EP4219077A1 - Screwing/unscrewing tool suitable for a screw or a bolt difficult to access - Google Patents

Screwing/unscrewing tool suitable for a screw or a bolt difficult to access Download PDF

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Publication number
EP4219077A1
EP4219077A1 EP23150007.5A EP23150007A EP4219077A1 EP 4219077 A1 EP4219077 A1 EP 4219077A1 EP 23150007 A EP23150007 A EP 23150007A EP 4219077 A1 EP4219077 A1 EP 4219077A1
Authority
EP
European Patent Office
Prior art keywords
screwing
unscrewing
screw
tool
bolt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23150007.5A
Other languages
German (de)
French (fr)
Inventor
Yves ALLOIN
Olivier GOLLION
Florent MOURIN
Dominique Chambon
Pascal Crocombette
Sylvain Leblan
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.)
Manitowoc Crane Group France SAS
Original Assignee
Manitowoc Crane Group France SAS
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 Manitowoc Crane Group France SAS filed Critical Manitowoc Crane Group France SAS
Publication of EP4219077A1 publication Critical patent/EP4219077A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/48—Spanners; Wrenches for special purposes
    • B25B13/481—Spanners; Wrenches for special purposes for operating in areas having limited access
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0078—Reaction arms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • B25B13/462—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/002—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose for special purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/004—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • B66C23/28—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail constructed to operate at successively higher levels
    • B66C23/283—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail constructed to operate at successively higher levels with frameworks composed of assembled elements
    • B66C23/286—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail constructed to operate at successively higher levels with frameworks composed of assembled elements with locking devices

Definitions

  • the invention relates to a screwing/unscrewing tool, for screwing/unscrewing a screw or a bolt. It relates more particularly to a screwing/unscrewing tool suitable for a screw or a bolt that is difficult to access, for example being housed in an enclosed space which offers limited travel for a tool.
  • the invention finds a preferred, and non-limiting, application for screwing and unscrewing screws or bolts used on crane masts or crane jibs, and in particular used to join end-to-end structural elements of the mast or jib.
  • the invention proposes a screwing/unscrewing tool which allows the screwing and unscrewing of a screw or a bolt in an enclosed space which does not allow direct access to a nutrunner, while making it possible to reach torques of sufficiently high tightening, and for example sufficient tightening torques to meet the safety requirements specific to assemblies of crane structural elements.
  • the invention proposes a screwing/unscrewing tool which is suitable for cooperating with a screw or a bolt located in an enclosed space, by coupling the screw or the bolt with the screwing/unscrewing recess of the screw bit. / unscrewing, letting the lever, the support arm and the adjustment screw protrude out of the enclosed space. Then, this screwing/unscrewing tool makes it possible to multiply the torque applied to reach the necessary torque, by means of the lever arm exerted by the lever of the first part which is pushed by the adjustment screw.
  • This set screw can be operated with an electric nutrunner, such as a battery-powered cordless nutrunner, or with a manual wrench; the lever arm offered by the lever allowing to reach a high tightening torque even with a wrench.
  • the invention therefore allows a simplification of screwing and unscrewing, while making it possible to achieve a minimum torque applied to the screw or the bolt.
  • the invention is in particular applicable to screws and bolts which are difficult to access, and which require significant tightening for the good holding of the assembly, in particular in an assembly of structural elements of a crane.
  • the screwing/unscrewing bit has two opposite screwing/unscrewing indentations centered on the main axis.
  • a first screwing/unscrewing imprint serves for screwing
  • a second screwing/unscrewing imprint serves for unscrewing, which makes it possible to easily use the screwing/unscrewing tool both for tightening and for loosen the screw or bolt, also making it easier to use; simply turn it over to present one or the other of the two screwing/unscrewing imprints facing the bolt or the screw.
  • the second part has at least one bearing abutment suitable for resting on a support to block the second part in rotation during screwing/unscrewing.
  • Such a bearing stop is advantageous for blocking the second part, and therefore the support arm and the threaded hole, in order to have a second part that is static during screwing/unscrewing, compared to the first part which is mobile.
  • the at least one support stop is in the form of a projection on the support arm.
  • the at least one bearing abutment is provided on the support arm between the threaded hole and the screwing/unscrewing bit.
  • the tapped hole and the adjustment screw are centered on a screwing axis contained in a plane orthogonal to the main axis.
  • the support arm has two opposite ends, which are a free distal end on which the threaded hole is provided, and a proximal end on which the screwing/unscrewing bit is rotatably mounted along the main axis.
  • the lever is movable into an extreme position in which said lever is in abutment against the free distal end of the support arm and opposite the tapped hole, when the adjusting screw is retracted inside the tapped hole .
  • the screwing/unscrewing bit is placed on the screw or the bolt, with the lever in abutment against the support arm and opposite the tapped hole, when the adjustment screw is retracted inside the hole tapped; which will offer the widest angular travel for the lever and therefore for the screwing/unscrewing movement.
  • the second part of the screwing/unscrewing tool rests on a support to block this second part in rotation during the screwing/unscrewing of the screw or the bolt.
  • the screwing/unscrewing method is implemented to screw or unscrew a screw or a bolt in a mast or a jib of a crane, and in particular a screw or a bolt used in the assembly of two mast or boom structural elements.
  • the invention finds a preferred, but not limiting, application in the field of cranes, and in particular in a mast 5 formed by an assembly of mast elements 50 superimposed and joined end to end.
  • Such mast elements 50 each comprise angle ribs 51 of vertical extension and interconnected by crosspieces or diagonals 52.
  • the angle ribs 51 of two superimposed mast elements 50 are fixed together, end to end. , by connecting screws 6 cooperating with nuts 60.
  • connecting screws 6 which each have a screwing head 61 extended by a threaded rod 62, are housed in recesses 53 of the corner chords 51, which have reduced heights HE, thus offering a limited vertical travel which prevents a access to a bolter.
  • an operator OP accesses the interior of the mast 50, equipped with an access ladder 54 and intermediate platforms 55, to come and screw the connecting screws 6 during the assembly of the mast 5 and unscrew the connecting screws 6 when disassembling the mast 5.
  • a screwing/unscrewing tool 4 is particularly suitable for screwing/unscrewing the connecting screws 6 described above.
  • This screwing/unscrewing tool 4 mainly comprises three elements, namely a first part 1, a second part 2 and an adjustment screw 3, and in which the first part 1 and the second part 2 are coupled in rotation along a main axis AP, and the adjustment screw 3 is screwed into or onto the second part 2.
  • the first part 1 comprises a screwing/unscrewing bit 10 in the form of a cylindrical sleeve centered on the main axis AP and presenting two opposite open ends, where each open end presents an internal profile which is complementary to the head 61 of the connecting screw 6.
  • each open end of the screwing/unscrewing bit 10 forms a screwing/unscrewing imprint 11, 12 centered on the main axis AP and adapted to cooperate with the screwing head 61 of the connecting screw 6.
  • the screw bit 10 has two opposite screwing/unscrewing imprints 11, 12 and centered on the main axis AP, with a first imprint 11 that can be used to unscrew the link 6 and a second cavity 12 that can be used to screw in the link screw 6.
  • the first part 1 also comprises a lever 13 integral with the screwing/unscrewing bit 10, this lever 13 projecting from the screwing/unscrewing bit 10 in a direction substantially orthogonal to the main axis AP.
  • Lever 13 includes a free end 14 which has a bearing surface 15.
  • the second part 2 comprises a support arm 20 on which the screwing/unscrewing bit 10 is rotatably mounted along the main axis AP, this support arm 20 being equipped with a tapped hole 23 in which the adjusting screw 3 is screwed. ; this tapped hole 23 being centered on a screw axis 30 contained in a plane orthogonal to the main axis AP.
  • the support arm 20 thus protrudes from the cylindrical sleeve 27 and extends substantially in a plane orthogonal to the main axis AP.
  • the screwing/unscrewing bit 10 is in a pivot connection in the cylindrical sleeve 27, and it is blocked in translation, for example by means of a washer 41 associated with a circlip 42 which is caught in a groove 16 of the bit. screwing/unscrewing 10.
  • the free distal end 22 has an orifice inside which a sleeve 24 is fixed, for example by means of screws 25, where this sleeve 24 internally defines the tapped hole 23.
  • the tapped hole is formed directly in the free distal end 22.
  • the second part 2 has a bearing abutment 26 which is in the form of a projection on the support arm 20, and in particular of a hook-shaped projection, between the proximal end 21 and the distal end free 22, therefore between the cylindrical sleeve 27 and the tapped hole 23.
  • this abutment 26 is shaped to rest on a support (such as a corner chord 51) to lock the second part 2 in rotation during screwing/unscrewing.
  • the lever 13 When the adjustment screw 3 is retracted inside the tapped hole 23, and does not protrude from the side of the lever 13, the lever 13 can be moved into an extreme position in which the bearing surface 15 is in abutment against the free distal end 22 of the support arm 20 and opposite the tapped hole 23.
  • the rest of the description relates to a screwing/unscrewing method for screwing or unscrewing the connecting screw 6 by means of the screwing/unscrewing tool 1.
  • This process begins by placing the screwing/unscrewing bit 10 on the connecting screw 6, by engaging one of the two screwing/unscrewing recesses 11, 12 on the screwing head 61 of the connecting screw 6.
  • the first recess 11 is engaged to unscrew the connecting screw 6.
  • the second cavity 12 is engaged to screw the connection screw 6. Between the two configurations, the screwing/unscrewing tool 1 is turned 180 degrees.
  • the lever 13 is in its extreme position, with the adjustment screw 3 unscrewed and retracted inside the tapped hole 23.
  • the bearing abutment 26 of the second part 2 bears against the corner chord 51 to block the second part 2 in rotation during the screwing/unscrewing of the connecting screw 61.
  • the support stop 26 does not rest on the same zone of the corner chord 51.
  • the process continues by coupling the coupling head 31 of the adjusting screw 3 to a socket of a wrench or a wrench (not shown), then operating the wrench or turning the wrench to tighten the adjusting screw 3 in the tapped hole 23, and thus to move this adjustment screw 3 in translation, so that its free end 33 bears against the bearing surface 15 to push the lever 13, and thus cause the lever 13 to rotate and the screwing/unscrewing bit 10 in the direction of screwing or unscrewing the connecting screw 6.
  • the operations are repeated enough times to screw or unscrew the connecting screw 6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Jib Cranes (AREA)

