EP4273085A1 - Doppelblasheber mit verbessertem verriegelungsmechanismus - Google Patents

Doppelblasheber mit verbessertem verriegelungsmechanismus Download PDF

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Publication number
EP4273085A1
EP4273085A1 EP23170289.5A EP23170289A EP4273085A1 EP 4273085 A1 EP4273085 A1 EP 4273085A1 EP 23170289 A EP23170289 A EP 23170289A EP 4273085 A1 EP4273085 A1 EP 4273085A1
Authority
EP
European Patent Office
Prior art keywords
latch
stop
thrust
locking
locking member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23170289.5A
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English (en)
French (fr)
Inventor
Jonathan CHALAVON
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manitowoc Crane Group France SAS
Original Assignee
Manitowoc Crane Group France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Manitowoc Crane Group France SAS filed Critical Manitowoc Crane Group France SAS
Publication of EP4273085A1 publication Critical patent/EP4273085A1/de
Pending legal-status Critical Current

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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
    • 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
    • B66D3/043—Block and tackle system with variable number of cable parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C11/00—Trolleys or crabs, e.g. operating above runways
    • B66C11/16—Rope, cable, or chain drives for trolleys; Combinations of such drives with hoisting gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/46—Position indicators for suspended loads or for crane elements

Definitions

  • the invention relates to a double reeving lifting device for a lifting machine, as well as an associated lifting machine and a lifting method.
  • the invention finds a preferred, and non-limiting, application for a lifting machine such as a crane, and in particular a tower crane.
  • a double reeving lifting device is reversibly configurable between two reeving configurations including a single reeving configuration with two lifting strands and a double reeving configuration with four lifting strands, where the double reeving lifting device comprises a system reeving change allowing you to make a reeving change between the single reeving configuration and the double reeving configuration.
  • the lower block is suspended on the lifting gear by a lifting cable connected to a lifting winch to raise/lower the lower block, and this lifting cable passes through the upper block, so that the connected configuration and the disconnected configuration correspond respectively to a double reeving configuration and to a single reeving configuration, or vice versa, of the double reeving lifting device, depending on the passage of the lifting cable at the level of the upper block.
  • documents FR 1 520 612 , FR 2 137 333 , FR 2 368 431 , FR 2 131 924 , FR 2 228 024 describe double-reeving lifting devices in which the connected configuration corresponds to the double-reeving configuration, and the disconnected configuration corresponds to the single-reeving configuration; the lifting cable passing below a pulley carried by the upper block.
  • the documents UK 2,176,456 , FR 2 333 743 , DE 3149 690 , FROM 35 43 214 describe double-reeving lifting devices in which the connected configuration corresponds to the single-reeving configuration, and the disconnected configuration corresponds to the double-reeving configuration; the lifting cable passing above a pulley carried by the upper block.
  • the present invention aims to resolve at least in part the aforementioned drawbacks, by proposing a double-reeving lifting device equipped with robust reversible connection means because it is composed of a minimum of parts.
  • Another aim of the invention is to propose reversible connection means equipped with a locking mechanism which makes the two connected and disconnected configurations more reliable, in order to avoid any risk of unwanted disconnection and therefore of the lower muffle falling.
  • the invention proposes a reversible connection system which is designed to convert raising/lowering movements of the lower muffle (vertical translation movements) into sliding movements of the locking member in the locking channel so that it engages with the free end of the latch (connected configuration) or it releases from this free end (disconnected configuration), which will allow the two muffles to be connected/disconnected easily, in a secure and reliable manner .
  • the thrust stop and the elastic return member form an elastic thrust device which is particularly advantageous, because it allows you to push on the latch (instead of pulling on it) so that it engages reliably. and stable with the locking member in the free end of the latch, to avoid an unstable grip likely to cause a disconnection between the two mittens.
  • the connected configuration and the disconnected configuration correspond respectively to a double reeving configuration and a single reeving configuration, or vice versa, of the double reeving lifting device.
  • the thrust stop is mounted sliding in translation on the chassis, to exert a linear thrust on the latch which pivots under the effect of such a thrust.
  • the double reeving lifting device comprises a display means configured to visualize whether the thrust stop is in its maximum advanced position which is associated with the disconnected configuration or in one of its recoil positions, called connection back position, which is associated with the connected configuration.
