FR2880573A1

FR2880573A1 - Dowel pin extracting device for hollow material, has nut cylinder reversed by pressure exerted on it by piston moving inside tip cylinder by simultaneous application of two antagonistic forces exerted on piston and holder

Info

Publication number: FR2880573A1
Application number: FR0500204A
Authority: FR
Inventors: Charles Mistretta
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-01-10
Filing date: 2005-01-10
Publication date: 2006-07-14
Anticipated expiration: 2025-01-10
Also published as: FR2880573B1

Abstract

The device has a hook-holder with hooks (2) having fastening points (7) supporting under a tip cylinder (3) of a dowel pin, between legs (6) of the pin, in a restricted space between the cylinder (3) and nut cylinder (4). The cylinder (4) is reversed by the pressure exerted on it by a piston (10) moving inside the cylinder (3) by simultaneous application of two antagonistic forces exerted on the piston and holder.

Description

1 La présente invention a pour objet l'extraction des chevilles dites " àThe subject of the present invention is the extraction of the pins known as

expansion" dont le principe repose sur 1'enserrement d'un support de fixation de faible épaisseur entre une couronne à l'avant et un certain nombre de pattes solidaires d'un cylindre à l'arrière. expansion "whose principle is based on the enforce ment of a thin mounting bracket between a crown at the front and a number of lugs integral with a cylinder at the rear.

Elle autorise leur récupération et leur réutiilisation si elles n'ont fait l'objet d'aucune détérioration au moment de leur pose. It allows their recovery and reuse if they have not been damaged at the time of installation.

Aucun procédé actuellement ne permet d'extraire en douceur ce type de cheville. L'une des rares possibilités, consiste à désolidariser la couronne et à faire basculer vers l'arrière du support le reste de la cheville, avec toute les conséquences destructrices que cette opération occasionne habituellement. No method currently can gently extract this type of ankle. One of the few possibilities is to separate the crown and tilt the rest of the ankle towards the back of the ankle, with all the destructive consequences that this operation usually causes.

Le procédé vise dans un premier temps à repousser le cylindre d'écrou (4) vers l'arrière et à extraire ensuite la cheville du support sur lequel elle est fixée. The method aims first to push the nut cylinder (4) backwards and then extract the peg of the support on which it is fixed.

RECUL DU CYLINDRE D'ECROU ACCROCHAGE A LA BASE DU CYLINDRE DE TËTE. PORTE-CROCHET A CROCHET UNIQUE OU A PLURALITE I)E CROCHETS (Pl. 1/6, 2/6, 3/6, 4/6). NARROW CYLINDER RETRACTION ATTACHING TO HEAD CYLINDER BASE. CROCHET HOOK WITH SINGLE HOOK OR PLURALITY I) HOOKS (Pl 1/6, 2/6, 3/6, 4/6).

Le ou les crochets (2) filiformes (ou autre) d'un porte-crochet (1) solidaires des éléments de ce dernier, le col (9) ainsi que le corps (8), prennent appui à la base du cylindre de tête (3) entre les pattes (6) de la cheville, dans l'espace restreint (17) compris entre le cylindre de tête (3) et le cylindre d'écrou (4). The hook or hooks (2) filiform (or other) of a hook holder (1) integral elements of the latter, the neck (9) and the body (8), bear against the base of the head cylinder (3) between the lugs (6) of the dowel, in the restricted space (17) between the head cylinder (3) and the nut cylinder (4).

L'opération de mise en place des crochets, faite généralement sans visibilité, ne pose 20 aucune difficulté majeure. The operation of setting up the hooks, generally made without visibility, poses no major difficulty.

Dans le cas d'une pluralité de crochets, leur introduction dans le cylindre de tête (3) se fait par pincement des crochets jusqu'à leur croisement. Dans leur position croisée les pointes d'accroches (7) occupent alors un espace dont la longueur et la largeur est inférieure à la surface d'introduction de la couronne (5). In the case of a plurality of hooks, their introduction into the head cylinder (3) is by pinching the hooks to their crossing. In their crossed position the hooks (7) then occupy a space whose length and width is less than the insertion surface of the crown (5).

