EP2552558A2

EP2552558A2 - Leisure or sliding sport apparatus with at least two layers, each having fields with fibers oriented in different directions

Info

Publication number: EP2552558A2
Application number: EP11723226A
Authority: EP
Inventors: Lothar Kroll; Jerome Rossol
Original assignee: Kaufmann Jorg
Current assignee: Kaufmann Jorg
Priority date: 2010-03-30
Filing date: 2011-03-29
Publication date: 2013-02-06
Anticipated expiration: 2031-03-29
Also published as: EP2552558B1; WO2011120516A4; WO2011120516A2; WO2011120516A3; DE102011001628A1; DE202010000504U1

Abstract

The invention relates to a leisure or sport apparatus, in particular a sliding sport apparatus such as a snowboard, ski, kiteboard, wakeboard, surfboard, or skateboard, having two end regions nose (3) and tail (4) and a region (M) extending therebetween, the leisure and sport apparatus being composed of a multilayer fiber composite system of layers of fiber reinforced plastic material, having a longitudinal axis (5) and a transverse axis (7) the point of intersection of which form a layer center point (Q), and at least two layers of the fiber composite system having a multi-area arrangement (6) having anisotropic material properties in areas of the multi-area arrangement (6). According to the invention, the at least two layers arranged above one another, at least in the region (M), are subdivided into areas having different fiber orientations by means of at least one dividing line in each layer, in such a way that the course of the dividing lines of the at least two layers arranged one above another is different, so that areas lying above one another and having different fiber orientations overlap, at least in some regions.

Description

Game or sports equipment, in particular gliding equipment

The invention relates to a game or sports equipment, in particular gliding equipment, such as snowboard, ski, kite board, surfboard, skateboard or wakeboard according to the preamble of the first claim, which is formed of a multilayer fiber composite system of layers of fiber-reinforced plastic material.

In the field of play and sports equipment with increasing tendency gliding sports equipment is used, which should have on the one hand under different use and loading conditions for the professional user as well as recreational athletes directional characteristics at the initiation of different load moments and single or multi-axis voltage states, depending on The respective, briefly changing operational situation optimal sliding and leadership characteristics, as well as reduced risk of falling and injury to the user to exhibit.

In order to prevent tilting in snowboards, it is known from WO 03/086554 A1, steel edges by plastic edges to replace, but this affects the handling characteristics of the snowboard on the track and on solidified ground. Such tilting occurs in particular in the so-called south, in which the athlete jumps for example with a 90 ° rotation on a railing handrail and the like and then slides along it, with the snowboard longitudinal axis is perpendicular to the direction of the railing. The difficulty here is keeping your balance and making sure the center of gravity is always above the center of the snowboard. If the position of the body center of gravity of the athlete deviates from this position, tilting may occur. In snowboarding, a distinction is made between the sections "Race", "Freeride" and "Freestyle". Each of these areas requires properties of the snowboard that are specially adapted to the respective field of application. In the field of "freestyle" the main applications are jumping over ski jumps, riding in halfpipes as well as sliding "south" on railings or the like relatively narrow track-like surfaces in which the snowboard slides transversely to its major axis (longitudinal axis) along this structure. From DE 31 13 360 A 1, a sheet-like material for the tread of a ski is known that has anisotropic properties due to different physical properties such as density and hardness, structure or polarity of the material between a central zone and the mutual edge zones. From US 2002/0195780 A 1, a snowboard is known, which has different cross-sectional configurations along its longitudinal axis, wherein in the central region of the snowboard this has a rectangular cross-section, however, in the direction of the two ends has an increasingly frusto-conical cross-section, so that not opposite edge regions have only an increasing width, but in this way also results in a reduced contact surface of the unloaded snowboard to the solid ground.

DE 196 04 016 A1 discloses a snowboard construction wherein fiber-reinforced resin layers are formed on both sides of a core plate, wherein the fibers of the successive fiber-reinforced resin layers are arranged in respectively opposite but symmetrical angles to the longitudinal axis of the snowboard. As fiber materials, glass fibers, carbon fibers or aromatic polyamide fibers may preferably be used.

In document DE 198 10 035 A1 a sliding board is described, in which an elongate, thin core element is integrated, that a tip, an end and a pair of opposite edges and a longitudinal axis which extends in a direction tip-end, a transverse axis extending in an edge-edge direction perpendicular to the longitudinal axis and a normal axis perpendicular to the longitudinal axis and to the transverse axis. The core element consists of at least two anisotropic structures laminated vertically, the mechanical property of the first anisotropic structure being selected from compressive strength, compressive stiffness, compressive strength, compressive strength, tensile strength, tensile stiffness, tensile swelling strength and tensile creep strength. The core region may have anisotropic structures with different orientation directions, which are designed for different loading directions. The core area is formed from segments of balsa wood and is sandwiched by reinforcing layers of glass fiber material.

