EP1451091A1

EP1451091A1 - Lifting belt sling

Info

Publication number: EP1451091A1
Application number: EP02782594A
Authority: EP
Inventors: Ruedi Hess
Original assignee: Mammut Tec AG
Current assignee: Mamutec AG
Priority date: 2001-12-03
Filing date: 2002-12-03
Publication date: 2004-09-01
Anticipated expiration: 2022-12-03
Also published as: US20050062303A1; DE50214938D1; US7637549B2; WO2003048023A1; EP1451091B1; ATE500185T1

Abstract

A lifting belt sling for lifting loads is comprised of a tubular structure having at least two chambers whereby forming, as one unit, a chamber tube that is contiguous over the width. Loosely inserted inserts are located inside the at least two chambers and endlessly extend from one end of the chamber tube to the other end thereof. The inserts overlap the ends of the chamber tube so that they form loops at this location, whereby the inserts, when situated in the loop area, are covered by a tube protective means. A protective tube, which surrounds the chamber tube and is formed by different weaves, significantly increases the resistance to abrasion, the resistance to cutting, and the edge strength. The lifting belt sling is designed for loads of up to 100 t.

Description

lifting belt sling

The invention relates to a sling sling according to claim 1.

Round slings are mainly used in industry, construction and trade for lifting loads. Lifting belts are used in a variety of ways in transportation and especially in the construction industry.

According to US Pat. No. 4,210,089, a round sling is known which comprises two chambers in order to obtain a higher strength and an improved abrasion and cut resistance.

According to US Pat. No. 5,238,278, a textile round sling is known, with additional ribs on the round sling hose, which are said to result in improved cut and abrasion resistance.

According to US Pat. No. 5,651,572, a round sling is known which comprises an additional strand of optical cables in order to be able to trigger a signal when broken. According to US 4,843,807, a manufacturing method for a round sling is known, which relates to an efficient production of a round sling. According to US Pat. No. 5,498,047, a lifting belt is known which consists of a woven band with loops and at least one reinforced edge which is intended to protect against premature wear. The reinforcement is an additional textile insert.

The following points are disadvantageous in the case of round slings and lifting belts: Round slings are made from a hose which normally consists of one chamber, but can also - as explained in US Pat. No. 4,210,089 - consist of two chambers. Round slings are made from endless strands of yarn, which always result in a round, endless ring or tube, but which can be designed in such a way that they can lift loads of up to 100 t. Because round loops result in an endless ring, they cannot simply be carried out under a standing load.

Lifting straps are made from woven straps that, depending on their width and thickness, can normally lift loads of up to 20 l. Lifting straps are sewn in one piece with loops on both sides. This band can be pulled through under a standing load piece and hung on both sides with the loops in a load hook. Since the belts are under high tension due to the load, they are very prone to wear and cutting. An attempt is often made to remedy this disadvantage with an elaborate coating.

It is the object of the present invention to propose a sling in which the advantages of the round sling are combined with the advantages of the sling.

Another task is to significantly increase the service life and service life of the sling compared to conventional slings sewn from belt material and to design them for loads of up to 100 t.

According to the invention, this object is achieved with a lifting belt loop according to the wording of claim 1.

The invention is explained in more detail below with reference to the drawings. Show it:

Fig. 1 view of a sling sling according to the invention

Fig. 2 is a perspective sectional view of a sling sling

Fig. 3 Perspective sectional view of a sling with loops of small width and large thickness. Fig. 4 Perspective sectional view of a sling with loops of large width and small thickness. Fig. 4A sling with symmetrical inserts

Fig. 4B sling sling with asymmetrical inserts

Fig. 5 chamber hose with coating applied on one side

Fig. 6 chamber hose with a surrounding protective hose

Fig. 7 sling with two protective tubes Fig. 8 First embodiment of a sling with loops of different lengths. Fig. 9 ^• Second embodiment of a sling with reinforced

Loop protection Fig. 10 Third embodiment of a sling with thimbles

Fig. 11 fourth embodiment of a sling with hooks and eyes

Fig. 12 Fifth embodiment of a sling with a wide / narrow woven chamber tube, protective tube and loop protection

1 shows the view of a sling sling according to the invention. The lifting belt loop consists of a hose-like structure 20 which has at least two chambers 2, 2 'and thus forms a chamber hose 1 which is delimited by ends 5, 5'. The chambers are formed in the manufacturing process and consist of synthetic yarns, woven fabrics, knitted fabrics, cast plastic, extruded synthetic material, steel mesh or chemically resistant material, leather or synthetic leather. In the at least two chambers 2, 2 'there are inserts 4 which run endlessly from one side to the other, or from one end 5 to the other end 5', through the chamber tube 1.

