GB2210653A

GB2210653A - Security door

Info

Publication number: GB2210653A
Application number: GB8823513A
Authority: GB
Inventors: Vincent Anthony Dooley
Original assignee: TENERET Ltd
Current assignee: TENERET Ltd
Priority date: 1987-10-06
Filing date: 1988-10-06
Publication date: 1989-06-14
Also published as: IE872663L; GB8823513D0

Abstract

A security closure for an existing exit door 3 or the like, comprises a security door 1 mounted by a hinge 7 adjacent on opening 2 closed by the exit door 3. A pair of spaced-apart rods 10 extend between the exit door 3 and security door 1 to operably connect the security door 1 to the exit door 3 so that as the exit door 3 is closed the security door 1 travels with it to securely close the opening 2. Each rod 10 has an inner end 11 bolted to the exit door 3 and is slidably engagable with the security door 1 at its opposite outer end 12. Preferably a roller 13 is mounted at the outer end 12 of the rod 10 for slidable engagement with an inner face 17 of the security door and a bar 14 mounted to the security door 1 for opening and closing respectively the security door 1 as the exit door 3 is opened and closed. <IMAGE>

Description

A SECURITY CLOE The invention relates to a closure, and in particular, to a security closure.

In general, public buildings, factories and the like are required to have emergency exits. One problem with emergency exits is that they provide a relatively easy access to the building for unauthorized intruders.

One solution to this problem is to reinforce the existing exit door, however in many cases this is not possible or is unsatisfactory as the hinges of the exit door or the door frame will not support the extra weight of the necessary reinforcement. Further, even if the exit door is reinforced the hinges or door frame may still be open to attack and are therefore a weak point which may be exploited by intruders.

There is therefore a need for a security closure to overcome this problem.

The present invention is directed towards providing such a security closure.

According to the invention, there is provided a security closure for a closure member such as an existing door, window or the like, the security closure comprising a security door and connection means for connecting the security door to the closure member so that, as the closure member is closed, the security closure travels with the closure member to securely close the opening in which the closure member is mounted.

In another embodiment of the invention hinge means are provided for hingedly mounting the closure member adjacent the opening.

In another embodiment of the invention the connection means comprises at least one connecting member for mounting to on one of the existing door or security door and extending therefrom to engage the other of the existing door or security door.

In another embodiment of the invention the connecting member slidably engages either the security door or the existing door.

In another embodiment of the invention each connecting member is mounted on the existing door.

In another embodiment of the invention each connecting member is slidably engagable with track means mounted on the security door.

In another embodiment of the invention the connecting member is slidably engagable with an inner face of the door.

In another embodiment of the invention each connecting member comprises a rod extending between the existing door and the security door.

In another embodiment of the invention the rod is fixed at an inner end to the existing door and is slidably engagable with the security door at its opposite outer end.

In another embodiment of the invention the outer end of the rod is slidably engagable with the security door and/or the track means.

In another embodiment of the invention the rod has a roller mounted at its outer end which is slidably engagable with the security door and the track means.

In another embodiment of the invention the roller is slidably engagable with the inside face of the security door an opening of the security door and the roller is slidably engagable with the track means when closing the security door.

In another embodiment of the invention the roller is rotatably supported in a roller support bracket fixed at the outer end of the rod.

In another embodiment of the invention the roller support bracket is of U-shaped construction having a base portion attached to the outer end of the rod and substantially parallel outwardly directed arms having free outer ends between which the roller is rotatably supported on a bearing pin.

In another embodiment of the invention the roller projects outwardly of the free ends of the bracket arms.

In another embodiment of the invention the track means is a bar mounted to the inside face of the security door.

In another embodiment of the invention the bar is rotatably mounted to the security door.

In another embodiment of the invention the rod has a pair of spaced-apart rollers mounted at its outer end engagable with the track means which passes therebetween.

In another embodiment of the invention the rollers are rotatably supported in a roller support bracket fixed at the outer end of the rod.

In another embodiment of the invention the roller support bracket is of U-shaped construction having a base portion attached to the outer end of the rod and substantially parallel outwardly directed arms between which the rollers are rotatably supported.

In another embodiment of the invention outer ends of each roller slidably engage elongate slots in the bracket arms.

In another embodiment of the invention the bar is mounted by support brackets on the security door.

In another embodiment of the invention the bar is rotatably mounted in the support brackets.

In another embodiment of the invention the outer end of the rod is slidably engagable with a slot or slots in the track means.

In another embodiment of the invention the rod has a pin mounted at its outer end for engagement with the slot or slots.

In another embodiment of the invention the pin is rotably and slidably mounted in a bushing at the outer end of the rod, the pin projecting outwardly of the bushing to slidably engage the slot or slots in the track means.

In another embodiment of the invention the track means has a pair of spaced-apart slots and outer ends of the pin projects outwardly of each end of the bushing to engage the slots.

In another embodiment of the invention track means comprises a pair spaced-apart substantially parallel plates attached to the inside face of the security door each plate having a slot therein slidably engaged by one of the outer ends of the pin.