However, these aforementioned constructive designs do not do justice to the very high alternating stresses. From DE 102007055532 A 1 a generic game or sports equipment is known, which has an improved structure of its layers of fiber-reinforced plastic material such that a targeted deformations depending on initiated stresses, in particular of single or multi-axial bending moments is possible. This object is characterized in a game or sports equipment of the type mentioned by solved that the fiber composite system has at least one layer with a multi-field arrangement with a predetermined fiber orientation in at least two fields of the multi-field array. Preferably, the multi-field arrangement is a four-field arrangement and substantially point or axisymmetric, with respect to a longitudinal and / or transverse axis of the game or sports equipment, in particular gliding equipment such as snowboard, adjacent fields are axisymmetric and diagonally arranged fields point symmetrical.

A disadvantage of this solution is that no power flow between the individual fields can take place due to the configuration of the multi-field arrangement. This can be explained by the fact that in the marginal zones between the respective fields only matrix material can be used to transmit the force flow. At higher loads, the strength of the multi-layer composite formed thereby is insufficient, so that a corresponding sliding sports device fails at the joining zones between the fields.

The object of the invention is to develop a game or sports equipment, in particular gliding equipment, such as snowboard, ski, kite board, surfboard, skateboard or wakeboard, in which by the formation of an anisotropic multi-layer composite in combination with residual stresses or other, initiated stresses like single or multi-axial bending stresses, a defined deformation behavior of the multi-layer fiber composite system is achieved, which withstands high alternating stresses and has excellent sliding properties.

This object is solved by the characterizing features of the first claim. Advantageous embodiments emerge from the subclaims.

The play or sports equipment, in particular gliding equipment such as snowboard, ski, kiteboard, wakeboard, surfboard, skateboard with two end areas Nose and Tail and an extending therebetween area consists of a multi-layer fiber composite system of layers of fiber reinforced plastic material, with a longitudinal axis and a transverse axis whose intersection point form a ply center, and at least two layers of the fiber composite system with a multi-field arrangement with anisotropic material properties in fields of the multi-field arrangement, wherein the at least two layers are subdivided at least in the central region of the sports equipment into fields with different fiber orientations by at least one division line such that the course of the dividing lines of the at least two superimposed layers is different, so that fields overlap with different fiber orientations of the superimposed layers. Preferred is in the direction of the longitudinal axis and at least one dividing line is provided in the direction of the transverse axis so that the dividing lines meet at at least one point spaced from the ply center with respect to the longitudinal axis and the transverse axis. Due to the layer structure according to the invention, unusual deformation effects are achieved when the sports equipment is loaded. In the case of a cut sweep (carving sweep), the snowboard is exposed to a bending load due to the edge and the sidecut radius, which, in addition to the resulting deflection, causes a slight curvature (covering concavity) of the sports equipment. As a result, the Aufkantwinkel between board and substrate is changed so that the edge grip is significantly increased during carving momentum.

In the so-called "South" the rider glides with the sports equipment over rails or railings-like obstacles (rails), which are made of metallic materials, causing friction effects between the metallic surface and the steel edge of the sports equipment, resulting in wear and damage Worn and damaged edges again pose a safety hazard when driving on the runway and have a negative impact on driving characteristics and driving comfort, and there is a risk that the steel edge of the snowboard cuts into the metallic railing run and the sliding movement is interrupted abruptly The risk of falling as well as the wear of the steel edge are substantially reduced by the layer construction according to the invention.The bending load in the so-called boardslide, which is adjusted by the weight of the driver, produces a slight concave side convexity of the snowboard, whereby the steel be lifted off the ground. By improving on-piste ride quality and reducing wear, as well as reducing the risk of falling to the south, this invention is associated with a leap in quality for gliding equipment.

