EP3763425B1 - Pulley with secure opening - Google Patents

Pulley with secure opening Download PDF

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Publication number
EP3763425B1
EP3763425B1 EP20181528.9A EP20181528A EP3763425B1 EP 3763425 B1 EP3763425 B1 EP 3763425B1 EP 20181528 A EP20181528 A EP 20181528A EP 3763425 B1 EP3763425 B1 EP 3763425B1
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EP
European Patent Office
Prior art keywords
flange
rotation
finger
gate
pulley
Prior art date
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Active
Application number
EP20181528.9A
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German (de)
French (fr)
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EP3763425A1 (en
Inventor
Christophe Quillard
Benoît Vuillermoz
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.)
Zedel SAS
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Zedel SAS
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Publication of EP3763425A1 publication Critical patent/EP3763425A1/en
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Publication of EP3763425B1 publication Critical patent/EP3763425B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
    • B66D3/08—Arrangements of sheaves
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63G—MERRY-GO-ROUNDS; SWINGS; ROCKING-HORSES; CHUTES; SWITCHBACKS; SIMILAR DEVICES FOR PUBLIC AMUSEMENT
    • A63G21/00—Chutes; Helter-skelters
    • A63G21/22—Suspended slideways

Definitions

  • the invention relates to a double pulley.
  • the double pulley In many fields, it is known to use a double pulley which must move on a cable.
  • the double pulley is commonly used when performing zip lines with a user sliding along the cable.
  • the double pulley has two sheaves which are mounted for rotation.
  • the cable is installed inside the pulley in contact with the two sheaves.
  • the double pulley has a connection point which is used to make the mechanical connection between the user hanging from the pulley and the cable holding the pulley.
  • the two sheaves are mounted in line so that the two sheaves run on the cable.
  • the pulley defines a housing for the cable and a slot for introducing or extracting the cable.
  • the slot By means of the slot, the cable can be introduced into the housing to come into contact with the sheaves. After use, the cable is extracted from the housing by means of the slot.
  • an openable finger which has a first position closing the slot and a second position which leaves the slot open.
  • the openable finger is rotatably mounted and the user presses the finger so as to authorize or prevent the introduction of the cable into the housing or its extraction.
  • a locking system which holds the finger in the position closing the slot.
  • the locking system is configured to prevent a simple pressure on the openable finger resulting in the opening of the slot.
  • a locking system is used in the pulley marketed by International Safety Components Ltd. under the Zippey TM name. The opening of the slot is not obtained by pressing on the opening finger but by pressing on a rod connected to the opening finger.
  • the openable finger is rotatably mounted on the rear flange to come into contact with the front flange and the locking rod protrudes from the rear flange.
  • the user presses on the rod to move it away from the sheaves, which causes the rotation of the mobile finger.
  • the double pulley is remarkable in that the blocker defines an actuation zone separated from the first flange by the finger, the rotation of the actuation zone from the blocking position to the unlocking position corresponding to a distance from the actuation zone relative to the second flange, said rotation of the actuation zone causing the pivoting of the rod.
  • the actuation zone and the rod are separated by a rotation shaft of the ascender so that said rotation of the actuation zone causes the rod to approach the sheaves.
  • the actuation zone is a concave actuation zone having a bearing wall extending from the rotation shaft in a direction parallel to the axis of rotation of the sheaves when the actuation zone is in the blocking position.
  • the concave actuation zone has an abutment wall extending from the rotation shaft in the direction of the second flange when the actuation zone is in the blocking position.
  • the abutment wall and the second flange define a slot opening into the housing intended to receive a cable, the abutment wall separating the support wall and the second flange, the slot being intended to allow passage of the cable.
  • the abutment wall is separated from the second flange by a distance less than the separation distance between the first flange and the second flange in the lodging.
  • the displacement from the locking position to the unlocking position corresponds to a rotation of the actuation zone by an angle greater than or equal to 90°.
  • the displacement from the blocking position to the unblocking position corresponds to a rotation of the actuation zone by an angle strictly greater than 95°.
  • the blocker has no zone protruding from the outer face of the first flange.
  • the finger comprises an obstacle projecting from the internal face of the second flange and directed towards the first flange when the rod is in the closed position, the distance between the obstacle and the first flange is less than 12 mm and in which the first flange is provided with a through hole or a recess arranged to allow passage of the obstacle when the finger is in the open position.
  • the finger defines a hook resting on an orifice of the second flange.
  • the invention also relates to a displacement device which provides better security than the configurations of the prior art while remaining easy to use.
  • the displacement device comprises a cable and a double pulley according to claim 1, the cable being arranged in the housing.
  • a double pulley device 1 comprises a pair of sheaves 2 which are advantageously of identical structures.
  • the pair of sheaves 2 is mounted in line.
  • Each sheave 2 is mounted for free rotation on a shaft 3.
  • the two shafts 3 are fixed to a support bracket 4.
  • the support bracket 4 is advantageously in the shape of an inverted U.
  • the support bracket 4 can be a metal support bracket.
  • the support bracket 4 can be formed by a sheet metal deformed to define a U or substantially a U.
  • the support bracket 4 can be made by assembling several elements.
  • Such a device is intended to be part of a movement device used for the air transport of a person during a zipline passage on a rope or an insurance cable.
  • the double pulley 1 runs along a fixed cable 5.
  • the support bracket 4 has a first flange 6 and a second flange 7.
  • the two sheaves 2 are mounted rotatably by means of two rotation shafts 3.
  • the two rotation shafts 3 are installed parallel to each other.
  • the two rotation shafts 3 define two axes of rotation different.
  • the two axes of rotation 3 belong to the same plane which divides each sheave 2 into two equal parts.
  • the two shafts 3 are mounted fixed on the stirrup 4.
  • the two rotation shafts 3 are fixed to the first and second flanges 6 and 7.
  • the two sheaves 2 are mounted between the first and second flanges 6 and 7.
  • the two sheaves 2 face the internal faces of the two flanges 6 and 7.
  • the double pulley 1 comprises a finger 8 which is configured to be movable between a first position and a second position.
  • the mobility of the finger 8 makes it possible to define the slot for introducing or extracting the cable 5.
  • the finger 8 closes the slot.
  • the cable 5 arranged in the housing cannot be extracted.
  • the finger 8 defines a slot with the second flange 7 to allow the introduction or extraction of the cable 5.
  • the finger 8 is spaced from the second flange 7 by a distance ensuring the passage of the cable 5.
  • the housing is partly defined by the first flange 6, the second flange 7, the finger 8 and the two sheaves 2.
  • Finger 8 is mounted to rotate between the two positions to define the slot or not.
  • the finger 8 is mounted around a rotation shaft which is fixed on the first flange 6.
  • the rotation shaft defines an axis of rotation of the finger 8 which is advantageously arranged parallel to an axis which passes through the two axes of rotation of the two sheaves 2 and which is perpendicular to the two axes of rotation of the sheaves 2.
  • a spring connected to the first flange 6 and to the finger 8.
  • the spring is configured to move the movable finger 8 towards the closed position and thus close the slot in the absence of stress.
  • the spring applies a force to the finger 8 to direct it towards the second flange 7.
  • the finger 8 is associated with a blocker 9 which ensures the locking of the finger 8 in the closed position even with mechanical stress on the finger 8.
  • the blocker 9 is mounted on the finger 8 so as to move with the movements of the finger 8.
  • the blocker 9 has an actuation zone 10 which is mounted on the finger 8.
  • the actuation zone 10 is intended to cooperate with the finger of the user.
  • the blocker 9 is mounted to move between a first position and a second position.
  • the first position of blocker 9 is a blocking position which maintains movable finger 8 in the closed position.
  • the second position of the blocker 9 is an unlocking position which allows movement of the finger 8 between the closed position and the open position.
  • the blocker 9 is mounted to move relative to the finger 8 and relative to the first flange 6.
  • the blocker 9 is mounted for rotation relative to the finger 8. It is particularly advantageous to use a blocker 9 mounted for rotation around a rotation shaft 11 which is mounted fixed on the finger 8.
  • the zone of actuation 10 is mounted for rotation around the shaft 11.
  • the axis of rotation of the blocker 9 is different from the axis of rotation of the finger 8.
  • the rotation shaft 11 of the blocker 9 defines an axis of rotation which is parallel to the axis of rotation of the movable finger 8.
  • the axis of rotation of the blocker 9 is arranged between the axis of rotation of the movable finger 8 and the point of contact with the second flange 7. In the position of blocking, the blocker 9 bears on the first flange 6 directly or indirectly by means of a rod 12.
  • the bearing grip opposes the movement of the finger 8 from the closed position to the open position.
  • the blocker 9 rests on the finger 8 by means of the rod 12. In its blocking position, the rod 12 opposes the rotation of the finger 8.
  • the blocker 9 preferably has a rod 12 mounted at rotation.
  • the blocker 9 rests on the internal face of the first flange 6, that is to say the face which is opposite the sheaves 2.
  • the blocker 9 allows the movement of the finger 8 towards the first flange 6, for example by not pressing simultaneously on the first flange 6 and on the finger 8.
  • the actuation zone 10 When moving from the locking position to the unlocking position, the actuation zone 10 moves in rotation away from the sheaves 2 and the second flange 7. The movement of the actuation zone 10 causes the displacement of the rod 12 which advantageously approaches the sheaves 2.
  • the actuation zone 10 of the blocker 9 is visible on the front face of the pulley, that is to say the face which comprises the slot.
  • the actuation zone 10 protrudes from the front face of the pulley 1 which facilitates its actuation by the user who directly sees the zone to be used to open the pulley 1.
  • This configuration makes it possible to have an ascender 9 which does not no protrusion on the outer rear face of the pulley which increases safety during use.
  • the blocker 9 is in one piece and is located partly in the housing intended to receive the cable 5.
