WO2011101125A1

WO2011101125A1 - Trampoline

Info

Publication number: WO2011101125A1
Application number: PCT/EP2011/000733
Authority: WO
Inventors: Dennis Hack
Original assignee: Eurotramp Trampoline - Kurt Hack Gmbh
Priority date: 2010-02-17
Filing date: 2011-02-16
Publication date: 2011-08-25
Also published as: EP2391425A1; EP2391425B1; DE202010002469U1

Abstract

The invention relates to a trampoline comprising a jumping mat (3) mounted in a frame construction (2). Said jumping mat (3) consists of a intersecting arrangement of longitudinal strips (8) and transverse strips (9), the width of each strip being at least approximately 4 mm.

Description

trampoline

The invention relates to a trampoline.

Such trampolines generally have a jumping sheet, which is mounted with elastic elements, in particular springs on a frame construction.

The elastic properties of the jumping cloth required for performing jumps on the trampoline are indeed significantly influenced by the suspension of the jumping mat by means of the springs as elastic elements. However, a decisive factor for the jumping properties of the trampoline is the jump cloth itself.

Known trampolines of the Eurotramp, Weilheim, are used in particular as certified competition trampolines in popular and elite sports. Such trampolines have jump cloths which consist of an arrangement of crossed longitudinal bands and transverse bands, which are sewn together at their intersections.

Such trampolines already have good performance data. However, it has been found that such trampolines are not yet completely satisfactory due to the increase in athletes' performance, especially in border areas. It has been found, for example, that it is difficult for an athlete who uses such a trampoline for a ten-part competition in the event of a loss of jump height and possibly with the mobilization of large reserves of power to reach a sufficient jump level again for the outstanding residual jumps.

The invention has for its object to provide a trampoline of the type mentioned with improved functionality.

CONFIRMATION COPY To solve this problem, the features of claim 1 are provided. Advantageous embodiments and expedient developments of the invention are described in the subclaims.

The trampoline according to the invention comprises a jumping cloth which is mounted in a frame construction and consists of a crossed arrangement of longitudinal bands and transverse bands whose widths are each at least approximately 4 mm.

Particularly advantageously, the longitudinal strips and transverse bands have a width of exactly 4 mm. This complies with the minimum strip widths prescribed for competition trampolines.

With the inventively designed structure of the jump cloth from longitudinal bands and transverse bands with the same width in the range of 4 mm results in a significant improvement in the performance of the jump cloth and thus the entire trampoline. The increase in performance of the ski mat according to the invention with longitudinal bands and transverse bands, each with a width of 4 mm compared to known jumping towels whose longitudinal bands have a width of 4 mm and their transverse bands have a width of 6 mm, can be demonstrated by measurements in which a ball from a drop height of 4 feet on the jump sheet is dropped freely.

These measurements showed that for a conventional, well-known jumping sheet, the ball reached only 86% of the initial height after falling from 4 m height. In contrast, 90% of the initial height is achieved in a measurement with the jumping mat according to the invention. This significant increase in performance of the ski mat according to the invention causes athletes when using a trampoline with the inventive Jump cloth reach their competition height with considerably less effort. Women and young people in particular benefit from this because they can achieve optimum gymnastics heights with little effort.

In particular, an athlete who uses the trampoline with the jump sheet of the present invention, during a ten-part competition match, after having lost height during the competition exercises, will have to return to the necessary competition level for the remainder of the exercises.

A major reason for the increase in performance of the ski mat according to the invention is also a better air displacement during its deflection during the jumps with a jumping cloth.

The improved air displacement is obtained in particular when the distances between adjacent longitudinal bands and between adjacent transverse bands are each in the range between 13 mm and 16 mm.

While the upper limit is dictated by normative determinations, the lower limit has been found to be advantageous in different applications.

In general, smaller distances between the longitudinal bands and the transverse bands may be provided, but advantageously the respective distance is greater than the width of the longitudinal band or transverse band. According to a particularly advantageous embodiment of the invention, the jump cloth with its longitudinal bands and transverse bands of a tissue. The fact that the entire construction of the longitudinal bands and transverse bands consists of a finished fabric means that the longitudinal bands and transverse bands no longer have to be sutured at their seams, whereby a significant rationalization in the production process of the jumping cloth is obtained. Another significant advantage is that by the integral formation of the Jump cloth no slippage of the longitudinal bands and cross straps when performing jumps on the jump cloth may occur more. The jumping sheet thus has a perfect resistance to displacement of the longitudinal bands and transverse bands, which significantly increases the safety and quality of the jumping mat.

