Abstract
The invention relates to a ground anchor with a mounting (1) for a parasol or the like, having a sleeve (8) which is pushed over the mounting (1) and on which stabilizers (9, 10, 11) are mounted that can be folded out in a radial or preferably tangential manner. A ground screw (4) is connected to the mounting (1) on the ground side and opposite the object to be supported, for example the parasol. A driver, such as a projection section, a shoulder, or a nut (12) which can be screwed onto the mounting for example, drives the sleeve (8) during the screw-in process and expands the stabilizers (9, 10, 11) against the ground. The mounting (1) can be angled relative to the ground screw (4) by 90 and thus forms a lever for rotating the ground screw (4). The stabilizers (9, 10, 11) can be pivoted onwards in a tangential manner selectively clockwise as well as counterclockwise to a limited degree as a result of stops (14, 15).
Claims
1. A ground anchor comprises: a holder for receiving a load and defining an axis; a ground screw on the holder; stabilizers for providing support against the ground; a sleeve rotatably supporting the holder so as to be axially displaceable in the holder; an abutment axially limiting movement of the sleeve on to the holder, the stabilizers being pivotal on the sleeve; and respective stops on the sleeve limiting pivoting of the stabilizers.
2. The ground anchor defined in claim 1, wherein the sleeve carries radial pivot pins for the stabilizers, and the stabilizers can be pivoted in respective planes that are tangential to the sleeve.
3. The ground anchor defined in claims 2, wherein the abutment that limits the displaceability of the holder relative to the sleeve is annular and formed as a nut screwed onto an external screwthread of the holder that entrains the sleeve during screwing-in of the holder or onto the holder and presses the spread stabilizers axially against the ground and pretensions them against the ground as the nut is tightened.
4. The ground anchor defined in claim 1, wherein the ground screw removably mounted on the holder so as to be exchangeable.
5. The ground anchor defined in claim 4, wherein the holder can be pivoted by 90° with respect to the ground screw and, in an angled position, forms a lever for screwing the ground screw into the ground.
6. The ground anchor defined claim 1, wherein the holder is of tubular cylindrical design and a screw or plug or clamp serves for connection to a pole, or for the peg of an eye for a tensioning rope.
7. A ground anchor comprising: a tubular and upwardly open holder defining an axis; a ground screw secured to a lower end of the holder and rotatable relative therewith about the axis; a sleeve fitted over the holder and rotatable about and movable along the axis on the holder; an upper abutment limiting upward travel of the sleeve on the holder; a plurality of stabilizer arms pivoted at respective radial axes on the sleeve; and respective pairs of stops on the sleeve and engageable with the stabilizer arms to limit pivoting of the arms.
8. The ground anchor defined in claim 7, wherein each pair of stops limits pivoting of the respective stabilizer arm to at most an angle of about 90° centered on a radial plane of the holder axis.
9. The ground anchor defined in claim 7, wherein the abutment is a nut threaded on the holder and rotatable to press the holder downward and push the stabilizer arms in to the ground.
Description
[0011] Embodiments of the invention are illustrated in the drawings, in which:
[0012] FIG. 1 shows a ground anchor with a holder for a parasol in the functional position,
[0013] FIG. 2 shows a top view with removed abutment with stabilizers folded out and angled counterclockwise,
[0014] FIG. 3 shows an alternative similar to FIG. 2 but with stabilizers folded out and angled clockwise, and
[0015] FIG. 4 shows a view with a folded-over holder as a handle for screwing of the screw into the ground.
[0016] According to FIG. 1, a holder 1 formed as a cylindrical tube has a hole 2 as a seat for a pipe 3, such as the pole of a parasol. Radial screws that secure the pipe 3 in the hole 2 are not shown. Instead of a pipe 3 or a pole, a peg having an eye as a fixing point for a guy can also be inserted. The holder 1 is equipped on its opposite, lower end with a positive connection (plug, snap, or screw connection) for a ground screw 4 or the like. In this embodiment, a slot 5 is shown that receives a head 6 of the ground screw 4 formed as a flat piece. A laterally removable pin 7 secures the head 6 in the slot 5. If the pin 7 is pulled out, then another screw or another anchoring element can be inserted that is suitable as a base for the ground type (dirt, sand, compacted material, concrete). FIG. 4 shows one possibility for the screwing-in of the ground screw 4 into the ground. The holder 1 is pivoted by 90° with respect to the ground screw 4. This is possible with the slotted connection shown here as an example, with the pin 7 forming the pivot axis. The holder 1 acts as a lever or hand grip that enables torque to be applied to the ground screw 4. As soon as the ground screw 4 has been screwed completely into the ground and is securely seated, the holder 1 is brought again into the position according to FIG. 1, a sleeve 8 with three stabilizers 9, 10, 11 is pushed over the holder 1, and a nut 12 is screwed onto an external screwthread of the holder 1 to lock it down. This nut 12 can be a wing nut. The stabilizers 9, 10, and 11 are hinged on the sleeve 8 by radial pivot pins 13 and can thus pivot in a vertical plane that is tangential to the sleeve 4. As shown particularly in FIG. 1, the pivot angle is limited by stops 14, 15. If the nut 12 is screwed vertically downward, then it presses the sleeve 8 downward and the spread stabilizers 9, 10, 11 against the ground. The friction between the nut 12 and the sleeve 8 can be reduced by means of a washer made of Teflon, for example, or by a ball thrust bearing. Nevertheless, residual torque is transferred to the sleeve 8, which is rotated slightly along until the friction of the stabilizers 9, 10, 11 against the ground is substantial and the sleeve 8 is rotationally stabilized. An equilibrium is then established between the supporting forces of the stabilizers 9, 10, 11 against the ground and the holding force of the ground screw 4 as well as of the tensile force of the nut 12, which results in a high level of static strength.
[0017] The embodiment according to FIG. 1 permits pivot angles of the stabilizers 9, 10, 11 in the clockwise direction and in the counterclockwise direction, as is shown in FIGS. 2 and 3.
[0018] The torque transferred to the sleeve 8 on screwing in the ground screw 4 and during the tightening of the nut 12 (direction of the arrow in FIGS. 2 and 3) is converted according to FIG. 2 into a sliding of the stabilizers 9, 10, 11 until a frictional connection is established. If the stabilizers 9, 10, 11 according to FIG. 3 are oriented in the counterclockwise direction, then the front faces of the stabilizers press against the ground like a pawl. For soft ground (for example sand), the variant according to FIG. 2 is advantageous, whereas the variant according to FIG. 3 is advantageous for a hard ground.
[0019] It should also be mentioned that, in the alternative of FIG. 4, the ground screw can be screwed in using a separate lever that is inserted into a cross bore through the holder 1. In this way, the stabilizers 9, 10, and 11 can also be tensioned against the ground. Instead of the nut 12, an abutment, such as an offset or a shoulder on the lateral surface of the holder, can be provided on the holder that abuts against the sleeve 8 when the ground screw 4 is screwed in and carries the latter along under simultaneous pretensioning of the stabilizers 9, 10, 11. The lever can be given a central place in the hole 2 when the pipe 3 is open at the bottom. Furthermore, the ground screw 4 can also be a threaded bolt that is anchored in the ground onto which the holder 1 is screwed.
