[go: up one dir, main page]

EP0085631A1 - Safety hooks - Google Patents

Safety hooks Download PDF

Info

Publication number
EP0085631A1
EP0085631A1 EP83400216A EP83400216A EP0085631A1 EP 0085631 A1 EP0085631 A1 EP 0085631A1 EP 83400216 A EP83400216 A EP 83400216A EP 83400216 A EP83400216 A EP 83400216A EP 0085631 A1 EP0085631 A1 EP 0085631A1
Authority
EP
European Patent Office
Prior art keywords
latch
hook
opening
spout
lock
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Withdrawn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
EP83400216A
Other languages
German (de)
French (fr)
Inventor
Blaise Henrion
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0085631A1 publication Critical patent/EP0085631A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/22Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/34Crane hooks
    • B66C1/36Crane hooks with means, e.g. spring-biased detents, for preventing inadvertent disengagement of loads

Definitions

  • the present invention relates to hooks comprising a safety latch which is pivotally mounted on the body of the hook so as to be able to be applied to the spout of this hook and to close the opening thereof, and the end portion of which opposite the spout possibly has a connecting element, for example an eye.
  • the latch thus automatically comes into the safety position when the hook is subjected to a load.
  • hooks of this kind comprising a latch which is disposed at the rear of the hook and of which a spout can engage in an opening provided in the central part of the latch, when the latter is in the safety position.
  • the latch cannot thus inadvertently release the opening of the hook. But experience shows that it can happen that the latch, by pivoting from its safety position, comes to jam the thumb placed on the lock.
  • the present invention relates to an improvement made to these hooks in order to avoid this drawback.
  • the hook according to the invention is characterized in that the latch comprises, at its rear part, a boss capable of coming into abutment against a substantially tangent face of the lock, which limits the pivoting of the latch, and in that the hook body is shaped so as to allow the latch to pivot by a sufficient angle so that its beak emerges from the opening of the latch in the safety position, but insufficient for it come outside the path of the boss of this latch.
  • the central part of the pawl has a second opening in which the spout of the latch can engage when the boss of the pawl bears against this latch.
  • the safety latch 4 is pivotally mounted around an axis 5 between two ears the provided at the upper part of the body 1.
  • the upper end of this latch is provided with an eye 6 and its lower end can be applied to the spout 3 by closing the opening 2 and thus preventing the release of the sling or the ring in which the spout 3 has been engaged.
  • the lock 7 is pivotally mounted at 8 at the rear of the body 3, between the two ears la.
  • the bolt or beak 9 of this lock can engage in an opening 10 of complementary shape provided at the periphery of the central part 4a, forming a hub, of the latch 4 so immobilizing the latter in its safety position; a certain play is of course provided to allow the spout 9 of the lock to disengage from the opening 10.
  • a machining 11 provided in the body 1 allows the lock 7 to pivot enough so that its beak 9 emerges from the opening 10.
  • the hub 4a of the length 4 has a second opening 12 in which the spout 9 of the lock can engage when the latch is in the open position ( Figure 2).
  • This opening also has a shape complementary to that of the spout 9, that is to say it has two faces 12a and 12b against which the faces 9a and 9b of this spout 9 come to bear.
  • the latch has a boss 4b which comes to bear on the face 9c of the spout 9, opposite the face 9a thereof.
  • This face 9c is substantially tangent, that is to say perpendicular to the radius of rotation of the latch 7, passing through the point of contact.
  • the machining 11 has a depth allowing the latch 7 to pivot sufficiently so that the thumb 13 of the user operating the latch is not crushed by the latch coming in the open position. However, this depth is insufficient to allow the face 9c of the spout 9 to come out of the path of the boss 4b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)

Abstract

Hook comprising a safety catch which is mounted pivotably on the body of the hook so as to be able to be applied against the tip of this hook and to close the opening of the latter, and a lock which is arranged at the rear of the hook and a nose of which can engage in an opening provided in the central part of the catch when the latter is in the safety position. The catch (4) comprises, at its rear part, a hump (4b) capable of abutting the lock (7), which limits the pivoting of the catch, and the body (1) of the hook is shaped so as to enable the lock to pivot by an angle which is sufficient for its nose (9) to come out of the opening (10) of the catch in the safety position, but insufficient for it to come out of the path of the hump (4a) of this catch. <IMAGE>

Description

La présente invention concerne les crochets comportant un linguet de sécurité qui est monté pivotant sur le corps du crochet de façon à pouvoir s'appliquer sur le bec de ce crochet et fermer l'ouverture de celui-ci, et dont la portion d'extrémité opposée au bec présente éventuellement un élément de raccordement, par exemple un oeil. Le linguet vient ainsi automatiquement en position de sécurité lorsque le crochet est soumis à une charge.The present invention relates to hooks comprising a safety latch which is pivotally mounted on the body of the hook so as to be able to be applied to the spout of this hook and to close the opening thereof, and the end portion of which opposite the spout possibly has a connecting element, for example an eye. The latch thus automatically comes into the safety position when the hook is subjected to a load.

