DE3508931A1 - Springboard for gymnastics - Google Patents

Abstract

A springboard for gymnastics has a slightly curved headboard with a take-off surface and a bearing board of approximately the same length arranged below the headboard. The headboard and the bearing board are connected to each other at one of their ends at an acute angle, in the manner of a hinge. At the opposite end, the headboard and the bearing board are mutually spaced. Between the headboard and the bearing board is arranged, in the space between them, at least one spring element. The headboard and bearing board are supported thereby. The spring element has a substantially cylindrical shape and is arranged in a perpendicular plane between the support regions of the headboard and bearing board. The spring element extends approximately over the entire width of the headboard and of the bearing board. Furthermore, the spring element has an adjustable spring behaviour, for which purpose an apparatus for setting the spring behaviour is arranged on the spring element.

Description

SPRINGBOARD FOR EXERCISE

The invention relates to a springboard for gymnastics with a, a A slightly curved headboard with a take-off surface and an underneath, about the same length support board, with the headboard and the support board on yours one end hinge-like at an acute angle and being at the opposite end The end of the headboard and the support board are spaced apart, with between the headboard and the position board in their distance at least one spring element is arranged that supports the headboard and the board on.

Generic jump bays point between the jump area and A spring element is placed on the board, which is usually made up of an s or sinusoidal shape curved and firmly clamped between the take-off surface and the support board Plywood sheet is made as a spring leaf, e.g.

according to DIN 7915.

In a known springboard according to DE-PS 32 03 172 is an s - Or sinusoidal spring leaf between the headboard and the support board in the support areas arranged.

To create the same spring behavior as possible in an enlarged Jump weight area is proposed that in the support area between the Headboard and the spring leaf a spring element made of an elastically compressible Material is pushed in between, whereby its spring characteristic (under spring characteristic the ratio of load: spring deflection is understood here) softer than that of the springboard is without the spring element.

This measure is an improved spring behavior with a increased jump weight range achieved.

But the transition from one jump weight area to the other is rigid and not flowing, resulting in a kinked characteristic curve of the spring behavior results. This spring behavior, with a kinked characteristic curve, can despite the improvement not completely eliminating the dreaded ankle injuries in athletes.

The invention is based on the object of providing a springboard for gymnastics to improve so that the spring behavior of the spring element in all jumping weights - Areas is constant and the spring element is based on the weight of the user can be adjusted and the springboard being simple in construction and inexpensive can be produced.

This object is achieved according to the invention in that the spring element substantially cylindrical in shape and in a perpendicular plane between the support areas of the headboard and on board is arranged and wherein the spring element over almost the entire width of the headboard and the support board extends, and that the spring element has an adjustable spring behavior and that a device for adjusting the spring behavior is arranged on the spring element is.

Due to the adjustability of the spring behavior, the throwing force of the Jump surface optimally adapted to the weight of the gymnast. The adjustability of the Spring element ensures that with heavy and light-weight people, respectively the correct throwing power can be set.

Accidents caused by throwing too far or too short are avoided.

Due to the cylindrical shape of the spring element, which is in a vertical position Level is arranged between the support areas of the headboard and support board, the result is a spring behavior with a constant characteristic compared to the characteristic of the State-of-the-art springboard, the characteristic curve of which is kinked. A steady one Characteristic curve shows a soft course in the spring behavior, which is why ankle joint injuries be avoided.

In an inventive embodiment, the spring element can be at least be formed by a roller and horizontally between the headboard and the support board be arranged. It can have several rollers that are horizontally spaced from one another are arranged on a central shaft forming a spring element, the central Shaft through an axial central bore in which the respective roller is inserted. In In such a case, all of the rollers can be cylindrical. Here you can the reels made of an elastic material, preferably made of flexible polyurethane foam be educated. In addition, the entire spring element can be freely rotated and pivoted be attached to the board by means of a holding device.

Surprisingly, it has been found that a vertical Level arranged horizontally between the support areas of the headboard and support board roller-shaped, cylindrical spring element made of elastic material e.g.

Polyurethane soft foam that absorbs pressure forces evenly and just as evenly gives off the spring force again as it does with a spring leaf the state of the art is possible.

The holding device with which the spring element on the support board is freely rotatable - and pivotally attached, enables the spring element to the Support areas themselves do not have to be attached. The curved headboard can elongate unhindered under the action of the pressure forces.

This will prevent damage to the springboard.

In an advantageous embodiment, the holding device can consist of one U-shaped wire can be made, the holding device with half-shells is pivotally attached to the support board. In the event that the holding device Formed by a U - shaped wire, the long middle piece is between the two short ends bent at 900 angles represent the central shaft. On this The spring element formed by one or more rollers is inserted into the central shaft held.

But it is also possible to use the holding device in any other possible practical and inexpensive execution.

In a further embodiment, each roller can have one or more axial Have holes. Such axial bores are outside the central bore When arranging two axial bores, these will be in the same Arrange a radial distance from the central hole so that the center axis of all holes lie in one plane.

