Clamping screw, lashing harness comprising the clamping screw, and lashing-harness set comprising the clamping screw

Abstract

The invention relates to a clamping screw for a lashing harness (104), for example for securing the load on cargo ships, in particular for securing containers (100) on container ships, wherein the clamping screw (10) is length-adjustable with regard to its clamping length (L) between a minimum clamping length (Lmin) and a maximum clamping length (Lmax), is capable of transmitting tensile forces in an axial direction (A) of the clamping screw (10), and comprises a clamping-screw body (11) and a first tensile element (12) which is coupled to the clamping-screw body (11) for transmitting tensile forces in the axial direction (A) and is movable in the axial direction (A) relative to the clamping-screw body (11), wherein the at least one first tensile element (12) has a receiving chamber (13) which is designed and configured to receive at least one overlap portion (14) of a further tensile element (15).

Description

[0001] Description

[0002] Turning screw, lashing harness with the turning screw and lashing harness set with the turning screw

[0003] The invention relates to a tensioning screw according to the preamble of claim 1. It also relates to a lashing harness comprising the tensioning screw. Furthermore, the invention relates to a lashing harness set comprising the tensioning screw.

[0004] Turnbuckles for load securing must be adjustable in length so that, on the one hand, the necessary tightening force can be generated in the event of distortion, and on the other hand, so that as many attachment points as possible, with varying heights, can be covered by a single combination of turnbuckle and lashing rod. For example, a large number of containers of different heights are stacked on container ships. Such container heights vary, for example, between 8'6" (8 ft 6 in) and 9'6" (9 ft 6 in). When such containers are stacked in different sequences, a large number of different lashing lengths can arise, which are usually bridged with a lashing rod and a turnbuckle. In unfavorable constellations, particularly long lashing lengths can occur. This occurs, for example, when a large number of containers with a greater container height are stacked.Particularly short lashing lengths occur when, for example, a number of relatively short containers are stacked on top of one another. In the latter case, it may be necessary to use a shortened lashing rod because the threaded end of the turnbuckle's threaded spindle could collide with a free end of the lashing rod attached to the turnbuckle body. This may result in the required tensioning force no longer being able to be applied. To ensure that lashing can still be carried out correctly, either a shortened or extended lashing rod must be used, or turnbuckles of different designs must be available. A turnbuckle of this type is known from DE 20 2009 014 301 Ul. Such a turnbuckle has a turnbuckle body that has a spindle feedthrough for a screw spindle at one end.At the other end, the tension screw body is designed and constructed to engage with a free end of a lashing rod and its thickened portions / knobs. A locking piece is inserted into the free end of the threaded spindle, which faces the retaining piece of the tension screw body for the lashing rod, which can be used to prevent the screw spindle from accidentally rotating relative to the tension screw body.

[0005] Such clamping screws have proven their worth. However, it is desirable, especially for geometrically unchanged or predefined clamping screw bodies, to realize an expanded range of possible clamping lengths L between a minimum clamping length Lmin and a maximum clamping length Lmax.

[0006] The object of the invention is therefore to provide a tensioning screw with which the above-described disadvantages of the prior art can be avoided or reduced. In particular, a tensioning screw is to be provided which has a larger adjustment range and / or clamping range than the prior art, in particular a larger adjustment range and / or clamping range for a specific tensioning screw body length. Furthermore, a tensioning screw is to be provided in which, with regard to handling of the tensioning screw for the purpose of load securing, the simple handling known from the prior art is retained as far as possible.

[0007] With regard to a lashing harness, the object of the invention is to provide a lashing harness which has an increased adjustment range and thus a larger height difference range can be bridged in the case of different container stacks with containers of different container heights.

[0008] With regard to the lashing harness set, the object of the invention is to provide a lashing harness set that is as cost-effective and easy to handle as possible. In particular, the storage and handling of different lashing rod lengths to bridge different span lengths should be avoided.

