Barrier bollard, and method for actuating a barrier bollard

Abstract

The invention relates to a barrier bollard having a main part, a drive and a barrier part, wherein the movement of the barrier part relative to the main part is at least temporarily slowed down and / or interrupted when the threshold load is reached and / or exceeded. The invention furthermore relates to a method for moving a barrier bollard.

Description

Bollard and method for moving a bollard

[0001] The invention relates to a bollard with a base body, a drive and a blocking body, wherein the base body is connectable to the ground and the blocking body is arranged on the base body so as to be movable by means of a drive power of the drive along a direction of movement over a blocking height against an operating load between an open position and a blocking position, an upper side of the blocking body in the open position is substantially flush with a surface of the base body which is substantially flush with the ground and the blocking body is moved out of the ground in the blocking position so that the upper side of the blocking body protrudes above the base body at the blocking height, wherein a safety device for controlling the drive power is assigned to the drive,The activated safety device at least temporarily reduces the drive power when the operating load increases and a limit load is reached, so that the movement of the blocking body relative to the base body is at least temporarily slowed and / or interrupted when the limit load is reached and / or exceeded. Furthermore, the invention relates to a method for moving such a bollard.

[0002] Known bollards, in which a blocking body is designed to be movable relative to a base body made of, for example, a subsoil, are often the They are exposed to environmental influences and can therefore be restricted in their movement, for example by ice buildup or frozen snow, sand, or dirt. For example, the barrier body freezes relative to the base body at a corresponding contact point with the environment.

[0003] In contrast, a bollard should, for example, be equipped with a safety device in accordance with standard industry guidelines or a necessary risk analysis, but particularly to protect people. This device reduces or shuts off the drive power if, for example, a person is standing on the bollard or, in certain cases and for certain bollard designs, there is even a risk of a limb or foot being trapped. This can be achieved, for example, by means of a force sensor, a pressure sensor, or another similarly effective means.However, these safety devices also mean that a bollard cannot be extended in the event of frost, sand ingress or other contamination or even corrosion, for example after a long interruption in use, due to the resulting increased mechanical resistance, because the ice, accumulated sand or contamination exerts increased resistance on the barrier body and thus leads to the intervention of the safety device.

[0004] In this context, it is known to equip the bollard with a mostly electrically operated heating to be equipped with a device that, for example, heats a contact ring between the locking body and the base body. While this makes it possible to defrost ice, it only uses electrical energy, which is lost along with the generated heat at low ambient temperatures.

[0005] General bollards with electric drives are also known. For example, FR 2 659 995 A1 discloses such a bollard with an electric drive. In this bollard, the drive is designed so powerful that frost or snow, or jamming of the bollard, can be overcome by the drive power. However, no safety features are provided.

[0006] US 3,963,363 A discloses a bollard that can be moved between a lower and an upper position by means of a spindle drive and limit switches. The bollard only has a safety device to prevent damage to vehicles parked above the bollard.

[0007] DE 196 09 148 A1 discloses a hydraulic bollard, wherein the bollard can be fixed in an upper end region by means of a pressure build-up.

[0008] The object of the invention is to improve the state of the art.

[0009] The task is solved by a bollard with a base body, a drive and a blocking body, whereby the base body can be connected to the ground and the A locking body is arranged on the base body so as to be movable by means of a drive power of the drive along a direction of movement over a locking height against an operating load between an open position and a locking position, an upper side of the locking body in the open position is substantially flush with a surface of the base body which is substantially flush with the ground, and the locking body is moved out of the ground in the locking position so that the upper side of the locking body protrudes above the base body in the locking height, wherein the drive is assigned a safety device for controlling the drive power, wherein the activated safety device reduces the drive power at least temporarily when the operating load increases and a limit load is reached,so that the movement of the locking body relative to the base body is at least temporarily slowed down and / or interrupted when the limit load is reached and / or exceeded, wherein the safety device is deactivated within an initial height, wherein a movement of the locking body by means of the drive power by means of the deactivated safety device is possible despite reaching and / or exceeding the limit load, in particular up to a maximum limit load, within the initial height.

[0010] The core idea of ​​the invention is that a safety device is deactivated within an initial height so that a movement of the locking body by means of the drive power and by temporary Releasing an otherwise inadmissible drive power by means of the deactivated safety device is possible despite reaching and / or exceeding a limit load within the initial height.

