DE202004011143U1 - ball case - Google Patents

Abstract

Ball Sleeve (1), especially for Soccer Balls a number of interconnected, especially sewn, sections (2, 3, 4), characterized by a first group substantially like shaped sections (2) of substantially circular shape, the one ball cap of the ball cover (1) form or cover, or substantially annular Form, which form or cover a ball zone of the ball cover (1), wherein each two adjacent sections (2) of the first group via one each Section (3) of a second group substantially the same shape Sections are connected, which are one of the adjacent shape of the sections (2) have the first group adapted and elongated shape.

Description

The Invention relates to a ball cover, especially for Soccer Balls a number of interconnected, in particular sewn, sections has.

Ball covers of this type are well known in the art, for example on the DE 202 20150 U1 is pointed out.

In 1 a previously known ball cover is shown in a perspective view, which is made of a number of sections, which are made for example of leather or plastic, with which the Balloberfläche, ie a spherical surface or an ellipsoid surface is parqueted. At the in 1 illustrated ball cover 1 come hexagons (hexagons) 19 and pentagons (pentagons) 20 used, which are interconnected. To every pentagon 19 around are on its side surfaces adjacent five hexagons 19 arranged. It's hit every corner of the hexagons 19 or Pentagone 20 three seams together, namely at the meeting point 21 , For example, there is such a ball sleeve 1 from 32 sections (20 hexagons and 12 pentagons), the 40 such meeting places 21 has three seams.

in the The prior art is further a wide variety of possibilities described how the surface sections, the the ball cover form, can be shaped.

In the DE 196 29 727 C2 the Balloberfläche is formed from circular sections, between which are arranged correspondingly tailored connecting portions, each connecting four circular sections.

The DE 195 35 636 A1 parquet the ball surface with a large number of polygons. Here are circular structures by a number, z. B. formed by ten triangles, with several of these circular structures are connected by other polygons.

Other ball cases with special training sections are, for example, from DE-PS 418 700, DE-PS 622 592, DE-PS 682 750, the DE 44 08 047 A1 , of the DE 44 34 751 A1 and the DE 89 08 027 U1 known.

at all previously known ball covers need three Considered criteria In order to produce a ball in an economic way, the also has good playing characteristics.

First of all must Care should be taken that the number of sections with which the sphere surface is parqueted, not overly large. Just Thus, an economical production of a ball cover can be achieved become. Are too many sections provided, each with each other connected, for example sewn, Need to become, is a big effort required to the ball cover manufacture, which makes the production costs large.

Farther it is disadvantageous if a large number of meeting places of seams is available. The ball cover especially in those places where several seams meet, when using the ball in wet water absorb what the playing characteristics negatively influenced. A good ball should absorb little water, so that its playing characteristics even when using in damp Environment not changed become. Thus, it is desirable that the Balloberfläche possible has few meeting points of several seams.

Finally has the roundness of the ball or the ball cover a great importance. The ball should be as possible be shaped round, d. H. the possible have exact shape of a sphere or an ellipsoid. This can therefore only approximate be achieved because the individual sections are essentially flat are spherical and only by the internal pressure in the ball within its elasticity be deformed.

For a ball of the type mentioned at the outset, which is composed of hexagons and pentagons, a certain degree of ovality results due to the concept 10 is illustrated. There is the section through the ball cover according to 1 along a great circle and centric through a pentagon 20 and two hexagons 19 outlined over a quarter of the ball circumference. Entered are the distances between the ball center 22 and the middle of the section or meeting points of two sections. The sections are just drawn, ie a spherical deformation due to the pressure inside the ball was not taken into account.

The radius r ₀₁ is the distance from the center of the ball 22 to the middle of the pentagon 20 ; he is in one embodiment 103.3 mm. The distance r ₀₂ gives the distance between the ball center 22 and the middle of a hexagon 19 at, in the embodiment, this radius is 106.1 mm. The radius r ₀₃ describes the distance from the ball center 22 to the junction between a Pentagon 20 and a hexagon 19 and is in the embodiment 108.7 mm. r ₀₄ is the distance between the ball center 22 and the junction between two hexagons 19 ; the value is 110.2 mm in the exemplary embodiment. The ratio between the largest and smallest radius - in the present case between the radius r ₀₄ and the radius r ₀₁ - gives the out-of-roundness of the ball cover 1 at; in the embodiment, the ratio is 1.067.

to strut is that this ratio preferably close to the value 1, so that the roundness of the ball cover possible is great.

in the Light of the known embodiments of a ball cover is The invention is based on the object, a ball cover of the type mentioned to create, when possible, all three criteria well fulfilled are, d. H. that the ball cover as few as possible Has sections that need to be sewn together that one possible small number of meeting places of several seams is present and that also the ball roundness as possible is great.