Furthermore, it is advantageous in the formation of the jump cloth as ready-made fabric that markings are already incorporated into the jumping cloth during the manufacturing process of the fabric. The markings to be applied to predetermined nominal positions define the jumping zone on the jumping sheet. This eliminates a costly subsequent application of such markings.

To mount a jumping cloth on the trampoline this is generally clamped by means of elastic elements in the frame construction. The so-mounted, new jump sheet has a certain clamping length in the transverse and longitudinal direction. Already after a few days or weeks of use of the trampoline stretch skates known from the prior art stretch permanently by about 2 to 2.5%.

In certain applications, such as the use of the trampoline in the field of competitive sports, such expansions of the jump cloth are unacceptable, since thereby the jumping properties of the trampoline deteriorate noticeably. As a result, in such applications, the jump cloths have to be replaced by new ones already after short periods of use. This represents a significant cost factor. In addition, the frequent replacement also requires an undesirably high amount of time. This disadvantage is avoided according to an advantageous embodiment of the invention in that the jump sheet consists at least partially of low-stretch yarns. With the so-formed jumping cloth, the maximum technical load capacity is permanently maintained, that is, the trampoline equipped with this jumping towel can be used with a uniform power output over a long period. Thus, the trampolines according to the invention can be used in particular in competitive sports. Especially in such applications in elite sports trampolines according to the invention can be used advantageously, since even there are small impairments of the power output are not acceptable.

The low-stretch yarns may for example consist of aramids, in particular para-aramids such as Kevlar or Twaron.

Similarly, the low-stretch yarns can be made of polyethylene.

Particularly low elongations are obtained with low-stretch yarns consisting of carbon fibers.

Also suitable for this low-stretch yarns of Vectran fibers, that is, fibers consisting of liquid crystal polymers.

Particularly advantageously, the jump sheets of the trampoline according to the invention form textile fabrics which consist of a mixture of the low-stretch yarns with synthetic fibers. Such synthetic fibers may be polyester yarns or polyamide yarns which are commonly used to make jump cloths.

By mixing the low-stretch yarns with synthetic fibers on the one hand the elastic properties of the jump cloths can be specified and adjusted. In addition, results from the use of such mixtures over slippers, which consist only of low-stretch yarns, a significant cost advantage, since the synthetic fibers are much cheaper than the low-stretch yarns. A constant delivery of the jump cloths can be further promoted by pre-stretching components of the fabrics forming the jump sheets, that is the longitudinal and transverse bands, so that they permanently deform and then no longer stretch during use of the trampoline. Also, particularly stable weaves may be used to make gusseted fabrics to further minimize stretching of the gussets during use.

The invention will be explained below with reference to the drawing. Show it:

Figure 1: Schematic representation of a trampoline. FIG. 2: a sectional view of the frame construction of the trampoline according to FIG. 1 with a jumping cloth clamped therein.

FIG. 3: exemplary embodiment of a jumping cloth for the trampoline according to FIG. 1.

Figure 1 shows schematically an embodiment of a trampoline 1, which has as essential components a frame construction 2 and a stored therein jump sheet 3.

The frame structure 2 consists essentially of a rectangular frame 4 and connected thereto feet 5 for installation on a base. In general, the frame construction 2 can be collapsible. In the frame 4 of the frame structure 2, as seen in Figure 2, the jump sheet 3 is clamped. For this purpose, springs 6 are fastened as elastic elements along the entire circumference of the ski cloth 3, which are then fixed on the inside of the frame 4. The springs 6 are advantageously identical. Advantageously, the springs 6 are formed as tension springs. As can be seen from FIG. 1, the springs 6 are covered by covers 7, to avoid the risk of injury from contact of the person using the trampoline 1 with the springs 6.

FIG. 3 shows the structure of the jump cloth 3 according to the invention for the trampoline 1 according to FIG. 1. The jumping cloth 3 has an arrangement of longitudinal strips 8 and transverse bands 9 which intersect one another.

All longitudinal strips 8 are identical. Also, all transverse bands 9 are identical. In the present case, the longitudinal strips 8 are formed identical to the transverse bands 9.

The longitudinal strips 8 and transverse bands 9 each have a constant width of 4 mm over their entire length. In the present case, the width is exactly 4 mm. In principle, the value of the width may deviate within certain limits, in particular within a range of 10% thereof.

The individual longitudinal strips 8 and transverse bands 9 are formed in the present case as woven bands, these generally consisting of synthetic fibers.

As can be seen in FIG. 3, the longitudinal bands 8 and transverse bands 9 form an orthogonal lattice structure, that is to say the longitudinal bands 8 run parallel to one another and at right angles to the transverse bands 9.

