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FR2642801A1 - Insert designed to be installed in crumbly (brittle) materials with the aid of a screwing device - Google Patents

Insert designed to be installed in crumbly (brittle) materials with the aid of a screwing device Download PDF

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Publication number
FR2642801A1
FR2642801A1 FR8900477A FR8900477A FR2642801A1 FR 2642801 A1 FR2642801 A1 FR 2642801A1 FR 8900477 A FR8900477 A FR 8900477A FR 8900477 A FR8900477 A FR 8900477A FR 2642801 A1 FR2642801 A1 FR 2642801A1
Authority
FR
France
Prior art keywords
insert
drilling part
drilling
double thread
aid
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Withdrawn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
FR8900477A
Other languages
French (fr)
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.)
HALLOUIN JEAN
Original Assignee
HALLOUIN JEAN
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 HALLOUIN JEAN filed Critical HALLOUIN JEAN
Priority to FR8900477A priority Critical patent/FR2642801A1/en
Publication of FR2642801A1 publication Critical patent/FR2642801A1/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Withdrawn legal-status Critical Current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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing 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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dowels (AREA)

Abstract

The invention relates to a tapped, self-piercing, self-tapping insert designed to be installed with the aid of a screwing device. The insert is characterised in that it comprises a tapping 8, a collar 2, a smooth part 3, a threaded part 4, a boring part 5 and a drilling part 6. The insert is designed to be installed in a single operation, with the aid of a screwdriving machine. The drilling part 6 centres the insert. The tapping 8 is extended into the boring part 5 to allow pieces of different thicknesses to be fixed. The insert is moulded from a zinc alloy or from plastic. The insert makes it possible to obtain tappings directly without boring pilot holes.

Description

La présente invention concerne les inserts en alliage d zinc ou en plastique, destinés à outre mis en place dans des supports en matériaux friables ,pour donner par exemple des taraudages; elle crée notamment un insert qui est conçu pour être mis en place a laide dun dispositif de vissage, sans faire dFavant-trou.  The present invention relates to inserts made of zinc alloy or of plastic, intended, moreover, to be placed in supports made of brittle materials, to give, for example, internal threads; in particular, it creates an insert which is designed to be put in place using a screwing device, without making a pilot hole.

Pour se fixer dans les matériaux friables, il existe différents types d insert, qui ont une séquence d'installation assez longue: perçage du trou, mise en place de l'insert dans le trou en force, ou mise en place sans effort dans le trou et verrouillage . To be fixed in friable materials, there are different types of insert, which have a fairly long installation sequence: drilling the hole, placing the insert in the hole by force, or placing effortlessly in the hole and lock.

Suivant l'invention, le taraudage non débouchant de l'insert, qui se prolonge jusque dans la partie foreuse, est
suffisamment profond, pour accepter une vis de longueur moyenne.According to the invention, the internal thread of the insert, which extends into the drilling part, is
deep enough to accept a medium length screw.

La présente invention développe un insert simple a mette en place, pas d'avnt-trou et économique, obtenu par moulage. The present invention develops a simple insert to put in place, no hole-hole and economical, obtained by molding.

De préférence, la partie perceuse est une pointe cruciforme acérée pyramidale dont la dimension latérale est égale a la moitié de celle de la partie foreuse et dont la longueur totale est sensiblement égale à de fois la dimension latérale. Preferably, the drilling part is a sharp cruciform pyramidal point whose lateral dimension is equal to half that of the drilling part and whose total length is substantially equal to both the lateral dimension.

La dimension latérale de la partie foreuse est de préférence égale au diamètre au sommet du petit filet. Le diamètre au sommet du grand filet est de préférence egal a la longueur totale du double filetage. De préférence, le nombre de filets doit tre égal à trois pour une bonne compression du matériau.The lateral dimension of the drilling part is preferably equal to the diameter at the top of the small thread. The diameter at the top of the large thread is preferably equal to the total length of the double thread. Preferably, the number of threads must be equal to three for good compression of the material.

