DE202011050127U1 - Cargo security device - Google Patents

Abstract

Load securing device, in particular a lowering device, with at least one lashing means (1, 2) which essentially consists of a tensioning device (1) and a tensioning belt (2), the tensioning device (1) having at least one winding shaft (3) for the tensioning belt wound thereon (2), characterized in that the tensioning belt (2) has a friction-reducing coating (8) on at least one surface side (9).

Description

The invention relates to a load securing device, in particular Niederzurreinrichtung, with at least one lashing means, which consists essentially of a tensioning device and a tension belt, wherein the tensioning device is equipped with at least one winding shaft for the tension belt wound thereon.

In the course of load securing, the lashing down of a load on an associated loading area is of particular importance. This is understood to mean a procedure in which the load is pressed non-positively by the one or more lashing means on the loading area. In this way, there is a kind of "micro-toothing" between the load and the loading surface and consequently the friction is increased. As a result of the frictional force, the cargo is held on the cargo bed.

When lashing down, the lashing device is guided in the overvoltage above the load and usually fixed on two opposite sides of the load on the loading surface. This can happen in lashing points. To tighten the tension belt used for this purpose, the tensioning device is used, which is generally a ratchet. The force acting on the load in this way via the lashing means is called the prestressing force. It is applied exclusively by the tensioning device or ratchet as part of the lashing means of essentially the said tensioning device and the tensioning belt (cf., in addition, the article "New specifications for the calculation when lashing down" by Alfred Lampen, professional driver newspaper 11/04 ).

In a generic load securing device according to the DE 10 2004 011 003 B4 it is about locking systems, with the help of which the load on the loading area is secured forwards and backwards. A comparable load securing device or a tensioning device suitable in this context is also the subject of the utility model DE 90 16 471 U1 ,

In the lashing described, there is a problem that the observed friction values are relatively high. This applies, on the one hand, to the area of charge edges and, on the other hand, to the winding shaft for receiving the tension belt wound thereon. For this reason, there are already approaches to achieve a reduction in friction during lashing by special edge protectors. Examples of this are in the EP 2 311 687 A1 or the US 5,226,764 presented.

The previous approaches currently consider insufficient, that the applied with the lashing or its tensioning biasing force (standard Tension Force, S _TF ) is limited. D. h., The combination of tensioning device and strap, so the lashing, is usually characterized by a maximum biasing force, which can be applied with the help of the clamping device used, taking into account the tension belt used. - Although there have been attempts to increase the forces exerted mostly by lever forces on the winding shaft forces by an extension of the lever arm. However, problems arise in practice in that then the inevitably larger winding of the tension belt on the winding shaft can no longer be properly mastered or the tension belt must be adapted as such to the increased biasing force course. Here, the invention aims to provide a total remedy.

The invention is based on the technical problem of further developing such a load securing device such that the achievable pretensioning forces can be increased with simple and problem-free operation.

To solve this technical problem, a generic load securing device in the invention is characterized in that the tension belt is equipped on at least one of its two surface sides with a friction-reducing coating. As a rule, both surface sides of the tension belt will be equipped with the relevant coating.

In this case, the invention initially starts from the knowledge that although tension straps are usually fabric straps made of synthetic fibers. Nevertheless, these tend when winding on the winding shaft of the tensioning device that the individual winding loops do not slide properly along each other. On the one hand, this can be attributed to the fact that the surface of the fabric straps used most frequently as tension straps is irregular and, on the other hand, friction-increasing soiling of the tension straps is frequently observed in rough practical operation. As a result, set friction numbers between the individual winding loops of the recorded on the winding shaft tension belt, which are located in the dry state in the range of 0.5, anyway assume values of usually well above 0.3.

In contrast, the friction-reducing coating on at least one surface side of the tension belt according to the invention ensures that the friction coefficients are particularly in this range are significantly reduced and friction numbers of usually less than 0.2 and especially in the range of 0.1 are observed. In fact, the coefficients of friction between the winding loops and thus in the friction: tension belt - tension belt in the range of about 0.05 to about 0.2, if the coating is provided at least on one side, in the contact area.

In this way, compared to the prior art significantly increased biasing forces can be built using the lashing according to the invention used and thus can reduce the number of necessary lashing to secure a particular load. This not only leads to reduced costs for load securing, but also to a simplified attachment of the individual lashing.

