FR2490297A1 - Anchor bolt for concrete - has expandable segments which enclose whole of unthreaded part of expander bolt - Google Patents
Anchor bolt for concrete - has expandable segments which enclose whole of unthreaded part of expander bolt Download PDFInfo
- Publication number
- FR2490297A1 FR2490297A1 FR8020373A FR8020373A FR2490297A1 FR 2490297 A1 FR2490297 A1 FR 2490297A1 FR 8020373 A FR8020373 A FR 8020373A FR 8020373 A FR8020373 A FR 8020373A FR 2490297 A1 FR2490297 A1 FR 2490297A1
- Authority
- FR
- France
- Prior art keywords
- rod
- smooth part
- bolt
- nut
- annular element
- 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.)
- Pending
Links
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000037452 priming Effects 0.000 claims description 2
- 238000004873 anchoring Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 2
- 239000007779 soft material Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
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
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/065—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting the screw, nail or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
- Dowels (AREA)
Abstract
Description
La présente invention se rapporte à un goujon de fixation, du genre comprenant dune part une tige avec une partie filetée recevant un écrou, une partie lisse cylindrique de diamètre plus faible que la partie filetée, et un prolongement tronconique de la partie lisse, d'autre part un élément annulaire expansible mis en place autour de la partie lisse de la tige. The present invention relates to a fixing stud, of the type comprising on the one hand a rod with a threaded part receiving a nut, a cylindrical smooth part of smaller diameter than the threaded part, and a frustoconical extension of the smooth part, on the other hand, an expandable annular element placed around the smooth part of the rod.
Les goujons de ce genre permettent des fixations diverses, notamment sur des murs en béton, le serrage provoquant l'expansion de ltélément annulaire étant obtenu par le vissage de l'écrou sur la partie filetée de la tige. Studs of this kind allow various fastenings, in particular on concrete walls, the tightening causing the expansion of the annular element being obtained by screwing the nut on the threaded part of the rod.
Les goujons de ce genre actuellement disponibles dans le commerce possèdent, comme élément annulaire expansible, un simple a & neau fendu monté initialement autour de la seule partie lisse de plus faible diamètre de la tige, cet anneau comportant extérieurement quelques aspérités. Avec des goujons de fixation ainsi réalisés, l'ancrage dans des matières assez tendres ne peut être correctement obtenu : au moment du vissage de l'écrou sur la partie filetez, l'anneau risque de glisser contre les parois du trou, au lieu de "monter" sur la partie tronconique de la tige ltexpansion de l'anneau ne s'amorce pas et,au lieu d'ancrer le goujon dans le trou, on provoque seulement la sortie de la tige hors de ce trou. Studs of this type currently available on the market have, as an expandable annular element, a simple split ring initially mounted around the single smooth part of smaller diameter of the rod, this ring externally having some roughness. With fixing studs thus produced, anchoring in fairly soft materials cannot be correctly obtained: when the nut is screwed onto the threaded part, the ring may slip against the walls of the hole, instead of "climb" on the frustoconical part of the rod ltexpansion of the ring does not start and, instead of anchoring the stud in the hole, it causes only the exit of the rod out of this hole.
La présente invention vise à remédier à cet inconv6- nient, donc à fournir un goujon de fixation pouvant s'ancrer efficacement même dans une matière tendre. The present invention aims to remedy this drawback, therefore to provide a fixing stud which can be effectively anchored even in a soft material.
A cet effet, dans le goujon de fixation objet de l'invention, du genre rappelé en introduction, ltélément annulaire expansible recouvre initialement toute la partie lisse de la tige, y compris le prolongement tronconique, et une entretoise tubulaire est montée autour de ladite tige, entre ltélément annulaire expansible et ltécrou visse sur la partie filetée de la tige. To this end, in the fixing stud that is the subject of the invention, of the type mentioned in the introduction, the expandable annular element initially covers the entire smooth part of the rod, including the frustoconical extension, and a tubular spacer is mounted around said rod. , between the expandable annular element and the nut screwed onto the threaded part of the rod.
