EP1813741A2 - Safety fence - Google Patents

Abstract

Assembly part (30) to assemble security fence wtih fence posts, flat fence parts (12) made of grid matting, detection cable (16) held by clamps (18) which are moulded into U-shaped guide rails (14) whose sides converge towards their opening. It is able to be connected to the guide rails on one hand and can be positively fixed to the flat fence parts on the other. Part is put or moulded onto guide rail, and positively or materially fixed to it and then welded onto it. It has a hollow space inside which has an opening into which a horizontal rod of the grid matting can be guided.

Description

The present invention relates to a security fence with fence posts, flat fence elements made of mesh mats and at least one detection cable, which is held by clamping body in at least one U-shaped in cross-section, downwardly open guide rail made of metal, which fastened with horizontal course to the flat fence elements is.

Such a security fence is by the DE 88 08 533 U1 known. In this safety fence there is the defect that a U-shaped clamping profile used as a clamping body does not reliably hold firmly in the U-shaped guide rail forming a horizontal bar.

Security fences are used to prevent unauthorized intrusion of people into specific areas and, if necessary, to register and capture any manipulation of the fence or even overhanging it, for example in company premises and other sensitive large-scale outdoor areas. An increasingly important area of use are z. As the open spaces of car dealerships, where motor vehicles are issued for sale. To prevent vandalism or destruction of outdoor motor vehicles by vandalism, it is necessary to enclose the often sprawling areas, which have reliable sensors to signal the attempt of burglary. However, it has been shown that conventional motion detectors alone are not sufficient, since they trigger a signal even when animals move. As a result, security fences are provided with special detectors, which can detect a manipulation on the fence areas or even exceeding the fence. For example, in a solution offered on the security market, a horizontally extending inverted U-profile attached to the grid mat receives a detection cable which will interfere with vibration and vibration of the fence, for example, attempting to fence or sever the fence or try to overspeed it Alarm signal generated, which is transmitted to an alarm unit. For the detection cable to detect the movement or structure-borne noise, it must be very firmly connected to the fence. In the available solution, the cable should be fixed by plastic wedges in the downwardly open profile. However, it has been shown that the plastic wedges can not permanently fix the cable in the U-profile with parallel side walls and often even fail after a short time. The cables are therefore included in practice regularly by means of silicone or other sealing compounds in the U-profile. However, this is a relatively soft, yielding integration of the cable that suffers its detection capability and signal evaluation.

Starting from the DE 88 08 533 U1 Therefore, the object of the present invention is to provide a security fence in which the detection cable is held more reliably and permanently rigid in the guide rail.

According to the invention the object is achieved by a safety fence of the type described, in which the side walls of the U-shaped guide rail converge towards its opening and the cross sections of the guide rail and the clamping body are dimensioned such that through the opening are held in the guide rail and against the detection cable pressed clamp body by the converging side walls in a pressure of the detection cable with a certain minimum pressure against the wall of the guide rail securing position.

The advantage of the security fence according to the invention is that the clamping body are permanently held in the guide rail. Even with thermal expansion of the profile and blows or bumps on the profile, the clamp body can not fall out because the opening is conical and it would be necessary for a emergence of the clamp body of the guide rail to widen the side walls. By accurately adjusting the dimensions of the clamp body, the cable diameter, the cable material and the cross-sectional dimensions of the U-shaped guide rail, the minimum pressure of the clamp body can be adjusted to the detection cable through which it is held. This is necessary to ensure reliable operation of the detection cable, i. to generate a signal with a uniqueness required for an evaluation. If the pressure is too high, the cable will be squeezed so that it can no longer generate a clear signal. Another advantage is that the clamp bodies are arranged in the mounted state within the guide rail, and so do not appear outward appearance and thus the cable is better protected against vandalism.

In a preferred embodiment, a first side wall of the guide rail forms a right angle with its upper side, while the second side wall forms an angle with the upper side which is smaller than 90 °. In this way, the U-shaped guide rail can be easily produced, because the converging side walls are achieved in that only one side wall of the guide rail deviates from the usual U-profiles of 90 °. As favorable, an inclination of about 5 to 15 ° has turned inside out. Particularly advantageous is an embodiment in which the second side wall is inclined by about 10 ° inwards, resulting in a very favorable for the impressions of a clamping body measure. On the one hand, the inclination is great enough to prevent the emergence of a clamping body in the installed state, but on the other hand the inclination of the second side wall and thus the ratio of the clear width at the point where the clamping body is in the assembled state, to the clear width sufficiently narrow at the narrowest point of the guide rail so as not to over-bend the side walls when the sprag is inserted into the profile.

