EP0666388A1 - Insert incorporated in one object for enabling its grip with a device provided with an expanding mandrel - Google Patents

Insert incorporated in one object for enabling its grip with a device provided with an expanding mandrel Download PDF

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Publication number
EP0666388A1
EP0666388A1 EP95400217A EP95400217A EP0666388A1 EP 0666388 A1 EP0666388 A1 EP 0666388A1 EP 95400217 A EP95400217 A EP 95400217A EP 95400217 A EP95400217 A EP 95400217A EP 0666388 A1 EP0666388 A1 EP 0666388A1
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EP
European Patent Office
Prior art keywords
mandrel
insert
cavity
gripping device
diameter
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Withdrawn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
EP95400217A
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German (de)
French (fr)
Inventor
Jean-Pierre Georget
Christian Mignonat
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.)
F C B
Original Assignee
F C B
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
Priority claimed from FR9401212A external-priority patent/FR2715646B1/en
Application filed by F C B filed Critical F C B
Publication of EP0666388A1 publication Critical patent/EP0666388A1/en
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/142—Means in or on the elements for connecting same to handling apparatus

Definitions

  • the present invention relates to an insert intended to be incorporated into an object to be subjected to a handling machine or to a support by means of a gripping device with an expandable mandrel.
  • a gripping device with an expanding mandrel is described, for example, in French patent n ° 9401212 in the name of the applicant.
  • the mandrel is introduced into a cavity formed in this object and whose shape is complementary to that of the mandrel, or of a part of it, when it is expanded.
  • this cavity can be formed in an insert (insert) embedded in the material during molding.
  • the object of the present invention is to provide an insert allowing an easy grip of the object in which it is incorporated by means of a gripping device with expandable mandrel and a secure fixing of the object on the device.
  • the insert object of the present invention is characterized in that it consists of a pot-shaped part comprising a cylindrical upper part capable of receiving a centering part of the gripping device and a lower part in which a cavity is formed. widening downwards and capable of receiving the mandrel, the entrance to this cavity having a diameter less than the inside diameter of the upper part.
  • the diameter of the entry of the cavity formed in the lower part of the insert will be approximately equal to the inside diameter of said tubular part.
  • the depth of said cavity will be greater than the height of the part of the mandrel which is housed therein, so as to provide at the bottom of the cavity a housing for a locking part of the gripping device.
  • the insert will have on its outer surface ribs or other projecting parts ensuring its anchoring in the object in which it is incorporated.
  • the gripping device with an expanding mandrel shown in the drawings is mounted on a chassis 8 constituting an element of a device for handling segments in a tunnel boring machine, this chassis being mounted on a support structure integral with the boring of the boring machine so as to be able to rotate around the axis of the latter and be moved radially to set up the segments in the different positions that they must occupy in the tunnel.
  • the mandrel of the gripping device consists of a bell-shaped piece 10, the lower part of which, slightly flared, is formed of blades which are sufficiently elastic that it is possible to deform them and give the mandrel a cylindrical external shape when it is compressed radially.
  • the mandrel 10 is fixed to the lower end of a tubular piece 12 constituting the piston of a jack 14 mounted on the chassis 8 by means of a ball joint 16 making it possible to modify the orientation of the gripping device with respect to to the chassis.
  • the cylinder body 14 has a cylindrical extension 22 constituting a centering piece of the mandrel; in the retracted position, the mandrel is housed in this centering piece where it is maintained in its cylindrical shape ( Figure 2).
  • the piston 12 At its end opposite to that where the mandrel 10 is fixed, the piston 12 comprises a tubular extension constituting a jack 24, the piston 26 of which is provided with a rod 28 which slides in an axial bore of the piston 12.
  • a frustoconical locking piece 30 is fixed to the end of the rod 28. In the retracted position (FIG. 2), the part 30 is housed in the centering part 22, at the end of the mandrel.
  • the mandrel is intended to be introduced into an insert 18 which has been embedded in the concrete of the segment 20, during manufacture.
  • the insert is constituted by a pot-shaped part comprising an upper part 32, cylindrical and capable of receiving the centering part 22 and a lower part 34 whose inner surface is frustoconical and complementary to that of the unstressed mandrel and forms a cavity 21 adapted to receive the mandrel.
  • the entry of the insert is flared and the end of the part 22 is chamfered to facilitate the introduction of the part into the insert.
  • the diameter of the small base of the cavity 21 is approximately equal to the internal diameter of the part 22 and its depth is greater than the height of the part of the mandrel which adapts to it when it is unstressed (FIG. 3) to provide a housing for the locking piece 30.
  • the insert has on its outer surface ribs 36 ensuring its anchoring in the concrete.
  • the mandrel is brought into the axis of the insert by displacement of the chassis 8 of the handling device and orientation of the jack 14.
  • the centering piece 22 is then introduced into the upper part of the insert, the mandrel 10 and the locking piece 30 being retracted inside the piece 22.
  • the jack 14 is then supplied with pressurized fluid to actuate the piston 12 which moves the mandrel 10 and the piece 30 and introduced them into the lower part of the insert (left part of Figure 3).
  • the cylinder 14 remaining supplied, the cylinder 24 is supplied to actuate the piston 26 and bring the part 30 into the locking position inside the mandrel (right part of FIG. 3).
  • the segment is then positively linked to the chassis 8 of the handling device and can be brought, by means of the latter, into the desired position. After installation, the reverse operations are carried out to separate the chuck from the segment.
  • the insert of the invention can be used on any object which can be handled by means of a gripping device with an expanding sleeve. It can also be used for fixing objects on a wall or other support. It is also understood that all the modifications which can be made to the embodiment described by the use of equivalent technical means fall within the scope of the invention.

