DE102011002796A1 - Carrier element for receiving in a train or Lastträgergurt - Google Patents

Abstract

Carrier element (1) for inclusion in a tension or load carrier belt (10) as a tensile or load-bearing element, which is essentially belt-shaped with two width delimitation lines B1 and B2 in cross section (Q) to the longitudinal extension direction and with two height delimitation lines H1 and H2 also in cross section (Q) is designed to the longitudinal extension direction, and which comprises a plurality of synthetic fibers running essentially in the longitudinal extension direction, which are embedded in a polymeric matrix material, at least one of the width delimitation lines B1 and B2 and / or at least one of the height delimitation lines H1 and H2 has a non-linear course.

Description

The present invention relates to a carrier element for receiving in a train or load carrier belt as tension or load-bearing element, which is formed substantially gurt-shaped. Furthermore, the invention relates to a suitably trained train or Lastträgergurt. For tensile or force transmission, the carrier element has a plurality of synthetic fibers extending substantially in the longitudinal direction, which are embedded in a polymeric matrix material.

Synthetic fibers are to be understood here and below as including either a non-naturally occurring material, in particular a chemically generated material, or consisting of it, as well as fibers produced in an artificial manufacturing process. For example, basalt fibers or glass fibers are synthetic fibers within the meaning of the present application. This applies in particular to any form of carbon fibers or aramid fibers.

Such carrier elements are intended to receive in a train or Lastträgergurt the forces acting on the belt forces and continue to conduct in a suitable manner, substantially along the fiber direction. The fields of application of such a train or load carrier belt are versatile and include u. a. Cable systems in conveyor systems, transport systems, train systems, elevator systems, or machines for train or power transmission.

The carrier element according to the invention is formed like a belt, d. H. it has a longitudinal direction along which the tensile or power transmission takes place. In addition, the carrier element also has a cross section perpendicular to this longitudinal extension direction, which has a substantially greater width extension than height extension. The width extension relates here to the effective width extension, d. H. about the average width extension. The vertical extent here also relates to the effective height extension, d. H. about the average height extension.

The geometric boundaries of the cross-section are defined by two width-limiting lines B1 and B2 perpendicular to the longitudinal direction and two height-limiting lines H1 and H2 also perpendicular to the longitudinal direction. If the delimitation or differentiation of the individual boundary lines of the cross-section is not immediately apparent, for example because the individual boundary lines meet at an angle of> 0 ° and form, for example, an edge or a peak, one can for auxiliary definition and delimitation of the individual boundary lines Rectangle be inscribed in the cross-sectional shape Q, so that the points of contact between the R cheeck edges and the cross-section Q respectively define the beginning and the end of the individual boundary lines. Likewise, a geometric section of a rectangular shape having the cross-sectional shape Q may allow the definition of the boundary lines if, for example, the cross-sectional shape Q is too complex or not symmetrical.

The carrier element is typically used in a state of use for tensile or force transmission, that a support of the train or load carrier belt takes place approximately in relation to a deflection or roller over the width extension, d. H. one of the height limiting lines H1 or H2 experiences contact with the deflection or roller and there occurs in frictional action with its surface.

It has now been found that with rectangular cross-sections of the carrier element it to voltage and / or pressure peaks, d. H. local increases in voltage or pressure increases, especially at the edges of such a rectangular cross-section can come. Due to the deflections, the tension at the edges is significantly increased even in the case of very tension-resistant fibers, such as carbon fibers, during deformation of the support element, for example during deflection around a roller, so that these areas can first succumb to material fatigue. Typically, therefore, with carrier elements having rectangular cross-sections, the first fiber breaks occur in the regions of the edges.

A comparable determination can also be made with regard to the pressure-loaded corner regions, which are subjected to deflection of the carrier element around a roller of increased pressure load or shear stress and due to this load preferably tire or break out of the matrix material.

The object of the present invention is thus to provide a carrier element for inclusion in a train or Lastträgergurt as a tensile or load-bearing element to propose, which has improved breaking strength and improved fatigue behavior in use. In particular, a support element is to be proposed, which can reduce fatigue in the region of the lateral boundary lines of the cross section Q.