Une fois à l'intérieur du cylindre de tête (3) et après que le pincement ait cessé, la flexibilité des crochets (2) tend à ramener les pointes d'accroches (7) vers l'extérieur. Cette tendance, contenue à l'intérieur du cylindre de tête, pousse les pointes à venir se loger entre les pattes (6) de la cheville dans l'espace (17) compris entre les deux cylindres (3) et (4), lorsqu'elles sont amenées sous le cylindre de tête (3) par l'opérateur. Once inside the head cylinder (3) and after the pinching has ceased, the flexibility of the hooks (2) tends to bring the hooks (7) outward. This tendency, contained inside the head cylinder, pushes the tips to be housed between the legs (6) of the ankle in the space (17) between the two cylinders (3) and (4), when they are brought under the head cylinder (3) by the operator.

La solidarité des crochets (2) avec les autres éléments du porte- crochet (1) avant introduction dans le cylindre de tête (3), n'est pas obligatoire. Les crochets peuvent être introduits tour à tour "à l'aveugle" dans le cylindre (3), et être joints après coup aux éléments (8) et (9) du porte-crochet (1). The solidarity of the hooks (2) with the other elements of the hook holder (1) before introduction into the head cylinder (3), is not mandatory. The hooks can be introduced in turn "blind" into the cylinder (3), and be joined afterwards to the elements (8) and (9) of the hook holder (1).

Après que la ou les pointes d'accroche (7) aient été placées sous le cylindre de tête, entre les pattes (6) de la cheville, un piston (10) est introduit dans le corps (8) du porte-crochet (1). Une ou plusieurs rainures (11) creusées à la surface de ce piston, permettent le passage de celui-ci qui peut ainsi être amené en butée jusqu'au cylindre d'écrou (4) malgré la présence des crochets (2). After the one or more attachment points (7) have been placed under the head cylinder, between the lugs (6) of the dowel, a piston (10) is introduced into the body (8) of the hook holder (1). ). One or more grooves (11) dug on the surface of this piston, allow the passage thereof, which can be brought into abutment to the nut cylinder (4) despite the presence of the hooks (2).

La ou les pointes d'accroches glissées sous la base du cylindre de tête et prisonnières 40 dans la ou les rainures du piston, n'ont aucune possibilité de retrait. Elles constituent une prise d'appui forte et stable pour une action sur le cylindre d'écrou. The hook point or points slid under the base of the head cylinder and trapped 40 in the groove or grooves of the piston, have no possibility of withdrawal. They constitute a strong and stable support for an action on the cylinder of nut.

La venue en butée du piston sur le cylindre d'écrou est inévitable étant donné que le diamètre de l'ouverture de la couronne (5) est toujours supérieur au diamètre d'écrou (à la condition que le diamètre du piston soit le plus proche possible de celui de l'ouverture de la couronne). The abutment of the piston on the nut cylinder is inevitable since the diameter of the opening of the ring (5) is always greater than the nut diameter (provided that the diameter of the piston is the closest possible of that of the opening of the crown).

Il n'est pas nécessaire que le ou les crochets passent par l'intérieur du corps (8) du porte-crochet (1), un passage par l'extérieur conviendrait de même (Fig. 8). It is not necessary for the hook or hooks to pass through the inside of the body (8) of the hook holder (1), an outside passage would be the same (Fig. 8).

Le piston est pourvu à son sommet d'un filetage (12) sur lequel est vissé une molette. The piston is provided at its top with a thread (12) on which is screwed a knob.

Une pression simultanée et antagoniste sur le piston au niveau de la molette(13) ainsi que sur la partie inférieure du col (9) du portecrochet (1) (fixé à la base du cylindre de tête (3) via les crochets) met le piston (10) en mouvement. Simultaneous and opposing pressure on the piston at the wheel (13) and at the lower part of the neck (9) of the portecrochet (1) (fixed to the base of the head cylinder (3) via the hooks) puts the piston (10) in motion.

La poussée de ce dernier déforme les pattes (6) de la cheville et repousse le cylindre d'écrou (4) vers sa position d'origine. The thrust of the latter deforms the legs (6) of the ankle and pushes the nut cylinder (4) to its original position.

La molette(13) peut être remplacée par tout autre élément d'appui placé sur le piston. The knob (13) can be replaced by any other support element placed on the piston.

