NO345612B1

NO345612B1 - Structure of a hook

Info

Publication number: NO345612B1
Application number: NO20161707A
Authority: NO
Inventors: Eldar Lien
Original assignee: Selantic As
Priority date: 2015-10-27
Filing date: 2016-10-27
Publication date: 2021-05-10
Also published as: NO20161707A1; NO20151461A1

Description

Field of the invention

The present invention relates to a twin hook assembly connecting a hoisting line, comprising a first hook member and a second hook member, each hook member comprises a holding hook tip part for a respective load line, in where the holding hook tip parts face in opposite directions.

Background of the invention

The hook structure of the invention relates in particular to a hook structure for cranes for hoisting of different kinds of cargo.

An essential object of the invention is to have the advantage of having a twin hook, where the hook angle will adjust to the sling angle, and thereby you can cope with different lifting/sling angles such as for handling container loads, without overloading the hook.

Disclosure of the state of art

As to the state of art, reference is made to the following patent documents.US-3.337.256, RU-2.097303, SE-409.495 and CA-981.426.

Reference is also made to US 4273371 A and US 1025353 A.

Objects of the present invention

Thus, it is an object for the two hooks of the assembly to operate to automatically adjust their individual position or direction as to the rotation axis of the

It is also an object to provide for preferred applications of the hook structure.

In short:

• It consists of two hooks that can have the same or different capacities.

• One is made with an eye interface in the top.

• The other is made with a Clevis interface in the top, and so that the eye hook fits into the clevis.

• Both of them are connected with the same pin, either to a shackle as shown or a plate shackle.

The hooks can also be used one by one in performing lifting and lowering (hoist) operations of load.

Summary of the invention

Said objects are achieved with a twin hook assembly connecting a hoisting line, comprising a first hook member and a second hook member, each hook member comprises a holding hook tip part for a respective load line, in where the holding hook tip parts face in opposite directions, wherein the first hook member is a double leg clevis structure with a shank portion, and the second hook member is

a single leg structure with a shank portion. The double leg clevis structure defines a cleft or recession into which the single leg structure of the second hook member is installed. The first hook member and the second hook member are resting back to back to each other and with the holding hook tip parts facing in opposite directions holding respective load lines, the double leg clevis structure of the first hook member and the single leg structure of the second hook member being individually pivotable on a common shaft, and a shackle, attached to the hoisting line, is connected to said common shaft.

The rear/back side of the second hook member can be resting on the rear back side in the cleft between the two legs of the first hook member.

The two hook members are preferable structured to define a lowest angle α of 30-45⁰ (degrees) between the two members.

The free ends of each of the first and second hook members can include a line holding part.

Further, the hook assembly can be mounted or suspended in or connection to for example a lifting line of a wire, lifting hawser of a crane for handling loads such as cargo or to operate anchoring systems at sea.

According to a first preferred aspect hook structure is used to handle load slings, such as of containers, or in offshore anchoring operations, said sling being directed in different angles from the hook members, in that the hook members individually will adjust automatic to the sling angle, and thereby one can cope with different lifting/sling angles without overloading the hook.

According to a second aspect hook structure with its the hook members and used one by one to handle and lifting or lowering load of any kind, i.e. performing offshore anchoring operations.

Description of the figures

Embodiments of the present invention will now be described, by way of example only, with reference to the following figures, wherein:

Figure 1 shows a side perspective view partly in section of the twin hook of the invention.

Figure 2 shows an oblique perspective view the twin hook seen from above.

Figure 3 shows a perspective/sectioned view similar to that of figure 1.

Figure 4 shows a perspective view of the second hook element of the invention.

Figure 5 shows a perspective view of the first hook element of the invention.

Description of preferred embodiments of the invention

By referring to figure 1 and 2, there is shown the hook assembly 40 mounted on suspending in or connection to for example a lifting line 140 (shown in general), such as a wire, lifting hawser of a crane for handling loads such as cargo or to operate anchoring systems at sea or similar uses.

In the example two separate hook structures or members 20 and 30 are mounted to rotate individually on a common axle 52 around an axis 50 in a shackle as shown by 40 in figures 1 and 2. The shackle consist normally of two parallel legs 42 and 44 to anchor the hook structures 20,30 onto the rotation axle 50. Preferably the axle 52 is rigidly connected to between the shackle legs 42, 44 while the two hook structures are enabled to rotate on the axle 50 around said axis 52.

Each hook structure comprises (in vertical) a shank or neck part 24,34 while the toe, horn or hook tips are shown at 23 and 33 respectively. The hook body is curved as well known and define line or sling 60 and 62 entrances shown at 22 and 32, representing the line, becket or strap holding parts of each hook, respectively. The curved portion between each tip 21/23 and each neck portion subtends an arc of about 180⁰ defines said line 60,62 holding part. The entrances 22, 32 of the two hooks may also be closed by a not shown latch structure.