According to the invention, this object is achieved in that at least one of the width limitation lines B1 and B2 and / or at least one the height boundary lines H1 and H2 has a non-linear course.

In particular, the object is formed by a carrier element for receiving in a train or load carrier belt as tension or load-bearing element which is substantially gurtförmig with two width limitation lines B1 and B2 in cross-section to the longitudinal direction and with two height-limiting lines H1 and H2 also in cross-section to the longitudinal direction and comprising a plurality of synthetic fibers substantially extending in the longitudinal direction embedded in a polymeric matrix material, wherein at least one of the width-limiting lines B1 and B2 and / or at least one of the height-limiting lines H1 and H2 has a non-linear course.

Also, the object is achieved by such a support member having train or load carrier belt. This may in particular have a suitable sheath of a polymer.

The invention is based on the idea that the carrier element can be adapted in terms of its cross-sectional shape to the loads in a state of use, that the stress and pressure peaks, which can be detected especially in a support member having a rectangular cross-section Q, by a suitable shaping the cross-sectional boundary lines, that is, the two width-limiting lines B1 and B2 and the two height-limiting lines H1 and H2, can be reduced. Here, in particular cross-sectional shapes have been found to be suitable, which have a non-linear course, especially a curved course, as these can be adapted to various requirements in practical use. Such are fundamentally different from purely rectangular embodiments, such as those from the US 4,563,391 A1 are known as prior art.

In the use state, different forces or stresses act on the carrier element, which, depending on the cross-sectional shape, can contribute to the formation of voltage peaks or pressure peaks, that is to say excessively high voltages or pressure peaks. Here, especially the bending stress and the bending pressure are to be expected, which occur when the belt-shaped support member is guided and deflected over a roller. Next is a surface pressure to be considered, with which the carrier element is pressed onto the roller, and can also contribute to a shift of the pressure or stress profile in the cross-section Q. A displacement of this profile can also be done by the drive torque, which, for example, a drive roller on the train or Lastträgergurt further to the support element when it is driven by the roller. Another important influencing factor, which may contribute to the change of the pressure or stress profile in the cross section Q, are torsional movements, or partial rotations about the longitudinal extension direction of the carrier element as a rotation axis. Such a torsional movement leads to a rotation of the otherwise belt-shaped carrier element and causes a tension peak, in particular in the case of the fibers, which are furthest away from the axis of rotation in the direction of longitudinal extension. Typically, these are the areas around the width boundary lines B1 and B2 which experience increased stress.

The combination of the influencing factors described above, which can be determined in detail for concrete applications, make it necessary in the context of the present invention to adapt the cross-sectional shape Q of the carrier element to the specific application in order to avoid premature wear or premature fatigue. Here, the present invention proposes to form at least one of the width-limiting lines B1 and B2 and / or at least one of the height-limiting lines H1 and H2 so that it has a non-linear course. A non-linear course is possible for a given stress and pressure profile, i. H. for a given application, to specify a cross-sectional shape in which there are no or only reduced stress and / or pressure spikes. In addition, the distribution of stresses or pressures in the voltage or pressure profile of the cross section can be suitably influenced. In particular, a deviation from a rectangular profile can specifically avoid the formation of stress and pressure peaks at the corners. By a non-linear course, in particular, the torsional forces can be advantageously influenced during a rotation of the carrier element in the longitudinal direction of extension and a bend perpendicular to this longitudinal direction.

Since the tensile or compressive stresses can sometimes be very high in tensile or load belt applications, even very small deviations in the cross-sectional shape of the support element can sometimes lead to significantly improved fatigue properties. For this purpose, it should also be considered that the train or load belt applications have to perform predetermined movements sometimes several million times over their lifetime, so that even small fluctuations in the voltage and / or pressure profile in cross section Q of a support element over the entire period of use already noticeable changes in the fatigue quality can lead. Sometimes even deviations from idealized ones can occur Have cross-sectional shape in the range of 1% of the surface area or less, a noticeable change in the long-term quality and long-term stability of such a support element.

Another core of the invention is also to be seen in making an adaptation of the cross-sectional shape Q of the support element to the stress and pressure conditions in a concrete train or load carrier application so as to obtain the best possible long-term stability of the support element throughout its life. In particular, it is possible with the present invention not only to postpone the fatigue until the unsuitability of the support member for a particular application, but also to influence the temporally functional course of this fatigue behavior low. This also makes maintenance much easier and more efficient in terms of time.