ACCROCHAGE SOUS COURONNE DU CYLINDRE DE TETE (COLLERETTE). PORTE- CROCHETS A TIGES DE CROCHETS DE SECTION SEMICYLINDRIQUES (Pl. 5/6) OU DE TOUTE AUTRE FORME Une grande partie des chevilles du type évoqué supra ont une couronne (5) dont le diamètre intérieur est inférieur au diamètre intérieur du cylindre de tête (3) de la cheville. La plupart de ces couronnes ont leur partie interne repoussée (14) (partie en limite du plus petit cercle) qui pénètre dans le cylindre de tête. ATTACHMENT UNDER CROWN OF HEAD CYLINDER (FLANGE). HOOK HOLDER WITH HOOKS OF SEMICYLINDRICAL SECTION HOOKS (Pl. 5/6) OR ANY OTHER FORM A large part of the pegs of the type mentioned above have a ring gear (5) whose internal diameter is smaller than the inside diameter of the head cylinder (3) ankle. Most of these crowns have their internal part pushed back (14) (part in boundary of the smallest circle) which enters the cylinder of head.

C'est sous cette partie de la couronne repoussée ou non, correspondant à la différence des diamètres intérieurs du cylindre de tête et de la couronne, que les éléments d'accrochage (15) et (16) du porte-crochet (1) sont placés pour prendre appui. It is under this part of the crown that is repelled or not, corresponding to the difference in the inner diameters of the head cylinder and the crown, that the hooking elements (15) and (16) of the hook holder (1) are placed to take support.

Ces éléments d'accrochage sont constitués par des parties saillantes (15), faites ou placées à l'extrémité des tiges de crochets de section semi cylindrique (16), plate ou de toute autre forme. These hooking elements are constituted by projecting parts (15), made or placed at the end of the hook rods of semi-cylindrical section (16), flat or any other form.

En l'absence du piston (18), (19) ou (25), le pincement des tiges de crochet (16) jusqu'à ce que leurs extrémités se touchent, permet l'introduction des parties saillantes (15) dans le cylindre de tête (3) et leur positionnement sous la couronne (5) de la cheville. In the absence of the piston (18), (19) or (25), the pinching of the hook rods (16) until their ends meet, allows the introduction of the projections (15) in the cylinder head (3) and their positioning under the crown (5) of the ankle.

La somme des épaisseurs des crochets à leur extrémité (parties saillantes comprises) doit être inférieure au diamètre interne de la couronne pour que le passage soit possible. The sum of the thicknesses of the hooks at their end (including projections) must be smaller than the internal diameter of the crown for the passage to be possible.

Dans le cas d'un porte-crochet à deux crochets, la largeur de ces derniers au niveau de leur extrémité, ne doit pas dépasser une certaine valeur "L" qui est fonction du diamètre de la couronne. In the case of a hook holder with two hooks, the width of the latter at their end, must not exceed a certain value "L" which is a function of the diameter of the crown.

Lorsque le pincement cesse, la flexibilité des tiges de crochet (16) ramène les parties saillantes (15) contre les parois internes du cylindre de tête (3), et les saillies d'extrémité peuvent buter sous la couronne (5). When the nip stops, the flexibility of the hook rods (16) brings the protrusions (15) back against the inner walls of the head cylinder (3), and the end projections can abut under the crown (5).

A l'intérieur du cylindre de tête (3) l'introduction du piston (18) , (19) ou (25), maintient sous la couronne (collerette), les parties saillantes (15) plaquées contre la paroi du cylindre (3), sans aucune possibilité de retrait. Inside the head cylinder (3) the insertion of the piston (18), (19) or (25), maintains under the crown (flange), the projecting parts (15) pressed against the wall of the cylinder (3). ), without any possibility of withdrawal.

Les extrémités des crochets sont alors coincées dans le cylindre de tête (3), constituant ainsi la prise d'appui nécessaire à la poussée sur le cylindre d'écrou (4). The ends of the hooks are then stuck in the head cylinder (3), thus constituting the support required for the thrust on the nut cylinder (4).

La solidarité des crochets (tiges et parties saillantes), avec les autres éléments du porte-crochet (8) et (9), avant introduction dans le cylindre de tête (3), n'est pas obligatoire. Les crochets peuvent être introduits tour à tour "à l'aveugle" sous la couronne (5) dans le cylindre (3), et être joints après coup aux éléments (8) et (9) du porte- crochet. The solidarity of the hooks (rods and protrusions), with the other elements of the hook holder (8) and (9), before introduction into the head cylinder (3), is not mandatory. The hooks can be inserted in turn "blind" under the crown (5) in the cylinder (3), and be joined afterwards to the elements (8) and (9) of the hook holder.