The solution This object by the invention is characterized by a first group of substantially equal shaped sections with in essential circular shape, which form a ball cap of the ball cover or covering, or substantially annular shape, the one Ball zone of the ball cover form or cover, each with two adjacent sections the first group over each a section of a second group substantially the same shape Sections are connected, which are one of the adjacent shape of the sections have the first group adapted and elongated shape.

Preferably are on the surface the ball cover equally distributed at least four sections of the first group are arranged; a preferred embodiment Foresees that on the surface the ball cover equally distributed six sections of the first group are arranged.

A Development of the ball case according to the invention sees suggest that at least a portion of the sections of the first group, preferably all sections of the first group, essentially a circular one Shape and concentric sections inside the annulus a third group arranged in a substantially circular shape are. It can be provided that at least a part of the sections the first group, preferably all the sections of the first group, from each one interrupted at a single circumferential point circular ring part are made, wherein the points of interruption facing sides the circular ring part connected to each other, in particular sewn, are. Furthermore, it can be provided that the point of interruption in the plane and stress-free state of the section of the first Group over an angular range between 20 ° and 130 °, preferably between 40 ° and 50 ° at six sections of the first group and between 60 ° and 70 ° at four Sections of the first group, extends.

alternative It can also be provided that at least part of the Sections of the first group, preferably all sections of the first group, from each one at several, preferably at three or four, circumferential locations broken circular part are made, the interruption points facing sides of the circular ring part connected to each other, in particular sewn, are. According to the previously explained Production of the circular ring part by joining the ends of a single Break point of a circular ring part can thereafter so several segmentally formed, preferably the same circular ring part elements be joined together to form the entire circular ring part. In this case, preferably four equally sized circular ring segments are used, if the ball cover is provided with six sections of the first group; three alike size A circular ring segments can be used with advantage if the ball cover with four sections of first group is equipped.

The outer radius of the annular part formed by the sections of the first group is included preferably at least twice the inner radius of the circular ring part.

With regard to the sections of the second group with elongated shape, the following configurations have proved successful:
First, it can be provided that the sections of the second group are formed strip-shaped. In this case, each section of the second group may have a length which corresponds to at least twice the largest width of the section. Each section of the second group may further be formed symmetrically with respect to two mutually perpendicular axes.

A good opportunity for tiling the surface the ball cover is favored by, if according to education everyone Section of the second group on both lateral sides one out of two Straight lines or two circular arcs having formed tip. The straight lines or circular arcs can do this to one of the axes an angle between 35 ° and 110 °, preferably between 40 ° and 60 °, especially preferably between 47 ° and 49 ° at four sections of the first group and between 56 ° and 59 ° at six Include sections of the first group.

The lateral boundary of the two long sides of each section The second group can be defined by a circular arc or by a elliptical arch are formed. The sections of the second group can continue to have a greater width in their end, than in their middle area. Preferably, the largest width corresponds each section of the second group at least twice the smallest width of the section.

The ball cover or its parts exist with Advantage of plastic, in particular of thermoplastic or thermosetting material, or of rubber. Suitable plastics are polyethylene, polypropylene, polybutane, polyamide, polyurethane, polyvinyl chloride, polyolefin, ethylene-vinyl acetate or a mixture of at least two of these plastics. The ball cover or its parts can also be made of leather or synthetic leather. Furthermore, synthetic material is suitable for the ball cover, for example a fabric made of nylon or cotton.

The proposed ball cover characterized by a relatively small number of sections, the ball surface parkettieren. Furthermore, the number of meeting places is also of seams relatively low. After all is a good roundness of the ball sleeve before.

Not It is also immaterial that the required sections for the tiling the ball surface have a relatively simple contour, what the manufacture and Handling during processing makes it easy.

In Advantageously, the ball cover according to the invention also has a very high dimensional stability.