Abstract

The insert, designed to be incorporated in an article prior to handling by a manipulator with an expanding mandrel, consists of a pot-shaped component with an upper cylindrical section (32) made to receive a centering element on a manipulator gripper, and a lower section (34) with an inner cavity which diverged towards the bottom to receive the expanding mandrel. The inlet end of the cavity has a diameter which is smaller than the inner diameter of a tubular component on the gripper which contains a retractable mandrel. The depth of the cavity (21) is greater than the height of the mandrel section it is designed to receive, leaving a recess to contain a locking element.

Description

La présente invention a trait à un insert destiné à être incorporé à un objet devant être assujetti à un engin de manutention ou à un support au moyen d'un dispositif de préhension à mandrin expansible.The present invention relates to an insert intended to be incorporated into an object to be subjected to a handling machine or to a support by means of a gripping device with an expandable mandrel.

Un dispositif de préhension à mandrin expansible est décrit, par exemple, dans le brevet français n° 9401212 au nom du demandeur. Pour la manutention d'un objet ou sa fixation sur un support, le mandrin est introduit dans une cavité ménagée dans cet objet et dont la forme est complémentaire de celle du mandrin, ou d'une partie de celui-ci, lorsqu'il est expansé. Pour un objet moulé, par exemple en béton, cette cavité peut être formée dans un insert (pièce rapportée) noyée dans le matériau pendant le moulage.A gripping device with an expanding mandrel is described, for example, in French patent n ° 9401212 in the name of the applicant. For handling an object or fixing it to a support, the mandrel is introduced into a cavity formed in this object and whose shape is complementary to that of the mandrel, or of a part of it, when it is expanded. For a molded object, for example concrete, this cavity can be formed in an insert (insert) embedded in the material during molding.

Le but de la présente invention est de fournir un insert permettant une prise facile de l'objet auquel il est incorporé au moyen d'un dispositif de préhension à mandrin expansible et une fixation sûre de l'objet sur le dispositif.The object of the present invention is to provide an insert allowing an easy grip of the object in which it is incorporated by means of a gripping device with expandable mandrel and a secure fixing of the object on the device.

L'insert objet de la présente invention est caractérisé en ce qu'il est constitué par une pièce en forme de pot comprenant une partie supérieure cylindrique apte à recevoir une pièce de centrage du dispositif de préhension et une partie inférieure dans laquelle est formée une cavité s'évasant vers le bas et apte à recevoir le mandrin, l'entrée de cette cavité ayant un diamètre inférieur au diamètre intérieur de la partie supérieure.The insert object of the present invention is characterized in that it consists of a pot-shaped part comprising a cylindrical upper part capable of receiving a centering part of the gripping device and a lower part in which a cavity is formed. widening downwards and capable of receiving the mandrel, the entrance to this cavity having a diameter less than the inside diameter of the upper part.

Dans le cas où le dispositif de préhension comporte une pièce tubulaire servant de pièce de centrage et dans laquelle le mandrin peut être rétracté, le diamètre de l'entrée de la cavité ménagée dans la partie inférieure de l'insert sera approximativement égal au diamètre intérieur de ladite pièce tubulaire.In the case where the gripping device comprises a tubular piece serving as a centering piece and in which the mandrel can be retracted, the diameter of the entry of the cavity formed in the lower part of the insert will be approximately equal to the inside diameter of said tubular part.