  • connection phase transition from the disconnected configuration to the connected configuration
  • disconnection phase transition from the connected configuration to the disconnected configuration
  • the display means is configured to visualize whether the thrust stop is in another of the recoil positions, called unstable recoil position, which is associated with an unstable configuration in which the thrust stop has retreated beyond the connection recoil position.
  • the display means makes it possible to visualize whether the muffles are in the unstable configuration, thus making it possible to stop or resume the connection or disconnection phase, and thus avoid an error which could have dramatic consequences, such as an unexpected disconnection of the lower block could lead to a fall of the lower block and any load suspended from it.
  • the display means comprises a window provided in the chassis to display a mark provided on the thrust stop when in the maximum advanced position or in the connection retraction position.
  • the window allows you to see from the outside what position the thrust stop is in, thus making it possible to visually and directly appreciate what configuration the two muffles are in.
  • Such a solution is particularly interesting because it is economical, and in particular suitable for a tower crane where the pilot, located in the cockpit at the top of the mast and at the base of the jib, is quite close to the two blocks when they are brought back. at the bottom of the arrow to carry out a connection or disconnection phase.
  • the display means comprises, on the chassis, at least one visual reference which is in visual correspondence with the mark of the thrust stop when the thrust stop is in its maximum advanced position or in its backward position connection.
  • the at least one visual reference comprises a visual connection reference which is in visual correspondence with the mark of the thrust stop when the thrust stop is in its maximum advanced position, and a visual disconnection reference which is in visual correspondence with the thrust stop mark when the thrust stop is in its connection recoil position.
  • the at least one visual reference comprises a visual error reference which is in visual correspondence with the mark of the thrust stop when the thrust stop is in its unstable recoil position.
  • the thrust stop has a free rear end, opposite the free front end, and the mark is provided on said free rear end which faces the window.
  • the thrust stop passes through a fixed support secured to the chassis so that the free front end and the free rear end are arranged on either side of the fixed support.
  • the elastic return member is inserted between the fixed support and the free front end.
  • the display means comprises at least one position sensor configured to detect the thrust stop at least in its maximum advanced position and in its connection retraction position, and a display means connected to the sensor to display the position of the thrust stop based on detection by the position sensor.
  • the at least one position sensor can be a contact sensor (which therefore comes into contact with the thrust stop depending on its position in particular), or a contactless sensor such as for example an inductive sensor, a resistive sensor or a sensor light (such as a camera or an infrared sensor).
  • a contact sensor which therefore comes into contact with the thrust stop depending on its position in particular
  • a contactless sensor such as for example an inductive sensor, a resistive sensor or a sensor light (such as a camera or an infrared sensor).
  • the at least one latch comprises a single latch.
  • the double reeving lifting device comprises a removable stop which is movable on the frame in a blocking position in which said removable stop blocks the pivoting latch when it is engaged with the locking member in the connected configuration.
  • Such a removable stop thus makes it possible, when positioned in its locking position, to manually secure the locking of the connected configuration, for example during specific uses such as during transport on the road, or during use blind, for example for the assembly of an elevator shaft on the crane mast.
  • the removable stop is also movable on the chassis in a storage position in which said removable stop is distant from the latch so as not to interact with the latch.
  • the removable stop when not used in the locking position, remains accessible because it is mounted on the frame, without obstructing the latch, and can be easily reached to be positioned when necessary in the locking position.
  • the double reeving lifting device comprises a lower stop disposed in a bottom of the locking channel, opposite the mouth, and against which the locking member can come to bear, said lower stop being mounted movable on the chassis between a raised position in the absence of thrust exerted by the locking member on said lower stop, and lowered positions in the presence of a thrust force exerted by the locking member on said lower stop; and - a lower elastic return member urging said lower stop towards its raised position and offering a force resistant to a pushing force exerted by the locking member on said lower stop.
  • Such a lower stop/elastic return member assembly is particularly advantageous for reducing the influence of the dynamics of the lifting cable slack, and making the relative movements between the lower block and the upper block more reliable, in particular when the locking member is located at the bottom of the locking channel.
  • the lower stop is mounted sliding in translation on the chassis along the main axis.
  • the double reeving lifting device comprises a lower display means configured to visualize whether the lower stop is in its raised position which is associated with the connected configuration or in one of its lowered positions called unstable lowered position , which is associated with an unstable configuration in which the locking member is stuck under the latch.
  • Such a lower means of visualization thus makes it possible to detect a risk of poor connection between the latch and the locking member, where the locking member would be stuck under the latch, in particular stuck by a point of a distal edge of the latch .
