DE20305540U1 - Stop barrier in road for vehicles with pneumatic tires consists of transverse groove in road with pivoting sharp spikes set to puncture tire rolling in wrong direction - Google Patents

Abstract

The barrier (1) incorporates a groove in the road lined with a top-hat section trough (3), and covered by a flat plate (5) with slits through which sharp triangular spikes (15) may protrude. The spikes are mounted on a shaft (17) which can rotate and are connected together by a rod (21) passing through the free ends (20) of levers (16) in one piece with the spikes. Actuators (34) may lift up the levers and spikes to their operative position and are pivoted in the lower corner (35) of the groove. The spikes puncture a tire (2) rolling in the wrong direction.

Description

Heintzmann Security Systems GmbH & Co. KG Bessemer Str. 80. D-44793 Bochum

Ground barrier for pneumatic-tyred vehicles

The invention relates to a ground barrier for pneumatic-tyred vehicles according to the features in the preamble of claim 1.

Such a ground barrier is considered to be state of the art in the brochure of GUARDIAN FENCING AND SECURITY SYSTEMS CO. LTD., P.O. Box 6765, Dammam, 31452, Saudi Arabia under the name "SHARK JAW BARRIERS". In this ground barrier, several triangularly configured blade bars are attached in parallel alignment via base plates on a surface of a blade carrier with a roof-shaped cross-section. The blade carrier is arranged so that it can pivot in a housing made of concrete and firmly embedded in the ground. This housing is closed at the top on the one hand with a housing cover made of steel, which has a large rectangular extension for the blade carrier and several slots extending from the extension for the blade bars to pass through. On the other hand, the housing is closed by the second roof surface of the blade carrier,

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when it is pivoted into the overrun position. The knife carrier can be pivoted using pneumatic or hydraulic energy.

In the drive-over position, the housing is completely closed at the top. The blade bars are immersed in the slots in the housing cover and close the slots, while the second roof surface fills the rectangular recess in the housing cover. If there is imminent danger, the blade carrier is swiveled so that the blade bars point diagonally upwards against the direction of travel of a vehicle. If the vehicle's tires come into contact with the blades, they are destroyed, so that the vehicle comes to a stop a short distance behind the ground barrier, even at a relatively high speed.

The disadvantage of the well-known ground barrier is the comparatively high cost of manufacturing and assembling it. The blade carrier must be designed to be so stable that the various blade bars can be screwed onto a roof surface using the base plates connected to them. In addition, pneumatic or hydraulic energy must be provided to rotate the blade carrier, with both the energy source and the connection between the energy source and the swivel drive being natural weak points.

The invention is based - based on the prior art - on the object of creating a ground barrier for pneumatic-tyred vehicles which is simpler in design, easier to manufacture and also easier to install.

This problem is solved by the features specified in the characterising part of claim 1.

The invention provides a complete system that is prefabricated as a whole and installed in a depression in the ground at the intended location.

can be installed. The knife bars are punched out of blanks together with the associated pressure legs and only need to be provided with openings for threading onto a swivel shaft. The pressure legs also only need to be cut out for a connecting link. The knife bars are preferably welded to the swivel shaft and the pressure legs to the connecting link. This torsion-resistant knife unit is then inserted into the housing and pivotably mounted therein. The housing cover only has slots for the knife bars and pressure legs to pass through.

Important within the scope of the invention are the pressure legs positioned in front of the blade bars in the direction of travel of a vehicle. In the locking position, these protrude upwards from the slots at an angle. If a pneumatic tire touches a pressure leg, this occurs before contact with the tip of a blade bar. Due to the one-piece design of the blade bars and the pressure legs, the entire blade unit is pivoted in the direction of the vehicle's pneumatic tires and, as it continues to move forward, the blade bars engage intensively with the material of the pneumatic tire. The vehicle is stopped safely. It comes to a standstill in the area of the ground barrier.

The material of the entire ground barrier is preferably hot-dip galvanized steel. The blade tips can be hardened.

A preferred embodiment of the invention consists in the features of claim 2. According to this, the opening angle between a knife web and the pressure leg associated with it is smaller than 90°. In particular, the opening angle can be approximately 60°. This design ensures that the knife webs securely grip a pneumatic tire, thereby destroying it.

In order to further intensify the destruction of the pneumatic tire, according to claim 3, the edges facing the pressure legs

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The narrow sides of the knife bars are sharpened in a wedge shape. The narrow sides in particular can be sharply ground.