[0009] According to the invention, the object is achieved with regard to the tensioning screw by a tensioning screw for a lashing harness, for example for securing loads on cargo ships, in particular for securing containers on container ships, wherein the tensioning screw is adjustable in length with regard to its tensioning length L between a minimum tensioning length Lmin and a maximum tensioning length Lmax and is designed to be capable of transmitting tensile forces along an axial direction A of the tensioning screw, and comprises a tensioning screw body and at least one first tensioning element which is coupled to the tensioning screw body for transmitting tensile forces in the axial direction A and is arranged so as to be displaceable in the axial direction A relative to the tensioning screw body, wherein the at least one first tensioning element has a receiving space which is designed and constructed to receive at least one overlapping section of a further tensioning element.

[0010] With a tensioning screw according to the invention, it is particularly possible for a free end of a further tensioning element to penetrate at least a little into the cavity of the first tensioning element formed by the receiving space, so that, particularly with short tensioning lengths, an overlap between the first tensioning element and the further tensioning element occurs by an amount of AL, thus avoiding a collision between the free ends of the tensioning elements. It is thus possible to increase the adjustment range of the tensioning screw for a specific tensioning screw body length by the possibility of the free ends of the tensioning elements engaging one another. The invention therefore makes it particularly simple to cover an increased tensioning length range, even though only one tensioning screw according to the invention of a specific size needs to be combined with a lashing rod of a predetermined length.This eliminates the need to stock various lashing rod lengths and / or different turnbuckle sizes, especially different turnbuckle body sizes, on a ship. Furthermore, the invention contributes to reducing the effort required for securing, as the employee responsible for securing can bridge all possible tensioning lengths with one and the same combination of a lashing rod and a turnbuckle.

[0011] Furthermore, from a shipowner's perspective, the logistical effort involved in planning and loading ships is reduced. In particular, when planning and loading ships, it is no longer necessary to consider whether staggering containers of unequal height might result in unfavorable stacking heights that may no longer be achievable with the ship's existing lashing gear, and thus may no longer be secure.

[0012] As a result, the flexibility and simplification of load securing with regard to the different container heights have been significantly improved.

[0013] In one embodiment, the first tension member is a first externally threaded spindle which is coupled directly to the clamping screw body in the axial direction A via a corresponding internal thread in a manner capable of transmitting tensile force, or is coupled to the clamping screw body in a manner capable of transmitting tensile force with the interposition of a first spindle nut.

[0014] The first alternative of this embodiment is particularly simple in construction, as the first tension element can be screwed directly into an internal thread at a first end of the clamping screw body. Additional components that provide a suitable internal thread are not required.

[0015] The second alternative of this embodiment provides a first spindle nut, which provides the internal thread for the first external thread spindle. Although such a spindle nut represents an additional component, it has the advantage that a material optimal for the tensile load of the internal thread can be selected for such a spindle nut. In addition, such a spindle nut is expediently designed to be longitudinally displaceable relative to the clamping screw body in the axial direction A, so that the first external thread spindle is decoupled from the clamping screw body in terms of compressive force. A further embodiment is characterized in that the first external thread spindle is tubular and the receiving space is an interior space of the tubular external thread spindle that is open at both ends in the axial direction A.

[0016] With a first external thread spindle configured in this way, it provides a receiving space through which another component, for example, another tension member, in particular another external thread spindle, can penetrate over its entire length. This provides the maximum possible receiving space for the second lashing member in terms of axial extension.

[0017] It may also be expedient for the receiving space to be a blind hole recess in the first external thread spindle which extends in the axial direction A and is open on one side in the axial direction A.

[0018] With this embodiment, it is possible to make conventional external thread spindles of clamping screws, which for example have a fork fitting at their free end for interaction with a lashing plate, usable for the clamping screw according to the invention.

[0019] In a further embodiment, the further tension member is a second external thread spindle which is coupled to the clamping screw body for transmitting tensile forces in the axial direction A to the clamping screw body with the first tension member interposed in series and is displaceable in a tensile force-transmitting manner both with respect to the clamping screw body and with respect to the first tension member along the axial direction A.

[0020] With this embodiment, a telescopic arrangement of the first and second externally threaded spindles can be realized, with the second externally threaded spindle being movable within the cavity of the first externally threaded spindle. With this embodiment, the increased clamping length of the clamping screw according to the invention can be realized in the region of a single free end of the clamping screw, since the two externally threaded spindles can be displaced into one another with maximum overlap. A known retaining piece for attaching lashing rods can be provided in the usual way at the other free end of the clamping screw.