Ces caractéristiques permettent. un percage dans l'axe, d'enlever suffisemment de matière pour eviter un blocage lors de l'opération du taraudage, de solliciter au cisaillement et en traction un volume suffisamment important pour obtenir de bonnes caractéristiques mécaniques
De préf érence, la longueur de la partie foreuse doit entre au moins égale à l'épaisseur du matériau support, pour permettre une pose séquentielle, sans heurt de l'insert: perçage, forage taraudage.These features allow. drilling in the axis, removing enough material to avoid blockage during the tapping operation, applying sufficient shear and tension to a volume sufficient to obtain good mechanical properties
Preferably, the length of the drilling part must be at least equal to the thickness of the support material, to allow sequential, smooth placement of the insert: drilling, drilling tapping.

L'invention est représentée, a titre d'exemple non limitatif, aux dessins annexés. The invention is shown, by way of non-limiting example, in the accompanying drawings.

La fig.1 est une vue de face en élévation de l'insert.  Fig.1 is a front elevation view of the insert.

La fig.2 est une vue de droite en élévation de l'insert. Fig.2 is a right view in elevation of the insert.

La fig. est une vue en coupe suivant le plan de section de de la fig.2
La fig.4 est une vue en coupe suivant le plan de section 4-4 de la fig.2. Fig. is a sectional view along the section plane of of fig.2
Fig.4 is a sectional view along the section plane 4-4 of Fig.2.

Aux dessins annexés, Fig.l et fig.2, l'insert comprend un corps généralement cylindrique designé par (9) ayant un alésage axial filet (8) et sur son pourtour deux filetages parallèles dont l'angle au sommet de 1 un est obtu (10) et I 'autre aigu (11). A une extrémité on trouve une collerette (2) séparée de la partie filetée (4) par une partie lisse (3), ( l'autre extrémité on trouve une pointe cruciforme pyramidale (6), une partie foreuse (5)comportant deux dents (12) axialement opposées se prolongeant jusqu'au double filetage (4) qui, lui-meme, comporte une entrée en biseau (13) suivie dune entaille d dégagement (14).  In the accompanying drawings, Fig.l and Fig.2, the insert comprises a generally cylindrical body designated by (9) having an axial thread bore (8) and on its periphery two parallel threads whose angle at the top of 1 is obtuse (10) and the other acute (11). At one end there is a collar (2) separated from the threaded part (4) by a smooth part (3), (the other end there is a cruciform pyramidal point (6), a drilling part (5) comprising two teeth (12) axially opposite extending to the double thread (4) which itself has a bevel entry (13) followed by a clearance notch (14).

Dans les conditions de service, l"insert, en alliage de zinc ou en plastique doit faire séquentiellement son chemin dans les matériaux friables. Under the operating conditions, the insert, made of zinc alloy or plastic, must make its way sequentially in friable materials.

Dans un premier temps, il perce son support par simple pression à l'aide de la pointe pyramidale (18) prolongée par de nervures acérées (19) disposées en croix ,Fig.3. Les nervures, suffisamment longues, permettent un positionnement précis (pas de déviation latérale), une bonne perpendicularité de l'insert sur son support (pas de flambage) et éventuellement lors de pose de séries importantes, de positionner l'insert sur son support dn léger coup de marteau, avant sa mise en rotation. Initially, it pierces its support by simple pressure using the pyramidal point (18) extended by sharp ribs (19) arranged in a cross, Fig.3. The sufficiently long ribs allow precise positioning (no lateral deviation), good perpendicularity of the insert on its support (no buckling) and possibly when laying large series, to position the insert on its support dn light blow of hammer, before its setting in rotation.

Dans un deuxième temps, en prenant appui sur la partie perceuse 6), insert va, a l'aide de ses deux dents (12) entrainées en rotation, forer un trou d'un diamètre au moins égal au diamètre du petit filet. Les canes (15) et (16) contribuent a rejeter å l'extérieur du trou le matériau support arraché par les dents (12) et a calibrer le trou (1 , avant la mise en place proprement dite de l'insert.  In a second step, by resting on the drill part 6), the insert will, using its two teeth (12) driven in rotation, drill a hole with a diameter at least equal to the diameter of the small thread. The canes (15) and (16) contribute to rejecting outside the hole the support material torn off by the teeth (12) and to calibrate the hole (1, before the actual insertion of the insert.

