FR2838485A1 - DOUBLE HEAD ANCHOR SCREW AND THREADED THREADS WITH DIFFERENT THREAD DEPTHS - Google Patents

DOUBLE HEAD ANCHOR SCREW AND THREADED THREADS WITH DIFFERENT THREAD DEPTHS Download PDF

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Publication number
FR2838485A1
FR2838485A1 FR0302709A FR0302709A FR2838485A1 FR 2838485 A1 FR2838485 A1 FR 2838485A1 FR 0302709 A FR0302709 A FR 0302709A FR 0302709 A FR0302709 A FR 0302709A FR 2838485 A1 FR2838485 A1 FR 2838485A1
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France
Prior art keywords
screw
threads
bolt
different thread
triple
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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.)
Granted
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FR0302709A
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French (fr)
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FR2838485B1 (en
Inventor
Pan Ching Huang
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Joker Industrial Co Ltd
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Joker Industrial Co Ltd
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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
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
    • F16B5/0275—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread the screw-threaded element having at least two axially separated threaded portions
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0026—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a hard non-organic material, e.g. stone, concrete or drywall
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0057—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0068—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw with multiple-threads, e.g. a double thread screws
    • 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
    • F16B33/00—Features common to bolt and nut
    • F16B33/02—Shape of thread; Special thread-forms
    • 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
    • F16B13/002—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose self-cutting

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Finishing Walls (AREA)

Abstract

Vis d'ancrage (3) à double tête et triples filets ayant des profondeurs de filets différentes, comprenant principalement une embase polygonale (31) (ou une cavité polygonale) formée sur la vis pour servir à la fixation. La vis a une partie supérieure et une partie inférieure formant respectivement deux boulons (32, 33) qui ont des caractéristiques de filetages différentes. L'un des boulons (33) a au moins des triples filetages (331, 332, 333) équidistants les uns des autres. Les triples filetages (331, 332, 333) ont des profondeurs de filets différentes. Ainsi, le boulon (33) à triples filets (331, 332, 333) peut assurer une fonction efficace d'équilibre lorsqu'il est fixé dans le trou percé afin de maintenir une fixation solide sans se mettre en biais. Les filetages à profondeurs de filets différentes peuvent également recueillir des débris de ciment extraits lors de la fixation de la vis dans le trou pour produire un plus grand effet de fixation. Comme il ne se produit pas de déploiement, le mur ou le panneau ne se fissure pas. Par conséquent, l'intervalle entre les trous de construction peut être réduit et le nombre de trous par unité de surface ménagés dans le mur ou le panneau peut être efficacement accru. La vis d'ancrage selon l'invention peut également être retirée d'une manière simple et commode pour faciliter le travail.Double-headed, triple-threaded anchor screw (3) having different thread depths, mainly comprising a polygonal base (31) (or polygonal cavity) formed on the screw for use in fixing. The screw has an upper part and a lower part respectively forming two bolts (32, 33) which have different thread characteristics. One of the bolts (33) has at least triple threads (331, 332, 333) equidistant from each other. Triple threads (331, 332, 333) have different thread depths. Thus, the triple-threaded bolt (33) (331, 332, 333) can perform an effective balancing function when fixed in the drilled hole in order to maintain a strong attachment without getting at an angle. Threads at different thread depths can also collect cement debris extracted when securing the screw in the hole to produce a greater securing effect. Since there is no deployment, the wall or panel will not crack. Therefore, the interval between building holes can be reduced and the number of holes per unit area made in the wall or panel can be effectively increased. The anchor screw according to the invention can also be removed in a simple and convenient way to facilitate the work.

Description

pression de serrage suivant un axe orthogonal.clamping pressure along an orthogonal axis.

