mécanique.According to the invention, the display washer is constituted by a deformable washer (11) sandwiched between two bearing washers (10a, 10b) made of rigid material such as steel. In addition, the two support washers (10a, 10b) are integral with the deformable washer (11) by clipping, gluing or welding, performed by ultrasounds or vibrations, see by a mechanical type connection.
On a compris que lors du serrage de l'écrou (7) il y a écrasement de la rondelle élastique, qui se déforme à sa périphérie, tel que cela est illustré à la figure 3 et à la figure 4, la partie (100) de la rondelle déformable faisant saillie périphériquement constitue un indicateur de bon serrage. Ainsi, par un simple coup d'oeil sur les boulons de la structure, l'utilisateur pourra constater que ces derniers sont bien serrés. On a compris aussi, que si l'écrou venait à se desserrer, la rondelle élastique (11) se décomprimerait et la partie en saillie périphérique disparaîtrait au moins en partie. Ainsi, par un simple coup d'ceil sur les boulons de la structure, l'utilisateur pourra constater si l'un ou l'autre de ces derniers sont tout ou en partie desserrés.It was understood that when tightening the nut (7) there is crushing of the spring washer, which deforms at its periphery, as shown in FIG. Figure 3 and in Figure 4, the portion (100) of the deformable washer projecting peripherally is an indicator of good tightening. Thus, at a glance on the bolts of the structure, the user can see that they are tight. It was also understood that if the nut were loosened, the spring washer (11) would decompress and the peripheral projecting portion would disappear at least in part. Thus, by a quick glance on the bolts of the structure, the user can see if any of these are all or partly loose.
Le diamètre (Dl) du trou central de la rondelle déformable (11) est par exemple supérieur au diamètre (D2) de la tige filetée (60) de la vis, mais il pourrait en être autrement. En effet, le diamètre (Dl) du trou central de la rondelle déformable (11) pourrait être légèrement inférieur au diamètre (D2) de la tige filetée (60) de la vis. Ainsi le dispositif de visualisation serait engagé sur la vis avec un certain serrage, ce qui permet sa retenue.The diameter (D1) of the central hole of the deformable washer (11) is for example greater than the diameter (D2) of the threaded rod (60) of the screw, but it could be otherwise. Indeed, the diameter (Dl) of the central hole of the deformable washer (11) could be slightly less than the diameter (D2) of the threaded rod (60) of the screw. Thus the display device would be engaged on the screw with a certain tightening, which allows its retention.
Dans un autre mode de réalisation, tel que cela est illustré à la figure 5, le trou central de la rondelle déformable pourrait avoir une saillie de retenue (101) s'étendant vers l'intérieur, cette dernière assurant ainsi la retenue du dispositif de visualisation sur la tige filetée correspondante.In another embodiment, as shown in FIG. 5, the central hole of the deformable washer could have an inwardly extending retaining projection (101), the latter thus ensuring the retention of the deformation device. visualization on the corresponding threaded rod.
On notera que le dispositif de visualisation (1) grâce à sa rondelle déformable, une fois comprimée assure une poussée axiale sur l'écrou, ce qui diminue la possibilité d'un desserrage intempestif.It will be noted that the display device (1) thanks to its deformable washer, once compressed ensures an axial thrust on the nut, which reduces the possibility of inadvertent loosening.
Le matériau dont est réalisé la rondelle élastique peut être par exemple un caoutchouc naturel, un caoutchouc synthétique, ou un matériau plastique approprié tel qu'un polyuréthane, un élastomère ou autre. Bien entendu les dimensions et les caractéristiques élastiques du matériau seront choisies en fonction du résultat à obtenir.The material of which the spring washer is made can be for example a natural rubber, a synthetic rubber, or a suitable plastic material such as a polyurethane, an elastomer or the like. Of course dimensions and elastic characteristics of the material will be chosen according to the result to be obtained.