At least two layers between the fields of the multi-field arrangement in the direction of the longitudinal axis preferably have at least one first dividing line at a first distance from the longitudinal axis and at least one second dividing line at a second distance from the transverse axis in the direction of the transverse axis, the first distance and the second order being at the two layers is different and thereby results in the overlap. Advantageously, the dividing lines extending to the longitudinal axis and / or the dividing lines extending in the direction of the transverse axis are arranged in alignment with one another or offset from one another. The multi-field array has at least two, preferably four fields (A, B, C, D) with a fiber orientation of reinforcing fibers, wherein the fiber orientation is inclined at an angle with respect to the longitudinal axis, and adjacent fields arranged one behind the other with respect to the longitudinal axis arranged fields have a mutually opposite inclination of the fiber orientation. With respect to the longitudinal axis, adjacent fields (A) and (C) and (B) and (D) and fields (A) and (B) and (C) and (D) arranged one behind the other have, in particular, a mutually mirror-symmetrical orientation of the fiber orientation on. Furthermore, the fiber orientation of reinforcing fibers in diagonally opposite fields is substantially identical or similar. The multi-field arrangement advantageously has fields (A, B, C, D) with reinforcing fibers in a predetermined fiber orientation as unidirectional scrim, unidirectional fabric, tailored fiber-placement semi-finished products, biotech semi-finished products and / or similar semi-finished textile-processed. In this case, one or more layers on the upper side of the core layer and one or more layers on the underside of the core layer are preferably arranged in mirror image relative to the core layer. The number of layers on either side of the core layer may be the same or different.

Preferably, several (in particular four) upper layers are arranged above a core layer and a plurality (in particular four) lower layers are arranged below the core layer such that all fields A, B, C, D of the respective upper layers and in a middle overlapping region spanning the layer center overlap the lower layers and

- That overlap along the longitudinal axis of the fields A and B with the fields C and D in two adjacent to the central overlap region and longitudinally extending overlap areas, and

that overlap along the transverse axis, the fields A and C with the fields B and D in two adjacent to the central overlap region and transversely extending overlap areas.

The fiber orientation of reinforcing fibers is preferably in the range of ± 50 ° to a major axis of the game or sports equipment, in particular to the longitudinal axis of the same. Advantageously, the reinforcing fibers are embedded in a polymeric matrix.

At least two layers of the sports equipment have the inventive design and are symmetrical, asymmetrical and / or different with respect to their fiber orientation the reinforcing fibers in the multi-field arrangement to at least one of the other layers and / or the core is formed.

The multi-field arrangement is advantageously designed symmetrically or asymmetrically with respect to the longitudinal axis and / or the transverse axis in one position. It is also possible to integrate in the game or sports device at least one active element, in particular piezoceramic, shape memory alloy and / or rheological fluid to support the anisotropic material properties of the fiber composite system in or between one or more layers, which also with a passive element, eg , As a control can be combined. For example, a plurality of active elements, in particular foils with at least one piezoelectric actuator each, can be arranged along longitudinal edges of the game or sports device.

According to the invention, the invention disclosed here inserts overlapping zones between the deformation-active multi-zone zones (DA) zones known from DE 102007 055 532 A, which enable a force flow between the fields known from DE 10 2007 055 532 A 1 and which first ensure that the gliding equipment withstand the high changing demands. In order to form the overlapping zones, the symmetry point of the multi-field arrangement known from DE 10 2007 055 532 A, which is at the same time the center of the gliding device, is displaced in at least one layer of the multilayer composite in such a way that the point of symmetry is not equal to the midpoint of the gliding device. As a result, the multi-field zones no longer have the same size in at least one position of the gliding device. The overlapping of the superimposed zones produced thereby leads to the formation of the overlapping zones necessary for the strength. Preferably, in the respective DA zone, in particular four-field arrangement or in at least a partial area of a field, the reinforcing fibers are arranged in a predetermined fiber orientation, the fibers preferably at an angle of ± 30 ° ± 15 ° to a major axis, in particular the longitudinal axis of the game or sports equipment are arranged and this fiber orientation, mirrored on one of the main axes, such. B. a longitudinal, transverse axis or another through the new symmetry point axes of the game or sports equipment, in an adjacent field of the multi-field arrangement exactly or with a difference of ± 15 ° recur. Advantageously, on both sides of a core, a plurality of layers of fiber-reinforced plastic material arranged, both sides of the core at least one layer has the structure according to the invention, wherein a kernel-containing core plane of the game or sports device forms a plane of symmetry, with respect to the fiber orientation of the reinforcing chamfers in the multi-field arrangement, on the one hand, of the core material, which in the at least one further layer, on the other hand, of the core material returns symmetrically or mirror-symmetrically. In this way, very balanced deformation properties over the cross section of the game or sports equipment, especially snowboards, realized and guaranteed a particularly stable driving and deformation behavior. Further, preferred embodiments of the game or sports device according to the invention are set forth in the remaining subclaims.

The targeted formation of at least one overlapping zone, in particular by a certain offset of the superimposed layers by the off-center division into individual areas with different fiber orientations of at least one layer ensures improved strength and thus longevity of the gliding device according to the invention.

Further details, advantages and features of the invention will become more apparent from the following description of preferred embodiments thereof in conjunction with the accompanying drawings, each of which schematically illustrate the subject invention with reference to preferred embodiments.