In fact, in the context of the invention, a higher biasing force per lashing means is observed by at least 20%, in particular more than 30%, so that conversely the number of lashing means for securing an associated charge is reduced by at least 20%, in particular even by 30% and even more can be. This can be attributed to the reduced friction between the individual winding loops and applies in particular to the case that is used with a specially designed clamping device, as in the European patent application EP 10 192 205.2-1268 the applicant is described, to which reference is expressly made.

But even with conventional fixtures, a significant increase in the biasing force is observed. For example, clamping devices may be used, as described in the utility model already mentioned in the introduction DE 90 16 471 U1 have been described in detail.

According to an advantageous embodiment, the friction-reducing coating on at least one surface side of the tensioning belt is a flowable two-phase system. This is generally composed of a plastic and a solvent. The plastic is dispersed in the solvent. As a result, the plastic remains as a layer after predominant evaporation of the solvent. Polymeric ethers, such as, for example, polyalkylene glycols, polyether polyols, polyalkylene oxides, etc., can advantageously be used as solvents. Very particular preference is given to polyethylene glycol and polypropylene glycol. Mostly glycol ether is used.

The dispersed plastic is one which is flexible in a wide temperature range, for example, about -50 ° C to about 100 ° C. In addition, the plastic in question or the coating is weather-resistant and designed to be largely resistant to chemicals to withstand the harsh practical conditions in securing cargo can. Very particular preference has been found at this point polyurethane. In other words, the coating is, according to an advantageous embodiment, a polyurethane dispersion.

Polyurethane dispersions of this kind are particularly environmentally friendly, with the individual polyurethane particles usually being present in spherical form in a size range between approximately 30 nm and 1000 nm in the dispersion. As a result, the dispersion or the coating has a slightly milky white or yellowish appearance. The weight fraction of the plastic in the coating according to the invention is typically from 30% by weight to 50% by weight, but may also be up to 60% by weight. By resorting to the microscopic plastic or polyurethane balls particularly favorable friction conditions are observed.

The coating or the flowable two-phase system of, for example, the polyurethane dispersed in polyethylene glycol can be applied in a simple manner over the entire surface of the tension belt and leaves the desired polyurethane film. The film typically dries at room temperature. The plastic balls in the nanometer range then provide the observed friction coefficients.

As already explained in the introduction, the tension belt is generally designed as a fabric belt, that is, it uses a fabric of warp and weft threads. The individual threads are typically made of plastic and here in particular made of polyester. Because associated polyester fibers or polyester threads are very tear and abrasion resistant and otherwise absorb little or no moisture, so they are predestined for use for securing cargo. In addition, they are easy to dye.

The structure of the fabric or the fabric belt is usually made so that more than twice as many and preferably about three times as many warp threads are realized in comparison to weft threads in the tissue. D. h., The number of warp threads is a multiple of the number of weft threads per cm of bandwidth. As a result, the special load of the tension belt or fabric belt in the longitudinal direction or warp direction is taken into account. In fact, for example, more than ten warp threads / cm and in particular more than fifteen warp threads / cm of belt width can be used. In contrast, regularly about five weft threads / cm or more are used. In most cases, even six weft threads / cm of bandwidth are realized.

In addition, it has proven useful if the warp threads have a fineness of more than 2000 dtex and in particular a fineness of more than 3000 dtex. That is, the weight of the warp threads is in the range of 2,000 and especially 3,000 g / 10,000 m. The same applies to the weft threads.

In addition, the tension belt or fabric strap is composed according to an advantageous embodiment of two individual fabrics. The two individual fabrics are connected to each other in the longitudinal direction, and that over mostly extending in the warp direction binding threads. Typically, two binding threads / cm width of the tension belt or bandwidth are used. The fineness of the binding threads is more than 300 dtex and in particular more than 400 dtex.

As a result, a load securing device is provided, in which the lashing means used a much higher biasing force than previously applied and can also apply. This can be attributed in essence to the significantly reduced friction of the tension belt at loading edges and in particular during winding on the winding shaft. As a consequence of this, the prestressing force applied by the respective lashing means can be increased and less lashing means can be used to secure a given load than hitherto. This leads to a significant cost reduction in load securing with unchanged given cargo security. Here are the main benefits.