Ainsi, le matériau choisi pourrait être un élastomère de dureté shore appropriée et l'épaisseur adaptée aux conditions choisies.Thus, the chosen material could be an elastomer of appropriate shore hardness and the thickness adapted to the conditions chosen.
Les figures 7a, 7b représentent une variante de réalisation selon laquelle au moins une des rondelles non déformable (10a, 10b) comprend sur sa face interne une saillie centrale (103) dont la face interne (101) est destinée après mise en serrage à venir en appui contre la face interne (103) de l'autre rondelle (10b, ou 10a) tel que cela est illustré à la figure 7b.FIGS. 7a and 7b show an alternative embodiment according to which at least one of the non-deformable washers (10a, 10b) comprises on its internal face a central projection (103) whose internal face (101) is intended after clamping to come bearing against the inner face (103) of the other washer (10b, or 10a) as shown in Figure 7b.
Les figures 8a à 8c représentent une autre variante de réalisation, constituant le mode préféré de l'invention, selon laquelle au moins une des rondelles non déformable (10a, 10b) comprend sur sa face interne une seconde saillie périphérique (104).FIGS. 8a to 8c show another alternative embodiment, constituting the preferred embodiment of the invention, according to which at least one of the non-deformable washers (10a, 10b) comprises on its internal face a second peripheral projection (104).
L'épaisseur (e') de ladite saillie périphérique (104) est inférieure à l'épaisseur (e) de la saillie centrale (103), laissant un passage circulaire (106) pour la rondelle déformable permettant sa visualisation, une fois comprimée.The thickness (e ') of said peripheral projection (104) is less than the thickness (e) of the central projection (103), leaving a circular passage (106) for the deformable washer for viewing, once compressed.
Selon le mode de réalisation illustré, l'épaisseur (e') de la saillie périphérique (104) augmente du centre de la rondelle vers l'extérieur Pour former un logement pour la rondelle déformable, ayant la forme de deux cuvettes coniques en regard l'une de l'autre. Ladite seconde saillie périphérique (104) permet à la rondelle déformable de se rétracter plus rapidement et donc de s'apercevoir plus rapidement du mauvais serrage de l'écrou.According to the illustrated embodiment, the thickness (e ') of the peripheral projection (104) increases from the center of the washer outwards to form a housing for the deformable washer, having the shape of two conical cups facing the one of the other. Said second peripheral projection (104) allows the deformable washer to retract more quickly and thus to see more quickly the incorrect tightening of the nut.
Selon une autre caractéristique de l'invention, la saillie centrale (103) comprend une saillie (105) périphérique orientée vers l'extérieure permettant de fixer par clipsage la rondelle déformable à la rondelle non déformable.According to another characteristic of the invention, the central projection (103) comprises an outwardly directed peripheral projection (105) making it possible to fix the deformable washer by clipping it to the non-deformable washer.
Notons aussi que la rondelle déformable pourra être colorée, comme par exemple en jaune, rouge, orange, bleu ou phosphorescente pour améliorer sa visibilité.Note also that the deformable washer may be colored, such as yellow, red, orange, blue or phosphorescent to improve its visibility.
Bien entendu, l'invention n'est pas limitée aux modes de réalisation décrits et représentés à titre d'exemples, mais elle comprend aussi tous les équivalents techniques ainsi que leurs combinaisons. Of course, the invention is not limited to the embodiments described and represented by way of examples, but it also includes all the technical equivalents as well as their combinations.