  • the invention also relates to a lifting machine, such as for example a crane, comprising a boom and a double-reeving lifting device designed to lift/lower a load along the boom, this double-reeving lifting device being according to the invention, in which the lower block is suspended on the boom by a lifting cable connected to a lifting winch to raise/lower the lower block, this lifting cable passing through the upper block.
  • a lifting machine such as for example a crane
  • a lifting machine such as for example a crane
  • this double-reeving lifting device being according to the invention, in which the lower block is suspended on the boom by a lifting cable connected to a lifting winch to raise/lower the lower block, this lifting cable passing through the upper block.
  • a double reeving lifting device 1 for a lifting machine, such as for example a crane, which has a boom (not shown) and a distributor trolley 9 mounted movably on the boom and connected to a system distribution capable of moving the distributor carriage 9 along the arrow in an opposite front direction and a rear direction; this distribution system being for example a distribution winch which cooperates with a distribution cable for the movement of the distributor trolley 9.
  • a lifting machine such as for example a crane, which has a boom (not shown) and a distributor trolley 9 mounted movably on the boom and connected to a system distribution capable of moving the distributor carriage 9 along the arrow in an opposite front direction and a rear direction; this distribution system being for example a distribution winch which cooperates with a distribution cable for the movement of the distributor trolley 9.
  • the lower block 3 supports lower cable return means, such as for example two pulleys 31, for the passage of the lifting cable 90
  • the upper block 4 supports upper cable return means, such as by a pulley 41 , for the passage of the lifting cable 90.
  • the double reeving lifting device 1 is designed to raise/lower a load along the boom of the lifting machine.
  • the connected configuration and the disconnected configuration correspond respectively to a double reeving configuration and a single reeving configuration, or vice versa, of the double reeving lifting device 1; the single reeving configuration being associated with support of the hook 30 (and therefore the load) by two lifting strands of the lifting cable, and the double reeving configuration being associated with support of the hook 30 (and therefore the load) by four lifting strands of the lifting cable.
  • the connected configuration corresponds to the double reeving configuration (with four strands), so that the disconnected configuration corresponds to the single reeving configuration (with two strands).
  • the reversible mechanical connection system comprises a locking mechanism 5 mounted on the lower muffle 3, and a complementary locking structure 6 mounted on the upper muffle 4 and capable of cooperating with the locking mechanism 5.
  • the upper muffle 4 supports in the upper part, opposite the entrance 63 of the complementary locking structure 6, an upper stop 43 formed for example of two sides which meet in the shape of a wedge. This upper stop 43 makes it possible to avoid unlocking against an obstacle during an upward lifting movement.
  • the flanges 61 move away from each other at the level of the inlet 63, so that this inlet 63 is flared.
  • the locking mechanism 5 is integrated into the lower block 3 and it is provided above the lower cable return means, therefore above the two pulleys 31 in the example illustrated.
  • the frame 50 has a locking channel 53 of elongated shape along the main axis (therefore in a vertical direction), where this locking channel 53 is formed by two notches made opposite in the two plates 51 and opening out on upper edges 510 of the plates 51, so that this locking channel 53 is provided with a mouth 54 through which the locking member 62 of the complementary locking structure 6 can enter and exit the locking channel 53.
  • the mouth 54 is flared to facilitate and center the insertion of the locking member 62 inside the locking channel 53.
  • the locking member 62 has a cross section dimensioned to be able to slide in the locking channel 53.
  • the internal distance between the two flanges 61 of the frame 60 is greater than the thickness of the frame 50, so that the frame 50 can enter inside the groove of the frame 60 (therefore between the two flanges 61) via the inlet 63, which is advantageously flared to facilitate this passage.
  • the locking member 62 can slide in the locking channel 53 in an entry direction (downwards) and in an exit direction (upwards), opposite to the entry direction, during respectively a ruzement and a relative distance between the two blocks 3, 4. It is advantageous for the locking member 62 to slide in an adjusted manner (with reduced clearance) inside the locking channel 53.
  • This locking member 62 is advantageously of section cylindrical according to a given diameter.
  • the locking channel 53 has a width substantially equivalent to the diameter of the locking member 62.
  • the locking channel 53 has a bottom 55, which is located between the two pulleys 31, where this bottom 55 is opposite the mouth 54 and is capable of stopping sliding of the locking member 62 in the direction of entry . It should be noted that the two pulleys 31 are also rotatably mounted between the two plates 51.
