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EP3263505B1 - Lastanzeigevorrichtung, insbesondere für einen hebering - Google Patents

Lastanzeigevorrichtung, insbesondere für einen hebering Download PDF

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Publication number
EP3263505B1
EP3263505B1 EP16177296.7A EP16177296A EP3263505B1 EP 3263505 B1 EP3263505 B1 EP 3263505B1 EP 16177296 A EP16177296 A EP 16177296A EP 3263505 B1 EP3263505 B1 EP 3263505B1
Authority
EP
European Patent Office
Prior art keywords
lifting
indicator
accessory
deformable member
deformable
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.)
Active
Application number
EP16177296.7A
Other languages
English (en)
French (fr)
Other versions
EP3263505A1 (de
Inventor
Christophe LOSANGE
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.)
Intelprop SA
Original Assignee
Intelprop SA
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 Intelprop SA filed Critical Intelprop SA
Priority to EP16177296.7A priority Critical patent/EP3263505B1/de
Priority to PCT/EP2017/065993 priority patent/WO2018002136A1/fr
Priority to EP17734712.7A priority patent/EP3478622A1/de
Publication of EP3263505A1 publication Critical patent/EP3263505A1/de
Application granted granted Critical
Publication of EP3263505B1 publication Critical patent/EP3263505B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
    • B66C1/66—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/34—Crane hooks
    • B66C1/40—Crane hooks formed or fitted with load measuring or indicating devices

Definitions

  • the present invention generally relates to the field of lifting accessories such as rings, hooks, links, chains, slings etc.
  • the present invention more particularly relates to a load indicator device for mounting on such a lifting accessory.
  • Lifting rings are used to secure heavy loads (eg containers, vehicles or construction parts) that require moving, whether on construction sites, in factory warehouses or in harbors. .
  • Lifting rings attached to a load are connected to a lifting hook by slings or chains. It will be noted in passing that in this case it is advantageous to use rotating lifting rings, in order to allow an orientation of the ring with respect to the load being handled.
  • An important goal for manufacturers of lifting accessories is to ensure safety for users, including sizing of parts, choice of materials and manufacturing.
  • the lifting ring and / or the chain-sling can be exposed to an overload, that is to say to a tensile force exceeding the nominal load, including with the safety factors. This can cause plastic deformation of the part and change the mechanical characteristics of the lifting accessory. These situations are not necessarily easily noticeable, especially when the deformation does not lead to break. There is therefore a risk of reusing an overloaded lifting accessory, which endangers the operators and the proper execution of the handling.
  • This type of control means has the advantage of being simple to set up and does not involve adding extra room to the ring, since it is usually included in the shape of the ring.
  • the visual identification by the user is not easy.
  • the indicator is a small protuberance molded into the shape of the ring, and has no distinct color compared to the rest of the ring. The user must compare the form of the indicator with its initial form, which implies a margin of error rather coarse. The error is even greater than the lifting accessory is not always easily accessible from near, with the naked eye. Only an obvious plastic deformation is detectable.
  • Such a device essentially prevents an imminent rupture of the part, and requires a regular and binding control for the user.
  • Another device offers an electronic solution for measuring the load experienced by a lifting accessory.
  • the accessory is equipped with sensors and light indicators that inform the user of the correct operation of the device, an optimal load, or the exceeding of a limit load exerted on the lifting accessory.
  • Such a device thus makes it possible to visually identify an overshoot, more obviously compared to the previous solution.
  • the marking can be done by an external device, such as a computer, which receives a signal from each lifting device. This allows instant control of multiple devices.
  • this solution imposes a complex and expensive manufacturing. The device does not adapt to different lifting accessory, and its replacement in case of malfunction or breakage, requires a complete replacement of the lifting accessory.
  • control device that includes a mechanical fuse that breaks in case of overload.
  • the mechanical fuse is a metal rod positioned in parallel with two links of a chain. The rod has two ends respectively fixed on two successive links of the chain.
  • Such a device is simple and visually identifiable in case of overload.
  • the fuse makes it impossible to disconnect the lifting accessories.
  • the device is defined during the design of the chain and can not be adapted to different accessories, nor be replaced in case of maintenance, or exchanged according to a need for use. This solution offers little flexibility of use.