Although the pivot shaft can consist of a rod of various cross-sectional configurations, the pivot shaft is preferably formed by a tube according to claim 4. This reduces the weight without impairing the function.

A particularly simple design of the bearing points for the pivot shaft is seen according to claim 5 in that the bearing points for the pivot shaft are formed by bearing shells attached to the inside of the end walls of the housing with concave recesses that are open at the top and by bridge-like locking pieces that can be screwed to the bearing shells and have concave recesses that are open at the bottom. The bearing shells are preferably welded to the end walls. To assemble, the pivot shaft only needs to be inserted with its ends into the bearing shells. The locking pieces are then placed on top and screwed to the bearing shells.

In a particularly safety-relevant manner, according to the features of claim 6, the blade bars are constantly loaded in the direction of the locking position under the influence of at least one reset element. This means that the blade bars and the pressure legs always protrude upwards from the slots in the housing cover. It is therefore not necessary to first move the floor barrier into a locking position to activate it. A vehicle driving over the floor barrier in the opposite direction presses the blade bars with its pneumatic tires over their back surfaces into the slots in the housing cover, without the blade bars having a destructive effect on the vehicle's pneumatic tires. Once the pneumatic tires have passed the floor barrier, the blade bars are immediately returned to the locking position by the reset element.

A simple and yet extremely practical embodiment of a return element is seen in the features of claim 7. According to this, the return element consists of a gas pressure spring which is pivotably attached to the housing on the one hand and to a pressure leg adjacent to a bearing point of the pivot shaft on the other. It can be useful to provide a return element at both ends of the pivot shaft. A return element in the form of a gas pressure spring requires only minimal maintenance and has a long service life.

The reset element can be fixed to the housing via a bracket which is fixed to a front wall inside the housing at the transition from the housing base to a side wall.

According to claim 8, it is also advantageous if the back surfaces of the blade bars are connected to one another by a flat strip. Such a flat strip ensures that even narrow tires of a vehicle can pass through the floor barrier in the opposite direction to the locking direction and press the blade bars into the slots. In addition, the load from a vehicle is better distributed across the entire system. The flat strip can be embedded in grooves in the back surfaces so that the top of the flat strip is in the same plane as the back surfaces of the blade bars.

Although the connecting member coupling the pressure legs can also be formed by a tube, it is advantageous according to claim 9 that this connecting member consists of a rod. Stops for the ends of the connecting member that define the locking position are then provided on the inside of the end walls of the housing. These stops can be used to determine exactly how much each pressure leg protrudes from the respective slot in the housing cover and at what angle a blade web points against the direction of travel of a vehicle.

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According to claim 10, the stops are expediently formed by bridge-like brackets with concave recesses that are open downwards. These brackets are welded to the inside of the end walls of the housing.

According to claim 11, it is also advantageous that the housing cover is formed by a checker plate that is detachably secured to horizontal flanges of the housing. The housing cover can preferably be secured to the horizontal flanges using screw bolts. The horizontal flanges adjoin the upper longitudinal edges of the side walls.

The stability of the housing cover is increased by the fact that the slots in the housing cover are closed on the circumference according to protection claim 12.

To further stiffen the housing cover, it is stiffened on the underside by U-profiles which are arranged between the slots.

According to the features of claim 14, the housing is trough-shaped and is reinforced on the bottom and on the long walls by transversely projecting outer U-shaped webs. The housing can be manufactured in this way by bending a plate, whereby the bottom, the side walls and the horizontal flanges are formed. The U-shaped webs are then welded on at predetermined intervals. In view of the trough-shaped design of the housing, it can also be useful to assign a flushing device to this housing in order to be able to clean the housing from time to time. For this purpose, a flushing valve for water in particular can be provided on one end wall and a drainage system in the area of the other end wall or the floor there.

The end walls of the housing can be provided in a detachable manner according to claim 15. For this purpose, the U-shaped webs at the ends are provided with holes so that they can be fixed to the U-shaped webs via corresponding holes in the end walls. If the

Since end walls are provided permanently on the housing, housings of different lengths can also be connected to one another at the end if required, in order to be able to take into account all specific local requirements of the practice directly from the warehouse.