  • the latch 52 is unique, it is arranged on one side of the locking channel 53, and it is pivotally mounted on the chassis 50, between the two plates 51, along a pivot axis orthogonal to the main axis and also parallel to the longitudinal axis of the locking member 62.
  • the latch 52 thus pivots in a plane including the main axis, and which is orthogonal to the pivot axis.
  • the latch 52 is provided with a free end 56 of concave shape suitable for engaging with the locking member 62, where the free end 56 has a notch 57 of complementary shape to the locking member 62.
  • the The notch 57 of the free end 56 of the latch 52 has a bearing area in the form of an arc of a circle with a diameter equivalent to the diameter of the locking member 62.
  • the latch 52 is arranged between the mouth 54 and the bottom 55 of the channel locking 53.
  • the notch 57 of the free end 56 is delimited by two opposite edges 571, 572 on which the locking member 62 can exert a thrust, namely a proximal edge 571, facing the mouth 54 of the locking channel 53 , and a distal rim 572 facing the bottom 55 of the locking channel 53. Furthermore, the proximal rim 571 and the distal rim 572 respectively have a proximal length and a distal length measured radially from the pivot axis, and the proximal length is less than the distal length.
  • proximal rim 571 ends with a proximal tip 573 forming a free end
  • distal rim 572 ends with a distal tip 574 forming a free end; these two points 573, 574 forming the ends of the notch 57.
  • the thrust device 7 extends between the two plates 51 and it comprises a thrust stop 70 provided with a free front end 71 capable of abutting against the latch 52, and more specifically against a support surface provided for proximity to the pivot axis.
  • This thrust stop 70 also has a free rear end 72, opposite the free front end 71.
  • the thrust stop 70 is in the form of an elongated part along an axis of extension orthogonal to the main axis.
  • the thrust stop 70 passes through and slides in a fixed support 73 secured to the chassis 50, so that the free front end 71 and the free rear end 72 are arranged on either side of the fixed support 73.
  • the pushing device 7 further comprises an elastic return member 74, for example in the form of a helical spring, this elastic return member 74 urging the thrust stop 70 towards its maximum advanced position and offering a resistant force to a thrust force exerted by the latch 52 on its free front end 71.
  • the elastic return member 74 is at rest in the maximum advanced position of the thrust stop 70.
  • this elastic return member 74 is interposed between the fixed support 73 and the free front end 71, and more precisely a stopping surface provided on the free front end 71.
  • the double-reeving lifting device 1 may also include a proximal stop 79, made of an elastomeric material (for example rubber, silicone or other elastic material), and fixedly mounted on the chassis 50, between the two plates 51, at the level of the upper edges 510 of the plates 51 and above the latch 52.
  • This proximal stop 79 promotes the elastic return to the neutral position of the latch 52 when the latter is brought into the proximal position.
  • This display means 8 comprises at least one window 80 provided in the frame 5, and more precisely in one of the two plates 51, or possibly two windows 80 which face each other and which are provided in the two respective plates 51.
  • the or each window 80 is located opposite the thrust stop 70 in order to be able to view from the outside a portion of the thrust stop 70, and thus see its movement. More precisely, the or each window 80 is located opposite the free rear end 72, and has an oblong or elongated shape parallel to the axis of extension of the thrust stop 70.
  • the or each window 80 has two opposite edges , namely a front edge 81 (closer to the latch 52) and a rear edge 82 (further from the latch 52).
  • connection marking 84 located substantially in the middle of the window 80, but this time in the form of a number "4" corresponding to the number of lifting strands in the double configuration reeving (four strands).
  • the visual disconnection reference is this time in the form of a disconnection marking 85 on the chassis 50 (and more specifically on one of the two plates 51), this disconnection marking 85 being located at the front edge 81 of window 80, in the form of a number “2” corresponding to the number of lifting strands in the single reeving configuration (with two strands).
  • the display means 8 is also configured to visualize whether the thrust stop 70 is in another of the recoil positions, namely the first unstable recoil position, which is associated with a first unstable configuration in which the latch 62 is in the first unstable position described previously and visible on the Figure 8 .
  • This first backward position unstable of the thrust stop 70 is, as a reminder, positioned between its so-called connection recoil position and its maximum recoil position.
  • a visual error reference is provided which is in visual correspondence with the mark 83 when the thrust stop 70 is in its first unstable recoil position, which will make it possible to visually indicate to an operator the presence of a defect.