[0021] An expedient further development of the clamping screw according to the invention is that the further tension member is a second external thread spindle which is coupled in the axial direction A in a manner capable of transmitting tensile force via a second corresponding internal thread directly to the clamping screw body or is coupled to the clamping screw body in a manner capable of transmitting tensile force with the interposition of a second spindle nut.

[0022] This embodiment essentially achieves the same advantages as the corresponding connection of the first external thread spindle to the clamping screw body described above. In this embodiment, too, the first alternative provides a particularly simple design, since the thread for the second external thread spindle can be accommodated directly in an end piece of the clamping screw body. The second alternative of this embodiment, as described above, provides a spindle nut, the material of which can be optimally matched to the tensile forces occurring between the second external thread spindle and the spindle nut.Furthermore, the second spindle nut can of course also be arranged displaceably with respect to the clamping screw body, which ensures a decoupling of the compressive force between the second external thread spindle and the clamping screw body in the event of a compressive force occurring on the second external thread spindle.

[0023] For a particularly simple design of the tensioning screw according to the invention, in one embodiment the tensioning screw body can have a receptacle for the direct coupling of thickenings of a lashing rod in the axial direction, ie without the interposition of further tensioning elements, capable of transmitting tensile force.

[0024] In this embodiment, the handling of a tensioning screw according to the invention, which is familiar from the prior art, can be retained. In particular, it is easily possible to suspend a lashing rod from a free end of the tensioning screw, whereas the increased tensioning length of the tensioning screw is realized at the other end of the tensioning screw body, as explained, for example, above in the context of telescopic external thread spindles. This embodiment can also be expedient for a first external thread spindle provided with a blind hole, since a free end of the lashing rod to be suspended when securing the load can be arranged in the cavity of the first external thread spindle, thus achieving an overlap length AL between the then suspended lashing rod and the first external thread spindle.

[0025] Furthermore, it is expedient that the receiving space of the first tension member is designed and constructed to receive at least part of the lashing rod of the lashing harness, in particular at least one of the thickened portions of the lashing rod, in particular by selecting a suitable inner diameter of the receiving space.

[0026] This design makes it possible, if necessary—that is, in certain lashing situations—to accommodate part of a lashing rod in the receiving space in a space-saving manner, without the risk of a collision between the end of the lashing rod and the first tensioning element. This type of tension screw is particularly versatile.

[0027] According to a further embodiment of the invention, in the case of an operating position of the clamping screw in which a clamping length L corresponds to a minimum clamping length Lmin, the further tension member is arranged over an axial overlap length AL with the overlap section in the receiving space of the first tension member.

[0028] The operating principle of the clamping screw according to the invention is explained in general terms using this embodiment. In this case, a receiving space is provided in a first tension member, into which at least a portion of the second tension member can penetrate and be received depending on the current clamping length. In the case of a minimum clamping length Lmin, this represents the maximum overlap length AL of an overlap section formed by the two overlapping tension members. In another operating position of the clamping screw according to the invention, the further tension member can be arranged completely outside the receiving space of the first tension member if, in the case of an operating position of the clamping screw, the clamping length L of the clamping screw is greater than the sum of the minimum clamping length Lmin and the axial overlap length AL.

[0029] Such an arrangement is particularly found in designs with non-telescopically arranged tension members. This design is useful for tension members mounted at opposite ends of the clamping screw body, since in a sufficiently extended, particularly maximally extended, operating position of the clamping screw, a situation can arise in which no overlap area is present. However, due to the provision of the hollow space, such an overlap area can be easily restored in the event of a changing clamping situation.

[0030] It may be useful for the additional tension member to have coupling means for coupling one or more lashing rods at its free end pointing away from the tensioning screw body.

[0031] In this embodiment, a lashing element can be coupled, in particular, to the free ends of the tension screw body, whereby one of the tension elements can interact with a lashing rod, for example, to transmit tensile force. Particularly when multiple coupling elements are provided, it is possible to easily design a tension screw to be coupled to more than one lashing rod.

