EP0108553A2 - Sicherheitsstäbe - Google Patents

Sicherheitsstäbe Download PDF

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Publication number
EP0108553A2
EP0108553A2 EP83306499A EP83306499A EP0108553A2 EP 0108553 A2 EP0108553 A2 EP 0108553A2 EP 83306499 A EP83306499 A EP 83306499A EP 83306499 A EP83306499 A EP 83306499A EP 0108553 A2 EP0108553 A2 EP 0108553A2
Authority
EP
European Patent Office
Prior art keywords
bar
skin
core
bar according
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP83306499A
Other languages
English (en)
French (fr)
Other versions
EP0108553A3 (de
Inventor
Raymond Leonard Sands
David Christopher Willis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gunnebo UK Ltd
Original Assignee
Chubb and Sons Lock and Safe Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chubb and Sons Lock and Safe Co Ltd filed Critical Chubb and Sons Lock and Safe Co Ltd
Publication of EP0108553A2 publication Critical patent/EP0108553A2/de
Publication of EP0108553A3 publication Critical patent/EP0108553A3/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/01—Grilles fixed to walls, doors, or windows; Grilles moving with doors or windows; Walls formed as grilles, e.g. claustra

Definitions

  • the present invention relates to security bars which may be made up into grilles or gratings eg to cover the window openings in security buildings for protection against intrusion or escape, for use as glazing bars or mullions in security applications, or for use more generally in the field of security grilles and shutters.
  • An aim of the invention is to provide a security bar having high resistance to both bending and cutting and, in particular, superior resistance to attack with metal-cutting saws or files than is the case with traditional steel window bars.
  • the invention proposes a composite form of bar comprising a core of a steel or other material having high resistance to bending surrounded by a layer which comprises elements of very hard material bound in a cast matrix.
  • the bending-resistant core is disposed within and spaced from an outer finishing skin and the matrix which binds the very hard elements is cast in situ within the space defined between the core and skin.
  • Figure I shows part of a masonry wall 1 having a window opening 2, and let in to this opening is a grating comprising a plurality of parallel bars 3 held in a steel frame 4.
  • the bars 3 are designed to offer high resistance to intrusion or escape through the grating either by bending the bars apart or by cutting them through eg with carbide-coated rod- or hack-saws or files, and each one is of the general form indicated in Figure 2.
  • the bar 3 is seen to be of composite construction comprising a central core 5, an outer finishing skin 6 and a hard layer 7 filling the space between the core and skin.
  • the core 5 provides most of the bar's resistance to bending and is preferably made from steel of a type which can be given a high elastic limit, it being resistance to plastic (ie permanent) deformation which is of importance in the context of a bar provided for the above- mentioned purpose.
  • the steel may be given a hard surface layer and the characteristics of the surface hardening method may influence the choice of steel.
  • the possibilities include a low carbon, substantially unalloyed, steel bar in which a high yield strength has been induced by "cold working"; carbon steels which can be given a high surface hardness by an induction or flame hardening method; and low alloy steels which can be through-hardened to provide a high yield strength and this treatment combined, if necessary, with a hardened surface, (the latter may be suitable for surface hardening by carburising or nitriding treatments followed by a heat treatment to impart high strength to the steel interior).
  • the filling 7, which provides most of the resistance to cutting, is itself a composite material, comprising elements 8 of a very hard material (preferably in excess of 1000kg/mm 2 , or 7 on the Moh scale) bound in a cast matrix 9.
  • the hard material 8 will typically be an oxide, silicate or carbide whether synthetic or natural. More particularly, alumina or silicon carbide particles are presently preferred. These particles should be in the form of dense nuggets of high quality, such as may be made by fusion or sintering processes.