The inserts 4 consist of individual fibers or fiber bundles of high-strength materials such as polyester (PES), polyamide (PA), polypropylene (PP), polyethylene (PE), Dyneema, Kevlar and steel strands. They are also referred to as train inserts, since they essentially absorb the entire load, while the chamber tube 1 surrounding them remains essentially unloaded under train and, above all, has a protective function. This results in a significantly longer lifespan for the sling. The inlays or the protective tube can likewise consist of a combination of these materials, or can be present as a mixed bundle of inlay fibers.

The inserts 4 protrude or overlap the ends 5, 5 'of the chamber tube 1, so that loops 3, 3' are formed there. The inserts are covered in the loop area by a loop protection 6, 6 ', which usually overlaps the chamber tube 1 and is connected to it. But it can also abut the ends 5, 5 'of the chamber tube 1 without connection (not shown). The chamber tube can consist of different materials, with these be covered or coated. Suitable materials are synthetic and natural materials such as polyurethane, synthetic rubber, natural rubber, PVC, textiles, nonwovens, synthetic leather, leather, steel braid, yarn fabrics and knitted fabrics. The inserts 4 thus introduced into the chamber hose 1 and the inserts endlessly returned through the chamber hose form a band with endless inserts with the loops 3, 3 'formed at both ends 5, 5'. The loops can be covered by various protective materials, for example as a fabric or as a hose.

Fig. 2 shows a perspective sectional view of a sling sling. The chamber tube 1 can be seen with its one end 5 and the chambers 2, 2 ', to which four further chambers are arranged. The inlays 4 are located in the chambers. The at least two chambers 2, 2 'were created by sewing, knitting or weaving. For example, the chambers Seams that are parallel to the inserts in the pulling direction, whereby the chamber tube is divided into chambers. Such sling slings are mainly used for applications in the machine industry, in construction, for the transport and goods industries, such as is the case in all types of freight handling areas.

Fig. 3 shows a perspective sectional view of a lifting belt loop with chambers of small width and large thickness. The tension inserts 4 are arranged in the chambers 2, 2 'of the chamber hose 1 in such a way that the chambers have a small width and a large thickness.

These belts are particularly suitable for lifting large loads and are manufactured for loads up to 1001 with a safety factor of 7: 1. Such sling slings are used in turbine construction, for heavy loads in power plants or in industry in general.

Fig. 4 shows a perspective sectional view of a lifting belt loop with chambers of large width and small thickness. The tension inserts 4 are arranged in the chambers 2, 2 'of the comb hose 1 in such a way that the chambers have a large width and a small thickness. Such sling slings are mainly used when there is little space available to pull the sling slings under the load slide. The chamber hose can thus have a cross-section which is freely designed according to the application requirements with regard to thickness, width and load capacity.

4A shows a lifting belt loop with symmetrical inserts. The inserts 4 loosely inserted in the chamber tube 1 are indicated here by dashed lines. The insert 4 'in the outer chamber on one side of the chamber tube is guided over the loop 3 and then returned as an insert 4 "in the outer chamber on the other side of the chamber tube. The inserts 4' and 4" thus lie symmetrically with respect to a center line of the chamber hose. All other deposits are also arranged symmetrically with respect to this center line. This arrangement is called 'symmetrical deposits'.

If the chamber hose now has a large number of adjacent chambers, it can 'collapse' under tension, i.e. it deforms in a U-shape.

4B shows a sling with an asymmetrical insert. The inserts 4 loosely inserted in the chamber tube 1 are indicated here by dashed lines. The insert 4 'in the outer chamber of one side of the chamber tube is guided over the loop 3 and then returned as an insert 4 "in an inner chamber of the other half of the chamber tube. The inserts 4' and 4" are thus asymmetrical with respect to a center line of the chamber hose. All other deposits are also arranged asymmetrically with respect to this center line. This arrangement is known as 'asymmetrical deposits'.

If the chamber hose now has a large number of adjacent chambers, it can hardly 'collapse' under tensile stress, because a transverse component of the tensile stress counteracts the deformation due to the asymmetrical arrangement.

5 shows a chamber hose with a coating applied on one side. The chamber tube 1 with the chambers 2, 2 'and inserts 4 is provided with a coating 7 on one side.

The chamber hose can have a one-sided or a two-sided coating. However, it can also consist of a material that is woven, knitted, extruded or cast and can also be produced as an all-round coating. The Coatings can be cast, sprayed, calendered, powder coated or squeegee and cured as a solution. The chamber hose can have a coating which consists of the same materials or of different materials as the chamber hose.