Il existe des crochets de ce genre comportant un verrou qui est disposé à l'arrière du crochet et dont un bec peut s'engager dans une ouverture prévue dans la partie centrale du linguet, lorsque celui-ci est en position de sécurité. Le linguet ne peut ainsi libérer intempestivement l'ouverture du crochet. Mais l'expérience montre qu'il peut arriver que le linguet, en pivotant depuis sa position de sécurité, vienne coincer le pouce posé sur le verrou.There are hooks of this kind comprising a latch which is disposed at the rear of the hook and of which a spout can engage in an opening provided in the central part of the latch, when the latter is in the safety position. The latch cannot thus inadvertently release the opening of the hook. But experience shows that it can happen that the latch, by pivoting from its safety position, comes to jam the thumb placed on the lock.

La présente invention a pour objet un perfectionnement apporté à ces crochets dans le but d'éviter cet inconvénient.The present invention relates to an improvement made to these hooks in order to avoid this drawback.

Le crochet selon l'invention est caractérisé en ce que le linguet comporte, à sa partie arrière, un bossage propre à venir en butée contre une face sensiblement tangente du verrou, ce qui limite le pivotement du linguet, et en ce que le corps du crochet est conformé de manière à permettre au verrou de pivoter d'un angle suffisant pour que son bec se dégage de l'ouverture du linguet en position de sécurité, mais insuffisant pour qu'il vienne en dehors du trajet du bossage de ce linguet.The hook according to the invention is characterized in that the latch comprises, at its rear part, a boss capable of coming into abutment against a substantially tangent face of the lock, which limits the pivoting of the latch, and in that the hook body is shaped so as to allow the latch to pivot by a sufficient angle so that its beak emerges from the opening of the latch in the safety position, but insufficient for it come outside the path of the boss of this latch.

Dans ces conditions, lorsque le linguet pivote, sa course est limitée par la rencontre de son bossage avec le verrou, ce qui empêche le coincement du pouce de l'utilisateur.Under these conditions, when the latch swivels, its stroke is limited by the meeting of its boss with the latch, which prevents the thumb of the user from being trapped.

Dans un mode particulier de l'invention, la partie centrale du linguet comporte une deuxième ouverture dans laquelle peut s'engager le bec du verrou lorsque le bossage du linguet est en appui contre ce verrou.In a particular embodiment of the invention, the central part of the pawl has a second opening in which the spout of the latch can engage when the boss of the pawl bears against this latch.

On a décrit ci-après, à titre d'exemple non limitatif, un mode de réalisation d'un crochet de sécurité perfectionné selon la présente invention, avec référence au dessin annexé dans lequel :

  • . La Figure 1 est une vue en élévation du crochet avec arrachement partiel, le linguet étant verrouillé en position de sécurité,
  • . La Figure 2 montre une partie du crochet, le linguet étant en butée contre le verrou.
An embodiment of an improved safety hook according to the present invention has been described below, by way of non-limiting example, with reference to the appended drawing in which:
  • . FIG. 1 is an elevation view of the hook with partial cutaway, the latch being locked in the safety position,
  • . Figure 2 shows part of the hook, the latch abutting against the latch.

Au dessin, on voit en 1 le corps d'un crochet qui délimite l'ouverture 2 et est terminé par un bec 3.In the drawing, we see in 1 the body of a hook which delimits the opening 2 and is terminated by a spout 3.

Le linguet de sécurité 4 est monté pivotant autour d'un axe 5 entre deux oreilles la prévue à la partie supérieure du corps 1. L'extrémité supérieure de ce linguet est munie d'un oeil 6 et son extrémité inférieure peut s'appliquer sur le bec 3 en fermant l'ouverture 2 et empêchant ainsi le dégagement de l'élingue ou de l'anneau dans lequel a été engagé le bec 3.The safety latch 4 is pivotally mounted around an axis 5 between two ears the provided at the upper part of the body 1. The upper end of this latch is provided with an eye 6 and its lower end can be applied to the spout 3 by closing the opening 2 and thus preventing the release of the sling or the ring in which the spout 3 has been engaged.