According to a first particularly preferred embodiment of the carrier element, it is provided that at least one of the width limiting lines B1 and B2 and / or at least one of the height limiting lines H1 and H2 has a single curved and / or a multiple curved course. A curvature of one of the width-limiting lines B1 and B2 in particular can reduce the stress or pressure peaks in the region of the width-limiting lines B1 and B2. Likewise, a curvature of one of the height boundary lines H1 and H2 can reduce the stress or pressure peaks in the area of the height boundary lines H1 and H2. Be particularly advantageous here simply curved boundary lines have made.

According to another embodiment of the invention, the cross-section Q is not substantially rectangular. A deviation from the rectangular shape reduces in particular the stress peaks at the corners of the rectangular cross-section Q.

In a further embodiment it can be provided that at least one of the width limitation lines B1 and B2 and / or at least one of the height limitation lines H1 and H2 has a substantially constant curved course. A constant curvature is in this case particularly easy to implement, since the formation of a tool for forming the carrier element can be carried out in a particularly simple manner. As a form of constant curvature, a circle segment or a pitch circle area should be mentioned.

In a further embodiment it can also be provided that the at least one of the width limitation lines B1 and B2 and / or at least one of the height limitation lines H1 and H2 has a variable curved course. A variable curvature allows a further improved matching of the cross-sectional area of the carrier element with the tension and pressure profile, which occurs in a specific application of the carrier element. A variable curvature can be suitably adjusted in particular to time-varying pressure profiles.

According to another embodiment of the present invention, it can also be provided that the width limitation lines B1 and B2 each form at most one peak. A tip can also be understood in terms of an edge. A peak is always formed between two boundary lines if at the point of their meeting there is a non-differentiable point. This abstract mathematical definition should also be interpreted in the sense of the physical expansions in the real world in such a way that a peak can be detected not only in one point but also in one area. For example, the extent of a synthetic fiber requires the interpretation of a peak not only according to a point expansion but in terms of an area expansion. In addition, peaks or edges very easily form areas of particularly high stress loads. These areas should be avoided as much as possible. In this respect, according to the embodiment, at most two tips can be provided. Thus, such an embodiment is compared to a rectangular embodiment by at least two peaks or edges, d. H. reduced by at least two regions of high potential voltage values.

According to a further embodiment, it can also be provided that at least one of the height-limiting lines H1 and H2 has such a curved course that the cross-section Q has a thickening extending in the width direction, in particular a centrally arranged thickening. Such a thickening is particularly suitable for increasing the tensile strength of the carrier element, but without increasing the torsional stresses of the carrier element to the same extent. In addition, such a cross-sectional shape is also suitable for transferring the surface pressure forces in a suitable manner onto the carrier element.

According to another embodiment, it can also be provided that at least one of the width limitation lines B1 and B2 has a curved course such that the cross-section Q has a thickening extending in the direction of vertical extent, in particular a centrally arranged thickening. Such thickenings can contribute in particular to the voltage peaks in the region of To reduce height limiting lines and so to influence the voltage and pressure distribution in the carrier element in a suitable manner.

Preferably, it can also be provided that the cross section Q has at most two, in particular only one, and particularly preferably no region at the width limitation lines B1 and B2 and the height limitation lines H1 and H2, which forms a tip. As already stated above, peaks or edges in the cross section Q of the carrier element always show little suitability for avoiding or reducing voltage peaks in the cross section of the carrier element. On the contrary, they usually increase the local stress values in the material of the carrier element. In this respect, a reduced number of tips or edges compared to the typical cross-sectional shape of a rectangle sometimes contributes to the fact that the total number of points or areas in which an increased tension sets can be reduced.