In the drawing is an embodiment of Invention shown. Show it:

1 a ball sleeve in perspective view according to the prior art,

2 a ball cover in perspective view according to an embodiment of the inventive concept,

3 the ball cover according to 2 in a larger scale,

4 the top view of a plane resting portion of the first group,

5 the top view of a planar portion of the second group,

6 the top view of a planar portion of the third group,

7 the top view according to 5 in a larger scale,

8th a ball zone of the ball cover, as formed or covered by a section of the first group,

9 a ball cap of the ball cover, as formed or covered by a section of the third group,

10 the cut through the ball cover according to 1 according to the prior art along a great circle and centric by a pentagon and two hexagons and

11 which to 10 Corresponding section through the ball cover according to 2 ,

In 2 is an embodiment of the ball cover according to the invention 1 shown, 3 shows the ball cover 1 increased. As can be seen, the surface of the ball is three differently shaped sections 2 . 3 and 4 provided, with all sections are sewn together. As an alternative to sewing, gluing or welding of the sections is also possible.

The ball cover 1 can be used for footballs or volleyballs as well as for any other balls.

A first group sections 2 has a substantially annular shape, which is a ball zone of the ball cover 1 form or cover. A sphere zone 23 is in 8th illustrated. It is the surface of the spherical layer perspectively shown in this figure. In the embodiment, six sections 2 the first group evenly distributed over the surface of the ball cover. Another preferred embodiment (not shown) has only four sections 2 on.

Centrally within through the section 2 formed recess are sections 4 arranged a third group. This third group sections 4 has a substantially circular shape, which is a ball cap of the ball cover 1 form or cover. A ball cap 24 is in 9 shown. This is the surface of the spherical segment shown perspectively in this figure. In the embodiment, six sections 4 the third group within the sections 2 arranged.

The connection of two sections 2 is about sections 3 made a second group. The sections 3 have one of the adjacent shape of the sections of the first group 2 adapted form. Furthermore, they are elongated or strip-shaped. In the illustrated ball cover a total of twelve sections 3 the second group used. There exist - as in 3 can be seen - meeting places 21 where three seams meet. While only 20 such locations are present here, the ball sheath according to the prior art 32 such sites that are critical to water absorption. This improves the consistency of the playing characteristics of the ball case according to the invention.

In the 4 . 5 and 6 are the three groups of sections 2 . 3 and 4 shown separately, this being just lying on or spreading surfaces, the only after sewing the in 3 take sketched form.

In 4 you can see what the basic part looks like, from a circular section 2 (S. 3 ) is formed. A circular ring part points at a circumferential location 5 an interruption. This interruption extends over an angle β, which is preferably between 20 ° and 130 °, in six provided sections 2 preferably at about 45 °. The pages facing the point of interruption 6 and 7 are then sewn to the section 2 to build. It can be a page 6 respectively. 7 or both sides may be straight formed or provided with a circular arc. In 4 you can see that both sides 6 . 7 are formed slightly circular, so that the section 2 after sewing the pages together 6 . 7 essentially the shape of a sphere zone 23 (S. 8th ) having. Otherwise, the shape of the circular ring part is determined by the radii R ₁ and R ₂ . In the embodiment, the outer radius R _{1 is} 78.2 mm, while that of the inner radius R _{2 is} 28.2 mm.

The sections 3 the second group are in the 3 and - with more details - in 7 shown. The section 3 has an elongated or strip-like design. In this case, the length L of the section 3 at least twice the largest width B of the section 3 , The section 3 is also formed symmetrically, with respect to two axes 8th and 9 that are perpendicular to each other. On the two transverse sides 10 of the section 3 is ever a tip-shaped widening provided, ie a tip 13 passing through two straights 11 and 12 or be formed by two circular arcs. In the embodiment, two straight lines 11 and 12 provided to the axis 8th include an angle α of 57 °.

The lateral limits 14 the sections 3 in the area of their longitudinal sides 15 are formed by elliptical arches, possibly also by circular arcs, which are chosen in size so that when sewing together with the sections 2 to fit the circular shape through the outer radii R _{1 of} the sections 2 To be defined. In the embodiment with six sections 2 the arc length s is a quarter of the circumference, passing through the outer edge of the annulus section 2 is determined. In the case of four sections 2 cheat the arc length a third of the circumference.

