Tandem pulley and transport device

Abstract

pulley with secure opening. The present invention relates to a tandem pulley (1) comprising a pair of pulleys, mounted in line between the first and second flanges (6, 7). A gate (8) is adjusted by rotating relative to the first flange (6) between the closed and open positions. The gate (8) contacts the second flange (7) in the closed position to close a housing. The clamp (9) is movable in rotation on the gate (8), between a locking position locking the gate (8) in the closed position and an unlocking position. The clamp (9) has a claw pressing on the first flange (6), and the gate (8) in the locking position. The clamp (9) has an actuation area (10) separated from the first flange (6) by the gate (8). Rotation of the actuation area (10) from the locking position to the unlocking position corresponds to a movement of the actuation area (10) away from the second flange (7). Rotation of the actuation area (10) results in rotation of the gripper.

Description

1 / 15 Descriptive Report of the Invention Patent for "TANDEM PULLEY AND TRANSPORT DEVICE". BACKGROUND OF THE INVENTION

[0001] The present invention relates to a tandem pulley. Prior Art

[0002] In a large number of fields, it is known that to use a tandem pulley you have to run on a cable. For example, the tandem pulley is normally used when assembling zip lines, with a user sliding along the cable.

[0003] The tandem pulley has two pulleys mounted rotatably. The cable is mounted inside the pulley, in contact with the two pulleys. The tandem pulley has a connection point to make the mechanical connection between the user suspended from the pulley and the cable securing the pulley. The two pulleys are mounted in line, so that both pulleys run on the cable.

[0004] The pulley defines a housing for the cable, and a groove for inserting or extracting the cable. The cable can be inserted into the housing through the groove, so as to come into contact with the pulleys. After use, the cable is extracted from the housing through the groove.

[0005] It is known to have a door that can be opened, having a first position closing the slot, and a second position that allows the slot to open. The door that can be opened is rotatably mounted, and the user presses the door in such a way as to enable or prevent the cable from being inserted into or extracted from the housing.

[0006] In order to increase safety, it is also known to install a locking system, which keeps the door locked in position by closing the groove. The locking system is configured to prevent simple pressure on the door, which could be opened resulting in the groove opening. A locking system is used in the pulley marketed by International Safety Components Ltd., under the trademark Zip. Petition 870230035778, dated April 28, 2023, page 4 / 26 2 / 15 peyTM. The opening of the slot is not achieved by pressing the door that can be opened, but by pressing on a tip connected to the door that can be opened.

[0007] The door that can be opened is mounted by rotating on a rear flange, so as to make contact with the front flange, and the locking tip protrudes from the rear flange. To open the housing and insert the cable, the user presses the tip to move it out of the rollers, which causes the movable door to rotate.

[0008] From experience, it becomes evident that such a pulley is not satisfactory in use. When the tip protrudes beyond the rear flange, it is not immediately visible, so the user does not intuitively understand how to open the pulley. Furthermore, when the user slides along the cable and hooks to the pulley, their fingers catch the tip and tend to move the movable gate in the direction of opening the groove, which is not intended. The same is true for any item sliding along the rear flange, which may catch the locking tip comprising a hook. Objective of the invention

[0009] One object of the invention is to provide a tandem pulley, which has a locking mechanism, that is easier to use when seeking enhanced safety. For this purpose, the tandem pulley comprises: - a first flange and a second flange, each having an inner surface and an outer surface, - a pair of pulleys mounted in line, between the first flange and the second flange, - a movable, adjustable door rotating, relative to the first flange, between a closed and an open position, the door making contact with the second flange in the closed position, - a housing designed to receive a cable, the housing being Petition 870230035778, dated April 28, 2023, page 5 / 26 3 / 15 connected by the first flange, the second flange, the pair of pulleys and the door, the door closing the housing in the closed position, and defining a groove in the open position, - a clamp fitted to the door, the clamp being movable in rotation, between a locking position, locking the door in the closed position, and an unlocked position allowing movement of the door between the closed and open positions, the clamp having one end pressing on the first flange and on the door, in the locking position.