Abstract

Outil de vissage/dévissage (4), pour visser/dévisser une vis ou un boulon, comprenant :- une première partie comprenant un levier (13) solidaire d'un embout de vissage/dévissage (10) muni d'au moins une empreinte de vissage/dévissage (11; 12) centrée sur un axe principal (AP) ;- une seconde partie comprenant un bras support (20) équipé d'un trou taraudé (23) et sur lequel est monté rotatif l'embout de vissage/dévissage selon l'axe principal ;- une vis de réglage (3) vissée dans le trou taraudé et présentant une tête d'accouplement (31) conformée pour un accouplement avec une boulonneuse ou une clé, et prolongée par une tige filetée (32) présentant une extrémité libre (33) propre à venir en butée sur le levier afin de lui appliquer un effort de pivotement.L'invention trouve une application pour une vis ou un boulon difficile d'accès, en particulier dans des mâts de grue ou des flèches de grue.Screwing/unscrewing tool (4), for screwing/unscrewing a screw or a bolt, comprising:- a first part comprising a lever (13) secured to a screwing/unscrewing bit (10) provided with at least one screwing / unscrewing (11; 12) centered on a main axis (AP); - a second part comprising a support arm (20) equipped with a threaded hole (23) and on which is rotatably mounted the screw bit / unscrewing along the main axis; - an adjustment screw (3) screwed into the tapped hole and having a coupling head (31) shaped for coupling with a bolter or a wrench, and extended by a threaded rod (32) having a free end (33) capable of coming into abutment on the lever in order to apply a pivoting force to it.The invention finds an application for a screw or a bolt which is difficult to access, in particular in crane masts or crane booms.

Description

[Domaine technique][Technical area]

L'invention se rapporte à un outil de vissage/dévissage, pour visser/dévisser une vis ou un boulon. Elle se rapporte plus particulièrement à un outil de vissage/dévissage adapté pour une vis ou un boulon difficile d'accès, en étant par exemple logé dans un espace enclavé qui offre un débattement limité pour un outil.The invention relates to a screwing/unscrewing tool, for screwing/unscrewing a screw or a bolt. It relates more particularly to a screwing/unscrewing tool suitable for a screw or a bolt that is difficult to access, for example being housed in an enclosed space which offers limited travel for a tool.

L'invention trouve une application favorite, et non limitative, pour visser et dévisser des vis ou boulons employés sur des mâts de grue ou des flèches de grue, et en particulier employés pour joindre bout à bout des éléments structurels de mât ou de flèche.The invention finds a preferred, and non-limiting, application for screwing and unscrewing screws or bolts used on crane masts or crane jibs, and in particular used to join end-to-end structural elements of the mast or jib.

