CZ310553B6 - Retractable security fence - Google Patents

Abstract

The retractable security fence is a modular system built into the terrain around objects, the individual modules of which are formed by a housing (1), which is recessed into the terrain and closed by a lid (2). On the sides, the housing (1) is provided with a seal (4) against the ingress of groundwater into the housing (1). It also contains a stationary structure (17) formed by guide posts (7) with a toothed comb (8). Two retractable structures (3) of adjacent modules are connected by a pair of guide posts (7). The retractable structure (3) is formed by rectangular retractable profiles (9) connected to the lower frame (12), formed by side tubular profiles (11) horizontally connected by steel beams (29) with an integrated welded mesh (13). The upper frame (16) is formed by a circular guide column (14), to which is vertically connected a flange (15) passing through a guide groove in the side tubular profile (11). The extension drive is formed by an electric motor with a gearbox (25), a shaft (26), plain bearings (24), a pinion (23) and a cable (18), which are connected to the lower steel beam (28) of the lower frame (12).

Description

Retractable security fence

Technical field

A retractable security fence is a device used to prevent unauthorized entry to a protected plot of land, area or territory during times of increased threat from unwanted persons or in the event of an imminent terrorist attack on significant objects where other commonly used, permanently installed fences and barriers cannot be used for any reason, especially urban planning.

Current state of technology

The increase in the migration wave associated with illegal crossing of state borders and the risk of terrorist attacks on embassies and prominent buildings, often located in historic parts of cities, is forcing individual states to build permanent fences, even in completely inappropriate places. A striking case is the illegal construction of a security fence around the American embassy on Hviezdoslavové náměstí in Bratislava, or the fences being built on state borders between individual states within the Schengen area. The constructed facilities are permanent and their eventual removal will require significant financial resources.

In addition to permanent barriers, there are barriers in the form of retractable posts designed primarily against vehicles with the possibility of central control.

Furthermore, mobile concrete barriers are known that must be stored outside the area of use, then transported to the site and removed again after the end of the emergency measures, which is associated with additional financial costs for storage, transport to the site and back, and assembly.

The essence of the invention

Several technical solutions in various areas are based on the general principle of sliding plates out of a box.

The essence of the invention of the retractable security fence is a modular system, permanently built into the terrain, capable of creating a continuous barrier in a very short time, both against manpower and against technical means. In the idle state, the structure of the retractable security fence is placed in a reinforced concrete casing or casing made of another material, protruding above the terrain. After activation, two frames equipped with welded mesh fillings are simultaneously extended vertically using electric motors with a gearbox and a cable transmission in combination with a toothed rack and pinion. After reaching the upper dead center, both frames are extended using counter-directional L

- 1 CZ 310553 B6 profiles, located both along the upper edge of the lower frame from the outside and along the lower edge of the upper frame, lock into each other and thus lock the frames against each other.

The drive is assumed to be an electric motor with a gearbox attached to the underside of the lower frame. When activated, the electric motor rotates a drive shaft with a pinion, which rolls along a toothed rack, thereby extending the retractable safety fence structure and simultaneously exerting tension on the cable and lifting the upper frame.

Another significant feature is the solution using guide posts and retractable rectangular profiles. The height of the lower and upper frames is only half the height of the rectangular retractable profiles, so that when fully extended, the entire half of the rectangular retractable profile on the guide post remains hidden in the housing, thus ensuring the overall stability of the retractable safety fence without the need for additional struts. This means that both frames of the retractable safety fence can be extended with one drive.

The retractable security fence also includes electronic signaling security with motion detectors.

Clarification of drawings

Fig. 1 Retractable safety fence - complete module;

Fig. 2 Construction of a retractable safety fence without a housing in the extended position;

Fig. 3 Construction of a retractable safety fence without a housing before activation;

Fig. 4 Retractable mechanism with joint closure;

Fig. 5 Guide posts of the retractable safety fence;

Fig. 6 Detail view of the upper extended frame;

Fig. 7 Detail of the lift drive mechanism - rack and pinion;

Fig. 8 Retractable safety fence.

Examples of implementation of the invention

The examples of embodiments of the invention described and shown below are for illustrative purposes only and are not intended to limit the scope of the invention. In particular, the simultaneous extension of two frames can be achieved in many ways, including by using different ways of mounting the rollers. Those skilled in the art will find possible equivalents to the solutions described herein. These equivalents are also intended to be included within the scope of the claims.

The retractable safety fence is made up of individual modules (Fig. 1). Each module consists of a housing 1 made of reinforced concrete or another material, e.g. metal or composite, closed by a lid 2. On the sides of the housing 1, a seal 4 is fitted to prevent groundwater from entering the housing 1. Inside the housing 1, the retractable safety fence structure itself is fitted, consisting of a stationary structure 17, consisting of a pair of guide posts 7 on the lower side, terminated by a foot 5, with which the structure is anchored to the housing 1 with screws 6. The guide posts 7 are provided with a toothed comb 8 on the front side. Furthermore, the retractable safety fence structure is formed by a retractable structure 3 consisting of rectangular retractable profiles 9 with a vertical groove through which a toothed comb 8, firmly connected to the guide post 7, passes. The lower frame 12 is connected to the side of the rectangular retractable profile 9 by means of a side tubular profile 11 seconds

- 2 CZ 310553 B6 with a milled guide groove. Two side tubular profiles 11 horizontally connect steel beams 29 and form the lower frame 12. The lower frame 12 includes a welded mesh 13 as a filler.