[0010] The tandem pulley is notable in that the clamp defines an actuation area, separated from the first flange by the port, rotation of the actuation area from the locking position to the unlocking position, corresponding to the movement of the actuation area away from the second flange, said rotation of the actuation area causing actuation of the tip.

[0011] In one development, the actuation area and the tip are separated by the rotating arm of the clamp, so that said rotation of the actuation area causes the tip to move in the direction of the pulleys.

[0012] Advantageously, the actuation area is a concave actuation area, which has a compression surface extending from the rotating rod, in a direction parallel to the rotation rod of the pulleys, when the actuation area is in the locking position.

[0013] Preferably, the concave actuation area has a bearing surface extending from the rotating rod towards the second flange when the actuation area is in the locking position.

[0014] In one development, when the clamp is in the unlock position and the door is in the open position, the surface of Petition 870230035778, dated April 28, 2023, page 6 / 26 4 / 15 The support surface and the second flange define a groove, opening into the housing designed to receive a cable, the support surface separating the pressure surface and the second flange, the groove being configured to allow the cable to pass through.

[0015] Advantageously, when the clamp is in the unlocked position and the door is in the open position, the bearing surface is separated from the second flange by a shorter distance than the distance separating the first flange and the second flange in the housing.

[0016] In a particular embodiment, the movement from the locking position to the unlocking position corresponds to a rotation of the actuation area through an angle greater than or equal to 90°.

[0017] In one configuration, the movement from the locking position to the unlocking position corresponds to a rotation of the actuation area through an angle strictly greater than 95°.

[0018] Preferably, the clamp does not have any area protruding from the outer surface of the first flange.

[0019] In another development, the gate comprises a protruding obstacle from the inner surface of the second flange, and directing towards the first flange, when the tip is in the closed position, the distance between the obstacle and the first flange is less than 12 mm, and the first flange is provided with a through hole, or a recess arranged to enable the obstacle to pass through, when the gate is in the open position.

[0020] Preferably, the door defines a hook by pressing into an opening on the second flange.

[0021] It is also an objective of the invention to provide a transport device, ensuring better safety than the configurations of the prior art, while remaining easy to use. Petition 870230035778, dated April 28, 2023, page 7 / 26 5 / 15

[0022] For this purpose, the transport device comprises a cable and a pulley in tandem, according to one of the preceding configurations, the cable being located in the housing. Brief description of the drawings

[0023] Other advantages and features will become more clearly apparent from the following description of particular embodiments and modes of implementation of the invention, due to the non-restrictive purposes of the example only, and represented in the accompanying drawings, in which: Figure 1 schematically illustrates a tandem pulley, with a gate in the closed position and the clamp in the locking position, a cable being fitted into the housing in contact with the pulleys; Figure 2 schematically represents a side view of a tandem pulley, with the gate in the closed position and the clamp in the locking position, a cable being fitted into the housing in contact with the pulleys; Figure 3 schematically represents a side view of a tandem pulley, with the gate in the closed position and the clamp in the unlocked position; Figure 4 schematically represents a side view of a tandem pulley, with the gate in the open position and the clamp in the unlocked position, the cable being inserted into the tandem pulley housing. Description of the modalities

[0024] As illustrated in figures 1 to 4, a tandem pulley device 1 comprises a pair of pulleys 2, which advantageously have identical structures. The pair of pulleys 2 is adjusted in line. Each pulley 2 is adjusted by rotating freely on a rod 3. The two rods 3 are fixed to a support strut 4. The support strut 4 is advantageously in the form of an inverted U. The support strut 4 Petition 870230035778, dated April 28, 2023, page 8 / 26 6 / 15 can be a metal support brace. Support brace 4 can be formed from a sheet of metal to define a U-shape, or substantially a U-shape. Support brace 4 can be formed by assembling several parts.

[0025] This device is designed to be part of a transport device, used for aerial transport of a person when performing a Tyrolean crossing on a rope or cable. The tandem pulley 1 runs along a fixed cable 5.