Claims

REVENDICATIONS
1. Dispositif de visualisation (1) du bon effort de serrage d'un écrou (7) destiné à l'assemblage de deux éléments (2, 3) d'une structure (4), par coopération avec une tige filetée (60) l'assemblage étant réalisé, par exemple, par un boulon (5) constitué par une vis (6), un écrou (7), au moins une rondelle non déformable et une rondelle de visualisation constituée en matériau déformable élastiquement comme un caoutchouc synthétique, un caoutchouc naturel, un élastomère ou un matériau plastique polyuréthane caractérisé en ce que au moins une des rondelles non déformable comprend sur sa face interne une saillie (103) dont la face interne (101) est destinée, après mise en serrage, à venir en appui contre la face interne d'une autre rondelle ou contre l'élément à assembler et en ce que la rondelle déformable lors de son écrasement fait saillie périphériquement , constituant un indicateur de bon serrage.1. Device for visualizing (1) the good tightening force of a nut (7) intended for the assembly of two elements (2, 3) of a structure (4), by cooperation with a threaded rod (60) the assembly being made, for example, by a bolt (5) consisting of a screw (6), a nut (7), at least one non-deformable washer and a viewing washer made of elastically deformable material such as a synthetic rubber, a natural rubber, an elastomer or a polyurethane plastic material characterized in that at least one of the non-deformable washers comprises on its inner face a projection (103) whose inner face (101) is intended, after being clamped, to come into bearing against the inner face of another washer or against the element to be assembled and in that the deformable washer during its crushing projects peripherally, constituting an indicator of good tightening.
2. Dispositif de visualisation (1) selon la revendication 1, caractérisé en ce que au moins une des rondelles non déformable (10a, 10b) comporte sur sa face interne (101) une second saillie périphérique (104).2. Display device (1) according to claim 1, characterized in that at least one of the non-deformable washers (10a, 10b) has on its inner face (101) a second peripheral projection (104).
3. Dispositif de visualisation (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur (e') de la seconde saillie périphérique (104) est inférieur à l'épaisseur (e) de la première saillie (103) ayant la fonction de porté mécanique.3. Display device (1) according to any one of the preceding claims, characterized in that the thickness (e ') of the second peripheral projection (104) is less than the thickness (e) of the first projection ( 103) having the function of mechanical wear.
4. Dispositif de visualisation (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur (e') la seconde saillie périphérique (104) augmente du centre de la rondelle vers l'extérieur. 4. Display device (1) according to any one of the preceding claims, characterized in that the thickness (e ') the second peripheral projection (104) increases from the center of the washer to the outside.
5. Dispositif de visualisation (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la rondelle déformable (11) est pris en sandwich entre deux rondelles d'appui (10a,10b) en matériau rigide.5. Display device (1) according to any one of the preceding claims, characterized in that the deformable washer (11) is sandwiched between two bearing washers (10a, 10b) of rigid material.
6. Dispositif de visualisation (1) selon la revendication 5, caractérisé en ce que les deux rondelles d'appui (10a, 10b) sont solidaires de la rondelle déformable (11) grâce à un collage ou un soudage, réalisé par ultra sons ou vibrations, voir par une liaison de type mécanique.6. Display device (1) according to claim 5, characterized in that the two bearing washers (10a, 10b) are secured to the deformable washer (11) by gluing or welding, made by ultra sounds or vibrations, see by a mechanical type connection.
7. Dispositif de visualisation (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la rondelle déformable est colorée, comme par exemple en jaune, rouge, orange ou bleu pour améliorer sa visibilité.7. Display device (1) according to any one of the preceding claims, characterized in that the deformable washer is colored, such as yellow, red, orange or blue to improve its visibility.
8. Dispositif de visualisation (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le diamètre (Dl) du trou central de la rondelle déformable (11) est légèrement inférieur au diamètre (D2) de la tige filetée (60), afin que le dispositif de visualisation soit engagé sur la vis avec un certain serrage.8. Display device (1) according to any one of the preceding claims, characterized in that the diameter (Dl) of the central hole of the deformable washer (11) is slightly less than the diameter (D2) of the threaded rod (60 ), so that the display device is engaged on the screw with a certain tightening.
9. Dispositif de visualisation (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le trou central de la rondelle déformable comprend une saillie de retenue (101) s'étendant vers l'intérieur, cette dernière assurant ainsi la retenue du dispositif de visualisation sur la tige filetée correspondante. 9. Display device (1) according to any one of the preceding claims, characterized in that the central hole of the deformable washer comprises a retaining projection (101) extending inwardly, the latter thus ensuring the restraint of the display device on the corresponding threaded rod.
EP06743725A 2006-04-19 2006-04-19 Device for displaying the correct tightening force for a nut mounted on a threaded rod Withdrawn EP2013492A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2006/000906 WO2007118941A1 (en) 2006-04-19 2006-04-19 Device for displaying the correct tightening force for a nut mounted on a threaded rod

Publications (1)

Publication Number Publication Date
EP2013492A1 true EP2013492A1 (en) 2009-01-14

Family

ID=36956209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06743725A Withdrawn EP2013492A1 (en) 2006-04-19 2006-04-19 Device for displaying the correct tightening force for a nut mounted on a threaded rod

Country Status (3)