The jumping cloth 3 forms a shift-resistant construction in that the longitudinal strips 8 and transverse bands 9 are sewn together at their intersection points. In order to obtain such a shift-resistant construction, the longitudinal bands 8 and transverse bands 9 are tautly clamped to produce the jumping cloth 3, so that the sewing is then carried out under tension at the intersection points. Sewing is then carried out at each intersection with the highest possible number of stitches. The distances between the individual longitudinal strips 8 of the jump cloth 3 are constant in the embodiment according to FIG. The same applies to the distances between the individual transverse bands 9, which are advantageously the same size as the distances between the longitudinal bands 8. The maximum distance between two adjacent longitudinal bands 8 or two adjacent transverse bands 9 is limited by the applicable standards to 16 mm. The distance may also be at low values, and it has proven advantageous if the distance value is in the range between 13 mm and 16 mm. According to a particularly advantageous variant, the entire jumping sheet 3 with its longitudinal bands 8 and transverse bands 9 consists of a finished fabric. Thus, the longitudinal strips 8 and 9 transverse bands need not be sewn at their intersections.

The textile fabric which forms the jump sheet 3 contains low-stretch yarns, as a result of which the jump sheet 3 does not have any elongation values in the longitudinal or transverse direction even after a long service life.

In principle, the jump sheet 3 could consist entirely of low-stretch yarns. In the present case, the textile fabric which forms the landing cloth 3 is constructed from a mixture of low-stretch yarns with synthetic fibers. The synthetic fibers consist of polyester yarns or polyamide yarns.

The low-stretch yarns can consist of aramids. Particularly suitable are para-aramids such as Kevlar or Twaron, which are very low-expansion. In order to obtain high weather resistance, these low-elongation yarns may have a Teflon (PTFE) coating. Furthermore, low-stretch yarns for the jump sheet 3 can be made of polyethylene. An example of such yarns are Dyneema yarns.

Yarns made of carbon fibers are particularly suitable as yarns with particularly low stretch. These carbon fibers are not only extremely low-stretch, but also have a very high stability against UV light radiation.

Finally, Vectran fibers may also be used to form low stretch yarns for the jump sheet 3. These can be woven in particular with polyester. Vectran is a thermoplastic multifilament yarn spun from molten liquid crystal polymer. In general, several of the mentioned low-stretch yarns can be used in combination for the production of the jump cloth 3.

LIST OF REFERENCE NUMBERS

(1) trampoline

(2) frame construction

(3) Jumping sheet

(4) framework

(5) pedestal

(6) spring

(7) cover

(8) longitudinal band

(9) Cross strap

Claims

claims

1. trampoline (1) with a in a frame construction (2) mounted jump cloth (3), characterized in that the jump sheet (3) consists of a crossed arrangement of longitudinal bands (8) and transverse bands (9), the widths of each at least approximately 4 mm.

2. Trampoline according to claim 1, characterized in that the longitudinal strips (8) and transverse bands (9) each have a width of exactly 4 mm.

3. Trampoline according to one of claims 1 or 2, characterized in that the longitudinal strips (8) and transverse bands (9) are formed from a fabric.

4. Trampoline according to one of claims 1 to 3, characterized in that the distances between adjacent longitudinal bands (8) and between adjacent transverse bands (9) each amount to a maximum of 16 mm.

5. trampoline according to claim 4, characterized in that the distances between adjacent longitudinal bands (8) and between adjacent transverse bands (9) are each in the range between 13 mm and 16 mm.

6. trampoline according to one of claims 1 to 5, characterized indicates that the distances between adjacent transverse bands (9) and between adjacent longitudinal bands (8) are identical.

7. trampoline according to one of claims 1 to 6, characterized in that the jump cloth (3) consists at least partially of low-elongation yarns.

8. trampoline according to claim 7, characterized in that the longitudinal strips (8) and transverse bands (9) of the jump cloth (3) are pre-stretched.

9. trampoline according to claim 8, characterized in that the longitudinal strips (8) and transverse bands (9) are pre-stretched by drawing.

10. trampoline according to one of claims 7 to 9, characterized in that the low-elongation yarns of aramids or of para-aramids, in particular Kevlar or Twaron exist

1 1. A trampoline according to claim 10, characterized in that the low-expansion yarns consisting of aramids a Teflon

(PTFE) coating have.

12. Trampoline according to one of claims 7 to 9, characterized in that the low-stretch yarns made of polyethylene or carbon.

13. Trampoline according to one of claims 7 to 12, characterized in that the jumping cloth (3) is formed from a mixture of synthetic fibers consisting of yarns and low-elongation yarns.

14. Trampoline according to claim 13, characterized in that the jumping cloth (3) contains as synthetic fiber yarns polyester yarns or polyamide yarns.