[0026] Support brace 4 has a first flange 6 and a second flange 7.

[0027] The two pulleys 2 are mounted rotating, by means of two rotating rods 3. The two rotating rods 3 are mounted parallel to each other. The two rotating rods 3 define two different axes of rotation. In the illustrated embodiment, the two axes of rotation 3 belong to the same plane, which divides each pulley 2 into two equal parts. Advantageously, the two pulleys 2 are mounted fixed to the support 4.

[0028] The two rotating rods 3 are fixed to the first and second flanges 6 and 7. The two pulleys 2 are fitted between the first and second flanges 6 and 7. The two pulleys 2 are oriented towards the inner surfaces of the two flanges 6 and 7.

[0029] The tandem pulley 1 comprises a gate 8, configured to be movable between a first position and a second position. The mobility of the gate 8 makes it possible for the insertion or extraction groove of the cable 5 to be defined. In the first position or closed position, the gate 8 closes the groove, and the cable 5 located in the housing cannot be extracted. In the second position or open position, the gate 8 defines a groove with the second flange 7, in order to allow the cable 5 to be inserted or extracted. The gate 8 is separated from the second flange 7 by a distance ensuring that the cable 5 is able to pass through. Petition 870230035778, dated April 28, 2023, page 9 / 26 7 / 15

[0030] The housing is partially defined by the first flange 6, the second flange 7, the door 8 and the two pulleys 2.

[0031] The gate 8 is fitted by rotating between the two positions, to define the groove or not. The gate 8 is fitted around the rotation rod, which is fixed to the first flange 6. The rotation rod defines a rotation axis of the gate 8, which is advantageously located parallel to an axis that passes through two rotation axes of the two pulleys 2, and which is perpendicular to the two rotation axes of the pulleys 2.

[0032] It is advantageous to use a spring, connected to the first flange 6 and to the gate 8. The spring is configured to move the movable gate 8 to the closed position, thereby closing the groove, if no mechanical pressure is applied. The spring applies a force to the gate 8 in order to drive the latter towards the second flange 7.

[0033] Door 8 is associated with a clamp 9, unlocking door 8 in the closed position, even if door 8 is subjected to mechanical pressure. Clamp 9 is fitted to door 8 so that it moves with the movements of door 8. Clamp 9 has an actuation area 10, which is fitted to door 8. The actuation area 10 is designed to cooperate with the user's finger.

[0034] Clamp 9 is movably fitted between a first position and a second position. The first position of clamp 9 is a locking position, keeping the movable door 8 in the closed position. The second position of clamp 9 is an unlocking position, allowing the door 8 to move between the closed and open positions. Clamp 9 is movably fitted in relation to the door 8 and in relation to the first flange 6.

[0035] Advantageously, the clamp 9 is fitted and able to rotate relative to the door 8. It is particularly advantageous to use a clamp 9, fitted, rotating around a rotating rod 11, Petition 870230035778, dated April 28, 2023, page 10 / 26 8 / 15 is fixed in place on the door 8. The actuation area 10 is rotatably arranged around the rotation rod 11. The axis of rotation of the clamp 9 is different from the axis of rotation of the door 8. For example, the rotation rod 11 of the clamp 9 defines an axis of rotation that is parallel to the axis of rotation of the movable door 8. The axis of rotation of the clamp 9 is located between the axis of rotation of the movable door 8 and the point of contact with the second flange 7.

[0036] In the locked position, the clamp 9 presses against the first flange 6, directly or indirectly, for example, by means of a claw 12. The bearing force opposes the movement of the gate 8 from the closed position to the open position. In another configuration, the clamp 9 presses against the gate 8 by means of the claw. In this locked position, the claw 12 opposes the rotation of the gate 8. The clamp 9 preferably has a rotatably mounted claw 12. Advantageously, in the locked position, the clamp 9 presses against the inner surface of the first flange 6, that is, the surface that faces the pulleys 2.