De préférence, la profondeur de ladite cavité sera supérieure à la hauteur de la partie du mandrin venant s'y loger, de façon à ménager au fond de la cavité un logement pour une pièce de verrouillage du dispositif de préhension.Preferably, the depth of said cavity will be greater than the height of the part of the mandrel which is housed therein, so as to provide at the bottom of the cavity a housing for a locking part of the gripping device.

Avantageusement, l'insert comportera sur sa surface extérieure des nervures ou autres parties en saillie assurant son ancrage dans l'objet auquel il est incorporé.Advantageously, the insert will have on its outer surface ribs or other projecting parts ensuring its anchoring in the object in which it is incorporated.

La description qui suit se réfère aux dessins l'accompagnant qui montrent, à titre d'exemple non-limitatif, une forme de réalisation de l'invention et sur lesquels :

  • La figure 1 est une vue en coupe verticale d'un insert, conforme à l'invention ;
  • La figure 2 est une vue en coupe verticale d'un dispositif de préhension pour la manutention d'un voussoir auquel est incorporé l'insert de la figure 1 ; et
  • La figure 3 est une vue en coupe du dispositif de préhension avec le mandrin engagé dans l'insert du voussoir.
The following description refers to the accompanying drawings which show, by way of non-limiting example, an embodiment of the invention and in which:
  • Figure 1 is a vertical sectional view of an insert, according to the invention;
  • Figure 2 is a vertical sectional view of a gripping device for handling a segment which is incorporated the insert of Figure 1; and
  • Figure 3 is a sectional view of the gripping device with the mandrel engaged in the insert of the segment.

Le dispositif de préhension à mandrin expansible représenté sur les dessins est monté sur un chassis 8 constituant un élément d'un dispositif de manutention de voussoirs dans un tunnelier, ce châssis étant monté sur une structure support solidaire du bouclier du tunnelier de façon à pouvoir tourner autour de l'axe de ce dernier et être déplacé radialement pour mettre en place les voussoirs dans les différentes positions qu'ils doivent occuper dans le tunnel.The gripping device with an expanding mandrel shown in the drawings is mounted on a chassis 8 constituting an element of a device for handling segments in a tunnel boring machine, this chassis being mounted on a support structure integral with the boring of the boring machine so as to be able to rotate around the axis of the latter and be moved radially to set up the segments in the different positions that they must occupy in the tunnel.

Le mandrin du dispositif de préhension est constitué par une pièce en forme de cloche 10 dont la partie inférieure, légèrement évasée, est formée de lames suffisamment élastiques pour qu'il soit possible de les déformer et de donner au mandrin une forme extérieure cylindrique lorsqu'on le comprime radialement.The mandrel of the gripping device consists of a bell-shaped piece 10, the lower part of which, slightly flared, is formed of blades which are sufficiently elastic that it is possible to deform them and give the mandrel a cylindrical external shape when it is compressed radially.

Le mandrin 10 est fixé à l'extrémité inférieure d'une pièce tubulaire 12 constituant le piston d'un vérin 14 monté sur le châssis 8 par l'intermédiaire d'une rotule 16 permettant de modifier l'orientation du dispositif de préhension par rapport au chassis. Le corps du vérin 14 comporte un prolongement cylindrique 22 constituant une pièce de centrage du mandrin ; en position rétractée, le mandrin est logé dans cette pièce de centrage où il est maintenu dans sa forme cylindrique (figure 2).The mandrel 10 is fixed to the lower end of a tubular piece 12 constituting the piston of a jack 14 mounted on the chassis 8 by means of a ball joint 16 making it possible to modify the orientation of the gripping device with respect to to the chassis. The cylinder body 14 has a cylindrical extension 22 constituting a centering piece of the mandrel; in the retracted position, the mandrel is housed in this centering piece where it is maintained in its cylindrical shape (Figure 2).

A son extrémité opposé à celle où est fixé le mandrin 10, le piston 12 comporte un prolongement tubulaire constituant un vérin 24 dont le piston 26 est muni d'une tige 28 qui coulisse dans un alésage axial du piston 12. Une pièce de verrouillage tronconique 30 est fixée à l'extrémité de la tige 28. En position rétractée (figure 2), la pièce 30 est logée dans la pièce de centrage 22, au bout du mandrin.At its end opposite to that where the mandrel 10 is fixed, the piston 12 comprises a tubular extension constituting a jack 24, the piston 26 of which is provided with a rod 28 which slides in an axial bore of the piston 12. A frustoconical locking piece 30 is fixed to the end of the rod 28. In the retracted position (FIG. 2), the part 30 is housed in the centering part 22, at the end of the mandrel.