Show it:

1 is a schematic representation of a snowboard under spreading of its layers as a multilayer fiber composite system and showing the multi-field arrangement with a predetermined fiber orientation of reinforcing fibers in each of the fields, in a first variant,

Fig. 2 is a schematic plan view of the fiber orientations of the fields themselves

overlapping layers 2.1 to 2.4 of a snowboard with layer structure gem. FIG. 1,

3 is a schematic representation of a snowboard spreading its layers as a multi-layer fiber composite system and showing the multi-field arrangement with a predetermined fiber orientation of reinforcing fibers in each of the fields,

Fig. 4 is a schematic representation of a snowboard under spreading of its layers as a multilayer fiber composite system and showing the multi-field arrangement with a predetermined fiber orientation of reinforcing fibers in each of the fields,

Fig. 5 shows a layer of fiber reinforced plastic material according to another

Embodiment of the invention,

Fig. 6 shows a layer of fiber reinforced plastic material according to another

Embodiment of the invention,

Fig. 7 shows a layer of fiber-reinforced plastic material according to another

Embodiment of the invention,

Fig. 8 shows a layer of fiber reinforced plastic material according to another

Embodiment of the invention,

9 shows a layer of fiber-reinforced plastic material according to another

Embodiment of the invention,

10 shows a layer of fiber-reinforced plastic material according to another

Embodiment of the invention,

Fig. 1 1 a layer of fiber reinforced plastic material according to another

Embodiment of the invention,

Fig. 12 shows a layer of fiber-reinforced plastic material according to another

Embodiment of the invention,

Fig. 13 shows a layer of fiber reinforced plastic material according to another

Embodiment of the invention,

14 shows a layer of fiber-reinforced plastic material according to another

Embodiment of the invention,

Fig. 15 shows a layer of fiber-reinforced plastic material according to another

Embodiment of the invention,

16 shows a layer of fiber-reinforced plastic material according to another

Embodiment of the invention,

17 is a snowboard with a concave towards the ground curvature,

18 shows a snowboard with a convex curvature in the direction of the ground,

19 to 22 show the representation of four layers 2.4 to 2.1 (from top to bottom), each with only one division, which are connected to a layer structure 2 miteinender, Fig. 23, the representation of the overlap of the layer structure. 2

