EP0305100A1 - Eléments et structures de sécurité - Google Patents

Eléments et structures de sécurité Download PDF

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Publication number
EP0305100A1
EP0305100A1 EP88307577A EP88307577A EP0305100A1 EP 0305100 A1 EP0305100 A1 EP 0305100A1 EP 88307577 A EP88307577 A EP 88307577A EP 88307577 A EP88307577 A EP 88307577A EP 0305100 A1 EP0305100 A1 EP 0305100A1
Authority
EP
European Patent Office
Prior art keywords
security
hollow section
section
groove
members
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Withdrawn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
EP88307577A
Other languages
German (de)
English (en)
Inventor
Frederick Gerald Forfitt
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.)
DIRECTNEXT Ltd
Original Assignee
DIRECTNEXT 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
Priority claimed from GB878719600A external-priority patent/GB8719600D0/en
Priority claimed from GB878724637A external-priority patent/GB8724637D0/en
Application filed by DIRECTNEXT Ltd filed Critical DIRECTNEXT Ltd
Publication of EP0305100A1 publication Critical patent/EP0305100A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/154—Making multi-wall tubes
    • 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

  • This invention relates to security members and security structures, and to methods of making same.
  • An example of a security member to which the invention relates is a bar for a security barrier or grille.
  • a security member a security structure incorporating same, and a method of making a security member, as defined in the accompanying claims.
  • the invention also provides a security member, a security structure, and a method of making same, not limited by all features of any one particular claim hereof but comprising any feature disclosed herein providing a technical feature or advantage disclosed herein or which can be inferred from the disclosure herein.
  • Fig 1 shows a sheet 10 of mild steel or the like into which has been rolled three lengthwise-extending grooves 12, 14 and 16.
  • the section taken in Fig 1 is at right angles to the lengthwise direction of sheet 10.
  • Grooves 12, 14 and 16 extend parallel to each other and to the side edges 18, 20 of sheet 10. These edges are formed with chamfers 22, 24, which also extend lengthwise of the sheet.
  • the reference letters A, B, C identify, for convenient future reference, locations on the sheet (extending lengthwise) which correspond to the portions thereof which form the three corners of the triangle ABC, seen in Fig 3.
  • the grooves 12, 14 and 16 are rolled in the flat sheet material 10 prior to the forming step illustrated in Fig 2.
  • Fig 3 The next manufacturing step is illustrated in Fig 3. This step involves bending the section of Fig 2 through an angle of approximately 60 degrees at the location on base 30 identified by groove 14. This bending step brings edges 18, 20 into contact, thereby completi.ng the triangular section seen in Fig 3.
  • the chamfers 22, 24 define a groove 32 which enables a lengthwise seam weld to be conveniently formed, to unify the structure.
  • the final steps in the process of making the hollow section security member 34 seen in Fig 3 comprise welding in position in the grooves 12, 14 and 16, rods of tungsten carbide 36 which resist cutting of the security member by rod saws and the like. This welding operation is performed in a manner similar to that employed in prior art procedures.
  • a series of security bars 34 can be incorporated into a security structure, such as a grille.
  • the security members are usually arranged to extend lengthwise and parallel to each other at a spacing sufficiently close, for example, to prevent escape.
  • the preferred arrangement of the security bars or members 34 is such that,for example, the base walls CB of each security bar lie in a common plane, and the walls AC of successive bars lie in planes parallel to each other, and so too do the walls AB of successive bars.
  • the facing surfaces AB and AC of successive bars in the grille are non-parallel. Consequently, it is extremely difficult for an improvised screw jack to be effectively caused to act between successive bars, due to the slope of the facing surfaces.
  • Fig 4 shows a further embodiment representing a modification of that of Fig 3.
  • the generally triangular configuration of Fig 3 has been modified to a generally quadrilateral form designated by the reference letters WXYZ, in which the sides XY and YZ correspond to the sides AB and BC of the preceding embodiment.
  • the sides XW and WZ and ZY are arranged generally at right angles to each other, with side XY inclined as in the Fig 3 embodiment.
  • a side XZ has been indicated in dotted lines, corresponding to the side AC in Fig 3, for comparison purposes, but is of course not present in practice.
  • the security member 40 of Fig 4 is constructed in an exactly analagous manner to that of Figs 1 to 3 but with slightly modified bending procedures followed by welding the groove 42 and welding the tungsten carbide rods 44.
  • This security bar is principally intended for use as the end one of a series of security bars forming a grille or barrier, the generally right-angled portion of the cross-­section is beneficial for purposes of incorporation into a frame or support of concrete or other material.
  • the side ZY of bar 40 would be arranged in a common plane with the sides CB of the triangular section of the security members.
  • the disposition of side XY of security bar 40 relative to side AC of the adjacent security bar 34 would be such as to prevent, or inhibit, screw-jacking in the manner already described above.
  • the security members are easy to manufacture.
  • the basic sheet material 10 can be readily rolled with the grooves, in an inexpensive manner.
  • the subsequent bending steps are readily carried out to produce polygonal sections which are strong and, by virtue of their relative dispositions, are extremely difficult to bend.
  • a grille or barrier constructed from the security bars has a very high structural integrity while retaining the desired relatively low manufacturing cost.
  • the above described method of making hollow section security members constitutes one of two main aspects of the inventive material disclosed herein.
  • the cutting resistant material is located in lengthwise grooves. These grooves are formed in the material prior to forming the hollow sections.
  • the preferred embodiment is to roll the grooves into flat sheets and then to form these into a triangular or quadrilateral section. The technique could be applied to round and other sections.
  • the other aspect of the invention described above relates to the relative dispositions of the security members when incorporated into a security barrier such as a grille.
  • the slots in the sheet material may be formed by any suitable mechanical means, including broaching, planing, milling as well as by rolling, though the latter is preferred. These operations can be performed on the material in hot or cold form.
  • the polygonal shapes disclosed may be modified. The triangular section seen in Fig 3 need not be equilateral, it could be isosceles or less regular.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP88307577A 1987-08-19 1988-08-16 Eléments et structures de sécurité Withdrawn EP0305100A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB878719600A GB8719600D0 (en) 1987-08-19 1987-08-19 Security members
GB8719600 1987-08-19
GB8724637 1987-10-21
GB878724637A GB8724637D0 (en) 1987-10-21 1987-10-21 Security members & structures