[0011] This prevents, for example, the barrier from trapping or otherwise damaging people, limbs, or objects outside of the initial height. Within the initial height, and thus within a range of motion in which damage is geometrically impossible or highly improbable as described above, the barrier can still break free against temporary resistance. This allows for safe, yet technically reliable, and trouble-free operation of the bollard with respect to people and objects in the vicinity of the barrier.

[0012] Furthermore, the operation of the bollard can be carried out very conveniently, since, for example, maintenance intervals, cleaning or breaking off ice or snow can be omitted, since the bollard can carry out the necessary measures, for example breaking off ice or snow, automatically and independently of maintenance personnel or operating personnel due to the design of the safety device and an associated temporary, position-dependent deactivation of the same, without restricting safety.

[0013] It should be mentioned in this regard that the bollard according to the invention can be embedded in a subsurface in an installed position in such a way that the upper side of the blocking body in the open position is essentially flush with a surface of the base body that is essentially flush with the subsurface. At the same time, this surface is then flush with the subsurface depending on the installation position of the bollard, so that overall, when the blocking body is in the open position, a substantially flat surface is created. However, the bollard according to the invention can be manufactured and provided separately from the subsurface in that the upper side of the blocking body is flush with the surface of the base body when the open position is reached.

[0014] The following terms are explained in this context:

[0015] A "bollard" is a technical device for blocking and opening traffic areas for cars and / or pedestrians, for example. A "base body" is provided, for example, as a pot-shaped or tube-like basic structure of the bollard, so that a "blocking body" designed, for example, as a movable bollard or movable post can be moved up and down within the base body. The blocking body is, for example, round or square in cross-section or has an oval or rectangular cross-section and slides up and down in the base body of the bollard when installed.

[0016] For this purpose, a "drive" is used, whereby the drive can be implemented, for example, by means of an electric motor, by means of a spindle drive, by means of hydraulics, pneumatics or another linear drive.

[0017] The base body can be connected to the "subsurface," meaning it can be embedded into a ground surface, such as a parking area. For this purpose, the base body can be embedded into the subsurface, paved, or even encased in concrete, depending on the resistance the bollard is expected to withstand during later operation.

[0018] If a "drive power", i.e. a force provided by the drive, is applied to the locking body, the locking body slides along a "direction of movement", i.e. in particular along a vertical axis within the base body.

[0019] In a fully extended or partially extended position, a "locking height," i.e., an upper end height of the locking body, can be achieved. The locking height specifically refers to the possible movement path of the locking body along the direction of movement.

[0020] An "operating load" refers to a load that occurs, for example, due to friction, internal resistance or other technical boundary conditions, against which the drive power of the drive works.

[0021] The blocking body can be moved into an "opening position" and a "blocking position". In the opening position, the path is cleared for persons and / or vehicles, while the blocking position refers in particular to the extended position of the blocking body and thus, in the blocking position, the blocking body blocks a passage.

[0022] In the open position, an "upper side" of the barrier body, i.e. an upper end surface of the barrier body, is in particular flush with a "surface" of the base body. This surface refers in particular to an upper end surface of the base body, which is intended, for example, as an inlet plate for paving or another surface fixing. In particular, this surface is essentially flat. Once the barrier bollard is installed, this surface is essentially flush with the ground, i.e., for example, the surface of a parking lot or a cycle path.

[0023] In contrast, the blocking body is moved out of this substrate in the blocking position, so that the upper side of the blocking body then protrudes at the blocking height above the base body and thus in particular also above the substrate.

[0024] A "safety device" refers in particular to a control or circuit for the drive, for example, whereby the safety device specifically takes on the task of reducing the drive power of the To be able to dose and thus control the drive. In particular, the safety device also has a measuring device for measuring the drive power and / or the operating load, so that feedback about the applied operating load is possible to the safety device.

[0025] Whilst the operating load refers to a load on the drive that occurs at specific points and which varies, a “limit load” refers to a permissible load, for example, which is set to protect bystanders or, for example, vehicles and at which the safety device then switches off or temporarily decouples the drive, for example, so that a person standing on the bollard, in particular on the barrier body, is detected and injury to this person is ruled out by switching off the drive. This limit load can, for example, be selected or designed based on the weight of an average person, a load below a damage limit of a vehicle or similarly.

[0026] "Reaching" the limit load refers to the presence of the specific value of the limit load, whereas "exceeding" refers, for example, to an additional increase in the limit load within the control time of the safety device. Such an exceedance can, for example, briefly exceed the specified limit load and can also be taken into account within the safety device.