  • the visual error reference corresponds to the rear edge 82 of the window 80, and which is in visual correspondence with the mark 83 when the thrust stop 70 is in its unstable recoil position (associated with the unstable configuration), because in this first unstable recoil position, mark 83, is located at this rear edge 82.
  • the visual error reference is in the form of an error marking 86 located at the rear edge 82, for example in the form of a cross "X".
  • a removable stop 20 which is in the form of a physical axis or a rod, which can be mounted in two places 21, 22 on the chassis 50, each place being formed of two holes opposite each other in the respective plates 51.
  • the first place 21 is located just below the latch 52 when the latter is in its locking position (visible on the Figure 21 ).
  • the removable stop 20 is then in a blocking position in which this removable stop 20 blocks the latch 52 from pivoting in the direction of distal rotation (pivoting downward) when engaged with the locking member 62 in the connected configuration; the latch 52 also cannot pivot in the direction of proximal rotation (pivoting upwards) because of the locking member 62.
  • this removable stop 20 makes it possible to lock the connected configuration.
  • the second location 22 is located at a distance from the latch 52, for example on the other side facing the locking channel 53, so as not to interfere with the latch 52.
  • This removable stop 20 can also cooperate with a lock 23, such as for example a bolt, a circlip or a retaining pin, in order to prevent it from falling when in the first place 21 or in the second place 22.
  • a lock 23 such as for example a bolt, a circlip or a retaining pin
  • This lower thrust device 10 further comprises a lower elastic return member 12 urging the lower stop 11 towards its raised position and offering a force resistant to a thrust force exerted by the locking member 62 on the lower stop 11.
  • the locking member 62 will come into contact with the lower stop 11 only during the disconnection phase, during the steps of the Figures 12 to 14 , and this lower stop 11 is advantageous for reducing the influence of the dynamics of the lifting cable slack, and making the movements of the lower block 3 more reliable during this disconnection phase.
  • a lower display means configured to visualize whether the lower stop 11 is in its raised position which is associated with the connected configuration or in one of its lowered positions called position unstable descent, which is associated with a second unstable configuration in which the latch 62 is in the second unstable position described above, in which as a reminder the locking member 62 is stuck under the latch 52 resting on the distal tip 574.
  • this visual reference of instability 13 is in the form of a low orifice associated with a symbol in the shape of a cross “X”, the mark placed in front of this orifice when the lower stop 11 is in its unstable lowered position.
  • a visual rest reference 14 can also be provided, which is in the form of a high orifice (above the low orifice) associated with a “V” shaped symbol, the mark being placed in front of this top orifice when the lower stop 11 is in its raised position.
  • connection phase for the transition from the disconnected configuration to the connected configuration, with reference to the Figures 5 to 10 .
  • the upper muffle 4 in the disconnected configuration, the upper muffle 4 is suspended above the lower muffle 3 and the latch 52 is in the neutral position, with the thrust stop 70 in the maximum advanced position.
  • the lower muffle 3 begins by being raised, as shown schematically by the arrow MO, for a relative ruzement between the two muffles 3, 4, until, with reference to the Figure 6 , the locking member 62 enters the locking channel 53 through the mouth 54 and comes into contact with the proximal rim 571 of the latch 52, thus bringing the upper block 4 into high abutment on the arrow, and more specifically up to that the upper stop 43 of the upper muffle 4 abuts against the distributor carriage 9.
  • the locking member 62 exerts a thrust on the proximal edge 571 of the latch 52, while sliding inside the locking channel 53 in the direction of entry (towards the bottom), to bring the latch 52 into the distal position in which the locking member 62 rests on the proximal tip 573 (see Figure 7 ), then the locking member 62 exceeds the proximal tip 573 of the latch 52 (see Figure 8 ), and then the latch 52 leaves contact with the proximal tip 573 (see Figure 9 ) and pivots in the direction of proximal rotation (upwards) under the effect of a thrust exerted by the thrust device 7, until the distal rim 572 of the latch 52 in turn comes into contact with the locking member 62, as shown schematically in Figure 9 .
  • the locking member 62 is engaged inside the free end 56 of the latch 52.