According to a further embodiment of the invention, it is also provided that the dimensional accuracy of the width limitation lines B1 and B2 and / or the height limitation lines H1 and H2 in the longitudinal extension direction of the support element does not deviate more than 5%, in particular not more than 2% and preferably not more than 1% , Since even small deviations in the cross-sectional shape or in the course of the cross-sectional shape can already noticeably affect the long-term quality or long-term stability of the carrier element, it is desirable to minimize the deviations in the cross-sections Q along the longitudinal direction of the carrier element, In order to simultaneously minimize the temporal changes in the occurring stress and pressure profiles as low as possible. In particular, when geometric adjustments of the cross section of the carrier element to the force ratios are made in a specific application, such deviations are sometimes disadvantageous. In particular, deviations of less than 1% may be desirable since even deviations in the range of 1% can sometimes lead to reduced long-term stability or faster fatigue.

Furthermore, in one embodiment, the synthetic fibers may comprise carbon fibers and / or aramid fibers and / or glass fibers. Due to their high strength, especially tensile strength, these fiber types are particularly suitable for tensile and load applications. However, other fibers may also be included. Here, in particular, the tensile strength, the modulus of elasticity, as well as the working capacity of the fibers to be considered, since they may be relevant for use as a tensile or load-bearing structure.

According to a further preferred embodiment it can be provided that at least 20,000 fibers are covered by the carrier element, which are separated in the longitudinal direction of extension substantially and / or extend substantially uniformly over the matrix material. The minimum of 20,000 fibers ensures sufficient strength for most tensile and load applications. Above all, with this number of fibers can also easily be produced on a large scale carrier elements, which are also sufficiently light in the weight for many applications. A limitation of the fiber number upwards need not be provided, but such proves due to the geometric dimensions of a given cross-section Q in many cases as practical and even inevitable. For example, in many applications an upper fiber count of 2,000,000 may seem reasonable. In particular, in industry-standard applications, an upper fiber count of 500,000 appear to make sense.

According to a particularly preferred embodiment, it can also be provided that the polymeric matrix material comprises a thermoplastic and / or an elastomeric and / or a thermoset polymer, in particular an elastomeric polyurethane or a thermoplastic-elastomeric polyurethane. Such matrix materials are particularly suitable for accommodating fibers in a flexible composite, wherein an introduction of force into the fibers can advantageously take place via the formed interfaces and adapted phase adhesion. Furthermore, the matrix materials have sufficient flexibility or elasticity to keep the rigidity of a carrier element sufficiently low for many applications. The distribution of the fibers in the matrix material can be substantially evenly distributed, or else substantially heterogeneous. A substantially uniform distribution of the fibers in the matrix material also allows the neglect of individual, partially arranged material defects in the design of the cross-sectional geometry.

According to a further embodiment of the invention, it can also be provided that the volume ratio of synthetic fibers to polymeric material is between 35 and 90, in particular between 45 and 80 and preferably between 55 and 70. On the one hand, such a volume ratio ensures a sufficient connection to the matrix material while at the same time providing advantageous elasticity and sufficient tensile strength of the carrier element. In addition, at these volume ratios results in an advantageous processability of the mixture of fibers and matrix material for example in the context of a pultrusion process or an extrusion process.

To avoid stress and pressure peaks in the cross section Q of the carrier element, it may also be advantageous for the synthetic fibers in the carrier material to have a substantially uniform bias. This pressure and voltage fluctuations along the longitudinal direction of the support member are increasingly avoided. In addition, the relative change in the fiber stresses in the carrier element is reduced approximately with a concrete use of the carrier element, so that the reduced relative change can also result in a relatively smaller change in the voltage and pressure peaks.

According to a further embodiment of the invention, moreover, the support element at the location of its greatest width extension is not greater than 20 cm, in particular not greater than 10 cm, preferably not greater than 5 cm and particularly preferably not greater than 4 cm. Such width expansions are suitable for most tensile and load applications, but at the same time allow for an advantageous reduction in stress peaks due to torsional forces.

According to a particularly preferred embodiment of the invention can also be provided that the support member at the location of its greatest height extent not greater than 0.4 cm, in particular not greater than 0.3 cm, preferably not greater than 0.2 cm and more preferably not greater than 0.1 cm or 0.05 cm. This height expansion allows on the one hand an advantageous flexibility or elasticity of the support member to be able to store a carrier element comprehensive tensile or Lastträgergurt about suitable on wheels, or to lay roles or to be redirected by these, at the same time especially in terms of occurring Bending stresses or compressive stresses reduced values can be achieved.