In a preferred embodiment, the detection cable is a piezoelectric cable. Such a type of cable has proven to be particularly suitable, in conjunction with an evaluation device and corresponding software, to enable a reliable detection and differentiation of various disturbances.

Further preferred is an embodiment in which the clamping bodies are cylindrical rod sections which can be produced simply and inexpensively by cutting a rod to length. In addition, however, also clamp body in the form of balls come into question. Both the rod sections and the cross-sectionally U-shaped guide rail can be made, for example, of metal, for example steel, or of solid plastic, in order also to be subject to different weather-dependent conditions Conditions to ensure a permanent jamming of the cable in the guide rail. If the rod sections and the guide rail are made of the same material, it is ensured that the guide rail and the clamping body uniformly expand when exposed to heat, for example by solar radiation. The material steel also allows easy production, for example by the guide rail is folded from sheet steel, and can be well integrated into the usual fence construction in the assembly processes. Conveniently, the clamp body in the assembled state are substantially flush with the free ends of the side walls of the guide rail, resulting in a simple and reliable installation. The correct penetration depth into the profile can be easily accomplished and also directly controlled without a measuring tool. A clear appearance from the side to which the guide rail profile is attached to the grid mats is obtained when the guide rail in the region of the transition from one of the two side walls attached to the top of the grid mat, that this side wall with the center plane of the grid mat at an angle forms, the top of the guide rail is arranged substantially horizontally and the second side wall of the profile is perpendicular. Looking at the security fence from the other side, the skew of the angular side wall is partially obscured by the bars of the grid mat.

Preferably, the guide rail is materially connected directly to the flat fence element. For example, if the grid mats have vertical bars, the guide bar can be secured to the bars by welding. Their attachment can be so in the manufacturing process of Integrate mesh mats as it is attached to the mesh mats in the same manner as they are made. By integrating the attachment in the manufacturing process, a very cost-effective production of the security fence is given. In addition, it is thereby also possible to provide the guide rail with the same surface protection and the same color design, as the grid mats themselves, so that the security feature of the fence in the form of the cable occurs as little as possible. In order for the guide rail with the detection cable arranged therein to be sufficiently far enough away from the ground where the cable would otherwise be exposed to spray water and plant growth, the guide rail runs approximately 1 m in height. An even better function of the fence results when at least two horizontally extending guide rails are provided for cables, since vibrations of the fence can be measured at two different heights and compared with each other. In addition, two cables also mean redundancy and thus additional security. For example, the first cable guide runs in about 1 m height and the second cable guide in about 2.20 m height. By dividing the fence lengthwise into sectors, it is possible to represent on the central alarm unit an assignment of a break-in signal to a specific sector, so that defensive measures can be taken in a targeted manner. The sectors are formed, for example, in each case from one or more fence elements and fence posts, wherein control and control units are provided in certain fence posts that reinforce a signal generated in the associated sector by the or the detection cable signal optionally and evaluate and wirelessly to a central alarm unit or wired. This is especially true for a very large area to be protected advantageous. In order to be able to determine a manipulation of the fence post, for example, when the fence on the fence post, the movement can be provided in the fence post movement sensors.

In an alternative embodiment, the guide rail can be fixed in a form-fitting manner by a mounting element that can be connected to it on the flat fence element. The advantage is that it allows guide rails with detection cables to be attached to existing fences as well as to newly constructed fences. As a result, existing fences can be cheaply converted into security fences. The mounting member may be mounted or integrally formed on the guide rail, so that the guide rail can be attached to the fence elements easier because, for example, no small-scale components can be lost, which would be the case especially for retrofitting existing fences due to the partially unpaved terrain areas. The mounting element can also be attached to the guide rail with a material fit. This can be done under controlled conditions, for example in the manufacture of the guide rail. The attached mounting elements result in easier handling during transport and during attachment to the fence elements. The mounting element is welded, for example, to the guide rail to ensure a permanent grip. In the case of metallic materials, the welding of the mounting elements preferably takes place before the surface treatment. In order to keep the guide rail as safe as possible, additional brackets can be provided which hold the guide rail to the fence element. Preferably, the mounting element alone or together with the guide rail encloses a cavity partially having an opening for insertion of a horizontal grid mesh bar. The mounting element can thereby be pushed onto the horizontally extending rod. Suitably, the opening of the cavity is smaller than the dimension of the insertable grid mesh bar in the direction transverse to the insertion direction. When inserting the opening is elastically expanded short term, so that the introduced into the cavity rod is then held securely and permanently.