Of course, the floor barrier according to the invention can also be deliberately pivoted from the blocking position to the override position if vehicles want to pass the floor barrier against the blocking direction. A deliberate shift from the override position to the blocking position is also conceivable. The devices can be controlled and operated remotely. For this purpose, the floor barrier can be equipped with suitable monitoring devices (sensors, contacts, etc.). It is also useful to check if the floor barrier has been in the pivoted-in state for a predetermined time. It should then be possible to quickly ask why the floor barrier has not moved to the blocking position. Regulatory action can then be taken immediately. Retrofitting the floor barrier according to the invention to make it automatic is also conceivable. The automatic system can then work on a pneumatic, electrical or hydraulic basis and be electronically controlled.

The invention is explained in more detail below with reference to embodiments shown in the drawings.

Figure 1 in schematic vertical cross-section a soil barrier for

pneumatic-tyred vehicles with one pneumatic tyre in two positions;

Figure 2 Parts of the ground barrier of Figure 1 in a schematic perspective exploded view;

Figure 3 is a plan view of an end portion of a housing of the bottom barrier of Figure 1;

Figure 4 is a vertical cross-section through the representation of Figure 3 along the line IV-IV seen in the direction of the arrows IVa;

Figure 5 is a representation corresponding to that of Figure 3 with

integrated knife unit;

Figure 6 shows a cross-section through the representation of Figure 5 along the line VI-VI seen in the direction of the arrows VIa with two different positions of a knife web with pressure leg;

Figure 7 shows a side view of a knife bar with integrated pressure leg;

Figure 8 shows a cross section through the representation of Figure 7 along the

Line VIII-VIII seen in the direction of the arrows Villa;

Figure 9 is a plan view of a housing cover of the bottom barrier of the

Figure 1 and

Figure 10 is a vertical cross-section through the representation of Figure 9 taken along the line X-X in the direction of the arrows Xa.

In the diagram in Figure 1, 1 designates a ground barrier for vehicles with pneumatic tires. Only one pneumatic tire 2 of the vehicle is shown.

The bottom barrier 1 comprises, as can be seen when looking at Figures 1 and 2 together, a trough-like housing 3, a blade unit 4 pivotably integrated into the housing 3 in a manner explained in more detail below, and a housing cover 5 which is detachably secured to horizontal flanges 6 of the housing 3 by means of screw bolts and nuts (not shown in more detail). For this purpose, holes 7 are provided on the long sides of the housing cover 5 and in the horizontal flanges 6.

The base 8, the side walls 9 and the horizontal flanges 6 of the housing 3 are formed by bending a steel plate. At the end, the

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Housing 3 is stiffened by U-shaped webs 10, which engage under the horizontal flanges 6 and the base 8 and rest on the outside of the side walls 9. The U-shaped webs 10 are welded to the horizontal flanges 6, the side walls 9 and the base 8. There are through holes 11 in these U-shaped webs 10. These through holes 11 serve to accommodate screw bolts (not shown in more detail), via which end walls 12 closing off the interior of the housing 3 can be secured to the U-shaped webs 10. For this purpose, holes 11 are also provided in the end walls 12.

At suitable distances from the end U-webs 10, further U-webs 13 are provided in the longitudinal direction of the housing 3 to stiffen the housing 3. See in particular Figure 2. There are no holes in these U-webs 13.

The housing 3, which is to be embedded in the ground 14 or in concrete according to Figure 1, serves, as mentioned, to accommodate a knife unit 4, which can be seen in more detail in Figure 2.

The knife unit 4 comprises several triangularly configured knife webs 15 arranged parallel to one another at a distance from one another, as well as pressure legs 16 forming integral components of the knife webs 15 with a largely rectangular configuration (Figures 1, 2 and 5 to 8). The knife webs 15 are threaded onto a pivot shaft 17 consisting of a tube and are connected to the pivot shaft 17 in particular by tack welding. For this purpose, holes 19 are provided in the knife webs 15 diametrically offset to the knife tips 18 (Figure 7).

In Figure 2, it is illustrated in dash-dotted lines that the knife webs 15 can be connected to one another by a flat strip 42 which is fastened to the back surfaces 40 of the knife webs 15.

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The free ends 20 of the pressure legs 16 are coupled by a connecting member 21, in particular in the form of a rod. The pressure legs 16 are also connected to this connecting member 21, in particular by tack welding. Bores 22 in the free ends 20 serve to accommodate the connecting member 21. The pressure legs 16 extend in the pivot planes SE of the knife webs 15 (Figure 5).

As can be seen in particular from Figure 7, the knife tips 18 of the knife webs 15 protrude beyond the pressure legs 16. The opening angle a is approximately 60°. It can also be seen, when looking at Figures 7 and 8 together, that the narrow sides 23 of the knife webs 15 facing the pressure legs 16 are sharpened in a wedge shape. The knife tips 18 extend approximately in the vertical central transverse plane VMQ of the pressure legs 16.