N'ayant nullement besoin dans ce contexte de flexibilité, la longueur des tiges de crochet (16) peut-être grandement diminuée. Having no need in this context of flexibility, the length of the hook rods (16) can be greatly reduced.

Comme précédemment, une pression simultanée et antagoniste sur le piston (18) (19) ou (25), ainsi que sur la partie inférieure du col (9) du porte crochet, met le piston en mouvement. La poussée de ce dernier déforme les pattes (6) de la cheville et repousse le cylindre d'écrou (4) vers sa position d'origine. As previously, a simultaneous and antagonistic pressure on the piston (18) (19) or (25), as well as on the lower part of the neck (9) of the hook holder, sets the piston in motion. The thrust of the latter deforms the legs (6) of the ankle and pushes the nut cylinder (4) to its original position.

Le crochet unique ou la pluralité de crochets détermine la forme des pistons, lamelliformes (18), en "i" (25) pour 2 accroches ou cruciformes (19) pour 4 accroches. The single hook or the plurality of hooks determines the shape of pistons, lamelliform (18), "i" (25) for 2 hooks or cruciform (19) for 4 hooks.

EXTRACTION DE LA CHEVILLE ('Pl. 6/6) Après que le recul du cylindre d'écrou (4) ait été effectué et si celui-ci n'a pas été suffisant (la pression sur ce cylindre doit être très importante pour que le recul soit complet, parfois plus que la résistance de ce cylindre ne le permet), l'extraction de la cheville de son support peut être opérée "en force" grâce à un accrochage à la base du cylindre de tête (3) ou sous couronne (5). EXTRACTION OF THE ANKLE ('Pl. 6/6) After the retraction of the nut cylinder (4) has been made and if it has not been sufficient (the pressure on this cylinder must be very important for the recoil is complete, sometimes more than the resistance of this cylinder allows it), the extraction of the peg from its support can be operated "in force" thanks to a hooking at the base of the head cylinder (3) or under crown (5).

Les crochets (2) ou les parties saillantes (15) sont placés, et le piston (10), (18), 105 (19) ou (25), est laissé à l'intérieur du porte- crochet et descendu dans le cylindre de tête (3) sans toucher le cylindre d'écrou (4). The hooks (2) or protrusions (15) are placed, and the piston (10), (18), 105 (19) or (25) is left inside the hook holder and lowered into the cylinder head (3) without touching the nut cylinder (4).

Un élément cylindrique (20), tronconique (ou toute autre forme), posé sur le support de fixation, recouvre la couronne de la cheville en permettant la sortie de celle-ci. A cylindrical element (20), frustoconical (or any other shape), placed on the fixing support, covers the crown of the ankle allowing the exit thereof.

Le cylindre est ouvert sur toute sa hauteur et sa partie supérieure comporte dans son échancrure (21) un ergot (22), qui vient se placer à l'intérieur d'une encoche (23) pratiquée dans l'épaisseur du piston. The cylinder is open over its entire height and its upper part has in its notch (21) a lug (22), which is placed inside a notch (23) formed in the thickness of the piston.

La pression sur le piston ne porte plus désormais sur le cylindre d'écrou (4), mais sur le support de fixation (24) de la cheville. The pressure on the piston is now no longer on the nut cylinder (4), but on the fixing bracket (24) of the pin.

Une pression simultanée et antagoniste sur la molette (13) du piston en direction du support (24) et sous le col (9) du porte-crochet tendant à éloigner celui-ci de ce même support fait sortir "en force" le corps de la cheville de son logement à l'intérieur du cylindre. Simultaneous and opposing pressure on the wheel (13) of the piston towards the support (24) and under the neck (9) of the hook holder tending to move it away from the same support "force" out the body of the peg of its housing inside the cylinder.

La hauteur du cylindre doit être au moins égale à la moitié de la hauteur de la cheville. The height of the cylinder must be at least equal to half the height of the ankle.