Le mandrin est destiné à être introduit dans un insert 18 qui a été noyé dans le béton du voussoir 20, en cours de fabrication. L'insert est constitué par une pièce en forme de pot comprenant une partie supérieure 32, cylindrique et apte à recevoir la pièce de centrage 22 et une partie inférieure 34 dont la surface intérieure est tronconique et complémentaire de celle du mandrin non contraint et forme une cavité 21 apte à recevoir le mandrin. L'entrée de l'insert est évasée et l'extrémité de la pièce 22 est chanfreinée pour faciliter l'introduction de la pièce dans l'insert. Le diamètre de la petite base de la cavité 21 est approximativement égal au diamètre intérieur de la pièce 22 et sa profondeur est supérieure à la hauteur de la partie du mandrin qui s'y adapte lorsqu'il est non contraint (figure 3) de façon à ménager un logement pour la pièce de verrouillage 30. L'insert comporte sur sa surface extérieure des nervures 36 assurant son ancrage dans le béton.The mandrel is intended to be introduced into an insert 18 which has been embedded in the concrete of the segment 20, during manufacture. The insert is constituted by a pot-shaped part comprising an upper part 32, cylindrical and capable of receiving the centering part 22 and a lower part 34 whose inner surface is frustoconical and complementary to that of the unstressed mandrel and forms a cavity 21 adapted to receive the mandrel. The entry of the insert is flared and the end of the part 22 is chamfered to facilitate the introduction of the part into the insert. The diameter of the small base of the cavity 21 is approximately equal to the internal diameter of the part 22 and its depth is greater than the height of the part of the mandrel which adapts to it when it is unstressed (FIG. 3) to provide a housing for the locking piece 30. The insert has on its outer surface ribs 36 ensuring its anchoring in the concrete.

Pour manipuler un voussoir, le mandrin est amené dans l'axe de l'insert par déplacement du châssis 8 du dispositif de manutention et orientation du vérin 14. La pièce de centrage 22 est alors introduite dans la partie supérieure de l'insert, le mandrin 10 et la pièce de verrouillage 30 étant rétractés à l'intérieur de la pièce 22. Le vérin 14 est ensuite alimenté en fluide sous pression pour actionner le piston 12 qui déplace le mandrin 10 et la pièce 30 et les introduits dans la partie inférieure de l'insert (partie gauche de la figure 3). Le vérin 14 restant alimenté, on alimente le vérin 24 pour actionner le piston 26 et amener la pièce 30 en position de verrouillage à l'intérieur du mandrin (partie droite de la figure 3). Le voussoir est alors lié positivement au chassis 8 du dispositif de manutention et peut être amené, au moyen de ce dernier, dans la position voulue. Après mise en place, on effectue les opérations inverses pour désolidariser le mandrin du voussoir.To handle a segment, the mandrel is brought into the axis of the insert by displacement of the chassis 8 of the handling device and orientation of the jack 14. The centering piece 22 is then introduced into the upper part of the insert, the mandrel 10 and the locking piece 30 being retracted inside the piece 22. The jack 14 is then supplied with pressurized fluid to actuate the piston 12 which moves the mandrel 10 and the piece 30 and introduced them into the lower part of the insert (left part of Figure 3). The cylinder 14 remaining supplied, the cylinder 24 is supplied to actuate the piston 26 and bring the part 30 into the locking position inside the mandrel (right part of FIG. 3). The segment is then positively linked to the chassis 8 of the handling device and can be brought, by means of the latter, into the desired position. After installation, the reverse operations are carried out to separate the chuck from the segment.

L'insert de l'invention peut être utilisé sur tout objet pouvant être manipulé au moyen d'un dispositif de préhension à manchon expansible. Il peut aussi être utilisé pour la fixation des objets sur une paroi ou autre support. Il est par ailleurs bien entendu que toutes les modifications qui peuvent être apportées à la forme de réalisation décrite par l'emploi de moyens techniques équivalents entrent dans le cadre de l'invention.The insert of the invention can be used on any object which can be handled by means of a gripping device with an expanding sleeve. It can also be used for fixing objects on a wall or other support. It is also understood that all the modifications which can be made to the embodiment described by the use of equivalent technical means fall within the scope of the invention.