[0027] The safety device can then slow down or even interrupt the movement of the locking body, in particular the control of the drive. An “initial height” here refers in particular to a partial height of the locking height, whereby this initial height is arranged in particular in a partial area of ​​the locking height facing in the direction of the opening position. The initial height has, for example, a height of 1%, 2%, 5% or even 10% of the locking height, whereby according to these examples this refers to a partial path of movement of the locking body relative to the base body in the lower area of ​​the locking body close to the ground. According to the invention, within this initial height, i.e. within a height at which any danger to persons is excluded or very unlikely due to the geometric conditions, movement of the locking body is possible despite the limit load being reached and / or exceeded.In particular , the safety device is deactivated if , for example , within the initial height of 5 cm above the ground , it is impossible for a person 's foot to be permanently damaged .

[0028] In order to enable the locking device to break free, for example in the event of a blockage of the locking device due to frost or snow, the safety device can be repeatedly deactivated within the initial height while moving and reaching the limit load, whereby a movement of the locking device by means of the drive power with repeatedly deactivated safety device despite repeatedly reaching and / or exceeding the limit load within the initial height, wherein the movement and / or attempted movement of the locking body is made possible in particular by means of a stepwise increase in the drive power between the individual deactivation processes, in particular up to a maximum limit load.

[0029] For example, a multiple, i.e. "recurring" reaching or even brief exceeding of the limit load caused by the delays in the control interventions can be tolerated, provided that the locking body is arranged within the initial height. A "stepwise increase" refers, for example, to an increase in the drive power within a maximum permissible limit load, which is referred to as the "maximum limit load", so that, for example, limit loads below the maximum limit load are gradually increased and stored as reference values ​​within the safety device and thus, for example, a three-fold, four-fold or even five-fold approach to the respective gradually increased limit load can be used in accordance with the stored values ​​to initiate a movement of the locking body below the maximum limit load.In particular, when the maximum load limit is reached in a recurring test, the drive is switched off permanently or for a certain period of time.

[0030] In one embodiment, the drive is assigned a load sensor and / or a load increase sensor, wherein the drive power is determined as a function of a measured drive load and / or a measured Drive load increase is regulated and in particular the deactivation of the safety device is prevented when the maximum limit load is reached and / or exceeded.

[0031] A "load sensor" refers, for example, to a sensor for determining the operating load of the blocking body, although indirect measurement can also be used here. For example, a load sensor can be implemented in such a way that an operating current of the drive is measured in the case of an electric drive. Likewise, a hydraulic pressure in a hydraulic system for operating the bollard can be measured in order to determine a load on the blocking body. Likewise, a "load increase sensor" is used, which can be implemented, for example, by reading out the edge steepness of a load sensor. Depending on the design of the drive, other, technically feasible versions for a load sensor or a load increase sensor can also be used, whereby the load increase sensor in particular can be implemented by evaluating a load sensor.

[0032] The load sensor can be used, for example, to detect when a limit load or the maximum limit load has been reached, whereby a load increase sensor, in particular by evaluating corresponding sensor values ​​or drive values, also allows a prediction of the imminent reaching of the maximum limit load, for example.

[0033] For example, in order to prevent the safety device from being accidentally deactivated without the actual possibility of the locking body freezing, a temperature sensor can be assigned to the drive, whereby the safety device can be deactivated when the measured temperature falls below, for example, 5 ° C, 3 ° C, 1 ° C or 0 ° C and remains activated when this temperature is exceeded.

[0034] For example, at a temperature below 3°C, the probability of the barrier freezing in the base body can be determined, and only then can the safety device be deactivated. If, for example, the limit load is detected at an ambient temperature of 10°C, it is physically improbable or even impossible that this signal was reached due to the barrier freezing and that, instead, the barrier is actually being blocked by a person, for example. This can further increase the safety of the bollard.

[0035] In one embodiment, the safety device is deactivated when moving from the open position to the locked position and / or when moving from the locked position to the open position within the respective initial height.

[0036] It should be noted that the "initial height" can also, alternatively or additionally, be determined within an upper range of the movement of the Locking body can be configured if, for example, the locking body is to be broken free from the locking position, i.e., in an upper position of the locking body. As described above, the invention can basically be used for an initial height in the floor area, although what has been described can also be implemented analogously for an initial height in the upper area of ​​the locking body, starting from the locking position in the direction of retraction.