  • the rod 12 is mounted in one piece with the actuation zone 10.
  • the rod 12 is mounted to rotate around the rotation shaft 11.
  • the rotation shaft 11 separates the rod 12 and the actuation zone 10.
  • the bearing of the rod 12 on the first flange 6 causes the locking of the finger 8 because the rotation shaft of the ascender 9 is attached to finger 8.
  • the actuation zone 10 is arranged at one end of the blocker 9 and the opposite end is formed by the rod 12 which bears against the first flange 6 when the blocker 9 is in the blocking position.
  • the rod 12 is mounted for rotation with an axis of rotation which is different from that of the actuation zone 10.
  • the rotation of the rod 12 is caused by the rotation of the actuation zone 10.
  • the rotation shaft of the rod 12 can be mounted on the first flange 6. This embodiment is less advantageous than the previous one because it requires more elements which increases the size.
  • the rod 12 is in the form of two elements which are separated by the finger 8 along the axis of rotation of the blocker 9.
  • the two projecting elements ensure better transmission of forces and can move to come adjacent to the finger in a direction parallel to the axis of rotation of the finger as shown in picture 3 .
  • the actuation zone 10 is advantageously a concave actuation zone and not a convex actuation zone.
  • the actuation zone 10 defines a recess which encourages the user to place a finger in the recess to move the blocker 9 then the finger 8.
  • the concave actuation zone 10 has an abutment wall 13 and a bearing wall 14 which represent two distinct surfaces meeting to define the concavity.
  • the abutment wall 13 covers the finger 8 extending mainly from the rotation shaft 11 towards the second flange 7, that is to say towards the two sheaves 2.
  • the abutment wall 13 extends substantially along the longitudinal axis of the finger 8 to avoid any direct contact between the user's finger and the finger 8 when the blocker 9 is in the blocking position.
  • the zone of the bearing wall 14 is arranged projecting from the finger 8 extending orthogonally to the axis of rotation of the blocker 9 and orthogonal to the longitudinal axis of the finger 8.
  • the bearing wall 14 extends from the rotation shaft 11 in a direction parallel to the axis of rotation of the sheaves 2.
  • the bearing wall is arranged projecting from the front face of the pulley, which facilitates actuation of the ascender.
  • the support zone 14 is mounted fixed relative to the abutment wall 13.
  • the abutment wall 13 covers at least 50% of the distance which separates the axis of rotation of the ascender 9 and the second flange 7 in the closed position, preferably at least 75%.
  • the abutment wall is optional in actuating the blocker from the blocking position.
  • the actuation zone 10 moves away from the two sheaves 2 and away from the second flange 7.
  • the abutment wall 13 pivots in moving away from the second flange 7. In this way, the finger of the user who moves the actuation zone 10 is naturally far from the second flange 7 which avoids obstructing the slot and will facilitate insertion or extraction of the cable 5.
  • the abutment wall 13 and the second flange 7 define a slot opening into the housing intended to receive a cable 5.
  • the wall of abutment 13 separates the support wall 14 and the second flange 7.
  • the slot is intended to allow the passage of the cable 5.
  • the abutment wall 13 When the blocker 9 is in the unlocking position and the finger 8 is in the open position, it is advantageous for the abutment wall 13 to be separated from the second flange 7 by a distance less than the separation distance between the first flange 6 and the second flange 7 in the housing.
  • the slot allows the introduction of the cable while allowing the formation of a compact blocker.
  • the inventors have observed that with a pulley provided with a pivoting finger 8, the user pushes on the finger 8 in order to bring it closer to the first flange 6 and define the slot.
  • the user's finger naturally slides towards the second flange, because of the pivoting, so that the user's finger moves towards the inside of the slot which block the slot.
  • the height of the slot must be increased and/or the separation distance between the actuation zone and the slot must be increased.
  • the Zippey TM pulley presented above uses an actuation zone arranged on the rear face of the pulley, which is less intuitive in its operation.
  • the blocker 9 remains in the unlocked position and the force applied by the user to the actuation zone 10 brings the finger 8 closer to the first flange 6 to define the slot.
  • the slot is defined at one end by the distance between the second flange 7 and the abutment wall 13 and at the other end by the distance between the second flange 7 and the finger 8. The finger of the user is protected from any contact with the cable 5 by the abutment wall 13.
  • the blocker 9 defines an end stop when moving from the first position to the second position. Once the limit stop has been reached, pressing on the actuation zone 10 results in a force on the finger 8 which moves the finger 8 from the closed position to the open position.
  • the actuation zone 10 of the blocker 9 also forms the finger actuation zone 8 so that the user's finger is able to move the blocker 9 from the blocking position to the unlocking position. and that the force applied in the unlocking position moves the finger 8.
  • the actuation zone 10 is separated from the first flange 6 by the finger 8.
  • the rotation shaft 11 of the blocker 9 is mounted between the rotation shaft of the finger 8 and the end of the finger 8 which comes into contact with the second flange 7 to close the slot.
  • the displacement of the actuation zone 10 from the blocking position to the unblocking position corresponds to a rotation of an angle greater than or equal to 90° and preferably greater than 95°.
  • a rotation makes it possible to better distinguish the movement causing the unlocking of the blocker 9 and the movement causing the opening of the slot.
  • a downward vertical movement applied to the pulley illustrated in figure 1 results in the release of the blocker 9 without opening the finger 8.
  • the same movement applied to the Zippey TM pulley causes the opening of the pulley.
  • the vertical downward movement is then associated with a horizontal movement towards the first flange 6 to open the slot.
  • Safety is improved by means of two consecutive efforts having two different orientations to obtain the opening of the pulley.
  • the mobile finger 8 has an obstacle 15 which is arranged between the first flange 6 and the second flange 7.
  • the obstacle 15 is mobile between the two flanges 6 and 7.
  • the first flange 6 defines a hole through and / or a recess 16 which cooperate with the obstacle 15.
  • the recess 16 does not extend over the entire width of the first flange 6. The width is measured along the longitudinal axis of the cable 5 or the axis perpendicular to the two axes of rotation of the sheaves 2 and passing through the two axes of rotation.
  • the obstacle 15 partially sinks into the through hole and/or into the recess 16.
  • the obstacle 15 is configured to at least partially obstruct the space between the two flanges 6 and 7 and prevent the cable 5 is located between finger 8 and first flange 6, which prevents cable 5 from being extracted.
  • the obstacle 15 cooperates with the two flanges 6 and 7 so that the obstruction length of the obstacle 15 in the housing changes depending on whether the finger 8 is in the closed position or in the open position.
  • the length is measured in the direction which crosses the first flange 6 and the second flange 7.
  • the obstruction length is greater in the closed position than in the open position. In the closed position, the obstruction length opposes the passage of the cable between the first flange 6 and the obstacle 15.
  • the distance between the obstacle 15 and the first flange 6 is less than the diameter of the cable 5.
  • the distance between the obstacle 15 and the second flange 7 is greater than the diameter of the cable 5.
  • the obstacle 15 extends a first distance from the first flange 6 towards the second flange 7.
  • the first distance is less than or equal to the minimum distance which separates the two flanges 6 and 7 in a plane parallel to the plane which contains the two axes of rotation of the sheaves 2 and which passes through the obstacle 15.
  • the difference between the first distance and the minimum distance which separates the two flanges 6 and 7 is less than the diameter of the cable 5, for example 12mm.
  • the cable 5 has a tension or a rigidity which prevents it from deforming and passing between the obstacle 15 and the first flange 6. The cable 5 remains between the obstacle 15 and the sheaves 2.
  • the obstacle 15 sinks into the recess 16 and/or into the through hole so that the distance which separates the obstacle 15 and the second flange 7 is greater than the diameter of the cable 5. This allows the insertion or extraction of the cable 5.
  • the obstacle 15 makes it possible to limit the movement of the cable 5 and prevents the cable 5 from being stuck between the finger 8 and the first flange 6. With this jamming, it is not possible to extract the cable or even to open finger 8.
  • the double pulley has an attachment point 17 which is intended to mechanically connect the user with the pulley.
  • the attachment point 17 allows the introduction of a lanyard, a strap, a rope or a carabiner.
  • the finger 8 comprises a hook 18 which cooperates with the second flange 7.
  • the hook 18 cooperates with a through hole of the second flange 7. The through hole passes through the internal wall and the external wall of the second flange 7.
  • the hook 18 bears against the side wall of the second flange 7 when the force applied to the attachment point 17 reaches a threshold value.
  • the threshold force advantageously corresponds to a user suspended from the attachment point 17.
  • the bearing of the hook 18 against the side wall of the second flange 7 prevents the opening of the slot.
  • the pulley 1 has a fixing point 17 which is located under the housing.
  • the attachment point 17 is formed by a rod 19 which extends from the first flange 6.
  • the rod 19 extends to an additional second flange 20 which is fixed to the first flange 6 by other means.
  • the connections between the rod 19, the first flange 6 and the second additional flange 20 make it possible to transmit part of the forces applied to the rod 19 to the first flange 6.
  • the first flange 6 is connected to the second flange 7 by means of a support 21.
  • the support 21 can have an upper face which defines one or two notches 22 which are arranged at the ends of the support bracket along the longitudinal axis of the cable 5.
  • Each notch 22 can be configured to hold a carabiner.
  • the notch 22 is configured to define a depression which is located between the rotation shaft 3 and the end of the support.
  • the notch 22 can be formed by an element 23 which defines a horn.
  • the rotation shaft of the movable finger 8 is mounted on a spacer 24 which is configured to offset the axis of rotation relative to the first flange 6.
  • the spacer 24 is mounted between the first flange 6 and the second additional flange 20.
  • the blocker 9 bears against the spacer 24 which is itself bears against the first flange 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Lock And Its Accessories (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Transmission Devices (AREA)
  • Emergency Lowering Means (AREA)
  • Transmissions By Endless Flexible Members (AREA)
  • Pulleys (AREA)

Description

Domaine techniqueTechnical area

L'invention concerne une poulie double.The invention relates to a double pulley.