Claims

1) Device for extracting from their support the fixing pins for hollow materials called "expansion" characterized in that it comprises a hook holder (1) which are attached to one or more hooks (2) whose or points d hooks (7) can come to bear under the head cylinder (3) of the ankle, between the legs of the ankle (6), in the restricted space (17), between the two cylinders (3) and ( 4), and by the setting back of the nut cylinder (4) by the pressure exerted on the latter by a piston (10) set in motion inside the head cylinder (3), by the application simultaneous two antagonistic forces exerted, one on the same piston (10), and the other on the hook holder (1).

2) Device according to claim "1" characterized in that the length and flexibility of the hooks (2), in case of plurality thereof, allows their crossing and therefore the approximation of their attachment points ( 7) which then occupy in this position a space allowing their introduction into the head cylinder (3).

3) Device according to one of claims "1" and "'2" characterized in that the hooks (2) pinched for their introduction, are contained in this position inside the head cylinder (3) and see their attachment point (7) released and come to be automatically housed between the legs of the ankle when the operator makes them go blind.

4) Device according to one of the preceding claims from "1" to "3" characterized in that the hooks (2) can be connected to the hook holder (1) taking place inside or outside the body (8) of the latter (1).

5) Device according to one of the preceding claims of "1" to "4" characterized in that the or hooks (2) can be permanently fixed to the hook-holder (1) or detachable thereof so that that they can take support in turn under the head cylinder (3) and be attached afterwards to the hook holder (1).

6) Device according to one of the preceding claims of "1" to "5" characterized by the possibility of introducing into the head cylinder (3), a piston (10) grooved or cut, so that it can be moved in this cylinder and abut on the cylinder nut (4), despite the presence of the hooks regardless of the shape of the latter

7) Device according to one of the preceding claims from "1" to "6" characterized in that the setting back of the nut cylinder (4) to its original position, is effected by the application simultaneous two opposing forces, one applied to the hook holder (1) tending to move it away from the support (24) of the pin, the other on the piston (10) abutted on the nut cylinder (4), towards the support (24) of the ankle.

8) Device for extracting from their support (24) the fixing pins for hollow materials called "expansion" characterized in that it comprises a hook holder (1) which are attached to a number of hooks (16) comprising their end a protruding part (15) able to bear under the crown (5) of the pin inside the head cylinder (3) and by setting back the nut cylinder (4) thanks to the pressure exerted on the latter by a piston (18) or (19) or (25), moved within the head cylinder (3) by the simultaneous application of two opposing forces exerted, one on the same piston (18) or (19) or (25), the other on the hook holder (1).

9) Device according to claim "8" characterized in that the absence of the piston (18), (19), (25) allows through flexibility of the hooks (16), bringing into contact the projecting parts (15) by pinching, and their introduction into the head cylinder (3) if the calculation of their thickness and their width ("L") is appropriate.

10) Device according to one of claims "8" and "'9" characterized in that the introduction and movement in the head cylinder (3) of a piston (18) or (19) or (19) 25) is possible despite the presence of the hooks (16) and that the shape thereof is a function of the number of hooks, lamelliforme (18) in "i" (25) for 2 hooks and cruciform (19) for four.

11) Device according to one of the preceding claims from "8" to "10", characterized in that the presence of the piston and in particular its shape, keeps the projecting parts pressed against the wall of the head cylinder (3) and under the crown (5) without possibility of withdrawal.

12) Device according to one of claims from "8" to "11" characterized in that the or hooks (16) can be permanently fixed to the hook-holder (1) or detachable thereof so that they can take support in turn under the crown (5) of the head cylinder (3) and be attached afterwards to the hook holder (1).

13) Device according to one of claims "8" to "12" characterized in that the setting back of the nut cylinder (4) to its original position is performed by simultaneous application two opposing forces, one applied to the hook holder (1) tending to move it away from the support (24) of the peg, the other on the piston (18) or (19) or (25) in the direction of the support (24).

14) Device for extracting from their support the anchors for hollow materials called "expansion" whose nut cylinder (4) has already been set back according to claims (1) and (8), characterized in that it comprises a cylindrical element (20), frustoconical or other open at its base to allow the exit of the ankle, indented at its top and open on its height so as to allow the penetration of a lug (22) projecting from the notch (21) in a notch (23) of the piston (10), (18), (19) or (25).

15) Device according to claim (14), characterized in that the peg is extracted from its support (24) by the simultaneous application of two opposing forces one applied to the hook holder (1), and the other on the piston (10), (18), (19), or (25) which exerts a pressure on the support (24) via the extraction cylinder (20).