The two bores arranged coaxially to the central bore in the one or more rollers that form a spring element have the same surprisingly as with the arrangement of the spring element; that through these holes the spring behavior of the spring element can be changed.

The holes reduce the spring stiffness. This means that also vertical position in the case of bores arranged vertically one above the other the lowest for the respective support area of the headboard and support board Spring stiffness is achieved. When twisting the spring element at an angle 900 gives the highest possible spring stiffness. With this arrangement the elastic material is a solid material and can therefore have a greater compressive force take up.

The adjustment device can be used when the spring element is rotated Any spring behavior can be set continuously in the range from 0 - 90 °.

Advantageously, when several rollers are arranged on the Central shaft, the axial bores arranged at a radial distance from the central bore not be formed to the outer end of the respective roller.

This way a correction of the trajectory is achieved when the gymnast came up on the landing surface of the headboard to the side of the center line is.

Advantageously, in the support area, both on the headboard, as a protective covering can also be arranged on the board.

The protective covering prevents an "erasing effect" in the respective support area of headboard and support board.

This prevents damage. In addition, the protective film should allow easy adjustment of the spring element.

In a further embodiment of the invention, at one end of the central Shaft an adjustment wheel can be arranged, which can have an adjustment scale. as well the spring element can be provided with a clamping wheel for locking the central shaft be.

The setting wheel with the setting scale enables every gymnast to do this Adjust the springboard's spring behavior precisely to your body weight. That The clamping wheel prevents the spring element from rotating by itself.

Advantageous further developments and inventive designs result from the exemplary embodiment shown in principle below with reference to the drawing.

They show: FIG. 1: A side view of a diving board according to the invention in principle representation.

Figure 2: A side view of the spring element in the invention Arrangement between the support areas of the headboard and on the board and the Position of the spring element with minimum and maximum rigidity, in principle Depiction.

Figure 3: A longitudinal section through a spring element in partial view Figure 4: A side view of the holding device with setting wheel and scale, as well Pinch wheel.

A springboard 1 for gymnastics consists of a curved headboard 2 and a supporting board 4 of the same length arranged underneath. On the headboard 2, the jump surface 3 is arranged. The headboard 2 and the support board 4 are connected to one another in a hinge-like manner at one end 5 at an acute angle. At the opposite end 6 of the headboard 2 and the support board 4 both have Distance from each other. A spring element 7 is between the headboard 2 and the support board 4 arranged at their distance. It supports the headboard 2 and the in this area Support board 4.

The spring element 7 has a substantially cylindrical shape and is in a vertical plane between the support area 8 of the headboard 2 and the support area 9 of the support board 4 is arranged. The spring element 7 extends approximately over the entire width of the headboard 2 and the support board 4th An adjusting device 10 is provided on the spring element 7.

The spring element 7 is formed by at least one roller 11 which is arranged horizontally between the headboard 2 and the support board 4.

The roller 11 has an axial central bore 12 through the one central shaft 27 is stretched. The roller 11 has two, at the same radial distance, Axial bores 13 arranged outside the central bore 12.

Both axial bores extend over the entire length of the Rollers. The central axes 14, 15, 16 of the bores 12 13 lie in one plane.

In the support area 8 of the headboard 2 and also in the support area 9 of the support board 4, a protective covering 23 is provided. The protective covering can preferably consist of a polyamide film. The spring element 7 with its central shaft 27 and the roller 11 arranged thereon can be freely rotated and pivoted on the platform Position board 4 fastened by means of a holding device 17. The holding device 17 and is formed by two links 18 and a fastening element 19. There are those two links 18 are connected at one end to the end of the central shaft 27. A hanging device, not shown, at the other end of the link 18 is pivotable arranged on the fastening element 19.

The central shaft 27 has an adjusting wheel at one end of its shaft 20 with an adjustment scale 21. A clamping wheel 22 is for locking the central Shaft 27 provided. Details of the exact location of the adjustment device 10 can be seen from FIG. From this it follows that at one end the central Shaft 27 initially has a washer 24 on which a link 18 connects. Another washer 25 follows. This is followed by the dial 20 at.

The setting wheel 20 is non-rotatably with it by means of a countersunk screw 28 the shaft 27 connected. After another washer 26 is on a thread 29, the clamping wheel 22 is attached to the end of the shaft 27.

The setting of the spring behavior of the spring element. in relation the weight of the user can be seen from FIG. In the left partial drawing the position is shown in which the spring element 7 has the lowest spring stiffness having. In the right partial drawing, the spring element 7 assumes the position in which the spring element 7 has the highest spring stiffness. The adjustment range thus extends at an angle of 90 °. By twisting of Spring element 7 from 0 to 900 can now steplessly any spring behavior can be adjusted by changing the spring stiffness. Scale 21 contributes here corresponding markings that correspond to the user or the gymnast Provide clues. The marking can be determined by appropriate calibration will.