[Etat de la technique][State of the art]

Il est ainsi connu, en particulier du document EP 1873 113 , d'employer des vis de liaison pour assurer des liaisons bout à bout entre des membrures d'angle d'éléments de mât de superposés d'une grue à tour. Pour visser et dévisser ces vis de liaison, il est classique d'employer une clé à cliquet, manipulée manuellement par un opérateur. En effet, l'emploi d'une boulonneuse électrique (aussi appelée visseuse/dévisseuse) n'est pas envisageable dans la mesure où ces vis de liaison sont logées dans des évidements des membrures d'angle qui limitent voire empêchent l'accès à une telle boulonneuse.It is thus known, in particular from the document EP 1873 113 , to use connecting screws to provide end-to-end connections between the corner frames of superimposed mast elements of a tower crane. To screw and unscrew these connecting screws, it is conventional to use a ratchet, manipulated manually by an operator. Indeed, the use of an electric nutrunner (also called screwdriver/unscrewer) is not possible insofar as these connecting screws are housed in recesses of the corner chords which limit or even prevent access to a such bolter.

Or, lorsqu'il est nécessaire de serrer fortement la vis ou le boulon, pour permettre une bonne prise en charge d'efforts et garantir une durée de vie très longue de l'assemblage ainsi procuré, un vissage manuel est particulièrement difficile pour atteindre un couple de serrage suffisamment élevé, de sorte qu'il est préférable de recourir à une boulonneuse. Mais, dans certains cas de figure, comme par exemple celui exposé ci-dessus propre aux mâts de grue, la localisation de la vis ou du boulon dans un évidement enclavé n'autorise pas l'utilisation directe d'une boulonneuse, l'encombrement possible étant trop faible.However, when it is necessary to strongly tighten the screw or the bolt, to allow a good support of efforts and to guarantee a very long lifespan of the assembly thus procured, manual screwing is particularly difficult to achieve a sufficiently high tightening torque, so that it is better to use a nutrunner. But, in certain cases, such as the one described above specific to crane masts, the location of the screw or bolt in an enclosed recess does not allow the direct use of a bolter, the size possible being too low.

[Résumé de l'invention][Summary of Invention]

L'invention propose un outil de vissage/dévissage qui permet le vissage et le dévissage d'une vis ou d'un boulon dans un espace enclavé qui ne permet pas un accès direct à une boulonneuse, tout en permettant d'atteindre des couples de serrage suffisamment élevés, et par exemple des couples de serrage suffisants pour répondre aux exigences de sécurité propres aux assemblages d'éléments structurels de grue.The invention proposes a screwing/unscrewing tool which allows the screwing and unscrewing of a screw or a bolt in an enclosed space which does not allow direct access to a nutrunner, while making it possible to reach torques of sufficiently high tightening, and for example sufficient tightening torques to meet the safety requirements specific to assemblies of crane structural elements.

A cette fin, l'invention propose un outil de vissage/dévissage, pour visser/dévisser une vis ou un boulon, cet outil de vissage/dévissage comprenant une première partie et une seconde partie accouplées en rotation selon un axe principal, ainsi qu'une vis de réglage, et dans lequel :

  • la première partie comprend un levier solidaire d'un embout de vissage/dévissage muni d'au moins une empreinte de vissage/dévissage centrée sur l'axe principal ;
  • la seconde partie comprend un bras support sur lequel est monté rotatif l'embout de vissage/dévissage selon l'axe principal, ledit bras support étant équipé d'un trou taraudé ;
  • la vis de réglage est vissée dans le trou taraudé, la vis de réglage présentant une tête d'accouplement conformée pour un accouplement avec une boulonneuse ou une clé, et prolongée par une tige filetée présentant une extrémité libre propre à venir en butée sur le levier de la première partie afin de lui appliquer un effort de pivotement autour de l'axe principal.
To this end, the invention proposes a screwing/unscrewing tool, for screwing/unscrewing a screw or a bolt, this screwing/unscrewing tool comprising a first part and a second part coupled in rotation along a main axis, as well as an adjusting screw, and wherein:
  • the first part comprises a lever integral with a screwing/unscrewing end piece provided with at least one screwing/unscrewing imprint centered on the main axis;
  • the second part comprises a support arm on which the screwing/unscrewing bit is rotatably mounted along the main axis, said support arm being equipped with a tapped hole;
  • the adjusting screw is screwed into the tapped hole, the adjusting screw having a coupling head shaped for coupling with a bolter or a wrench, and extended by a threaded rod having a clean free end to come into abutment on the lever of the first part in order to apply to it a pivoting force around the main axis.

Ainsi, l'invention propose un outil de vissage/dévissage qui est adapté pour coopérer avec une vis ou un boulon localisé dans un espace enclavé, en accouplant la vis ou le boulon avec l'empreinte de vissage/dévissage de l'embout de vissage/dévissage, laissant dépasser le levier, le bras support et la vis de réglage hors de l'espace enclavé. Ensuite, cet outil de vissage/dévissage permet de multiplier le couple appliqué pour atteindre le couple nécessaire, au moyen du bras de levier exercé par le levier de la première partie qui est poussé par la vis de réglage. Cette vis de réglage peut être actionnée avec une boulonneuse électrique, comme une boulonneuse sans fil sur batterie, ou avec une clé manuelle ; le bras de levier offert par le levier permettant d'atteindre un couple de serrage élevé même avec une clé.Thus, the invention proposes a screwing/unscrewing tool which is suitable for cooperating with a screw or a bolt located in an enclosed space, by coupling the screw or the bolt with the screwing/unscrewing recess of the screw bit. / unscrewing, letting the lever, the support arm and the adjustment screw protrude out of the enclosed space. Then, this screwing/unscrewing tool makes it possible to multiply the torque applied to reach the necessary torque, by means of the lever arm exerted by the lever of the first part which is pushed by the adjustment screw. This set screw can be operated with an electric nutrunner, such as a battery-powered cordless nutrunner, or with a manual wrench; the lever arm offered by the lever allowing to reach a high tightening torque even with a wrench.

L'invention permet donc une simplification du vissage et du dévissage, en tout en permettant d'atteindre un couple minimum appliqué sur la vis ou le boulon. L'invention est en particulier applicable à des vis et boulons d'accès difficile, et nécessitant un serrage important pour la bonne tenue de l'assemblage, en particulier dans un assemblages d'éléments structurels de grue.The invention therefore allows a simplification of screwing and unscrewing, while making it possible to achieve a minimum torque applied to the screw or the bolt. The invention is in particular applicable to screws and bolts which are difficult to access, and which require significant tightening for the good holding of the assembly, in particular in an assembly of structural elements of a crane.

Dans une réalisation particulière, l'embout de vissage/dévissage présente deux empreintes de vissage/dévissage opposées et centrées sur l'axe principal.In a particular embodiment, the screwing/unscrewing bit has two opposite screwing/unscrewing indentations centered on the main axis.

Ainsi, une première empreinte de vissage/dévissage sert pour un vissage, et une deuxième empreinte de vissage/dévissage sert pour un dévissage, ce qui permet d'utiliser aisément l'outil de vissage/dévissage à la fois pour serrer et pour desserrer la vis ou le boulon, rendant aussi plus facile son utilisation ; il suffit de le retourner pour présenter l'une ou l'autre des deux empreintes de vissage/dévissage face au boulon ou à la vis.Thus, a first screwing/unscrewing imprint serves for screwing, and a second screwing/unscrewing imprint serves for unscrewing, which makes it possible to easily use the screwing/unscrewing tool both for tightening and for loosen the screw or bolt, also making it easier to use; simply turn it over to present one or the other of the two screwing/unscrewing imprints facing the bolt or the screw.