Ainsi, l'invention prévoit un organe supplémentaire, liant positivement le déplacement axial de l'écrou à celui de l'élément expansible : au moment du serrage de ltécrou, l'entretoise aura pour rôle de pousser nécessairement l'élé- ment expansible sur la partie tronconique de la tige, pour obtenir sa déformation. De plus, 1'expansion de cet élément s'amorce immediatement, du fait qu'il recouvre entièrement la partie lisse de la tige, y compris le prolongement tronconique de cette partie lisse, et le goujon selon l'invention ne nécessite aucun serrage initial de l'élément expansible. L'ancrage peut donc titre obtenu de façon sure dans tous les matériaux, même les plus tendres. Thus, the invention provides an additional member, positively linking the axial displacement of the nut to that of the expandable element: when tightening the nut, the spacer will necessarily push the expandable element on the frustoconical part of the rod, to obtain its deformation. In addition, the expansion of this element begins immediately, because it completely covers the smooth part of the rod, including the frustoconical extension of this smooth part, and the stud according to the invention requires no initial tightening. of the expandable element. Anchoring can therefore be obtained securely in all materials, even the most tender.
Suivant une forme de realisation preferée de l'invention, l'élément annulaire expansible, recouvrant initialement toute la partie lisse de la tige, est divisé en plusieurs secteurs, dont le profil interne correspond à la partie lisse de la tige, ces secteurs étant réunis entre eux et appliqués contre la tige au moyen d'un lien élastique annulaire. Cette structure permet d'avoir un montage facile et une forme initialement cylindrique pour ltensem- ble du goujon, tout en procurant une expansion forte, les différents secteurs s'encartant nettement les uns des autres lorsquils sont poussés par l'intermédiaire de l'entretoi- se tubulaire, au moment du vissage de ltécrou. According to a preferred embodiment of the invention, the expandable annular element, initially covering the entire smooth part of the rod, is divided into several sectors, the internal profile of which corresponds to the smooth part of the rod, these sectors being combined between them and applied against the rod by means of an annular elastic link. This structure makes it possible to have an easy assembly and an initially cylindrical shape for the entire length of the stud, while providing a strong expansion, the different sectors clearly separating from each other when they are pushed through the spacer. - tubular, when the nut is screwed.
La tige du goujon de fixation objet de l'invention peut rester identique à celles des goujons actuels du même genre. Toutefois il est avantageusement prévu, à ltextrémi- té libre de la partie filetée de cette tige, des moyens de blocage en rotation de cette tige pendant le temps d'amor çage ; ces moyens sont par exemple des méplats, des conformations à 6 pans (mâles ou femelles), une fente, etc., coopérant avec un outil approprie. The rod of the fixing stud that is the subject of the invention may remain identical to that of current studs of the same kind. However, it is advantageously provided, at the free end of the threaded part of this rod, means for blocking the rotation of this rod during the priming time; these means are for example flats, hexagonal conformations (male or female), a slot, etc., cooperating with an appropriate tool.
De toute façon, 1'invention sera mieux comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple non limitatif, une forme de réalisation de ce goujon de fixation
Figure 1 est une vue d'ensemble, en perspective ecla- tée, d'un goujon de fixation conforme à-l'invention
Figure 2 est une vue de côté du même goujon, assemblé;
Figure 3 est une vue en coupe passant par l'axe de ce goujon, en position initiale
Figure 4 est une vue en coupe passant par l'axe du même goujon, mais en position finale d'ancrage.In any case, the invention will be better understood with the aid of the description which follows, with reference to the appended schematic drawing representing, by way of nonlimiting example, an embodiment of this fixing stud
Figure 1 is an overall view, in exploded perspective, of a fixing stud according to the invention
Figure 2 is a side view of the same stud, assembled;
Figure 3 is a sectional view passing through the axis of this stud, in the initial position
Figure 4 is a sectional view passing through the axis of the same stud, but in the final anchoring position.