Figures 1, 3 and 4 show embodiments of the sports device according to the invention in the exploded view. It consists of a core layer 10 and layers above (2.1 to 2.4), which form an upper layer structure 2 and layers below (2.1 ^' to 2.4 ^' ) of this Core layer 10, which form a lower layer structure 2 '. Each layer has a front region 3, a rear region 4 and a central part M located therebetween. At least one layer, but preferably four layers 2.1 to 2.4 and 2.1 'to 2.4' are divided according to Figures 1, 3, 4 - at least in the central region M - by dividing lines T1 and T2 in four areas / fields A to D, wherein the Divide lines T1 and T2 meet in at least one point P or in several points P. These points P are spaced from the intersection point Q of the main axes 5 and 7 by the amount L1 in the transverse direction and L2 in the longitudinal direction. The layers above (2.1 to 2.4) and the layers below (2.1 ^' to 2.4 ^' ) of the core layer 10 are preferably made of fiber-reinforced plastic material, wherein the reinforcing fibers 9 within the fields A to D with respect to one of the main axes 5 or 7 by a certain Angle α and ß are inclined. Diagonally opposite fields A and D or B and C have a similar inclination. The layer structure is such that at least one dividing line T1 or T2 of a layer is arranged offset to at least one dividing line T1 or T2 of an above or below layer. This results in overlapping areas, which allow a force flow between the individual areas A to D and the layers with each other and thus ensure the necessary strength for use. It is provided according to Figure 1 in each layer a dividing line T1 in the longitudinal direction and two staggered dividing lines T2 in the transverse direction. The two middle layers 2.2 and 2.3 have a substantially identical structure and are merely mirrored to each other about the longitudinal axis 5 and the transverse axis 7. Similarly, the two outer layers 2.1, 2.4 have an identical structure and are also mirrored diametrically to each other. The layers 2.1 'to 2.4' essentially correspond to the layers 2.1 to 2.4. Figure 1 shows a schematic view of a snowboard 1 as an example of a game or sports device according to the invention, such a representation also corresponds to a position of the snowboard 1 like fiber-reinforced plastic material. Overall, the snowboard 1 therefore has a multilayer fiber composite system consisting of a plurality of upper layers 2.1 to 2.4 and lower layers 2.1 'to 2.4' of fiber-reinforced plastic material. Such a snowboard 1 has at least two layers 2 (here four lower and four upper layers) made of fiber-reinforced plastic material, which has a multi-field arrangement of here, for example, 4 fields AD. Corresponding regions E and F or G and H may be formed in the region of nose 3 and tail 4 with the same layer structure as the adjacent regions AD, but this is not mandatory, but may also be unidirectional there (eg parallel to one another) Longitudinal axis 5 of the snowboard aligned fibers (undivided) can be arranged, or they can Areas may be formed in any other way. In the present exemplary embodiment, a multi-field arrangement in the region M is formed by means of the four fields AD, the fields each having an asymmetrical fiber orientation of reinforcing fibers 9 relative to the longitudinal axis 5 or transverse axis 7. There is a first pitch T1 in the longitudinal direction and a second pitch T2 between the panels A to D in the transverse direction. The first division T1 is arranged at a first distance L1 from the longitudinal axis 5 and the second division T2 at a second distance L2 from the transverse axis 7, so that the divisions adjoin one another at one or more points P, which are different and thus asymmetrical with respect to the center Q is / are at which the longitudinal axis 5 and transverse axis 7 intersect. In this case, at least two layers of the snowboard 1 or more (four layers according to Figure 1) are preferably arranged with oppositely mirrored or similar arrangement above and below a core layer 10 and preferably provided with a four-field arrangement between Nose 3 and Tail 4, each field of this four-field arrangement and thus each of these fiber reinforced layers 2 anisotropic material properties. Each field A to D each multi-field array 6 is formed by unidirectionally arranged reinforcing fibers, in particular glass or carbon fibers, or bamboo, aramid or stone fibers (basalt) - also mixed forms are possible - formed, preferably in an angular range of about ± 30 ° (to eg ± 50 °) are inclined to the snowboard longitudinal axis 5, which is indicated by the hatching and wherein along the longitudinal axis 5 and the transverse axis 7 of the snowboard 1 and a layer 2 thereof the individual fields A to D. with their corresponding fiber orientation in the region of the longitudinal or transverse axis 5, 7 penetrate overlapping each other to achieve a stable composite material and high strength values in each layer 2.1 to 2.4 and 2.2 'to 2.4' of the snowboard 1. Alternatively, it is also possible, in successive layers (see Fig. 1), to divide the fields A and C, respectively, differently from the preceding layer 2, with the first T1 and second graduations T2, so that adjacent layers lying one above the other lie between 2.1 and 2.4 or 2.1 'to 2.4' have a certain offset of their first division T1 and their second division T2 to their longitudinal axes 7 and their transverse axes 5, said offset in each case also in the opposite direction, based on a "zero position" (core layer 10th ), can be performed alternately in successive layers. As a result, the dividing lines T2, T2 hit each other again at points P, which are always spaced from the layer center Q, resulting in overlapping mirrored layers overlapping areas of the fields, which achieve a reinforcing effect. Preferably, at least one layer 2.1 to 2.4 above a core layer 10 and 2.1 'to 2.4' below this core layer 10 in the above-mentioned four-field array each with mirrored or similar orientation of the reinforcing fibers 9 arranged to achieve a desired buckling behavior of the snowboard. Preferably, as shown in FIG. 1, each of the layers disposed on either side of the core 10 in either equal or different numbers (here equal numbers, 4 each) is formed with such a multiple anisotropy structure (panels A to D), thereby achieving when initiating a uniaxial bending stress state, as happens when gliding with the snowboard on a rail or a handrail, the gliding device has the required strength. Preferably, the individual layers 2.1 to 2.4 or 2.1 'to 2.4' have a thickness of about 0.05 to 0.4 mm, while the core layer 10 has a thickness of about 2 to 8 mm and either in a conventional manner, z. B. from a honeycomb core (eg., From aluminum, paper or plastic), wood or plastic or a combination of these or else also by means of the fields A to D of the layers 2.1 to 2.4 or 2.1 'to 2.4' corresponding Establishing the connection of anisotropic properties may be formed.

It is also possible on both sides of the core or the core layer 10 to arrange a different number of layers or to use layers of different thickness. Although an angle of about ± 30 ° ± 15 ° of the reinforcing fibers 9 in the direction of the longitudinal axis 5 is preferred, this angle can be varied within a range of -50 ° to + 50 ° and the respective layers 2 can also have different angles of the reinforcing fibers 9 have. Instead of a recommended unidirectional Geleges in the individual fields A to D but also other fiber-reinforced semi-finished products with anisotropic material properties can be used to give the fields or the multi-field assembly 6 and the entire layer aniosotropic material properties.