A circular guide post 14 freely passes through the side tubular profile 11, to which a side profile 20 is connected by a flange 15. Two side profiles 20 are horizontally connected by steel bars 28 and together form the upper frame 16. The filling of the upper frame 16 is formed by a welded mesh 13. Steel spikes 19 are mounted on the upper edge of the steel bar 28.

The drive system for activating the retractable safety fence consists of an electric motor with a gearbox 25, which is firmly attached to the underside of the steel beam 28 of the lower frame 12. The drive shaft 26 runs along the entire length of the lower frame 12, to which it is attached by sliding bearings 24. Pinions 23 are mounted on both ends of the drive shaft 26. Furthermore, the vertical movement and simultaneous extension of the lower frame 12 and the upper frame 16, which are placed one behind the other in the stationary state (Fig. 3), is realized by means of a cable 18 and pulleys attached to the retractable circular column 14 connected by a flange 15 to the side profile 20. By rotating the shaft 26, the movement is transmitted to the pinion 23, which rolls along the toothed rack 8 and simultaneously extends the circular guide column 14 by means of the cable 18. After When the upper frame 16 is extended, two structures of the retractable fence of adjacent modules are connected by means of a rectangular sleeve 10 attached to the side of one retractable rectangular profile 9 with the adjacent rectangular retractable profile 9 of the adjacent retractable structure 3 so that this rectangular retractable profile 9 is inserted into the rectangular sleeve 10. At the same time, the connecting closure 21 attached to the side profile 20 of the upper frame 16 is also extended. For the correct function of the connecting closure 21, it is necessary to determine during the design process which side profile 20 it will be connected to. After extension, the upper edge of the connecting closure 21, provided with a cutout in the toothed part, is inserted into the lock 22 of the closure 21 of the adjacent module. In the extended position, the connecting closure 21 covers free access to the cables 18 between two modules. Horizontally, the upper frame 16 is connected to the lower frame 12 using L profiles 27 mounted in a mirror-like manner to the lower steel beam 28 of the upper frame 16 and to the upper steel beam 29 of the lower frame 12.

Mirror-mounted L profiles 27 ensure the locking of the lower frame 12 and the upper frame 16 at the upper dead center and double the width of the fence in its middle and against possible breaking.

The system can be connected to various signaling and electronic detection devices, camera systems, etc.

Industrial applicability

Installing a retractable security fence can be used wherever it is not possible, or for any reason desirable, to build existing facilities to protect objects and territories that permanently disrupt the landscape or urban character of urban agglomerations, especially in the vicinity of historical and listed buildings.

Claims (5)

1. A retractable security fence consisting of at least one module, characterized in that each module consists of a housing (1) embedded in the terrain, a closable lid (2), provided with a seal (4) on the sides to prevent groundwater from entering the housing (1) with an integrated stationary structure (17) and a retractable structure (3). 2. A retractable safety fence according to claim 1, characterized in that the stationary structure (17) is anchored to the housing (1) by a foot (5) provided with holes for screws (6) and a pair of guide posts (7) attached thereto, wherein the foot (5) connects two adjacent modules and two guide posts (7) for the deployment and vertical displacement of the retractable structure (3), wherein the pair of guide posts (7) connects two retractable structures (3) of adjacent modules. 3. A retractable safety fence according to claim 2, characterized in that a retractable structure (3) formed by a rectangular retractable profile (9) is mounted on the guide posts (7), with a vertical groove for a toothed rack (8) fixed to the guide post (7), while a lower frame (12) is connected to the side of the retractable profile (9), which forms two side tubular profiles (11) with a milled vertical groove, horizontally connected by steel bars (28) and a welded mesh (13). 4. A retractable security fence according to the preceding claims, characterised in that the retractable structure (3) is further formed by an upper frame (16) consisting of circular guide posts (14) vertically connected to a flange (15), penetrating through a milled groove in the side tubular profile (11), whereby the circular guide posts (14) are connected to the side profiles (20) and in the horizontal plane by steel spikes (29), whereby steel spikes (19) are fitted on the upper steel spike (29) and a closure (21) is attached to the side profile (20) on one side of the frame (16) and a lock (22) of the closure (21) is attached to the opposite side of the upper frame (16). 5. A retractable safety fence according to the preceding claims, characterized in that it is provided with a drive mechanism consisting of a toothed rack (8) attached to a guide post (7), an electric motor with a gearbox (25), a drive shaft (26) at each end provided with a pinion (23) and at least one sliding bearing (24), firmly connected, as well as the electric motor with a gearbox (25), to the underside of the steel bar (29) of the lower frame (12) and a cable (18) for extending the upper frame (16).