EP0899406A2 - Récipient de sécurité. - Google Patents

Récipient de sécurité. Download PDF

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Publication number
EP0899406A2
EP0899406A2 EP98306526A EP98306526A EP0899406A2 EP 0899406 A2 EP0899406 A2 EP 0899406A2 EP 98306526 A EP98306526 A EP 98306526A EP 98306526 A EP98306526 A EP 98306526A EP 0899406 A2 EP0899406 A2 EP 0899406A2
Authority
EP
European Patent Office
Prior art keywords
back wall
resin
side walls
hard material
base
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Withdrawn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
EP98306526A
Other languages
German (de)
English (en)
Other versions
EP0899406A3 (fr
Inventor
Raymond Leonard Sands
Anthony John Skelton
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
Chubb Research 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, Chubb Research Ltd filed Critical Chubb and Sons Lock and Safe Co Ltd
Publication of EP0899406A2 publication Critical patent/EP0899406A2/fr
Publication of EP0899406A3 publication Critical patent/EP0899406A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05G—SAFES OR STRONG-ROOMS FOR VALUABLES; BANK PROTECTION DEVICES; SAFETY TRANSACTION PARTITIONS
    • E05G1/00—Safes or strong-rooms for valuables
    • E05G1/02—Details
    • E05G1/024—Wall or panel structure

