WO2016029899A1

WO2016029899A1 - Hybrid hook

Info

Publication number: WO2016029899A1
Application number: PCT/DE2015/100284
Authority: WO
Inventors: Klaus THORLÜMKE
Original assignee: Thiele Gmbh & Co. Kg
Priority date: 2014-08-28
Filing date: 2015-07-08
Publication date: 2016-03-03
Also published as: DE112015003984A5; DE112015003984B4; DE202014104023U1

Abstract

The invention relates to a load-receiving hook (1) having a hybrid design for lifting, pulling, and lashing, wherein the load-receiving hook (1) has a hook segment (23) and a supporting segment (24) and has an inner body composed of a metal material, which inner body is covered with a plastic material at least in some regions, wherein the inner body is a flat framework body (2) that is cut out from a plate, which framework body is coupled to a plastic body (4) that reaches through the framework structure.

Description

hybrid hook

The present invention relates to a load-receiving hook in hybrid construction for the lifting, pulling and lashing technique according to the features in the preamble of claim 1.

It is known from the prior art in the lifting, pulling and lashing technique to use load-bearing hooks, also referred to as load hooks or hooks. These are inserted into an eyelet or a stop means and then coupled to the load-receiving hook pulling or lashing, such as a rope or a chain, are subjected to a tensile stress and, for example, a goods to be transported on a loading area lashed and thus made a load securing become.

However, the main application of lifting hooks is in particular the lifting technique, for example, a chain, a steel cable or a rope on the load fastened hook, which can then be hung in different loads to be lifted.

Such load hooks are usually made of steel materials and are solid depending on the weight of the load to be lifted and can have up to several kg dead weight. Consequently, the handling of such a load-receiving hook is correspondingly difficult and can be carried out only with the utmost effort on the part of an installer. Such a load hook is known for example from DE 32 16 732 A or DE 400 07 22 A1.

To reduce the weight of such a load-receiving hook is known from EP 1 940 720 B1, form a support portion of a load-receiving hook as a truss-like structure. Furthermore, it is known from DE 199 54 035 C1 to produce a hook for receiving a flat fastener tape by means of laser cutting from a sheet metal blank.

In order for such prior art load-bearing hooks to be protected against metallic impacts and associated increased abrasive wear or accidental impact of a load-bearing hook against an object, it is also known from DE 2 304 145 A1, a load-carrying hook with a plastic sheath to provide.

Object of the present invention is to provide a load-receiving hook, which has a reduced weight, with high strength and associated load-bearing capacity, the load receiving hook is particularly inexpensive to produce, without significant limitation for the application to be used.

The aforementioned object is achieved with a load-receiving hook in hybrid construction for the lifting, pulling and lashing technique according to the features in claim 1.

Advantageous embodiments of the present invention are the subject of the dependent claims. The load-receiving hook according to the invention is manufactured in hybrid construction and is used in lifting, pulling and lashing technology. The load-receiving hook has a hook portion and a support portion and has an inner body of a metallic material, in particular of a steel material, wherein the inner body is at least partially sheathed with a plastic material.

According to the invention, the load-receiving hook is characterized in that the inner body is a flat inner body cut out of a board, in particular a truss body, which is coupled to a plastic body passing through the inner body, preferably the truss structure of the truss body.

Due to the inner body, a sufficient rigidity and thus load-bearing capacity is generated in the load-receiving hook according to the invention. The inner body has recesses, preferably holes, wherein the inner body is particularly preferably designed as a truss body and has a framework structure as a frame structure or skeleton structure and thus cavities or recesses are present between the individual skeleton struts or truss struts, through which the plastic body the truss body be upheld. Due to the plastic body the hook is given a three-dimensional design or a three-dimensional expression, so that optically and haptically the same properties compared to the known from the prior art solid load-bearing hook arise, but lower weight and favorable manufacturability at approximately the same load-bearing capacity.

Particularly preferably, the inner body is cut out of a sheet metal blank and formed as a flat inner body, in particular as a flat framework body. For this purpose, a sheet metal plate with a constant wall thickness is particularly preferably used. Alternatively, it is also possible to use a metal sheet with partially different wall thickness. However, the inner body is always formed in the context of the invention as a flat inner body. For this purpose, the sheet metal blank particularly preferably by laser cutting, plasma cutting or Water jet cutting be cut out. In particular, the recesses and / or the truss structure can be made individually with respect to each resulting optimal load paths.

Optionally, the flat inner body, in particular the truss body, at least partially, in particular completely tempered and / or cured. When using a hardenable steel alloy, it is possible to harden the body in particular by a thermal treatment. It would also be conceivable that the flat inner body, particularly preferably the half-timbered body, is produced by forging technology. In the context of the invention, it is particularly advantageous to post-process the produced half-timber body again mechanically, in particular to rework it by machining.

