Fork of a lashing device, in particular a tensioning screw for lashing containers on board container ships, as well as bolt and lashing device

Abstract

Fork (11) of a lashing device, in particular a tensioning screw (10) for lashing containers on board container ships, with a U-shaped mouth (14) and a bolt (15) which, in the working position, closes the mouth (14) at its open end, characterized in that the bolt (15) has at least two seating surfaces (18, 19).

Description

[0001] The present invention relates to a fork of a lashing device, in particular a turnbuckle for securing containers on board container ships, with a U-shaped jaw and a bolt which, in the working position, closes the jaw at its open end. The invention further relates to a bolt for such a fork and to a lashing device, in particular a turnbuckle, with such a fork.

[0002] Containers are transported on board container ships either stacked on top of each other in cell racks in the ship's hull (below deck) or stacked on the hatch covers on deck. The present invention relates to the latter case of transport on deck. In this case, the bottommost container is secured to a container base on the hatch cover using so-called bottom locking elements. The containers stacked above are secured to this base and to each other using twistlocks and, if necessary, midlocks at their container corners. Additionally, containers in the lower layers are lashed to the ship's deck using lashing bars and turnbuckles.

[0003] Currently, containers on ships are predominantly secured with internal lashing, although external lashing would be more advantageous due to the more favorable force distribution. Internal lashing means that two lashing units, consisting of a turnbuckle and one or two parallel lashing bars, run diagonally downwards from an upper corner of the container in front of the same container. The two lashing units belonging to the same container thus run inwards from the container's perspective and cross over in front of it. With external lashing, the lashing units run diagonally outwards downwards in front of each adjacent container. The lashing units of two containers stacked one container apart thus cross over in front of the container stacked between them. An example of external lashing is shown in EP 3 612 442 A1.

[0004] Especially with external lashing, the problem arises that the two lashing units, specifically their lashing bars, of two immediately adjacent containers may cross just below the hook fittings, depending on the difference in stack height between the two adjacent container stacks. This can lead to collisions of the lashing bars. This, in turn, means that under certain circumstances at least one of the lashing bars cannot be attached. German patent applications DE 100 04 359 A1 and DE 10 2013 103 951A1 address this issue.

[0005] In certain cases, the lashing units, specifically their clamping screws, cross over each other, but also near the lashing plate or the D-ring to which they are attached, making it difficult or impossible to attach the respective clamping screw.

[0006] Starting from this premise, the invention addresses the problem of further developing a fork for a lashing device, a bolt for such a fork and a lashing device with such a fork in such a way that the lashing devices can be easily attached even with external lashing.

[0007] To solve this problem, the fork according to the invention is characterized in that the bolt has at least two seating surfaces. The bolt for such a fork is accordingly characterized by at least two seating surfaces. The lashing device according to the invention has such a fork.

[0008] The two seating surfaces allow the forks of two intersecting clamping screws to be attached to the lashing plate or D-ring in different positions, and thus at different distances from the container ends. This eliminates the risk of collisions.

[0009] As an alternative to at least two seating surfaces, only one seating surface can be provided, which is then offset along the length of the bolt. Here, the position of the seating surface relative to the jaw, and thus the position of the fork relative to the locking plate or D-ring, can be changed by simply rotating the fork or inserting the bolt from the other side of the fork.

[0010] In principle, the bolt can have any number of seating surfaces, but this makes it long and consequently the associated fork wide, making it difficult to handle. The limit is likely three or four, or a maximum of five, seating surfaces. In practice, however, two seating surfaces will be sufficient to adequately prevent collisions and are therefore particularly preferred.

[0011] The seating surfaces are designed in a simple, tapered manner. Additionally or alternatively, immediately adjacent seating surfaces can be separated from each other in a similarly simple way by a thickening.

[0012] It is particularly advantageous if the diameter of the thickening or the area between two adjacent tapered sections is smaller than the diameter of the bore in the lashing plate or the D-ring. This allows a stevedore to move the fork, and thus the clamping screw, from one seat surface to the other without having to loosen the bolt from the jaw.

[0013] The length of the seat surface(s), viewed along the longitudinal axis of the bolt, should correspond to the width of a mounting plate. This ensures the seat surface always sits optimally against the mounting plate or D-ring, guaranteeing good and even force distribution.