Le verrou 7 est monté pivotant en 8 à l'arrière du corps 3, entre les deux oreilles la. Le pène ou bec 9 de ce verrou peut s'engager dans une ouverture 10 de forme complémentaire prévue à la périphérie de la partie centrale 4a, formant moyeu, du linguet 4 de façon à immobiliser ce dernier dans sa position de sécurité; un certain jeu est bien entendu prévu pour permettre au bec 9 du verrou de se dégager de l'ouverture 10.The lock 7 is pivotally mounted at 8 at the rear of the body 3, between the two ears la. The bolt or beak 9 of this lock can engage in an opening 10 of complementary shape provided at the periphery of the central part 4a, forming a hub, of the latch 4 so immobilizing the latter in its safety position; a certain play is of course provided to allow the spout 9 of the lock to disengage from the opening 10.

Un usinage 11 prévu dans le corps 1 permet au verrou 7 de pivoter suffisamment pour que son bec 9 se dégage de l'ouverture 10.A machining 11 provided in the body 1 allows the lock 7 to pivot enough so that its beak 9 emerges from the opening 10.

Le moyeu 4a du longuet 4 présente une deuxième ouverture 12 dans laquelle le bec 9 du verrou peut s'engager lorsque le linguet est en position d'ouverture (Figure 2). Cette ouverture a également une forme complémentaire de celle du bec 9, c'est-à-dire qu'elle présente deux faces 12a et 12b contre lesquelles viennent en appui les faces 9a et 9b de ce bec 9.The hub 4a of the length 4 has a second opening 12 in which the spout 9 of the lock can engage when the latch is in the open position (Figure 2). This opening also has a shape complementary to that of the spout 9, that is to say it has two faces 12a and 12b against which the faces 9a and 9b of this spout 9 come to bear.

Au-delà de l'ouverture 12, le linguet présente un bossage 4b qui vient en appui sur la face 9c du bec 9, opposée à la face 9a de celui-ci. Cette face 9c est sensiblementtangente c'est-à-dire perpendiculaire au rayon de rotation du verrou 7, passant par le point de contact.Beyond the opening 12, the latch has a boss 4b which comes to bear on the face 9c of the spout 9, opposite the face 9a thereof. This face 9c is substantially tangent, that is to say perpendicular to the radius of rotation of the latch 7, passing through the point of contact.

L'usinage 11 présente une profondeur permettant au verrou 7 de pivoter suffisamment pour que le pouce 13 de l'utilisateur manoeuvrant le verrou ne soit pas écrasé par le linguet venant en position d'ouverture. Mais cette profondeur est insuffisante pour permettre à la face 9c du bec 9, de venir hors du trajet du bossage 4b.The machining 11 has a depth allowing the latch 7 to pivot sufficiently so that the thumb 13 of the user operating the latch is not crushed by the latch coming in the open position. However, this depth is insufficient to allow the face 9c of the spout 9 to come out of the path of the boss 4b.

Dans ces conditions, lorsque le linguet 4 prend sa position d'ouverture, le bossage 4b rencontre de manière sûre la face 9c du bec 9; la course du linguet est ainsi limitée, ce qui évite le coincement du pouce. Comme la face 9c est sensiblement tangente l'effort exercé sur le verrou 7 est normal à la surface de contact et ne peut créer un moment qui aurait pour résultat de faire pivoter le verrou autour de son axe 8, dans un sens ou dans l'autre.Under these conditions, when the latch 4 takes its open position, the boss 4b surely meets the face 9c of the spout 9; the stroke of the pawl is thus limited, which avoids the jamming of the thumb. As the face 9c is substantially tangent the force exerted on the latch 7 is normal to the contact surface and cannot create a moment which would result in pivoting the latch around its axis 8, in one direction or in the other.

Il suffit alors de faire pivoter le verrou 7 de façon à engager son bec dans l'ouverture 12, ce qui verrouille le linguet dans sa position d'ouverture.It then suffices to pivot the lock 7 so as to engage its beak in the opening 12, which locks the latch in its open position.