[0037] In the unlocked position, clamp 9 enables movement of door 8 towards the first flange 6, for example, by not simultaneously pressing on the first flange 6 and door 8.

[0038] When movement takes place from a locked position to an unlocked position, the actuation area 10 rotates, moving away from the pulleys 2 and the second flange 7. The movement of the actuation area 10 results in movement of the gripper 12, which advantageously moves towards the pulleys 2.

[0039] The actuation area 10 of the clamp 9 is visible on the front surface of the pulley, that is, the surface comprising the groove. The actuation area 10 protrudes from the front surface of the pulley 1, making it easier for the user to operate, as they can directly see the area to be used to open the pulley 1. This configuration makes possible Petition 870230035778, dated April 28, 2023, page 11 / 26 9 / 15 a clamp 9 should be considered as not protruding from the outer rear surface of the pulley, thus increasing safety during use.

[0040] In the illustrated configuration, the clamp 9 is formed in a single piece and is partially situated in the housing designed to receive the cable 5. The claw 12 is fitted, forming a single part with the actuation area 10. The claw 12 is fitted by rotating around the rotation rod 11. The rotation rod 11 separates the claw 12 and the actuation area 10. The rolling force of the claw 12 on the first flange 6 results in locking the door 8 when the rotation rod of the clamp 9 is fixed to the door 8.

[0041] Advantageously, the actuation area 10 is located at one end of the clamp 9, and the opposite end is formed by the claw 12, which presses against the first flange 6 when the clamp 9 is in the locking position.

[0042] In an alternative embodiment, which is not illustrated, the claw 12 is fitted by rotating with a rotation axis, which is different from that of the actuation area 10. The rotation of the claw 12 is caused by the rotation of the actuation area 10. The rotation rod of the claw 12 can be fitted into the first flange 6. This embodiment is less advantageous than the preceding embodiment, as it requires more component parts, thus increasing its size.

[0043] Preferably, the gripper 12 is in the form of two pieces, which are separated by the gate 8, along the axis of rotation of the clamp 9. The two protruding pieces ensure better transmission of forces, and can move in such a way as to be adjacent to the gate, in a direction parallel to the axis of rotation of the gate, as illustrated in figure 3.

[0044] The operating area 10 is advantageously concave to the operating area, and not convex to the operating area. The area of Petition 870230035778, dated April 28, 2023, page 12 / 26 10 / 15 action 10 defines a recess, which prompts the user to place a finger in the recess to move the clamp 9 and then the door 8.

[0045] The concave actuation area 10 has a bearing surface 13 and a pressure surface 14, which represent two distinct surfaces that meet to define the concavity. In the locking position, the bearing surface 13 covers the door 8, extending mainly from the rotation rod 11 to the second flange 7, i.e., towards the two pulleys 2. The bearing surface 13 extends substantially along the longitudinal axis of the door 8, to prevent any direct contact between the user's finger and the door 8 when the clamp 9 is in the locking position. The compression surface area 14 is arranged protruding from the door 8, extending orthogonally to the rotation axis of the clamp 9, and orthogonally to the longitudinal axis of the door 8. The compression surface 14 extends from the rotation rod 11, in a direction parallel to the rotation axis of the pulleys 2.The compression surface 14 is arranged protruding from the front surface of the pulley, thus making the clamp easier to operate. The compression surface 14 is a fixed area relative to the support surface 13. In the advantageous mode, the support surface 13 covers at least 50% of the distance separating the axis of rotation of the clamp 9 and the second flange 7 in the closed position, preferably at least 75%.

[0046] The support surface is optional when operating the clamp from the locking position. When the clamp 9 moves from the locking position to the unlocking position, the actuation area 10 moves away from the two pulleys 2 and away from the second flange 7. The pivots of the support surface 13 move away from the second flange 7. In this way, the user's finger, which moves the actuation area 10, is naturally at Petition 870230035778, dated April 28, 2023, page 13 / 26 11 / 15 a distance from the second flange 7, thus preventing obstruction of the groove, and facilitating the insertion or extraction of cable 5. The bearing surface 13 and the second flange 7 define a groove, which opens in the housing designed to receive a cable 5. The bearing surface 13 separates the compression surface 14 and the second flange 7. The groove is designed to allow cable 5 to pass through.