The bearing points 24 for the pivot shaft 17 are formed, as can be seen from Figures 3 to 6, by bearing shells 26 with upwardly open concave recesses 27 fastened to the inner sides 25 of the end walls 12 of the housing 3 and by bridge-like locking pieces 28 with downwardly open concave recesses 29 that can be screwed to the bearing shells 26. Consequently, the pivot shaft 17 has shaft stubs 30 that protrude beyond the end-side knife webs 15 (Figures 2 and 5).

Furthermore, Figures 3 to 5 show that stops 31 in the form of bridge-like brackets with concave recesses 32 open downwards are attached to the inner sides 25 of the end walls 12. These stops 31 interact with the end sections 33 of the connecting member 21 coupling the free ends 20 of the pressure legs 16 in a manner described below.

The knife unit 4 is under the influence of two return elements 34 in the form of gas pressure springs at both ends as shown in Figures 1, 3, 5 and 6. These return elements 34 are attached to

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The two bearings 35 are pivotably connected to the brackets 35, which are fixed to the bottom inside the housing 3, and the other is pivotably connected to the outer pressure legs 16 adjacent to the bearing points 24 of the knife unit 4.

The housing cover 5 closing the housing 3 has circumferentially closed slots 36 for the passage of the knife webs 15 and the pressure legs 16 (Figures 1, 2, 6, 9 and 10). Figures 6, 9 and 10 also show that the housing cover 5 is stiffened between the slots 36 by U-profiles 37. The top 38 of the housing cover 5 is grooved, as indicated in Figure 9. If the knife webs 15 are connected by a flat strip 42, the housing cover 5 is correspondingly recessed in some areas.

As shown in particular in Figures 1 and 6, the knife unit 4 can be pivoted about an axis 39 from a travel position UP (dash-dotted line) lowered into the housing 3 through the slots 36 in the housing cover 5 into a locking position SP locked above the housing cover 5.

Due to the reset elements 34, the blade unit 4 is basically in the locking position SP shown in solid lines in Figures 1 and 6. If a vehicle moves in the direction of the arrow PF in Figure 1, the pneumatic tires 2 of the vehicle, when they come into contact with inclined back surfaces 40 of the blade webs 15, press the blade unit 4 through the slots 36 into the interior of the housing 3 (dash-dotted representations in Figures 1 and 6), so that the vehicle can easily pass the floor barrier 1. If the pneumatic tires 2 no longer have contact with the back surfaces 40 of the blade webs 15 or with a flat strip 42, the blade unit 4 is immediately moved back into the locking position SP according to Figures 1 and 6 by the reset elements 34. This locking position SP is clearly fixed by the engagement of the end sections 33 of the connecting member 21 in the recesses 32 of the stops 31.

A vehicle that wants to pass the ground barrier 1 in the direction of the arrow PF1 according to Figure 1, due to the targeted relative assignment of the pressure legs 16 to the blade webs 15, first comes into contact with the upper sides 41 of the pressure legs 16 and pivots the blade unit 4 about the axis 39, so that the blade webs 15 are pulled into the material of the pneumatic tires 2, cut this material and/or become entangled in this material (Figure 1, cross-hatched representation of the pneumatic tire 2). The vehicle is stopped.

Reference symbol list

1 - Ground barrier

2 - Pneumatic tires

3 - Housing v. 1

4 - Blade unit 5- Housing cover

6 - Horizontal flanges v.

7 - Holes in 5 u.

8 - Floor of 3

9 - Side walls of 3 10- U-bars

11 - Through holes in 10 u.

12- Front walls of 3

13- U-bridges

14- Soil

15- Knife bars

16- Pressure leg

17- Pivot shaft

18- Knife tips

19- Drilling in 15

20- free ends of 16

21 - Connecting link

22 - Drilling in 20

23- Narrow sides of

24- Bearings for 17

25 - Inside pages of 12

26 - Bearing shells on

27 - Recesses in

28 - Locking pieces v.

29 - Recesses in

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30 - Shaft stub &ngr;.

31 - Attacks on 25

32 - Recesses in

33 - Earth sections v. 21

34 - Reset elements

35 - Consoles for 34

36 - Slots in 5 37- U-profiles

38 - Top of 5

39 - Axle of 4

40- Back surfaces of 41 - Top surfaces of 16 42- Flat strip on 40

a - opening angle between 15 and

VMQ - vert. median transverse plane v.