  • a last known solution is disclosed in the patent application WO 2008/007961 .
  • This document describes a lifting device comprising a first lifting part and a second lifting part which are engaged so as to allow the transmission of a lifting force.
  • the two pieces are connected through a plastically deformable metal indicator under the action of a predetermined pressure force.
  • the indicator includes a deformation zone which constitutes a visual cue indicating an exceeding of a load limit.
  • the device is purely mechanical and simple to manufacture.
  • the device requires two lifting elements with complementary parts, so a certain complexity in its installation.
  • the visual indicator is again a location of the deformation of a relatively small room. This requires the user to have access close to the parts to be checked, and implies a certain inaccuracy in the evaluation of the overload exerted on the lifting accessories.
  • the object of the present invention is to propose a solution for indicating an overload at the level of a lifting accessory that makes it possible to solve the problems raised by the existing solutions.
  • the object of the present invention is in particular to provide a load indicator device intended to be mounted on a lifting accessory, which is purely mechanical, simple assembly and manufacture, and allows an indication easily identifiable visually.
  • the present invention provides a load indicator device for a lifting accessory comprising, a body adapted to be attached to a so-called “lifting" portion of a lifting accessory; a deformable member plastically associated with the body and positioned to be in use in compression between said lifting portion and a lifting member coupled to the lifting accessory for transmitting a lifting force.
  • the "lifting part” corresponds to the region of the lifting accessory normally in contact with the lifting element applying the lifting force.
  • the lifting part is therefore able to receive and transmit to the rest of the accessory a lifting force, in a so-called normal use of the lifting accessory.
  • this zone corresponds to the two curved parts of the link.
  • the hoist portion generally corresponds to the portion of the hoist loop remote from the body of the ring.
  • the device comprises a cover which, in an initial position, hides an indicator.
  • the device further comprises a deformable member designed so that, when the transmitted force exceeds a predetermined threshold, the deformable member deforms, causing the displacement of the cover so as to reveal at least partly the indicator.
  • the invention is an assembly of mechanical parts intended to be mounted on any type of lifting accessory.
  • the deformation of the deformable member for a predetermined force causes the exposure of an easily identifiable visual indicator. Unlike some known devices, it is not at the level of the deformable member that the deformation must be visually detected, but on a separate indicator of the deformable member. It is therefore possible to use an indicator having a surface whose size is chosen by design, independently of the dimension of the deformable member, and which is positioned so as to be easily identifiable.
  • the predetermined threshold of compressive force from which the deformable member deforms so as to trigger the cover can be set by the manufacturer to any desired value.
  • the threshold may be equal to the maximum usable load (CMU), or be set to a higher value within the limit of a safety factor. In some applications, the predetermined threshold may be set to a value lower than the CMU.
  • the device is able to be disassembled in the event of maintenance or for use on another accessory.
  • the body advantageously comprises a bearing face in contact with the lifting part, the bearing face preferably having a shape complementary to the lifting part.
  • the bearing face has a shape suitable for any type of lifting accessory or a target type of lifting accessory, such as lifting rings, or a range of products from a specific manufacturer.
  • the bearing surface is preferably complementary to the lifting accessory, and extends over a lifting portion of the lifting accessory.
  • the device is mounted on a curved lifting portion, the inner side, for example a U-shaped part flat or curved bottom.
  • the body also comprises a base portion having a face participating in the bearing face and an opposite support face, receiving the deformable member.
  • the deformable member is preferably made of metal (but the plastic can not be excluded for low loads), made in one piece with the body.
  • the deformable member may comprise any structure suitable for resisting compression to a pre-definable threshold, and then crashing by plastic deformation.
  • one or more plastically deformable metal blades may be used, preferably several parallel metal blades; or a network of columns or metal beams plastically deformable (small section).
  • the use of such plastically deformable elements provides a design in which the plastic deformation of the organ is accurately determined by the design of these lamellae or mini-columns. This allows greater flexibility in the choice of force from which the organ deforms plastically.
  • the metal blades or mini-columns preferably extend parallel to the direction of application of the compressive force.
  • the deformable member may be directly in contact with the lifting element which applies the pulling force.
  • the deformable member comprises a distribution plate (non-deformable) intended to be in contact with the lifting element on its outer face, and configured to receive the force transmitted by the latter.