[0037] In particular, the safety device is then only used to break free the barrier body, so that, for example, safety can be ensured when the barrier body is fully retracted into the base body if, for example, a passerby places a foot underneath a cover cap of the barrier body and this foot gets trapped, or if, for example, a foot gets trapped due to friction of a shoe sole on the outside of the moving barrier body. It should be noted in this regard that, although cover capping as mentioned here is not permitted under current guidelines and pinching points are to be avoided by design, a corresponding scenario must be taken into account when retrofitting corresponding barrier bollards with a range of functions according to the invention.The same applies to an initial height before or when reaching the locking position; here it is only possible to deactivate the safety device in the direction of retraction of the locking body, so that, for example, in an upper area of ​​the locking body, further extension is not possible. For example, the last few centimeters are no longer possible if the locking body is blocked by a vehicle, for example.

[0038] If the drive is hydraulic, the safety device can be deactivated using a hydraulic valve, which allows for a temporary lowering and / or releasing of hydraulic pressure for the drive. For example, the "hydraulic valve" can be equipped as a solenoid valve, which is opened by the safety device and thus lowers or releases the operating pressure of the drive, making further movement of the locking body technically impossible.

[0039] Similarly, in the case of an electric drive, the safety device can control or regulate a current flow to the electric drive in order to control and / or regulate the drive power, so that, for example, the safety device specifies a current limit which corresponds to a respective limit load or even the maximum limit load.

[0040] In a further aspect, the object is achieved by a method for moving a bollard according to one of the previously described embodiments, comprising the following steps: - Controlling the drive using the Drive power, so that movement of the Locking body is initiated from the opening position and / or from the locking position, - Measuring the drive load and / or the Drive load increase, so that the measured drive load and / or the measured Drive load increase occurs, - Deactivation of the safety device if the blocking body is in a position within the initial height along the direction of movement, so that the bollard is moved within the initial height despite reaching and / or exceeding the limit load.

[0041] The method according to the invention uses the previously described bollard with the respective technical devices to deactivate the The safety device can be deactivated provided that the blocking body is positioned within the initial height along the direction of movement and that a normal operating load is reached by measuring the drive load and / or the increase in drive load. The safety device can then be deactivated, for example, to break free the blocking body within the bollard.

[0042] The invention is explained below using exemplary embodiments. Figure 1 is a schematic representation of a Bollard in a sectioned side view, Figure 2 is an isometric view of the Bollard of Figure 1 , Figure 3 shows an exemplary arrangement of the Bollards in an environment, namely parallel to a ground level in a parking lot, Figure 4 shows a diagram in a path representation for Representation of a load function of a drive of the bollard of the previous figures, as well as Figure 5 shows another diagram in a time- Path representation of a load function of a bollard drive.

[0043] A bollard 101 has a cylindrical base body 103. The base body 103 has a base plate 105 and a cover 107, the cover 107 being recessed into a ground level 145 such that a surface 141 of the cover 107 is arranged parallel to the ground level 145. The base plate 105 serves to seal the base body 103 against the ground and, together with the base body 103, also to fasten the bollard 101 in the ground, for example in a foundation.

[0044] Arranged within the base body 103 is a likewise cylindrical blocking body 111, which is designed as a bollard that can be moved out of the ground level 145. The blocking body 111 has an upper side 143, which in an opening position 161 is flush with the surface 141, wherein the blocking body 111 is sunk into the base body in the opening position 161. Directly near the upper side 143 on a lateral surface 115, i.e. essentially orthogonal to the upper side 143, the blocking body 111 has a cylindrical projection 121, which forms an upper end of the lateral surface 115 below the upper side 143. The locking body 111 can be moved from the opening position 161 by a distance 183 along a movement axis 181 in the direction of an intermediate position 163, so that in the intermediate position 163 only the projection 121 is arranged above the surface 141 and thus above the floor level 145.The projection 121 is then only visible as the smallest possible portion of the blocking body 111 above the surface 141, so that an excessive risk of tripping or collision for a vehicle in this intermediate position is greatly reduced or even avoided.

[0045] The upper side 143 as well as the surface 141 of the cover 107 are made of stainless steel and are therefore scratch-resistant and less susceptible to wear. These components can also be made of steel, cast steel or another scratch-resistant material. Within the intermediate position, which covers the initial height according to the invention, the bollard 101 is provided with a deactivated Safety circuit operated (described below).