[0047] When clamp 9 is in the unlocked position and door 8 is in the open position, it is advantageous for the support surface 13 to be separated from the second flange 7 by a shorter distance than the distance separating the first flange 6 from the second flange 7 in the housing. The groove allows the cable to be inserted, while at the same time allowing a compact clamp to be formed.

[0048] The inventors observed that, with a pulley provided with a rotating gate 8, the user pushes the gate 8 to move it towards the first flange 6 and defines the groove. However, when the user performs this push to open pulley 1, his finger naturally slides towards the second flange due to the rotation, so that the user's finger moves inside the groove obstructing the latter. To eliminate or reduce this inconvenience, the height of the groove has to be increased, and / or the separation distance between the actuation area and the groove has to be increased. To circumvent this problem, the Zippey™ pulley presented previously uses an actuation area located on the rear surface of the pulley, which is less intuitive as far as its operation is concerned.

[0049] Conversely, by means of the concave actuation area 10, when the user presses the actuation area 10 to move the door 8, the support area 13 opposes sliding the user's finger. The pressure applied to the door 8, to make the door 8 rotate, is directed differently from the rotation of the actuation area 10. Petition 870230035778, dated April 28, 2023, page 14 / 26 12 / 15

[0050] The clamp 9 remains in the unlocked position, and the force applied by the user in the actuation area 10 moves the gate 8 towards the first flange 6 in order to define the groove. In an advantageous configuration, the groove is defined at one end by the distance between the second flange 7 and the support surface 13, and at the other end by the distance between the second flange 7 and the gate 8. The user's finger is protected from any contact with the cable 5 by the support surface 13.

[0051] In a preferred embodiment, clamp 9 defines an end-of-travel stop when movement takes place from the first position to the second position. Once the end-of-travel stop has been achieved, pressing the actuation area 10 results in a force being applied to the door 8, moving the door 8 from the closed position to the open position.

[0052] The actuation area 10 of the clamp 9 also forms the actuation area of ​​the door 8, so that the user's finger is able to move the clamp 9 from the locking position to the unlocking position, and the force applied in the unlocking position moves the door 8.

[0053] In the illustrated configuration, the actuation area 10 is separated from the first flange 6 by the port 8. The rotation rod 11 of the clamp 9 is adjusted between the rotation rod of the port 8 and the end of the port 8, which contacts the second flange 7 to close the groove.

[0054] Advantageously, the movement of the actuation area 10, from the locking position to the unlocking position, corresponds to rotation through an angle greater than or equal to 90°, and preferably greater than 95°. This rotation makes it possible to better differentiate between the movement causing the unlocking of the clamp 9, and the movement causing the opening of the groove. A downward vertical movement, applied to the pulley illustrated in Figure 1, thus results Petition 870230035778, dated April 28, 2023, pages 15 / 26 13 / 15 in the unlocking of clamp 9 without opening door 8. The same movement applied to the Zippey™ pulley results in the pulley opening. In the pulley illustrated in Figure 1, the downward vertical movement is then associated with a horizontal movement towards the first flange 6 in order to open the groove. Safety is increased by means of two consecutive forces, in two different directions, to achieve the pulley opening.

[0055] In a particular embodiment, the movable gate 8 has an obstacle 15 that is disposed between the first flange 6 and the second flange 7. The obstacle 15 is movable between the two flanges 6 and 7. The first flange 6 defines a through hole and / or a recess 16, colliding 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 pulleys 2, passing through the two axes of rotation. In the open position, the obstacle 15 sinks partially into and through the hole and / or recess 16. The obstacle 15 is configured to, at least partially, obstruct the space between the two flanges 6 and 7, and to prevent the cable 5 from itself being placed between the gate 8 and the first flange 6, thus preventing the cable 5 from being extracted.