Fig. 6 shows a chamber tube with a surrounding protective tube. The comb tube 1 is surrounded by a protective tube 8. There may also be several protective tubes one above the other. The protective tube can be made of synthetic or natural material, of fabric, of knitted fabric or as an extruded, cast element. The protective tube is arranged over the entire length of the chamber tube or only over part of it, or can be made from several parts. The protective hose also serves as a support surface for the work and is therefore made of different materials according to the application requirements. Depending on the application, it is particularly heat-resistant, flame-retardant, chemical-resistant, cut and abrasion-resistant. It has a woven or knitted jacket or a double jacket that is particularly resistant to chemicals and consists of polyamide (PA), polypropylene (PP), polyester (PES) or polyethylene (PE), or a blend of these materials. It is usually made from cut-resistant material that is resistant to cuts and, thanks to special weaves, has an extremely high edge strength, since the edges are not under tension. Particularly heat-resistant and flame-resistant versions are made of Kevlar, steel strands, Nomex or a combination thereof. An extremely high level of abrasion resistance, cut resistance and edge strength are achieved through various special weaves.

The chamber tube 1, the inserts 4, the coating 7, the protective tube 8 and the edge protector can have different or the same materials.

The protective tube as well as the comb tube can consist of extruded or cast synthetic material. PVC, PU, rubber or synthetic rubber, a rubber mixture, natural or synthetic leather, woven or knitted steel strands, yarn fabrics or knitted fabrics that are coated on one side, on both sides or all around are possible. According to the applicable CE standards, the comb hose, the protective hose, the protective coating, the inserts and the edge protection can have different materials.

The CE standard EN 1492-1 defines the sling with regulations which are fully complied with through the arrangement and combination of the various materials listed.

Fig. 7 shows a sling with two protective tubes. The chamber hose is here surrounded by a first protective hose 8, so that it is covered from end 5 to end 5 '. A second protective tube 8 ′ is attached over the central part of the first protective tube 8, which guarantees additional protection in this area. Thus, the comb tube can be covered with several different or identical protective tubes, which, through their position or distribution over the entire length of the chamber tube, give rise to a reinforcement profile, a protective profile that meets the desired requirements in each case.

Some exemplary embodiments are explained below.

Fig. 8 shows a first embodiment of a sling with loops of different lengths. The loops 3, 3 'are of different lengths here in order to optimally serve the respective application. For example, due to lack of space with different accessibility of the load, one loop of the sling can be longer than the other. The lifting belt loop has a comb hose 1 of 4 m and loops of different lengths of 0.8 m and 1.8 m in length, which gives a total length of 6.6 m. It is designed for a payload of 100 t. The chamber hose is divided into 14 chambers 2, 2 ', in which inserts 4 made of polyester strands are loosely inserted. The comb tube is made of polyester fabric and is covered with a protective tube 8 made of polyester fabric with coated polyurethane, which covers the entire comb tube. The two loops 3, 3 'have a loop protection 6, 6' made of polyamide fabric and are wide / narrowly woven, the narrowly woven part lying in the loop curvature. Fig. 9 shows a second embodiment of a sling with reinforced loop protection. In addition to the loop protection 6, 6 ', the loops 3, 3' are provided with a reinforcement 9, 9 'in the region of the curvature. This reinforcement consists of wide / narrow woven fabric, of extruded or cast synthetic material. The loops 3, 3 'are usually surrounded by a wide / narrow woven loop protection. The loop protection 6, 6 'consists of a synthetic or natural material, of leather, of synthetic leather, of polyurethane, PVC or nonwoven.

10 shows a third exemplary embodiment of a lifting belt loop with thimbles. Thimbles 10, 10 'are attached here in the loops 3, 3'.

11 shows a fourth exemplary embodiment of a lifting belt loop with hooks and eyes. In one loop 3 there is a hook 11 and in the other loop 3 'an eyelet 12 is attached.

Fig. 12 shows a fifth embodiment of a sling with a wide / narrow woven comb tube, protective tube and loop protection. The chamber hose is surrounded here by a protective hose which is narrow-woven at the ends 5, 5 'and the comb hose, while it is broad-woven in the middle 13. The loop protection 6, 6 'is also wide / narrowly woven, namely narrow in the middle, so that it has a small area and fits into the load hook. As a result, the lifting sling can provide broad support for the load on the load bearing surface and have a space-saving suspension in the loop area.

Claims

claims

1. lifting sling for lifting loads, characterized in that it consists of a hose-like structure (20) which has at least two chambers (2, 2 ') and thus forms a comb-connected hose (1) in width and thus forms a unit, that there are inlays (4) in the at least two chambers (2, 2 ') which run endlessly from one end (5) of the chamber tube (1) to the other end (5') of the inlays (4) protrude the ends (5, 5 ') of the chamber hose (1) so that loops (3, 3') are formed there and that the inserts (4) in the loop area are covered by a loop guard.