Il va de soi que la présente invention ne doit pas être considérée comme limitée au mode de réalisation décrit et représenté, mais en couvre, au contraire, toutes les variantes.It goes without saying that the present invention should not be considered as limited to the embodiment described and shown, but on the contrary covers all variants thereof.

Claims (2)

1. - Crochet comportant un linguet de sécurité qui est monté pivotant sur le corps du crochet de façon à pouvoir s'appliquer sur le bec de ce crochet et fermer l'ouverture de celui-ci, et un verrou qui est disposé à l'arrière du crochet et dont un bec peut s'engager dans une ouverture prévue dans la partie centrale du linguet lorsque celui-ci est en position de sécurité, caractérisé en ce que le linguet (4) comporte, à sa partie arrière, /de préférence/ un bossage (4b) propre à venir en butée contre une surface/sensi- blement tangente 9c du verrou (7), ce qui limite le pivotement du linguet et en ce que le corps (1) du crochet est conformé de manière à permettre au verrou de pivoter d'un angle suffisant pour que son bec (9) se dégage de l'ouverture (10) du linguet en position de sécurité, mais insuffisant pour qu'il vienne en dehors du trajet du bossage (4b) de ce linguet.1. - Hook comprising a safety latch which is pivotally mounted on the body of the hook so as to be able to be applied to the spout of this hook and to close the opening thereof, and a latch which is arranged at the rear of the hook and a spout of which can engage in an opening provided in the central part of the pawl when the latter is in the safety position, characterized in that the pawl (4) comprises, at its rear part, / preferably / a boss (4b) capable of abutting against a surface / substantially tangent 9c of the latch (7), which limits the pivoting of the latch and in that the body (1) of the hook is shaped so as to allow to the bolt to pivot by an angle sufficient for its beak (9) to disengage from the opening (10) of the latch in the safety position, but insufficient for it to come outside the path of the boss (4b) of this latch. 2. - Crochet selon la revendication 1, caractérisé en ce que la partie centrale du linguet comporte une deuxième ouverture (12) dans laquelle peut s'engager le bec (9) du verrou lorsque le bossage (4a) du linguet est en appui contre ce verrou.2. - Hook according to claim 1, characterized in that the central part of the latch has a second opening (12) in which can engage the spout (9) of the latch when the boss (4a) of the latch is in abutment this lock.
EP83400216A 1982-02-02 1983-02-01 Safety hooks Withdrawn EP0085631A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8201943A FR2520711B1 (en) 1982-02-02 1982-02-02 IMPROVEMENTS ON LOCKING HOOKS
FR8201943 1982-02-02

Publications (1)

Publication Number Publication Date
EP0085631A1 true EP0085631A1 (en) 1983-08-10

Family

ID=9270735

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400216A Withdrawn EP0085631A1 (en) 1982-02-02 1983-02-01 Safety hooks

Country Status (2)

Country Link
EP (1) EP0085631A1 (en)
FR (1) FR2520711B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992007199A1 (en) * 1990-10-12 1992-04-30 Gunnebo Lifting Ab Safety lifting hook
GB2379478A (en) * 2001-04-20 2003-03-12 Steven Hong Coupling self-locking hook
USRE47349E1 (en) * 2008-01-24 2019-04-16 Nautilus Rigging Llp Hook
DE102019103517A1 (en) * 2019-02-12 2020-08-13 Pewag Austria Gmbh Safety hook
CN115215202A (en) * 2021-04-15 2022-10-21 广东博智林机器人有限公司 Hooks and hoisting devices

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1915524A (en) * 1931-04-29 1933-06-27 Fraser Joseph Cargo hook
FR1063684A (en) * 1952-09-26 1954-05-05 Carabiner applicable in particular to lifting devices
US3722943A (en) * 1971-05-12 1973-03-27 J Kalua Safety hook
AU437514B2 (en) * 1968-07-15 1973-07-03 Kannas Broks Aktiebolag Safety hook
DE2425867A1 (en) * 1973-06-01 1974-12-19 Bulten Kanthal Ab SAFETY HOOK
FR2327186A1 (en) * 1974-01-18 1977-05-06 Forges Du Creux Du Sable Lifting hook locking device - has hook with yoke in which closing finger with lifting eye pivots
FR2425400A1 (en) * 1978-05-09 1979-12-07 Beon Roger Le Safety catch for crane hook - has sprung pawl engaging notch in fork end to hold hook in closed or open position as required
FR2491901A3 (en) * 1980-10-10 1982-04-16 Charlet Sa Safety lifting hook for use with block and tackle - has pivoted closing link pivoted to part of main hooking body to lock it shut