  • the lower muffle 3 is then moved downwards, as shown schematically by the arrow DE, so that the locking member 62 slides inside the locking channel 53 in the exit direction (upwards), and brings the latch 52 in the locking position, until the locking member 62 is stuck inside the free end 56 of the latch 52 and is therefore blocked from sliding in the locking channel 53 in the exit direction , and thus the lower muffle 3 and the upper muffle 4 are connected.
  • the thrust stop 70 is in the connection recoil position, and the mark 83 is in correspondence with the visual connection reference 84, which allows the operator to visualize the connection and thus continue the descent of the lower muffle 3 with the upper muffle 4 in connected configuration. It is also possible, if this option is present, to use the removable stop 20 to lock the connected configuration.
  • the latch 52 in the connected configuration, the latch 52 is in the locking position and the locking member 62 is stuck inside the free end 56 of the latch 52, more precisely with the locking member 62 stuck inside of the notch 57 of this free end 56.
  • the thrust stop 70 is then in its connection recoil position, and the mark 83 is in correspondence with the visual connection reference 84.
  • the lower muffle 3 can be lowered together with the upper muffle 4. Indeed, when the lower muffle 3 descends with its latch 52, this latch 52 is blocked by the locking member 62 and cannot pivot towards the proximal position according to the direction of proximal rotation (pivoting upwards). Thus, the latch 52 remains blocked in the locking position with the locking member 62 which, as a reminder, is integral with the upper muffle 4. The upper muffle 4 is therefore connected to the lower muffle 3 and therefore descends with it .
  • the lower muffle 3 is first mounted (with the upper muffle 4), as shown schematically by the arrow MO, until the upper muffle 4 is at the top stop on the arrow, and more specifically until that the upper stop 43 of the upper muffle 4 abuts against the distributor carriage 9.
  • the latch 52 pivots downwards, while the locking member 62 slides towards the bottom 55, until the locking member 62 leaves the interior of the free end 56 of the latch 52, exceeds the tip distal 574 and ends up leaving contact with the latch 52, and then, as illustrated in Figure 14 , the latch 52 returns to the neutral position under the effect of the thrust exerted by the thrust device 7, and the locking member 62 is under the latch 52 (or even is arranged in the bottom 55 of the locking channel 53) .
  • the thrust stop 70 moves back under the effect of the pivoting of the latch 52 until reaching the intermediate distal position when the locking member 62 rests on the distal tip 574, then the thrust stop 70 advances to return the latch 52 to the neutral position.
  • the locking member 62 can remain stuck in the locking channel 53 resting on the distal tip 574, which corresponds to the second unstable configuration in which the latch 62 is in the second unstable position described above.
  • the use of the lower pushing device 10 and the lower visualization means previously described are practical to allow an operator to visualize this jamming in order to remedy it.
  • the lower muffle 3 is moved downward, as shown schematically by the arrow DE, so that the locking member 62 slides inside the locking channel 53 in the exit direction (upwards), until come to rest against the distal rim 572 of the latch 52, thus pushing the latch 52 which then pivots in the direction of proximal rotation (upwards) until reaching the proximal position, as illustrated in Figure 16 , thus allowing the locking member 62 to exit the locking channel 53 and to disengage from the latches 52.
  • the thrust stop 70 remains all the time in its maximum advanced position, the latch 52 leaving the contact with its free front end 71 by pivoting towards the proximal position.
  • the latch 52 presses against the proximal stop 79, which it crushes slightly under the stress exerted by the locking member 62.
  • the locking member 62 is completely released from the locking mechanism 5 and the latch 52 has returned to the neutral position under the effect of the proximal stop 79 and its own weight, and thus the lower muffle 3 and the upper muffle 4 are disconnected.
  • the thrust stop 70 is in the disconnection recoil position, and the mark 83 is in correspondence with the visual disconnection reference 81 or 85, which allows the operator to visualize the disconnection and thus continue the descent of the muffle lower 3 alone in the disconnected configuration, without the upper muffle 4 which remains at the level of the distributor carriage 9.
  • connection and disconnection phases it is advantageous to automate the movements of the lower block 3, in the connection phase and in the disconnection phase, by means of a control/command unit which controls the lifting winch.