According to FIG. 1, the layer 2.1 overlaps

the field A with the overlying field B of the situation 2.2,

the field C with the overlying field A of the position 2.2,

the field D with the fields B and C lying above it 2.2.

It overlaps position 2. 2:

the field A with the overlying field C of the position 2.3,

field B with the above fields C and D of position 2.3

It overlaps position 2. 3:

the field B with the overlying field A of the position 2.4,

- the field C with the fields A and B of the layer 2.4 and the field D with the overlying field B of the situation 2.4.

This results in the plan view of the four layers 2.1 to 2.4, a substantially cross-shaped overlapping region of the fields A to D, which extends on both sides to the longitudinal axis 5 and both sides to the transverse axis 7.

From Figure 2 is a schematic plan view of the fiber orientations of the gem. Figure 1 over the core layer 10 arranged layer structure 2 of the fields A to D of the layers 2.1 to 2.4 shown, wherein these fiber orientations and the arranged under the core layer 10 layer structure 2 'corresponds to. It can be seen that on both sides of the longitudinal axis 5 up to a distance L1 and on both sides to the transverse axis 7 up to a distance L2 overlapping fiber orientations due to the overlapping regions of the superimposed layers 2.1 to 2.4 or 2.1 'to 2.4' (according to Figure 1) are. The areas of the fields A, B, C, D, which do not overlap with other areas of the superimposed layers, have a substantially identical fiber path. FIGS. 3 and 4 again illustrate the four-field arrangement, with four layers 2.1 to 2.4 provided above the core layer 10 (which produce a layer structure 2) and four layers 2.1 'to 2.4' provided below the core layer 10 (which have a layer structure 2 '). result) and which are each divided into four fields A, B, C, D by a first (longitudinal) division T1 at a distance from the longitudinal axis 5 and a second (transverse) division T2 at a distance from the transverse axis 7 asymmetrically and the four parts A to D have differently oriented reinforcing fibers 9. The layer structures 2 and 2 'are designed substantially the same. According to FIG. 3, there is provided in each layer a dividing line T1 in the longitudinal direction and a dividing line in the transverse direction which intersect in each case at a point P which is at a distance from the center point Q of the sheet. In FIG. 4, two mutually offset and longitudinal dividing lines T1 and a dividing line T2 in the transverse direction are provided in each layer, which meet at points P. The orientation of the reinforcing fibers 9 above and below the core layer 10 is oppositely mirror-symmetrical, ie, for example, the reinforcing fibers in the field A of the upper layers 2.1 to 2.4 above the core layer 10 at a first 30 ° angle α to the longitudinal axis 5 of the snowboard 1, while the reinforcing fibers 9 are rotated in the field A of the lower layers 2.1 'to 2.4' below the core layer 10 at an angle of 180 ° relative to the longitudinal axis 5 again at an angle ß of about 30 ° to the longitudinal axis 5 of the snowboard or a Deviation of ± 15 °. Furthermore, an arrangement of the upper layers 2.1 to 2.4 and the lower layers 2.1 'to 2.4' of FIG. 3 and FIG. 4 is possible, either the layers 2.1 to 2.4 above of the core 10 of FIG. 3 with the layers 2.1 'to 2.4' are combined below the core 10 of FIG. 4 or vice versa. Different orientations or angles α, β (see also FIG. 4) with respect to the course of the reinforcing fibers and to the longitudinal axis of the snowboard 1 can also be selected in individual layers. Depending on the strength of the formation of the desired deformation effects also deviating transverse field configurations can be selected from the combination of four fields, z. B. forming two mutually touching each other in the axis center Q and in the direction of the opposite ends respectively expanding conical regions with reinforcing fibers or using the reinforcing fibers only in the outside of the cone remaining free edge areas.

The figures. FIGS. 5 to 16 illustrate an embodiment of an exemplary position 2.1 of the snowboard 1 with fields A to D, division lines T1, T2, which intersect at a point P which is spaced from the position center Q, in which the longitudinal axis 5 and transverse axis 7 intersect , This could be any other situation. The areas shown in white in Fig. 5 to 16 are not necessarily fiber-free, but z. B. with fibers in unidirectional axial arrangement (parallel to the longitudinal axis 5 of the snowboard 1 and the position 2.1) are provided. The remaining surfaces in these embodiments indicate only the areas in which a practically arbitrary design can be made with regard to the arrangement of reinforcing fibers. In FIG. 5, the regions A to D are reduced in size by triangular regions in each case from the two ends. In contrast, in Fig. 6, the axial dimensions of the four-field arrangement are limited.