[0032] In order to couple several lashing rods to a tensioning element of the tensioning screw according to the invention, it may be expedient for the coupling means to comprise a rocker bar.

[0033] To facilitate operation of the clamping screw according to the invention, it may be expedient for the clamping screw body and the first tension member to be blockable with respect to rotation relative to one another about a longitudinal axis LA by means of a blocking device, wherein the blocking device is formed in particular by at least one blocking projection projecting radially from the first tension member and at least one corresponding blocking recess provided on the clamping screw body.

[0034] By providing such a blocking device, in particular in the embodiment of the clamping screw according to the invention in which a telescopic arrangement of the first pulling element and the second pulling element, in particular the first external thread spindle and the second external thread spindle, is provided, a defined rotational blockage can be produced between the first pulling element, for example the first external thread spindle, and the clamping screw body, so that the second pulling element, for example the second external thread spindle, can be rotated in a targeted manner relative to the first pulling element, for example to the first external thread spindle, and thus a displacement of these pulling elements relative to one another can be achieved.

[0035] In order to save installation space, it may be useful for the clamping screw body to have a smaller radial extension at one of its ends than at the other end.

[0036] The above-mentioned different radial extension at the ends of the clamping screw body can be achieved in that the clamping screw body is formed from longitudinal rods and holding pieces, wherein the longitudinal rods run conically towards one another from one holding piece to the other holding piece or the longitudinal rods have at least one step along their course.

[0037] With regard to the lashing harness, the corresponding task is solved with a lashing harness with at least one tensioning screw according to the invention and a lashing member.

[0038] Preferably, the lashing device is a lashing bar, a lashing chain, or a lashing strap. With regard to the lashing harness set, the corresponding object is achieved with a lashing harness set comprising at least one tensioning screw according to the invention and a plurality of lashing devices, wherein all lashing devices are of the same length.

[0039] The invention is explained in more detail below using the drawings as examples. They show:

[0040] Figure 1a, 1b: A plan view of a first embodiment of the clamping screw according to the invention in an operating position with minimum clamping length Lmin (Figure 1a) and in an operating position with maximum clamping length Lmax (Figure 1b).

[0041] Figure 2a, 2b: A plan view of a second embodiment of the clamping screw according to the invention in an operating position with minimum clamping length Lmin (Figure 2a) and in an operating position with maximum clamping length Lmax (Figure 2b).

[0042] Figure 3a, 3b: A plan view of a third embodiment of the clamping screw according to the invention in an operating position with minimum clamping length Lmin (Figure 3a) and in an operating position with maximum clamping length Lmax (Figure 3b).

[0043] Figure 4a, 4b: A plan view of a fourth embodiment of the clamping screw according to the invention in an operating position with minimum clamping length Lmin (Figure 4a) and in an operating position with maximum clamping length Lmax (Figure 4b).

[0044] Figures 5a and 5b: A top view of a fifth embodiment of the tensioning screw according to the invention in an operating position with a minimum tensioning length Lmin (Figure 5a) and in an operating position with a maximum tensioning length Lmax (Figure 5b). Figure 6: A schematic overview of possible load securing situations that occur in practice between the corner fittings of a container and a lashing bridge of a container ship.

[0045] Figure 6 provides an overview of a variety of load securing situations occurring in practice, using the example of external lashing of stacked containers 100 to lashing plates 102 of a lashing frame 101 attached to a container ship (not shown). The containers 100 have different container heights, so that when stacking containers 100 of different heights, a variety of different span lengths SL occur between a ship-mounted lashing plate 102 and corner fittings 103 on containers 100. In the example shown in Figure 6, the span lengths SL vary over a wide range depending on the stacking situation, for example, between 3150 and 4028 length units. In order to be able to bridge such widely spread span lengths SL by means of lashing harnesses 104, it may be necessary to have lashing rods 106 with different lengths available to form the lashing harnesses 104 when using conventional tensioning screws 105.

[0046] In the following, a clamping screw 10 according to the invention is described in a first embodiment with reference to Figures 1a, 1b.