Technique antérieurePrior technique

Dans de nombreux domaines, il est connu d'utiliser une poulie double qui doit se déplacer sur un câble. Par exemple, la poulie double est couramment utilisée lors de la réalisation de tyroliennes avec un utilisateur qui glisse le long du câble.In many fields, it is known to use a double pulley which must move on a cable. For example, the double pulley is commonly used when performing zip lines with a user sliding along the cable.

La poulie double possède deux réas qui sont montés à rotation. Le câble est installé à l'intérieur de la poulie en contact avec les deux réas. La poulie double possède un point de connexion qui sert à réaliser la connexion mécanique entre l'utilisateur suspendu à la poulie et le câble qui retient la poulie. Les deux réas sont montés en ligne de sorte que les deux réas circulent sur le câble.The double pulley has two sheaves which are mounted for rotation. The cable is installed inside the pulley in contact with the two sheaves. The double pulley has a connection point which is used to make the mechanical connection between the user hanging from the pulley and the cable holding the pulley. The two sheaves are mounted in line so that the two sheaves run on the cable.

La poulie définit un logement pour le câble et une fente d'introduction ou d'extraction du câble. Au moyen de la fente, le câble peut être introduit dans le logement pour venir en contact des réas. Après utilisation, le câble est extrait hors du logement au moyen de la fente.The pulley defines a housing for the cable and a slot for introducing or extracting the cable. By means of the slot, the cable can be introduced into the housing to come into contact with the sheaves. After use, the cable is extracted from the housing by means of the slot.

Il est connu d'avoir un doigt ouvrable qui possède une première position fermant la fente et une deuxième position qui laisse la fente ouverte. Le doigt ouvrable est monté à rotation et l'utilisateur appuie sur le doigt de manière à autoriser ou empêcher l'introduction du câble dans le logement ou son extraction.It is known to have an openable finger which has a first position closing the slot and a second position which leaves the slot open. The openable finger is rotatably mounted and the user presses the finger so as to authorize or prevent the introduction of the cable into the housing or its extraction.

Afin d'augmenter la sécurité, il est également connu d'installer un système de verrouillage qui maintient le doigt dans la position fermant la fente. Le système de verrouillage est configuré pour empêcher qu'un simple appui sur le doigt ouvrable se traduise par l'ouverture de la fente. Un système de verrouillage est utilisé dans la poulie commercialisée par la société International Safety Components Ltd. sous la dénomination Zippey™. L'ouverture de la fente n'est pas obtenue par un appui sur le doigt ouvrable mais par un appui sur une tige connectée au doigt ouvrable.In order to increase security, it is also known to install a locking system which holds the finger in the position closing the slot. The locking system is configured to prevent a simple pressure on the openable finger resulting in the opening of the slot. A locking system is used in the pulley marketed by International Safety Components Ltd. under the Zippey ™ name. The opening of the slot is not obtained by pressing on the opening finger but by pressing on a rod connected to the opening finger.

Le doigt ouvrable est monté à rotation sur le flasque arrière pour venir en contact du flasque avant et la tige de verrouillage dépasse du flasque arrière. Pour ouvrir le logement et insérer le câble, l'utilisateur appuie sur la tige pour l'éloigner des réas ce qui cause la rotation du doigt mobile.The openable finger is rotatably mounted on the rear flange to come into contact with the front flange and the locking rod protrudes from the rear flange. To open the housing and insert the cable, the user presses on the rod to move it away from the sheaves, which causes the rotation of the mobile finger.

A l'usage, il ressort que l'utilisation d'une telle poulie n'est pas satisfaisante. La tige dépassant du flasque arrière, elle n'est pas immédiatement visible de sorte que l'utilisateur ne comprend pas intuitivement comment ouvrir la poulie. Par ailleurs, lorsque l'utilisateur glisse le long du câble et s'accroche à la poulie, ses doigts s'accrochent à la tige et ont tendance à déplacer le doigt mobile dans le sens de l'ouverture de la fente ce qui n'est pas le but recherché. Il en va de même pour tout élément qui glisse le long du flasque arrière et qui peut s'accrocher à la tige de verrouillage possédant un crochet.In use, it appears that the use of such a pulley is not satisfactory. The rod protruding from the rear flange, it is not immediately visible so that the user does not intuitively understand how to open the pulley. Moreover, when the user slides along the cable and clings to the pulley, his fingers cling to the rod and tend to move the mobile finger in the direction of the opening of the slot, which does not is not the desired goal. The same applies to any element which slides along the rear flange and which can catch on the locking rod having a hook.

Le document GB 2 522 553 A dévoile les caractéristiques du préambule de la revendication 1.The document GB 2 522 553 A discloses the features of the preamble of claim 1.

Objet de l'inventionObject of the invention

Un objet de l'invention consiste à prévoir une poulie double qui possède un mécanisme de verrouillage qui est plus facile à utiliser tout en procurant une sécurité améliorée. A cet effet, la poulie double selon l'invention comprend les caractéristiques de la revendicaton 1. La poulie comporte :

  • un premier flasque et un deuxième flasque ayant chacun une face interne et une face externe,
  • une paire de réas montés en ligne entre le premier flasque et le deuxième flasque,
  • un doigt monté mobile en rotation par rapport au premier flasque entre une position fermée et une position ouverte, le doigt venant en contact du deuxième flasque dans la position fermée,
  • un logement destiné à recevoir un câble, le logement étant délimité par le premier flasque, le deuxième flasque, la paire de réas et le doigt, le doigt fermant le logement dans la position fermée et définissant une fente dans la position ouverte,
  • un bloqueur monté sur le doigt, le bloqueur étant monté mobile en rotation entre une position de blocage verrouillant le doigt dans la position fermée et une position de déblocage autorisant le déplacement du doigt entre la position fermée et la position ouverte, le bloqueur possédant une tige prenant appui sur le premier flasque et sur le doigt dans la position de blocage.
An object of the invention is to provide a double pulley which has a locking mechanism which is easier to use while providing improved security. To this end, the double pulley according to the invention comprises the characteristics of claim 1. The pulley comprises:
  • a first flange and a second flange each having an internal face and an external face,
  • a pair of sheaves mounted in line between the first flange and the second flange,
  • a finger mounted mobile in rotation relative to the first flange between a closed position and an open position, the finger coming into contact with the second flange in the closed position,
  • a housing intended to receive a cable, the housing being delimited by the first flange, the second flange, the pair of sheaves and the finger, the finger closing the housing in the closed position and defining a slot in the open position,
  • a blocker mounted on the finger, the blocker being mounted rotatably between a blocking position locking the finger in the closed position and an unlocking position allowing the movement of the finger between the closed position and the open position, the blocker having a rod building on the first flange and on the finger in the blocking position.

La poulie double est remarquable en ce que le bloqueur définit une zone d'actionnement séparée du premier flasque par le doigt, la rotation de la zone d'actionnement depuis la position de blocage jusqu'à la position de déblocage correspondant à un éloignement de la zone d'actionnement par rapport au deuxième flasque, ladite rotation de la zone d'actionnement causant le pivotement de la tige.The double pulley is remarkable in that the blocker defines an actuation zone separated from the first flange by the finger, the rotation of the actuation zone from the blocking position to the unlocking position corresponding to a distance from the actuation zone relative to the second flange, said rotation of the actuation zone causing the pivoting of the rod.

Dans un développement, la zone d'actionnement et la tige sont séparées par un arbre de rotation du bloqueur de sorte que ladite rotation de la zone d'actionnement cause le rapprochement de la tige vers les réas.In one development, the actuation zone and the rod are separated by a rotation shaft of the ascender so that said rotation of the actuation zone causes the rod to approach the sheaves.

De manière avantageuse, la zone d'actionnement est une zone d'actionnement concave possédant une paroi d'appui s'étendant depuis l'arbre de rotation selon une direction parallèle à l'axe de rotation des réas lorsque la zone d'actionnement est dans la position de blocage.Advantageously, the actuation zone is a concave actuation zone having a bearing wall extending from the rotation shaft in a direction parallel to the axis of rotation of the sheaves when the actuation zone is in the blocking position.