Dans un troisième temps, l'insert taraude son support a l'aide de son double filetage (4) par formage d'une part, grace à la forme en biseau , obtenue par la section des filetages (10) et (11) suivant un plan (X X) perpendiculaire a l'axe de l'insert (Y V')et par enlèvement de matière d'autre part, grace à l'encoche (14) positionnée- tout de suite après que le grand filet (11) ait atteint sa cote nominale gla partie encochée représente environ un quart de filet de la circonférence du double filet
Dans un quatrième temps, la collerette (2) va venir au contact du matériau support qui a tendance a se soulever lors de 1 'opération d' insertion,d'ou un désaffîeurement.C-'est la raison pour laquelle quand on fait un avant trou on fait un chanfrein important qui absorbe le matériau refoul6.Comme les opération de forage et de formage du taraudage se suivent et ne permettent pas de faire un chanfrein de la dimension du diamètre du grand filet, on laisse en général sur l'insert, une partie lisse (3) de la dimension d'un demi-pas du double filet, ce qui permet de comprimer cet excédent de matériau, pour obtenir un bon contact de la collerette (t) avec son support ou éventuellement noyer une teste fraisée réduite. Thirdly, the insert taps its support using its double thread (4) by forming on the one hand, thanks to the bevel shape, obtained by the section of the threads (10) and (11) following a plane (XX) perpendicular to the axis of the insert (Y V ') and by removing material on the other hand, thanks to the notch (14) positioned - immediately after the large thread (11) has reached its nominal dimension gla notched part represents approximately a quarter of a thread of the circumference of the double thread
In a fourth step, the flange (2) will come into contact with the support material which tends to lift during the insertion operation, hence a disaffection. This is the reason why when a before the hole, a large chamfer is made which absorbs the repressed material. 6 As the drilling and tapping forming operations follow one another and do not make it possible to make a chamfer the size of the diameter of the large thread, we generally leave on the insert , a smooth part (3) the size of a half-pitch of the double thread, which allows this excess material to be compressed, to obtain good contact of the flange (t) with its support or possibly drown a milled test scaled down.

Claims (4)