According to a further aspect of the invention, it can also be provided that the carrier element has a strength of at least 1 kN maximum load, in particular of at least 10 kN maximum load, preferably of at least 20 kN maximum load and particularly preferably of at least 30 kN or even 50 kN maximum Has load. Thus, the carrier element is suitable for most tensile or load applications. Larger load values can also be provided if required. In this case, however, the number of individual fibers in the carrier element in conjunction with their fiber strengths must be taken into account as above all.

According to further possible embodiments, the carrier element can be produced by a method known to the person skilled in the art. Such methods should be particularly well suited to the production of continuous structures, i. H. Structures that allow production of the carrier element in series are suitable. In addition, the cross sections Q of the carrier elements should be suitably adjusted by means of such methods. If these methods are carried out with suitable tools, the cross-sectional shapes can be set to specific applications, wherein the stress profiles or pressure profiles occurring in the cross-section Q can be advantageously taken into account.

Hereinafter, the present invention will be described purely by way of example with reference to advantageous embodiments with reference to the accompanying drawings. Showing:

1 a cross-sectional view of a known from the prior art support member having a rectangular cross section;

2a a cross-sectional view of a first embodiment of the invention for explaining the definition of the width boundary lines B1 and B2 and height limit lines H1 and H2;

2 B a cross-sectional view of a second embodiment of the invention to further explain the definition of the width boundary lines B1 and B2 and height limit lines H1 and H2;

3a a perspective view of a train or load carrier belt, which is steered around a roller, for explaining various influencing factors, which can also determine the tension profile or pressure profile in the cross section Q of the support member;

3b a perspective view of a twisted train or load carrier belt to explain the influence of the torsion, which can determine the tension profile or pressure profile in the cross section Q of the support member with.

4 a cross-sectional view of another embodiment of the invention;

5 a cross-sectional view of another embodiment of the invention;

6 a cross-sectional view of another embodiment of the invention;

7 a cross-sectional view of another embodiment of the invention;

8th a cross-sectional view of another embodiment of the invention;

9 a cross-sectional view of another embodiment of the invention;

10 a cross-sectional view of another embodiment of the invention;

1 shows a cross section through a carrier element 1 , which has a rectangular cross-section Q and is already known from the prior art. The carrier element 1 has a longitudinal extent L, which can be suitably selected depending on the application. Since, according to the invention, it is a substantially belt-like carrier element, the width extension B is greater than the height extent H. Width extent B and height extent H are to be understood or determined as effective values which can be determined, for example, according to averaging or RMS value determination.

A disadvantage of the embodiment of the carrier element 1 is the shape of the corners, which have edges K, which are indicated by individual encirclements. The edges K are respectively formed at the touch points of the width restriction line B1 and height boundary line H1, the width boundary line B1 and the height boundary line H2, the width boundary line B2 and the height boundary line H1, and the width boundary line B2 and the height boundary line H2. Since all boundary lines have a linear course, ie are designed as straight sections, edges K are formed at the respective points of contact.

It should be noted that in the present description of the invention no explicit distinction between edges K and peaks S should be made. Both in the case of the formation of edges, as well as peaks, it comes namely in carrier elements in specific situations of use for the formation of voltage spikes, especially in the areas of the edges or tips. Although a voltage peak in the region of a peak can be designed to be particularly high, this depends on a number of physical parameters as well as the specific application. In this respect, although edges and peaks will continue to be formally referred to separately below in the following, no distinction should be made in the context of the invention between these expressions.

As in 1 the cross section Q of the carrier element is shown 1 bounded by the width limitation lines B1 and B2 as well as by the height limiting lines H1 and H2. In particular, the width dimension B and the height extent H are uniquely determined by the length of the height boundary lines H1 or H2 and the length of the width boundary lines B1 or B2, respectively.

The determination of the width extension B and the height extension H in the in 2a embodiment shown requires either an RMS or other form of determination. In the present case, the values Breitenausdehnung B and the height extent H were determined as maximum values in each of the width extension direction and the height extension direction. However, this provision is not mandatory and may be replaced by other reasonable provisions.