Préférentiellement, la zone d'actionnement concave possède une paroi de butée s'étendant depuis l'arbre de rotation en direction du deuxième flasque lorsque la zone d'actionnement est dans la position de blocage.Preferably, the concave actuation zone has an abutment wall extending from the rotation shaft in the direction of the second flange when the actuation zone is in the blocking position.

Dans un développement, lorsque le bloqueur est dans la position de déblocage et que le doigt est dans la position ouverte, la paroi de butée et le deuxième flasque définissent une fente débouchant dans le logement destiné à recevoir un câble, la paroi de butée séparant la paroi d'appui et le deuxième flasque, la fente étant destinée à autoriser le passage du câble.In a development, when the blocker is in the unlocking position and the finger is in the open position, the abutment wall and the second flange define a slot opening into the housing intended to receive a cable, the abutment wall separating the support wall and the second flange, the slot being intended to allow passage of the cable.

Avantageusement, lorsque le bloqueur est dans la position de déblocage et que le doigt est dans la position ouverte, la paroi de butée est séparée du deuxième flasque d'une distance inférieure à la distance de séparation entre le premier flasque et le deuxième flasque dans le logement.Advantageously, when the blocker is in the unlocking position and the finger is in the open position, the abutment wall is separated from the second flange by a distance less than the separation distance between the first flange and the second flange in the lodging.

Dans un mode de réalisation particulier, le déplacement de la position de blocage à la position de déblocage correspond à une rotation de la zone d'actionnement d'un angle supérieur ou égal à 90°.In a particular embodiment, the displacement from the locking position to the unlocking position corresponds to a rotation of the actuation zone by an angle greater than or equal to 90°.

Dans une configuration, le déplacement de la position de blocage à la position de déblocage correspond à une rotation de la zone d'actionnement d'un angle strictement supérieur à 95°.In one configuration, the displacement from the blocking position to the unblocking position corresponds to a rotation of the actuation zone by an angle strictly greater than 95°.

Préférentiellement, le bloqueur est dépourvu de zone en saillie de la face externe du premier flasque.Preferably, the blocker has no zone protruding from the outer face of the first flange.

Dans un autre développement, le doigt comporte un obstacle en saillie de la face interne du deuxième flasque et dirigé vers le premier flasque lorsque la tige est dans la position fermée, la distance entre l'obstacle et le premier flasque est inférieure à 12mm et dans laquelle le premier flasque est muni d'un trou traversant ou d'un renfoncement agencé pour autoriser le passage de l'obstacle lorsque le doigt est dans la position ouverte.In another development, the finger comprises an obstacle projecting from the internal face of the second flange and directed towards the first flange when the rod is in the closed position, the distance between the obstacle and the first flange is less than 12 mm and in which the first flange is provided with a through hole or a recess arranged to allow passage of the obstacle when the finger is in the open position.

De manière préférentielle, le doigt définit un crochet prenant appui sur un orifice du deuxième flasque.Preferably, the finger defines a hook resting on an orifice of the second flange.

L'invention a également pour objet un dispositif de déplacement qui assure une meilleure sécurité que les configurations de l'art antérieur tout en restant facile à utiliser.The invention also relates to a displacement device which provides better security than the configurations of the prior art while remaining easy to use.

A cet effet, le dispositif de déplacement comporte un câble et une poulie double selon la revendication 1, le câble étant disposé dans le logement.To this end, the displacement device comprises a cable and a double pulley according to claim 1, the cable being arranged in the housing.

Description sommaire des dessinsBrief description of the drawings

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre de modes particuliers de réalisation et de mise en œuvre de l'invention donnés à titre d'exemples non limitatifs et représentés aux dessins annexés, dans lesquels :

  • la figure 1 illustre, de manière schématique, une poulie double avec un doigt en position fermée et le bloqueur en position de blocage, un câble étant disposé dans le logement en contact avec les réas ;
  • la figure 2 représente de manière schématique, une vue de côté d'une poulie double avec le doigt en position fermée et le bloqueur en position de blocage, un câble étant disposé dans le logement en contact avec les réas ;
  • la figure 3 représente de manière schématique, une vue de côté d'une poulie double avec le doigt en position fermée et le bloqueur en position de déblocage ;
  • la figure 4 représente de manière schématique, une vue de côté d'une poulie double avec le doigt en position ouverte et le bloqueur en position de déblocage, le câble s'insérant dans le logement de la poulie double.
Other advantages and characteristics will emerge more clearly from the following description of particular embodiments and implementations. of the invention given by way of non-limiting examples and shown in the accompanying drawings, in which:
  • the figure 1 schematically illustrates a double pulley with a finger in the closed position and the ascender in the locking position, a cable being arranged in the housing in contact with the sheaves;
  • the picture 2 schematically shows a side view of a double pulley with the finger in the closed position and the ascender in the locking position, a cable being arranged in the housing in contact with the sheaves;
  • the figure 3 schematically shows a side view of a double pulley with the finger in the closed position and the ascender in the unlocking position;
  • the figure 4 schematically represents a side view of a double pulley with the gate in the open position and the ascender in the unlocking position, the cable being inserted into the housing of the double pulley.

Description des modes de réalisationDescription of embodiments

Comme illustré sur les figures 1 à 4, un dispositif de poulie double 1 comporte une paire de réas 2 qui sont avantageusement de structures identiques. La paire de réas 2 est montée en ligne. Chaque réa 2 est monté à rotation libre sur un arbre 3. Les deux arbres 3 sont fixés sur un étrier de support 4. L'étrier de support 4 est avantageusement en forme de U renversé. L'étrier de support 4 peut être un étrier de support métallique. L'étrier de support 4 peut être formé par une tôle déformée pour définir un U ou sensiblement un U. L'étrier de support 4 peut être réalisé par un assemblage de plusieurs éléments.As illustrated on the figures 1 to 4 , a double pulley device 1 comprises a pair of sheaves 2 which are advantageously of identical structures. The pair of sheaves 2 is mounted in line. Each sheave 2 is mounted for free rotation on a shaft 3. The two shafts 3 are fixed to a support bracket 4. The support bracket 4 is advantageously in the shape of an inverted U. The support bracket 4 can be a metal support bracket. The support bracket 4 can be formed by a sheet metal deformed to define a U or substantially a U. The support bracket 4 can be made by assembling several elements.

Un tel dispositif est destiné à faire partie d'un dispositif de déplacement utilisé pour le transport aérien d'une personne lors d'un passage en tyrolienne sur une corde ou un câble d'assurance. La poulie double 1 circule le long d'un câble 5 fixe.Such a device is intended to be part of a movement device used for the air transport of a person during a zipline passage on a rope or an insurance cable. The double pulley 1 runs along a fixed cable 5.

L'étrier de support 4 possède un premier flasque 6 et un deuxième flasque 7.The support bracket 4 has a first flange 6 and a second flange 7.

Les deux réas 2, sont montés mobiles en rotation au moyen de deux arbres de rotation 3. Les deux arbres de rotation 3 sont installés parallèlement l'un par rapport à l'autre. Les deux arbres de rotation 3 définissent deux axes de rotation différents. Dans le mode de réalisation illustré, les deux axes de rotation 3 appartiennent à un même plan qui divise chaque réa 2 en deux parties égales. De manière avantageuse, les deux arbres 3 sont montés fixes sur l'étrier 4.The two sheaves 2 are mounted rotatably by means of two rotation shafts 3. The two rotation shafts 3 are installed parallel to each other. The two rotation shafts 3 define two axes of rotation different. In the illustrated embodiment, the two axes of rotation 3 belong to the same plane which divides each sheave 2 into two equal parts. Advantageously, the two shafts 3 are mounted fixed on the stirrup 4.

Les deux arbres de rotation 3 sont fixés aux premier et deuxième flasques 6 et 7. Les deux réas 2 sont montés entre les premier et deuxième flasques 6 et 7. Les deux réas 2 font faces aux faces internes des deux flasques 6 et 7.The two rotation shafts 3 are fixed to the first and second flanges 6 and 7. The two sheaves 2 are mounted between the first and second flanges 6 and 7. The two sheaves 2 face the internal faces of the two flanges 6 and 7.

La poulie double 1 comporte un doigt 8 qui est configuré pour être mobile entre une première position et une deuxième position. La mobilité du doigt 8 permet de définir la fente d'introduction ou d'extraction du câble 5. Dans la première position ou position fermée, le doigt 8 ferme la fente. Le câble 5 disposé dans le logement ne peut pas être extrait. Dans la deuxième position ou position ouverte, le doigt 8 définit une fente avec le deuxième flasque 7 pour autoriser l'introduction ou l'extraction du câble 5. Le doigt 8 est espacé du deuxième flasque 7 d'une distance assurant le passage du câble 5.The double pulley 1 comprises a finger 8 which is configured to be movable between a first position and a second position. The mobility of the finger 8 makes it possible to define the slot for introducing or extracting the cable 5. In the first position or closed position, the finger 8 closes the slot. The cable 5 arranged in the housing cannot be extracted. In the second position or open position, the finger 8 defines a slot with the second flange 7 to allow the introduction or extraction of the cable 5. The finger 8 is spaced from the second flange 7 by a distance ensuring the passage of the cable 5.