UP - overrun position v.

SP - Locking position v. 4

PF- Arrow

PF1 - Arrow

SE - swivel planes from 15 u.

Claims (15)

1. A ground barrier for pneumatic-tyred vehicles, which has a plurality of triangularly configured blade webs ( 15 ) arranged parallel to one another at a distance, which can be pivoted about a common axis ( 39 ) from a drive-over position (ÜP) lowered into a housing ( 3 ) through slots ( 36 ) in a housing cover ( 5 ) into a locking position (SP) locked above the housing cover ( 5 ) and back, characterized in that the blade webs ( 15 ) are individually threaded onto a pivot shaft ( 17 ) which is rotatably mounted in the housing ( 3 ) via their end sections ( 30 ) and are connected to the pivot shaft ( 17 ) in a rotationally fixed manner, wherein each blade web ( 15 ) is permanently assigned a pressure leg ( 16 ) in its pivot plane (SE), and the pressure legs ( 16 ) are connected at their free ends ( 20 ) via a are torsionally rigidly coupled to a connecting member ( 21 ) extending parallel to the pivot shaft ( 17 ). 2. Soil barrier according to protection claim 1, characterized in that the opening angle (α) between a knife web ( 15 ) and a pressure leg ( 16 ) is smaller than 90°. 3. Soil barrier according to protection claim 1 or 2, characterized in that the narrow sides ( 23 ) of the knife webs ( 15 ) facing the pressure legs ( 16 ) are sharpened in a wedge shape. 4. Ground barrier according to one of the protection claims 1 to 3, characterized in that the pivot shaft ( 17 ) is formed by a tube. 5. Floor barrier according to one of the protection claims 1 to 4, characterized in that the bearing points ( 24 ) for the pivot shaft ( 17 ) are formed by bearing shells (26) fastened to the inner sides ( 25 ) of the end walls ( 12 ) of the housing ( 3 ) with concave recesses ( 27 ) open at the top and by bridge-like locking pieces ( 28 ) screwable to the bearing shells ( 26 ) with concave recesses ( 29 ) open at the bottom. 6. Floor barrier according to one of the protection claims 1 to 5, characterized in that the knife webs ( 15 ) are constantly loaded in the direction of the locking position (SP) under the influence of at least one return element ( 34 ). 7. Floor barrier according to protection claim 6, characterized in that the return element ( 34 ) is formed by a gas pressure spring which is pivotally fixed on the one hand to the housing ( 3 ) and on the other hand to a pressure leg ( 16 ) adjacent to a bearing point ( 24 ) of the pivot shaft ( 17 ). 8. Ground barrier according to one of the protection claims 1 to 7, characterized in that the back surfaces ( 40 ) of the knife webs ( 15 ) are connected to one another by a flat strip ( 42 ). 9. Floor barrier according to one of the protection claims 1 to 8, characterized in that the connecting member ( 21 ) coupling the pressure legs (16) is formed by a rod firmly connected to the pressure legs ( 16 ) and stops ( 31 ) defining the locking position (SP) for the ends ( 33 ) of the connecting member ( 21 ) are provided on the inner sides ( 25 ) of the end walls ( 12 ) of the housing ( 3 ). 10. Floor barrier according to protection claim 9, characterized in that the stops ( 31 ) are formed by bridge-like consoles with concave recesses ( 32 ) open downwards. 11. Ground barrier according to one of the protection claims 1 to 10, characterized in that the housing cover ( 5 ) is formed by a checkered plate releasably fixed to horizontal flanges ( 6 ) of the housing ( 3 ). 12. Soil barrier according to one of the protection claims 1 to 11, characterized in that circumferentially closed slots ( 36 ) are provided in the housing cover ( 5 ) for the passage of the knife webs ( 15 ) and the pressure legs ( 16 ). 13. Ground barrier according to one of the protection claims 1 to 12, characterized in that the housing cover ( 5 ) is stiffened on the underside between the slots ( 36 ) by U-profiles ( 37 ). 14. Floor barrier according to one of the protection claims 1 to 13, characterized in that the housing ( 3 ) is designed like a trough and is stiffened on the floor side and on the longitudinal walls ( 9 ) by transversely projecting U-webs ( 10 , 13 ). 15. Ground barrier according to one of the protection claims 1 to 14, characterized in that the end walls ( 12 ) of the housing ( 3 ) are detachable.