[0056] Obstruction 15 works with the two flanges 6 and 7 in such a way that the length of the obstruction of obstruction 15 in the housing changes depending on whether the door 8 is in the closed or open position. The length is measured in the direction in which it passes through the first flange 6 and the second flange 7. The length of the obstruction is greater in the closed position than in the open position. In the closed position, the length of the obstruction prevents the cable from passing between the first flange 6 and obstruction 15. The distance between obstruction 15 and the first flange 6 is less than the diameter of the cable 5. In the open position, the distance between obstruction 15 and the second flange 6 is less than the diameter of the cable 5. Petition 870230035778, dated April 28, 2023, page 16 / 26 14 / 15 flange 7 is larger than cable diameter 5.

[0057] In the closed position, the obstacle 15 extends over a first distance, from the first flange 6 to the second flange 7. The first distance is less than or equal to the minimum distance separating the two flanges 6 and 7, in a plane parallel to the plane containing the two axes of rotation of the pulleys 2, passing through the obstacle 15. The difference between the first distance and the minimum distance separating the two flanges 6 and 7 is less than the diameter of the cable 5, for example 12 mm. The cable 5 has a tension or stiffness, preventing it from deforming and passing between the obstacle 15 and the first flange 6. The cable 5 remains between the obstacle 15 and the pulleys 2.

[0058] In the open position, the obstacle 15 sinks into the recess 16 and / or the entire orifice, so that the distance separating the obstacle 15 and the second flange 7 is greater than the diameter of the cable 5. This allows the cable 5 to be inserted and extracted.

[0059] Obstacle 15 allows the movement of cable 5 to be limited, and prevents cable 5 from getting stuck between door 8 and the first flange 6. If this sticking occurs, it is not possible to extract the cable or even open door 8.

[0060] The tandem pulley comprises a coupling point 17, designed to mechanically connect the user to the pulley. The coupling point 17 allows a cord, strap, rope or carabiner to be inserted.

[0061] In a particular configuration, the port 8 comprises a hook 18, collaborating with the second flange 7. The hook 18 preferably collaborates with a through hole of the second flange 7. The through hole passes through the inner wall and the outer wall of the second flange 7.

[0062] In an advantageous embodiment, hook 18 presses against the side wall of the second flange 7, when the force applied to Petition 870230035778, dated April 28, 2023, pages 17-26 15 / 15 coupling point 17 reaches a limit value. The limit force advantageously corresponds to a user suspended at coupling point 17. In a particular configuration, the pressing of the hook 18 against the side wall of the second flange 7 prevents the groove from opening.

[0063] Advantageously, pulley 1 has a coupling point 17, located under the housing.

[0064] In the illustrated embodiment, a coupling point 17 is formed by a pin 19 extending from the first flange 6. In the advantageous embodiment, the pin 19 extends to a second additional flange 20, which is fixed to the first flange 6 by other means. The connections between the pin 19, the first flange 6 and the second additional flange 20 allow a portion of the forces applied to the pin 19 to be transmitted to the first flange 6.

[0065] In a particular configuration, the first flange 6 is connected to the second flange 7 by means of a support 21. The support 21 may have a top surface defining one or two notches 22, arranged at the ends of the support bracket, in the longitudinal direction of the cable 5. Each notch 22 may be configured to attach a carabiner. In the advantageous manner, the notch 22 is configured to define a recess, located between the rotation rod 3 and the end of the support. The notch 22 may be formed by a part 23 defining a point (sharp end).

[0066] In a particular configuration, the rotating rod of the movable door 8 is fitted in a spacer 24, configured to change the axis of rotation relative to the first flange 6. The spacer 24 is fitted between the first flange 6 and the second additional flange 20.

