ANCHORING DEVICE AND METHOD FOR USE THEREOF
The invention relates to an anchoring device for preventing theft of cycles, motor bikes, boats and other objects which - without adequate measures - are easy to steal.
For the purpose of anchoring movable property to walls use is made in the prior art of eyes which are fixed to the wall by means of bolts. Such eyes have the drawback that they can be damaged by being broken off through bending.
In order to obviate such a drawback the present in¬ vention provides an anchoring device for coupling a ve¬ hicle, vessel and/or other movable property thereto for the purpose of preventing theft, comprising:
- a draw bolt comprising a thickened end part,
- a nut for tightening by means of the bolt,
- a flexible sleeve or a spreading element which can be expanded by means of the draw bolt and the nut,
- a coupling element freely rotatable round the draw bolt and comprising a fixing member for a blocking member for temporarily fixing the coupling element rela¬ tive to the draw bolt for the purpose of expanding the rubber sleeve or the spreading element.
Such an anchoring device according to the present invention has the advantage, among others, that engaging the coupling element by applying force thereto or by means of tools is difficult because it can rotate freely round the bolt. It hereby becomes time-consuming to break off the coupling member, which is quite simple in the case of the known eyes.
In a first preferred embodiment the coupling ele¬ ment of the anchoring device comprises a coupling member for coupling to a lock of the vehicle, vessel or other movable property. This has the advantage that the device
is simpler to manufacture due to the use of fewer compo¬ nents.
The anchoring device preferably comprises a cou¬ pling member for coupling to a lock of the vehicle, ves¬ sel or other movable property. This embodiment can be manufactured in simpler manner due to a relatively sim¬ ple mounting.
An embodiment comprising a closing ring for cover¬ ing the flexible sleeve or the spreading element in the position of use of the anchoring device has the advan¬ tage, among others, that the tensile forces that can be exerted on the spreading member can be distributed and that damage to the spreading member is prevented.
The use of a eutectic material or a thermoplastic with short melting range in the fixing member prevents that the bolt can be loosened when high temperatures are applied to the device, while in normal use an authorized person can however still remove the bolt.
The use of a spacer extending from the end part round a part of the bolt makes it possible to perform a free rotation in relatively simple manner.
A further aspect of the present invention relates to a method for providing an anchoring using a device according to one or more of the claims 1-10, comprising steps for:
- providing a hole in an anchoring, such as a wall, a quay, a floor or a beam,
- placing the anchoring device in the hole,
- placing the blocking member in the fixing posi¬ tion,
- fixedly clamping the anchoring device by tighten¬ ing the bolt in the nut,
- releasing the blocking member.
An advantage of such a method is that movable prop¬ erty can be anchored in firm manner as stated in the foregoing.
The invention is described in greater detail here- inbelow on the basis of preferred embodiments and with reference to the accompanying figures, in which:
FIG. 1 shows a cross-section of the torsion-free anchoring plug,
FIG. 2 shows a cross-section along the line A-A in figure 1,
FIG. 3 shows a side view of a further preferred em¬ bodiment,
FIG. 4 shows a side view of the embodiment of Fig. 3,
FIG. 5 shows a cross-section of the torsion-free central bolt connection in fitted position, and
FIG. 6 shows a cross-section of the embodiment of Fig. 5 slightly above the recessed-head screw 4.
A preferred embodiment according to the present in¬ vention (Fig. 1) relates to an anchoring device 20. Us¬ ing a locking screw 1 a bush 3 provided with flattened sides 2 is connected to shank 4 of tensioning bolt 5. By making use of open-end spanner 6 a torque is applied to bolt 5 by means of flattened portions 2, whereby by means of nut 7 the rubber sleeve 10 (or any other expan¬ sion sleeve) inserted into hole 8 in wall 9 is clamped fixedly therein. Locking screw 1 is then removed and there remains a wall anchor, in which the eye of cou¬ pling piece 12 is freely rotatable.
Mounted between bush 3 and bolt 11 is coupling piece 12, forming together with the bow or D shackle 13 fixed thereto a cardan joint with the relevant vehicle, optionally making use of an intermediate connection, for instance a chain or a linkage.
The clearance 14 for the purpose of the torsion- free construction is realized by means of spacing sleeve 15.
Round the bolt shank of the torsion-free anchoring plug is placed a bush provided with two flat sides which is provided for mounting purposes with a locking screw which prevents co-rotation when a torque is applied by means of an open-ended spanner.
As soon as the expansion element, such as for in¬ stance a rubber sleeve or a spreading piece, situated on the bolt shank has sufficient clamping force, the lock¬ ing screw is removed and the threaded hole is filled for instance with a blind plug.
From this moment the bush provided with two flat sides functions as a separate ring, freely co-rotating, and is therefore torsion-free. The connecting link is enclosed between this ring and the flat head of the bolt shank.
The vehicle can be connected to the connecting link by means of a lock. A closing plate 17 is placed between the expansion part and the bush for the purpose, among others, of a uniform distribution of the pressure force exerted on the expansion element. Such a closure also prevents damaging of the expansion element.
The embodiment of Fig. 5 is an anchoring device 40 comprising a bolt 39 which is provided with a disc¬ shaped head 33 with a flat side 30 on the periphery, to¬ gether with locking bolt 34 which serves during mounting to transfer sufficient clamping force by means of the eye nut 31 welded on recessed-head screw 36.
In addition to being embodied as drawn (with screw thread 32), eye nut 31 can also be embodied with a smooth tapped hole.
In both cases diverse theft prevention systems can be coupled to the eye nut.
The bolt head supports on spacing sleeve 37 which transmits the reaction force to washer 9.
The tap screw is removed after mounting and the threaded hole is filled or otherwise made unusable.
The plug is suitable not only as fixed point for locking cycles, motor vehicles and boats, but also for additional securing of doors, fences and so on.
The embodiment is realized by applying a bolt or screw having for instance a disc-shaped head, flattened on one side in order to enable fixation with a locking nut, wherein the torque exerted on the bolt forces the expansion element located round the shank to expand, or in order to realize direct screwing in of a wood screw.
In the embodiment, after insertion of spacing sleeve and bolt, the standing edge of the recessed-head screw is welded to an eye nut which, optionally using a tommy bar, transmits the torque to the bolt or the wood screw.
The present invention is described in the foregoing on the basis of preferred embodiments which do not limit the scope of protection of the rights sought. The rights sought are defined in the appended claims.