Selon une caractéristique, la seconde partie présente au moins une butée d'appui propre à prendre appui sur un support pour bloquer en rotation la seconde partie durant un vissage/dévissage.According to one characteristic, the second part has at least one bearing abutment suitable for resting on a support to block the second part in rotation during screwing/unscrewing.

Une telle butée d'appui est avantageuse pour bloquer la seconde partie, et donc le bras support et le trou fileté, afin d'avoir une seconde partie statique durant le vissage/dévissage, comparativement à la première partie qui est mobile.Such a bearing stop is advantageous for blocking the second part, and therefore the support arm and the threaded hole, in order to have a second part that is static during screwing/unscrewing, compared to the first part which is mobile.

Selon une possibilité, l'au moins une butée d'appui se présente sous la forme d'une saillie sur le bras support.According to one possibility, the at least one support stop is in the form of a projection on the support arm.

Selon une autre possibilité, l'au moins une butée d'appui est prévue sur le bras support entre le trou taraudé et l'embout de vissage/dévissage.According to another possibility, the at least one bearing abutment is provided on the support arm between the threaded hole and the screwing/unscrewing bit.

Dans un mode de réalisation particulier, le trou taraudé et la vis de réglage sont centrés sur un axe de vissage contenu dans un plan orthogonal à l'axe principal.In a particular embodiment, the tapped hole and the adjustment screw are centered on a screwing axis contained in a plane orthogonal to the main axis.

Selon une caractéristique, le bras support présente deux extrémités opposées, qui sont une extrémité distale libre sur laquelle est prévu le trou taraudé, et une extrémité proximale sur laquelle est monté rotatif l'embout de vissage/dévissage selon l'axe principal.According to one feature, the support arm has two opposite ends, which are a free distal end on which the threaded hole is provided, and a proximal end on which the screwing/unscrewing bit is rotatably mounted along the main axis.

Selon une autre caractéristique, le levier est déplaçable dans une position extrême dans laquelle ledit levier est en butée contre l'extrémité distale libre du bras support et en face du trou taraudé, lorsque la vis de réglage est rentrée à l'intérieur du trou taraudé.According to another characteristic, the lever is movable into an extreme position in which said lever is in abutment against the free distal end of the support arm and opposite the tapped hole, when the adjusting screw is retracted inside the tapped hole .

L'invention se rapporte également à un système de vissage/dévissage pour visser/dévisser une vis ou un boulon, qui comprend :

  • un outil de vissage/dévissage selon l'invention ; et
  • une clé ou une boulonneuse munie d'un embout apte à coopérer avec la tête d'accouplement de la vis de réglage, pour pouvoir visser ladite vis de réglage dans le trou taraudé et ainsi la déplacer en translation pour pousser le levier et ainsi faire tourner l'embout de vissage/dévissage.
The invention also relates to a screwing/unscrewing system for screwing/unscrewing a screw or a bolt, which comprises:
  • a screwing/unscrewing tool according to the invention; And
  • a spanner or a nutrunner provided with a tip capable of cooperating with the coupling head of the adjusting screw, in order to be able to screw said adjusting screw into the tapped hole and thus move it in translation to push the lever and thus make it rotate the screwing/unscrewing bit.

L'invention concerne aussi un procédé de vissage/dévissage pour visser ou dévisser une vis ou un boulon au moyen d'un outil de vissage/dévissage selon l'invention, ce procédé mettant en oeuvre les étapes suivantes :

  • placer l'embout de vissage/dévissage sur la vis ou le boulon ;
  • accoupler la tête d'accouplement de la vis de réglage à un embout d'une boulonneuse ou à une clé ;
  • actionner la boulonneuse ou tourner la clé pour visser la vis de réglage dans le trou taraudé et ainsi la déplacer en translation pour pousser le levier et ainsi faire tourner l'embout de vissage/dévissage dans le sens d'un vissage ou d'un dévissage de la vis ou du boulon.
The invention also relates to a screwing/unscrewing method for screwing or unscrewing a screw or a bolt by means of a screwing/unscrewing tool according to the invention, this method implementing the following steps:
  • place the screwing/unscrewing bit on the screw or bolt;
  • couple the coupling head of the adjustment screw to an end piece of a wrench or wrench;
  • operate the wrench or turn the key to screw the adjustment screw into the tapped hole and thus move it in translation to push the lever and thus rotate the screwing/unscrewing bit in the direction of screwing or unscrewing screw or bolt.

Selon une caractéristique, l'embout de vissage/dévissage est placé sur la vis ou le boulon, en ayant le levier en butée contre le bras support et en face du trou taraudé, lorsque la vis de réglage est rentrée à l'intérieur du trou taraudé ; ce qui va offrir le plus large débattement angulaire pour le levier et donc pour le mouvement de vissage/dévissage.According to one characteristic, the screwing/unscrewing bit is placed on the screw or the bolt, with the lever in abutment against the support arm and opposite the tapped hole, when the adjustment screw is retracted inside the hole tapped; which will offer the widest angular travel for the lever and therefore for the screwing/unscrewing movement.

Selon une autre caractéristique, la seconde partie de l'outil de vissage/dévissage est en appui sur un support pour bloquer en rotation cette seconde partie durant le vissage/dévissage de la vis ou du boulon.According to another characteristic, the second part of the screwing/unscrewing tool rests on a support to block this second part in rotation during the screwing/unscrewing of the screw or the bolt.

Dans une réalisation avantageuse, le procédé de vissage/dévissage est mis en oeuvre pour visser ou dévisser une vis ou un boulon dans un mât ou une flèche d'une grue, et en particulier une vis ou un boulon employé dans l'assemblage de deux éléments structurels de mât ou de flèche.In an advantageous embodiment, the screwing/unscrewing method is implemented to screw or unscrew a screw or a bolt in a mast or a jib of a crane, and in particular a screw or a bolt used in the assembly of two mast or boom structural elements.

