WO2010022752A1

WO2010022752A1 - Raising and rolling stand for a trampoline

Info

Publication number: WO2010022752A1
Application number: PCT/EP2008/007065
Authority: WO
Inventors: Kurt Hack
Original assignee: Eurotramp Trampoline - Kurt Hack Gmbh
Priority date: 2008-08-29
Filing date: 2008-08-29
Publication date: 2010-03-04

Abstract

The invention relates to a raising and rolling stand (2) for a trampoline (1), having a stand part which is mounted on rollers and comprises a guide. A guide element which can be fixed to the trampoline (1) is arranged in a vertically adjustable manner in the guide. The guide element has an adapter (8) in order to be fixed to the trampoline (1) and an actuating element for vertically adjusting the guide element. The guide element and the guide are coupled to each other via a hydropneumatic adjusting element. The actuating element provided is a crank (12) by means of which a gearwheel in engagement with a threaded rod (16) can be made to carry out rotary movements, wherein the threaded rod (16) is a component part of the guide element.

Description

Lifting stand for a trampoline

The invention relates to a lifting roll stand for a trampoline.

With Heberoll pedestals of the type in question storage and transport of trampolines is possible. Suitable for this are collapsible trampolines. In order to use such a trampoline for gymnastic exercises, the frame is unfolded, so that at this the hammock is stretched and ready to perform the gymnastic exercises. If the trampoline is no longer needed, it is folded up and stored on two lifting roller stands. The lifting roller stands are mechanically fixed on opposite sides of the trampoline with adapters. The folded components of the trampoline are oriented substantially in a vertical plane. The height of the trampoline can be raised or lowered by means of the lifting roller stands. Since the lifting racks have rollers on their undersides, the unit can be moved from the folded trampoline and the lifting roller stands forming the storage, if required.

Such systems are manufactured by Eurotramp. The lifting roller stand consists essentially of a stator part comprising a first, extending in the horizontal direction metallic support, at the ends längssei- term each one roller is mounted and attached to the upper side, extending in the vertical direction second metallic tubular support. On this support a lever is attached by means of a hinge, wherein the joint divides the lever into two lever arms. At the end of the longer first lever arm is a handle for operating the lever by an operator. son provided. At the end of the second lever arm is an adapter for attaching the lever to the trampoline. The adapter is in the form of a cylindrical tube piece which can be inserted into a hollow cylindrical receptacle on the trampoline. As soon as the adapter is inserted into the receptacle, the trampoline can be raised or lowered by swiveling the lever. In a lower and upper limit position while the lever can be secured in position by a securing bolt on the vertical support.

An advantage of this Heberollständer is that this has a very robust design and its operation is easy to carry out even by unskilled personnel. The disadvantage, however, is that for the operator, the actuation of the lever when lifting the trampoline with an undesirably high amount of force is connected, since the pressing takes place against the entire weight of the trampoline. Conversely, a lowering of the trampoline by means of the lever is associated with dangers, since then the entire weight of the trampoline rests on the lever. If this is suddenly released by the operator, the lever moves up unchecked. To secure against such uncontrolled movements of the safety pin, which must first be solved manually, or the lever can be pivoted from a limit position. According to the safety instructions attached to the lift stand, the operator has to operate the safety bolt with one hand and the handle of the lever with the other hand. However, if the operators ignore the existing safety instructions, it may happen that the operator inserts a hand between the vertical supports and the second lever arm when the lever is pivoted. If then the lever is moved too fast, it can cause injury to the operator by trapping the hand. The invention has for its object to provide a lifting jack stand of the type mentioned for trampolines, which can be operated easily and with little effort at high safety standards.

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 lifting roll stand according to the invention comprises a stand part mounted on rollers with a guide. In the guide a fixable on the trampoline guide element is arranged height adjustable. The guide element has an adapter for fixing to the trampoline and an actuating element for height adjustment of the guide element. The guide element and the guide are coupled via a hydropneumatic adjusting element. As an actuating element, a crank is provided, by means of which a standing in engagement with a threaded rod gear in rotational movements is displaceable, wherein the threaded rod is part of the guide member.