REvENDICATIONS 1) Insert caractérisé en ce qu'il comprend un corps cylindrique creux (9) comportant intérieurement un taraudage borgne (8) se prolongeant dans la partie foreuse (5) pour recevoir un élément fileté et extérieurement un double filetage (10) et (11) se terminant en biseau (17) et présentant une encoche (14). Une partie foreuse (5) et une partie perceuse (6) prolongent d'un coté ce double filetage, une partie lisse (3) et une collerette (2), de l'autre.  1) Insert characterized in that it comprises a hollow cylindrical body (9) internally comprising a blind thread (8) extending in the drilling part (5) to receive a threaded element and externally a double thread (10) and (11 ) ending in a bevel (17) and having a notch (14). A drilling part (5) and a drilling part (6) extend on one side this double thread, a smooth part (3) and a flange (2), on the other. ) Dispositif selon la revendication (1) caractérisé en ce que la partie perceuse (6) comporte une pointe pyramidale (18).  ) Device according to claim (1) characterized in that the drilling part (6) comprises a pyramidal point (18). 3) Dispositif selon les revendications (i) et (2) caractérisé en ce que la partie perceuse (6) comporte quatre nervures acérées en forme de croix (19) dans le prolongement des faces de la pyramide (18). 3) Device according to claims (i) and (2) characterized in that the drilling part (6) comprises four sharp ribs in the shape of a cross (19) in the extension of the faces of the pyramid (18). 4) Dispositif selon les revendications (1) et (Z) caractérisé en ce que la partie foreuse (5) comporte deux dents (12) diamétralement opposées et adjacentes aux nervures(19). 4) Device according to claims (1) and (Z) characterized in that the drilling part (5) comprises two teeth (12) diametrically opposite and adjacent to the ribs (19). 5-) Dispositif selon les revendications (1) et (4) caractérié en ce que la partie foreuse (5) comporte entre ses. 5-) Device according to claims (1) and (4) characterized in that the drilling part (5) has between its. dents (12) deux parties cyniques successives ( et (13). teeth (12) two successive cynical parts (and (13). 6) Dispositif selon la revendication (1) caractérisé en ce que le double filetage (10) et (11) se termine par un biseau (17) obtenu par la section de celui-ci par un plan de coupe perpendiculaire à l'axe de l'insert.  6) Device according to claim (1) characterized in that the double thread (10) and (11) ends with a bevel (17) obtained by the section thereof by a cutting plane perpendicular to the axis of the insert. 7) Dispositif selon la revendication (i > caractérisé en ce que l'encoche (14) commence tout de suite après le biseau (17) dans l'alignement d'une des dents (12) et qu'elle intéresse un quart de la circonférence du double filet (10) et (11) 7) Device according to claim (i> characterized in that the notch (14) begins immediately after the bevel (17) in alignment with one of the teeth (12) and that it concerns a quarter of the circumference of the double thread (10) and (11) 8) Dispositif selon la revendication (1) caractérisé en ce que la partie lisse (3) est égale au moins a la moitié d'un pas du double filetage (10) et (11),  8) Device according to claim (1) characterized in that the smooth part (3) is equal to at least half a pitch of the double thread (10) and (11),
FR8900477A 1989-01-17 1989-01-17 Insert designed to be installed in crumbly (brittle) materials with the aid of a screwing device Withdrawn FR2642801A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8900477A FR2642801A1 (en) 1989-01-17 1989-01-17 Insert designed to be installed in crumbly (brittle) materials with the aid of a screwing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8900477A FR2642801A1 (en) 1989-01-17 1989-01-17 Insert designed to be installed in crumbly (brittle) materials with the aid of a screwing device

Publications (1)

Publication Number Publication Date
FR2642801A1 true FR2642801A1 (en) 1990-08-10

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FR8900477A Withdrawn FR2642801A1 (en) 1989-01-17 1989-01-17 Insert designed to be installed in crumbly (brittle) materials with the aid of a screwing device

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0494651A1 (en) * 1991-01-11 1992-07-15 RAHMEDE SCHRAUBENFABRIK GmbH & CO. KG Screw
WO1992019876A1 (en) * 1991-05-09 1992-11-12 Colis Internacional, S.A. Fixing element for plaster-board walls
US5190425A (en) * 1991-10-21 1993-03-02 Illinois Tool Works Inc. Anchor
US5308203A (en) * 1992-09-22 1994-05-03 Titan Technologies, Inc. Saw tipped anchor insert
US5413444A (en) * 1994-01-06 1995-05-09 Illinois Tool Works Inc. Self-drilling fastener
AU669986B2 (en) * 1991-05-30 1996-06-27 Louis N. Giannuzzi Improved self-drilling wall anchor
US5536121A (en) * 1992-09-22 1996-07-16 Titan Technologies, Inc. Anchor insert
EP0965767A1 (en) * 1998-06-15 1999-12-22 Poul Tillegreen Self-drilling insert
EP1072801A2 (en) * 1994-12-08 2001-01-31 Black & Decker Inc. An anchor member for friable material
US6290443B1 (en) * 1995-09-04 2001-09-18 Nakasu Denki Kabushikigaisha Insert for securing electrical conduction at connectors
WO2003084663A1 (en) 2002-04-09 2003-10-16 Jean Brunner Miniaturized sample-holder
EP1367270A1 (en) * 2002-05-30 2003-12-03 Yugenkaisha Shinjo Seisakusho Self-drilling screw
US7114902B2 (en) * 2000-05-19 2006-10-03 Pama Reiter Stefan Self-tapping bush-shaped screwed insert
US9475109B2 (en) 2013-12-31 2016-10-25 Simpson Strong-Tie Company, Inc. Method of manufacturing a hollow externally threaded fastener