Particularly preferred is an embodiment in which the mounting element is a profile or a profile section with a U-shaped cross section, the side walls converge toward the opening, the opening is arranged to the side and the lower side wall is materially connected to the top of the guide rail. By the converging to its opening side walls of the rod is pressed into the profile, so that it is securely held even when punches or bumps on the profile. The mounting element may for example have the same profile cross-section as the guide rail. Thus, the production can be done with a single tool, since only one type of profile is used. In addition, this also the storage is simplified. The mounting element can have the same length as the guide rail as a continuous profile. To save material can be provided as a mounting element per guide rail segment and a plurality of profile sections, at the same time slightly larger effort of attaching the mounting elements on the guide rail.

In a further preferred embodiment, the mounting element for pressing the guide rail is formed on at least one horizontal grid mesh bar clip-shaped. The guide rail is pressed by the clamp against the grid mat rod and thus securely held. When using separate brackets, the guide rails can be secured independently of different distances of the horizontal grid mesh bars, since the brackets can be aligned with respect to the respective bar spacing, whereas preassembled holding elements can collide when holding elements are in place Grid mesh bar are located.

Preferably, the mounting member for engaging over the grid mesh rod has a bow-shaped first end. This can be clipped on, for example.

In a preferred embodiment, the mounting element for engaging over the two legs of the guide rail or for engaging over the one leg of the guide rail and simultaneous engagement in the opening of the guide rail is also bow-shaped at its second end. By embracing the guide rail or at least one leg of the guide rail it is pressed against the grid mesh rod and thus held securely. In order to clasp the rod and the guide rail with the mounting element, the mounting element can, for example, be elastically bent open and clipped. Conveniently, the mounting element is designed so that it can be removed only with great effort. In an attempt to manipulate or remove the guide rail with the cable attached, such a large force would have to be applied that it would be registered immediately by means of the detection cable. In order to better secure the mounting element after mounting on the guide rail and the mesh rod against unwanted removal, the ends may be bendable inwards. To avoid corrosion by damaging the surface of the element during assembly, for example by scratches, the mounting element may be made of stainless steel.

In a variant, it is provided that the mounting element for enclosing both the guide rail and a grid mat rod is to be pressed together annularly or partially annularly. By enclosing both elements a simple and permanent connection is possible. In order to be able to accommodate cables of different sizes in different sized guide rails, a security fence is suitable in which at least one horizontally extending mesh bar rod is a flat bar whose profile cross-section is arranged horizontally, wherein the mounting element at its first end the flat bar from the top of form-fitting holding overlaps. For example, engages the mounting element, engaging in the opening, at its second end of the one leg of the guide rail and presses the guide rail against the mesh rod. Instead of only engaging behind a leg, the mounting element at its second end, the base of the guide rail overlap positively engage and press the guide rail against the grid mesh bar. The flat grid mesh bar forms a sufficiently large underside for pressing guide rails in different sizes. By pressing on the bottom you get a more reliable grip of the guide rail on the fence element. To the mounting element of Hand to push without effort, the mounting element is preformed so that it can be pushed onto the mesh rod and the guide rail and can be pressed with a tool at least around the mesh rod and the guide rail around. The secure hold results in the pressing of the mounting element. For an efficient assembly process, the pressing can be done, for example with a special pliers, through which the minimum and the maximum contact pressure during pressing are adjustable.

Fig. 1

einen Sicherheitszaun mit Doppelstabmatten und einer Führungsschiene, die mit einem winkelförmigen Montageelement an einem Rundstab gehalten ist;

Fig. 2

einen Sicherheitszaun nach Fig. 1 mit einem U-förmigen Montageelement;

Fig. 3

einen Sicherheitszaun mit Flachstabmatten und einer Führungsschiene, die mit einem klammerförmigen Montageelement an einem Flachstab gehalten ist, und

Fig. 4

einen Sicherheitszaun nach Fig. 3 mit einem klammerförmigen Montageelement, das die Öffnung der Führungsschiene übergreift.

Hereinafter, with reference to the accompanying drawings, in which sections of a security fence are shown in vertical section, discussed in more detail on embodiments of the invention. Show it:

Fig. 1

a safety fence with double rod mats and a guide rail, which is held with an angle-shaped mounting member to a round rod;

Fig. 2

a security fence according to Figure 1 with a U-shaped mounting member.

Fig. 3

a safety fence with flat bar mats and a guide rail, which is held with a bracket-shaped mounting member to a flat bar, and

Fig. 4

a security fence according to Fig. 3 with a bracket-shaped mounting element which engages over the opening of the guide rail.