A significant advantage of the lifting stand according to the invention is that the crank is not only a simple and easy to use, but above all a safe lifting and lowering of the trampoline is possible. In contrast to an actuating element in the form of a lever, in the crank used according to the invention as an actuating element, there is no risk of injury from the crushing of body parts even when the actuating element is suddenly released. Due to the effective weight forces the crank runs while releasing one or two revolutions, but this is associated with no significant risk of injury, since due to the small dimensions of the crank there is no risk of pinching of body parts between the Heolollständer and the crank. With the hydropneumatic adjusting element, which is designed in a particularly advantageous embodiment in the form of a gas pressure spring, a considerable reduction in the force required when lifting the trampoline by means of the lifting roller stand is achieved because with the hydropneumatic adjusting element a counter-force acting against the weight of the trampoline counterforce is generated , Furthermore, the damping properties of the hydropneumatic adjusting element, in particular the gas spring, are advantageously utilized in the lifting roller stand according to the invention. These damping properties of the hydropneumatic adjusting element, or the gas pressure spring, prevent uncontrolled, rapid downward movement of the lifting roller stand in case of improper operation of the actuating element, whereby the risk of injury to the operating personnel in handling the lifting roller stand is further reduced.

To store a trampoline, two lifting racks are required, which are attached to opposite sides of the trampoline. The lift stand is designed so that it can be mounted on either side of the trampoline. Thus, only one design of the lifting roller stand for the storage of a trampoline is needed. Due to the height adjustability of the lifting roller stand, the trampoline can be stored at different heights at the lifting roller stands. Advantageously, a lower target position, in which the levers of Heberollständer be fixed by means of securing bolts, dimensioned so that the total height of the mounted on the Heberollständern trampoline are smaller than the heights of doors in buildings, so that the trampoline at the Heberollständern through such door - Openings can be pushed through.

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

Figure 1: Top view of a folded trampoline mounted on two Heberollständer. Figure 2: Top view of a lifting tool stand on a trampoline.

FIG. 3: partial sectional view of the lifting roller stand according to FIG. 2.

FIG. 4 shows a cross section through the lifting roller stand according to FIG. 2.

FIG. 1 shows a top view of a folded trampoline 1, which is mounted on two lifting roller stands 2. The trampoline 1 has a hinged frame, so that it can be folded after use as shown in Figure 1 so that the components of the trampoline 1 are oriented in a substantially vertical plane. In this case, the trampoline 1 is supported on opposite sides, in each case on a lifting roll stand 2, wherein these are formed identically. The Heberollständer 2 form a height-adjustable, mobile storage for the trampoline. 1

FIG. 2 shows a plan view of one of the lifting roller stands 2 arranged on the trampoline 1. FIG. 3 shows a partially sectioned illustration of this lifting roller stand 2.

The lifting roll stand 2 has a post part, which has a metallic, tubular support 3 running in the horizontal direction. At the longitudinal ends of the carrier 3, a roller 5 is mounted in each case by means of a rotary bearing 4. The rollers 5 rest on a support. By these rollers 5, the Heberollständer 2 is movably mounted on the support. As a further constituent part of the upright part, a metallic outer tube 6 is provided which is fixedly connected to the support 3 and forms a guide. The outer tube 6 is seated in the center of the carrier 3 on its upper side. The longitudinal axis of the outer tube 6 extends in the vertical direction. The outer tube 6 has an oval, in particular elliptical cross-section and is open at its top.

In the outer tube 6, a guide element is slidably mounted. The guide element consists of an inner tube 7, which also has an oval, having preferably elliptical cross-section. The outer dimensions of the guide element are adapted to the inner diameter of the guide so that the guide element is guided with little play in the guide. The upper part of the guide tube forming inner tube 7 protrudes beyond the top of the outer tube 6 forming the guide. Since the outer tube 6 and the inner tube 7 have a non-rotationally symmetrical, oval cross-section, the inner tube 7 is mounted against rotation in the outer tube 6, that is, it can not be rotated in the outer tube 6, but only moved in the vertical direction.