2a shows a first and particularly preferred embodiment of the support member having a substantially all-round curved course of the circumference of the cross-section Q. In order to determine the beginning of the width limitation lines B1 and B2 as well as the height limitation lines H1 and H2, the cross section Q can be inscribed with a rectangle whose corner points allow the respective starting points or end points of the boundary lines B1, B2, H1 and H2 to be defined.

Once these starting points or end points have been established, the cross-section Q can be described as limited by the width limitation lines B1 and B2 and the height limitation lines H1 and H2, wherein all the boundary lines B1, B2, H1 and H2 each have a curvature which has a curvature profile which varies in each case has, d. H. the curvatures of the respective lines are not constant. In particular, the curvature values run such that they have a matching curvature value at the respective starting points or end points of the boundary lines B1, B2, H1 and H2, at which they respectively contact.

Is the cross-section Q symmetrical (even doubly mirror-symmetric), as in 2a 1, the description of a rectangle in the peripheral lines of the cross section Q can be used to unambiguously determine the respective starting points or end points of the boundary lines B1, B2, H1 and H2. However, as in 2 B shown, the cross-section Q no longer symmetrical can sometimes no longer be a clear determination of the beginning and end points of the boundary lines B1, B2, H1 and H2. However, this fact is not of decisive importance for the present invention, since in most cases it is only important to make a meaningful determination of the boundary lines B1, B2, H1 and H2. This can be the expert in case of doubt, make appropriate. Thus, in the embodiment according to 2 B approximately the width boundary line B1 of different intersections of the partially inscribed rectangle are determined with the circumferential line of the cross section Q. A presently meaningful choice could be made on the basis of the intersections, for example, such that a symmetrical design of the width limitation line B1 is achieved. However, since the exact shape of the boundary lines B1, B2, H1 and H2 is not relevant to the invention, it should be sufficient that a reasonable choice is made, which allows the concept of the invention in the cross-sectional shape on the basis of the boundary lines B1, B2, H1 and To describe H2.

3a shows a schematic and perspective view of a train or Lastträgergurt 10 with a carrier element 1 , which is deflected around a roll and partly runs around it. Alternatively, the illustration can also be used as a schematic representation of the carrier element 1 even be considered, which to the role 11 is diverted. The direction of rotation of the roll 11 is indicated here by an arrow in a suitable perspective. The circulation of the train or load carrier belt 10 takes place so that it enters on the inlet side at a right angle to the direction of the roller axis (plane, which is directed to the viewer) and after the deflection at an angle β is guided away from the roller, ie the longitudinal direction of the outlet side after the expiration of the role 11 is no longer perpendicular to the axis of the role 11 but essentially at a smaller angle, ie an angle of (90 ° - β). As an alternative to this embodiment, it may also be provided that the circulation takes place in such a way that the pull or load carrier belt on the inlet side enters at an angle deviating from a right angle to the direction of the roller axis, but on the outlet side at a right angle to the direction of the roller axis expires.

The angle β, between inlet direction and outlet direction, which is also called Fleetangle, causes torsion about an axis which is angled to the direction of longitudinal extension, and significantly influences the stress and pressure distribution profile over the cross-section Q along the longitudinal extension direction of the carrier element 1 after draining from the roll. In this case, the stresses or pressures in the region of the width limitation lines B1 and B2 are increased and can thus lead to an increased load on these areas and to an early fatigue over longer periods of use. Continue to carry the bend of the support element 1 due to the deflection around the roll 11 , As well as due to the contact force A to influence the voltage and pressure distribution profile over the cross section Q at. In particular, in this case, the areas of the support element 1 , which are arranged closer to the surface of the deflection roller, typically exposed to higher compressive forces and the areas of the support element 1 which are located further from the surface of the diverting pulley, typically higher tensile forces. Taking into account, inter alia, these physical factors, it can be stated that no peaks or edges should be provided in order to reduce overvoltages or voltage peaks in the region of the width limitation lines B1 and B2. In addition, the area of the carrier element 1 , which assigns the surface of the roll, a relatively less curved surface to the contact forces or contact forces better and more uniform in the support element 1 initiate.