  • the matrix material 9 contains, supports and bonds the hard elements 8 in a homogeneous mass, and is preferably formed from a rigidly-setting polymer or an inorganic hydraulic cementitious material.
  • the nuggets 8 will be placed into the space defined between the core 5 and skin 6, suitably mounted in jigs, and then the liquid resin together with a catalytic hardener (or the wet cement paste) will be cast in to fill the interstices between the nuggets, core and skin.
  • the nuggets and matrix material might be p r e-mixed and cast together into the space between the core and skin.
  • a cold setting matrix material is preferred in order to avoid any thermal distortion or discolouration of the relatively thin skin 6.
  • the hard elements 8 it is possible for the hard elements 8 to be cast with a molten metal matrix material, eg aluminium, if desired.
  • the material of the outer skin 6 should be corrosion resistant and readily formable to the required section, and in the finished bar should have a smooth external surface to aid the detection of damage.
  • the preferred material in this respect is a stainless steel or aluminium alloy.
  • bars in accordance with the invention may be made in a simple circular form with the outer skin concentric with the core
  • the elongate cross-sectional form indicated in Figure 2 is considered to represent a more optimum solution to the conflicting requirements of maximum security and reasonable daylight transmission between the spaced bars.
  • the orientation of the bars in the grating is such that from the viewpoint of Figure 2 the upper part of the figure represents the inside of the building and the lower part represents the outside.
  • the elongate form of bar increases the area of material which has to be cut through in comparison with a circular bar of the same width (that is the cross-sectional dimension of the bar in the plane of the grating).
  • the outer skin 6 may in itself contribute little to the structural strength or resistive properties of a bar 3 it is of value in shielding the layer 7 from attack by other (non-cutting) forms of tool to which that layer may be more vulnerable, and it is important therefore that the skin 6 should not be readily detachable from the rest of the bar.
  • Figures 3a and 3b show variations of the Figure 2 cross section in accordance with this concept, where portions 10 of the skin are profiled to project into the hard filling space.
  • Figure 3c shows an example with outward projections 11 for the same purpose, and of course combinations of inward and outward projections may also be adopted.
  • FIG. 4a shows an example with L-shaped rod anchors 12 welded to the skin at intervals along the length of the bar;
  • Figure 4b shows alternative hoop anchors 13 welded across internal corners of the skin;
  • Figure 4a shows anchors 14 integral with the skin along the whole length of the bar, where the skin and anchors are formed together in an extruded section.
  • Figure 5 shows a further variant of the bar where the steel core 5' in this case is tubular and contains a second hard filling 15.
  • This filling may be similar to the composite filling 7, perhaps containing even harder elements such as sintered tungsten carbide.
  • the space within a tubular core may contain rotatable bodies such as rods or balls of hardened steel or ceramics, to frustrate attempts to saw or file through the core.
  • a wire or other form of detector may be contained within the structure of the bar, and the use of a cold castable filling 7 makes it easy to incorporate a detector within the space between the core 5 and skin 6 at the time of manufacture.
  • Figure 6 indicates a simple example with a single detector wire 16 provided in the filling 7, so that an alarm is triggered if the wire is severed by an attempt to cut the bar.
  • Wires embedded in the rigid cast matrix can also be arranged to fracture if the bar is deformed and will therefore detect bending as well as cutting.
  • More complex detection systems may be employed with the'detector elements provided within a tubular core such as 5' instead of, or as well as, within the filling 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Laminated Bodies (AREA)
  • Building Environments (AREA)
EP83306499A 1982-11-05 1983-10-26 Sicherheitsstäbe Withdrawn EP0108553A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8231628 1982-11-05
GB8231628 1982-11-05