2. Sling belt according to claim 1, characterized in that the chamber hose (1) remains substantially unloaded under tension, since the inserts (4) are designed as tension inserts and absorb essentially the entire load, which results in a significantly longer service life.

3. Sling belt according to claim 1 or 2, characterized in that the comb tube (1) is surrounded by at least one protective tube (8) which extends over the entire length of the chamber tube (1) or over a part thereof.

4. Sling belt loop according to one of claims 1-3, characterized in that the comb tube (1) consists of cast or extruded synthetic material.

5. Sling belt according to one of claims 1-3, characterized in that the comb hose (1) consists of polyurethane, PVC, synthetic rubber, natural rubber, leather, synthetic leather, nonwovens, textiles, steel fabrics or steel knitted fabrics or fabrics.

6. Sling belt sling according to one of claims 1-5, characterized in that the comb hose (1) has a coating (7) which consists of the same materials or different materials as the comb hose.

7. Sling belt loop according to one of claims 1-6, characterized in that the comb hose (1) is coated on one side, on both sides or all around.

8. Sling belt according to one of claims 1-7, characterized in that the chamber hose (1) is covered or coated with polyurethane, PVC, synthetic rubber, natural rubber, leather, synthetic leather, nonwovens, textiles, steel mesh or steel mesh or mesh.

9. Sling belt sling according to one of claims 1-8, characterized in that the chamber hose (1) has a cross section which is freely designed in terms of thickness, width and load capacity according to the application requirements.

10. Sling belt according to one of claims 1-9, characterized in that the at least two chambers (2, 2 ') arise by sewing, forging or weaving.

11. Sling belt loop according to one of claims 1-10, characterized in that the chambers (2, 2 ') have seams which are parallel to the inserts in the pulling direction and through which the comb tube is divided into chambers (2, 2') ,

12. Sling belt sling according to one of claims 1-11, characterized in that the inserts (4) made of high-strength materials such as polyester (PES), polyamide (PA), polypropylene (PP), polyethylene (PE), Dyneema, Kevlar, from them Mix or consist of steel strands.

13. Sling belt loop according to one of claims 1-12, characterized in that the inserts (4) in the chambers (2, 2 ') are arranged so that a large width with a small thickness or a small width with a large thickness is produced.

14. Sling belt loop according to one of claims 1-13, characterized in that the inserts (4) are arranged symmetrically or asymmetrically.

15. Sling belt loop according to one of claims 1-14, characterized in that the inserts (4) are loosely inserted.

16. Sling belt according to one of claims 1-15, characterized in that the loops (3, 3 ') have the same or a different length.

17. Sling belt according to one of claims 1-16, characterized in that the loops (3, 3 ') are covered by various protective materials.

18. Sling belt according to one of claims 1-17, characterized in that the loops (3, 3 ') thimbles (10, 10'), hooks (11) or eyelets (12).

19. Sling belt loop according to one of claims 1-18, characterized in that the loops (3, 3 ') are surrounded with a wide / narrow-woven loop protection (6, 6').

20. Sling belt according to one of claims 1 - 19, characterized in that the loops (3, 3 ') are covered with a fabric or hose.

21. Sling belt according to one of claims 1-20, characterized in that the loop protection (6, 6 ') consists of a synthetic or natural material, leather, synthetic leather, polyurethane, PVC or nonwoven fabric.

22. Sling belt sling according to one of claims 3 - 21, characterized in that the protective tube (8) consists of extruded or cast synthetic material such as PVC, PU, synthetic rubber or a rubber mixture.

23. Sling belt sling according to one of claims 3 - 22, characterized in that the protective tube (8) has a woven double jacket which is particularly resistant to chemicals and made of polyamide (PA), polypropylene (PP), polyester (PES) or polyethylene (PE), or a blend of these materials.

24. Sling belt sling according to one of claims 3 - 23, characterized in that the protective tube (8) consists of cut protection material which is resistant to high cuts.

25. sling belt according to one of claims 3 - 24, characterized in that the protective tube (8) is particularly heat-resistant and flame-retardant and consists of Kevlar, steel strands, Nomex or a combination thereof.

26. Sling belt loop according to one of claims 3 - 25, characterized in that the protective tube (8) has an extremely high abrasion resistance, cut resistance and edge strength due to different types of weave.

27. Sling belt loop according to one of claims 3 - 26, characterized in that the chamber tube (1), the protective tube (8), the coating (7), the inserts (4) and the edge protection have different or the same materials.

28. Sling belt sling according to one of claims 1 - 27, characterized in that it is designed for loads up to 100 t.