[Brève description des figures][Brief description of figures]

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée ci-après, d'un exemple de mise en oeuvre non limitatif, faite en référence aux figures annexées dans lesquelles :

  • [Fig 1] est une vue schématique en perspective de deux éléments structurels d'un mât d'une grue, superposés l'un sur l'autre, et joints bout à bout par des vis de liaison, avec un zoom sur une zone de liaison pour visualiser l'une des vis de liaison en situation, et avec une illustration d'une vis de liaison et d'un écrou associé ;
  • [Fig 2] est une vue schématique d'un outil de vissage/dévissage selon l'invention sur les deux éléments structurels de la Figure 1, dans trois situations qui sont une première situation (a) d'insertion de l'outil de vissage/dévissage sur une vis de liaison qui doit être dévissée, une deuxième situation (b) d'utilisation de l'outil de vissage/dévissage pour dévisser la vis de liaison (sens de desserrage), et une troisième situation (c) d'utilisation de l'outil de vissage/dévissage pour visser la vis de liaison (sens de serrage) ;
  • [Fig 3] est une vue schématique en perspective et en éclatée de l'outil de vissage/dévissage employé dans les trois situations de la Figure 2 ; et
  • [Fig 4] est une vue schématique de dessus de l'outil de vissage/dévissage à trois moments du dévissage d'une vis de liaison, sur les deux éléments structurels de la Figure 1, avec un premier moment (a) au début du dévissage, un deuxième moment (b) au milieu du dévissage, et un troisième moment (c) à la fin du dévissage.
Other characteristics and advantages of the present invention will appear on reading the detailed description below, of a non-limiting example of implementation, made with reference to the appended figures in which:
  • [ Fig 1 ] is a schematic perspective view of two structural elements of a mast of a crane, superimposed on each other, and joined end to end by connection screws, with a zoom on a connection area to visualize one of the connecting screws in action, and with an illustration of a connecting screw and associated nut;
  • [ Fig 2 ] is a schematic view of a screwing/unscrewing tool according to the invention on the two structural elements of the Figure 1 , in three situations which are a first situation (a) of insertion of the screwing/unscrewing tool on a connecting screw which must be unscrewed, a second situation (b) of use of the screwing/unscrewing tool to unscrew the connecting screw (direction of loosening), and a third situation (c) of using the screwing/unscrewing tool to tighten the connecting screw (direction of tightening);
  • [ Fig.3 ] is a schematic perspective and exploded view of the screwing/unscrewing tool used in the three situations of the Figure 2 ; And
  • [ Fig 4 ] is a schematic top view of the screwing/unscrewing tool at three times during the unscrewing of a connecting screw, on the two structural elements of there Figure 1 , with a first moment (a) at the start of unscrewing, a second moment (b) in the middle of unscrewing, and a third moment (c) at the end of unscrewing.

[Description détaillée d'un ou plusieurs modes de réalisation de l'invention][Detailed description of one or more embodiments of the invention]

En référence à la Figure 1, l'invention trouve une application favorite, mais non limitative, dans le domaine des grues, et en particulier dans un mât 5 formé d'un assemblage d'éléments de mât 50 superposés et joints bout à bout. De tels éléments de mât 50 comprennent chacun des membrures d'angle 51 d'extension verticale et reliées entre elles par des traverses ou diagonales 52. Les membrures d'angle 51 de deux éléments de mât 50 superposés sont fixées entre elles, bout à bout, par des vis de liaison 6 coopérant avec des écrous 60.With reference to the Figure 1 , the invention finds a preferred, but not limiting, application in the field of cranes, and in particular in a mast 5 formed by an assembly of mast elements 50 superimposed and joined end to end. Such mast elements 50 each comprise angle ribs 51 of vertical extension and interconnected by crosspieces or diagonals 52. The angle ribs 51 of two superimposed mast elements 50 are fixed together, end to end. , by connecting screws 6 cooperating with nuts 60.

Ces vis de liaison 6, qui présentent chacune une tête de vissage 61 prolongée par une tige filetée 62, sont logées dans des évidements 53 des membrures d'angle 51, qui présentent des hauteurs HE réduites, offrant ainsi un débattement vertical limité qui empêche un accès à une boulonneuse. Comme visible sur la Figure 1, un opérateur OP accède à l'intérieur du mât 50, équipé d'une échelle d'accès 54 et de plateformes intermédiaires 55, pour venir visser les vis de liaison 6 lors de l'assemblage du mât 5 et dévisser les vis de liaison 6 lors du désassemblage du mât 5.These connecting screws 6, which each have a screwing head 61 extended by a threaded rod 62, are housed in recesses 53 of the corner chords 51, which have reduced heights HE, thus offering a limited vertical travel which prevents a access to a bolter. As seen on the Figure 1 , an operator OP accesses the interior of the mast 50, equipped with an access ladder 54 and intermediate platforms 55, to come and screw the connecting screws 6 during the assembly of the mast 5 and unscrew the connecting screws 6 when disassembling the mast 5.

En référence à la Figure 3, un outil de vissage/dévissage 4 selon un exemple de réalisation de l'invention, est particulièrement adapté pour visser/dévisser les vis de liaison 6 décrites ci-dessus.With reference to the Figure 3 , a screwing/unscrewing tool 4 according to an exemplary embodiment of the invention, is particularly suitable for screwing/unscrewing the connecting screws 6 described above.

Cet outil de vissage/dévissage 4 comprend principalement trois éléments, à savoir une première partie 1, une seconde partie 2 et une vis de réglage 3, et dans lequel la première partie 1 et la seconde partie 2 sont accouplées en rotation selon un axe principal AP, et la vis de réglage 3 est vissée dans ou sur la seconde partie 2.This screwing/unscrewing tool 4 mainly comprises three elements, namely a first part 1, a second part 2 and an adjustment screw 3, and in which the first part 1 and the second part 2 are coupled in rotation along a main axis AP, and the adjustment screw 3 is screwed into or onto the second part 2.

La première partie 1 comprend un embout de vissage/dévissage 10 se présentant sous la forme d'un manchon cylindrique centré sur l'axe principal AP et présentant deux extrémités ouvertes opposées, où chaque extrémité ouverte présente un profil intérieur qui est complémentaire de la tête de vissage 61 de la vis de liaison 6. Ainsi, chaque extrémité ouverte de l'embout de vissage/dévissage 10 forme une empreinte de vissage/dévissage 11, 12 centrée sur l'axe principal AP et adaptée pour coopérer avec la tête de vissage 61 de la vis de liaison 6. Autrement dit, l'embout de vissage 10 présente deux empreintes de vissage/dévissage 11, 12 opposées et centrées sur l'axe principal AP, avec une première empreinte 11 pouvant être utilisée pour dévisser la vis de liaison 6 et une seconde empreinte 12 pouvant être utilisée pour visser la vis de liaison 6.The first part 1 comprises a screwing/unscrewing bit 10 in the form of a cylindrical sleeve centered on the main axis AP and presenting two opposite open ends, where each open end presents an internal profile which is complementary to the head 61 of the connecting screw 6. Thus, each open end of the screwing/unscrewing bit 10 forms a screwing/unscrewing imprint 11, 12 centered on the main axis AP and adapted to cooperate with the screwing head 61 of the connecting screw 6. In other words, the screw bit 10 has two opposite screwing/unscrewing imprints 11, 12 and centered on the main axis AP, with a first imprint 11 that can be used to unscrew the link 6 and a second cavity 12 that can be used to screw in the link screw 6.