Fig. 1 shows in vertical section a section of a security fence with a double bar mat 12 with vertical Bars 12a and double horizontal bars 12b. Below the one double rod 12b is a downwardly open guide rail 14 with a U-shaped cross-section, in which a detection cable 16 is held by a clamping body 18. The guide rail 12 is folded, for example, from a steel sheet and has a first side wall 20, a second side wall 22 and a top 24. The guide rail 12 may also be prepared by other methods, for example by rolling, rolling or extrusion of a profile with a corresponding cross-section.

The side walls 20, 22 converge towards their opening. The first, designated 20 side wall forms with the top 24 of the guide rail 12 is a right angle, while the second side wall 22 with the top 24 forms an angle which is smaller than 90 ° and z. B. is 80 °. The cross section of the guide rail 12 and the clamping body 18 is dimensioned so that the pressed through the opening into the guide rail 12 and against the detection cable 16 clamping body 18 by the converging side walls 20, 22 in a pressure of the detection cable 16 with a certain minimum pressure against the Wall of the guide rail 12 locking position is held.

The clamp body 18 is a cylindrical rod portion and is made of steel. It is in the assembled state substantially flush with the free ends of the side walls 20, 22. If the guide rail 12 is already connected in the manufacture of lattice mats directly with these, it is expediently in the region of the transition from the second side wall 22 to the top 24 at welded to the bars of a grid mat, not shown, that the median plane of the In the present case, grid grid arranged on the right side forms an angle of approximately 5 to 15 ° with the side wall 22, wherein 10 ° for the impressing of a clamping body 18 results in a very favorable dimension. On the one hand, the inclination is large enough to prevent the emergence of a clamping body 18 in the installed state, but on the other hand, the inclination of the second side wall 22 and thus the ratio of the clear width at the point at which the clamping body 18 is in the mounted state, to the clear width at the narrowest point of the guide rail 12 sufficiently small so as not to have to bend the side walls too far when the clamp body 18 is inserted into the profile.

Upon movement of the fence, in particular in the form of vibration and structure-borne noise, the flat fence elements, ie the grid mats, transmit the movement to the U-shaped guide rail 12 so that it continues to transmit the movement to the detection cable 16, which generates a signal when moving , The detection cable 16 in the exemplary embodiment is a piezoelectric cable which generates a voltage when the fence moves. The detection cable is held pressed by the clamping body 18 at intervals against the inner wall of the guide rail 12. The contact pressure of the clamp body is indicated in the illustrated cross section by the intersection of the two circles, which are intended to represent the clamp body 18 and the cable 16. Instead of the rod sections, other shapes, such as balls, may be used, with those being particularly suitable for ease of installation where installation may be done without any special orientation or orientation. Since the insertion of the cable is preferably done after erection of the fence on site, are in all installation steps to consider the sometimes very unfavorable conditions on the construction site.

In the embodiment shown in Fig. 1, a mounting member 26 is welded to the upper side 24 of the guide rail 14. Alternatively, the mounting element 26 can also be formed during the production of the guide rail 14, for example by extrusion. The angular mounting member 26 encloses together with the top 24 of the guide rail 14 a cavity 28 having an opening for insertion of one of the two horizontally extending rods 12b. The opening of the cavity 28 is slightly smaller than the dimension of the cross section of the insertable mesh mat bar 12b in the direction transverse to the insertion direction. For even better grip, the opening may be narrowed after insertion of the grid bar 12b, for example, by manually bending the upper profile leg of the mounting member 26 with a pair of pliers. Since the attachment of the guide rail 14 by means of the mounting member 26 is positively, can also be used for the guide rail 14, other materials than those used for the fence elements, such as a plastic material having properties that are suitable for a movement and / or sound transmission suitable. In addition, brackets can be used to hold the guide rail 14 to the fence element as safe as possible.

Fig. 2 shows a double rod mat 12 of Fig. 1, but in which the diameters of the vertical and horizontal bars 12a and 12b are slightly smaller. On the upper side 24 of the guide rail 14 is provided as a mounting member 30 has a profile 32 with a substantially U-shaped cross section, whose side walls 34, 36 converge towards their opening. The opening is arranged to the side in the direction of the grid mat 12. The support of the rod 12b in the mounting member 30 can be improved by subsequent narrowing of the opening, for example by bending the upper leg end of the profile 32. The lower side wall 34 of the profile 32 is materially connected to the guide rail 14. Preferably, the connection takes place by means of spot welding. For cost-effective production, the mounting member 30 has the same profile cross-section as the guide rail 14. This requires only one tool for production. In addition, the handling and storage are simplified.