[0047] The clamping screw 10 has a clamping screw body 11, which extends with its longitudinal extent LE parallel to tensile load directions ZI, Z2. The clamping screw body 11 typically has two or more longitudinal rods 50. A first holding piece 11.3 is arranged in the region of a first end 11.1 and is connected to the longitudinal rods 50. A second holding piece 11.4 is arranged in the region of a second end 11.2 and is also connected to the longitudinal rods 50.

[0048] The first holding piece 11.3 has a through opening 11.5 in which a first tension member 12 is seated so as to be axially displaceable in the direction of the longitudinal extent LE. In the embodiment according to Figures 1a, 1b, the first tension member 12 is designed as a first externally threaded spindle 16, which carries a fork fitting 51 at its free end for attachment to, for example, a lashing plate 102. The first externally threaded spindle 16 cooperates with a spindle nut 17. The spindle nut 17 is designed, for example, as a sliding nut, which is displaceable along the longitudinal extent LE and is designed to be rotationally fixed relative to the clamping screw body 11 in a double-arrow direction 52 about a central longitudinal axis M. The spindle nut 17 is supported in the tensile load direction ZI on the first holding piece 11.3, which acts as an axial stop.Thus, a tensile force acting in the tensile load direction ZI can be transmitted from the fork fitting 51 via the first tension member 12, via the spindle nut 17 and the first holding piece 11.3 to the clamping screw body 11. By rotating the first tension member 12 in the double arrow direction 52 relative to the clamping screw body 11, its axial position relative to the clamping screw body 11 can be changed. The first lashing member 12 has a cavity 13 which is open at one end pointing towards the second end 11.2. In the embodiment according to Figures 1a, 1b, the cavity 13 is designed as a blind hole recess 13b, so that the first tension member 12 is designed in the manner of a hollow spindle screw open on one side. As will be explained further below, the hollow space 13 is dimensioned with regard to its cross-section such that the second tension member 15, which in the embodiment according to Figures 1a, 1b is designed as a lashing rod 106, has a free end 15.1 can be immersed in the cavity 13 over an overlap length AL when the clamping screw 10 according to the invention is, for example, in a minimum clamping length Lmin.

[0049] In the embodiment according to Figures 1a and 1b, the second tension member 15 is designed as a lashing bar 106. The lashing bar 106 has a plurality of spaced-apart thickened portions 22, also called "knobs," along its longitudinal extent. The lashing bar 106 is placed with one of its thickened portions 22 against a shoulder 23 of a hooking recess 24.

[0050] In the operating position shown in Figure 1a in the tensioning screw 10 according to the invention according to the first embodiment, this is in an operating position with a minimum tensioning length Lmin. In this operating position, the lashing rod 106, i.e. the second tension member 15, is arranged with the free end 15.1 in the interior 13.1. The first tension member 12 and the second tension member 15 overlap along an overlap length AL and form an overlap region 14. The second tension member 15, for example the lashing rod 106, is immersed in the first tension member 12 in the overlap region 14 over the overlap length AL.

[0051] Figure 1b shows the clamping screw 10 from Figure 1a in a second operating position with maximum clamping length Lmax. In this operating position, there is no overlap area 14. Free ends of the tension members 12, 15 do not overlap.

[0052] A further embodiment of the clamping screw 10 according to the invention is shown in Figure 2a in the operating position with minimum clamping length Lmin and in Figure 2b in the operating position with maximum clamping length Lmax.

[0053] This embodiment differs from the embodiment according to Figures 1a, 1b only within the scope of the differences described below, so that similar components will not be described again to avoid repetition. In this respect, the statements made regarding the first embodiment according to Figures 1a, 1b apply accordingly to the embodiment according to Figures 2a, 2b.

[0054] In contrast to the embodiment according to Figures 1a, 1b, the clamping screw 10 according to Figure 2a has an internal thread 25 in the second holding piece 11.4, in which a second externally threaded spindle 18 is seated as the second tension member 15. The second externally threaded spindle 18 can be displaced in the axial direction A relative to the clamping screw body 11 by rotating it about the central axis M in the direction of the double arrow 52. In this position, the free end 15.1 of the second externally threaded spindle 18 is arranged over the overlap length AL in the receiving space 13 of the first tension member 12. The second tension member 15, for example the second externally threaded spindle 18, has a receiving device 21 at its end pointing away from the second holding piece 11.4, in which the hooking recess 24 for receiving a lashing rod 106, in particular one of the thickened portions 22 of the lashing rod 106, is arranged. In this embodiment, the lashing rod 106 is not directly coupled to the tensioning screw body 11.In this embodiment, the coupling of the lashing rod 106 capable of transmitting tensile force takes place indirectly via the second external thread spindle 18 and the internal thread 25.