Country Link
US (1) US20090311066A1 (en)
EP (1) EP2013492A1 (en)
WO (1) WO2007118941A1 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20072125A1 (en) * 2007-11-06 2009-05-07 Nordsinter Srl VISUAL SIGNALING DEVICE FOR THE COUPLING CONDITION BETWEEN TWO MECHANICAL ORGANS
US8192102B2 (en) * 2008-11-26 2012-06-05 The Boeing Company Load absorption system
FR2955366B1 (en) * 2010-01-20 2012-03-09 Alcoa Fixations Simmonds Sas DEVICE FOR VISUALIZING THE LOOSENING OF A BOLT OR A SCREW
DE102010043170B3 (en) * 2010-10-29 2012-04-12 Hilti Aktiengesellschaft Sensor arrangement, for example on an anchor bolt
JP5910971B2 (en) * 2013-05-24 2016-04-27 イナバゴム株式会社 Looseness detection device for tightening and fixing members
US9574597B2 (en) 2014-06-30 2017-02-21 Lenovo Enterprise Solutions (Singapore) Pte. Ltd. Fastening device
DE102015224367A1 (en) * 2015-12-04 2017-06-08 Ejot Baubefestigungen Gmbh Fixed or floating point screw
EP3402945A4 (en) * 2016-01-11 2019-07-17 Jonathan J. Melic System for anchoring a post to a concrete slab or other structure
GB201610819D0 (en) * 2016-06-21 2016-08-03 Smart Component Tech Ltd Monitoring system and method
US20180340447A1 (en) * 2017-05-25 2018-11-29 General Electric Company Crushable spacer and bolted joint for a gas turbine engine
JP6580088B2 (en) * 2017-06-09 2019-09-25 株式会社東海理化電機製作所 Webbing take-up device
US11085485B1 (en) 2017-08-09 2021-08-10 Short Run Pro, LLC Method of installing a fastener into a surface and a washer for use therewith
FR3092882B1 (en) * 2019-02-19 2022-10-14 Lionel Utille DEVICE FOR VISUALIZING VOLTAGE LOSS IN AN ASSEMBLY
ES2965301T3 (en) * 2020-05-14 2024-04-12 Sandvik Mining And Construction Tools Ab A tension indicator for a rock bolt
FR3115342B1 (en) * 2020-10-16 2022-10-21 Safran Aircraft Engines EXTENDABLE SEALING DEVICE, PARTICULARLY FOR A VARIABLE PITCH BLADE BLOWER
EP4067675A1 (en) 2021-04-01 2022-10-05 Axis AB Threaded joint arrangement
WO2024022570A1 (en) * 2022-07-25 2024-02-01 Worxsafe Ab A composite washer for force indication and loosening prevention

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1235594A (en) * 1916-09-19 1917-08-07 C Q Moore Nut-lock.
US3021747A (en) * 1953-03-19 1962-02-20 Goodyear Tire & Rubber Method and washer means including a calibrated rubber layer for measuring bolt tension
US3153974A (en) * 1961-04-26 1964-10-27 Western Electric Co Method of and device for indicating a predetermined pressure exerted by a fastener
US3212393A (en) * 1962-07-13 1965-10-19 Standard Pressed Steel Co Concave washer
US3216303A (en) * 1963-12-03 1965-11-09 Melzer Franklin Load sensing and indicating means
US3331272A (en) * 1965-05-24 1967-07-18 Illinois Tool Works Thread forming nut and tapered stud
GB1184033A (en) * 1967-02-16 1970-03-11 Daimler Benz Ag Improvements relating to Washers for Screw Connections
US3464474A (en) * 1968-01-29 1969-09-02 Harry B Jansen Fastener with spring biased lock
GB1268862A (en) * 1968-05-31 1972-03-29 Standard Pressed Steel Co Self-locking fastener
US3678979A (en) * 1969-12-17 1972-07-25 Illinois Tool Works Sealing washer
US3897713A (en) * 1974-03-06 1975-08-05 Illinois Tool Works Double-ended stud
CA1050828A (en) * 1975-11-14 1979-03-20 Illinois Tool Works Inc. Tension indicating washer unit
US4310273A (en) * 1979-04-30 1982-01-12 Textron Inc. Fastener assembly
DE3148730A1 (en) * 1981-12-09 1983-07-21 HIS Handels- und Industriebedarf GmbH, 4350 Recklinghausen Shim unit
GB2120795A (en) 1982-05-06 1983-12-07 Priest And Sons Ltd Benjamin Load-indicating washer
US4571133A (en) * 1984-07-23 1986-02-18 General Motors Corporation Loading washer assembly
GB8807677D0 (en) * 1988-03-31 1988-05-05 Wednesbury Charles Ltd Fasteners
US5188494A (en) * 1992-04-21 1993-02-23 Itt Corporation Torque indicator device and method for use with a threaded fastener
WO1994013964A1 (en) * 1992-12-10 1994-06-23 Norman Leslie Matthews Improved fastener
US6095739A (en) * 1998-07-02 2000-08-01 Albertson; Stephen H. Categorizing fasteners and construction connectors using visual identifiers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007118941A1 *