The scale division could, for example, have a weight range of Record 40 to 100 kg. It goes without saying that a greater tolerance is also possible capture.

Essential in the execution of the proposed diving board with adjustable spring behavior is that the spring element is approximately over the entire Width of the diving board extends.

With the proposed invention it is possible to create a stepping stone to improve so that the spring behavior of the spring element in all weight ranges is constant and that the spring element is adjusted to the weight of the user can be. This is possible because instead of the spring leaves that have been customary up to now now a roller-shaped cylindrical spring element is used. The spring element is horizontally in a vertical plane between the support areas of the headboard and arranged on the shelf. The use of elastic material is preferred of polyurethane for the production of the spring element ensures a uniform Absorption of the pressure forces and an equally uniform delivery of the spring force. the Arrangement of two, arranged at the same radial distance outside the central bore allow coaxial bores by turning the spring element at an angle From 0 - 900 a stepless adjustment of the spring stiffness and thus the spring behavior. An adjustment scale on the adjustment wheel facilitates operation.

The structure of the proposed diving board is through the use a flexible polyurethane foam roller designed more simply than with the previous ones used spring leaves was the case. As the raw material polyurethane is relatively inexpensive is and since such rollers can easily be sprayed and there continues to be the fastening mechanism for the spring element on the board is very simple, the proposed can Stepping stones can be manufactured inexpensively.

The cylindrical shape of the cylinder-shaped spring element, which is vertical Level is arranged between the support areas of the headboard and the support board, the result is a spring behavior with a constant characteristic. This results in a soft one Course in the springboard behavior of the springboard, this in turn has the consequence that the Dreaded ankle injuries can no longer occur.

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Claims (12)

CLAIMS 1. Springboard for gymnastics with one, a jumping-off area exhibiting, slightly curved headboard and one below, roughly the same long support board, with the headboard and the support board at one end are hinge-like connected to each other at an acute angle and being on the opposite side The end of the headboard and the support board are spaced apart, with between the headboard and the support board at least one spring element at a distance from them is arranged that supports the headboard and the support board, d a d u r c h g It is evident that the spring element (7) is essentially cylindrical Has shape and in a vertical plane between the support areas (8, 9) from the headboard (2) and on position board (4) is arranged and wherein the spring element (7) almost over the entire width of the headboard (2) and the support board (4) extends and that the spring element (7) has an adjustable spring behavior and that on Spring element (7) a device (10) for setting the spring behavior is arranged. 2. Springboard for gymnastics according to claim 1 d a d u r c h g e k e n n z e i c h n e t that the spring element (7) is formed by at least one roller (11) is and arranged horizontally between the headboard (2) and the on position board (4) is. 3. springboard for gymnastics according to one of claims 1 or 2 d a d u r c h g e k e n n n z e i c h n e t that several rollers (11), which are horizontal in the A spring element is arranged at a distance from one another on a central shaft (27) (7), wherein the central shaft (27) through an axial central bore (12), is inserted into the respective rollers (11). 4. springboard for gymnastics according to any one of claims 1 - 3 d a d u r it is noted that each roller has at least one axial bore, which is arranged outside the central bore 5. Springboard for gymnastics after one of claims 1 - 3 d a d u r c h g e k e n n n z e i c h n e t that each roller (11) two, at the same radial distance, outside the central bore (12), arranged, has axial bores (13) extending through the entire length of the roller (11), wherein the central axes (14,15, 16) of all holes (12, 13) lie in one plane. 6. springboard for gymnastics according to any one of claims 1-4 d a d u r c h g e k e n n n n e i c h n e t that all rollers (11) are cylindrical. 7. springboard for gymnastics according to any one of claims 1-5 d a d u r c h g e k e n n n z e i c h n e t that with an arrangement of several rollers (11) the central shaft (27), which are arranged at a radial distance from the central bore (12) axial bores (13) are not formed up to the outer end of the respective roller (11) are. 8. springboard for gymnastics according to any one of claims 1 - 6 d a d u r c h g e k e n n n z e i c h n e t that the rollers (11) are made of an elastic material, are preferably formed from flexible polyurethane foam. 9. springboard for gymnastics according to any one of claims 1 - 7 d a d u r c h g e k e n n n n z e i c h n e t that in the support area (7 + 9), both on the headboard (2) and on the support board (4) a protective covering (23) is arranged. 1O. Springboard for gymnastics according to one of claims 1 - 8 d a d u It is noted that the spring element (7) can be freely rotated and pivoted is attached to the support board (4) by means of a holding device (17). 11. Springboard for gymnastics according to one of claims 1 - 9 d a d u r c h g e k e n n z e 1 c h ri e t that at one end of the central shaft (27) a Adjustment wheel (20) is arranged, which has an adjustment scale (21). 12 springboard for gymnastics according to any one of claims 1-10 d a d u r c h g e k e n n n z e i c h n e t that the spring element (7) with a clamping wheel (22) is provided for locking the central shaft (27).