In Fig. 3, a flat bar mat 38 with vertical rods 38a and horizontal flat bars 38b is shown. Below the flat bar 38b, a guide rail 14 with a detection cable 16 is arranged. The guide rail is pressed by a clamp-shaped mounting member 40 against the flat bar 38b. The bracket-shaped mounting member 40 has a bow-shaped first end 42 which engages over the flat bar 38b and can be fastened thereto by clipping. The clamp-shaped mounting member 40 is likewise bow-shaped at its second end 44, engages over the one leg 20 of the guide rail 14 and projects into the opening of the profile of the guide rail 14. Preferably, the mounting member 40 is made of stainless steel.

4 shows a slightly modified embodiment of the mounting element according to FIG. 3. The guide rail 14 is held on the flat bar 38b by a mounting element 46, that this with its second end 48, the two legs 20, 22 of the guide rail 14 overlaps.

By a slight modification in the upper region, the mounting member 40 can be used even with a horizontal rod or two arranged at the same level on opposite sides of the vertical rods 38 a, horizontal rods of a double rod mat. In the latter case, the clip overlaps both horizontal rods. Instead of the part-ring-shaped mounting member 40 may of course also be a mounting member to be used with a ring to be closed during assembly form to hold the guide rail 14 on the horizontal flat bar 38b or a horizontal rod. In a further modification of the embodiments according to FIGS. 3 and 4, it is possible to fix the guide rail 14 by means of the mounting elements 40, 46 not below, but on a horizontal grid mat rod, wherein preferably the opening of the guide rail is covered by this.

By the mounting members 26, 30, 40, 46, the guide rails 14 can be attached to the detection cable 16 to flat fence elements. Consequently, existing fences without detection devices can be upgraded to safety fences. By the mounting members 26, 30, 40, 46 a secure and reliable hold of the guide rail 14 is ensured on the fence elements. As mentioned above, however, the guide rails can also be fastened directly to materially adhering to flat fence elements, for example by welding.

Claims (12)

Security fence with fence posts, sheet-like fence elements of grid mats (12; 38) and at least one detection cable (16) which is held by clamping body (18) in at least one U-shaped in cross-section, open at the bottom guide rail (14) made of metal, with horizontal profile to the flat fence elements (12, 38) is fastened, characterized in that the side walls (20, 22) of the U-shaped guide rail (14) converge towards its opening and the cross sections of the guide rail (14) and the clamping body ( 18) are dimensioned such that the through the opening into the guide rail (14) and against the detection cable (16) pressed clamping body (18) by the converging side walls (20, 22) in a pressure of the detection cable (16) with certain Minimum pressure against the wall (20, 22, 24) of the guide rail (14) are held captive position. A security fence according to claim 1, characterized in that a first side wall (20) of the guide rail (14) forms a right angle with its upper side (24), while the second side wall (22) forms an angle with the upper side (24) is as 90 °. Safety fence according to claim 1 or 2, characterized in that the detection cable (16) is a piezoelectric cable. Security fence according to one of claims 1 to 3, characterized in that the clamping bodies (18) are cylindrical bar sections. Security fence according to one of the preceding claims, characterized in that the guide rail (14) is materially connected directly to the flat fence element (12, 38). Safety fence according to one of Claims 1 to 4, characterized in that the guide rail (14) can be fixed in a form-fitting manner by means of a mounting element (26; 30; 40; 46) which can be connected to it on the flat fence element (12; A safety fence according to claim 6, characterized in that the mounting element (26; 30; 40; 46) alone or together with the guide rail (14) partially encloses a cavity (28) having an opening for insertion of a horizontal grid mesh bar (12b; 38b). having. Security fence according to claim 7, characterized in that the mounting element (26; 30; 40; 46) is a profile or profile section with a U-shaped cross-section, the side walls (34, 36) of which converge towards the opening, the opening towards the side is arranged and the lower side wall (34) with the upper side (24) of the guide rail (14) is materially connected. Security fence according to claim 6, characterized in that the mounting element (26; 30; 40; 46) for pressing the guide rail (14) against at least one horizontal grid mat rod (12b, 38b) is clamp-shaped. Security fence according to claim 9, characterized in that the mounting element (26; 30; 40; 46) for engaging over at least one grid mesh bar (12b; 38b) has a bow-shaped first end (42). Security fence according to claim 10, characterized in that the mounting element (26; 30; 40; 46) for reaching over the two legs (20, 22) of the guide rail (14) or for spreading over the one leg (20) of the guide rail (14) and simultaneous engagement in the opening of the guide rail (14) also at its second end (44) is bow-shaped. Security fence according to claim 6, characterized in that the mounting element (26; 30; 40; 46) for enclosing both the guide rail (14) and a grid mesh bar (12a; 38a) has an annularly closing shape.

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