Publications (2)

Publication Number Publication Date
EP0108553A2 true EP0108553A2 (de) 1984-05-16
EP0108553A3 EP0108553A3 (de) 1984-09-05

Family

ID=10534050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83306499A Withdrawn EP0108553A3 (de) 1982-11-05 1983-10-26 Sicherheitsstäbe

Country Status (8)

Country Link
EP (1) EP0108553A3 (de)
AU (1) AU2091383A (de)
GB (1) GB2129859B (de)
HK (1) HK73487A (de)
IE (1) IE54660B1 (de)
MY (1) MY8700657A (de)
SG (1) SG28987G (de)
ZA (1) ZA838121B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3700449A1 (de) * 1987-01-09 1988-07-28 Johannes Heyen Verfahren zum schutz von hochspannungsmasten gegen sabotage
DE9210896U1 (de) * 1992-08-14 1992-10-29 Saelzer Sicherheitstechnik Gmbh, 3550 Marburg, De
WO1994010419A1 (de) * 1992-10-31 1994-05-11 Bau-Und Maschinenschlosserei Herwart Lohr Vorrichtung zur befestigung eines gitterrahmens
DE19625656A1 (de) * 1996-06-26 1998-01-02 Sommer Metallbau Stahlbau Gmbh Objektsicherungsgitter
EP0973982A1 (de) * 1997-03-07 2000-01-26 Supersafe Ltd. Strukturelles schutzverfahren und -vorrichtung
EP1561895A2 (de) * 2004-02-06 2005-08-10 Castagna, Annunzio Schnittsichere Stange
JP2020186524A (ja) * 2019-05-10 2020-11-19 株式会社アルファ バーロック装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100387896C (zh) * 2005-11-18 2008-05-14 李峰 一种具有加强结构的复合不锈钢条及其制造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1504677A (en) * 1923-05-09 1924-08-12 Charles R Carter Metal bar
US3552938A (en) * 1969-01-21 1971-01-05 C M Windows & Stained Glass Lt Security steel members with carbide inserts
DE7112516U (de) * 1971-10-14 Kreuzlingen W Sicherheitsgitter
DE2653056B2 (de) * 1976-11-23 1980-09-11 Bochumer Eisenhuette Heintzmann Gmbh & Co, 4630 Bochum Schutzvorrichtung für die Luftdurchtrittsbereiche von Räumen oder Gebäuden
DE2925624A1 (de) * 1979-06-26 1981-01-15 Geiger Maschf Helmut Sicherheitsrechenrost
DE7922696U1 (de) * 1979-08-08 1981-05-21 Fipke, Boris Vorrichtung zur sicherung von insbesondere lichtschaechten o.dgl. gegen einbruch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1567717A (en) * 1977-12-30 1980-05-21 Pentagon Ind Ltd Security window unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7112516U (de) * 1971-10-14 Kreuzlingen W Sicherheitsgitter
US1504677A (en) * 1923-05-09 1924-08-12 Charles R Carter Metal bar
US3552938A (en) * 1969-01-21 1971-01-05 C M Windows & Stained Glass Lt Security steel members with carbide inserts
DE2653056B2 (de) * 1976-11-23 1980-09-11 Bochumer Eisenhuette Heintzmann Gmbh & Co, 4630 Bochum Schutzvorrichtung für die Luftdurchtrittsbereiche von Räumen oder Gebäuden
DE2925624A1 (de) * 1979-06-26 1981-01-15 Geiger Maschf Helmut Sicherheitsrechenrost
DE7922696U1 (de) * 1979-08-08 1981-05-21 Fipke, Boris Vorrichtung zur sicherung von insbesondere lichtschaechten o.dgl. gegen einbruch

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3700449A1 (de) * 1987-01-09 1988-07-28 Johannes Heyen Verfahren zum schutz von hochspannungsmasten gegen sabotage
DE9210896U1 (de) * 1992-08-14 1992-10-29 Saelzer Sicherheitstechnik Gmbh, 3550 Marburg, De
WO1994010419A1 (de) * 1992-10-31 1994-05-11 Bau-Und Maschinenschlosserei Herwart Lohr Vorrichtung zur befestigung eines gitterrahmens
EP0965800A3 (de) * 1996-06-26 2000-06-28 Sommer Metallbau-Stahlbau GmbH & Co. KG Objektsicherungsgitter
EP0965800A2 (de) * 1996-06-26 1999-12-22 Sommer Metallbau-Stahlbau GmbH & Co. KG Objektsicherungsgitter
DE19625656A1 (de) * 1996-06-26 1998-01-02 Sommer Metallbau Stahlbau Gmbh Objektsicherungsgitter
DE19625656C2 (de) * 1996-06-26 2001-02-22 Sommer Metallbau Stahlbau Gmbh Objektsicherungsgitter
EP0973982A1 (de) * 1997-03-07 2000-01-26 Supersafe Ltd. Strukturelles schutzverfahren und -vorrichtung
EP0973982A4 (de) * 1997-03-07 2002-10-16 Supersafe Ltd Strukturelles schutzverfahren und -vorrichtung
EP1561895A2 (de) * 2004-02-06 2005-08-10 Castagna, Annunzio Schnittsichere Stange
EP1561895A3 (de) * 2004-02-06 2006-06-21 Annunzio Castagna Schnittsichere Stange
JP2020186524A (ja) * 2019-05-10 2020-11-19 株式会社アルファ バーロック装置
JP7263108B2 (ja) 2019-05-10 2023-04-24 株式会社アルファ バーロック装置

Also Published As

Publication number Publication date
GB2129859A (en) 1984-05-23
MY8700657A (en) 1987-12-31
ZA838121B (en) 1984-06-27
AU2091383A (en) 1984-05-10
EP0108553A3 (de) 1984-09-05
GB2129859B (en) 1986-09-17
IE54660B1 (en) 1989-12-20
GB8328652D0 (en) 1983-11-30
HK73487A (en) 1987-10-16
IE832522L (en) 1984-05-05
SG28987G (en) 1987-07-10

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19850302

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Effective date: 19860430

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SANDS, RAYMOND LEONARD

Inventor name: WILLIS, DAVID CHRISTOPHER