DE1578521C3

DE1578521C3 - Gymnastic play equipment in the form of a vertically clamped elastic rod

Info

Publication number: DE1578521C3
Application number: DE19661578521
Authority: DE
Inventors: Anmelder Gleich
Original assignee: Boggild, Robert; Dale, William L.; Cincinnati, Ohio (V.St.A.)
Priority date: 1966-02-08
Filing date: 1966-03-24
Publication date: 1977-01-20

Description

Halteringes 29 angreift. Diese untere Buchse 30 wird in ihrer Lage durch ein Abstandrohr 31 gehalten, das sich von der unteren Buchse aus nahezu bis zum oberen Ende des Mantels 25 erstreckt. Nahe dem oberen Ende des Abstandrohrs 31 ist eine obere Buchse' 32 angeordnet. Der obere Flansch 33 ist mit der Stirnfläche des Rohres 25 im Bereich 34 verschweißt. Der nach innen vorspringende Innenflanschteil 35, der die obere Buchse 32 teilweise überlappt, verhindert, daß diese Buchse nach oben herausfällt. Die Buchsen 30 und 32 dienen dazu, das untere Ende des Stabes 10 in einem Abstand von der Innenfläche des Abstandrohres 31 zu halten, so daß sich der zwischen diesen Buchsen liegende Teil des Stabes ungehindert durchbiegen kann, wie dies bei 10a strichpunktiert angedeutet ist.Retaining ring 29 engages. This lower bush 30 is held in place by a spacer tube 31, which extends from the lower bushing almost to the upper end of the jacket 25. Near the top of the spacer tube 31, an upper bushing 32 is arranged. The upper flange 33 is with the end face of the tube 25 is welded in the area 34. The inwardly projecting inner flange portion 35, the upper Bushing 32 partially overlaps, prevents this bushing from falling out upwards. The sockets 30 and 32 serve to keep the lower end of the rod 10 at a distance from the inner surface of the spacer tube 31 hold so that the part of the rod between these sockets can bend freely, as indicated by dash-dotted lines at 10a.

Die elastische Scheibe 23 und das Polster 28 sowie die Buchsen 30 und 32 bestehen aus einem Elastomermaterial, beispielsweise aus Gummi oder Polyurethan.The elastic disc 23 and the pad 28 as well as the Bushings 30 and 32 are made of an elastomeric material such as rubber or polyurethane.

Das wichtigste Bauteil der Halterung ist die aus Elastomermaterial bestehende obere Buchse 32, da sie bei der Benutzung des Stabes auf besondere Weise beansprucht wird. Diese obere Buchse muß eine ausreichende Abmessung in senkrechter Richtung besitzen, um den Flächendruck in einer allgemein radialen Richtung niedrig zu halten. Wenn der beim Durchbiegen des Stabes 10 aufgebrachte Flächendruck zu hoch wird, wird das Buchsenmaterial so stark zusammengedrückt, daß es hart wird und der Bewegung des Stabes einen Widerstand entgegensetzt, der einer starren Einspannung gleich käme. Unter diesen Umständen würde der Stab schon nach wenigen Durchbiegungen brechen. Andererseits muß die obere Buchse 32 eine ausreichende Steifigkeit besitzen, um zu verhindern, daß der Stab mit den Metallteilen der Halterung in Berührung kommt, denn auch in diesem Fall würde der Durchbiegung des Stabes ein zu großer Widerstand entgegengesetzt und der Stab bald beschädigt werden. Außerdem muß die Buchse 32 genügend flexibel sein, so daß sie die Bewegungen des Stabes beim Durchbiegen nicht zu stark behindert. Zwar muß die senkrechte Abmessung der Buchse genügend groß sein, um die Druckbeanspruchung niedrig zu halten, doch darf die Länge der Buchse auch nicht zu groß sein, denn wenn der Stab durchgebogen wird, könnte die Bewegung des Stabes in Richtung auf die Wand des Rohres 25 dazu führen, daß der untere Teil einer langenThe most important component of the bracket is the upper bushing 32 made of elastomer material, as it is stressed in a special way when using the stick. This upper socket must have a have sufficient dimensions in the vertical direction to keep the surface pressure in a general keep the radial direction low. If the surface pressure applied when the rod 10 is bent becomes too high, the bushing material is compressed so much that it becomes hard and the movement of the rod opposes a resistance that would be equivalent to a rigid restraint. Under these Under certain circumstances, the rod would break after just a few bends. On the other hand, the upper Bushing 32 have sufficient rigidity to prevent the rod from touching the metal parts of the Bracket comes into contact, because in this case too the deflection of the rod would be too great Opposed resistance and the rod will soon be damaged. In addition, the socket 32 must be sufficient be flexible so that it does not interfere too much with the movements of the rod when it is bent. It must vertical dimension of the bushing must be large enough to keep the compressive stress low, however the length of the socket must not be too long, because if the rod is bent, the Movement of the rod towards the wall of the tube 25 will cause the lower part of a long