In the following the invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment; show it:

1 A load securing device according to the invention in an overview and

2 a schematic longitudinal section through an inserted strap after 1 ,

In the 1 a load securing device is shown, which is in the present case a Niederzurreinrichtung. The load securing device or Niederzurreinrichtung has in the example shown after 1 over a total of two lashing devices 1 . 2 , The respective lashing device 1 . 2 consists of a clamping device 1 and a tension belt 2 together. The tensioning device 1 is with at least one winding shaft 3 equipped, with the help of the wound thereon strap 2 is tensioned and the required biasing force is generated to an associated charge 4 on a cargo bed 5 to secure.

Securing the cargo 4 on the truck bed 5 done by lashing down. For this purpose, the cargo 4 non-positively on the loading area 5 pressed. This happens in such a way that the respective lashing means 1 . 2 about the charge 4 is guided and in the embodiment on both sides of the charge 4 a fixation in lashing points 6 on the truck bed 5 experiences. With the help of the tensioning device 1 is applied to be applied during lashing biasing force S _TF .

At the clamping device 1 In the example case, this is a ratchet, with the already mentioned winding shaft 3 and additionally one of the winding shaft 3 equipped locking mechanism is equipped. There is also a swivel lever 7 provided on the ratchet. With the help of the pivoting lever 7 can the winding shaft 3 be driven, wherein the locking mechanism ensures that the winding shaft 3 is not moved back against the completed in this Arbeitshub direction of rotation. As a result, the tension belt 2 on the winding shaft 3 wound. Further details on the function of the ratchet can be found for example in the utility model DE 90 16 471 U1 read. Of course, also other ratchets can be used as a tensioning device 1 are used, preferably such as those in the European patent application EP 10 192 205.2-1268 the applicant is described, to which reference is expressly made.

Of particular importance for the invention is now the fact that the tension belt 2 evidenced by the schematic representation of a longitudinal section 2 with a friction-reducing coating 8th equipped. In fact, the coating in question can be found 8th in the exemplary embodiment on both surface sides 9 of the tension belt 2 , and all over. That is, both surface sides and longitudinal surface sides 9 of the tension belt 2 are on their entire extension with the coating in question 8th equipped, mostly full surface.

For this purpose, first the tension belt 2 be prepared and then with the friction-reducing coating 8th be equipped. This can be done by applying the coating 8th on the tension belt 2 is sprayed on, the tension belt 2 through a bath with the coating 8th is passed or comparable surface coating method for the coating 8th be used.

When coating 8th it is a flowable two-phase system, which is in the Substantially composed of a solvent and a dispersed in the solvent plastic. In the illustrated embodiment, the solvent is polyethylene glycol or glycol ether and is used as a dispersed plastic polyurethane.

In fact, the plastic or the polyurethane is present in the solvent in the form of microspheres in a size range between 30 nm and 1000 nm, which of course is to be understood only as an example and not by way of limitation. This preserves the coating 8th their particular friction-reducing design, which in the result leads to friction numbers between two tension belts that slide along each other 2 be observed, which are located in the range of a maximum of 0.2.

Such friction conditions arise in particular on the winding shaft 3 then one, if the individual winding of the tension belt 2 be absorbed and slide along each other during the clamping process. Of course, the coating used according to the invention 8th on both sides of the tension belt 2 also a friction reduction in the range of edges 10 the charge 4 observed.

As a consequence of this, with the help of the tensioning device 1 Total of the lashing 1 . 2 applied biasing force S _TF compared to the prior art at comparable tensioning device 1 be increased by at least about 20% and in particular by more than 30%. As a consequence, the number of lashing means can be reversed 1 . 2 reduce by 20% and in particular by 30% and even more, which is required to charge 4 safely on the truck bed 5 lashing down.

The coating 8th or the used at this point dispersed plastic or polyurethane is flexible and weather-resistant and largely resistant to chemicals in the temperature range of about -50 ° C to about 100 ° C. This is the coating 8th or the one with the coating 8th equipped tension belt 2 predestined for the practical conditions already described.

