WO1996008603A1

WO1996008603A1 - Security bollard

Info

Publication number: WO1996008603A1
Application number: PCT/AU1995/000611
Authority: WO
Inventors: Stevan Miljkovich
Original assignee: Montana Bay Holdings Pty. Ltd.
Priority date: 1994-09-16
Filing date: 1995-09-15
Publication date: 1996-03-21
Also published as: AUPM824694A0

Abstract

A security bollard (1) comprising a barrier member (12) which is extendable from and retractable into a casing (14). A locking member (52) is pivotally mounted inside the barrier member (12). The locking member (52) has a foot (60) which retains the barrier member (12) in the extended condition. A lock (54) is provided to lock the locking member (52) from pivotal movement so that the barrier member (12) is locked in the extended condition. In an alternative arrangement, the casing (14) is replaced by a mounting plate (104) which supports the barrier member (12). The foot (105) of the locking member (52) engages with the mounting plate (104) and can be locked in position so that the barrier member (21) is locked in its upright condition.

Description

TITLE

"SECURITY BOLLARD"

FIELD OF INVENTION

The present invention relates to a security bollard.

The security bollard of the present invention may be used as a barrier to control access by vehicles to accessways.

In the context of the present invention accessways are to be understood to include entries to parking bays, parking-ways and parking areas in general, driveways, roadways, lanes, gateways, shop fronts, doorways and like vehicular movement areas.

BACKGROUND OF THE INVENTION

It is often necessary to limit or restrict the access of vehicles to accessways. Some such accessways are areas designated for the use of authorised vehicles only and it can be a great inconvenience should unauthorised vehicles gain access to such areas. An example of such an accessway is a parking bay that has been allocated for the exclusive use of an authorised vehicle(s) or user(s). If an unauthorised vehicle gains access to such a parking bay, it may be a great inconvenience and annoyance to the driver of the authorised vehicle who returns to find his/her allocated parking bay is occupied by an unauthorised vehicle.

Additionally, in recent times, criminals have used vehicles to ram commercial and other buildings to gain entry to the building. Often the driveways or shop fronts of such buildings are rammed with the vehicle, generally a stolen vehicle. The criminals, having gained access, are then able to steal money, merchandise, etc from the premises. Accordingly, this means that not only is property stolen, but costly damage is done to the building (and the vehicle). Unfortunately, conventional door and window locks are of no use in deterring criminals from engaging in such "ram raids" of buildings.

It is known to use security bollards to block off access to accessways such as parking bays and shop fronts. Some such security bollards are permanent fixtures and these are generally provided in front of shopfronts of commercial premises. Other prior art security bollards provide various arrangements whereby the bollard can be selectively placed into and out of an operative position. Such prior art security bollards are of varying forms.

One form of such a prior art security bollard is retractable and relies upon a long key member which is inserted through a top of the security bollard and pushed down towards a lower end of the security bollard to lock and unlock the security bollard so as to allow raising and lowering of the security bollard our of and into the ground. A problem of such security bollards is that relatively large and cumbersome keys must be used to operate the security bollards.

Other forms of prior art security bollards relate to pivoting security bollards which lie against the ground when not in use. A disadvantage of these security bollards is that the security bollard lies above the ground when not in the operative condition, presenting an encumbrance.

Whilst the formerly mentioned retractable prior art bollard does overcome this advantage, it does require that the bollard retracts into the ground when not in the operative condition. This requires excavation of the ground for installation which may not always be desirable or possible, eg in the case of installation in multistorey car parks.

Another form of prior art bollard attempts to address these problems by using a security bollard which is secured to the ground by a mounting plate. The security bollard can be unlocked and removed from the mounting plate for storage purposes. Hence, installation is easier and the mounting plate is relatively unobtrusive when in the storage mode. However, the locking mechanism of this security bollard is relatively weak and relies upon the close fitment of a pin in a hole. The pin is prone to bending which results in difficulty and unreliability in use of the security bollard.

SUMMARY OF INVENTION

In accordance with a first aspect of the present invention there is provided a bollard comprising:

a barrier member arranged to be placed in an operative substantially upright condition;

support means to support said barrier member in said substantially upright condition;

a locking member pivotally held in said barrier member, wherein said locking member is engageable with said support means and lockable to secure said barrier member in said substantially upright condition.

