LU102432B1 - Swivel lifting point for lifting loads - Google Patents

Abstract

A lifting point (10) for lifting loads comprises: a pivoting body (12) with which is associated an attachment means capable of cooperating with a lifting accessory; and a fixing member (14) for fixing the lifting point (10) to the load, the fixing member (14) and the pivoting body (12) being assembled by a pivot connection allowing relative pivoting of the body (12 ) relative to the fixing member (14) along an axis (A). The fixing member (14) comprises a rod (16) which extends along the axis (A) having a head portion (18) at one end and a locking portion (36) disposed at the other end intended to be engaged in a threaded orifice of a load, the locking portion (36) comprising at least one threaded segment (38) retractable through a lateral opening (40) in the rod (16), the threaded segment (38) being adjustable radially with respect to the axis (A) between a locking position in which a thread (42) of the threaded segment (38) protrudes outside the rod (16) and a position of installation in which the threaded segment (38) is retracted into the rod (16).

Description

PIVOTING LIFTING POINT FOR LIFTING LOADS Technical field The present invention generally relates to the field of lifting accessories such as rings, hooks, links, chains, slings, etc.

The present invention relates more particularly to a device called a rotating lifting point or ring.

STATE OF THE ART Pivoting lifting rings in the form of rotating rings, as described in particular in EP1069067, typically comprise a rotating element of generally annular shape, called a hooking ring or loop, mounted on a body in which a bore is produced, and a screw fixing member, passing in the bore, having a head serving as a stop for the body, and a threaded or tapped part to allow its fixing by screwing in a tapped hole or on a threaded rod integral with the load to be lifted.

Slings or lifting chains can be connected to the rotating loop by inserting a hook, shackle, carabiner, etc. into it.

Rotating rings are used in all cases where it may be useful or necessary to allow orientation of the ring relative to the load handled by pivoting the ring along a fixed axis determined by fixing the ring on the load, this fixed axis being generally orthogonal to the surface of the part on which the ring is fixed.

The attachment loop may be rigidly attached to the body, and in this case, generally, the axis of the bore extends in the general plane of said loop which is therefore perpendicular to the surface of the load at the level from the fixing point.

The loop can also be linked to the body in a pivoting manner along an axis orthogonal to the axis of the bore and of the fixing member.

To allow the orientation of the ring, the body can turn freely on the fixing device, which must for its part remain fixed on the load, in order to avoid any risk of unscrewing which could affect the safety of the connection. of the swivel ring on the load.

Since the body is mounted free in rotation on the fixing member, it is necessary to use a tool to screw and tighten the fixing member on the load, and also to loosen and unscrew it when removing the rotating hoist ring. The head of the clamping member is therefore shaped to allow it to be rotated by means of a key, for example with a hexagon or a hexagon socket.

This therefore requires having the appropriate tools both for fitting and removing the lifting rings. However, it would be advantageous to be able to ensure this tightening and untightening manually, without tools.

In this context, for the installation of the ring on a load, it has been proposed to use the annular part of the lifting ring for tightening and loosening the fastening member, which then requires to connect in rotation said annular part and the base. But this connection must not be permanent, to allow free rotation of the ring during lifting operations.

Various systems have therefore already been proposed which make it possible to bind the buckle and the fastening member in rotation temporarily, see for example EP3033291, or EP0654611.

After the manual tightening phase, however, the ring must be tightened using a tightening tool to bear against the load and apply a tightening torque. This takes a bit of time but ensures proper placement of the ring on the load.

Another approach to facilitate the installation of a lifting ring is described in DE 20 2019 106 029 U1. The hoist ring includes a fixing member in the form of a rod comprising threaded segments. The threaded segments can be retracted by pressing on one end of the fixing member in the form of a push button.

allowing the insertion of the fixing member in a tapped hole of the load to be lifted. Releasing the push button causes the threaded segments to come out, the thread of which engages with the thread of the tapped hole, ensuring the screw connection between the lifting ring and the load to be lifted.