Le goujon de fixation représenté sur les figures comprend, de façon connue, une tige i dans laquelle on distingue
- une partie filetée 2 recevant un écrou 2,
- une partie lisse cylindrique 4, de diamètre plus faible que la partie filetée 2, et séparée de cette dernière par un épaulement annulaire 5
- un prolongement tronconique 6 de la partie lisse 4, le diamètre de ce prolongement cylindrique étant croissant en direction de ltextrémité de la tige i.The fixing stud shown in the figures comprises, in a known manner, a rod i in which there are
- a threaded part 2 receiving a nut 2,
- A cylindrical smooth part 4, of smaller diameter than the threaded part 2, and separated from the latter by an annular shoulder 5
- A frustoconical extension 6 of the smooth part 4, the diameter of this cylindrical extension increasing in the direction of the end of the rod i.
Autour de la partie lisse de la tige i est mis en place un élément annulaire expansible, désigne dans son ensemble par le repère 1. Selon l'invention, cet élément recouvre initialement la partie cylindrique 4 et son prolongement tronconique 6, et il est composé de trois pièces identiques 8 réunies au moyen d'un lien élastique annulaire 9. Around the smooth part of the rod i is an expandable annular element, generally designated by the reference 1. According to the invention, this element initially covers the cylindrical part 4 and its frustoconical extension 6, and it is composed of three identical pieces 8 joined together by means of an annular elastic link 9.
Chaque pièce 8 correspond à un secteur de 120 Extérieurement, elle pressente une surface cylindrique, avec plusieurs rainures circulaires 10 et une gorge médiane plus importante Il recevant le lien élastique 9. Intérieurement, chaque pièce 8 possède un profil qui correspond a la partie lisse de la tige 1, dont avec une surface cylindrique prolongée par une surface conique. Each part 8 corresponds to a sector of 120 Externally, it senses a cylindrical surface, with several circular grooves 10 and a larger median groove It receives the elastic link 9. Internally, each part 8 has a profile which corresponds to the smooth part of the rod 1, of which with a cylindrical surface extended by a conical surface.
Un tube 12, formant entretoise, est enfilé autour de la tige 1, entre les trois pièces 8, d'une part, et ltécrou 2, d'autre part. Enfin une rondelle 13 se trouve de préfé- rence interposée entre l'écrou 3 et le tube 12. A tube 12, forming a spacer, is threaded around the rod 1, between the three parts 8, on the one hand, and the nut 2, on the other hand. Finally, a washer 13 is preferably interposed between the nut 3 and the tube 12.
Les figures 2 et 3 montrent le goujon précédemment décrit, dans sa position initiale ctest-à-dire avant serrage de L'écrou 3. Dans cette position, les trois pièces 8 sont appliquées contre la tige 1 au moyen du lien élastique 9, et elles arrivent contre l'épaulement 5 de ladite tige 1. L'ensemble de goujon est ainsi parfaitement cylindrique, vu extérieurement, l'élément expansible 7 prolongeant exactement le tube 12. FIGS. 2 and 3 show the stud previously described, in its initial position, that is to say before tightening of the nut 3. In this position, the three parts 8 are applied against the rod 1 by means of the elastic link 9, and they arrive against the shoulder 5 of said rod 1. The stud assembly is thus perfectly cylindrical, seen from the outside, the expandable element 7 exactly extending the tube 12.
ça figure 4 montre le même goujon, après serrage de l'écrou 3. Au cours du vissage de L'écrou 3, celui-ci pousse les trois pièces 8, par l'intermédiaire de la rondelle 13 et du tube 12. Les trois pièces 8, déplacées axialement relativement à la tige 1, "ontent1, sur le prolongement tronconique lisse 6, ce qu les oblige à s'é- carter. Ainsi l'on obtient un-ancrage efficace dans un matériau 14 tel que béton, plâtre ou autre, même très tendre. this figure 4 shows the same stud, after tightening the nut 3. During the screwing of the nut 3, it pushes the three parts 8, via the washer 13 and the tube 12. The three parts 8, moved axially relative to the rod 1, "ontent1, on the smooth frusto-conical extension 6, which forces them to move apart. This provides an effective anchoring in a material 14 such as concrete, plaster or other, even very tender.