Le logement est défini en partie par le premier flasque 6, le deuxième flasque 7, le doigt 8 et les deux réas 2.The housing is partly defined by the first flange 6, the second flange 7, the finger 8 and the two sheaves 2.

Le doigt 8 est monté à rotation entre les deux positions pour définir ou non la fente. Le doigt 8 est monté autour d'un arbre de rotation qui est fixé sur le premier flasque 6. L'arbre de rotation définit un axe de rotation du doigt 8 qui est avantageusement disposé parallèle à un axe qui passe par les deux axes de rotation des deux réas 2 et qui est perpendiculaire aux deux axes de rotation des réas 2.Finger 8 is mounted to rotate between the two positions to define the slot or not. The finger 8 is mounted around a rotation shaft which is fixed on the first flange 6. The rotation shaft defines an axis of rotation of the finger 8 which is advantageously arranged parallel to an axis which passes through the two axes of rotation of the two sheaves 2 and which is perpendicular to the two axes of rotation of the sheaves 2.

Il est avantageux d'utiliser un ressort connecté au premier flasque 6 et au doigt 8. Le ressort est configuré pour déplacer le doigt mobile 8 vers la position fermée et ainsi fermer la fente en l'absence de sollicitation. Le ressort applique une force sur le doigt 8 pour le diriger vers le deuxième flasque 7.It is advantageous to use a spring connected to the first flange 6 and to the finger 8. The spring is configured to move the movable finger 8 towards the closed position and thus close the slot in the absence of stress. The spring applies a force to the finger 8 to direct it towards the second flange 7.

Le doigt 8 est associé à un bloqueur 9 qui assure le verrouillage du doigt 8 dans la position fermée même avec une sollicitation mécanique du doigt 8. Le bloqueur 9 est monté sur le doigt 8 de manière à se déplacer avec les mouvements du doigt 8. Le bloqueur 9 possède une zone d'actionnement 10 qui est montée sur le doigt 8. La zone d'actionnement 10 est destinée à coopérer avec le doigt de l'utilisateur. Le bloqueur 9 est monté mobile entre une première position et une deuxième position. La première position du bloqueur 9 est une position de blocage qui maintient le doigt mobile 8 dans la position fermée. La deuxième position du bloqueur 9 est une position de déblocage qui autorise le déplacement du doigt 8 entre la position fermée et la position ouverte. Le bloqueur 9 est monté mobile par rapport au doigt 8 et par rapport au premier flasque 6.The finger 8 is associated with a blocker 9 which ensures the locking of the finger 8 in the closed position even with mechanical stress on the finger 8. The blocker 9 is mounted on the finger 8 so as to move with the movements of the finger 8. The blocker 9 has an actuation zone 10 which is mounted on the finger 8. The actuation zone 10 is intended to cooperate with the finger of the user. The blocker 9 is mounted to move between a first position and a second position. The first position of blocker 9 is a blocking position which maintains movable finger 8 in the closed position. The second position of the blocker 9 is an unlocking position which allows movement of the finger 8 between the closed position and the open position. The blocker 9 is mounted to move relative to the finger 8 and relative to the first flange 6.

De manière avantageuse, le bloqueur 9 est monté à rotation par rapport au doigt 8. Il est particulièrement avantageux d'utiliser un bloqueur 9 monté à rotation autour d'un arbre de rotation 11 qui est monté fixe sur le doigt 8. La zone d'actionnement 10 est montée à rotation autour de l'arbre 11. L'axe de rotation du bloqueur 9 est différent de l'axe de rotation du doigt 8. Par exemple, l'arbre de rotation 11 du bloqueur 9 définit un axe de rotation qui est parallèle à l'axe de rotation du doigt mobile 8. L'axe de rotation du bloqueur 9 est disposé entre l'axe de rotation du doigt mobile 8 et le point de contact avec le deuxième flasque 7. Dans la position de blocage, le bloqueur 9 prend appui sur le premier flasque 6 directement ou indirectement au moyen d'une tige 12. La prise d'appui s'oppose au déplacement du doigt 8 depuis la position fermée vers la position ouverte. Dans une autre configuration, le bloqueur 9 prend appui sur le doigt 8 au moyen de la tige 12. Dans sa position de blocage, la tige 12 s'oppose à la rotation du doigt 8. Le bloqueur 9 possède préférentiellement une tige 12 montée à rotation. De manière avantageuse, dans la position de blocage, le bloqueur 9 prend appui sur la face interne du premier flasque 6, c'est-à-dire la face qui est en vis-à-vis des réas 2.Advantageously, the blocker 9 is mounted for rotation relative to the finger 8. It is particularly advantageous to use a blocker 9 mounted for rotation around a rotation shaft 11 which is mounted fixed on the finger 8. The zone of actuation 10 is mounted for rotation around the shaft 11. The axis of rotation of the blocker 9 is different from the axis of rotation of the finger 8. For example, the rotation shaft 11 of the blocker 9 defines an axis of rotation which is parallel to the axis of rotation of the movable finger 8. The axis of rotation of the blocker 9 is arranged between the axis of rotation of the movable finger 8 and the point of contact with the second flange 7. In the position of blocking, the blocker 9 bears on the first flange 6 directly or indirectly by means of a rod 12. The bearing grip opposes the movement of the finger 8 from the closed position to the open position. In another configuration, the blocker 9 rests on the finger 8 by means of the rod 12. In its blocking position, the rod 12 opposes the rotation of the finger 8. The blocker 9 preferably has a rod 12 mounted at rotation. Advantageously, in the blocking position, the blocker 9 rests on the internal face of the first flange 6, that is to say the face which is opposite the sheaves 2.

Dans la position de déblocage, le bloqueur 9 autorise le déplacement du doigt 8 vers le premier flasque 6 par exemple en ne prenant pas appui simultanément sur le premier flasque 6 et sur le doigt 8.In the unlocking position, the blocker 9 allows the movement of the finger 8 towards the first flange 6, for example by not pressing simultaneously on the first flange 6 and on the finger 8.

Lors du déplacement de la position de blocage jusqu'à la position de déblocage, la zone d'actionnement 10 se déplace en rotation en s'éloignant des réas 2 et du deuxième flasque 7. Le déplacement de la zone d'actionnement 10 cause le déplacement de la tige 12 qui avantageusement se rapproche des réas 2.When moving from the locking position to the unlocking position, the actuation zone 10 moves in rotation away from the sheaves 2 and the second flange 7. The movement of the actuation zone 10 causes the displacement of the rod 12 which advantageously approaches the sheaves 2.

La zone d'actionnement 10 du bloqueur 9 est visible sur la face avant de la poulie, c'est-à-dire la face qui comporte la fente. La zone d'actionnement 10 fait saillie de la face avant de la poulie 1 ce qui facilite son actionnement par l'utilisateur qui voit directement la zone à utiliser pour ouvrir la poulie 1. Cette configuration permet d'avoir un bloqueur 9 qui ne fait pas saillie sur la face arrière externe de la poulie ce qui augmente la sécurité en cours d'utilisation.The actuation zone 10 of the blocker 9 is visible on the front face of the pulley, that is to say the face which comprises the slot. The actuation zone 10 protrudes from the front face of the pulley 1 which facilitates its actuation by the user who directly sees the zone to be used to open the pulley 1. This configuration makes it possible to have an ascender 9 which does not no protrusion on the outer rear face of the pulley which increases safety during use.

Dans la configuration illustrée, le bloqueur 9 est monobloc et se situe en partie dans le logement destiné à recevoir le câble 5. La tige 12 est montée monobloc avec la zone d'actionnement 10. La tige 12 est montée à rotation autour de l'arbre de rotation 11. L'arbre de rotation 11 sépare la tige 12 et la zone d'actionnement 10. La prise d'appui de la tige 12 sur le premier flasque 6 entraine le blocage du doigt 8 car l'arbre de rotation du bloqueur 9 est fixé au doigt 8.In the configuration illustrated, the blocker 9 is in one piece and is located partly in the housing intended to receive the cable 5. The rod 12 is mounted in one piece with the actuation zone 10. The rod 12 is mounted to rotate around the rotation shaft 11. The rotation shaft 11 separates the rod 12 and the actuation zone 10. The bearing of the rod 12 on the first flange 6 causes the locking of the finger 8 because the rotation shaft of the ascender 9 is attached to finger 8.

Avantageusement, la zone d'actionnement 10 est disposée à une extrémité du bloqueur 9 et l'extrémité opposée est formée par la tige 12 qui vient en appui sur le premier flasque 6 lorsque le bloqueur 9 est dans la position de blocage.Advantageously, the actuation zone 10 is arranged at one end of the blocker 9 and the opposite end is formed by the rod 12 which bears against the first flange 6 when the blocker 9 is in the blocking position.