VIS D'ANCRAGE A DOUBLE TETE ET A TRIPLES FILETAGES  DOUBLE HEAD ANCHOR SCREW AND TRIPLE THREAD

A PROFONDEURS DE FILETS DIFFERENTESA DEPTH OF DIFFERENT NETS

L' invention est relative à une vis d'ancrage qui possède une double tête et un triple filetage à profondeurs de filets différentes et en particulier à une vis d'ancrage à double tête pour fixation sur des murs en ciment (ou autres panneaux de construction). En référence à la Fig. 1, un procédé classique pour monter ou suspendre des objets sur un mur 1 en ciment (ou sur d'autres panneaux de construction) consiste généralement à percer un trou 11 pour y fixer une vis d'expansion, puis à installer un boulon dans celle-ci pour monter ou suspendre un article ou objet voulu. Un tel procédé de montage pose de nombreux problèmes, notamment: 1. l'ancrage de la vis d'expansion 2 nocessite l'utilisation d'une pince ou d'un outil spécial pour tirer l'extrémité avant conique 211 du boulon 21 pour déployer la cheville 22 afin qu'elle appuie fermement contre le trou 11. Le mur en ciment a tendance à se fissurer pendant le déploiement. I1 s'agit d'un gros  The invention relates to an anchor screw which has a double head and a triple thread at different thread depths and in particular to a double head anchor screw for fixing on cement walls (or other construction panels). ). With reference to FIG. 1, a conventional method for mounting or hanging objects on a wall 1 of cement (or other building boards) is generally to drill a hole 11 to attach an expansion screw, and then to install a bolt in the to mount or suspend an article or object. Such a mounting method poses many problems, including: 1. anchoring the expansion screw 2 requires the use of a pliers or a special tool to pull the tapered front end 211 of the bolt 21 to deploy the ankle 22 so that it presses firmly against the hole 11. The cement wall tends to crack during deployment. This is a big

inconvénient de l'utilisation de ce type de vis d'expansion.  disadvantage of using this type of expansion screw.

2. L'installation de la vis d'expansion 2 nécessite une pince ou un  2. The installation of the expansion screw 2 requires a clamp or a

outil spécial et rend le travail malcommode.  special tool and makes the job awkward.

3. Une fois que la vis d'expansion 2 est installée et ancrée dans le  3. Once the expansion screw 2 is installed and anchored in the

trou 11, elle est très difficile à retirer.  hole 11, it is very difficult to remove.

4. Comme la vis d'expansion 2 a tendance à provoquer la fissuration du mur en ciment autour du trou, les trous doivent étre plus espacés, en particulier dans les angles des murs. De ce fait, le nombre de trous par unité de surface de mur est limité, et la force de liaison entre le mur et les panneaux s'en ressent, et le nombre d'articles ou d'objets pouvant étre supportés ou suspendus est limité. Compte tenu des inconvénients évoqués ci-dessus, l'invention vise principalement à réaliser une vis d'ancrage perfectionnée comportant une embase polygonale (ou une cavité polygonale) servant à la fixation et un boulon comportant une partie supérieure et une partie inférieure présentant respectivement des filetages à caractéristiques différentes. L'une des parties du boulon comporte au moins trois filetages différents formés de manière équidistante sur celle-ci pour ainsi se fixer solidement dans le mur ou le panneau sans se mettre en biais, et les différents filetages ont des profondeurs de filets différentes pour recevoir des détris de ciment produits pendant les opérations d'installation et d'extraction, ce qui crce un plus grand effet de fixation. Comme il ne se produit pas de déploiement, le mur ou le panneau ne se fissure pas et les trous peuvent être plus rapprochés les uns des autres. De la sorte, les zones non utilisables pour l'accrochage aux abords des angles du mur peuvent être réduites, et le nombre de trous par unité de surface peut étre accru. La vis d'ancrage selon l'invention peut également être retirée facilement et commodément  4. Since the expansion screw 2 tends to cause the cement wall to crack around the hole, the holes should be spaced further apart, especially in the corners of the walls. As a result, the number of holes per unit wall area is limited, and the bond strength between the wall and the panels is affected, and the number of items or objects that can be supported or suspended is limited. . In view of the drawbacks mentioned above, the main object of the invention is to provide an improved anchoring screw comprising a polygonal base (or a polygonal cavity) serving for fixing and a bolt comprising an upper part and a lower part presenting, respectively, threads with different characteristics. One of the bolt portions has at least three different threads equidistantly formed thereon to thereby securely attach to the wall or panel without skewing, and the different threads have different thread depths to receive. Cement chips produced during the installation and extraction operations, resulting in a greater fastening effect. Since there is no deployment, the wall or panel will not crack and the holes may be closer to each other. In this way, non-usable areas for hanging around the corners of the wall can be reduced, and the number of holes per unit area can be increased. The anchoring screw according to the invention can also be removed easily and conveniently

pour faciliter le travail.to facilitate the work.