[0046] For movement along the movement axis 181, the blocking bollard 101 has a control unit 151, shown as an example, which has a control board (not shown), the control board having a safety circuit with monitoring of a motor current of an electric drive. Furthermore, the blocking bollard also has a loudspeaker 153 for emitting an additional acoustic warning signal. In an alternative arrangement, the loudspeaker 153 can also be positioned within the upper region of the blocking body 111, i.e. directly below the upper side 143. Only optionally and additionally, an additional light 131 is applied to the upper side 143 of the blocking body 111, which can emit an optical warning signal 133.

[0047] A scraper ring 171 is arranged within the surface 141, which forms a geometric closure in the direction of the upper side 143 of the locking body 111 when the locking body 111 is in the opening position 161 and, moreover, scrapes off dirt during the movement of the locking body 111 parallel to the movement axis 181.

[0048] As an example, the bollard 101 is shown in a parking lot 301 (see Figure 3). In the illustration of Figure 3, the blocking body 111 is moved out by the distance 183 into the intermediate position 163, up to which enables deactivation of a safety device in the controller 151.

[0049] The function of this control with the mentioned safety device is explained in detail as follows:

[0050] A diagram 401 has an abscissa 403, which represents the possible path of the locking body 111 along the movement axis 181 between 0% and 100%. Furthermore, the diagram 401 has an ordinate 405, which represents an output drive power for the drive (not shown) of the locking body 111. In this case, an electric drive is used as an example. A limit load 407 is shown parallel to the abscissa 403, which represents a safety-relevant drive power which must not be exceeded, for example to protect pedestrians. If the barrier bollard 101 is now controlled in the direction of extension, a load function 421 represents the actual drive power which, due to the assumed icing of the barrier body 111 with the base body 103, initially increases above the limit load 407. This load function 421 can be determined, for example, by measuring a motor current of an electric motor. In an initial range 431, which in the example shown here is arranged below 5% of the possible travel of the barrier body 111, an increase in the load function 421 to a load peak 422 below a maximum limit load 409 is permitted, so that the icing is broken up.This is done without the bollard 101 having a heater for the corresponding contact point. The load function 421 then drops towards a continuous load 423 and remains relatively constant since the blocking body 111 can now be moved with a relatively uniform drive load after overcoming the icing. A switch-off peak 427 occurs when the blocking body 111 hits a mechanical limit at 100% of its possible travel path, so that the limit load 407 is then exceeded again and, for example, an automated switch-off of the blocking bollard is carried out. It should be mentioned in this regard that, alternatively, a soft start or soft braking process can also be used to avoid such load peaks or, for example, to enable switch-off at the respective end stop by means of sensory path monitoring with an influence on the control 151.In both cases, it would be ensured that if a load peak 425 were to occur in the meantime, i.e. in the area between the 5% travel distance and 100% travel distance mentioned as an example, that in this area, in which, for example, a passerby would be endangered by the blocking body 111, the limit load 407 would be exceeded, which in turn would switch off the drive.

[0051] Analogously, a diagram 501 shows an abscissa 503, which represents the time course. An ordinate 505 shows the drive power, while a second ordinate 506 enables a path representation over the time represented on the abscissa 503. Analogous to the previous example, a limit load 507 is plotted parallel to the abscissa 503, whereby a permissible maximum limit load 509 above the limit load 507 is plotted parallel to the abscissa 503. A load function 521 shows another possibility of controlling the bollard 101, again using the example of an electric bollard:

[0052] If a first load peak 522 occurs over time which exceeds the limit load 507 but is still below the maximum limit load 509, the control system 151 can determine that the icing on the bollard has not yet broken up. The corresponding breakaway load is then alternately increased with a load peak 523, a subsequently increased load peak 524, and a subsequently increased load peak 525, each below the maximum limit load 509, but significantly above the limit load 507 permissible in the rest of the range.If, as shown in the example of Figure 5, the load peak 525 causes the locking body 111 to break free and the locking body extends as shown in a path function 531, the load function 521 drops to a continuous load 527 analogously to the previous example in diagram 401 until a switch-off peak 529 is reached or, analogously to the previous alternative example, an end stop is reached according to, for example, a path monitoring function.