ίο Buchse übermäßig zusammengedrückt wird, so daß er so hart wird, daß ebenfalls eine Beschädigung des Stabes zu befürchten ist.ίο socket is excessively compressed so that he becomes so hard that damage to the rod is also to be feared.

Um all diese Forderungen zu erfüllen, wird eine Buchse 32 aus einem Elastomermaterial mit einer großen Durometerhärte von 80 bis 90 vorgesehen und sie wird mit einer Querschnittsform laut Figur versehen. Diese Buchse weist auf ihrer Außenseite zwei Ringnuten 38 auf, die es dem Material bei der Druckbeanspruchung ermöglichen, zu fließen, so daß eine übermäßige Zusammendrückung und eine Beschädigung des Stabes vermieden wird. Die vorgesehene Querschnittsform der Buchse 32 gewährleistet auch, daß das Material in der gewünschten Richtung fließt. Dies gilt insbesondere für das obere Ende der Buchse. AnTo meet all of these requirements, a bushing 32 made of an elastomeric material with a large durometer hardness of 80 to 90 and it is provided with a cross-sectional shape as shown in the figure. This socket has on its outside two annular grooves 38, which it is the material in the Compressive stresses allow it to flow, causing excessive compression and damage of the rod is avoided. The intended cross-sectional shape of the socket 32 also ensures that the material flows in the desired direction. This is especially true of the top end of the socket. On

dieser Stelle verhindert die konische Stirnfläche ein Vorwölben des Materials unterhalb des Flansches 33, so daß an dieser Stelle ein Scheuern vermieden wird, das die Lebensdauer der Buchse stark verringern würde. Bei einem Stab mit einem Durchmesser von etwa 25 mm hat die Buchse 32 beispielsweise einen trapezförmigen Querschnitt, bei dem die radiale Höhe der Trapezform etwa 12,5 mm beträgt, die kleinere Basislinie eine Länge von etwa 22 mm und die größere Basislinie eine Länge von etwa 32 mm. Die Ringnuten 38 erstrecken sich über etwa zwei Drittel der Höhe des Trapezquerschnittes in die Buchse hinein.At this point, the conical end face prevents the material from bulging below the flange 33, see above that chafing is avoided at this point, which would greatly reduce the service life of the bushing. at a rod with a diameter of about 25 mm, the socket 32 has a trapezoidal shape, for example Cross-section in which the radial height of the trapezoidal shape is approximately 12.5 mm, the smaller base line a length of about 22 mm and the larger baseline a length of about 32 mm. The annular grooves 38 extend over about two thirds of the height of the trapezoidal cross-section into the socket.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

Patent claims:

1. Gymnastic play equipment in the form of a with its lower end vertically in a holding tube clamped elastic rod, characterized in that the inner diameter of the Holding tube (16) larger than the outer diameter of the rod (10) is that in the holding tube two elastic bushings (30, 32) are used, one of which at the lower end and the other is attached below the exit point of the rod from the holding tube and that the distance between the rod and the holding tube is so large that the bent rod according to its deflection on can bend the upper free end within the support tube without hindrance.

2. Game device according to claim 1, characterized in that the elastic bushings (30,32) in one without play in the holding tube (16) inserted tubular holder (15) and that the outer diameter of the sockets (30, 32) equal to that of the tubular holder (15) and the inner diameter is equal to that of the rod (10).