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB508867A (en) * 1938-01-11 1939-07-07 Acton Bolt And Fine Threads Lt Improvements in or relating to screws and like fastening devices
FR1061883A (en) * 1951-04-28 1954-04-15 Profile nail and process for its manufacture
AU475406B2 (en) * 1973-07-18 1976-01-08 W. A. Deutsher Proprietary Limited Self drilling screws
DE3242059A1 (en) * 1981-10-05 1984-05-17 I.T.W. De France, Beauchamp, Val D'oise FASTENERS
WO1985005415A1 (en) * 1984-05-23 1985-12-05 Anders Sahlin Wood screw
WO1988003997A1 (en) * 1983-12-23 1988-06-02 Horst Brandt Fast tapping screw

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB508867A (en) * 1938-01-11 1939-07-07 Acton Bolt And Fine Threads Lt Improvements in or relating to screws and like fastening devices
FR1061883A (en) * 1951-04-28 1954-04-15 Profile nail and process for its manufacture
AU475406B2 (en) * 1973-07-18 1976-01-08 W. A. Deutsher Proprietary Limited Self drilling screws
DE3242059A1 (en) * 1981-10-05 1984-05-17 I.T.W. De France, Beauchamp, Val D'oise FASTENERS
WO1988003997A1 (en) * 1983-12-23 1988-06-02 Horst Brandt Fast tapping screw
WO1985005415A1 (en) * 1984-05-23 1985-12-05 Anders Sahlin Wood screw

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0494651A1 (en) * 1991-01-11 1992-07-15 RAHMEDE SCHRAUBENFABRIK GmbH & CO. KG Screw
WO1992019876A1 (en) * 1991-05-09 1992-11-12 Colis Internacional, S.A. Fixing element for plaster-board walls
AU669986B2 (en) * 1991-05-30 1996-06-27 Louis N. Giannuzzi Improved self-drilling wall anchor
US5190425A (en) * 1991-10-21 1993-03-02 Illinois Tool Works Inc. Anchor
EP0539139A1 (en) * 1991-10-21 1993-04-28 Illinois Tool Works Inc. Anchor
US5536121A (en) * 1992-09-22 1996-07-16 Titan Technologies, Inc. Anchor insert
US5529449A (en) * 1992-09-22 1996-06-25 Titan Technologies, Inc. Saw tipped anchor insert
US5308203A (en) * 1992-09-22 1994-05-03 Titan Technologies, Inc. Saw tipped anchor insert
ES2122836A1 (en) * 1992-09-22 1998-12-16 Mcsherry Thomas W Saw tipped anchor insert
US5413444A (en) * 1994-01-06 1995-05-09 Illinois Tool Works Inc. Self-drilling fastener
EP1072801A2 (en) * 1994-12-08 2001-01-31 Black & Decker Inc. An anchor member for friable material
EP1072801A3 (en) * 1994-12-08 2001-05-02 Black & Decker Inc. An anchor member for friable material
US6290443B1 (en) * 1995-09-04 2001-09-18 Nakasu Denki Kabushikigaisha Insert for securing electrical conduction at connectors
EP0965767A1 (en) * 1998-06-15 1999-12-22 Poul Tillegreen Self-drilling insert
US7114902B2 (en) * 2000-05-19 2006-10-03 Pama Reiter Stefan Self-tapping bush-shaped screwed insert
WO2003084663A1 (en) 2002-04-09 2003-10-16 Jean Brunner Miniaturized sample-holder
EP1367270A1 (en) * 2002-05-30 2003-12-03 Yugenkaisha Shinjo Seisakusho Self-drilling screw
US9475109B2 (en) 2013-12-31 2016-10-25 Simpson Strong-Tie Company, Inc. Method of manufacturing a hollow externally threaded fastener

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