L'invention et nombre des avantages qui s'y attachent apparâîtront  The invention and many of the advantages attached thereto will appear

facilement plus clairement en rétérence à la description détaillée ciaprès, faite en  easily more clearly in response to the detailed description below, made in

considération des dessins annexés, sur lesquels: la Fig. 1 est une vue schématique d'une vis d' expansion selon la technique antérieure en position d'utilisation; la Fig. 2 est une vue en perspective de l'invention; la Fig. 3 est une vue en coupe de l'invention; la Fig. 4 est une coupe transversale selon la Fig. 3; la Fig. 5 est une vue schématique de l'invention en position d'utilisation; la Fig. 6 est une vue en perspective d'une anke forme de réalisation de l'invention; la Fig. 7 est une vue schématique d'une autre forme de réalisation de l'invention en position d'utilisation; la Fig. 8 est une vue en perspective d'encore une autre forme de réalisation de l'invention; et la Fig. 9 est une vue s chématique d' encore une autre forme de  consideration of the accompanying drawings, in which: FIG. 1 is a schematic view of an expansion screw according to the prior art in use position; FIG. 2 is a perspective view of the invention; FIG. 3 is a sectional view of the invention; FIG. 4 is a cross-section according to FIG. 3; FIG. 5 is a schematic view of the invention in use position; FIG. 6 is a perspective view of an embodiment of the invention; FIG. 7 is a schematic view of another embodiment of the invention in use position; FIG. 8 is a perspective view of yet another embodiment of the invention; and FIG. 9 is a schematic view of yet another form of

réalisation de l'invention en position d'utilisation.  embodiment of the invention in use position.

Considérant les figures 2 et 3, la vis 3 selon l'invention comprend principalement une embase polygonale 31 servant à la fixation (l'embase peut être serrce à l'aide d'une clé ordinaire pour faire tourner et fixer la vis). La tige de la vis 3 3 5 comporte une partie supérieure et une partie inférieure servant à former respectivement un boulon supérieur 32 et un boulon inférieur 33 qui ont respectivement des fletages à caractéristiques différentes. L'embase polygonale 31 peut se trouver entre le boulon supérieur 32 et le boulon inférieur 33. Le boulon inférieur 33 a trois filetages différents 331, 332 et 333 formés sur celui-ci (les filetages peuvent être au nombre de trois, de cinq ou analogue) de façon que chaque pas réel soit trois fois plus grand que le pas apparent (cela concerne la forme de réalisation à triples filets). De plus, les arêtes 3310, 3320 et 3330 des filets des filetages 331, 332 et 333 ont des hauteurs (également appelées profondeurs de filets) respectivement différentes hl, h2 et h3. Donc, lorsque le boulon inférieur 33 est fixé dans un trou 11 percé dans un mur en ciment (comme représenté sur la Fig. 5), les trois filetages 331, 332 et 333 sont espacés les uns des autres de manière équidistante (en référence à l'exemple de foTme de réalisation à triples filets, consulter également la Fig. 4), et les filetages 331, 332 et 333 sont mutuellement disposés à intervalle angulaire de 120 degrés. En coupe transversale, il y a trois tangentes équidistantes aux filetages, ce qui permet d'obtenir un effet d'équilibre pour maintenir le boulon en position ferme, sans qu'il ne se mette en biais. De plus, comme les hauteurs hl, h2 et h3 des arétes 3310, 3320 et 3330 des filets des filetages 331, 332 et 333 sont différentes, lorsque les arêtes 3310, 3320 et 3330 des filets sont fixces dans le trou 11 (un trou général 11 a un diamètre D1 intermédiaire entre le petit diamètre D du boulon inférieur 3 et le diamètre extérieur de la plus petite hauteur hl, c'est-à-dire D < D1 + 2 hl), les arêtes des filets peuvent recueillir les débris de ciment extraits pour obtenir un plus grand effet de fixation. En outre, comme il n'y a pas de déploiement, le mur ou le panneau ne se fissure pas. L'intervalle entre les trous percés peut donc être réduit. Par conséquent, les zones non utilisables pour l'ancrage à proximité des angles du mur peuvent être réduites et le nombre de trous percés peut être accru par unité de surface. La vis d'ancrage selon l'invention peut également être  Referring to Figures 2 and 3, the screw 3 according to the invention mainly comprises a polygonal base 31 for fixing (the base can be tightened with an ordinary key to rotate and fix the screw). The rod of the screw 3 comprises a top portion and a bottom portion for forming respectively an upper bolt 32 and a lower bolt 33 which respectively have different characteristics of flutings. The polygonal base 31 can be between the upper bolt 32 and the lower bolt 33. The lower bolt 33 has three different threads 331, 332 and 333 formed on it (the threads can be three, five or analog) so that each real step is three times larger than the apparent pitch (this concerns the triple threaded embodiment). In addition, the threads 3310, 3320 and 3330 of the threads 331, 332 and 333 have different heights (also called net depths) h1, h2 and h3 respectively. Thus, when the lower bolt 33 is secured in a hole 11 drilled in a cement wall (as shown in Fig. 5), the three threads 331, 332 and 333 are spaced from each other equidistantly (with reference to the example of a triple-threaded embodiment, see also Fig. 4), and the threads 331, 332 and 333 are mutually disposed at 120 degree angular intervals. In cross-section, there are three equidistant tangents to the threads, which allows to obtain an equilibrium effect to maintain the bolt in a firm position, without it being placed at an angle. In addition, since the heights h1, h2 and h3 of the edges 3310, 3320 and 3330 of the threads of the threads 331, 332 and 333 are different, when the edges 3310, 3320 and 3330 of the threads are fixed in the hole 11 (a general hole 11 has a diameter D1 intermediate between the small diameter D of the lower bolt 3 and the outer diameter of the smaller height hl, that is to say D <D1 + 2 hl), the edges of the nets can collect the debris of cement extracts to obtain a greater fixing effect. In addition, as there is no deployment, the wall or panel does not crack. The gap between the drilled holes can therefore be reduced. As a result, areas that can not be used for anchoring near the corners of the wall can be reduced and the number of drilled holes increased per unit area. The anchoring screw according to the invention can also be