La première partie 1 comprend également un levier 13 solidaire de l'embout de vissage/dévissage 10, ce levier 13 faisant saillie de l'embout de vissage/dévissage 10 selon une direction substantiellement orthogonale à l'axe principal AP. Le levier 13 comprend une terminaison libre 14 qui présente une surface d'appui 15.The first part 1 also comprises a lever 13 integral with the screwing/unscrewing bit 10, this lever 13 projecting from the screwing/unscrewing bit 10 in a direction substantially orthogonal to the main axis AP. Lever 13 includes a free end 14 which has a bearing surface 15.

La seconde partie 2 comprend un bras support 20 sur lequel est monté rotatif l'embout de vissage/dévissage 10 selon l'axe principal AP, ce bras support 20 étant équipé d'un trou taraudé 23 dans lequel est vissée la vis de réglage 3 ; ce trou taraudé 23 étant centré sur un axe de vissage 30 contenu dans un plan orthogonal à l'axe principal AP.The second part 2 comprises a support arm 20 on which the screwing/unscrewing bit 10 is rotatably mounted along the main axis AP, this support arm 20 being equipped with a tapped hole 23 in which the adjusting screw 3 is screwed. ; this tapped hole 23 being centered on a screw axis 30 contained in a plane orthogonal to the main axis AP.

Plus précisément, ce bras support 20 présente deux extrémités 21, 22 opposées, qui sont :

  • une extrémité proximale 21 qui supporte un manchon cylindrique 27 centré sur l'axe principal AP, et à l'intérieur duquel est monté rotatif l'embout de vissage/dévissage 10 selon l'axe principal AP ; et
  • une extrémité distale libre 22 sur laquelle est prévu le trou taraudé 23.
More specifically, this support arm 20 has two opposite ends 21, 22, which are:
  • a proximal end 21 which supports a cylindrical sleeve 27 centered on the main axis AP, and inside which the screwing/unscrewing bit 10 is rotatably mounted along the main axis AP; And
  • a free distal end 22 on which the threaded hole 23 is provided.

Le bras support 20 fait ainsi saillie du manchon cylindrique 27 et s'étend substantiellement dans un plan orthogonal à l'axe principal AP. L'embout de vissage/dévissage 10 est en liaison pivot dans le manchon cylindrique 27, et il est bloqué en translation, par exemple au moyen d'une rondelle 41 associée à un circlips 42 qui se prend dans une gorge 16 de l'embout de vissage/dévissage 10.The support arm 20 thus protrudes from the cylindrical sleeve 27 and extends substantially in a plane orthogonal to the main axis AP. The screwing/unscrewing bit 10 is in a pivot connection in the cylindrical sleeve 27, and it is blocked in translation, for example by means of a washer 41 associated with a circlip 42 which is caught in a groove 16 of the bit. screwing/unscrewing 10.

L'extrémité distale libre 22 présente un orifice à l'intérieur duquel est fixée une douille 24, par exemple au moyen de vis 25, où cette douille 24 définit intérieurement le trou taraudé 23. En variante, le trou taraudé est ménagé directement dans l'extrémité distale libre 22.The free distal end 22 has an orifice inside which a sleeve 24 is fixed, for example by means of screws 25, where this sleeve 24 internally defines the tapped hole 23. Alternatively, the tapped hole is formed directly in the free distal end 22.

La seconde partie 2 présente une butée d'appui 26 qui se présente sous la forme d'une saillie sur le bras support 20, et en particulier d'une saillie en forme de crochet, entre l'extrémité proximale 21 et l'extrémité distale libre 22, donc entre le manchon cylindrique 27 et le trou taraudé 23.The second part 2 has a bearing abutment 26 which is in the form of a projection on the support arm 20, and in particular of a hook-shaped projection, between the proximal end 21 and the distal end free 22, therefore between the cylindrical sleeve 27 and the tapped hole 23.

Comme visible sur la Figure 2 et sur la Figure 4, cette butée d'appui 26 est conformée pour prendre appui sur un support (comme une membrure d'angle 51) pour bloquer en rotation la seconde partie 2 durant un vissage/dévissage.As seen on the Figure 2 and on the Figure 4 , this abutment 26 is shaped to rest on a support (such as a corner chord 51) to lock the second part 2 in rotation during screwing/unscrewing.

La vis de réglage 3 est vissée dans le trou taraudé 23, et est donc également centré sur l'axe de vissage 30. Cette vis de réglage 3 présente :

  • une tête d'accouplement 31 conformée pour un accouplement avec une boulonneuse ou une clé, et
  • une tige filetée 32 qui prolonge la tête d'accouplement 31 et qui se termine par une extrémité libre 33 propre à venir en butée sur le levier 13 de la première partie 1, et plus spécifiquement sur la surface d'appui 15 de sa terminaison libre 14, afin de lui appliquer un effort de pivotement autour de l'axe principal AP.
The adjustment screw 3 is screwed into the tapped hole 23, and is therefore also centered on the screw axis 30. This adjustment screw 3 has:
  • a coupling head 31 shaped for coupling with a nutrunner or a wrench, and
  • a threaded rod 32 which extends the coupling head 31 and which ends in a free end 33 capable of coming into abutment on the lever 13 of the first part 1, and more specifically on the bearing surface 15 of its free end 14, in order to apply a pivoting force to it around the main axis AP.

Lorsque la vis de réglage 3 est rentrée à l'intérieur du trou taraudé 23, et ne dépasse pas du côté du levier 13, le levier 13 peut être déplacé dans une position extrême dans laquelle la surface d'appui 15 est en butée contre l'extrémité distale libre 22 du bras support 20 et en face du trou taraudé 23.When the adjustment screw 3 is retracted inside the tapped hole 23, and does not protrude from the side of the lever 13, the lever 13 can be moved into an extreme position in which the bearing surface 15 is in abutment against the free distal end 22 of the support arm 20 and opposite the tapped hole 23.

La suite de la description porte sur un procédé de vissage/dévissage pour visser ou dévisser la vis de liaison 6 au moyen de l'outil de vissage/dévissage 1.The rest of the description relates to a screwing/unscrewing method for screwing or unscrewing the connecting screw 6 by means of the screwing/unscrewing tool 1.

Ce procédé commence par placer l'embout de vissage/dévissage 10 sur la vis de liaison 6, en engageant l'une des deux empreintes de vissage/dévissage 11, 12 sur la tête de vissage 61 de la vis de liaison 6.This process begins by placing the screwing/unscrewing bit 10 on the connecting screw 6, by engaging one of the two screwing/unscrewing recesses 11, 12 on the screwing head 61 of the connecting screw 6.