In accordance with a second aspect of the present invention there is provided a security bollard comprising:

support means installable in the ground in a substantially upright condition;

a barrier member moveable between an operative extended condition in which said barrier member extends from said support means and a retracted condition in which said barrier means is provided inside said support means; and

locking means having a first element located at a lower part of said barrier member and a second element located remotely of said first element; wherein said second element enables locking and unlocking of said first element such that when said first element is locked said barrier member is locked in said substantially upright condition.

The support means is provided in the form of a casing and the barrier member may be extended from and retracted into the casing.

In accordance with a third aspect of the present invention there is provided a security bollard comprising:

support means fixable to the ground, said support means having an opening;

a barrier member having plate means at a lower part receivable in said opening of said support means;

locking means having a first element located at a lower part of said barrier member and a second element located remotely of said first element,

wherein said second element enables locking and unlocking of said first element such that when said first element is locked said barrier member is locked in an operative substantially upright condition.

The support means is provided as a mounting plate, having a flange arrangement, with which the barrier member is engageable.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1 is a side view of an embodiment of a security bollard in accordance with the first and second aspects of the present invention;

Figure 2 is a side view of the locking member of the security bollard shown in figure 1 ; Figure 3 is a transverse sectional view of the casing of the security bollard shown in figure 1;

Figure 4 is a plan view of the guide ring of the barrier member of the security bollard shown in figure 1;

Figure 5 is a plan view of the stop ring of the barrier member of the security bollard shown in figure 1 ;

Figure 6 is a side view of an embodiment of a security bollard in accordance with the first and third aspects of the present invention;

Figure 7 is a plan view of the plate of the barrier member of the security bollard shown in figure 6;

Figure 8 is a side view of the locking member of the security bollard shown in figure 6;

Figure 9 is an underside perspective view of the mounting plate of the security bollard shown in figure 6; and

Figure 10 is an upper perspective view of the mounting plate shown in figure 9.

DESCRIPTION OF THE INVENTION

In figure 1, there is shown a security bollard 10 comprising a barrier member 12, a casing 14 to support the barrier member 12 and a locking mechanism 16 to lock the barrier member 12 in an operative (substantially upright) condition as will be later herein described.

The casing 14 is substantially tubular with a base 18. The casing 14 is arranged such that it is installable in the ground. The casing 14 is installable in the ground such that it is disposed in a substantially upright manner, as shown in figure 1. The casing 14 is provided with a plate 20 at its upper end, ie the end opposed to the base 18. The plate 20 has an opening therein through which the barrier member 12 is able to extend. A top plate 22 fits over the plate 20 of the casing 14. A washer 24 may be provided therebetween.

The top plate 22 and washer 24 are also provided with openings through which the barrier member 12 is able to extend.

The plate 20, top plate 22 and washer 24 are provided with holes (not shown) for connection bolts (not shown) to connect the casing 14 to the ground 26.

The casing 14 is provided with upright guide rails 28 disposed on the inside surface of the casing 14. The guide rails 28 are arranged substantially parallel to the longitudinal axis of the casing 14.

In figures 1 and 3, a pair of opposed guide rails 28 are shown. However, any suitable number and arrangement of guide rails may be used.

The guide rails 28 assist in guiding, supporting and steadying the barrier member 12 as it is raised out of and lowered into the casing 14, as will be later herein described.

The guide rails 28 extend from the bottom of the casing 14 to a distance spaced from its upper end. Thus, there is a spacing between the upper end of the casing 14 and the upper ends of the guide rails 28. This can be seen in figure 1. The guide rails 28 also enable the barrier member 12 to be locked in its extended condition, as will be later herein described.

The casing 14 is also provided with a support post 30 located inside the casing 14 at its lower part. The support post 30 comprises a stem 32, and a top plate 34 positioned above the stem 32. The stem 32 may be made from a resilient material, eg rubber, and the top plate 34 may be made from metal.

The support post 30 provides a support for the barrier member 12 to rest on when it is located in its retracted condition inside the casing 14. The stem 32, made of resilient material, provides a cushion should the barrier member 12 be allowed to fall under its own weight from its extended condition to its retracted condition.

The barrier member 12 is substantially tubular and is dimensioned such that it is able to slide into and out of the casing 14 (to its retracted and extended conditions, respectively).

The barrier member 12 has an upper part 36 and a lower part 38.