[0067] In a specific configuration, clamp 9 presses against spacer 24, which is itself pressed against the first flange 6. Petition 870230035778, dated April 28, 2023, pp. 18-26

Claims

1 / 3 CLAIMS 1. Tandem pulley (1), comprising: - a first flange (6) and a second flange (7), each having an inner and an outer surface, - a pair of pulleys (2) mounted in line between the first flange (6) and the second flange (7), - a gate (8) movably adjusted in rotation, relative to the first flange (6), between a closed position and an open position, the gate (8) contacting the second flange (7) in the closed position, - a housing designed to receive a cable (5), the housing being fastened by the first flange (6), the second flange (7), the pair of pulleys (2) and the gate (8), the gate (8) closing the housing in the closed position and defining a groove in the open position, - a clamp (9) rotatably mounted around a rotating rod (11) fixed to the gate (8), the clamp (9) being movably adjusted in rotation between the locking position locking the gate (8) in the position closed,and an unlocking position enabling the movement of the door (8) between the closed and open positions, the clamp (9) having a claw (12) pressing on the first flange (6) and on the door (8) in the locking position, the tandem pulley (1), characterized in that the clamp (9) defines an actuation area (10), separated from the first flange (6) by the door (8), the rotation of the actuation area (10) from the locking position to the unlocking position, corresponding to the movement of the actuation area (10) outwards from the second flange (7), said rotation of the actuation area (10) causing the articulation of the claw (12).

2. Tandem pulley (1) according to claim 1, characterized in that the actuation area (10) and the gripper (12) are separated by a rotating rod (11) from the clamp (9), of Petition 870230035778, of 04 / 28 / 2023, page 19 / 26 2 / 3 in such a way that said rotation of the actuation area (10) causes the gripper (12) to move away from or towards the pulleys (2).

3. Tandem pulley (1) according to claim 2, characterized in that the actuation area (10) is a concave actuation area (10), which has a compression surface (14) extending from the rotation rod (11), in a direction parallel to the axis of rotation of the pulleys (2), when the actuation area (10) is in the locking position.

4. Tandem pulley (1) according to the preceding claim, characterized in that the concave actuation area (10) has a support surface (13), extending from the rotation rod (11), in the direction of the second flange (7), when the actuation area (10) is in the locking position.

5. Tandem pulley (1) according to claim 4, characterized in that, when the clamp (9) is in the unlocked position and the door (8) is in the open position, the support surface (13) and the second flange (7) define a groove opening in the housing designed to receive a cable (5), the support surface (13) separating the compression surface (14) and the second flange (7), the groove being designed to allow the cable (5) to pass through.

6. Tandem pulley (1) according to claim 5, characterized in that, when the clamp (9) is in the unlocked position and the door (8) is in the open position, the bearing 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 any one of claims 3 to 6, characterized in that the movement from the locked position to the unlocked position corresponds to Petition 870230035778, dated 28 / 04 / 2023, page 20 / 26 3 / 3 a rotation of the actuation area (10), through an angle greater than or equal to 90°.

8. Tandem pulley (1) according to the preceding claim, characterized in that the movement from the locked position to the unlocked position corresponds to a rotation of the actuation area (10) through an angle strictly greater than 95°.

9. Tandem pulley (1) according to any of the preceding claims, characterized in that the clamp (9) does not present any salient area of ​​the outer surface of the first flange (3) when observed in a direction corresponding to an axis perpendicular to the axis of rotation of the pulleys.

10. Tandem pulley (1) according to any of the preceding claims, characterized in that the gate (8) comprises a protruding obstacle (15) from the inner surface of the second flange (7), and directed towards the first flange (6), when the gripper is in the closed position, the distance between the obstacle (15) and the first flange (6) being less than 12 mm, and the first flange (6) is provided with a through hole or recess (16), arranged to enable the obstacle (15) to pass through when the gate (8) is in the open position.

11. Tandem pulley (1) according to any of the preceding claims, characterized in that the gate (8) defines a hook (18) pressing into an opening of the second flange (7).

12. Transport device, characterized in that it comprises a cable (5) and a tandem pulley, as defined in any of the preceding claims, the cable (5) being disposed in the housing. Petition 870230035778, dated 28 / 04 / 2023, pp. 21 / 26

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