7 illustrates that it is sufficient if partial areas of the areas A to D in the multi-field arrangement 6 (here four-field arrangement) are provided with the initially explained fiber orientation (substantially in the angular range of approximately ± 30 ° ± 15 ° to the longitudinal axis). In the white areas shown in Fig. 7 z. B. axially arranged reinforcing fibers may be arranged parallel to the longitudinal axis 5 or these areas may be made of reinforced synthetic resin layers in any other way.

Fig. 8 shows an embodiment of a layer 2.1 in which the axial center region of the layer (parallel to the longitudinal axis 5) remains free from the inclined reinforcing fiber arrangement.

FIG. 9 shows an arrangement of the reinforcing fibers 9 similar to FIG. 8, however, with the recess of the respective end regions of the fields AD, from the fiber orientation to FIG explained at the outset basic structure of the embodiments of the present invention.

FIG. 10 corresponds to the construction of a layer 2.1 according to FIG. 7 with regard to the formation of end regions of the snowboard 1 according to FIG. 6 (shortened four-field arrangement 6). In the here not provided with fibers, white areas, z. For example, the fibers may be arranged in axial orientation, or other composite structures may be selected in view of certain strength requirements or desired properties of the snowboard.

The embodiment according to FIG. 11 is practically similar to a combination of the embodiments according to FIGS. 8 and 5. Incidentally, the above explanations apply correspondingly. The further exemplary embodiment according to FIG. 12 clarifies that the multi-field arrangement 6, in particular four-field arrangement, can also have partial regions of different size and, moreover, can also be shifted with respect to the longitudinal or transverse symmetry, as can be seen from the different size of the one with the reinforcing fibers 9 in inclined Arrangement provided subregions in relation to the transverse axis 7 is illustrated. The areas A and B on the one hand and the areas C and D on the other hand have mutually rounded side areas. In this way, the snowboard 1 can be given special local characteristics with regard to special features of the introduction of force or use of the snowboard. It is of course possible to combine the above-described embodiments in a snowboard in order to obtain specific deformation properties in the edge region of the longitudinal edges 11. While the multi-field array 6 is labeled with the fields A to D in Fig. 12 in the previous manner as in the above embodiments, the partial areas, i. H. Here, the sections actively involved in the desired deformation and provided with a correspondingly inclined arrangement of the reinforcing fibers in each case denoted by A 'to D'.

FIG. 13 shows an exemplary embodiment similar to that in FIG. 12 with regard to the formation of subareas A to D (as an effective multi-field arrangement), whereby these are also formed asymmetrically with respect to the transverse axis 7. Fig. 14 illustrates a formation of a layer 2.1 with sickle-shaped portions A 'to D' of the fields A to D, which also with regard to the arrangement of predetermined oriented reinforcing fibers 9 the desired deformations in the region of the longitudinal edges 1 1 with emphasis in the region of the transverse axis. 7 can be sufficient under the initiation of a uniaxial bending stress state. FIGS. 15 and 16 show further modifications of the formation of layers 2. 1, whereby it is also possible here to use other semi-finished fiber products with anisotropic material properties instead of the unidirectional layer recommended in fields A to D or provided at least in partial surfaces. Due to the different choice of layers, the properties of the snowboard can be widely varied and adjusted with a view to a desired "lifting" of the edges when "gliding" on a handrail or a rail.

In Figure 17, a snowboard 1 is shown in which in the direction of the ground, d. H. the lining side, a concave curvature is present, which is achieved for example by a carving momentum (see page 4).

Fig. 18 shows a snowboard 1 with a towards the ground, d. H. The covering side convex curvature, which is caused in the south (see page 4), Because the overlapping areas of superimposed fields have different fiber orientations, results in a reinforcement in the central region in the longitudinal and transverse directions, which realizes particularly good deflections of the snowboard can be, which were previously not possible, whereby the driving characteristics are significantly improved.

FIGS. 19 to 22 show individual layers 2.4 to 2.1, which are joined together to form a layer structure 2 according to FIG. 23 and each have only one dividing line T1 in the longitudinal direction or T2 in the transverse direction. The layers 2.4 (FIG. 19) and 2.1 (FIG. 22) have dividing lines T1 mirrored relative to each other about the longitudinal axis 5, which are each spaced from the longitudinal axis 5 and thus from the layer center Q. The layers 2.2 (Figure 20) and 2.3 (Figure 21) have mutually about the transverse axis 7 mirrored dividing lines T2, which are each spaced from the transverse axis 5 and the layer center Q.

As a result, according to FIG. 23, a hatched area of the overlay region of the layer structure 2 formed from the layers 2. 1 to 2. 2 extends on both sides to the longitudinal axis 5 and to the transverse axis 7.