Based on 2 you realize that the tension belt 2 is designed as a fabric belt. In fact, the tension belt or fabric strap sets 2 from two single tissues 11 . 12 put together by binding threads 13 coupled together. The two tissues 11 . 12 are equipped with a consistent bandwidth, which can be for example 30 mm and even more. Both tissues 11 . 12 are congruent and superimposed in longitudinal extension with the help of the binding threads 13 coupled together.

At the respective tissue 11 . 12 it is such, which is composed of plastic fibers and in particular polyester fibers. Here is the respective tissue 11 . 12 with twice as many and preferably even three times as many warp threads 14 compared to associated weft threads 15 depending on the width of the fabric 11 . 12 equipped. The warp threads 14 run in the longitudinal direction of the tension belt 2 and provide with their twice as large and in particular three times as large number compared to the weft threads 15 for that the tension belt 2 in the warp direction to absorb the already mentioned biasing force S _TF is able.

The warp threads 14 and the weft threads 15 each have a fineness of more than 2000 dtex and in particular more than 3000 dtex. In contrast, the binding threads 13 designed so that here typically a fineness of more than 300 dtex and in particular more than 400 dtex is sufficient. Incidentally, the tissue is 11 . 12 of the tension belt 2 designed so that, in general, more than fifteen warp threads 14 / cm are processed. In contrast, there are generally about six weft threads 15 / cm realized. The number of binding threads 13 is in the range of two binding threads 13 / cm belt width.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102004011003 B4 [0004]
• DE 9016471 U1 [0004, 0013, 0028]
• EP 2311687 A1 [0005]
• US 5226764 [0005]
• EP 10192205 [0012, 0028]

Cited non-patent literature

• "New specifications for the calculation when lashing down" by Alfred Lampen, professional driver newspaper 11/04 [0003]

Claims (15)

Load securing device, in particular Niederzurreinrichtung, with at least one lashing ( 1 . 2 ), which consists essentially of a tensioning device ( 1 ) and a tension belt ( 2 ), the tensioning device ( 1 ) with at least one winding shaft ( 3 ) for the tension belt wound thereon ( 2 ), characterized in that the tension belt ( 2 ) on at least one surface side ( 9 ) a friction-reducing coating ( 8th ) having. Device according to claim 1, characterized in that the tension belt ( 2 ) on its two surface sides ( 9 ) each with the coating ( 8th ) is equipped. Device according to claim 1 or 2, characterized in that the coating ( 8th ) is constructed as a flowable two-phase system of a dispersed in a solvent plastic. Device according to claim 3, characterized in that a polyether, for example polyethylene glycol and in particular glycol ether, is used as the solvent. Device according to one of claims 1 to 4, characterized in that the coating ( 8th ) or the dispersed plastic in a temperature range of about -50 ° C to 100 ° C is flexible, weather-resistant and largely designed to be resistant to chemicals. Device according to one of claims 3 to 5, characterized in that it is the dispersed plastic is polyurethane. Device according to one of claims 1 to 6, characterized in that the tension belt ( 2 ) as a fabric strap ( 2 ) is trained. Device according to claim 7, characterized in that the fabric strap ( 2 ) from two individual tissues ( 11 . 12 ). Device according to claim 8, characterized in that the two individual fabrics ( 11 . 12 ) by binding threads ( 13 ) are coupled together. Device according to one of claims 7 to 9, characterized in that the tissue ( 11 . 12 ) is constructed of plastic fibers, in particular polyester fibers. Device according to one of claims 7 to 10, characterized in that the tissue ( 11 . 12 ) more than twice as many, preferably three times as many, warp threads ( 14 ) compared to weft threads ( 15 ) having. Device according to claim 11, characterized in that the warp threads ( 14 ) and the weft threads ( 15 ) have a respective fineness of more than 2000 dtex, in particular more than 3000 dtex. Device according to claim 11 or 12, characterized in that with more than fifteen warp threads ( 14 ) / cm Band width of the tension belt ( 2 ) is worked. Device according to one of claims 11 to 13, characterized in that approximately six weft threads / cm bandwidth of the tension belt ( 2 ) or more are realized. Device according to one of claims 9 to 14, characterized in that two binding threads / cm bandwidth of the webbing ( 2 ) or more are provided.

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