[0055] Figure 2b shows the embodiment of the clamping screw 10 according to the invention shown in Figure 2a in an operating position with maximum clamping length Lmax. The second tension member 15, i.e., the second externally threaded spindle 18, is fully extended and sits in the holding piece 11.4 with its free end 15.1 directly capable of transmitting tensile force. The first tension member 12 is indirectly coupled to the clamping screw body 11 via the spindle nut 17, capable of transmitting tensile force. The overlap region 14 is not present in this operating position.

[0056] A further embodiment of the tensioning screw 10 according to the invention is shown in Figures 3a, 3b. This embodiment essentially corresponds to the embodiment according to Figures 2a, 2b, so that a repeated description of corresponding details is omitted. In contrast to the embodiment according to Figures 2a, 2b, the second tension member 15, which is designed as a second externally threaded spindle 18, has, at its free end, instead of the receptacle 21 for a lashing rod 106, a rocker bar 26 pivotably mounted with respect to the externally threaded spindle 18. The rocker bar 26 is designed to accommodate two lashing rods 106.

[0057] With this embodiment, it is possible to tension two lashing rods 106 by means of a tensioning screw 10.

[0058] A further embodiment of the tensioning screw 10 according to the invention is shown in Figures 4a and 4b. In the region of the second end 11.2 of the tensioning screw body 11, this embodiment corresponds to the embodiment according to Figures 1a and 1b. A second holding piece 11.4 is provided, which is designed for coupling to a lashing rod 106, in particular its thickened portions 22, in a manner capable of transmitting tensile force.

[0059] Located in the area of ​​the first end 11.1 of the clamping screw body 11 is the first tension member 12, which engages the first holding piece 11.3 and interacts with the spindle nut 17. In this embodiment, the first tension member 12 is designed as a tubular externally threaded spindle 16. The tubular externally threaded spindle 16 is open at both of its ends pointing in the axial direction A.

[0060] Thus, an interior space 13.1 is formed which is open at both ends and serves as a receiving space 13 for the second tension member 15, which is designed as a second externally threaded spindle 18. In particular with regard to an internal diameter, the interior space 13.1, i.e. the receiving space 13, is preferably dimensioned, as in the embodiment according to Figures 1a and 1b, such that the thickened portions 22 of the lashing rod 106 can be inserted axially into the receiving space 13. As a result, when the externally threaded spindle 18, i.e. the second tension member 15, is at least partially unscrewed from the receiving space 13, space can be created to accommodate parts of the lashing rod 106.

[0061] At an end of the first tension member 12 pointing away from the first holding piece 11.3, a threaded piece 27 is firmly connected to the tension member 12. The threaded piece has an internal thread with which the second tension member 15 / the external thread spindle 18 interacts. The diameter of the external thread spindle 18 is dimensioned such that it can be accommodated in the interior 13.1 of the first external thread spindle 16. The external thread spindle 18 carries the fork fitting 51. Thus, the second external thread spindle 18 is coupled to the first external thread spindle 16 via the threaded piece 27 in a manner capable of transmitting tensile force, wherein the first external thread spindle 16 is coupled indirectly to the clamping screw body 11 via the spindle nut 17 in a manner capable of transmitting tensile force. By rotating the second external thread spindle 18 in the double arrow direction 52 around the central axis relative to the first external thread spindle 16, the second external thread spindle 18 is inserted into the interior space 13.1 of the first external thread spindle 16 is designed to be screwed in and out. Furthermore, the first external thread spindle 16 can be displaced in the axial direction A by rotating it in the direction of the double arrow 52 about the central axis M relative to the clamping screw body 11. Overall, the second external thread spindle 18 can be telescopically screwed into and unscrewed from the first external thread spindle 16. Figure 4a shows an operating position in which the clamping screw 10 is at a minimum clamping length Lmin. The first external thread spindle 16 is screwed into the clamping screw body 11. The second external thread spindle 18 is completely screwed into the first external thread spindle 16, so that the two external thread spindles 16, 18 have an overlap area 14 which has the overlap length AL.