3b shows a further form of torsion, namely about an axis in the direction of the longitudinal extent L in the longitudinal direction of the support element 1 , It is obvious that the areas of the support element 1 , which are closer to the central longitudinal extension line 15 are arranged, experience a lower rotation and consequently not so strong to voltage peaks in the cross section Q of the support element 1 contribute as further from the mid-longitudinal extension line 15 distant area. Thus, in particular, the regions which are arranged in the region of the width limitation lines B1 and B2 are exposed to a greater rotation, so that larger stress or pressure values are also to be expected there. In order to keep the stress and pressure peaks in such a case low, could have a cross-sectional shape Q according to 7 be provided, which has a symmetrical thickening in width extension. The thickening is closer to the central longitudinal extension line 15 arranged as about areas near the width boundary lines B1 and B2, and would thus be subject to lower voltage or pressure fluctuations. The cross section Q could consequently have a relatively more even distribution of stress or pressure.

4 shows a cross section Q through a further embodiment of a carrier element according to the invention 1 , As the embodiment according to 1 Also, the present embodiment has four edges K, which can contribute to a voltage or pressure increase in specific applications. Nevertheless, a non-uniformly curved height limiting line H1 contribute approximately to a greater tensile or load carrying force with simultaneous torsion about an axis parallel to the longitudinal extent L, but without undue tension or pressure peaks in the support element 1 introduce.

5 shows a cross section Q through a further embodiment of a carrier element according to the invention 1 , The embodiment differs from the embodiment according to FIG 1 merely in that the corners or edges of the carrier element 1 at least locally rounded. In particular, the voltage and / or pressure peaks typically occurring there are thus reduced.

The embodiment according to 6 differs from the embodiment according to 1 in that the two width-limiting lines B1 and B2 have a curved, in particular a non-uniformly curved course. Such a course is particularly suitable for avoiding voltage or pressure peaks in the region of the two width-limiting lines B1 and B2.

The embodiment according to 7 has curved width-limiting lines B1 and B2 and curved height-limiting lines H1 and H2, which in particular have a non-uniformly curved course. The embodiment according to 8th differs from the according to 7 to the effect that in each case a tip S (indicated by the encirclings) is provided in the region of the width limitation lines B1 and B2, which in the embodiment according to FIG 7 each replaced by rounded areas. Although in the area of the tips, a voltage or pressure increase can occur in concrete operation, however, the carrier element can after 8th run relatively flat, whereby the bending stresses can be relatively reduced, for example, when deflected around a roll.

The embodiment according to 9 has a cross-section Q, which differs from that according to 1 differs in that the corners are rounded, at the same time a central taper in the width boundary lines B1 and B2 and height limiting lines H1 and H2 is provided. The boundary lines B1, B2, H1 and H2 in this case are executed repeatedly curved. This embodiment allows a suitable stress or pressure distribution in the region of the width limitation lines B1 and B2.

The embodiment according to 10 shows an asymmetrical embodiment of the cross section Q, wherein the width boundary lines B1 and B2 each have a different curvature from each other. At the same time, the height limiting lines are not substantially curved.

Further embodiments can be obtained that in the 3 . 4 . 6 . 8th . 10 rounded edges or peaks are rounded with a predetermined radius of curvature. The radius of curvature can be adjusted in a suitable manner taking into account the present teaching.

Finally, it should be pointed out in particular that the embodiments described above are used on their own and in combination with each other. In particular, claimed embodiments of the invention may include individual features, i. H. approximately formations of the width boundary lines B1 and B2 and height limiting lines H1 and H2 in combination according to different embodiments have according to requirements.

At the same time, it should also be pointed out again that the shapes of the width limitation lines B1 and B2 as well as height limitation lines H1 and H2 in the present exemplary embodiments are to be understood only schematically and that no concrete size ratios can be derived from the figures. As already mentioned above, the deviations of the individual width limitation lines B1 and B2 as well as height limitation lines H1 and H2 from a fixed predetermined shape, for example a rectangular shape, may be only a few percent or even only about one percent or less, since such deviations already exist due to the high loads and the multiple load cycles, which the carrier elements 1 are exposed during their lifetime, a noticeable change in the long-term stability as well as the fatigue properties of the support element can be adjusted.