As can be seen further, this results in a shape of the sections 3 in which these are in their end areas 16 and 17 have a greater width B than in their central region 18 where the width is denoted by b. In this case, preferably corresponds to the largest width B of each section 3 at least twice the smallest width b. In the exemplary embodiment, the width b is 14 mm.

In relation to the in 1 Sketched ball sleeve is to mention that the length L of the sections 3 is greater than the diameter of the hexagons 19 , whereby a higher dimensional stability of the proposed ball cover is achieved.

In 6 is finally a section 4 to see the third group, which consists of a circle part. The radius R _{3 of} the part is in the exemplary embodiment at 24.0 mm. This radius can also be chosen significantly larger and be more than 30 mm. This is especially the case when in one of the sections 4 a valve must be integrated to fill the bladder.

The ball cover 1 thus not only has relatively few sections (namely 24 compared to the 32 of the ball cover according to FIG 1 ), the number of meeting points of three seams is significantly less with 20 than in the case of the ball cover after 1 where there are 32 posts.

Furthermore, the roundness of the ball cover is also due to the concept 1 in the inventive solution larger than the ball according to 1 , As already stated (see explanations for 10 ), there is a minimum radius r ₀₁ of 103.3 mm opposite a maximum radius r ₀₄ of 110.2 mm. The maximum radius is therefore 106.7% of the minimum radius.

The conditions in the ball according to the embodiment of the invention are in 11 shown.

For the ball cover 1 according to 2 respectively. 3 is in 11 the cut through the ball hull along a great circle and so outlined that the axis 9 (S. 7 ) along the section. Entered are the distances between the ball center 22 and the sections 2 . 3 and 4 , The sections are just drawn, ie a spherical deformation due to the pressure inside the ball was not considered.

The radius r ₁₁ is the distance from the ball center 22 to the middle of the section 4 (Circular section); he is in the embodiment 107.5 mm. The distance r ₁₂ gives the distance between the ball center 22 and the middle of the section 2 (Annulus), in the embodiment, this radius is 107.2 mm. The radius r ₁₃ describes the distance from the ball center 22 to the middle of the section 3 and is 109.0 mm in the embodiment. r ₁₄ is the distance between Ball Center 22 and the connection point between the sections 2 and 4 ; the value is in the embodiment at 109.8 mm. The ratio between the largest and smallest radius - in the present case between the radius r ₁₄ and the radius r ₁₂ - gives again the (maximum) out-of-roundness of the ball cover 1 at; In the exemplary embodiment, the ratio is 1.024, ie the maximum radius is 102.4% of the minimum radius. This results in that the roundness of the ball is much larger than in the prior art ball according to 1 (106.7%).

Preferably, an embodiment is provided, wherein the radius R _{3 of} the section 4 between 15% and 45% of the (average) radius of the ball cover 1 is. Below the mean radius, the arithmetic mean of the in 11 understood four radii.

The inner radius R _{2 of} the section 2 is advantageously between 110% and 130%, preferably between 113% and 117% of the radius R _{3 of} the section 4 in the described embodiment with six sections 2 , At four sections 2 this value would preferably be between 118% and 122% of said radius.

The outer radius R _{1 of} the section 2 is preferably between 60% and 90%, more preferably between 70% and 80%, of the (average) radius of the ball cover 1 ,

The length L of the section 3 lies in the embodiment with six sections 2 preferably between 90% and 220%, in particular between 100% and 120%, of the (average) radius of the ball cover 1 , Become only four sections 2 provided, the length L is preferably between 180% and 220% of this radius.

The smallest width b of the section 3 is advantageously between 10% and 20%, preferably between 12% and 17%, of the length L of the section 3 ,

The The figures given are merely exemplary and can to change in other embodiments.