retirée facilement et commodément pour faciliter le travail.  removed easily and conveniently to make the job easier.

On se reportera aux figures 6 et 7 qui illustrent une autre forme de ré al i s ati o n de l ' invention. La vi s 4 co mprend une partie sup érieure et une p arti e inférieure qui forment respectivement un boulon supérieur 42 et un boulon inférieur 43 ayant des caractéristiques de filetages différentes. Le boulon inférieur 3 possède des triples filets avec des hauteurs d'arétes différentes (comme dans le cas de la forme de réalisation représentée sur la Fig. 2). Cependant, l'embase polygonale 41 qui sert à la fixation se trouve à l'extrémité supérieure du boulon supérieur 42 (c'est à-dire le boulon visible à l'extérieur du trou, et l'embase polygonale 41 a un diamètre extérieur plus petit que le diamètre du boulon supérieur 42 pour permettre un  Reference is made to FIGS. 6 and 7 which illustrate another embodiment of the invention. The frame 4 comprises an upper portion and a lower portion which respectively form an upper bolt 42 and a lower bolt 43 having different threading characteristics. The lower bolt 3 has triple threads with different edge heights (as in the case of the embodiment shown in Fig. 2). However, the polygonal base 41 which serves for fixing is at the upper end of the upper bolt 42 (that is to say the bolt visible outside the hole, and the polygonal base 41 has an outside diameter smaller than the diameter of the upper bolt 42 to allow a

montage sans difficulté d'objets extérieurs sur le boulon supérieur 42).  easy mounting of external objects on the upper bolt 42).

On se reportera aux figures 8 et 9 qui illustrent encore une autre forme de réalisati on de l'invention. La vis S comporte une partie sup érieure et une partie inférieure qui forment respectivement un boulon supérieur 52 et un boulon inférieur 53 ayant des caractéristiques de filetages différentes. Le boulon inférieur 3 comporte des triples filets avec des hauteurs d'arétes différentes (comme dans le cas de la forme de réalisation représentée sur la Fig. 2). Cependant, l'embase polygonale de fixation est remplacée par une cavité polygonale S1 ménagée à l'extrémité supérieure du boulon supérieur 52, dans laquelle peut s'engager une clé  Reference is made to FIGS. 8 and 9 which further illustrate another embodiment of the invention. The screw S has an upper portion and a lower portion which respectively form an upper bolt 52 and a lower bolt 53 having different thread characteristics. The lower bolt 3 has triple threads with different edge heights (as in the case of the embodiment shown in Fig. 2). However, the polygonal attachment base is replaced by a polygonal cavity S1 formed at the upper end of the upper bolt 52, in which a key can engage.

correspondante pour réaliser une fixation.  corresponding to achieve a fixation.

A l'aide de la construction présentée ci-dessus, la vis selon l'invention peut étre actionnée et fixée à l'aide d'une clé ordinaire, sans utiliser d'outils spéciaux, et la vis peut être solidement fixée et accrochée sans se mettre en biais. La vis selon l'invention peut également recucillir des débris de ciment afn d'obtenir un plus grand effet de fixation. Comme il n'y a pas de déploiement lors de l'installation de l'invention, il est possible d'éviter la fissuration des murs ou des panneaux qui risquerait autrement de se produire. La vis selon l' invention est également facile à retirer lorsqu'on le souhaite. Tout cela apporte d'importantes  Using the construction shown above, the screw according to the invention can be actuated and fixed with an ordinary wrench, without the use of special tools, and the screw can be securely fixed and hung without to put oneself at an angle. The screw according to the invention can also recoil cement debris in order to obtain a greater fixing effect. Since there is no deployment during the installation of the invention, it is possible to avoid cracking walls or panels that might otherwise occur. The screw according to the invention is also easy to remove when desired. All this brings important

améliorations et de plus grands avantages.  improvements and greater benefits.