Dans les exemples des Figures 2(a) et 2(b) et de la Figure 4, on engage la première empreinte 11 pour dévisser la vis de liaison 6. Dans l'exemple de la Figure 2(c), on engage la seconde empreinte 12 pour visser la vis de liaison 6. Entre les deux configurations, l'outil de vissage/dévissage 1 est retourné à 180 degrés.In the examples of Figures 2(a) and 2(b) and some Figure 4 , the first recess 11 is engaged to unscrew the connecting screw 6. In the example of the Figure 2(c) , the second cavity 12 is engaged to screw the connection screw 6. Between the two configurations, the screwing/unscrewing tool 1 is turned 180 degrees.

De préférence, à ce stade, le levier 13 est dans sa position extrême, avec la vis de réglage 3 dévissée et rentrée à l'intérieur du trou taraudé 23.Preferably, at this stage, the lever 13 is in its extreme position, with the adjustment screw 3 unscrewed and retracted inside the tapped hole 23.

Par ailleurs, la butée d'appui 26 de la seconde partie 2 est en appui sur la membrure d'angle 51 pour bloquer en rotation la seconde partie 2 durant le vissage/dévissage de la vis de liaison 61. Selon que l'on dévisse ou que l'on visse la vis de liaison 61, et donc selon que l'on engage la première empreinte 11 ou la seconde empreinte 12 sur la vis de liaison 6, la butée d'appui 26 ne prend pas appui sur la même zone de la membrure d'angle 51.Furthermore, the bearing abutment 26 of the second part 2 bears against the corner chord 51 to block the second part 2 in rotation during the screwing/unscrewing of the connecting screw 61. Depending on whether or that the connection screw 61 is screwed, and therefore depending on whether the first cavity 11 or the second cavity 12 is engaged on the connection screw 6, the support stop 26 does not rest on the same zone of the corner chord 51.

Le procédé se poursuit en accouplant la tête d'accouplement 31 de la vis de réglage 3 à un embout d'une boulonneuse ou à une clé (non illustrées), puis en actionner la boulonneuse ou en tournant la clé pour visser la vis de réglage 3 dans le trou taraudé 23, et ainsi pour déplacer en translation cette vis de réglage 3, de sorte que son extrémité libre 33 soit en appui sur la surface d'appui 15 pour pousser le levier 13, et ainsi faire tourner le levier 13 et l'embout de vissage/dévissage 10 dans le sens d'un vissage ou d'un dévissage de la vis de liaison 6. Les opérations sont répétées suffisamment de fois pour visser ou dévisser la vis de liaison 6.The process continues by coupling the coupling head 31 of the adjusting screw 3 to a socket of a wrench or a wrench (not shown), then operating the wrench or turning the wrench to tighten the adjusting screw 3 in the tapped hole 23, and thus to move this adjustment screw 3 in translation, so that its free end 33 bears against the bearing surface 15 to push the lever 13, and thus cause the lever 13 to rotate and the screwing/unscrewing bit 10 in the direction of screwing or unscrewing the connecting screw 6. The operations are repeated enough times to screw or unscrew the connecting screw 6.

Claims (13)