A handle 40 is provided at the upper part 36. The handle 40 is flush with the upper end of the barrier member 12 and a recess 42 is provided in the upper part 36 of the barrier member 12 beneath the handle 40. This allows a user to insert his/her hand into the recess 42, beneath the handle 40, and grasp the handle 40.

A guide ring 44 (shown separately in figure 4) is provided at the lower part 38 of the barrier member 12 adjacent its end. The guide ring 44 has recesses 46 which accommodate the guide rails 28. The guide ring 44 in cooperation with the guide rails 28 guides, supports and steadies the barrier member 12 as it is extended from and retracted into the casing 14. The guide ring 44 also prevents rotation of the barrier member 12 (about its longitudinal axis) when it is extended out of and retracted into the casing 14.

The barrier member 12 is further provided with a stop ring 48. The stop ring 48 prevents the barrier member 12 being completely withdrawn from the casing 14. The stop ring 48 is provided around the barrier member 12 at a location as will be later herein described.

The stop ring 48 is provided with truncated peripheral edges 50 which accommodate the guide rails 28 when the barrier member 12 is slid into and out of the casing 14.

The stop ring 48 abuts with the undersurface of the plate 20 to prevent the barrier member 12 from being completely withdrawn from the casing 14.

The stop ring 48 also steadies the barrier member 12 so that it does not wobble and remains substantially upright as it is raised out of and lowered into the casing 14.

The locking mechanism 16 comprises a locking member 52, a lock 54, a push bar 56 and a spring 58. Preferably, the lock 54 is key operated.

The locking member 52 is substantially elongate and extends substantially from the upper part 36 to the lower part 38 of the barrier member 12.

The locking member 52 is provided with a foot 60 extending substantially transversely therefrom at its lower end.

The upper part of the locking member 52 extends upwardly beyond the push bar 56 to form a finger-like projection 62. The push bar 56 extends substantially transversely from the locking member 52.

The locking member 52 is pivotally mounted inside the casing 14 via a pivot mount comprising a pivot pin 64 passing through a hole 66 in the locking member 52. The locking member 52 is pivotally mounted substantially midway along its length. The locking member 52 is pivotally mounted about a horizontal axis. The push bar 56 is provided with a notch 68 in which a tongue 70 of the key operated lock 54 is engageable.

The foot 60 forms a first lock element and the lock 54 forms a second lock element (remote of the first lock element) which is able to lock the first lock element to thereby lock the barrier member 12 in its extended substantially upright condition.

The foot 60 and lock 54 are provided on opposed sides of the pivot mount of the locking member 52.

An opening (not shown) is provided in the barrier member 12 such that the foot 60 of the locking member 52 may extend therethrough. The spring 58 biases the locking member 52 such that the foot 60 of the locking member 52 extends through this opening. In figure 1 , the direction of this bias is in the anti-clockwise direction.

The locking member 52 is of a length such that it does not extend to the lower end of the barrier member 12, but terminates a distance before the lower end thereof.

The spring 58 extends between the locking member 52 (at its upper part) and the interior wall of the casing 14.

The manner of operation and use of the security bollard 10 of the present invention will now be described.

The security bollard 10 may be installed in the ground 26 by first preparing a hole of suitable dimensions in the ground. The casing 14 is then inserted into the hole and concrete may be used to set the casing 14 in the hole. The barrier member 12 can be inserted into the casing 14 by unlocking the lock 54 to disengage the tongue 70 from the notch 68 and depressing the push bar 56 such that the locking member 52 pivots by way of the pivot mount against the bias of the spring 58. The locking member 52 then pivots in the clockwise direction as seen in figure 1 such that the foot 60 is drawn into the barrier member 12.

The barrier member 12 is then lowered into the casing 14 such that the recesses 46 of the guide ring 44 are aligned with the guides 28. Once the barrier member 12 has been inserted into the casing 14 such that the foot 60 of the locking member 52 is located inside the casing 14, the push bar 56 may be released such that the spring 58 acts to bias the locking member 52 in the anti-clockwise direction as viewed in figure 1 , ie the spring acts to pull the upper part of the locking member 52 toward the interior wall of the barrier member 12, such that the foot 60 extends through the opening in the barrier member 12. The barrier member 12 may then be lowered into the casing 14 until the foot 60 rests upon a guide rail 28. The washer 24 and the top plate 22 may then be passed over the top of the barrier member 12 and secured to the plate 20 of the casing 14 by passing bolts (not shown) through the apertures in the plate 20, the washer 24 and the top plate 22. This completes installation of the security bollard 10.