  • the distribution plate is in contact, by its inner face, plastically deformable elements.
  • the distribution plate (which is not intended to deform plastically before the slats or mini-columns, etc.) allows to receive a pressure force corresponding to the lifting force exerted on the lifting accessory, and to distribute this pressure force more uniformly on the plastically deformable elements of the deformable member.
  • the distribution plate has at least one actuating surface coming into contact with the cover, which makes it possible to move the hood by direct contact.
  • the distribution plate thus transmits part of the pressure force it receives on the hood.
  • the indicator is a color zone of good visibility, which slices the colors of the neighboring parts of the device and the ring, in order to obtain a good visual contrast when the cover jumps.
  • the indicator is an area that easily differs from all other parts of the device, or at least neighboring parts. Once visible, the indicator is remarkable by the user at a distance of several meters. The notification of the indicator is then not performed only during a verification or maintenance operation, but immediately after the appearance of the indicator. This allows a real-time indicator alert function for the user.
  • the indicator is positioned to be visible at different angles of view of the device, on an outer periphery of the lifting portion.
  • Fastening means for attaching the body to the lifting member comprises a housing configured to grip the lifting member between the body and said housing.
  • the casing and the body extend respectively on the same length of the lifting part and are complementary sections, substantially U-shaped, so that, once associated, surround the lifting portion over the entire periphery.
  • the casing and the body are preferably held together by complementary shapes (positive mechanical engagement).
  • the cover preferably has a shape substantially U complementary to the housing.
  • the device surrounds the lifting part of the lifting accessory and covers it on its contact area with a lifting element.
  • the large area covered by the device provides greater flexibility in the arrangement of the indicator.
  • the indicator is arranged to be visible to the user from a wide angle of view and therefore the security alert function of the device is more efficient.
  • the indicator is thus positioned on the outer surface of the housing, under the hood in the initial position.
  • the indicator could alternatively be provided on the body, by providing a cutout of the housing surrounding the indicator positioned on the body, and providing an initial position of the cover covering the indicator.
  • the cover comprises fastening means in the initial position.
  • the hood In the initial position, the hood is thus retained so as not to be moved involuntarily and to avoid creating false alarm situations.
  • the fastening means of the cover are preferably fixing means by elastic deformation, the body having means for fixing the cover in the initial position, complementary to those of the cover.
  • the hood is thus held in the initial position by a fastener adapted to deform under the action of a pressure force; and to break free or break for a predetermined pressure force.
  • the deformable member is metal, so as to withstand high pressure forces which are forces exerted on the lifting accessory in normal use cases.
  • the deformable member has come from body material, so as to simplify the variety of parts of the device, but also to ensure optimal fixation of the deformable member on the body which will not be modified by the forces induced during the plastic deformation of the organ.
  • the present invention also relates to a lifting accessory comprising the present load indicator device.
  • the lifting accessory is: a lifting ring, a hook, a link or a half-link.
  • the invention also relates to a rotating lifting ring comprising a catching loop, mounted on a body in which a bore is made, and a screw fastener passing through the bore, the present load indicator being mounted. in the interior space of a curvature of the hanging loop away from the body
  • FIG. 1 there is shown an exploded view of the present charge indicator device (or charge limit indicator device) according to one embodiment. It mainly comprises a body 12, a plastically deformable member 14, an indicator 18 (here preferably placed on a fastening means 16) and a cover 20.
  • the cover 20 conceals, in an initial position, the indicator 18; and the organ deformable 14 is designed such that beyond a predetermined force, the deformable member 14 is deformed, causing the displacement of the cover 20 so as to reveal at least partially the indicator 18.
  • the device 10 is intended to be fixed on a lifting accessory 22, and more specifically to a lifting part P of the latter, as shown in FIG. figure 2 .
  • the lifting element 22 is here a pivoting lifting ring 22, with double articulation.
  • Such pivoting rings are widely known in the field and typically comprise a rotating member of generally annular shape, called a ring or catching loop 22 1 , mounted on a body 22 2 in which a bore is made, and a fixing member to screw 22 3 passing through the bore.
  • the screw fastener 22 3 comprises a head 22 4 serving as a stop for the body 22 2 and a threaded portion 22 5 (or threaded) to allow it to be fastened by screwing into a threaded hole or onto a threaded rod integral with the load to lift.