1

ball case

2

section

3

section

4

section

5

peripheral location

6

page

7

page

8th

axis

9

axis

10

transverse side

11

Just or circular arc

12

Just or circular arc

13

top

14

lateral limit

15

long side

16

end

17

end

18

mid-range

19

hexagon (Hexagon)

20

Pentagon (Pentagon)

21

Coincident point the seams

22

ball center

23

spherical zone

24

ball cap

α

angle

β

angle

R ₁

outer radius of the section 2

R ₂

inner radius of the section 2

R ₃

Radius of the section 4

L

Length of the section 3

B

largest width of the section 3

b

smallest width of the section 3

r ₀₁

radius

r ₀₂

radius

r ₀₃

radius

r ₀₄

radius

₁₁

radius

r ₁₂

radius

₁₃

radius

₁₄

radius

s

arc length

Claims (16)

Ball Sleeve ( 1 ), in particular for footballs, comprising a number of interconnected, in particular sewn, sections ( 2 . 3 . 4 ), characterized by a first group of substantially identically shaped sections ( 2 ) having a substantially circular shape, which is a ball cap of the ball cover ( 1 ), or substantially annular shape forming a ball zone of the ball cover ( 1 ), each with two adjacent sections ( 2 ) of the first group over each section ( 3 ) are connected to a second group of substantially identically shaped sections which correspond to one of the adjacent shapes of the sections ( 2 ) of the first group have adapted and elongated shape. Ball cover according to claim 1, characterized in that on the surface of the ball cover ( 1 ) evenly distributes at least four sections ( 2 ) of the first group are arranged. Ball cover according to claim 2, characterized in that on the surface of the ball cover ( 1 ) distributes six sections evenly ( 2 ) of the first group are arranged. Ball cover according to one of claims 1 to 3, characterized in that at least a part of the sections ( 2 ) of the first group, preferably all sections ( 2 ) of the first group, have a substantially annular shape and in the interior of the annulus concentric sections ( 4 ) of a third group having a substantially circular shape are arranged. Ball cover according to claim 4, characterized in that at least a part of the sections ( 2 ) of the first group, preferably all sections ( 2 ) of the first group, each one at a peripheral location ( 5 ) broken circular part are made, wherein the points of interruption facing ( 6 . 7 ) of the circular ring part connected to each other, in particular sewn, are. Ball cover according to claim 5, characterized in that the point of interruption in the flat and tension-free state of the section ( 2 ) of the first group over an angular range (β) between 20 ° and 130 °, preferably between 40 ° and 50 ° in six sections ( 2 ) of the first group and between 60 ° and 70 ° in four sections ( 2 ) of the first group extends. Ball cover according to claim 4, characterized in that at least a part of the sections ( 2 ) of the first group, preferably all sections ( 2 ) of the first group, are made of one each at a plurality, preferably at three or four, circumferential points interrupted circular ring part, wherein the points of interruption facing sides of the circular ring part connected to each other, in particular sewn, are. Ball cover according to claim 5, 6 or 7, characterized in that the outer radius (R ₁ ) of the part through the sections ( 2 ) of the first group formed annular part is at least twice the inner radius (R ₂ ) of the circular ring part. Ball cover according to one of claims 1 to 8, characterized in that the sections ( 3 ) of the second group are formed with an elongated shape strip-shaped. Ball cover according to one of claims 1 to 9, characterized in that each section ( 3 ) of the second group has a length (L) at least twice the largest width (B) of the section (B) 3 ) corresponds. Ball cover according to one of claims 1 to 10, characterized in that each section ( 3 ) of the second group with respect to two mutually perpendicular axes ( 8th . 9 ) is symmetrical. Ball cover according to one of claims 1 to 11, characterized in that each section ( 3 ) of the second group on both lateral sides ( 10 ) one of two straight lines or two circular arcs ( 11 . 12 ) formed tip ( 13 ) having. Ball cover according to claim 12, characterized in that the straight lines or circular arcs ( 11 . 12 ) to one of the axes ( 8th ) an angle (α) between 35 ° and 110 °, preferably between 40 ° and 60 °, more preferably between 47 ° and 49 ° at four sections ( 2 ) of the first group and between 56 ° and 59 ° in six sections ( 2 ) of the first group. Ball cover according to one of claims 1 to 13, characterized in that the lateral boundary ( 14 ) of the two long sides ( 15 ) of each section ( 3 ) of the second group is formed by an elliptical arc or by a circular arc. Ball cover according to one of claims 1 to 14, characterized in that the sections ( 3 ) of the second group in their end regions ( 16 . 17 ) have a greater width (B) than in their middle region ( 18 ). Ball cover according to claim 15, characterized in that the largest width (B) of each section ( 3 ) of the second group at least twice the smallest width (b) of the section ( 3 ) corresponds.