Despite the time saved by this ring, it presents a certain risk in use. The swivel axis of the shackle also serves as an axis limiting the movement of the actuating rod and thus passes through the fixing device. If the load is not lifted in the vertical direction (along the axis defined by the fixing device), a torque will be applied to the shackle which causes the ring to rotate, possibly causing it to unscrew. This compromises the security of the connection between the lifting ring and the load to be lifted, which may result in the load to be lifted falling. This risk is increased by the fact that the method of setting up such a ring is essentially manual, and that often a tightening torque is not applied against the load.

OBJECT OF THE INVENTION The object of the present invention is to provide a lifting point that is easy to mount, does not have the aforementioned disadvantages, and provides a higher level of safety.

This object is achieved by a lifting point according to claim 1.

General description of the invention The present invention relates to a lifting point for lifting loads comprising: a pivoting body with which is associated an attachment means capable of cooperating with a lifting accessory; and a fixing member for fixing the lifting point to the load, the fixing member and the pivoting body being assembled by a pivot connection allowing relative pivoting of the body with respect to the fixing member along an axis (A) .

The fixing member comprises a rod which extends along the axis (A) having a head portion at one end and a locking portion arranged at the other end intended to be engaged in a threaded hole in the charge.

The locking portion comprises at least one threaded segment retractable through a side opening in the rod, the threaded segment being adjustable radially with respect to the axis (A) between a locking position in which a thread of the threaded segment protrudes at the outside of the stem and an installation position in which the threaded segment is retracted into the stem.

In this text, the expression "installation position" generally designates the position in which the at least one threaded segment is retracted into the shank of the fastener. This position (or configuration) is used to both when coupling the lifting point to the load to be lifted (i.e. when installing the lifting point) but also when separating the lifting point and the load (i.e. when dismantling the lifting point) Thus, the at least one threaded segment is retracted inside the rod of the fixing member during the insertion of the latter into a threaded orifice of the load to be lifted so that the rod has a dimension external dimension less than the internal dimension of the tapped hole.The fixing device can be inserted therein without friction and without requiring any particular movement (such as for example a screwing movement), which facilitates the installation of the lifting point on the load to be lifted and reduces the time required know to do. Similarly, when dismantling the lifting point, it can be removed simply without the need for unscrewing.

When the at least one threaded segment is in its locking position, its thread protrudes outside the rod so that it is in engagement with the threads of the threaded hole of the load to be lifted , which secures the lifting point on the load and carries the load.

The pivot link can be executed in any suitable way, typically involving nested complementary shapes (conjugation of shapes), for example one of the parts cooperating in the pivot link forming an annular groove and the other part being received in the groove.

It will be appreciated that the pivot connection allows free rotation between the pivoting body of the lifting point and the fixing member so that the lifting point can rotate freely around the fixing member without unscrewing, including during the application of a torque resulting from lifting the load in a direction different from the direction defined by the rod of the fastener.

The lifting point according to the invention is therefore safer to use than that described in DE 20 2019 106 029 U1.

According to preferred embodiments, the rod of the fixing member of the pivoting lifting point is a hollow rod having an internal passage opening on the side of the head portion. An actuating rod is housed in the hollow rod so as to be axially movable between a first and second position, the rod having an actuating structure capable of cooperating with all of the threaded segments in order to bring them into at least one positions. The rod of the fixing member further comprises a push button connected to the actuating rod, at the end opposite the actuating structure, the button being accessible from the head portion of the rod.

According to preferred embodiments, the locking portion of the fixing member comprises several threaded segments, for example 2, 3 or 4, mounted in respective side openings, the threaded segments being operable by means of the actuating rod . The threaded segments are normally distributed circumferentially on the stem, evenly spaced, at the same height on the stem.

The threaded segments are typically inserts (inserts) of generally rectangular shape, with an external curvature corresponding to that of the diameter of the rod, and carrying on their external face parts of threads capable of cooperating with the threads of the tapped hole in which the lifting point attachment is going to be engaged.