Il est à remarquer qu'au moment de l'ancrage, lorsque 1'élément expansible 7, ayant atteint son maximum d'expansion, ne peut plus se déformer, et si l'on continue le serrage de l'écrou 3, le tube entretoise 12 se déformera sous l'effet de la pression, ce qui augmentera encore la tenue à l'arrachement du goujon. It should be noted that at the time of anchoring, when the expandable element 7, having reached its maximum expansion, can no longer deform, and if the tightening of the nut 3 is continued, the tube spacer 12 will deform under the effect of pressure, which will further increase the tear resistance of the stud.
Pour éviter toute rotation de la tige 1 pendant le temps diamorçage, celle-ci peut encore comporter, à l'ex tre'mitô libre de sa partie filetée Z, une fente 15 ou tous autres moyens de blocage en rotation. To avoid any rotation of the rod 1 during the diamonding time, the latter may also comprise, at the free end of its threaded part Z, a slot 15 or any other means of locking in rotation.
Comme il va de 80i, et comme il résulte déjà de ce qui procède, l'invention ne se limite pas à la seule forme de réalisation de ce goujon de fixation qui a été décrite ci-dessus, à titre d'exemple ; elle en embrasse, au contraire, toutes les variantes comportant des moyens équivalents. As it goes from 80i, and as already follows from what proceeds, the invention is not limited to the only embodiment of this fixing stud which has been described above, by way of example; on the contrary, it embraces all the variants comprising equivalent means.
C'est ainsi,notarment, que la division de l'élément expansible 7 en trois pièces 8 n'est évidemment pas limitative, et peut être remplacée par une division en un nombre quelconque de secteurs. Thus, in particular, the division of the expandable element 7 into three parts 8 is obviously not limiting, and can be replaced by a division into any number of sectors.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8020373A FR2490297A1 (en) | 1980-09-18 | 1980-09-18 | Anchor bolt for concrete - has expandable segments which enclose whole of unthreaded part of expander bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8020373A FR2490297A1 (en) | 1980-09-18 | 1980-09-18 | Anchor bolt for concrete - has expandable segments which enclose whole of unthreaded part of expander bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2490297A1 true FR2490297A1 (en) | 1982-03-19 |
Family
ID=9246186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8020373A Pending FR2490297A1 (en) | 1980-09-18 | 1980-09-18 | Anchor bolt for concrete - has expandable segments which enclose whole of unthreaded part of expander bolt |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2490297A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2575244A1 (en) * | 1984-12-21 | 1986-06-27 | Vanacker Yves | Removable device for anchoring to a vertical wall |
| US4602500A (en) * | 1985-08-30 | 1986-07-29 | Haskel, Inc. | Apparatus for leakage testing of tubes and joints |
| CN109416067A (en) * | 2016-06-29 | 2019-03-01 | 费希尔厂有限责任两合公司 | Tightening member |
| EP3919683A1 (en) * | 2020-06-02 | 2021-12-08 | General Dynamics European Land Systems-Bridge Systems GmbH | Connecting device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2622114A1 (en) * | 1976-05-18 | 1977-12-01 | Brueckl Technik | Fastening anchor for fixing into concrete - is pushed into concrete and tightened by expansion cone in sleeve |
-
1980
- 1980-09-18 FR FR8020373A patent/FR2490297A1/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2622114A1 (en) * | 1976-05-18 | 1977-12-01 | Brueckl Technik | Fastening anchor for fixing into concrete - is pushed into concrete and tightened by expansion cone in sleeve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2575244A1 (en) * | 1984-12-21 | 1986-06-27 | Vanacker Yves | Removable device for anchoring to a vertical wall |
| US4602500A (en) * | 1985-08-30 | 1986-07-29 | Haskel, Inc. | Apparatus for leakage testing of tubes and joints |
| CN109416067A (en) * | 2016-06-29 | 2019-03-01 | 费希尔厂有限责任两合公司 | Tightening member |
| EP3919683A1 (en) * | 2020-06-02 | 2021-12-08 | General Dynamics European Land Systems-Bridge Systems GmbH | Connecting device |
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