  • Ring 22 of the figure 2 therefore has a first pivot axis A corresponding to the axis of the fastener 22 3 ; and the loop 22 1 is articulated on the body 22 2 , defining a second pivot axis B, perpendicular to the first.
  • Such rotating rings with single or double articulation, are described for example in the EP1069067 or EP2361870 and the device 10 is intended to be used with this type of rings, among others.
  • the device 10 is easily adaptable to other lifting accessories, such as a hook, a link (chain) or a half-link.
  • the device 10 has the overall shape of a half-disc, seen in the plane of the interior opening 24 defined by the hooking loop 22 1 (of vertical-longitudinal orientation in Fig.2 ).
  • a lifting accessory allows the transmission of a lifting force for moving a load or element to be lifted.
  • the lifting forces are generally transmitted by another lifting accessory, which will be called lifting element, and coupled to the first lifting accessory (this lifting element being connected for example to the hook of the hoisting machine).
  • the device 10 is mounted on the lifting loop 22 1 of the ring 22 at a portion that will be stressed in traction by mechanical contact, at a point, several points, or a plane, this region being called lifting part P, and this by the lifting element coupled to the loop 22 1 (shown in broken lines) transmitting the lifting force.
  • the schematized lifting element is a chain link, but it could be a hook, a sling, etc.
  • the lifting part P corresponds to the curved part of the hooking loop 22 1 , distal from the ring body.
  • the device 10 will be placed on a lifting portion P of a lifting accessory in order to be compressed between the lifting portion and the lifting element transmitting the lifting force.
  • the body 12 of the device 10 is illustrated in detail in FIG. Figure 3 .
  • the body 12 is a metal part intended to be fixed on the lifting element 22 at the lifting part P of the loop 22 1 .
  • the body 12 is substantially crescent-shaped, so as to conform to the curvature of the interior space of the catch loop 22 1 .
  • the body 12 is, in use, positioned in compression between the lifting accessory 22 and the lifting element.
  • the body 12 undergoes a pressure / compression force equal to the tensile force exerted on the lifting element 22.
  • the body 12 comprises a bearing surface 26 coming into contact with the lifting element 22.
  • the bearing face 26 has a shape complementary to the lifting element 22.
  • the bearing surface 26 thus comprises a groove 28 which matches the curvature of the loop 22 1 of the ring, which allows to better distribute the forces exerted on the device 10 to the lifting element.
  • the cross section of the groove 28 is substantially U-shaped, so as to surround a portion, e.g. about one-half of the periphery of the snap buckle 22 1 .
  • the body 12 also advantageously comprises two positioning ends 30.
  • the positioning ends are made of solid metal and arranged on either side of the body 12.
  • Each positioning end 30 has an inner face 32 in a vertical-transverse orientation plane facing the space between the positioning ends 30.
  • the body 12 comprises a base portion 34 which connects the ends 30 of material.
  • the base portion 34 is thus positioned centrally in the body 12 and partially defines the bearing face 26.
  • the part of base 34 comprises a support face 38 in a longitudinal-transverse orientation plane, opposite to the bearing face 26, and two lateral faces 36 in vertical-longitudinal orientation planes, which connect the bearing faces 26 and support 38.
  • the base portion 34 also comprises fastening means 40 of the cover 20.
  • the holding means 40 are positioned on the lateral faces 36, on either side of the base portion 34.
  • the holding means 40 are here made of material of the body 12, and are presented as two triangular projections having a lower face 42 in a transverse-longitudinal orientation plane.
  • the body 12 also carries the deformable member 14.
  • the deformable member 14 is arranged on the body 12 against the support face 38, opposite to the bearing face 26.
  • the deformable member 14 is preferably made of body material 12 at the support surface 38.
  • the figure 4 illustrates in detail a possible embodiment of the deformable member 14 arranged on the base 34. It comprises a set of deformable metal blades 44, which extend parallel and substantially perpendicular to the support surface 38 of the base 34.
  • the set of metal blades 44 is configured to deform from a predetermined threshold value of pressure force, denoted Fs, exerted, in compression, thereon.
  • the design of the device is such that the plastic deformation of the deformable member, that is to say the crushing of the blades, will generate the release of the cover 20.