Publications (1)

Publication Number Publication Date
EP0305100A1 true EP0305100A1 (fr) 1989-03-01

Family

ID=26292621

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88307577A Withdrawn EP0305100A1 (fr) 1987-08-19 1988-08-16 Eléments et structures de sécurité

Country Status (1)

Country Link
EP (1) EP0305100A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2254356A (en) * 1991-04-05 1992-10-07 Dixons Group Plc Cut-resistant roller shutter
WO2009093273A1 (fr) * 2008-01-23 2009-07-30 Trentino Sviluppo S.P.A. Élément de raccordement pour panneaux

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422525A (en) * 1966-06-13 1969-01-21 Svenska Flaektfabriken Ab Manufacturing tubular duct sections
US3552938A (en) * 1969-01-21 1971-01-05 C M Windows & Stained Glass Lt Security steel members with carbide inserts
EP0105514A2 (fr) * 1982-10-04 1984-04-18 Albert Baum Dispositif pour la consolidation des puits de bâtiment contre l'effraction
GB2176526A (en) * 1985-06-12 1986-12-31 Chubb Security Installations Security bars

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422525A (en) * 1966-06-13 1969-01-21 Svenska Flaektfabriken Ab Manufacturing tubular duct sections
US3552938A (en) * 1969-01-21 1971-01-05 C M Windows & Stained Glass Lt Security steel members with carbide inserts
EP0105514A2 (fr) * 1982-10-04 1984-04-18 Albert Baum Dispositif pour la consolidation des puits de bâtiment contre l'effraction
GB2176526A (en) * 1985-06-12 1986-12-31 Chubb Security Installations Security bars

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2254356A (en) * 1991-04-05 1992-10-07 Dixons Group Plc Cut-resistant roller shutter
WO2009093273A1 (fr) * 2008-01-23 2009-07-30 Trentino Sviluppo S.P.A. Élément de raccordement pour panneaux
US8443561B2 (en) 2008-01-23 2013-05-21 Trentino Sviluppo S.P.A. Connecting element for panels

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