In order to ensure a good grip with a tapped hole, the configuration of the threads on each insert may be different. For example, for n threaded segments, the threaded parts of the different segments can be offset by a value of 1/n x the thread pitch (distance between two threads), in a helical increment along the axis.

Advantageously, the fixing member can be arranged so that by default, without application of an actuating force, the actuating rod is in the first position which maintains at least one threaded segment in its locking position.

Applying a force to the actuator rod in the direction of the locking portion will move the actuator rod to the second position in which the threaded segment retracts into the installed position.

In other words, "at least one retractable threaded segment cannot retract into the rod of the fixing member in the absence of pressure on the push button.

Thus, the fixing member cannot be detached from the load to be lifted in the absence of action on the push button, minimizing the risk of the load falling.

According to the same or other embodiments, the hollow rod of the fixing member comprises an internal shoulder forming an axial stop for the push button and defining the second position.

In other words, the movement of the push button along the axis (A) is limited by the internal shoulder.

Advantageously, each threaded segment has, on a face opposite the thread, at least one recess and at least one contact section adjacent to the at least one recess.

According to embodiments, the actuation structure has at least one annular projection bearing on the contact section of the threaded segment when the latter is in the locking position.

Preferably, the annular projection has a geometry complementary to a geometry of the recess.

This configuration of at least one recess, at least one contact section and the actuating structure allows the correct operation of the actuating rod and the precise positioning of the threaded segments between the locking and installation positions .

According to preferred embodiments, the hollow rod of the fixing member passes through a bore of the pivoting body, thus defining the relative pivot axis (A). According to the same or other embodiments, the pivoting body is assembled by means of a flanged sleeve pressed, shrunk or screwed onto the fixing member.

Advantageously, such an assembly allows free rotation of the pivoting body around the fixing member.

According to an alternative design, the attachment means may be a shackle hinged to the pivoting body or a loop formed in one piece with the pivoting body.

Advantageously, the shackle can be articulated on the body so as to pivot along an axis (B) substantially perpendicular to the axis (A) and passing through the fastening member.

In particular, the attachment means may have pins extending along the axis (B) substantially perpendicular to the axis (A) and engaging in respective cavities of the pivoting body.

Alternatively, the pivoting body may have pins extending along the axis (B) substantially perpendicular to the axis (A) engaging in the lugs of the attachment means.

According to yet another alternative, the attachment means may be an integral yoke with the body, and the free ends of the branches of which are linked by a (removable) rod. Brief description of the figures Other particularities and characteristics of the invention will become apparent from the detailed description of at least one advantageous embodiment presented below, by way of illustration, with reference to the appended drawings.

These show: Fig.1 a perspective view of the pivoting lifting point according to a first embodiment; Fig.2 a front view of the lifting point of Fig.1; Fig.3 an exploded view of the lifting point of Fig.1; Fig.4 views in vertical section of the fixing member of the lifting point of Fig.1 in the locking position (4A) and installation (4B); Fig.5 a perspective view of the pivoting lifting point according to a second embodiment; and Fig 6 perspective (6A) and exploded (6B) views of the pivoting lifting point according to a third embodiment.

Detailed description with the help of figures An embodiment of the present lifting point 10 is shown in Fig.1, here in the form of a lifting ring.

It comprises a body 12 of generally annular shape, having a central passage (or bore), traversed by a fixing member 14 formed by a rod 16 comprising a locking portion 36 and a shouldered head 18. The fixing member 14 ensures the functions of fixing the lifting point 10, and pivot axis, allowing the body 12 to rotate freely on the rod 16 of the fixing member 14 along an axis A.

Conventionally, the fixing member 14 is intended to be assembled on a load to be lifted, by engagement of the fixing member in a tapped hole (orifice/blind or through hole) in the load.

The body and the fixing member are generally made of steel.