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1915524A (en) * 1931-04-29 1933-06-27 Fraser Joseph Cargo hook
FR1063684A (en) * 1952-09-26 1954-05-05 Carabiner applicable in particular to lifting devices
AU437514B2 (en) * 1968-07-15 1973-07-03 Kannas Broks Aktiebolag Safety hook
US3722943A (en) * 1971-05-12 1973-03-27 J Kalua Safety hook
DE2425867A1 (en) * 1973-06-01 1974-12-19 Bulten Kanthal Ab SAFETY HOOK
FR2327186A1 (en) * 1974-01-18 1977-05-06 Forges Du Creux Du Sable Lifting hook locking device - has hook with yoke in which closing finger with lifting eye pivots
FR2425400A1 (en) * 1978-05-09 1979-12-07 Beon Roger Le Safety catch for crane hook - has sprung pawl engaging notch in fork end to hold hook in closed or open position as required
FR2491901A3 (en) * 1980-10-10 1982-04-16 Charlet Sa Safety lifting hook for use with block and tackle - has pivoted closing link pivoted to part of main hooking body to lock it shut

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992007199A1 (en) * 1990-10-12 1992-04-30 Gunnebo Lifting Ab Safety lifting hook
GB2379478A (en) * 2001-04-20 2003-03-12 Steven Hong Coupling self-locking hook
USRE47349E1 (en) * 2008-01-24 2019-04-16 Nautilus Rigging Llp Hook
DE102019103517A1 (en) * 2019-02-12 2020-08-13 Pewag Austria Gmbh Safety hook
DE102019103517B4 (en) * 2019-02-12 2021-04-22 Pewag Austria Gmbh Safety hook
US11142432B2 (en) 2019-02-12 2021-10-12 Pewag Austria Gmbh Safety load hook
CN115215202A (en) * 2021-04-15 2022-10-21 广东博智林机器人有限公司 Hooks and hoisting devices

Also Published As

Publication number Publication date
FR2520711A1 (en) 1983-08-05
FR2520711B1 (en) 1986-07-25

Similar Documents

Publication Publication Date Title
EP0581693B1 (en) Snap hook with roller for automatic locking
EP1465507B1 (en) Buckle for self-locking and adjustment fixing of a belt
FR2663549A1 (en) SELF-LOCKING CARABINER.
EP0024976B1 (en) Device for adjusting the inclination between two members, more particularly the two members of a vehicle seat
FR2836964A1 (en) CARABINER EQUIPPED WITH A LOCKING RING WITH SEPARATION LEG
EP1101959A1 (en) Snap-hook device, particularly for mooring boats
FR2705064A1 (en) Coupling hook for the lower arms of a tractor three-point hitch.
FR2479166A1 (en) DEVICE FOR ATTACHING A PREFABRICATED CONCRETE PIECE TO A LIFTING MACHINE
EP1498384A1 (en) Snap hook with two opposite fingers
FR2697207A1 (en) Hitch hook for the lower arm of a tractor three-point hitch.
CA2408897C (en) Quick fastening safety device for fixing a tool to the end of a loader arm or the like
EP0002396B1 (en) Load engaging hook
EP0039301B1 (en) Securing means for closure device for manhole cover
EP0420777B1 (en) Manhole cover with locked hinge
EP0115518B1 (en) Improvements to safety hooks
EP0085631A1 (en) Safety hooks
FR2485658A1 (en) CARBINER WITH AUTOMATIC LOCKING
EP1213038B1 (en) Fire hose comprising a safety device to prevent it from moving under the action of water ensuring its feeding
EP0058810A1 (en) Openable pulley block
FR2461146A1 (en) D=shaped snap hook for climber - has self-locking recoil sprung pivot gate with recoil sprung rotating locking sleeve which latches when gate is open
EP0081108B1 (en) Device to remotely pass a band around a fastening support
EP0014148B1 (en) Safety hook
EP0235475A1 (en) Spring-driven gyroscope
FR2491901A3 (en) Safety lifting hook for use with block and tackle - has pivoted closing link pivoted to part of main hooking body to lock it shut
FR2485123A1 (en) Link-chain adjusting hook - has self-locking safety catch pivoting on split bushing

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH DE GB LI SE

17P Request for examination filed

Effective date: 19830919

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850514