Definitions

  • the present invention relates to the manufacture of thief-resistant safes or the like security receptacles which incorporate in their structure a composite penetration-resistant barrier material comprising elements of hard material bound together by a cast elastomeric matrix.
  • Barrier materials of the above kind are known e.g. from GB-A-1427033, GB-A-1513609, DE-A-3241526 and GB-A-2197362.
  • low-cost fillers such as sand or gravel in the elastomeric matrix.
  • an "expanded" that is to say foamed or microcellular, elastomer is used in place of the "solid" elastomer as the matrix material.
  • grades of expanded polyurethane with a porosity of up to 70% can perform adequately as the matrix material.
  • the mass of elastomer in the matrix can therefore be much reduced, with corresponding reduction of the material cost.
  • the processing time for an expanded elastomer is also more rapid and the plant requirements are less than in the case of the solid material.
  • the weight of the finished product is also reduced somewhat.
  • the amount of elastomer needing to be recovered during any eventual recycling is much reduced.
  • Expanded elastomers are produced by use of suitable foaming agents in their reactive components.
  • expanded polyurethane can be produced by the inclusion of water in the polyol component which reacts with the isocyanate to generate CO 2.
  • expanded polyurethane matrices for a composite barrier material of the above kind can be successfully cast either horizontally or vertically, that is to say (i) where the material is permitted to expand in a horizontal plane but to a required thickness which is small relative to the horizontal dimensions of the volume occupied, or (ii) where the material is constrained to expand upwardly in a vertical plane but to a required width which is small relative to the height of the volume occupied.
  • No economical system of precursor chemistry has yet been found, however, which will give controlled expansion, in the desired density range, throughout the combination of vertical and horizontal dimensions that would be required to cast the matrix for the body of a safe, from a single point of entry.
  • a safe body can be viewed as a five-sided open box structure, that is to say a top wall, base wall, back wall and two side walls, with an open front to receive the safe door. It is traditional, in the case of high quality safes, to cast the barrier material (or at least the matrix in the case of a composite barrier material) into the safe body in a single operation to form a monolithic "bell" structure conforming to the shape of the aforesaid five sides of the body. This avoids the occurrence of joints in the barrier material, which could constitute a security weakness.
  • the present invention seeks to provide methods for the manufacture of a safe body using a composite barrier material with an expanded elastomer matrix which can achieve as far as possible a similar "bell" structure.
  • the present invention resides in a method for manufacturing the body of a safe comprising a top wall, base wall, back wall and two side walls, the method comprising the steps of: (i) providing a hollow structure to define the inner and outer surfaces of said top, base and side walls and the inner surface of said back wall; (ii) supporting said hollow structure with its portion corresponding to the front of the safe body lowermost; (iii) placing into said structure elements of hard material to occupy those portions corresponding to said top, base and side walls and optionally that portion corresponding to said back wall; (iv) directing into the lower region of said structure (as thus orientated) a quantity of resin to form an expanded elastomer; (v) allowing said resin to expand upwardly to form a matrix of expanded elastomer through the interstices between said elements of hard material within those portions of said structure corresponding to said top, base and side walls; (vi) if not done so at step (iii), placing elements of hard material into said structure to occupy that
  • the invention resides in a method for manufacturing the body of a safe comprising a top wall, base wall, back wall and two side walls, the method comprising the steps of: (i) providing a hollow structure to define the inner and outer surfaces of said top, base and side walls; (ii) supporting said hollow structure with its portion corresponding to the front of the safe body lowermost; (iii) placing into said structure elements of hard material to occupy those portions corresponding to said top, base and side walls; (iv) directing into the lower region of said structure (as thus orientated) a quantity of resin to form an expanded elastomer; (v) juxtaposing to the top of said structure (as thus orientated) a panel to form said back wall of the safe body, said panel including a composite barrier material comprising elements of hard material bound together by a cast matrix of expanded elastomer; and (vi) allowing said resin of step (iv) to expand upwardly to form a matrix of expanded elastomer through the interstices between said
  • the invention resides in a method for manufacturing the body of a safe comprising a top wall, base wall, back wall and two side walls, the method comprising the steps of: (i) providing a hollow structure to define the inner and outer surfaces of said top, base and side walls and the inner surface of said back wall; (ii) supporting said hollow structure with its portion corresponding to the front of the safe body lowermost; (iii) placing into said structure elements of hard material to occupy those portions corresponding to said top, base and side walls and optionally that portion corresponding to said back wall; (iv) directing into the upper region (as thus orientated) of that portion of said structure corresponding to said top, base and side walls a quantity of resin to form an expanded elastomer and allowing said resin to flow towards the lower region thereof but not into that portion corresponding to said back wall; (v) if not done so at step (iii), placing elements of hard material into said structure to occupy that portion corresponding to said back wall; (vi) directing
  • this method also includes the step, after step (vi), of applying to said structure a further structure to define the outer surface of said back wall, where said further structure constrains the expansion of said resin such that the density of the resultant expanded elastomer is higher than the free rise density thereof.
  • a structure 1 which may for example be fabricated from sheet steel or moulded in glass-reinforced plastics and comprises the inner and outer finishing skins 2 and 3 of the two side walls, top wall and base wall of a safe body, together with the inner finishing skin 4 of the back wall.
  • a rebated door opening 5 is defined around the front edges of the side, top and base walls.
  • the structure 1 is supported in a suitable jig (not shown) with the door opening 5 lowermost and, as shown in Figure 2, the space between the two skins 2 and 3 which forms the side, top and base walls of the safe body is filled with loose nuggets 6 (not drawn to scale) of a hard and refractory material which in the finished product will provide resistance to attack by means of mechanical and thermal cutting tools.
  • the chosen material may be any one of the materials well known for this purpose in the manufacture of thief-resistant safes, such as sintered or fused alumina or zirconia, Turkish Emery or other minerals such as quartzite, granite or basalt, or other granular materials such as silicon carbide.
  • respective tubes 7 are positioned within each of those wall spaces for the subsequent step of resin injection.
  • a measured quantity of mixed polyurethane resin 9 is injected into the lower region of the space between the two skins 2 and 3. As schematically indicated in Figure 3, this is pumped into the structure from a conventional mixing head 8 fed with the respective polyol and isocyanate components of the resin, and which is connected to the tubes 7 to distribute the resin evenly into each of the four nugget-filled wall spaces.
  • the tubes 7 are then withdrawn.