The shouldered head 18 of the rod 16 may have a hexagonal profile (Fig.1). Alternatively, the shouldered head 118 can be circular in shape (Fig.5). As best seen in Fig.3, in the present embodiment, the body 12 comprises a sleeve 30 (or "flange") threaded over the fixing member 14 to under the head 18 of the screw (shouldered type) . A sleeve 32 is slipped onto the rod 16 of the fixing member 14 and locked on the latter so that in the service position a flange 34 - integral with the sleeve 32 at one of its ends - is located away from the head 18 of the fastener 14. The internal dimensions of the sleeve 30 and external of the sleeve 32, as well as their respective lengths are such that an axial and radial functional clearance (not shown) exists, allowing the sleeve 30 to rotate freely on the sleeve 32 mounted on the fixing member 14, even when the fixing member is locked on the load to be lifted (the sleeve 30 therefore being held axially between the underside of the head 18 of the fixing member 14 —in particular the shoulder thereof— and the internal face of the flange 34). The free rotation between the sleeve 30 and the sleeve 32 thus forms the pivot connection between the body 10 and the fixing member 14, fixedly connected to the sleeve 32. In this variant, the sleeve 32 and flange 34 assembly, also called "base", is pressed and/or shrunk on the cylindrical part of the rod 16 of the fixing member 14, below the shouldered head 18. This is only an example of embodiment and in the context of the invention all kinds of embodiments of the pivot connection can be envisaged. For example, in other variants, the sleeve can have an internal thread and be blocked by screwing on the fixing member, the rod of which would have an external thread under the shouldered head extending over a length along the axis A substantially identical to the length of the socket. According to other variants, the base can be glued or welded to the fixing member, or else the body and the rod of the fixing member can be formed in one piece, for example when the lifting point is manufactured by an additive manufacturing process (see for example EP3405426 for examples of rings manufactured by 3D printing). In the case of additive manufacturing, one could manufacture the body and the hollow rod by 3D printing, then install the threaded segments and the actuation rod. Alternatively, the body may be connected to the fixing member by means of a pin passing through both the body and the fixing member, or the base may have a groove in which a circlip is positioned and tightened in order to to secure the body and the fastener.

Furthermore, the shoulder which axially retains the sleeve 30 on the side of the head 18 of the fixing member 14 (formed here by a shoulder thereof) could be formed by an intermediate piece. Also, if an intermediate piece is used, the base does not necessarily have to reach under the head of the fixing member. As will be understood, those skilled in the art will be able to find all sorts of configurations for assembling the body and the fixing member.

A shackle 20, constituting the attachment means of the lifting point 10, is pivotally mounted on the body 12 so as to be able to pivot along an axis B generally perpendicular to the axis A. The shackle 20 here has a U-shape comprising a crosspiece, and is preferably forged in one piece. The ends 22, 22' of the two branches 24, 24' of the shackle 20 are provided with projecting radial pins 26, 26' (also called "trunnions") which engage in corresponding cavities 28, 28' of the body 12 (Fig.2). The cavities 28, 28' are arranged along the pivot axis B, and can be through or blind.

Alternatively, the attachment means may be a U-shaped shackle 120, preferably forged in one piece. The ends 122, 122' of the two branches 124, 124' of the shackle 120 are provided with holes 128, thus forming lugs which serve as a pivot bearing around the pins 126 projecting from the body 12. Preferably, the lugs are widened and have flattened sides (in the plane perpendicular to the pivot axis B), as best seen in Fig.5.

According to another embodiment, the lifting point attachment means may be a loop 220 formed in one piece with the sleeve 230 of the pivoting body 212 (Fig. 6A and 6B). According to this embodiment, the fixing member is fixed integrally to a base, comprising a sleeve 232 and a flange 234, of the pivoting body, while the sleeve and the buckle formed in one piece are in free rotation around of axis A between the shouldered head of the fastener and the flange 234 of the base.

According to an important aspect, the rod 16 of the fixing member 14 has a locking portion 36 disposed at the end of the rod opposite the end having the shouldered head 18. The locking portion 36 comprises three threaded segments 38 (or threaded inserts) which ensure the locking of the fixing member in a tapped hole of the load to be lifted. In the assembled position of the lifting point 10, the locking portion 36 is located under the sleeve 32 (Fig.2).