The top interface part of a plate shape includes eye sections (bore) through which the axle extends.

The first hook member 20.

The top interface part of the first hook member 20 is also defined as a Clevis structure, in that it is composed of two separate and mainly parallel legs 36,38 in the form of plate structures 36,38 each one including its own eye section through which the shaft 52 extends. The two legs are at a fixed mutual distance from each other. In direction towards the line holding part, each leg is bent inwards and they are joined in the common shank portion 24. The first hook member may rotate on the axle 52. The free end of the first hook member forms the line holding part as disclosed above.

The second hook member 30.

The second hook member is a single leg or plate structure 37 (figures 2, 3 and 4) mounted on the axle 52 in between said two separate plate structures 38 and 38. The free end of the second hook member forms the line holding part as disclosed above mainly similar to the first hook member.

The two hooks are arranged to rotate mutually individually around the common axis 50/axle 52 between the shackle legs 42 and 44.

The two hook structures are preferably mounted so that their curved portion, i.e. the line holding hook entrances 22 and 32 are directed mutually in opposite directions.

The second hook member 20, is arranged to be anchored to the axle 52 between the legs 36,38 of the first hook structure 30. The two plate structure of the first hook member define a cleft, cleavage or recession 35 into which the anchoring or rotating part of the second hook 20 is installed.

The rear/back side 41 of the second hook member 20 rests on the rear back side 39 in the cleft 35 between the to plates 36,38 of the first hook member 20. The two line holding hook parts face in opposite directions.

This leads to the structural feature that the back or rear side 41 of second hook structure 30 with its shank/neck 34 rests or rides on the similar rear/back (i.e. the neck 24) portion of the first hook structure 20.

This structure gives some restrictions to the mutual movement or rotation properties of the two hooks 20 and 30, but one of their objects in this invention is to handle slings, for example as shown by the two slings 60 and 62 that may extend in two different angle directions. When the rear sides 41 and 39 respectively, abut against each other, a lowest angle α, of for example 30-45 ⁰ (degrees) is defined between the two members. They are not enabled to pivot closer to each other around the axis, this issue being restricted by the shape of the rear sides 41,39 of their shank portions 24,34 respectively.

Thus, as mentioned above a major advantage of this is that twin hook is now established, where the hook angle will adjust automatic to the sling angle, and thereby one can cope with different lifting/sling angles without overloading the hook. The hooks 20 and 30 can also be used one by one.

Claims

Patent claims

1. A twin hook assembly connecting a hoisting line (140), comprising a first hook member (20) and a second hook member (30), each hook member (20,30) comprises a holding hook tip part (23,33) for a respective load line (60,62), in where the holding hook tip parts (23,33) face in opposite directions, characterized in that the first hook member (20) is a double leg clevis structure (36,38) with a shank portion (24),

the second hook member (30) is a single leg structure (37) with a shank portion (34),

the double leg clevis structure (36,38) defines a cleft or recession (35) into which the single leg structure (37) of the second hook member (20) is installed, the first hook member (20) and the second hook member (30) are resting back to back to each other and with the holding hook tip parts (23,33) facing in opposite directions holding respective load lines (60,62), the double leg clevis structure (36, 38) of the first hook member (20) and the single leg structure (37) of the second hook member (30) being individually pivotable on a common shaft (52), and

a shackle (40), attached to the hoisting line (140), is connected to said common shaft (52).

2. Hook structure according to claim 1, characterized in that the rear/back side (41) of the second hook member (20) is resting on the rear back side (39) in the cleft (35) between the two legs (36,38) of the first hook member (20).

3. Hook structure according to any of the preceding claims, characterized in that the two hook members are structured to define a lowest angle α of 30-45 ⁰ (degrees) between the two members.

4. Hook structure according to any of the preceding claims, characterized in that the free ends of each of the first (20) and second (30) hook members includes a line (60,62) holding part.

5. Hook structure according to any of the preceding claims, characterized in that the hook assembly is mounted or suspended in or connection to for example a lifting line of a wire, lifting hawser (140) of a crane for handling loads such as cargo or to operate anchoring systems at sea.

6. Use of the hook structure according to claims 1 - 5, to handle load slings (60,62), such as of containers, or offshore anchoring operations, said sling being directed in different angles from the hook members (20,30), in that the hook members individually will adjust automatic to the sling angle, and thereby one can cope with different lifting/sling angles without overloading the hook.

7. Use of the hook structure according to claims 1 - 5, in that the hooks (20) and 30 are used one by one to handle and lifting or lowering load of any kind, i.e. performing offshore anchoring operations.