Also Published As

Publication number Publication date
WO2007118941A1 (en) 2007-10-25
US20090311066A1 (en) 2009-12-17

Similar Documents

Publication Publication Date Title
EP2013492A1 (en) Device for displaying the correct tightening force for a nut mounted on a threaded rod
FR2780756A1 (en) BOLT AND NUT LOCKING SYSTEM
FR2941029A1 (en) DEVICE FOR ANCHORING AN ELEMENT IN AN OPENING OF A WALL AND CONNECTING EQUIPPED WITH SUCH A DEVICE
CA2992532A1 (en) Assembly comprising a locked securing stud
FR2955366A1 (en) Visualizing device for loosening of e.g. bolt in automobiles, has set of units gripped with another set of units when washers are applied to ring without prohibiting radial displacement of one of washers with respect to other washer
WO2020169450A1 (en) Device for viewing tension loss in an assembly
EP2918856B1 (en) Washer intended for being used in a screwed assembly and assembly method using the washer
EP2551534B1 (en) Assembly element and piece of furniture in kit form that includes such an assembly element
FR2881194A1 (en) Nut`s tightening effect indicating device for assembling two units of e.g. mast, has colored deformable washer sandwiched between two non-deformable supporting washers, and comprising central hole with retaining projection extending inwards
EP1605195B1 (en) Pipe coupling system and associated method of assembly
EP3085626B1 (en) Ball-jointed nut cap
EP1186821A1 (en) Pipe coupling
FR2906854A1 (en) Structure e.g. trestle, elements locking visualizing device for use during fixation of vehicle wheel, has spring lock washer interposed between two support washers, where one of support washers is directed towards colored visualizing washer
FR2490544A1 (en) DEVICE FOR TIGHTENING AN ELASTIC PLASTIC ELEMENT ON A METAL SUPPORT
FR3002993A1 (en) VISSABLE ASSEMBLY MEMBER
FR3065498B1 (en) SECURED HEAD SCREW SYSTEM AND METHOD OF MANUFACTURING SUCH A SYSTEM
EP3859170B1 (en) Bolt comprising a nut and at least one washer obtained by hardening of a pasty material, method for installing said bolt and assembly comprising at least one such bolt
EP2094978A1 (en) Nut with a deformable collar
WO2018086918A1 (en) Mechanical transmission device
EP3283779A1 (en) Deformable screw assembly
EP4148289A1 (en) Pre-cut intermediate element for obtaining an intermediate washer positioned between parts of an assembly and method for assembling at least two parts using at least one such pre-cut intermediate element
FR2813938A1 (en) Pipe connector comprises single piece ring formed by joint and tube clamping part, nut clipped on ring in deformable part which ensures clamping on pipe
WO2019229336A1 (en) Steering assembly comprising a sealing element which improves a seal of a steering ball joint
FR2958263A1 (en) Connection assembly for engine nacelle stub utilized to fix engine under aerofoil of aircraft, has pin sliding inside interior secondary axle along L-shaped cross-piece for driving displacement of L-shaped foot before fitting aerofoil
FR3114624A1 (en) MARKER NUT FOR BOLT ATTACHMENT AND CORRESPONDING METHOD OF ASSEMBLY

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20081114

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

17Q First examination report despatched

Effective date: 20090123

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20100519