[0062] Figure 4b shows a second operating position of the clamping screw 10, in which it has a maximum clamping length Lmax.

[0063] Furthermore, the clamping screw 10 has at least one blocking recess 30 in the region of the first holding piece 11.3, which is open towards the free end 11.1. Corresponding to the blocking recess 30, the threaded piece 27 has a radially outwardly projecting blocking projection 31, which, when engaged in the blocking recess 30 (compare the state according to Figure 4a), causes the first tension member 12 / first externally threaded spindle 16 to be blocked from rotation with respect to the clamping screw body 11. As soon as the blocking projection 31 is not engaged with the blocking recess 30, the first tension member 12 / first externally threaded spindle 16 is freely rotatable about the central axis M with respect to the spindle nut 17 and thus also with respect to the clamping screw body 11.

[0064] In the previously described embodiments according to Figures 1a, 1b to Figures 4a, 4b, the clamping screw bodies 11 have a somewhat greater radial extension in the region of the first free end 11.1 than in the region of the second end 11.2. This can be achieved in particular by the longitudinal rods 50 converging conically along the longitudinal extension LE of the clamping screw body 11 from the first end 11.1 to the second end 11.2.

[0065] A further embodiment of the clamping screw 10 according to the invention is shown in Figures 5a, 5b. This embodiment essentially corresponds to the embodiment according to Figures 4a, 4b and differs from the embodiment according to Figures 4a, 4b only in that the longitudinal rods 50 have a step 53 along their extension from the first free end 11.1 to the second free end 11.2. This step 53 in the longitudinal rods 50 enables a smaller radial extension of the clamping screw body 11 in the region of the second end 11.2 compared to the radial extension in the region of the first end 11.1.

[0066] List of reference symbols

[0067] container

[0068] Lashing frame

[0069] Lashing plate

[0070] Corner fitting

[0071] Lashing harness

[0072] State-of-the-art tensioning screw Lashing bar

[0073] clamping screw

[0074] Clamping screw body first end second end first holding piece second holding piece

[0075] Through opening first tension element receiving space

[0076] Interior

[0077] Blind hole recess

[0078] Overlap section second tension member free end

[0079] First external thread spindle

[0080] spindle nut

[0081] Second external thread spindle

[0082] internal thread

[0083] Recording

[0084] thickening

[0085] shoulder

[0086] Hooking recess

[0087] Internal thread 26 rocker beam

[0088] 27 Threaded piece

[0089] 30 Blocker recess

[0090] 31 Blocking projection

[0091] 50 longitudinal bars

[0092] 51 Fork fitting

[0093] 52 Double arrow direction

[0094] 53 level

[0095] L clamping length minimum clamping length

[0096] Lmax maximum clamping length

[0097] LE Longitudinal extension

[0098] Z1, Z2 tensile load directions

[0099] AL Overlap length

[0100] SL span length of a lashing harness

[0101] M central longitudinal axis

[0102] A axial direction

Claims

Claims 1. A tensioning screw for a lashing harness (104), for example for securing loads on cargo ships, in particular for securing containers (100) on container ships, wherein the tensioning screw (10) is adjustable in length with regard to its tensioning length (L) between a minimum tensioning length (Lmin) and a maximum tensioning length (Lmax) and is designed to transmit tensile forces along an axial direction (A) of the tensioning screw (10), and comprises a tensioning screw body (11) and at least one first tensioning element (12) which is coupled to the tensioning screw body (11) for transmitting tensile forces in the axial direction (A) and is arranged so as to be displaceable in the axial direction (A) relative to the tensioning screw body (11), characterized in that the at least one first tensioning element (12) has a receiving space (13) which is designed and constructed to receive at least one overlapping section (14) of a further tensioning element (15).

2. Clamping screw according to claim 1, characterized in that the first tension member (12) is a first externally threaded spindle (16) which is coupled in the axial direction (A) in a manner capable of transmitting tensile force via a corresponding internal thread directly to the clamping screw body (11) or is coupled in a manner capable of transmitting tensile force with the interposition of a first spindle nut (17) to the clamping screw body (11).