At the upper edge of the guide member is an adapter 8 for fixing the trampoline 1. The adapter 8 consists of a circular cylindrical metal part whose longitudinal axis extends in the horizontal direction, and which protrudes perpendicularly from a side surface of the tube 7. For coupling the lifting roller stand 2 to the trampoline 1, this adapter 8 is inserted into a hollow-cylindrical receptacle 9 on the trampoline 1.

At the top of the inner tube 7, a first headband 10 is hinged. At the bottom of the outer tube 6, a second bracket 1 1 is hinged. As can be seen in FIG. 2, the collapsed trampoline 1 is secured in position with these retaining clips 10, 11, that is to say secured against unwanted unfolding.

For actuating the lifting roller stand 2, that is to its height adjustment, a crank 12 is provided, which is rotatably mounted on a holder 13 on the outer tube 6.

The holder 13 with the crank 12 is shown in Figure 4, which shows the Heberoll- stand 2 in a cross-sectional view. The holder 13 consists of a U-shaped profile piece which is fixed to the outer tube 6. Preferably, the profile piece is welded to the outer tube 6. In the holder 13 is a Shaft 14 rotatably mounted at the longitudinal end of the crank 12 is fixed.

On the shaft 14 sits a gear 15. This gear 15 is in engagement with a threaded rod 16, which is part of the inner tube 7. The threaded rod 16 extends over a partial segment of the inner tube 7, the length of the partial segment being adapted to the maximum stroke of the lifting roller stand 2.

The gear 15 is fixedly connected to the shaft 14, so that this rotates upon actuation of the crank 12. Depending on the direction of rotation of the crank 12, the inner tube 7 is moved relative to the outer tube 6 up or down by the engagement of the gear 15 with the threaded rod 16, that is, the upper part of the inner tube 7 is extended from the outer tube 6 or retracted into this. Thus, by operating the crank 12, the attached with the adapter 8 trampoline 1 can be raised or lowered.

The upward movement of the inner tube 7 upon actuation of the crank 12 is assisted by a hydropneumatic adjusting element. The hydropneumatic adjusting element is formed in the present case by a gas pressure spring 17. The gas pressure spring 17 comprises a pressure cylinder 18, in which a piston, not shown, is guided. The piston is followed by a piston rod 19, which projects beyond the underside of the pressure cylinder 18. The piston rod with the piston extends coaxially to the longitudinal axis of the pressure cylinder 18th

The pressure cylinder 18 is located in the interior of the outer tube 6 and is fixed there to a perforated plate or the like by means of a fastening means. The opening at the top of the pressure cylinder 18 piston rod protrudes into the interior of the inner tube 7 and is fixed there to the inner tube 7. Due to the resilient action of the gas spring 17 is an upward Force exerted on the inner tube 7, whereby the lifting movement of the trampoline 1 is supported upon actuation of the crank 12.

As can be seen from FIG. 3, a sliding element 20 made of polyamide or the like is provided at the lower end of the inner tube 7. This sliding element 20 ensures good guidance of the inner tube 7 on the inner wall of the outer tube 6.

As can be seen from FIG. 2, a securing bolt 21 is provided at the upper end of the outer tube 6, by means of which the inner tube 7 can be fixed in predetermined set positions on the outer tube 6. In the present case, three such desired positions are provided. For fixing the inner tube 7 in one of the desired positions, the securing bolt is locked in one of three holes 22, 23, 24 in the inner tube 7, which are shown in FIG.

The diameters of the holes 22, 23, 24 for specifying the desired positions of the inner tube 7 are preferably adapted to the outer diameter of the securing bolt 21 so that it is free of play or play in one of the holes 22, 23, 24.