Dans une alternative de réalisation non illustrée, la tige 12 est montée à rotation avec un axe de rotation qui est différent de celui de la zone d'actionnement 10. La rotation de la tige 12 est causée par la rotation de la zone d'actionnement 10. L'arbre de rotation de la tige 12 peut être monté sur le premier flasque 6. Ce mode de réalisation est moins avantageux que le précédent car il nécessite plus d'éléments ce qui augmente l'encombrement.In an alternative embodiment not shown, the rod 12 is mounted for rotation with an axis of rotation which is different from that of the actuation zone 10. The rotation of the rod 12 is caused by the rotation of the actuation zone 10. The rotation shaft of the rod 12 can be mounted on the first flange 6. This embodiment is less advantageous than the previous one because it requires more elements which increases the size.

Préférentiellement, la tige 12 est sous la forme de deux éléments qui sont séparés par le doigt 8 selon l'axe de rotation du bloqueur 9. Les deux éléments en saillie assurent une meilleure transmission des efforts et peuvent se déplacer pour venir adjacents au doigt selon une direction parallèle à l'axe de rotation du doigt comme cela est illustré à la figure 3.Preferably, the rod 12 is in the form of two elements which are separated by the finger 8 along the axis of rotation of the blocker 9. The two projecting elements ensure better transmission of forces and can move to come adjacent to the finger in a direction parallel to the axis of rotation of the finger as shown in picture 3 .

La zone d'actionnement 10 est avantageusement une zone d'actionnement concave et non une zone d'actionnement convexe. La zone d'actionnement 10 définit un renfoncement qui incite l'utilisateur à placer un doigt dans le renfoncement pour déplacer le bloqueur 9 puis le doigt 8.The actuation zone 10 is advantageously a concave actuation zone and not a convex actuation zone. The actuation zone 10 defines a recess which encourages the user to place a finger in the recess to move the blocker 9 then the finger 8.

La zone d'actionnement concave 10 possède une paroi de butée 13 et une paroi d'appui 14 qui représentent deux surfaces distinctes se rencontrant pour définir la concavité. Dans la position de blocage, la paroi de butée 13 recouvre le doigt 8 en s'étendant principalement depuis l'arbre de rotation 11 vers le deuxième flasque 7, c'est-à-dire vers les deux réas 2. La paroi de butée 13 s'étend sensiblement selon l'axe longitudinal du doigt 8 pour éviter tout contact direct entre le doigt de l'utilisateur et le doigt 8 lorsque le bloqueur 9 est dans la position de blocage. La zone de La paroi d'appui 14 est agencée en saillie du doigt 8 en s'étendant orthogonalement à l'axe de rotation du bloqueur 9 et orthogonalement à l'axe longitudinal du doigt 8. La paroi d'appui 14 s'étend depuis l'arbre de rotation 11 selon une direction parallèle à l'axe de rotation des réas 2. La paroi d'appui est disposée en saillie de la face avant de la poulie ce qui facilite l'actionnement du bloqueur. La zone d'appui 14 est montée fixe par rapport à la paroi de butée 13. De manière avantageuse, la paroi de butée 13 recouvre au moins 50% de la distance qui sépare l'axe de rotation du bloqueur 9 et le deuxième flasque 7 dans la position fermée, de préférence au moins 75%.The concave actuation zone 10 has an abutment wall 13 and a bearing wall 14 which represent two distinct surfaces meeting to define the concavity. In the blocking position, the abutment wall 13 covers the finger 8 extending mainly from the rotation shaft 11 towards the second flange 7, that is to say towards the two sheaves 2. The abutment wall 13 extends substantially along the longitudinal axis of the finger 8 to avoid any direct contact between the user's finger and the finger 8 when the blocker 9 is in the blocking position. The zone of the bearing wall 14 is arranged projecting from the finger 8 extending orthogonally to the axis of rotation of the blocker 9 and orthogonal to the longitudinal axis of the finger 8. The bearing wall 14 extends from the rotation shaft 11 in a direction parallel to the axis of rotation of the sheaves 2. The bearing wall is arranged projecting from the front face of the pulley, which facilitates actuation of the ascender. The support zone 14 is mounted fixed relative to the abutment wall 13. Advantageously, the abutment wall 13 covers at least 50% of the distance which separates the axis of rotation of the ascender 9 and the second flange 7 in the closed position, preferably at least 75%.

La paroi de butée est facultative dans l'actionnement du bloqueur depuis la position de blocage. Lors du déplacement du bloqueur 9 depuis la position de blocage vers la position de déblocage, la zone d'actionnement 10 se déplace en s'éloignant des deux réas 2 et en s'éloignant du deuxième flasque 7. La paroi de butée 13 pivote en s'éloignant du deuxième flasque 7. De cette manière, le doigt de l'utilisateur qui déplace la zone d'actionnement 10 est naturellement éloigné du deuxième flasque 7 ce qui évite d'obstruer la fente et facilitera insertion ou l'extraction du câble 5. La paroi de butée 13 et le deuxième flasque 7 définissent une fente débouchant dans le logement destiné à recevoir un câble 5. La paroi de butée 13 sépare la paroi d'appui 14 et le deuxième flasque 7. La fente est destinée à autoriser le passage du câble 5.The abutment wall is optional in actuating the blocker from the blocking position. When the blocker 9 moves from the blocking position to the unlocking position, the actuation zone 10 moves away from the two sheaves 2 and away from the second flange 7. The abutment wall 13 pivots in moving away from the second flange 7. In this way, the finger of the user who moves the actuation zone 10 is naturally far from the second flange 7 which avoids obstructing the slot and will facilitate insertion or extraction of the cable 5. The abutment wall 13 and the second flange 7 define a slot opening into the housing intended to receive a cable 5. The wall of abutment 13 separates the support wall 14 and the second flange 7. The slot is intended to allow the passage of the cable 5.

Lorsque le bloqueur 9 est dans la position de déblocage et que le doigt 8 est dans la position ouverte, il est avantageux que la paroi de butée 13 soit séparée du deuxième flasque 7 d'une distance inférieure à la distance de séparation entre le premier flasque 6 et le deuxième flasque 7 dans le logement. La fente autorise l'introduction du câble tout en permettant de former un bloqueur compact.When the blocker 9 is in the unlocking position and the finger 8 is in the open position, it is advantageous for the abutment wall 13 to be separated from the second flange 7 by a distance less than the separation distance between the first flange 6 and the second flange 7 in the housing. The slot allows the introduction of the cable while allowing the formation of a compact blocker.

Les inventeurs ont observé qu'avec une poulie munie d'un doigt 8 pivotant, l'utilisateur pousse sur le doigt 8 afin de le rapprocher du premier flasque 6 et définir la fente. Cependant, lors de cet appui pour ouvrir la poulie 1, le doigt de l'utilisateur glisse naturellement vers le deuxième flasque, à cause du pivotement, de sorte que le doigt de l'utilisateur se déplace vers l'intérieur de la fente ce qui obstrue la fente. Pour éliminer ou réduire ce désagrément, la hauteur de la fente doit être augmentée et/ou la distance de séparation entre la zone d'actionnement et la fente doit être augmentée. Pour contourner ce problème, la poulie Zippey™ présentée plus haut utilise une zone d'actionnement disposée sur la face arrière de la poulie ce qui est moins intuitif dans son fonctionnement.The inventors have observed that with a pulley provided with a pivoting finger 8, the user pushes on the finger 8 in order to bring it closer to the first flange 6 and define the slot. However, during this pressing to open the pulley 1, the user's finger naturally slides towards the second flange, because of the pivoting, so that the user's finger moves towards the inside of the slot which block the slot. To eliminate or reduce this inconvenience, the height of the slot must be increased and/or the separation distance between the actuation zone and the slot must be increased. To circumvent this problem, the Zippey ™ pulley presented above uses an actuation zone arranged on the rear face of the pulley, which is less intuitive in its operation.

Au contraire, au moyen de la zone d'actionnement 10 concave, lorsque l'utilisateur appuie sur la zone d'actionnement 10 pour déplacer le doigt 8, la zone de butée 13 s'oppose au glissement du doigt de l'utilisateur. L'appui appliqué sur le doigt 8 pour faire pivoter le doigt 8 est dirigé différemment de la rotation de la zone d'actionnement 10.On the contrary, by means of the concave actuation zone 10, when the user presses on the actuation zone 10 to move the finger 8, the abutment zone 13 opposes the sliding of the user's finger. The pressure applied to the finger 8 to cause the finger 8 to pivot is directed differently from the rotation of the actuation zone 10.

Le bloqueur 9 reste dans la position de déblocage et l'effort appliqué par l'utilisateur sur la zone d'actionnement 10 rapproche le doigt 8 du premier flasque 6 pour définir la fente. Dans une configuration avantageuse, la fente est définie à une extrémité par la distance entre le deuxième flasque 7 et la paroi de butée 13 et à l'autre extrémité par la distance entre le deuxième flasque 7 et le doigt 8. Le doigt de l'utilisateur est protégé de tout contact avec le câble 5 par la paroi de butée 13.The blocker 9 remains in the unlocked position and the force applied by the user to the actuation zone 10 brings the finger 8 closer to the first flange 6 to define the slot. In an advantageous configuration, the slot is defined at one end by the distance between the second flange 7 and the abutment wall 13 and at the other end by the distance between the second flange 7 and the finger 8. The finger of the user is protected from any contact with the cable 5 by the abutment wall 13.