In a further processing step, the flat inner body is then coupled with recesses or the truss body with the plastic body. This is particularly preferably carried out by a spraying method, but can also be produced by a casting method or a plastic sintering method. For this purpose, the flat inner body, in particular the truss body, is particularly preferably inserted into a mold and then encapsulated with the plastic, so that, on the one hand, the plastic passes through the recesses, in particular through the truss structure, from one side of the flat inner body to the opposite side of the flat inner body is formed in one piece and material uniform. This production is particularly robust, so that even under adverse conditions always a positive contact and thus preventing a loosening of the plastic body is prevented by the flat inner body. Preferably, furthermore, the plastic can cohesively connect to the surface of the flat inner body.

The plastic body then protrudes three-dimensionally relative to the respective surface of the flat inner body and encloses the flat inner body in sections.

However, especially at load points in the region of the hook base, the hook tip at the lower attachment point of the hook and / or in the hook eye, the metallic material of the flat inner body protrudes to the surface, so that an abrasive wear occurring during operation is counteracted by the metallic surface. In particular, this is done on stress and / or wear-critical areas, so that, for example, the hook base rests directly on the material to be lifted with a metallic surface and on all other areas and / or surfaces then the plastic body form the surface, in particular form three-dimensional, so that For example, the fitter with his hand, the load pickup hook and haptic simply grab and act on the basis of the plastic body.

Further particularly preferably, the plastic body surrounds the truss body on the other stop surfaces such that a damping protective cover is provided. In case of accidental contact, for example, when the load-carrying hook bounces when in position against a container, so does not strike metal on metal, but the plastic body dampens the impact.

For this purpose, particularly preferably the truss body on the outside recesses on its peripheral edge, so that more plastic material is arranged on these outer side impact surfaces on the peripheral edge of the inner body during the coupling process with the plastic body. The plastic body overlaps, in particular with overlapping areas, the truss body in the recesses.

In an alternative embodiment variant, in particular the plastic body can be designed in shell construction, so that the plastic body as well as the flat inner body or the truss body are produced separately from each other. Subsequently, the plastic body is then arranged in particular in two parts by means of two plastic shells coming from each side to the truss body and coupled for example by a positive and / or cohesive method with this and / or the two plastic shells are coupled to each other enclosing the flat inner body. Thus, in particular, the plastic body is glued to the truss body and / or coupled by means of a riveted joint.

Furthermore, spacers are designed to protrude over a side surface of the plastic body, in particular spacers. webs, particularly preferably a spacer bar is formed on each side. As a result, in particular in case of lateral impact and / or in position bringing the load-receiving hook according to the invention through the spacer web, which is formed integrally and material uniformly with the plastic body, a damping effect unfolds and damage to the plastic body itself, for example by notching or breaking plastic parts due of the spacer, avoided. This increases the durability of the load-receiving hook according to the invention.

A preferred embodiment variant of the load-receiving hook according to the invention in hybrid construction is shown in the following schematic figures. These are for easy understanding of the invention. Show it:

1 shows a load receiving hook according to the invention in cross-sectional view,

FIG. 2 shows the truss body according to the invention in side view,

3 shows the truss body according to the invention in front view,

FIG. 4 shows the load-receiving hook in side view,

5 shows the load receiving hook in front view,

FIG. 6 shows the load-receiving hook in perspective view,

Figure 7 is a securing flap in hybrid construction and

8 shows a core plate of a security flap.

In the figures, the same reference numerals are used for the same or similar components, even if a repeated description is omitted for reasons of simplicity.

FIG. 1 shows the load-receiving hook 1 according to the invention in a cross-sectional view. It can be seen that the inner body is formed as shown in Figure 2 and Figure 3 flat truss body 2 with a constant wall thickness W. The truss body 2 itself has a truss structure with recesses 3, the recesses 3 lying in the truss structure being offset from the plastic truss structure. Body 4 are penetrated, so that the plastic body 4 opposite to both surfaces 5 of the truss body 2 projecting laterally pass through the recesses 3 and is integrally formed and material uniformly form-fitting manner to the truss body 2 to the effect. Also visible is the exemplary division into hook portion 23 and support portion 24. The support portion 24 is used for coupling, for example with a chain or a rope and the hook portion 23 is the coupling with a to be secured Good or a load to be lifted, which in the hook portion 23rd of the load-picking hook 1 is mounted.

A hook base 6 as well as the receiving lug 7 and an outer lower portion 8 are formed in particular by the preferably formed of a steel alloy truss body 2 on the outer circumferential edge 13. If now a load is suspended or a pulling or lashing means in the receiving eye 7 under load, so is in each case directly the surface 5 of the truss body 2 with an edge surface 22 for transmitting the force.

On an upper side 9, a hook tip side 10 and a rear side 1 1 recesses 12 are formed on the outer circumferential edge 13, so that in particular overlap regions 14 of the plastic body 4 come to rest on the outside, so that just here when placing or striking the hook the dampening property of the plastic body 4 prevent metal shock. Also, in the base 15 of the receiving eye 7 of the plastic body 4, a recess 12 is formed so that when discontinuing a not shown falling shackle or a chain link is damped in the receiving eye 7. Furthermore, the truss body 2 has a mounting hole 16 for a security fitting, not shown. On the hook tip 17 itself is formed by a contouring of the plastic body 4, a receiving surface 18 to which the securing means not shown in a form-fitting manner comes to rest, which is particularly well visible in Figure 6.