  • the predetermined threshold Fs, beyond which the deformable member deforms plastically, is determined by design, at any value desired by the manufacturer. As will be understood, once the deformable member 14 has undergone plastic deformation, it can not resume its initial configuration. This unique use character is a guarantee of security.
  • each blade 44 extends respectively from the face 38 opposite to the bearing face 26, to a distribution plate 48.
  • each blade 44 extends in a nonlimiting manner perpendicularly to the support face 38 of the base 34, so as to be substantially parallel to the compression direction of the member 14 (in the figure in the vertical direction V).
  • the blades 44 can extend in another direction.
  • the compression member may take a different shape: it may be a set of plastically deformable element zig-zag, or a set of deformable mini-columns, for example square base.
  • a lifting accessory is designed for a given operating load, which is reported as the maximum usable load CMU.
  • the manufacturer provides a margin of safety by applying a coefficient during the design (eg 2.3 or 4 times the CMU).
  • the force applied to the lifting accessory exceeds the safety factors, it causes a plastic deformation thereof. Once the accessory deformed plastically, its mechanical properties are modified. The accessory can no longer support the same load before deforming again or even breaking. The new properties of the lifting accessory are not predictable, and the risk of breakage is difficult to evaluate. For safety reasons, it is important not to use a lifting accessory once it has undergone a first plastic deformation.
  • the set of blades 44 is dimensioned so that it is deformed and ejects the cover 20 for a threshold value of pressure force Fs applied, which does not exceed the force F D .
  • the threshold value Fs corresponds to a force greater than the force applied to the lifting accessory for normal use thereof (beyond the CMU), and remaining within the safety margin (therefore below at F D ).
  • the lifting accessory can be preserved and used with a new device after replacing the device with the fully deformed blade assembly. Note however that if the device 10 is triggered, it is recommended to have the lifting accessory checked by an expert to ensure its integrity.
  • the distribution plate 48 is a metal plate which has an inner face 50 attached to the metal blade assembly 44 and an outer face 52 configured to be in contact with the lifting member coupled to the lifting ring.
  • the outer face 52 may be of complementary shape to the lifting accessory.
  • the distribution plate 48 is placed between the inner faces 32 of the positioning ends 30 of the body 12.
  • the inner faces 32 constitute stops in longitudinal displacement of the distribution plate 48.
  • the distribution plate 48 is ideally not deformable under the action of a lifting force (in any case for forces below Fs). In this way, even after deformation of the set of deformable blades 44, the contact between the device and the lifting accessory remains unchanged. A predefined contact between the device 10 and the lifting accessory makes it possible to have a predictable behavior in deformation of the deformable blades 46 and to simplify the dimensioning of the parts of the device.
  • the distribution plate 48 also has flanges 54 protruding transversely on either side of the body 12.
  • the flanges 54 are intended to come into contact with the cover 20 and thus constitute surfaces In the initial position, it is possible to preserve a slight clearance between the flanges 54 and the cover, in order to take into account any manufacturing tolerances and deformation of the member 14 before reaching the threshold Fs.
  • fastening means 16 are provided, which include a housing 58 which allows the device 10 to be held around the lifting accessory 22.
  • the bearing surface 26 of the body 12 has two edges 56, which are located transversely on both sides of the groove 28 for the lifting element, and are in contact with the housing 58.
  • the casing 58 is preferably a piece of rigid plastic material, complementary in shape to that of the lifting accessory 22 at its lifting portion P.
  • the housing 58 has a substantially U-shaped cross section, as shown in FIG. the figure 5 .
  • the casing 58 is thus able to surround a part, e.g. about a half, from the periphery of the lifting accessory.
  • the housing 58 has an inner face 60 in contact with the hooking loop 22 1 , and an outer face 62 opposite.
  • Each branch of the U formed by the housing terminates in an edge 64 which connects the inner 60 and outer 62 faces. These edges 64 are mounted in contact with the edges 56 of the body 12.
  • edges 64 of the casing 58 comprise four endings 65 in the form of hooks.
  • the terminations are arranged symmetrically at the two longitudinal ends of each edge 64.
  • the hooks 65 are complementary to the positioning ends 30 of the body 12, and are intended to be snugly fastened to said positioning ends 30 so as to maintain the edges 64 in position. contact with edges 56.