Dans un mode de réalisation préférentiel, le bloqueur 9 définit une butée de fin de course lors du déplacement depuis la première position jusqu'à la deuxième position. Une fois la butée de fin de course atteinte, l'appui sur la zone d'actionnement 10 se traduit par un effort sur le doigt 8 ce qui déplace le doigt 8 depuis la position fermée jusqu'à la position ouverte.In a preferred embodiment, the blocker 9 defines an end stop when moving from the first position to the second position. Once the limit stop has been reached, pressing on the actuation zone 10 results in a force on the finger 8 which moves the finger 8 from the closed position to the open position.

La zone d'actionnement 10 du bloqueur 9 forme également la zone d'actionnement du doigt 8 de manière à ce que le doigt de l'utilisateur soit en mesure de déplacer le bloqueur 9 depuis la position de blocage jusqu'à la position de déblocage et que l'effort appliqué dans la position de déblocage déplace le doigt 8.The actuation zone 10 of the blocker 9 also forms the finger actuation zone 8 so that the user's finger is able to move the blocker 9 from the blocking position to the unlocking position. and that the force applied in the unlocking position moves the finger 8.

Dans la configuration illustrée, la zone d'actionnement 10 est séparée du premier flasque 6 par le doigt 8. L'arbre de rotation 11 du bloqueur 9 est monté entre l'arbre de rotation du doigt 8 et l'extrémité du doigt 8 qui vient en contact avec le deuxième flasque 7 pour fermer la fente.In the configuration illustrated, the actuation zone 10 is separated from the first flange 6 by the finger 8. The rotation shaft 11 of the blocker 9 is mounted between the rotation shaft of the finger 8 and the end of the finger 8 which comes into contact with the second flange 7 to close the slot.

De manière avantageuse, le déplacement de la zone d'actionnement 10 depuis la position de blocage jusqu'à la position de déblocage correspond à une rotation d'un angle supérieur ou égal à 90° et préférentiellement supérieur à 95°. Une telle rotation permet de mieux distinguer le mouvement causant le déblocage du bloqueur 9 et le mouvement causant l'ouverture de la fente. Ainsi, un mouvement vertical orienté vers le bas appliqué sur la poulie illustrée à la figure 1 se traduit par le déblocage du bloqueur 9 sans ouverture du doigt 8. Le même mouvement appliqué sur la poulie Zippey™ cause l'ouverture de la poulie. Dans la poulie illustrée à la figure 1, le mouvement vertical vers le bas est ensuite associé à un mouvement horizontal vers le premier flasque 6 pour ouvrir la fente. La sécurité est améliorée au moyen de deux efforts consécutifs ayant deux orientations différentes pour obtenir l'ouverture de la poulie.Advantageously, the displacement of the actuation zone 10 from the blocking position to the unblocking position corresponds to a rotation of an angle greater than or equal to 90° and preferably greater than 95°. Such a rotation makes it possible to better distinguish the movement causing the unlocking of the blocker 9 and the movement causing the opening of the slot. Thus, a downward vertical movement applied to the pulley illustrated in figure 1 results in the release of the blocker 9 without opening the finger 8. The same movement applied to the Zippey ™ pulley causes the opening of the pulley. In the pulley shown in figure 1 , the vertical downward movement is then associated with a horizontal movement towards the first flange 6 to open the slot. Safety is improved by means of two consecutive efforts having two different orientations to obtain the opening of the pulley.

Dans un mode de réalisation particulier, le doigt mobile 8 possède un obstacle 15 qui est disposé entre le premier flasque 6 et le deuxième flasque 7. L'obstacle 15 est mobile entre les deux flasques 6 et 7. Le premier flasque 6 définit un trou traversant et/ou un renfoncement 16 qui coopèrent avec l'obstacle 15. Le renfoncement 16 ne s'étend pas sur toute la largeur du premier flasque 6. La largeur est mesurée selon l'axe longitudinal du câble 5 ou l'axe perpendiculaire aux deux axes de rotation des réas 2 et passant par les deux axes de rotation. Dans la position ouverte, l'obstacle 15 s'enfonce partiellement dans le trou traversant et/ou dans le renfoncement 16. L'obstacle 15 est configuré pour obstruer au moins partiellement l'espace entre les deux flasques 6 et 7 et empêcher que le câble 5 se trouve entre le doigt 8 et le premier flasque 6 ce qui empêche l'extraction du câble 5.In a particular embodiment, the mobile finger 8 has an obstacle 15 which is arranged between the first flange 6 and the second flange 7. The obstacle 15 is mobile between the two flanges 6 and 7. The first flange 6 defines a hole through and / or a recess 16 which cooperate with the obstacle 15. The recess 16 does not extend over the entire width of the first flange 6. The width is measured along the longitudinal axis of the cable 5 or the axis perpendicular to the two axes of rotation of the sheaves 2 and passing through the two axes of rotation. In the open position, the obstacle 15 partially sinks into the through hole and/or into the recess 16. The obstacle 15 is configured to at least partially obstruct the space between the two flanges 6 and 7 and prevent the cable 5 is located between finger 8 and first flange 6, which prevents cable 5 from being extracted.

L'obstacle 15 coopère avec les deux flasques 6 et 7 de sorte que la longueur d'obstruction de l'obstacle 15 dans le logement change selon que le doigt 8 soit dans la position fermée ou dans la position ouverte. La longueur est mesurée selon la direction qui traverse le premier flasque 6 et le deuxième flasque 7. La longueur d'obstruction est plus importante dans la position fermée que dans la position ouverte. Dans la position fermée, la longueur d'obstruction s'oppose au passage du câble entre le premier flasque 6 et l'obstacle 15. La distance entre l'obstacle 15 et le premier flasque 6 est inférieure au diamètre du câble 5. Dans la position ouverte, la distance entre l'obstacle 15 et le deuxième flasque 7 est supérieure au diamètre du câble 5.The obstacle 15 cooperates with the two flanges 6 and 7 so that the obstruction length of the obstacle 15 in the housing changes depending on whether the finger 8 is in the closed position or in the open position. The length is measured in the direction which crosses the first flange 6 and the second flange 7. The obstruction length is greater in the closed position than in the open position. In the closed position, the obstruction length opposes the passage of the cable between the first flange 6 and the obstacle 15. The distance between the obstacle 15 and the first flange 6 is less than the diameter of the cable 5. In the open position, the distance between the obstacle 15 and the second flange 7 is greater than the diameter of the cable 5.

Dans la position fermée, l'obstacle 15 s'étend d'une première distance depuis le premier flasque 6 vers le deuxième flasque 7. La première distance est inférieure ou égale à la distance minimale qui sépare les deux flasques 6 et 7 dans un plan parallèle au plan qui contient les deux axes de rotation des réas 2 et qui passe par l'obstacle 15. La différence entre la première distance et la distance minimale qui sépare les deux flasques 6 et 7 est inférieure au diamètre du câble 5, par exemple 12mm. Le câble 5 possède une tension ou une rigidité qui l'empêche de se déformer et passer entre l'obstacle 15 et le premier flasque 6. Le câble 5 reste entre l'obstacle 15 et les réas 2.In the closed position, the obstacle 15 extends a first distance from the first flange 6 towards the second flange 7. The first distance is less than or equal to the minimum distance which separates the two flanges 6 and 7 in a plane parallel to the plane which contains the two axes of rotation of the sheaves 2 and which passes through the obstacle 15. The difference between the first distance and the minimum distance which separates the two flanges 6 and 7 is less than the diameter of the cable 5, for example 12mm. The cable 5 has a tension or a rigidity which prevents it from deforming and passing between the obstacle 15 and the first flange 6. The cable 5 remains between the obstacle 15 and the sheaves 2.

Dans la position ouverte, l'obstacle 15 s'enfonce dans le renfoncement 16 et/ou dans le trou traversant de sorte que la distance qui sépare l'obstacle 15 et le deuxième flasque 7 est supérieure au diamètre du câble 5. Cela permet l'insertion ou l'extraction du câble 5.In the open position, the obstacle 15 sinks into the recess 16 and/or into the through hole so that the distance which separates the obstacle 15 and the second flange 7 is greater than the diameter of the cable 5. This allows the insertion or extraction of the cable 5.

L'obstacle 15 permet de limiter le déplacement du câble 5 et évite que le câble 5 se trouve coincé entre le doigt 8 et le premier flasque 6. Avec ce coincement, il n'est pas possible d'extraire le câble voire d'ouvrir le doigt 8.The obstacle 15 makes it possible to limit the movement of the cable 5 and prevents the cable 5 from being stuck between the finger 8 and the first flange 6. With this jamming, it is not possible to extract the cable or even to open finger 8.

La poulie double comporte un point de fixation 17 qui est destiné à connecter mécaniquement l'utilisateur avec la poulie. Le point de fixation 17 permet l'introduction d'une longe, d'une sangle, d'une corde ou d'un mousqueton.The double pulley has an attachment point 17 which is intended to mechanically connect the user with the pulley. The attachment point 17 allows the introduction of a lanyard, a strap, a rope or a carabiner.

Dans une configuration particulière, le doigt 8 comporte un crochet 18 qui coopère avec le deuxième flasque 7. De préférence, le crochet 18 coopère avec un trou traversant du deuxième flasque 7. Le trou traversant traverse la paroi interne et la paroi externe du deuxième flasque 7.In a particular configuration, the finger 8 comprises a hook 18 which cooperates with the second flange 7. Preferably, the hook 18 cooperates with a through hole of the second flange 7. The through hole passes through the internal wall and the external wall of the second flange 7.