ss

Claims (4)

Revendicationsclaims 1. Vis d'ancrage (3) à double tête et triples filetages à profondeurs de filets différentes, comprenant: une embase polygonale de fixation (31); et une partie supérieure et une partie inférieure servant à former respectivement un boulon supérieur (32) et un boulon inférieur (33) sur lesquels sont respectivement formés des filetages à caractéristiques différentes; caractérisée en ce qu'un (33) des boulons comporte au moins des triples fletages (331, 332, 333) formés de manière équidistante sur celui-ci, les  Anchoring screw (3) with double head and triple threads at different thread depths, comprising: a polygonal attachment base (31); and an upper portion and a lower portion for respectively forming an upper bolt (32) and a lower bolt (33) on which threads of different characteristics are respectively formed; characterized in that one (33) of the bolts comprises at least triple flutings (331, 332, 333) formed equidistantly thereon, triples filetages ayant des profondeurs de filets différentes.  triple threads having different thread depths. 2. Vis d'ancrage (3) selon la revendication 1, caractérisée en ce que l'embase polygonale se trouve dans une partie médiane de la vis (3) entre le boulon  2. Anchor screw (3) according to claim 1, characterized in that the polygonal base is in a central portion of the screw (3) between the bolt supérieur (32) et le boulon inférieur (33).  upper (32) and the lower bolt (33). 3. Vis d'ancrage (3) selon la revendication 1, caractérisce en ce que l'embase polygonale (41) se trouve à une extrémité supérieure d'un boulon (42)  Anchoring bolt (3) according to claim 1, characterized in that the polygonal base (41) is at an upper end of a bolt (42). visible à l'extérieur d'un trou percé dans un mur.  visible outside a hole drilled in a wall. 4. Vis d'ancrage (3) selon la revendication 1, caractérisée en ce que l'extrémité supérieure visible d'un boulon (51) à l'extérieur d'un kou percé dans un mur comporte une cavité polygonale (51) ménagée dans celleci pour que s'y engage  4. anchoring screw (3) according to claim 1, characterized in that the visible upper end of a bolt (51) outside a kou drilled in a wall comprises a polygonal cavity (51) arranged in this to engage
FR0302709A 2002-04-11 2003-03-05 DOUBLE HEAD ANCHOR SCREW WITH THREADED THREADS WITH DIFFERENT THREAD DEPTHS Expired - Fee Related FR2838485B1 (en)

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CN02231015.0U CN2545415Y (en) 2002-04-11 2002-04-11 Three-spiral thread two-end fixing screw with different heights of thread

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FR2838485A1 true FR2838485A1 (en) 2003-10-17
FR2838485B1 FR2838485B1 (en) 2005-04-15

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CN (1) CN2545415Y (en)
ES (1) ES2234380B1 (en)
FR (1) FR2838485B1 (en)
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FR3038354A1 (en) * 2015-07-03 2017-01-06 Sarl Francois Inglese PITCH OF SUSPENSION
EP4187115A1 (en) * 2021-11-30 2023-05-31 François Inglese Improved suspension dowel

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CN104747562A (en) * 2014-07-28 2015-07-01 李莹 Stainless steel anti-corrosion double-end bolt
CN105422583A (en) * 2015-12-17 2016-03-23 罗景彬 Three-tooth-head bolt
CN106855076A (en) * 2017-01-10 2017-06-16 宝鸡文理学院 The multi-thread new-type screw thread of compound tooth form
CN111810507B (en) * 2020-06-29 2021-10-22 北京汽车集团越野车有限公司 Dowel pin assembly, manufacturing method and manufacturing device

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FR3038354A1 (en) * 2015-07-03 2017-01-06 Sarl Francois Inglese PITCH OF SUSPENSION
EP4187115A1 (en) * 2021-11-30 2023-05-31 François Inglese Improved suspension dowel
FR3129694A1 (en) * 2021-11-30 2023-06-02 Francois Inglese Improved suspension eyebolt

Also Published As

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ITMI20022683A1 (en) 2003-10-12
FR2838485B1 (en) 2005-04-15
GB0226838D0 (en) 2002-12-24
GB2387421B (en) 2004-02-18
ES2234380B1 (en) 2006-04-16
ES2234380A1 (en) 2005-06-16
CN2545415Y (en) 2003-04-16
GB2387421A (en) 2003-10-15

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