  • edges 64 and edges 56 are kept in contact by conventional fastening means, for example by elastic interlocking, screw nut systems, or by rivets.
  • the body 12 and the housing 58 once associated, completely surround the lifting accessory at the lifting portion P. Ideally, the connection between the body 12 and the housing 58 realize a tightening of the lifting accessory between the elements of the device 10.
  • the housing 58 and the body 12 are also removable.
  • the device 10 can thus be replaced or exchanged.
  • the housing 58 also includes the indicator 18, intended to alert a user to exceed a predetermined load on the lifting accessory.
  • the indicator 18 is positioned on the outer face 62 of the housing 58.
  • the indicator 18 is here an area of the outer face 62 which has a color of good visibility, that is to say, making it easy to distinguish visually by relative to the surrounding colors or other parts of the device 10.
  • the indicator 18 therefore has a sharp color of the housing and the cover (which are preferably of the same color).
  • the indicator 18 is bright and fluorescent color, such as fluorescent yellow or fluorescent orange.
  • the hoist ring may have an orange, red, pink or yellow hook-and-loop fastener, the casing a green color, and the indicator a bright red or orange or fluo color.
  • the indicator 18 occupies an area that extends at least over a transverse periphery of the casing 58 in U, connecting the edges 64 of the housing 58. In this way, the indicator 18 is likely to be visible at a wide angle for observing the device 10, ideally covering substantially more than one half-sphere around the device 10.
  • the indicator 18 extends in a longitudinal direction over a length equal to that of the distribution plate 48 of the body 12, and opposite said distribution plate 48.
  • the device 10 is designed so that the indicator 18 is covered by the cover 20 in the initial position (that is to say without deformation of the member 14), for a pressure force exerted on the blade assembly 44 below the threshold value Fs.
  • the cover 20 is a piece of plastic material in the form of a curved rectangular blade, of width in a longitudinal direction at least equal to that of the indicator 18. As shown in FIG. figure 5 , the hood 20 has a section along a U-shaped vertical-transverse orientation plane complementary to that of the housing 58. Thus, the general shape of the hood 20 surrounds the periphery of the housing 58.
  • the cover 20 has an inner face 66 facing the indicator 20, and an outer face 68 opposite.
  • the two ends of the U formed by the cover 20, comprise two thrust surfaces 70.
  • the thrust surfaces 70 are flat, complementary to the flanges 54 of the distribution plate 58.
  • the surfaces of thrust 70 are in contact with the flanges 54, or close.
  • the cover then covers the set of deformable blades 44, the base portion 34 of the body 12, and the indicator 20. The set of deformable blades is thus protected, which avoids the intrusion of foreign bodies.
  • the side faces 36 are preferably recessed with respect to the ends 30, and the housing area where the indicator 18 is positioned is also set back, which allows to receive the cover 20 so that it is integrated in housing without protruding part. This avoids a tear of the hood 20 during handling.
  • the cover 20 also comprises complementary fastening means 68 of the attachment means 40 of the base portion 34 of the body 12.
  • the fastening means 68 allow the hood to be locked by elastic deformation.
  • the shape of the fastening means 68 is clipped against the lower faces 42 of the fastening means 40 complementary to the base portion 34.
  • the device 10 In the normal use configuration, the device 10 is positioned in compression between the lifting accessory 22 on which it is mounted, and a lifting member which transmits a lifting force to the lifting member.
  • the device 10 is subjected to a pressure force equal to the transmitted lifting force, and remains in this configuration as long as the transmitted lifting force is below the threshold Fs.
  • the cover 20 is in the initial position, in which it hides the indicator 20, and the thrust surfaces 70 of the cover 20 are in contact with the flanges 54 of the distribution plate 48.
  • the alert configuration is represented with reference to the figure 7 .
  • the distribution plate 48 exerts on the deformable elements 44 a pressure which leads to their deformation, crushing: the distribution plate then moves towards the base 34, and therefore the cover 20. The cover 20 is pushed by the distribution plate 48 at the thrust surfaces 70.
  • the cover 20 moves vertically, pushed by the distribution plate 48 until the locking means 72 of the cover 20 deform and unhook the holding means 40 of the body 12.
  • the cover 20 is suddenly released from the means of maintaining 40; the indicator 18 is then discovered and becomes visible to the user.