  • a control/command unit which controls the lifting winch.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Jib Cranes (AREA)
  • Load-Engaging Elements For Cranes (AREA)
EP23170289.5A 2022-05-04 2023-04-27 Doppelblasheber mit verbessertem verriegelungsmechanismus Pending EP4273085A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2204233A FR3135259B1 (fr) 2022-05-04 2022-05-04 Dispositif de levage à double mouflage avec mécanisme amélioré de verrouillage à loquet

Publications (1)

Publication Number Publication Date
EP4273085A1 true EP4273085A1 (de) 2023-11-08

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EP23170289.5A Pending EP4273085A1 (de) 2022-05-04 2023-04-27 Doppelblasheber mit verbessertem verriegelungsmechanismus

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US (1) US20230356988A1 (de)
EP (1) EP4273085A1 (de)
FR (1) FR3135259B1 (de)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306469A (en) * 1965-06-22 1967-02-28 Richier Sa Load hoisting tackle
FR1520612A (fr) 1967-02-22 1968-04-12 Potain & Cie Ets F Dispositif pour augmenter la charge et la portée maxima d'une flèche de grue distributrice
FR2131924A1 (de) 1971-04-05 1972-11-17 Kroll As F
FR2137333A1 (de) 1971-05-12 1972-12-29 Potain Sa
FR2228024A1 (en) 1973-05-02 1974-11-29 Richier Sa Changeover for tower crane lifting hook - latch changes four strand pulley system to two strand
FR2333743A1 (fr) 1975-12-01 1977-07-01 Pingon Manubat Sa Chariot distributeur pour appareils de levage
FR2368431A1 (fr) 1976-10-22 1978-05-19 Potain Sa Double mouflage automatique pour le chariot distributeur d'une grue a tour
DE3149690A1 (de) 1981-12-15 1983-06-23 Liebherr-Werk Biberach Gmbh, 7950 Biberach Vorrichtung zum umscheren des hubseils bei kranen
DE3543214A1 (de) 1985-06-13 1986-12-18 Liebherr-Werk Bischofshofen GmbH, Bischofshofen Vorrichtung zum umscheren der durch ein seil mit der laufkatze eines krans verbundenen unterflasche des kranhakens
GB2176456A (en) 1985-04-26 1986-12-31 Man Wolffkran Apparatus for changing over the operation of the lifting cable in a crane
ITMI20101302A1 (it) * 2010-07-15 2012-01-16 F B F Lli Butti S R L Dispositivo per variare automaticamente il sistema di taglia in apparecchi sollevatori, particolarmente per gru a torre.
FR3114090A1 (fr) * 2020-09-16 2022-03-18 Manitowoc Crane Group France Dispositif de levage à double mouflage avec mécanisme de verrouillage à loquet

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306469A (en) * 1965-06-22 1967-02-28 Richier Sa Load hoisting tackle
FR1520612A (fr) 1967-02-22 1968-04-12 Potain & Cie Ets F Dispositif pour augmenter la charge et la portée maxima d'une flèche de grue distributrice
FR2131924A1 (de) 1971-04-05 1972-11-17 Kroll As F
FR2137333A1 (de) 1971-05-12 1972-12-29 Potain Sa
FR2228024A1 (en) 1973-05-02 1974-11-29 Richier Sa Changeover for tower crane lifting hook - latch changes four strand pulley system to two strand
FR2333743A1 (fr) 1975-12-01 1977-07-01 Pingon Manubat Sa Chariot distributeur pour appareils de levage
FR2368431A1 (fr) 1976-10-22 1978-05-19 Potain Sa Double mouflage automatique pour le chariot distributeur d'une grue a tour
DE3149690A1 (de) 1981-12-15 1983-06-23 Liebherr-Werk Biberach Gmbh, 7950 Biberach Vorrichtung zum umscheren des hubseils bei kranen
GB2176456A (en) 1985-04-26 1986-12-31 Man Wolffkran Apparatus for changing over the operation of the lifting cable in a crane
DE3543214A1 (de) 1985-06-13 1986-12-18 Liebherr-Werk Bischofshofen GmbH, Bischofshofen Vorrichtung zum umscheren der durch ein seil mit der laufkatze eines krans verbundenen unterflasche des kranhakens
ITMI20101302A1 (it) * 2010-07-15 2012-01-16 F B F Lli Butti S R L Dispositivo per variare automaticamente il sistema di taglia in apparecchi sollevatori, particolarmente per gru a torre.
FR3114090A1 (fr) * 2020-09-16 2022-03-18 Manitowoc Crane Group France Dispositif de levage à double mouflage avec mécanisme de verrouillage à loquet

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US20230356988A1 (en) 2023-11-09
FR3135259A1 (fr) 2023-11-10
FR3135259B1 (fr) 2024-05-03

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