The invention is not limited to use in snowboards, but can be applied in a corresponding manner for ski, kiteboard, wakeboard, skateboard, surfboard or other sports and play facilities with a layer structure.

Claims

claims

1. Game or sports equipment, in particular sliding sports equipment such as snowboard, ski, kiteboard, wakeboard, surfboard, skateboard with two end areas Nose (3) and Tail (4) and an extending therebetween area (M), the game and sports equipment consisting of a multilayer fiber composite system of layers of fiber reinforced plastic material, with a longitudinal axis (5) and a transverse axis (7), the intersection of which form a layer center (Q), and at least two layers of the fiber composite system with a multi - field arrangement (6) with anisotropic material properties in Fields of the multi-field arrangement (6), characterized in that the at least two layers are at least in the area (M) divided into fields with different fiber orientations by at least one dividing line in each layer such that the course of the dividing lines of the at least two superimposed layers different is, so that overlapping fields with bottom different fiber orientations at least partially overlap.

2. Game or sports equipment according to claim 1, characterized in that the at least two layers are at least in the area (M) divided into fields with different fiber orientations by at least two dividing lines (T1, T2, ...) such that the dividing lines (T1, T2, ...) meet at at least one point (P) which is at a distance from the ply center (Q) with respect to the longitudinal axis (5) and the transverse axis (7) and wherein the course of the dividing lines (T1, T2 ...) of the at least two superimposed layers is different, so that overlap fields with different fiber orientations at least partially.

3. Game or sports device according to claim 1 or 2, characterized in that between the fields of the multi-field arrangement in the region (M) in the direction of the longitudinal axis (5) at least a first division line (T1) at a first distance (L1) to the longitudinal axis ( 5) and that in the direction of the transverse axis (7) at least one second division line (T2) extends at a second distance (L2) to the transverse axis (7).

4. Game or sports equipment according to one of claims 1 to 3, characterized in that in the direction of the longitudinal axis (5) extending dividing lines and / or in the direction of the transverse axis (7) extending dividing lines are aligned with each other or offset from one another.

5. game or sports equipment according to one of claims 1 to 4, characterized in that the multi-field arrangement (6) in the area (M) at least four fields (A, B, C, D) with a Fiber orientation of reinforcing fibers (9), wherein the fiber orientation is inclined at an angle with respect to the longitudinal axis and wherein with respect to the longitudinal axis (5) juxtaposed fields and successively arranged fields have a mutually opposite tendency of the fiber orientation.

6. Game or sports device according to one of claims 1 to 5, characterized in that with respect to the longitudinal axis (5) arranged side by side fields (A) and (C) and (B) and (D) and successively arranged fields (A ) and (B) and (C) and (D) have a mutually mirror-image tendency of the fiber orientation.

7. Game or sports device according to one of claims 1 to 6, characterized in that the fiber orientation of reinforcing fibers (9) in diagonally opposite

Fields is substantially identical or similar.

8. Game or sports device according to one of claims 1 to 7, characterized in that the multi-field arrangement (6) fields (A, B, C, D) with reinforcing fibers (9) in a predetermined fiber orientation as unidirectional scrim, unidirectional fabric, tailored Fiber-placement semi-finished products, Biotex semi-finished products and / or similar textile-processed semi-finished products.

9. game or sports equipment according to claims 1 to 8, characterized in that one or more layers an upper layer structure (2) at the top of the core layer (10) and one or more layers of a layer structure (2 ') at the bottom of Form core layer (10) and a number of layers on either side of the core layer (10) are the same or different.

10. game or sports equipment according to one of claims 1 to 9, characterized in that overlap in superimposed layers according to the arrangement of the division lines, the fields of superimposed layers (in plan view) partially in the longitudinal and transverse directions.

1 1. game or sports equipment according to one of claims 1 to 10, characterized in that above a core layer (10) a plurality (in particular four) upper layers (2.1 to 2.4) an upper layer structure (2) and under the core layer (10) in each case a plurality of (in particular four) lower layers (2.1 'to 2.4') form a lower layer structure 2 '), such that in a central region spanning the middle point (Q)

Overlap area All fields A, B, C, D of the upper layers (2.1 to 2.4) of the upper Layer structure (2) and all fields A, B, C, D of the lower layers (2.1 'to 2.4) of the lower layer structure (2') overlap.

12. Game or sports equipment according to one of claims 1 to 1 1, characterized by a fiber orientation of reinforcing fibers (9) in the range of ± 50 ° to a major axis of the game or sports equipment, in particular to a longitudinal axis (5) thereof.

13. Game or sports device according to one of claims 1 to 12, characterized in that the reinforcing fibers are embedded in a polymeric matrix.