[0053] It should be mentioned that, for example, a hydraulically driven bollard can be operated in the same way by, for example, measuring the pressure of the hydraulic oil and using it as a reference for the drive power and / or the load on the barrier body. Reference symbol list 101 bollards 103 basic bodies 105 base plate 107 lids 111 locking body 115 shell surface 121 overhang 131 lamp 133 Warning signal 135 Emergency access 141 Surface 143 Top 145 ground level 151 Control 153 speakers 161 Opening position 163 Intermediate position 165 Locking position 171 scraper fring 181 Movement axis 183 Way 185 Way 301 Parking 401 diagram 403 Abs zisse 405 Ordinate 407 Limit load Maximum limit load Load function Load peak Continuous load Load peak Cut-off peak Initial range Diagram Abs cissa Ordinate Ordinate Limit load Maximum limit load Load function Load peak Load peak Load peak Load peak Continuous load Cut-off peak Path function

Claims

Patent claims:

1. Bollard (101) with a base body (103), a drive and a blocking body (111), wherein the base body (103) is connectable to the ground (301) and the blocking body (111) is arranged on the base body (103) so as to be movable by means of a drive power of the drive along a direction of movement (181) over a blocking height (185) against an operating load between an open position (161) and a blocking position (165), an upper side (143) of the blocking body in the open position (161) is substantially flush with a surface (141) of the base body (103) which is substantially flush with the ground (301), and the blocking body (111) is moved out of the ground (301) in the blocking position (165), so that the upper side (143) of the Locking body (111) in the locking height (185) above the Base body (103), wherein a safety device (151) for controlling the drive power is assigned to the drive, wherein the activated safety device (151) at least temporarily reduces the drive power when the operating load (421, 521) increases and a limit load (407, 507) is reached, so that the movement of the locking body (111) relative to the base body (103) is at least temporarily slowed down and / or interrupted when the limit load (407, 507) is reached and / or exceeded, characterized in that the safety device (151) is deactivated within an initial height (163), wherein a movement of the locking body (111) by means of the drive power is controlled by means of the deactivated Safety device (151) despite reaching and / or exceeding the limit load (407, 507), in particular up to a maximum limit load (409, 509), within the Initial height (163) is possible.

2. Bollard according to claim 1, characterized in that the safety device (151) is repeatedly deactivated within the initial height (163) during movement and reaching of the limit load (407, 507), wherein a movement of the blocking body (111) by means of the Drive power is enabled when the safety device (151) is repeatedly deactivated despite the limit load (407, 507) being repeatedly reached and / or exceeded within the initial height (163), wherein the movement and / or attempted movement of the locking body (111) is enabled in particular by means of a stepwise increase (522, 535, 524, 525) of the drive power between the individual deactivation processes (522, 535, 524, 525), in particular up to a maximum limit load (409, 509).

3. Bollard according to claim 1 or 2, characterized in that a load sensor and / or a load increase sensor is assigned to the drive, wherein the drive power is determined as a function of a measured drive load and / or a measured Drive load increase is regulated and in particular the deactivation of the safety device (151) is prevented when the maximum limit load (409, 509) is reached and / or exceeded.

4. Bollard according to one of the preceding claims, characterized in that a temperature sensor is assigned to the drive, wherein the safety device (151) can be deactivated when a measured temperature of 5°C, 3°C, 1°C or 0°C is undershot and remains activated when this temperature is exceeded.

5. Bollard according to one of the preceding claims, characterized in that the safety device (151) is activated when moving from the opening position (161) into the Locking position (165) and / or when moving from the locking position (165) to the opening position (161) within the respective initial height (163) is deactivated.

6. Bollard according to one of the preceding claims, characterized in that the drive is hydraulic, wherein the deactivation of the safety device (151) takes place by means of a hydraulic valve, wherein a temporary lowering and / or releasing of a hydraulic pressure for the drive is made possible by means of the hydraulic valve.

7. Bollard according to one of the preceding claims, characterized in that the drive is electrical, wherein the safety device (151) controls and / or regulates a current flow to the electric drive for controlling and / or regulating the drive power.

8. Method (401, 501) for moving a bollard (101) according to one of the preceding claims, comprising the following steps: - controlling the drive by means of the drive power, so that a movement of the locking body (111) from the opening position (161) and / or from the locking position (165) is initiated, - Measuring the drive load and / or the Drive load increase, so that the measured drive load and / or the measured drive load increase is available, - Deactivation of the safety device (151) if the locking body (111) is in a position within the initial height (163) along the direction of movement (181), so that the bollard (101) despite reaching and / or exceeding the limit load (407, 507) within the Initial height (163) is moved.

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