If the gas pressure spring 17 is designed such that its deployment force is greater than the weight of the trampoline 1, the hole 22 for specifying the upper setpoint positions of the guide element can be dispensed with in principle, since this is determined by the maximum deflection of the gas pressure spring 17.

If the trampoline 1 is dismantled after use, then the Heberollständer 2 with the respective guide element in the middle target position, that is inserted in the latched in the hole 23 securing bolt 21 by importing the adapter 8 into the hollow cylindrical receptacle 9. Then, the guide elements of the Heberollständer 2 are introduced into the upper target position by the locking pins 21 are engaged in the holes 22. In this position, the trampoline 1 is completely folded. The composi- The elements of the trampoline 1 are then secured in position with retaining clips 10, 11 on the lifting roller stands 2, as shown in FIG. The trampoline 1 is then movably mounted on the lifting roller stands 2. In order to be able to move the trampoline 1 through door openings, it can be lowered at the lifting roller stands 2 into the lower setpoint position by locking the securing bolts 21 into the holes 24.

LIST OF REFERENCE NUMBERS

(I) Trampoline (2) Lifting stand

(3) carrier

(4) pivot bearing

(5) role

(6) Outer tube (7) Inner tube

(8) Adapters

(9) Recording

(10) headband

(I I) retaining bracket (12) crank

(13) bracket

(14) wave

(15) gear

(16) Threaded rod (17) Gas spring

(18) impression cylinder

(19) Piston rod

(20) Sliding element

(21) Locking bolt (22) Hole

(23) hole

(24) hole

Claims

claims

1. lifting roll stand for a trampoline with a roller mounted on the stand part, which comprises a guide in which a trampoline fx-adjustable guide element is height adjustable, which has an adapter for fixing to the trampoline, and with an actuating element for height adjustment of the guide element, characterized in that the guide element and the guide are coupled by means of a hydropneumatic adjustment element, and in that a crank (12) is provided as the actuating element, by means of which a toothed wheel (15), which is in engagement with a threaded rod (16), can be set in rotary motion, wherein the threaded rod (16) is part of the guide element.

2. lifting roll stand according to claim 1, characterized in that the crank (12) is mounted with the gear (15) on a holder (13) on the guide.

3. Lift stand according to one of claims 1 or 2, characterized in that the guide is formed by an outer tube (6), in which a guide element forming the inner tube (7) is guided against rotation.

4. Lift stand according to claim 3, characterized in that a segment of the inner tube (7) forms the threaded rod (16).

5. Lifting stand according to one of claims 1 to 4, characterized in that the hydropneumatic adjusting a Gasdruckfe- (17) which has a pressure cylinder (18) and a piston with a piston rod (19).

6. Lift stand according to claim 5, characterized in that the piston rod (19) of the gas spring (17) with the inner tube (7) is connected and the pressure cylinder (18) is connected to the outer tube (6).

7. Lifting stand according to one of claims 1 to 6, characterized in that the hydropneumatic adjusting element supports the upward movement of the guide element in the guide.

8. Lifting roll stand according to one of claims 1 to 7, characterized in that the guide element in the guide by latching means in predetermined nominal positions can be flattened.

9. Lifting stand according to claim 11, characterized in that a locking pin (21) is provided as latching means on the guide, and in that in the guiding element forming the inner tube (7) in predetermined heights holes (22, 23, 24) are incorporated in which the

Locking pin (21) can be latched.

10. Lifting roll stand according to one of claims 1 to 9, characterized in that the adapter (8) has a circular cylindrical shape and opens at the upper end of the guide element, and that the adapter (8) in a hollow cylindrical receptacle on the trampoline (1) can be introduced ,

11. Lift stand according to one of claims 1 to 10, characterized in that on the guide element and the guide in each case a headband (10) for fixing the position of the trampoline (1) is provided.

12. Lifting stand according to one of claims 1 to 11, characterized by its multiple arrangement, wherein two Heberollständer (2) on opposite sides of a trampoline (1) are fixable.