LIST OF REFERENCE NUMBERS

1

support element

10

Train or load carrier belt

11

role

15

Central longitudinal extension line

B1

Wide boundary line

B2

Wide boundary line

H1

Height line

H2

Height line

Q

cross-section

S

top

K

edge

B

width extension

H

height extension

L

Linear expansion

A

contact force

B

angle

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

• US 4563391 A1 [0013]

Claims (19)

Carrier element ( 1 ) for inclusion in a train or load carrier belt ( 10 ) as a tension or load-bearing element, which is substantially girt-shaped with two width-limiting lines B1 and B2 in cross-section (Q) to the longitudinal direction and with two height-limiting lines H1 and H2 also in cross-section (Q) is formed to the longitudinal direction, and which a plurality of synthetic fibers extends substantially in the longitudinal direction extending embedded in a polymeric matrix material, characterized in that at least one of the width limiting lines B1 and B2 and / or at least one of the height boundary lines H1 and H2 has a non-linear course. Carrier element according to claim 1, characterized in that at least one of the width-limiting lines B1 and B2 and / or at least one of the height-limiting lines H1 and H2 has a single curved and / or a multi-curved course. Carrier element according to one of the preceding claims, characterized in that the cross section (Q) is not substantially rectangular. Carrier element according to one of the preceding claims, characterized in that at least one of the width-limiting lines B1 and B2 and / or at least one of the height-limiting lines H1 and H2 has a substantially constant curved course. Carrier element according to one of the preceding claims, characterized in that at least one of the width-limiting lines B1 and B2 and / or at least one of the height-limiting lines H1 and H2 has a variable curved course. Carrier element according to one of the preceding claims, characterized in that the width-limiting lines B1 and B2 each form at most one tip (S). Carrier element according to one of the preceding claims, characterized in that at least one of the height-limiting lines H1 and H2 has a curved course such that the cross-section (Q) has a thickening extending in the direction of vertical extent, in particular a centrally arranged thickening. Carrier element according to one of the preceding claims, characterized in that at least one of the width-limiting lines B1 and B2 has a curved course such that the cross-section (Q) has a thickening extending in the width direction, in particular a centrally arranged thickening. Carrier element according to one of the preceding claims, characterized in that the cross-section (Q) at most two, in particular only one and more preferably no area on the width boundary lines B1 and B2 and the height boundary lines H1 and H2, which forms a tip (S). Carrier element according to one of the preceding claims, characterized in that the dimensional accuracy of the width limitation lines B1 and B2 and / or the height limiting lines H1 and H2 in the longitudinal direction of the support element not more than 5%, in particular not more than 2% and preferably not more than 1% in Lengthwise direction deviates. Carrier element according to one of the preceding claims, characterized in that the synthetic fibers comprise carbon fibers and / or aramid fibers and / or glass fibers. Carrier element according to claim 11, characterized in that at least 20,000 fibers of the carrier element ( 1 ), which are separated in the longitudinal direction of extension substantially and / or extend substantially uniformly over the matrix material. Carrier element according to one of the preceding claims, characterized in that the polymeric matrix material comprises a thermoplastic and / or an elastomeric and / or a thermosetting polymer, in particular an elastomeric polyurethane or a thermoplastic-elastomeric polyurethane. Carrier element according to one of the preceding claims, characterized in that the volume ratio of synthetic fibers to polymeric material is between 35 and 90, in particular between 45 and 80 and preferably between 55 and 70. Carrier element according to one of the preceding claims, characterized in that the synthetic fibers in the carrier element ( 1 ) have a substantially uniform bias. Carrier element according to one of the preceding claims, characterized in that the carrier element ( 1 ) at the location of its greatest width (B) not greater than 20 cm, in particular not greater than 10 cm, preferably not greater than 5 cm, and more preferably no larger than 4 cm. Carrier element according to one of the preceding claims, characterized in that the carrier element ( 1 ) at the location of its greatest height extent (H) not greater than 0.4 cm, in particular not greater than 0.3 cm, preferably not greater than 0.2 cm and more preferably not greater than 0.1 cm or 0.05 cm is. Carrier element according to one of the preceding claims, characterized in that the carrier element ( 1 ) has a strength of at least 1 kN maximum load, in particular of at least 10 kN maximum load, preferably of at least 20 kN maximum load and more preferably of at least 30 kN or even 50 kN maximum load. Pull or load carrier belt comprising a carrier element as a tension or load-bearing element according to one of the preceding claims.

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