The security bollard may be moved to its non-operative condition by depressing the push bar 56. This causes the locking member 52 to pivot such that the foot 60 is drawn back into the barrier member 12. The handle 40 may be grasped and the barrier member 12 lowered into the casing 14 such that the lower end of the barrier member 12 rests upon the top plate 34 of the support post 30. In this non-operative condition of the security bollard 10, the barrier member 12 is retracted inside the casing 14. .

When it is desired to place the security bollard 10 into its operative condition, the handle 40 is grasped and the barrier member 12 is raised to extend it from the casing 14. This condition is shown in figure 1. As the barrier member 12 is raised up out of the casing 14, the foot 60 extends a short distance out of the opening in the barrier member 12 such that it abuts the guide rail 28 under the biasing action of the spring 58. When the barrier member 12 is raised to a sufficient height, the foot 60 extends out of the opening in the barrier member 12 and over the guide rail 28 under the biasing action of the spring 58. The handle 40 of the barrier member 12 can then be released so that it is supported by the foot 60 resting on a guide rail 28 of the casing 14. The barrier member 12 can be locked in its extended condition by inserting the appropriate key into the key operated lock 54 and turning so that the tongue 70 engages in the notch 68 in the push bar 56. The key can then be removed from the key operated lock 54. This locks or secures the barrier member 12 in the extended condition since the tongue 70 engaging in the notch 68 locks the locking member 52 since it prevents the locking member 52 from pivoting. This in turn prevents the foot 60 from being drawn back into the barrier member 12.

When it is desired to return the security bollard 10 to its non-operative condition, the key is again inserted into the key operated lock 54 and turned such the tongue 70 is disengaged from the notch 68. The push bar 56 can then be depressed whilst holding the handle 40. This causes the locking member 52 to pivot such that the foot 60 is drawn back into the barrier member 12. Since the foot 60 is then no longer supported by the guide rail 28, the barrier member 12 may be lowered into the casing 14 and the push bar 56 released.

In figure 6, there is shown a security bollard 100. The security bollard 100 is similar to the security bollard 10 and like numerals are used to denote like parts. The security bollard 100 differs from the security bollard 10 in that the ring 44 of the security bollard 10 is replaced by a plate or pad 102 in the security bollard 100; the casing 14 of the security bollard 10 is replaced by a mounting plate 104, having a flange arrangement, in the security bollard 100; the foot 105 in the security bollard 100 is of a different form from the foot 60 of the security bollard 10; and the locking member 52 of the security bollard 100 extends to substantially the lower end of the barrier member 12. Accordingly, the following description of the security bollard 100 will focus on the description of the parts of the security bollard 100 which are different from the security bollard 10. The remaining parts of the security bollard 100 will be understood to be the same as those of the security bollard 10 previously herein before described.

The plate 102 is provided at the lower end of the barrier member 12. The plate 102 transversely has lugs or ears 106 which extend from a main body portion 108 of the plate 102 beyond the lower peripheral edge of the barrier member 12. The plate 102 is also provided with a notch 110 intermediate a pair of lugs 106. The notch 110 extends in a radial direction from the peripheral edge of the plate 102 to a location near the middle of the plate 102.

The foot 105 of the locking member 52 of the security bollard 100 comprises an angled portion 112 having a toe portion 114 extending therefrom. The toe portion 114 is arranged substantially transverse to the length of the locking member 52. The toe portion 114 is able to extend beyond the lower peripheral edge of the barrier member 12 under the biasing action of the spring 58 on the locking member 52.

The mounting plate 104 comprises a substantially annular body with a central aperture 116. A ledge 118 is provided at the inner peripheral region of the mounting plate 104. The ledge 118 is provided with recesses 120. The recesses 120 accommodate the lugs 106 of the plate 102 of the barrier member 12. The portions of the ledge 118 between the recesses 120 form a flange arrangement.

Lugs 122 are provided on the undersurface of the ledge 18. The recesses 120 are provided intermediate respective pairs of lugs 122 such that the lugs 122 are provided closer to one of each pair of recesses 120. The mounting plate 104 is provided with holes 124 near its outer periphery 126 to receive bolts (shown in figure 6) for securely fixing the mounting plate 104 to the ground 26.