Dans un mode de réalisation avantageux, le crochet 18 vient en appui contre la paroi latérale du deuxième flasque 7 lorsque l'effort appliqué sur le point de fixation 17 atteint une valeur seuil. L'effort seuil correspond avantageusement à un utilisateur suspendu au point de fixation 17. Dans une configuration particulière, la mise en appui du crochet 18 contre la paroi latérale du deuxième flasque 7, empêche l'ouverture de la fente.In an advantageous embodiment, the hook 18 bears against the side wall of the second flange 7 when the force applied to the attachment point 17 reaches a threshold value. The threshold force advantageously corresponds to a user suspended from the attachment point 17. In a particular configuration, the bearing of the hook 18 against the side wall of the second flange 7 prevents the opening of the slot.

De manière avantageuse, la poulie 1 possède un point de fixation 17 qui se situe sous le logement.Advantageously, the pulley 1 has a fixing point 17 which is located under the housing.

Dans le mode de réalisation illustré, le point de fixation 17 est formé par une tige 19 qui s'étend depuis le premier flasque 6. De manière avantageuse, la tige 19 s'étend jusqu'à un deuxième flasque additionnel 20 qui est fixé au premier flasque 6 par d'autres moyens. Les connexions entre la tige 19, le premier flasque 6 et deuxième flasque additionnel 20 permettent de transmettre une partie des efforts appliqués sur la tige 19 au premier flasque 6.In the illustrated embodiment, the attachment point 17 is formed by a rod 19 which extends from the first flange 6. Advantageously, the rod 19 extends to an additional second flange 20 which is fixed to the first flange 6 by other means. The connections between the rod 19, the first flange 6 and the second additional flange 20 make it possible to transmit part of the forces applied to the rod 19 to the first flange 6.

Dans une configuration particulière, le premier flasque 6 est connecté au deuxième flasque 7 au moyen d'un support 21. Le support 21 peut avoir une face supérieure qui définit une ou deux encoches 22 qui sont disposées aux extrémités de l'étrier de support selon l'axe longitudinal du câble 5. Chaque encoche 22 peut être configurée pour retenir un mousqueton. De manière avantageuse, l'encoche 22 est configurée pour définir une dépression qui se situe entre l'arbre de rotation 3 et l'extrémité du support. L'encoche 22 peut être formée par un élément 23 qui définit une corne.In a particular configuration, the first flange 6 is connected to the second flange 7 by means of a support 21. The support 21 can have an upper face which defines one or two notches 22 which are arranged at the ends of the support bracket along the longitudinal axis of the cable 5. Each notch 22 can be configured to hold a carabiner. Advantageously, the notch 22 is configured to define a depression which is located between the rotation shaft 3 and the end of the support. The notch 22 can be formed by an element 23 which defines a horn.

Dans une configuration particulière, l'arbre de rotation du doigt mobile 8 est monté sur un espaceur 24 qui est configuré pour décaler l'axe de rotation par rapport au premier flasque 6. L'espaceur 24 est monté entre le premier flasque 6 et le deuxième flasque additionnel 20.In a particular configuration, the rotation shaft of the movable finger 8 is mounted on a spacer 24 which is configured to offset the axis of rotation relative to the first flange 6. The spacer 24 is mounted between the first flange 6 and the second additional flange 20.

Dans une configuration spécifique, le bloqueur 9 vient en appui sur l'espaceur 24 qui est lui-même en appui sur le premier flasque 6.In a specific configuration, the blocker 9 bears against the spacer 24 which is itself bears against the first flange 6.

Claims (12)

  1. Tandem pulley (1) comprising:
    - a first flange (6) and a second flange (7) each having an inner surface and an outer surface,
    - a pair of sheaves (2) mounted in line between the first flange (6) and the second flange (7),
    - a gate (8) fitted movable in rotation with respect to the first flange (6) between a closed position and an open position, the gate (8) coming into contact with the second flange (7) in the closed position,
    - a housing designed to receive a cable (5), the housing being bounded by the first flange (6), the second flange (7), the pair of sheaves (2) and the gate (8), the gate (8) closing the housing in the closed position and defining a slot in the open position,
    - a clamp (9) fitted on the gate (8), the clamp (9) being fitted movable in rotation between a locking position locking the gate (8) in the closed position and an unlocking position allowing movement of the gate (8) between the closed position and the open position, the clamp (9) having a prong (12) pressing on the first flange (6) and on the gate (8) in the locking position,
    tandem pulley (1) characterised in that the clamp (9) defines an actuating area (10) separated from the first flange (6) by the gate (8), rotation of the actuating area (10) from the locking position to the unlocking position corresponding to movement of the actuating area (10) away from the second flange (7), said rotation of the actuating area (10) causing pivoting of the prong (12).
  2. Tandem pulley (1) according to claim 1, wherein the actuating area (10) and the prong (12) are separated by a rotation spindle (11) of the clamp (9) so that said rotation of the actuating area (10) makes the prong (12) move towards the sheaves (2).
  3. Tandem pulley (1) according to claim 2, wherein the actuating area (10) is a concave actuating area (10) having a pressing surface (14) extending from the rotation spindle (11) in a parallel direction to the axis of rotation of the sheaves (2) when the actuating area (10) is in the locking position.
  4. Tandem pulley (1) according to the foregoing claim, wherein the concave actuating area (10) has an abutment surface (13) extending from the rotation spindle (11) in the direction of the second flange (7) when the actuating area (10) is in the locking position.
  5. Tandem pulley (1) according to claim 4, wherein, when the clamp (9) is in the unlocking position and the gate (8) is in the open position, the abutment surface (13) and the second flange (7) define a slot opening into the housing designed to receive a cable (5), the abutment surface (13) separating the pressing surface (14) and the second flange (7), the slot being designed to allow the cable (5) to pass.
  6. Tandem pulley (1) according to claim 5, wherein, when the clamp (9) is in the unlocking position and the gate (8) is in the open position, the abutment surface (13) is separated from the second flange (7) by a distance smaller than the distance separating the first flange (6) from the second flange (7) in the housing.
  7. Tandem pulley (1) according to one of claims 3 to 6, wherein movement from the locking position to the unlocking position corresponds to a rotation of the actuating area (10) through an angle greater than or equal to 90°.
  8. Tandem pulley (1) according to the foregoing claim, wherein movement from the locking position to the unlocking position corresponds to a rotation of the actuating area (10) through an angle strictly greater than 95°.
  9. Tandem pulley (1) according to any one of the foregoing claims, wherein the clamp (9) does not present any area salient from the outer surface of the first flange (3).
  10. Tandem pulley (1) according to any one of the foregoing claims, wherein the gate (8) comprises an obstacle (15) salient from the inner surface of the second flange (7) and directed towards the first flange (6) when the prong is in the closed position, the distance between the obstacle (15) and the first flange (6) is smaller than 12mm and wherein the first flange (6) is provided with a through hole or a recess (16) arranged to allow the obstacle (15) to pass when the gate (8) is in the open position.
  11. Tandem pulley (1) according to any one of the foregoing claims, wherein the gate (8) defines a hook (18) pressing on an aperture of the second flange (7).
  12. Transportation device comprising a cable (5) and a tandem pulley according to one of the foregoing claims, the cable (5) being arranged in the housing.
EP20181528.9A 2019-07-08 2020-06-23 Pulley with secure opening Active EP3763425B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1907640A FR3098409B1 (en) 2019-07-08 2019-07-08 SECURE OPENING PULLEY

Publications (2)

Publication Number Publication Date
EP3763425A1 EP3763425A1 (en) 2021-01-13
EP3763425B1 true EP3763425B1 (en) 2022-03-23

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EP20181528.9A Active EP3763425B1 (en) 2019-07-08 2020-06-23 Pulley with secure opening

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US (1) US11560294B2 (en)
EP (1) EP3763425B1 (en)
CN (1) CN214138504U (en)
BR (1) BR102020008632A2 (en)
FR (1) FR3098409B1 (en)
TW (1) TW202116658A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD996193S1 (en) * 2021-05-19 2023-08-22 Zedel Pulley

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20071840A1 (en) * 2007-09-25 2009-03-26 Camp Spa PULLEY
TWI381795B (en) * 2008-10-08 2013-01-01 Compal Electronics Inc Latching structure of an mobile electronic device
CH704409B1 (en) * 2011-01-31 2015-09-15 Kanopeo Gmbh Pulley belay line system continues.
GB201401340D0 (en) * 2014-01-24 2014-03-12 Internat Safety Components Ltd Improvements in and relating to zipwire trolleys
US10544822B2 (en) * 2017-02-01 2020-01-28 TruBlue LLC Double-lock carabiner

Also Published As

Publication number Publication date
US11560294B2 (en) 2023-01-24
US20210009389A1 (en) 2021-01-14
RU2020122263A (en) 2022-01-10
CN214138504U (en) 2021-09-07
TW202116658A (en) 2021-05-01
FR3098409A1 (en) 2021-01-15
EP3763425A1 (en) 2021-01-13
BR102020008632A2 (en) 2021-08-17
FR3098409B1 (en) 2021-07-09

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