  • the locking means 72 of the cover break, so as to make it impossible to replace the cover 20 after exceeding the threshold Fs.
  • the cover 20 is ejected out of its initial position for exceeding a predetermined pressure force. It moves only between two positions: a position in which the cover 20 completely hides the indicator 18, and a position in which the cover 20 is away from the indicator 18 which is fully visible.
  • the device 10 makes it possible to alert a user effectively of the occurrence of an overload on the lifting accessory 22.
  • the body 12 is preferably made in one piece (monoblock) with the deformable member, in all materials suitable for the intended use, in particular as regards the resistance to mechanical stresses applied to the device in use and the deformation deformable organ.
  • a metal e.g. steel, titanium or any suitable alloys.
  • the manufacture of the body with the deformable member can be done by machining, injection or 3D printing (additive construction). For less important loads it will be possible to make the body / deformable body assembly plastic.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Claims (15)

  1. Vorrichtung (10) zur Lastanzeige für ein Hebezubehörteil, das Folgendes umfasst:
    einen Körper (12), der sich an einem Hebeteil (P) eines Hebezubehörteils (22) befestigen lässt;
    ein plastisch verformbares Organ (14), das dem Körper (12) zugeordnet und so positioniert ist, dass es sich im Einsatz unter Druckbelastung zwischen dem Hebeteil (P) und einem Hebeelement befindet, das an das Hebezubehörteil (22) zum Übertragen einer Hebekraft angekoppelt ist;
    dadurch gekennzeichnet, dass die Vorrichtung (10) eine Abdeckkappe (20) umfasst, die in einer Ausgangsposition einen Indikator (18) verbirgt;
    und dass das verformbare Organ (14) so ausgelegt ist, dass wenn die übertragene Kraft einen Schwellenwert (Fs) überschreitet, das verformbare Organ (14) sich plastisch verformt und eine Verlagerung der Abdeckkappe (20) so hervorruft, dass mindestens ein Teil des Indikators (18) erkennbar wird.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Körper (12) eine Anlagefläche (26) in Kontakt mit dem Hebeteil (P) umfasst, wobei die Anlagefläche (26) vorzugsweise eine zum Hebeteil (P) komplementäre Form aufweist.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der Körper (12) einen Basisteil (34) mit einer Fläche umfasst, die die Anlagefläche (26) und eine Tragfläche (38), die der Anlagefläche gegenüber liegt und das verformbare Organ (14) aufnimmt, definiert.
  4. Vorrichtung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass das plastisch verformbare Organ (14) ein oder mehrere verformbare Elemente umfasst, die zwischen der Tragfläche (38) und einer Verteilungsplatte (48) angeordnet sind, die dafür bestimmt ist, mit dem Hebeelement in Kontakt zu sein, um die vom Hebeelement übertragene Kraft aufzunehmen und die Druckkraft auf ein oder mehrere verformbare Elemente aufzubringen.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Verteilungsplatte (48) mindestens eine Betätigungsfläche (54) aufweist, die die Abdeckkappe (20) durch Kontakt verlagern kann.
  6. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das verformbare Organ (14) mindestens eine plastisch verformbare Metalllamelle (46), vorzugsweise mehrere parallele Metalllamellen, aufweist.
  7. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das verformbare Organ (14) ein Raster von plastisch verformbaren Metallsäulen umfasst.
  8. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Indikator (18) ein gut sichtbarer Farbbereich ist, der sich von den Farben der benachbarten Elemente der Vorrichtung unterscheidet.
  9. Vorrichtung nach einem der vorangehenden Ansprüche, gekennzeichnet durch Befestigungsmittel (16) für die Befestigung des Körpers (12) an dem Hebeelement (22), das ein Gehäuse (58) umfasst, das so gestaltet ist, dass es das Hebeelement (22) zwischen dem Körper (12) und dem Gehäuse (58) umschließt.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass das Gehäuse (58) und der Körper (12) sich jeweils auf einer gleichen Länge des Hebeteils (P) erstrecken und von komplementärem, im Wesentlichen U-förmigem Querschnitt sind, und zwar so, dass sobald sie vereint sind, sie das Hebeteil einschließen; wobei das Gehäuse (58) und der Körper (12) vorzugsweise durch die Komplementarität der Formen zusammengehalten werden.