From FIG. 5, to the section line II of which the cross-sectional view of FIG. 1 is formed, it can be seen in particular that the plastic body 4 is each projecting laterally with respect to the surface 5 of the truss body 2 and thus has a three-dimensional contour or the external shape and / or the outer Appearance of the hook training. Furthermore, laterally protruding over the plastic body 4 spacer webs 19 are formed, which is also clearly visible in Figure 5 or 6, so that the spacer webs 19 protect the hook against lateral shocks and / or abrasive wear, and thus in particular the outer circumferential surface 20 of the plastic body 4th protect in the lateral area from further damage, such as notches by hitting sharp objects.

The truss struts 21 shown in FIG. 1 and FIG. 2 can then be dimensioned and / or positioned within the scope of the invention in such a way that, in conjunction with the selected wall thickness W and the material for the truss body 2, they meet the required load-bearing capacity. It would also be conceivable within the scope of the invention that the truss-like structure are formed by, for example, holes or other holes on a flat inner body. Thus, forces of several 1000 N can be transmitted with the load-receiving hook 1 according to the invention and / or loads of up to several 100 kg or several tons can be lifted.

Also shown in Figures 1 and 4 is the securing flap 25. The securing flap 25 itself is also preferably formed in hybrid construction, which is again clearly visible in Figures 7 and 8. The securing flap 25 thus has an inner core plate 26, which in turn is coated with a plastic jacket 27. For this purpose, in particular an opening 28 is provided in the core plate 26, so that the core plate 26 is coated with the plastic jacket 27. In the area of the receiving surface 18, a receiving opening 29 is provided, which has a plastic stop surface 30 clearly visible in Figure 7 from an upper side, so that when performing the snap movement of the securing flap 25, the plastic abutment surface 30 comes to rest on the receiving surface 18. The snap action is thus damped. Reference numerals:

1 - Load hook

2 - truss body

3- recess

4- plastic body

5- surface to 2

6 hook base

7 - eyelet

8- underside section

9- top

10- hook tip side

11 - back side

12 - recess to 13

13- edge

14- Overlap areas

15- Reason to 7

16- mounting hole

17 - Hook tip

18- receiving surface

19- spacer bar

20- outer circumferential surface to 4

21 - truss brace

22 - edge surface

23- hook section

24- carrying section

25- safety flap

26- core sheet

27 - plastic jacket

28- opening

29- receiving opening

30- plastic stop surface W wall thickness

Claims

claims

1. Load-receiving hook (1) in hybrid construction for the lifting, pulling and lashing, wherein the load receiving hook (1) has a hook portion (23) and a support portion (24) and an inner body of a metallic material having at least one plastic material is partially sheathed, characterized in that the inner body is a flat, cut out of a board half-timbered body (2) which is coupled to a truss structure, the plastic body (4).

2. load receiving hook according to claim 1, characterized in that the truss body (2) is cut out of a sheet steel plate, in particular by laser cutting, plasma cutting or water jet cutting.

3. load-carrying hook according to claim 1 or 2, characterized in that the truss body (2) has a constant wall thickness (W) or that the truss body (2) has a partially different wall thickness (W).

4. load-carrying hook according to one of claims 1 to 3, characterized in that the truss body (2) is formed of a hardenable steel alloy and at least partially, in particular completely, is cured.

5. load-carrying hook according to one of claims 1 to 4, characterized in that at load critical points and / or wear points of the truss body (2) passes through the plastic body (4) to the peripheral edge (13) passing.

6. load receiving hook according to one of the preceding claims, characterized in that on outer side abutment surfaces of the plastic body (4) with an overlap region (14) engages around the truss body (2).

7. load receiving hook according to the preceding claim, characterized in that the truss body (2) has recesses (12) on its peripheral edge (13), so that the plastic body (4) the truss body (2) on the surface of the edge (13 ) at least partially covered.

8. load-receiving hook according to one of the preceding claims, characterized in that the plastic body (4) integrally and material uniformly the truss body (2) encompassing and / or cross-trained, in particular, the plastic body (4) is made by casting or by injection or by sintering ,

9. load receiving hook according to one of claims 1 to 7, characterized in that the plastic body (4) is formed in shell construction, wherein two shells include the truss body (2) and in particular positively and / or materially coupled thereto and / or with each other.

10. load-carrying hook according to one of claims 1 to 9, characterized in that the plastic body (4) has a three-dimensional configuration, in particular transversely to a plane of the truss body (2).

11. load receiving hook according to one of claims 1 to 10, characterized in that opposite to an outer lateral surface (20) of the plastic body (4) a spacer is laterally projecting, in particular a spacer web (19), preferably on each side of a spacer web (19) arranged distantly.

12. Load-receiving hook according to one of the preceding claims, characterized in that the plastic body (4) forms the outer three-dimensional contour of the load-receiving hook (1).

13. load-carrying hook according to one of the preceding claims, characterized in that a securing flap (25) consists of a with a Plastic shell (27) coated core sheet (26) is formed in hybrid construction.