As best seen in Fig.4, in the present embodiment, rod 16 is a smooth, hollow rod which extends along axis A. Three apertures 40 are formed in locking portion 36 (two are visible in Figure 3). The openings 40 are oblong and extend in the direction of the axis A, i.e. along the length of the hollow rod 16.

The openings 40 are regularly distributed (equal distances) over the outer circumference of the hollow rod 16, at the same height along the axis A, and open out (i.e. not blind). In other words, the exterior of the hollow rod 16 communicates with the interior thereof through the openings

40. The number of apertures 40 is equal to the number of threaded segments 38, and each threaded segment 38 is positioned at an aperture 40. Each of the threaded segments 38 has a plurality of threads 42 on its face facing outside in a direction radial to the axis A. These threads are adapted to cooperate with the threads of the tapped hole in the load to be lifted. The threaded segments 38 have a generally rectangular shape (corresponding to the opening 40) and the external face which carries the threads has a curvature adapted to the diameter of the thread of the threaded hole of the load. The threaded segments 38 are radially adjustable through the apertures 40 between a locking position in which the threads 42 of each threaded segment 38 projects outwardly from the rod 16 in a direction radial with respect to the axis A (Fig. .4A), and an installation position in which each threaded segment 38 is retracted/retracted into the hollow rod 16 (Fig.4B). When the threaded segments are in the locking position, the rod 16 has a thread interrupted on its circumference, which can thus cooperate with the thread of the tapped hole of the load to be lifted, so that the fixing member is fixed in the load to be lifted. The engagement of the threaded segments 38 on the threads of the tapped hole makes it possible to carry the load. When the threaded segments 38 are retracted into the installation position, they do not protrude through the openings 40. In other words, the Threaded segments 38 do not protrude from the outer surface of stem 16 when in the installed position. In this configuration, an axial movement between the rod 16, and therefore the fixing member 14, and the threaded hole of the load to be lifted is possible, which allows rapid insertion or removal of the fixing member 14 from the tapped hole, therefore without screwing/unscrewing. The internal structure of the fastener 14 is visible in the sectional views of Fig4. The hollow rod 16 forms a passage 16.1 for an actuating rod 44 mounted coaxial with the axis A and movable along the latter between a locking position and an installation position. The actuating rod 44 is rigidly connected (typically by screwing) to a push button 46 having an upper face 46.1 projecting, at least when the actuating rod 44 is in its installation position, through a bore 50 of the shouldered head 18 of the hollow rod 16, and a lower face 46.2 opposite the upper face.

The internal passage 16.1 has an upper section 16.2 accommodating the push button 46 and a lower section 16.3 accommodating the actuating rod 44. The diameter of the upper section 16.2 is generally greater than the diameter of the lower section 16.3, so that the rod hollow 16 has an internal shoulder 48. When the push button 46 is depressed, its lower face 46.2 comes into abutment on the internal shoulder 48. In other words, the internal shoulder 48 represents an abutment limiting the axial movement of the button push button 46. The reference sign 50 indicates a spring threaded onto the lower part of the push button and surrounding the upper part of the actuating rod 44. The spring 50 rests on one side on a shoulder 46.3 surrounding the push button 46 and on the other on the internal shoulder 48 (Fig.4A and Fig.4B). The length and the return force of the spring 50 are chosen, as will be understood by those skilled in the art, so that when the spring 50 is at rest (ie. no force F is applied to the spring 50 by the through the push button 46), the threaded segments 42 are in the locking position.

This is the configuration of Figure 1: the actuating rod is in its first position, the default position, which corresponds to the locking position of the threaded segments 38. The threaded segments, when they are engaged in an orifice threaded with a load, allow the load to be carried.

Actuator rod 44 includes structure 54 for actuating threaded segments 38 into at least one of their positions, preferably into their locking position.