Outil de vissage/dévissage (4), pour visser/dévisser une vis ou un boulon, ledit outil de vissage/dévissage (4) comprenant une première partie (1) et une seconde partie (2) accouplées en rotation selon un axe principal (AP), ainsi qu'une vis de réglage (3), et dans lequel : - la première partie (1) comprend un levier (13) solidaire d'un embout de vissage/dévissage (10) muni d'au moins une empreinte de vissage/dévissage (11; 12) centrée sur l'axe principal (AP) ; - la seconde partie (2) comprend un bras support (20) sur lequel est monté rotatif l'embout de vissage/dévissage (10) selon l'axe principal (AP), ledit bras support (20) étant équipé d'un trou taraudé (23) ; - la vis de réglage (3) est vissée dans le trou taraudé (23), la vis de réglage (3) présentant une tête d'accouplement (31) conformée pour un accouplement avec une boulonneuse ou une clé, et prolongée par une tige filetée (32) présentant une extrémité libre (33) propre à venir en butée sur le levier (13) de la première partie (1) afin de lui appliquer un effort de pivotement autour de l'axe principal (AP). Screwing/unscrewing tool (4), for screwing/unscrewing a screw or a bolt, said screwing/unscrewing tool (4) comprising a first part (1) and a second part (2) coupled in rotation along a main axis ( AP), as well as an adjustment screw (3), and in which: - the first part (1) comprises a lever (13) integral with a screwing/unscrewing bit (10) provided with at least one screwing/unscrewing imprint (11; 12) centered on the main axis (AP) ; - the second part (2) comprises a support arm (20) on which the screwing/unscrewing bit (10) is rotatably mounted along the main axis (AP), said support arm (20) being equipped with a hole tapped (23); - the adjustment screw (3) is screwed into the tapped hole (23), the adjustment screw (3) having a coupling head (31) shaped for coupling with a wrench or a wrench, and extended by a rod threaded (32) having a free end (33) capable of coming into abutment on the lever (13) of the first part (1) in order to apply to it a pivoting force around the main axis (AP). Outil de vissage/dévissage (4) selon la revendication 1, dans lequel l'embout de vissage/dévissage (10) présente deux empreintes de vissage/dévissage (11, 12) opposées et centrées sur l'axe principal (AP).Screwing/unscrewing tool (4) according to Claim 1, in which the screwing/unscrewing bit (10) has two screwing/unscrewing imprints (11, 12) opposite and centered on the main axis (AP). Outil de vissage/dévissage (4) selon la revendication 1 ou 2, dans lequel la seconde partie (2) présente au moins une butée d'appui (26) propre à prendre appui sur un support (51) pour bloquer en rotation la seconde partie (2) durant un vissage/dévissage.Screwing/unscrewing tool (4) according to Claim 1 or 2, in which the second part (2) has at least one support stop (26) suitable for bearing on a support (51) to block the second part (2) during screwing/unscrewing. Outil de vissage/dévissage (4) selon la revendication 3, dans lequel l'au moins une butée d'appui (26) se présente sous la forme d'une saillie sur le bras support (20).Screwing/unscrewing tool (4) according to Claim 3, in which the at least one support stop (26) is in the form of a projection on the support arm (20). Outil de vissage/dévissage (4) selon la revendication 3 ou 4, dans lequel l'au moins une butée d'appui (26) est prévue sur le bras support (20) entre le trou taraudé (23) et l'embout de vissage/dévissage (10).Screwing/unscrewing tool (4) according to Claim 3 or 4, in which the at least one bearing stop (26) is provided on the support arm (20) between the threaded hole (23) and the screwing/unscrewing (10). Outil de vissage/dévissage (4) selon l'une quelconque des revendications précédentes, dans lequel le trou taraudé (23) et la vis de réglage (3) sont centrés sur un axe de vissage (30) contenu dans un plan orthogonal à l'axe principal (AP).Screwing/unscrewing tool (4) according to any one of the preceding claims, in which the threaded hole (23) and the adjustment screw (3) are centered on a screw axis (30) contained in a plane orthogonal to the main axis (AP). Outil de vissage/dévissage (4) selon l'une quelconque des revendications précédentes, dans lequel le bras support (20) présente deux extrémités opposées, qui sont une extrémité distale libre (22) sur laquelle est prévu le trou taraudé (23), et une extrémité proximale (21) sur laquelle est monté rotatif l'embout de vissage/dévissage (10) selon l'axe principal (AP).Screwing/unscrewing tool (4) according to any one of the preceding claims, in which the support arm (20) has two opposite ends, which are a free distal end (22) on which the threaded hole (23) is provided, and a proximal end (21) on which the screwing/unscrewing bit (10) is rotatably mounted along the main axis (AP). Outil de vissage/dévissage (4) selon l'une quelconque des revendications précédentes, dans lequel le levier (13) est déplaçable dans une position extrême dans laquelle ledit levier (13) est en butée contre l'extrémité distale libre (22) du bras support (20) et en face du trou taraudé (23), lorsque la vis de réglage (3) est rentrée à l'intérieur du trou taraudé (23).Screwing/unscrewing tool (4) according to any one of the preceding claims, in which the lever (13) is movable in an extreme position in which the said lever (13) is in abutment against the free distal end (22) of the support arm (20) and in front of the tapped hole (23), when the adjustment screw (3) is retracted inside the tapped hole (23). Système de vissage/dévissage pour visser/dévisser une vis (61) ou un boulon, ledit système de vissage/dévissage comprenant : - un outil de vissage/dévissage (4) selon l'une quelconque des revendications 1 à 8 ; et - une clé ou une boulonneuse munie d'un embout apte à coopérer avec la tête d'accouplement (31) de la vis de réglage (3), pour pouvoir visser ladite vis de réglage (3) dans le trou taraudé (23) et ainsi la déplacer en translation pour pousser le levier (13) et ainsi faire tourner l'embout de vissage/dévissage (10). Screwing/unscrewing system for screwing/unscrewing a screw (61) or a bolt, said screwing/unscrewing system comprising: - a screwing/unscrewing tool (4) according to any one of claims 1 to 8; And - a spanner or a nutrunner provided with a tip capable of cooperating with the coupling head (31) of the adjustment screw (3), in order to be able to screw said adjustment screw (3) into the tapped hole (23) and thus moving it in translation to push the lever (13) and thus rotate the screwing/unscrewing bit (10). Procédé de vissage/dévissage pour visser ou dévisser une vis (61) ou un boulon au moyen d'un outil de vissage/dévissage (4) selon l'une quelconque des revendications 1 à 8, ledit procédé de vissage/dévissage mettant en oeuvre les étapes suivantes : - placer l'embout de vissage/dévissage (10) sur la vis (61) ou le boulon ; - accoupler la tête d'accouplement (31) de la vis de réglage (3) à un embout d'une boulonneuse ou à une clé ; - actionner la boulonneuse ou tourner la clé pour visser la vis de réglage (3) dans le trou taraudé (23) et ainsi la déplacer en translation pour pousser le levier (13) et ainsi faire tourner l'embout de vissage/dévissage (10) dans le sens d'un vissage ou d'un dévissage de la vis ou du boulon. Screwing/unscrewing method for screwing or unscrewing a screw (61) or a bolt by means of a screwing/unscrewing tool (4) according to any one of claims 1 to 8, said screwing/unscrewing method implementing the following steps: - place the screwing/unscrewing bit (10) on the screw (61) or the bolt; - coupling the coupling head (31) of the adjusting screw (3) to a socket of a wrench or to a key; - operate the wrench or turn the key to screw the adjustment screw (3) into the tapped hole (23) and thus move it in translation to push the lever (13) and thus rotate the screwing/unscrewing bit (10 ) in the direction of screwing or unscrewing the screw or bolt. Procédé de vissage/dévissage selon la revendication 10, dans lequel l'embout de vissage/dévissage (10) est placé sur la vis (61) ou le boulon, en ayant le levier (13) en butée contre le bras support (20) et en face du trou taraudé (23), lorsque la vis de réglage (3) est rentrée à l'intérieur du trou taraudé (23).Method of screwing/unscrewing according to claim 10, in which the screwing/unscrewing bit (10) is placed on the screw (61) or the bolt, having the lever (13) in abutment against the support arm (20) and opposite the tapped hole (23), when the adjustment screw (3) is returned inside the tapped hole (23). Procédé de vissage/dévissage selon la revendication 10 ou 11, dans lequel la seconde partie (2) de l'outil de vissage/dévissage (4) est en appui sur un support (51) pour bloquer en rotation ladite seconde partie (2) durant le vissage/dévissage de la vis ou du boulon.Screwing/unscrewing method according to claim 10 or 11, in which the second part (2) of the screwing/unscrewing tool (4) bears against a support (51) to block said second part (2) in rotation. while screwing/unscrewing the screw or bolt. Procédé de vissage/dévissage selon l'une quelconque des revendications 10 à 12, dans lequel le procédé de vissage/dévissage est mis en oeuvre pour visser ou dévisser une vis (61) ou un boulon sur un mât (5) ou une flèche d'une grue.Screwing/unscrewing method according to any one of Claims 10 to 12, in which the screwing/unscrewing method is implemented to screw or unscrew a screw (61) or a bolt on a mast (5) or a jib 'a crane.
EP23150007.5A 2022-01-26 2023-01-02 Screwing/unscrewing tool suitable for a screw or a bolt difficult to access Pending EP4219077A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2200668A FR3132041B1 (en) 2022-01-26 2022-01-26 Screwing/unscrewing tool suitable for a difficult to access screw or bolt, especially on a crane mast or boom

Publications (1)

Publication Number Publication Date
EP4219077A1 true EP4219077A1 (en) 2023-08-02

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EP23150007.5A Pending EP4219077A1 (en) 2022-01-26 2023-01-02 Screwing/unscrewing tool suitable for a screw or a bolt difficult to access

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US (1) US20230234191A1 (en)
EP (1) EP4219077A1 (en)
FR (1) FR3132041B1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5584220A (en) * 1994-03-01 1996-12-17 Darrah; Scott A. Angle attachment tool
EP1873113A1 (en) 2006-06-28 2008-01-02 Manitowoc Crane Group France Removable assembly device for mast elements of a tower crane

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5584220A (en) * 1994-03-01 1996-12-17 Darrah; Scott A. Angle attachment tool
EP1873113A1 (en) 2006-06-28 2008-01-02 Manitowoc Crane Group France Removable assembly device for mast elements of a tower crane

Also Published As

Publication number Publication date
US20230234191A1 (en) 2023-07-27
FR3132041B1 (en) 2023-12-22
FR3132041A1 (en) 2023-07-28

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