Claims (4)

Insert destiné à être incorporé à un objet devant être manipulé au moyen du dispositif de préhension à mandrin expansible, caractérisé en ce qu'il est constitué par une pièce en forme de pot comprenant une partie supérieure cylindrique (32) apte à recevoir une pièce de centrage du dispositif de préhension et une partie inférieure (34) dans laquelle est formée une cavité (21) s'évasant vers le bas et apte à recevoir le mandrin, l'entrée de cette cavité ayant un diamètre inférieur au diamètre intérieur de la partie supérieure.Insert intended to be incorporated into an object to be manipulated by means of the gripping device with expandable mandrel, characterized in that it consists of a pot-shaped part comprising a cylindrical upper part (32) capable of receiving a part of centering of the gripping device and a lower part (34) in which is formed a cavity (21) which widens downwards and is capable of receiving the mandrel, the inlet of this cavity having a diameter less than the internal diameter of the part superior. Insert selon la revendication 1, pour la manipulation d'objet au moyen d'un dispositif de préhension à mandrin expansible comportant une pièce tubulaire servant de pièce de centrage et dans laquelle le mandrin peut être rétracté, caractérisé en ce que le diamètre de l'entrée de ladite cavité (21) est approximativement égal au diamètre intérieur de ladite pièce tubulaire.Insert according to claim 1, for manipulating an object by means of a gripping device with an expanding mandrel comprising a tubular piece serving as a centering piece and in which the mandrel can be retracted, characterized in that the diameter of the inlet of said cavity (21) is approximately equal to the inside diameter of said tubular piece. Insert selon la revendication 1 ou 2, caractérisé en ce que la profondeur de ladite cavité (21) est supérieure à la hauteur de la partie du mandrin qui vient s'y loger, de façon à ménager au fond de la cavité un logement pour une pièce de verrouillage du dispositif de préhension.Insert according to claim 1 or 2, characterized in that the depth of said cavity (21) is greater than the height of the part of the mandrel which is housed therein, so as to provide a recess at the bottom of the cavity for a locking part of the gripping device. Insert selon la revendication 1, 2 ou 3, caractérisé en ce qu'il comporte sur sa surface extérieure des parties en saillie (36) assurant l'ancrage de l'insert (18) dans l'objet (20) auquel il est incorporé.Insert according to claim 1, 2 or 3, characterized in that it has on its outer surface projecting parts (36) ensuring the anchoring of the insert (18) in the object (20) in which it is incorporated .
EP95400217A 1994-02-03 1995-02-02 Insert incorporated in one object for enabling its grip with a device provided with an expanding mandrel Withdrawn EP0666388A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9401212A FR2715646B1 (en) 1994-02-03 1994-02-03 Gripping device with expandable mandrel.
FR9404704 1994-04-20
FR9404704A FR2715700B1 (en) 1994-02-03 1994-04-20 Insert intended to be incorporated into an object to allow it to be grasped by means of an expandable mandrel device.
FR9401212 1994-10-19

Publications (1)

Publication Number Publication Date
EP0666388A1 true EP0666388A1 (en) 1995-08-09

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EP95400217A Withdrawn EP0666388A1 (en) 1994-02-03 1995-02-02 Insert incorporated in one object for enabling its grip with a device provided with an expanding mandrel

Country Status (2)

Country Link
EP (1) EP0666388A1 (en)
FR (1) FR2715700B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8679294B2 (en) 2008-08-28 2014-03-25 International Paper Company Expandable microspheres and methods of making and using the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4017115A (en) * 1975-12-17 1977-04-12 The Burke Company Lift system for concrete slabs
US4068879A (en) * 1976-07-12 1978-01-17 The Burke Company Concrete slab hoisting apparatus
US4290638A (en) * 1979-10-17 1981-09-22 Superior Concrete Accessories, Inc. Apparatus for releasable connection to an embedded member

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4017115A (en) * 1975-12-17 1977-04-12 The Burke Company Lift system for concrete slabs
US4068879A (en) * 1976-07-12 1978-01-17 The Burke Company Concrete slab hoisting apparatus
US4290638A (en) * 1979-10-17 1981-09-22 Superior Concrete Accessories, Inc. Apparatus for releasable connection to an embedded member

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8679294B2 (en) 2008-08-28 2014-03-25 International Paper Company Expandable microspheres and methods of making and using the same

Also Published As

Publication number Publication date
FR2715700B1 (en) 1996-04-05
FR2715700A1 (en) 1995-08-04

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