The structure 54 is positioned at the end of the actuating rod opposite the end connected to the push button 46. Each threaded segment 38 also has a recess 56 on its face opposite the face carrying the thread 42. The structure 54 to actuate the threaded segments 38 has a geometry complementary to that of the recesses 56, so that in the installation position of the fixing member 14, the structure 54 is housed in the threaded segments 38 at the level of the recesses 56.

Each recess 56 is positioned between two contact sections 58, 60 and the actuating rod 44 includes a first annular projection 62 pressing on a first contact section 58 of a threaded segment 38, spaced along the length of the rod by actuation of a second annular projection 64 bearing on a second contact section 60 of the threaded segment 38, when the threaded segment 38 is in its locking position. According to the embodiment of Fig.4, the first annular projection 62 and the structure 54 for actuating the threaded segments 38 consist of a single piece. In other words, the annular projection 62 presses on the first contact section 58 when the threaded segment is in the locking position (Fig.4A), and lodges in the recess 56 when the threaded segment 38 is in the locked position. installation (Fig.4B).

In this locked configuration, the threaded segments 38, kept projecting by the actuating rod, are retained in the openings by internal edges 39 arranged on two opposite sides of the insert, here along the axis A.

When a force F is applied to the push button 46, the push button sinks into the hollow rod 16, pushing down the actuating rod

44. The two radial projections 62, 64 of the actuating structure 54 no longer exert pressure on the contact sections 58, 60 and the threaded segments 38 retract, coming to adapt by their respective recess on your annular projection 62 (Fig.4B). The actuating rod is in the second position which corresponds to the installation position of the threaded segments. This second position is defined by the annular stop 48.

In the absence of force F exerted on the push button 46, the return force of the spring 50 causes the push button 46 and therefore the actuating rod 44 to go up along the axis A, to find the configuration of FIG. .4A. The threaded segments 38 project through the openings 40 of the locking portion 36 of the fixing member 14 (Fig.4A). The fixing member cannot be detached from the load to be lifted in the absence of action on the push button 46, increasing the safety of use of this lifting point 10. The transition between the recess 56 and the first contact section 58 on the one hand, and between the recess 56 and the second contact section 60 on the other hand, is made in the form of an oblique (conical) surface 66, 66'. The first annular projection 62 has a geometry comprising oblique surfaces 68, 68' complementary to the oblique surfaces 66, 66'. The complementarity of the oblique surfaces allows fluid movement of the threaded segment 38 between its locking position and its installation position, and vice versa.

The end of the actuating rod 44 opposite the end connected to the push button 46 also has an annular bead 70 designed to come into abutment on the lower portion (in view along the axis A) of the threaded segment 38 , precisely the lower edge 39, when the threaded segment is in its locking position, thus limiting the axial displacement of the actuating rod 44 in the hollow rod 16 of the fixing member 14. Advantageously, the push button 46 can be of different colors, the colors possibly being characteristic, for example, of the length of the threaded segments 38, of the pitch of the thread 42 of the threaded segments 38, or else of the length or the rigidity of the spring 50.

The following materials can be used to form the various elements of the fastener. The push button 46 can be made of aluminum, for example anodized aluminum. The threaded segments may be structurally hardened stainless steel, while the remainder of the locking portion 36 may be structurally hardened stainless steel or heat treated tempered steel. The smooth, hollow upper portion of stem 16, located between head 18 and locking portion 36, may be stainless steel. These various materials are given by way of non-limiting examples, those skilled in the art know how to adapt them according to the technical characteristics desired for the fixing member.

Although the invention has been illustrated and described in detail in the drawings and description above, such illustrations and descriptions should be considered illustrative and not restrictive; the invention is not limited to the embodiments described here.