The manner of operation and use of the security bollard 100 shown in figure 6 will now be described.

In use, the mounting plate 104 is fixed to the ground 26 using bolts passing through the holes 124 into the ground 26. Typically, the portion of the ground 26 to which the mounting plate 104 is to be fixed is prepared as a concrete block.

Once the mounting plate 104 is in place, the barrier member 12 of the security bollard 100 is secured to the mounting plate 104 in the following manner. The locking member 52 is unlocked using the key operated lock 54 to pivot the tongue 70 out of the notch 68 of the push bar 56. The push bar 56 is then depressed so that the locking member 52 pivots about the pivot mount in a clockwise direction as viewed in figure 6. This retracts the foot 105 of the locking member 52 into the barrier member 12 such that it does not extend beyond the lower periphery of the barrier member 12. The lugs 106 of the plate 102 are then aligned with respective recesses 120 of the mounting plate 104. The barrier member 12 is then lowered such that the lower part of the barrier member 12 passes into the aperture 116 and the lugs 106 pass through the recesses 120. The barrier member 12 is then turned in a first direction about its longitudinal axis such that the lugs 106 of the plate 102 are engaged beneath the portions of the ledge 118 intermediate the recesses 120. The engagement of the lugs 106 beneath the ledge 118 supports the barrier member 12 in its operative substantially upright condition. The lugs 106 of the plate 102 will abut the lugs 122 of the mounting plate 104 which will prevent further axial turning of the barrier member 12 in the first direction. The push bar 56 is then released so that spring 58 biases the foot 105 through the notch 110 in the plate 102 such that the toe portion 114 extends beyond the lower peripheral edge of the barrier member 12 beneath a portion of the ledge 118 intermediate the recesses 120. The toe portion 114 of the foot 105 engages behind a lug 122. This prevents turning of the barrier member 12 in a direction opposite to the first direction since the toe portion 114 abuts against the lugs 122 presenting further turning of the barrier member 12.

In this way, the foot 105 of the locking member 52 is engageable with the mounting plate 104. Further, the lock 54 can be operated to turn the tongue 70 to engage in the notch 68 of the push bar 56. In this way, the use of the lock 54 ensures the toe portion 114 is locked in place beneath the ledge 118 to thereby lock or secure the barrier member 12 in the substantially upright condition since the locking member 52 is locked ie prevented from pivoting.

To remove the barrier member 12 from the mounting plate 104, the reverse of the above steps may be followed. Thus, the lock 54 is unlocked to enable the push bar 56 to be depressed. This causes the toe portion 114 to retract so that it does not extend beyond the lower peripheral edge of the barrier member 12. The barrier member 12 may then be turned (in the opposite direction for installation) about its longitudinal axis such that the lugs 106 of the plate 102 are again aligned with the recesses 120 of the mounting plate 104. The barrier member 12 can then be lifted free of the mounting plate 104 and stored.

The security bollard of the present invention is able to be locked and unlocked in the operative upright condition using a relatively small key.

Similarly, unlocking is also readily achieved such that the security bollard 10 can be retracted into its casing and the security bollard 100 can be removed from its support.

The security bollard 100 may be used in locations where excavation of the ground is not desirable or not possible. Modifications and variations such as would be apparent to a skilled addressee are deemed to be within the scope of the present invention.

Claims

1. A security bollard characterised in that it comprises:

support means to support said barrier member in said substantially upright condition; and

2. A security bollard according to claim 1 , characterised in that said locking member is provided with foot means engageable with said support means and lock means is provided for locking said locking member in a first position such that said foot means secures said barrier member in said substantially upright condition.

3. A security bollard according to claim 2, characterised in that said locking member is pivotally held in said barrier member via a pivot mount and said locking member is biased into said first position.

4. A security bollard characterised in that it comprises:

support means installable in the ground in a substantially upright condition;

a barrier member moveable between an extended condition in which said barrier member extends from said support means and a retracted condition in which said barrier means is provided inside said support means; and iocking means having a first element located at a lower part of said barrier member and a second element located remotely of said first element;

wherein said second element enables locking and unlocking of said first element such that when said first element is locked said barrier member is locked in said substantially upright condition.

5. A security bollard characterised in that it comprises:

support means fixable to the ground, said support means having an opening;

6. A security bollard according to any one of claims 1 to 4, characterised in that said support means comprises a casing.