3. Game device according to claim 2, characterized in that the tubular holder (15) consists of a tube (25) and the upper sleeve (32) made of elastic material with a trapezoidal cross-section consists, whose narrower base on the outer surface of the rod (10) and whose wider base rests against the inner surface of the tube (25) and that the upper bush (32) has at least one annular groove (38) which extends from the the inner surface of the tube

(25) contacting surface extends radially inward from.

4. Game device according to claim 1 to 3, characterized in that with a diameter of the rod (10) of 25 mm, the radial dimension of the socket is about 12.5 mm, that the annular grooves are about ² Iz of the radial dimension of the socket ( 32) and the width of each ring groove is about 1.6 mm.

5. Game device according to claim 1 to 4, characterized in that the lower socket (30) a retaining ring (29) surrounding the lower end of the rod (10) is seated so that the lower end of the rod is seated an elastic pad (28) stands on a support ring welded to the end of the tube (25)

(26) rests with the base plate (27) arranged above it.

6. Game device according to claim 1 to 5, characterized in that at the upper ends of the The holding tube (16) and the tube (25) each have outwardly projecting flanges (22 and 23) welded on are that between these flanges an elastic disc (23) is arranged and that the flange (33) has an inwardly projecting inner flange portion (35) which partially supports the upper sleeve (32) overlaps ■

7. Game device according to claims 1 to 6, characterized in that a spacer tube in the tube (25) (31) is inserted, the length of which is equal to the distance between the lower edge of the upper socket (32) and upper edge of the lower bushing (30).

The invention relates to a gymnastic game device in the form of a vertical in one with its lower end Holding tube clamped elastic rod.

A game device of this type is known (DT-Gbm 19 21926). The holding tube is so in the ground sunk so that its upper end is flush with the surface of the earth. The elastic rod is in the holding tube with used firmly. As a result, the rod within the holding tube loses its elastic properties, and above all there is the risk that the rod will come out of the holding tube immediately at the exit end breaks off.

It is the object of the invention to provide that mentioned at the beginning

To improve play equipment so that its elastic properties are also preserved within the holding tube stay and its breaking off at the exit end from the holding tube is avoided.

This object is achieved according to the invention by the features of the characterizing part of the main claim.

In the holder according to the invention, the rod end within the holding tube can be between the both bearings bend and it can therefore reduce the elasticity of the rod along its entire length up to the bracket can be used. There is no concentration of the bending forces at the outlet end the holding tube, and breaks in the rod are therefore practically impossible. Further advantageous refinements the rod holder according to the invention emerge from the subclaims.

The invention is illustrated below with reference to a schematic drawing of an exemplary embodiment explained in more detail.

The figure shows a longitudinal section through the flexible holder 11 for an elastic rod 10, which is embedded in the ground, for example. The rod

10 stands a considerable length from this bracket

11 addition and allows a deflection compared to the Verticals of more than 45 ° up to 90 ° without permanent deformation. The rod 10 has, for example a total length of 2.4 m to 3.6 m and a diameter of about 19 mm to 32 mm.

The actual holder consists of a holding tube 16, which is fixed in the ground, for example a Gym is anchored or sunk into the ground. The holding tube 16 has a length of about 750 to 900 mm. It accommodates the actual tubular holder 15. With the upper end of the holding tube 16 is a ring 22 is welded, the upper end face of which is flush with the upper end of the sleeve. The ring 22 and the sleeve 16 are covered on the top by an elastic washer 23 made of rubber or plastic. On the disk 23 is supported by the tubular holder 15 via the flange 33. This prevents the rod rotates in the sleeve 16 and an even loading of the rod is achieved.

The tubular holder 15 comprises a tube 25, at the lower end of which a support ring 26 is welded. On this support ring 26 rests a base plate 27 which carries a pad 28 made of an elastomer material, so that the rod 10 can be supported on this pad 28. A retaining ring 29 is located at the lower end of the rod 10 attached, which prevents the rod from sliding out of the tube 25 upwards. The retaining ring 29 is with Press fit placed on the rod 10 or secured there by an adhesive.

In the lower region of the tube 25, a lower bush 30 is arranged on which the upper edge of the