Claims (16)

Claims 1. Lifting point (10) for lifting loads comprising: a pivoting body (12) with which is associated an attachment means capable of cooperating with a lifting accessory; and a fixing member (14) for fixing the lifting point (10) to the load, the fixing member (14) and the pivoting body (12) being assembled by a pivot connection allowing relative pivoting of the body (12 ) relative to the fixing member (14) along an axis (A); wherein the fastener (14) comprises a stem (16) extending along the axis (A) having a head portion (18) at one end and a latch portion (36) disposed at the other end intended to be engaged in a threaded orifice of a load, the locking portion (36) comprising at least one threaded segment (38) retractable through a side opening (40) in the rod (16), the threaded segment (38) being adjustable radially with respect to the axis (A) between a locking position in which a thread (42) of the threaded segment (38) protrudes outside the rod (16) and a position installation wherein the threaded segment (38) is retracted into the stem (16). 2. Pivoting lifting point (10) according to claim 1, wherein the rod (16) is a hollow rod having an internal passage (16.1) opening on the side of the head portion (18); and an actuating rod (44) is housed in the hollow rod (16) so as to be axially movable between a first and second position, the rod (16) having an actuating structure (54) capable of cooperating with at at least one threaded segment (38) in order to bring it into at least one of its positions, and a push button (46) connected to the actuating rod (44), at the end opposite to the actuating structure ( 54), the button (46) being accessible from the head portion (18) of the rod (16). 3. Lifting point (10) according to claim 2, in which the fixing member (14) is arranged so that by default, without application of an actuating force, the actuating rod (44) is located in the first position which maintains the at least one threaded segment (38) in its locking position. 4. A lifting point (10) according to claim 2, wherein the application of a force on the actuating rod (44) towards the locking portion (36) moves the actuating rod (44) in the second position in which the threaded segment (38) retracts into the installation position. 5. Lifting point (10) according to any one of the preceding claims, wherein the hollow rod (16) of the fixing member (14) comprises an internal shoulder (48) forming an axial stop for the push button ( 46) and defining the second position. 6. Lifting point (10) according to any one of the preceding claims, wherein the at least one threaded segment (38) has, on a face opposite the thread (42), at least one recess (56) and at at least one contact section (58, 60) adjacent to the at least one recess (56). 7. Lifting point (10) according to claim 6, wherein the actuating structure (54) has at least one annular projection (62) bearing on the contact section (58) of the threaded segment (38) when it is in the locked position. 8. Lifting point (10) according to claim 7, wherein the annular projection (62) has a geometry complementary to a geometry of the recess (56). 9. Lifting point (10) according to any one of the preceding claims, in which the hollow rod (16) of the fixing member (14) passes through a bore of the pivoting body, thus defining the relative pivot axis ( HAS). 10. A lifting point (10) according to any preceding claim, wherein the locking portion (36) of the fixing member (14) comprises three threaded segments (38) mounted in side openings (40) respectively, distributed circumferentially, the threaded segments (38) being operable by means of the actuating rod (44). 11. A lifting point (10) according to any one of claims 1 to 10, wherein the locking portion (36) of the fixing member (14) comprises n threaded segments (38) mounted in side openings ( 40) respectively, distributed circumferentially, the threaded segments carrying portions of threads offset by 1/n thread pitch. 12. A lifting point (10) according to any preceding claim, wherein the attachment means is a shackle (20) hinged to the pivoting body (12) or a loop formed integral with the pivoting body. 13. Lifting point (10) according to claim 12, wherein the shackle (20) is articulated on the body (12) so as to pivot about an axis (B) substantially perpendicular to the axis (A) and crossing the fixing member (14). 14. Lifting point (10) according to any one of the preceding claims, in which the attachment means has pins (26, 26") extending along the axis (B) substantially perpendicular to the axis ( A) engaging in respective cavities (28, 28") of the pivoting body (12). 15. Lifting point (10) according to any one of claims 1 to 13, wherein the pivoting body (12) has pins (126) extending along the axis (B) substantially perpendicular to the axis ( A) engaging in ears (128) of the attachment means. 16. Lifting point (10) according to any one of the preceding claims, in which the pivoting body (12) is assembled by means of a sleeve (32) with flange (34) pressed, shrunk or screwed onto the member. fixing (14).