3. Clamping screw according to claim 2, characterized in that the first externally threaded spindle (16) is tubular and the receiving space (13) is an interior space (13.1) of the tubular externally threaded spindle (16) which is open at both ends in the axial direction (A).

4. Clamping screw according to claim 1 or 2, characterized in that the receiving space (13) has a recess extending in the axial direction (A) and in In the axial direction (A) there is a blind hole recess (13b) in the first external thread spindle (16) which is open on one side.

5. Clamping screw according to one of claims 1 to 4, characterized in that the further pulling element (15) is a second externally threaded spindle (18) which is coupled to the clamping screw body (11) for transmitting tensile forces in the axial direction (A) to the clamping screw body (11) with the serial interposition of the first pulling element (12) and is displaceable in a tensile force-transmitting manner both with respect to the clamping screw body (11) and with respect to the first pulling element (12) along the axial direction (A).

6. Clamping screw according to one of claims 1 to 4, characterized in that the further pulling element (15) is a second externally threaded spindle (18) which is coupled in the axial direction (A) in a way that is capable of transmitting tensile force via a second corresponding internal thread (19) directly to the clamping screw body (11) or is coupled in a way that is capable of transmitting tensile force with the interposition of a second spindle nut (not shown) to the clamping screw body (11).

7. Tensioning screw according to one of the preceding claims, characterized in that the tensioning screw body (11) has a receptacle (21) for the direct coupling of thickened portions (22) of a lashing rod (106) in a manner capable of transmitting tensile force in the axial direction (A), ie without the interposition of further tensioning elements.

8. Tensioning screw according to one of the preceding claims, characterized in that the receiving space (13) is arranged and designed to receive at least part of the lashing rod (106) of the lashing harness (104), in particular at least one of the thickened portions (22) of the lashing rod (106).

9. Clamping screw according to one of the preceding claims, characterized in that the further tension member (15) in the case of an operating position of the clamping screw (10) in which a clamping length (L) of a minimum clamping length (Lmin), is arranged over an axial overlap length (AL) with the overlap section (14) in the receiving space (13) of the first tension member (12).

10. Clamping screw according to one of the preceding claims, characterized in that the further tension member (15) is arranged completely outside the receiving space (13) of the first tension member (12) if, in the case of an operating position of the clamping screw (1), the clamping length (L) of the clamping screw (1) is greater than the sum of the minimum clamping length (Lmin) and the axial overlap length (AL).

11. Tensioning screw according to one of the preceding claims, characterized in that the further tensioning element (15) has, at its free end pointing away from the tensioning screw body (11), coupling means for coupling one or more lashing rods (106).

12. Clamping screw according to claim 9, characterized in that the coupling means comprise a rocker bar (26).

13. Clamping screw in one of the preceding claims, characterized in that the clamping screw body (11) and the first tension member (12) can be blocked with respect to each other with respect to a rotation about a longitudinal axis (LA) by means of a blocking device (30; 31), wherein the blocking device (30; 31) is formed in particular by at least one blocking projection (31) projecting radially from the first tension member (12) and at least one corresponding blocking recess (30) provided on the clamping screw body (11).

14. Clamping screw according to one of the preceding claims, characterized in that the clamping screw body (11) has a smaller radial extension at one of the ends (11.2) than at the other end (11.1).

15. Clamping screw according to one or more of the preceding claims, characterized in that the clamping screw body (11) is formed from longitudinal rods (50) and holding pieces (11.1; 11.3), wherein the longitudinal rods (50) conically converge from one holding piece (11.3) to the other holding piece (11.4) or the longitudinal rods (50) have at least one step (53) along their course.

16. Lashing harness with at least one tensioning screw (10) according to one of claims 1 to 15 and a lashing member.

17. Lashing harness according to claim 16, characterized in that the lashing member is a lashing bar (106), a lashing chain or a lashing strap.

18. Lashing harness set with at least one tensioning screw (10) according to one of claims 1 to 15 and a plurality of lashing elements, wherein all lashing elements are of the same length.

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