  • the polyol includes a foaming agent and the quantities are so chosen that the resin 9 foams upwardly through the interstices between the nuggets 6 in the space between the skins 2 and 3 to a height corresponding to that of the rear wall skin 4.
  • there thus results a matrix of expanded polyurethane 9' which when fully cured will strongly bind the nuggets 6 together and to the skins 2 and 3 in the side, top and base walls of the safe body.
  • a measured quantity of mixed polyurethane resin (not shown) is injected into that space through the tube 11 from a conventional mixing head 12 fed with the respective polyol and isocyanate components.
  • the polyol includes a foaming agent, and in this case the quantities are so chosen that the resin expands through the interstices between the nuggets 10 to fill the remaining space to the height of that layer of nuggets.
  • the porosity of the expanded polyurethane in the matrices 9' and 13 is preferably at least 30% but not more than 70%.
  • the optimum density valve depends upon the specific grade of product, but will preferably be within the range 450 to 600 kg/m 3 .
  • the polyurethane formulation need not be the same in each case, however, and indeed the first injection will be optimised for the deep foaming required to fill the side, top and base walls of the body (vertical casting) while the second injection will be optimised for the wider but shallower foaming required to fill the back wall (horizontal casting).
  • the whole of the space within the structure 1 - i.e. corresponding to the side, top, base and back walls - is filled with the hard nuggets 6/10 in one operation, together with the installation of the tubes 7 and 11, at the Figure 2 stage.
  • the subsequent polyurethane injection is still accomplished in two stages (Figs. 3 and 6), however.
  • the back wall of the safe is prepared separately, however.
  • the back wall 15 comprises a plate 16 upon which a composite barrier material comprising hard and refractory nuggets 17 bound within an expanded polyurethane (elastomer) matrix 8 has been formed.
  • This can be prepared by placing the plate in a suitable mould form, filling with the nuggets 17 and then casting in the resin, (which need not be the same as resin 9), to form the matrix 18.
  • the tubes 7 are withdrawn and the prepared back wall 15 is brought into place.
  • the back wall 15 is held in the jig in its correct final position relative to the structure 1 while the resin foams up between the skins 2 and 3 to form the matrix 9' ( Figure 10) in the side, top and base walls of the body (provision will be made for venting air displaced from the space between the skins 2 and 3 as the polyurethane rises).
  • the polyurethane 18 of the back wall 15 is still sufficiently fresh when assembled with the structure 1, the polyurethane cast in-situ as the matrix 9' can bond to it sufficiently strongly to resist separation of the back wall as a whole in an attack upon the safe.
  • the back wall 15 may be provided with mechanical anchors such as perforated or convoluted metal strips (not shown) which extend from that wall into the space between the skins 2 and 3 and become embedded in the matrix 9' when the latter is formed.
  • This second embodiment of the invention where the back wall is prepared separately from the remainder of the safe body may be found preferable when safes are made on a flow line to achieve manufacturing efficiencies, as only one polyurethane injecting operation need take place actually on the flow line. It is also particularly advantageous in the case of safes designed as enclosures for automated teller machines (ATMs). Such an enclosure must be provided with apertures through its back wall (i.e. the wall which is in practice presented to the customers) to dispense money and take in deposits and special measures must be taken to design in and adequately protect these apertures.
  • ATMs automated teller machines
  • the second embodiment of the present invention therefore provides a convenient way in which a range of different safes configured to particular ATM designs can be produced by using different backs on an otherwise common body structure.
  • FIG. 11-14 A further embodiment of the invention will now be described with references to Figures 11-14.
  • the structure 1 of Figure 1 is prepared and supported as before, and the whole of the hollow space, i.e. corresponding to the sides, top, base and back wall of the safe, is filled with loose nuggets 19 of hard and refractory material.
  • No tubes are installed in this case but, as shown in Figure 11, a rectangular frame 20 constructed from thin metal plate is temporarily positioned over the inner skin 4 of the back wall, to segregate the top of the structure into a central portion above the skin 4 and an outer ring above the space between the skins 2 and 3.
  • a measured quantity of mixed polyurethane resin (not shown) is poured from above the structure into the space between the skins 2 and 3.
  • this is accomplished by traversing a mixing head 21 around the top of the structure, to the outside of the frame 20, perhaps making several revolutions, while the mixed resin, containing a foaming agent, is dispensed at a predetermined rate.
  • the passage of the mixing head is timed so that the requisite quantity of resin passes into the outer ring of the structure, evenly distributed around the four wall spaces.
  • the resin percolates down between the nuggets 19 under gravity, into the space between the skins 2 and 3, the frame 20 serving to ensure that none of it spills into the segregated space above the skin 4.
  • the frame 20 is then removed and immediately afterwards a second measured quantity of the same or a different resin (not shown) is poured from the mixing head 21 into the top of the structure, as indicated in Figure 13.
  • the head 21 may be traversed around the whole of the top of the structure to evenly distribute the resin into the space which will form the back wall of the safe.
  • a back finishing skin 22 is then positioned to the structure as shown in Figure 14, and firmly held in place in the jig while the resin foams.
  • the nuggets 19 could be placed in the segregated portion corresponding to the back wall only after the first foaming has been effected. This single shot casting embodiment is most convenient.
  • the quantities of resin poured in at the Figures 12 and 13 stages are chosen so that they will collectively expand to form a matrix 23 of selected density filling the interstices between the nuggets 19 in the whole of the safe body structure. More particularly, the first quantity is chosen to fill the side, top and base walls at this density up to the level of the skin 4 while the second quantity is chosen to fill the back wall.
  • the resin in this case is chosen to have a free rise density less than the desired density of the matrix material. In other words, where it not for the application of the back panel 22 before the material foams, it would expand to the extent of overflowing from the structure. Vent holes are provided in the structure to allow displaced air to escape while the material is initially expanding, but these are plugged as soon as the polyurethane reaches them.
  • the effect of constraining the expansion of the polyurethane in this way is to improve the homogeneity of the resultant matrix material, i.e. tends to equalise the cell size in the matrix throughout the structure.
  • the free rise density of the material used in this process is preferably within the range 200-250 kg/m 3 , most preferably around 230 kg/m 3 .
  • the resultant homogeneous matrix 23 strongly binds the nuggets 19 together and to the skins 2, 3, 4 and 22.
  • the skin 22 may be provided with welded-on mechanical anchors (not shown) such as perforated or convoluted metal strips projecting into the mass of matrix material in the back wall of the safe.
  • welded-on mechanical anchors such as perforated or convoluted metal strips projecting into the mass of matrix material in the back wall of the safe.
  • an adhesive primer to provide a chemical bond. This is in addition to, or instead of, use of the anchors etc mentioned above.
  • any of the finishing skins such as 1, 2, 4, 14, 17 or 22 in the above-described embodiments to be dispensed with and to replace them with mould forms against which the polyurethane is cast to define the relevant external surfaces of the safe body.