7. A security bollard according to any one of claims 1 , 2, 3 or 5 characterised in that said support means comprises a mounting plate.

8. A security bollard according to claim 6, characterised in that guide means is provided inside said casing to guide said barrier member as it travels into and out of said casing.

9. A security bollard according to claim 8, characterised in that said guide means comprises guide rails extending along the wall of said casing in an upright manner.

10.A security bollard according to claim 8 or 9, characterised in that said barrier member is provided with a guide ring at its lower part, said guide ring having recesses to accommodate said guide means.

11. A security bollard according to any one of claims 6, 8 to 10, characterised in that stop means is provided to prevent said barrier member being extended completely out of said casing.

12.A security bollard according to claim 11 characterised in that plate means is provided at the upper part of said casing means, said plate means having an opening through which said barrier member is able to extend and said stop means is carried by said barrier member and arranged such that said plate means prevents said barrier member being extended completely out of said casing.

13.A security bollard according to claim 11 or 12, characterised in that said stop means comprises a ring provided around said barrier member.

14.A security bollard according to claim 13, characterised in that said ring is provided with truncated edge portions to accommodate said guide means.

15.A security bollard according to any one of claims 6, 8 to 14, characterised in that barrier support means is provided in the lower part of said casing for said barrier member to rest upon when the barrier member is in its retracted condition in said casing.

16. A security bollard according to claim 7, characterised in that said barrier member is provided with lower plate means at its lower part, said lower plate means being engageable with said mounting plate.

17.A security bollard according to claim 16, characterised in that said lower plate means is provided with lug means to engage with said mounting plate.

18.A security bollard according to claim 16 or 17, characterised in that said lower plate means is provided with notch means.

19.A security bollard according to claim 17 or 18, characterised in that said mounting plate is provided with an opening to receive said lower plate means and said lower part of said barrier member, and ledge means having recess means to receive said lug means of said lower plate means wherein said barrier member is rotatable such that said lugs are not aligned with said recess means and engage beneath said ledge means.

20.A security bollard according to claim 19, characterised in that at least one lug means is provided beneath said ledge means with which a said lug means is able to abut to prevent further rotation of said barrier member.

21. A security bollard according to any one of claims 6, 8 to 15, characterised in that said locking means comprises a locking member and said first element comprises foot means of said locking member and said locking member is pivotally held in said barrier member via a pivot mount wherein said locking member is biased such that said foot means engages with said casing to retain said barrier member in said extended condition.

22.A security bollard according to claim 21, characterised in that said foot means is able to extend through an opening in said barrier means to engage with said casing.

23.A security bollard according to any one of claims 6, 8 to 15, 12 or 22, characterised in that said foot means engages with said guide means of said casing.

24.A security bollard according to any one of claims 7, 16 to 20, characterised in that said locking means comprises a locking member and said first element comprises foot means of said locking member and said locking member is pivotally held in said barrier member via a pivot mount wherein said locking member is biased such that said foot means extends from said barrier member and engages with said mounting plate to retain said barrier member with said mounting plate in a substantially upright condition of said barrier member.

25.A security bollard according to claim 24, characterised in that said foot means engages beneath said ledge means of said mounting plate, wherein said foot means is arranged to be located behind lug means beneath said ledge means to prevent further rotation of said barrier member.

26.A security bollard according to any one of claims 3, 21 or 24, characterised in that said locking member is biased by resilient means extending from said barrier member to said locking member.

27.A security bollard according to claim 26, characterised in that said resilient means comprises a spring.

28.A security bollard according to anyone of claims 20 to 27, characterised in that said second element comprises a lock means engageable with a portion of said locking member to lock said locking member form pivotal movement via said pivot mount such that said foot means is locked to thereby lock said barrier member in said substantially upright condition.

29.A security bollard according to any one of claims 3, 6 or 7, characterised in that a lock means is provided which is engageable with a portion of said locking member to lock said locking member from pivotal movement via said pivot mount such that said foot means is locked to thereby lock said barrier member in said substantially upright condition.

30.A security bollard according to any one of claims 1 to 3, 6, 8 to 15, 21 to 23, or 26 to 29, characterised in that said barrier member is movable between an extended condition in which said barrier member extends from said support means in a substantially upright condition and a retracted condition in which said barrier means is provided inside said support means.