  11. Vorrichtung nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass die Abdeckkappe (20) eine zum Gehäuse (58) komplementäre Form aufweist, die im Wesentlichen eine U-Form ist.
  12. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Abdeckkappe (20) in der Ausgangsposition Befestigungsmittel (72) aufweist, die mit den Befestigungsmitteln zusammenwirken, die auf dem Körper (40) für die Beibehaltung der Ausgangsposition der Abdeckkappe (20) vorgesehen sind; wobei die Befestigungsmittel (72) der Abdeckkappe (20) vorzugsweise durch elastische Verformung gebildete Blockierungsmittel sind.
  13. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das verformbare Organ (14) einstückig mit dem Körper (12), vorzugsweise aus Metall, gebildet ist.
  14. Hebezubehörteil (22), das eine Vorrichtung (10) zur Lastanzeige nach einem der vorangehenden Ansprüche umfasst, wobei das Hebezubehörteil insbesondere ein Hebering, ein Haken, ein Schäkel oder ein Halbschäkel ist.
  15. Drehbarer Hebering, der einen Anschlagbügel (221), der auf einen Körper (222) montiert ist, in dem eine Bohrung gefertigt ist, sowie ein Schraubbefestigungsorgan (223) umfasst, das durch die Bohrung hindurchgeht, wobei eine Lastanzeigevorrichtung nach einem der Ansprüche 1 bis 13 in den Innenraum einer vom Körper entfernten Krümmung des Anschlagbügels montiert ist.
EP16177296.7A 2016-06-30 2016-06-30 Lastanzeigevorrichtung, insbesondere für einen hebering Active EP3263505B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP16177296.7A EP3263505B1 (de) 2016-06-30 2016-06-30 Lastanzeigevorrichtung, insbesondere für einen hebering
PCT/EP2017/065993 WO2018002136A1 (fr) 2016-06-30 2017-06-28 Dispositif de témoin de charge, en particulier pour un anneau de levage
EP17734712.7A EP3478622A1 (de) 2016-06-30 2017-06-28 Lastanzeigevorrichtung, insbesondere für einen hebering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16177296.7A EP3263505B1 (de) 2016-06-30 2016-06-30 Lastanzeigevorrichtung, insbesondere für einen hebering

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EP3263505B1 true EP3263505B1 (de) 2019-10-23

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EP17734712.7A Withdrawn EP3478622A1 (de) 2016-06-30 2017-06-28 Lastanzeigevorrichtung, insbesondere für einen hebering

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PL428916A1 (pl) * 2019-02-14 2020-08-24 Łaszkiewicz Grzegorz PROTEKT Indykator upadku

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CA1060483A (en) * 1975-05-01 1979-08-14 American Hoist And Derrick Company Load indicating apparatus
US4052357A (en) 1976-05-19 1977-10-04 Dow Corning Corporation High modulus silicone rubber
US4131050A (en) * 1977-07-05 1978-12-26 The Solon Manufacturing Company Visual load indicator
US4578941A (en) 1984-08-27 1986-04-01 Emerson Electric Co. Load carrying device
JP2676101B2 (ja) * 1988-04-21 1997-11-12 株式会社富士製作所 ウィンチ等の過負荷警報装置
JP2688159B2 (ja) * 1993-03-15 1997-12-08 株式会社キトー 設定荷重超過検出装置
ES2249877T3 (es) 1999-07-09 2006-04-01 S.H.B.L. Anillo articulado para la elevacion de cargas.
CN1887679A (zh) * 2006-06-30 2007-01-03 胡长聚 可称重钩
NL2000139C2 (nl) 2006-07-11 2008-01-14 Partners Voor Strategie & Man Hijsinrichting met overbelastingdetectie.
EP2361870A1 (de) 2010-02-25 2011-08-31 Stamperia Carcano Giuseppe S.p.A. Ringbolzen mit Abschraubvorrichtung
FR2979624B1 (fr) * 2011-09-02 2013-08-23 Aircelle Sa Dispositif de manutention d'une charge
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FR3012802A1 (fr) * 2013-11-06 2015-05-08 Edmond Altabe Anse tournante et articulable

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WO2018002136A1 (fr) 2018-01-04
EP3478622A1 (de) 2019-05-08

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