[0014] The invention is explained in more detail below with reference to an embodiment illustrated in the drawing. The drawing shows: Fig. 1: a lower section of a lashing device, namely a clamping screw with a fork having the features of the invention in a top view.

[0015] Fig. Figure 1 shows a lower section of a lashing device, namely a tensioning screw 10 with a fork 11. The fork 11 serves to attach the tensioning screw 10 to a lashing plate 12, which in turn is welded to the ship's deck or a hatch cover at 13, or to a D-ring.

[0016] The fork 11 has a U-shaped jaw 14 and a bolt 15 which closes the jaw 14 in the working position in a known manner and thus secures the clamping screw 10 to the lashing plate 12 or the D-ring.

[0017] The bolt 15 is designed as a locking pin and has a head 16 at one end, which, in the working position shown, rests against the outside of the jaw 14. A locking device 17 is provided at its other end, securing the bolt 15 from the opposite side of the jaw 14. The bolt 15 is thus secured against falling out of the jaw 14.

[0018] Alternatively, the bolt 15 can also be designed as a screw bolt, which has a thread at its end facing away from the head 16, which interacts with a complementary thread on the jaw 14 and thus secures the bolt 15 against falling out.

[0019] In the illustrated embodiment, the bolt 15 has two seating surfaces 18 and 19. These seating surfaces 18, 19 are each formed by tapers 20 and separated from each other by a thickening 21 arranged between them. The respective length of the tapers 20, viewed along the longitudinal axis 23 of the bolt, corresponds in this case to the width of the lashing plate 12. Furthermore, the contour of the tapers 20 in this case approximately corresponds to the contour 24 of a bore 22 in the lashing plate 12, so that good, flat contact of the respective seating surfaces 18, 19 with the inner contour of the bore 22 and thus good force transmission is ensured.

[0020] Depending on the circumstances, a stevedore can now select one seat surface 18 or the other seat surface 19, thus ensuring a collision-free engagement of the clamping screw 10. It is particularly advantageous if, as shown in the present embodiment, the diameter of the thickening 21 is smaller than the diameter of the bore 22. This allows the stevedore to move the fork 11, and thus the clamping screw 10, from one seat surface 18 to the other seat surface 19 and vice versa, without having to loosen the bolt 15 from the jaw 14. Reference symbol list: 10 clamping screws 11 Fork 12 lashing plate 13 Welding area 14 mouth 15 bolts 16 heads 17 fuse 18 seats 19 seats 20 Rejuvenation 21 Thickening 22 bore 23 Bolt longitudinal axis 24 contour QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 3 612 442 A1

[0003] DE 100 04 359

[0004] DE 10 2013 103 951A1

[0004]

Claims

[1] Fork (11) of a lashing device, in particular a tensioning screw (10) for lashing containers on board container ships, with a U-shaped jaw (14) and a bolt (15) which, in the working position, closes the jaw (14) at its open end, characterized by that the bolt (15) has at least two seating surfaces (18, 19). [2] Fork (11) according to claim 1, characterized by , that the bolt (15) has two seating surfaces (18, 19). [3] Fork (11) according to claim 1 or 2, characterized by , that each seat surface (18, 19) is formed by a taper (20). [4] Fork (11) according to any one of claims 1 to 3, characterized by , that immediately adjacent seating surfaces (18, 19) are separated from each other by a thickening (21). [5] Fork (11) according to any one of claims 1 to 4, characterized by, that the area between two adjacent tapers (18, 19) or the thickening (20) has a smaller diameter than a bore (22) in a tab plate (12) or a D-ring. [6] Fork (11) of a lashing device, in particular a tensioning screw (10) for lashing containers on board container ships, with a U-shaped jaw (14) and a bolt (15) which, in the working position, closes the jaw (14) at its open end, characterized by that the bolt has a seat surface which, viewed along the length of the bolt, is offset towards one end. [7] Fork (11) according to any one of claims 1 to 6, characterized by , that the length of the seat surface(s) (18, 19) seen in the longitudinal axis of the bolt (23) corresponds to the width of a lashing plate (13). [8] Bolt (15) for a fork (11) according to one of claims 1 to 7, characterized by at least two seats (18, 19). [9] Bolt for a fork (11) according to any one of claims 1 to 7, characterized by that the bolt has a seat surface which, viewed along the length of the bolt, is offset towards one end. [10] Lashing device, in particular clamping screw (10), characterized by a fork (11) according to any one of claims 1 to 7.

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