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  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP98306526A 1997-08-23 1998-08-17 Récipient de sécurité. Withdrawn EP0899406A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9717838 1997-08-23
GBGB9717838.8A GB9717838D0 (en) 1997-08-23 1997-08-23 Security receptacles

Publications (2)

Publication Number Publication Date
EP0899406A2 true EP0899406A2 (fr) 1999-03-03
EP0899406A3 EP0899406A3 (fr) 2000-02-02

Family

ID=10817892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98306526A Withdrawn EP0899406A3 (fr) 1997-08-23 1998-08-17 Récipient de sécurité.

Country Status (2)

Country Link
EP (1) EP0899406A3 (fr)
GB (1) GB9717838D0 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002090700A1 (fr) 2001-05-03 2002-11-14 Hyperlast Limited Panneau de securite
EP4311906A1 (fr) * 2022-07-29 2024-01-31 NCR Corporation Coffre-fort recyclable

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1427033A (en) 1972-02-05 1976-03-03 Feldmuehle Anlagen Prod Wall element
GB1513609A (en) 1976-10-11 1978-06-07 Feldmuehle Ag Wall element for safes and the like
DE3241526C1 (de) 1982-11-10 1983-12-22 Verschleißtechnik Dr.-Ing. Hans Wahl GmbH & Co, 7302 Ostfildern Füllung für Tresorwände, Auskleidungselemente von Tresoren oder dergleichen
GB2197362A (en) 1986-11-07 1988-05-18 Chubb & Sons Lock & Safe Co Security door or wall panel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991007562A1 (fr) * 1989-11-13 1991-05-30 Cornelis Elizabeth Rijlaarsdam Coffre-fort

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1427033A (en) 1972-02-05 1976-03-03 Feldmuehle Anlagen Prod Wall element
GB1513609A (en) 1976-10-11 1978-06-07 Feldmuehle Ag Wall element for safes and the like
DE3241526C1 (de) 1982-11-10 1983-12-22 Verschleißtechnik Dr.-Ing. Hans Wahl GmbH & Co, 7302 Ostfildern Füllung für Tresorwände, Auskleidungselemente von Tresoren oder dergleichen
GB2197362A (en) 1986-11-07 1988-05-18 Chubb & Sons Lock & Safe Co Security door or wall panel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002090700A1 (fr) 2001-05-03 2002-11-14 Hyperlast Limited Panneau de securite
EP4311906A1 (fr) * 2022-07-29 2024-01-31 NCR Corporation Coffre-fort recyclable
US12553275B2 (en) 2022-07-29 2026-02-17 Ncr Atleos Corporation Recyclable safe

Also Published As

Publication number Publication date
GB9717838D0 (en) 1997-10-29
EP0899406A3 (fr) 2000-02-02

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