In another embodiment of the invention the security door comprises a sheet of material with an outer face and inner face with a side edge or edges of the door projecting outwardly of the inner face at the periphery of the sheet.

In another embodiment of the invention one or more of the side edges are formed integrally with the sheet.

In another embodiment of the invention the sheet is substantially rectangular in shape and the side edges comprise a top edge, bottom edge and lateral edges extending between the top and bottom edges.

In another embodiment of the invention the lateral edges extend outwardly of the sheet at an angle forming sloping side edges.

In another embodiment of the invention the lateral edges are formed integrally with the sheet.

In another embodiment of the invention a flange is attached at an inner end of each lateral edge, the flanges extending between the top and bottom edges and being substantially parallel with the inner face of the security door and directed towards each other.

In another embodiment of the invention the flanges are formed integrally with the lateral sides.

In another embodiment of the invention a number of reinforcing members extend between the side edges.

In another embodiment of the invention the reinforcing members extend between the top and bottom edges of the security door.

In another embodiment of the invention a pair of spacedapart substantially parallel reinforcing members are provided In another embodiment of the invention each reinforcing member is generally Z-shaped in section having an central portion and inner and outer legs projecting outwardly therefrom and substantially perpendicular to the central portion, the central portion being secured to the flange on a lateral edge with its inner leg inwardly of the lateral edge and abutting the inner face of the security door and substantially perpendicular thereto and its outer leg adjacent the lateral edge projecting away from the inner face of the security door.

In another embodiment of the invention each reinforcing member is bolted to the flange.

In another embodiment of the invention the hinge means comprises a hinge fixed to the central portion of one of the reinforcing members and shrouded by the outer leg of the reinforcing member.

In another embodiment of the invention the hinge extends between the top and bottom edges of the security door.

In another embodiment of the invention the side edges extend substantially perpendicularly outwardly of the sheet.

In another embodiment of the invention the side edges are formed integrally with the sheet.

In another embodiment of the invention a pair of spacedapart substantially parallel reinforcing members are provided.

In another embodiment of the invention each reinforcing member has a generally U-shaped cross-section comprising a base portion with two outwardly projecting arms with flanged ends which are secured to the inner face of the security door.

In another embodiment of the invention the track means is mounted to the reinforcing members.

In another embodiment of the invention the track means is a bar having outer ends which are engagable with slots in the inner leg of the reinforcing member.

In another embodiment of the invention the track means is a bar supported by mounting brackets on the reinforcing members.

In another embodiment of the invention the track means is a pair of parallel plates mounted between the reinforcing members In another embodiment of the invention one or more side edges of the security door extend to engage one or more sides of the opening.

In another embodiment of the invention the top edge and one lateral edge of the security door engage corresponding sides of the opening.

In another embodiment of the invention the side edges of the security door engage slots in the sides of the opening.

In another embodiment of the invention there is further provided a bracket or brackets for mounting along a side or sides of the opening, each bracket having an outwardly projecting flange overlapped by a side edge of the security door when the security door is closed.

In another embodiment of the invention a side edge of the security door adjacent the hinge member extends over the hinge member to protect the hinge member.

The invention will be more clearly understood from the following description of some embodiments thereof, given by way of example only, with reference to the accompanying drawings, in which; Fig. 1 is a rear perspective view of a security closure according to the invention, Fig. 2 is a front perspective view of the security closure of Fig. 7 in use, Fig. 3 is a sectional side view of the security closure of Fig. 1 in use, Fig. 4 is a sectional plan view of the security closure of Fig. 1 in use, showing in broken outline the closure in an open position, Fig. 5 is a sectional plan view of the security closure of Fig. 1, Fig. 6 is a rear perspective view of a security closure according to another embodiment of the invention, Fig. 7 is a detail view illustrating portion of connecting member of the closure of Fig. 6, Fig. 8 is a sectional side view of the security closure of Fig. 6 in use, Fig. 9 is a sectional plan view of the closure of Fig. 6 in use, Fig. 10 is a rear perspective view of a security closure according to another embodiment of the invention, and Fig. 11 is a detail view illustrating portion of a connecting member of the closure of Fig. 10.

Referring to the drawings, and initially to Figs. 1 to 5 thereof, there is illustrated a security closure according to the invention, in this case a security door indicated generally by the reference numeral 1 for closing an opening 2 and protecting an emergency exit door 3 closing the opening 2. Briefly, the existing emergency door 3 is hingedly mounted on a frame 4 in the opening 2. The emergency door 3 is of timber and is retained closed by a conventional panic bolt assembly 5 engagable with the frame 4 (see Fig. 3).

The security door 1 is mounted by a hinge 7 to masonry 8 adjacent the opening 2 and is operably connected to the emergency door 3 by connection means so that the security door 3 and the emergency door open and close together. In this case the connection means comprises a pair of spaced apart rods 10 each having an inner end 11 fixed to the emergency door 3 and an outer end 12 with a roller 13 which is slidably engagable with the security door 1 and with a track means comprising a horizontal bar 14 mounted on the security door 1. As can be seen in Fig. 2 the security door 1 extends over the opening 2 and beyond it over masonry 8 surrounding the opening 2.

The security door 1 is fabricated from heavy mild steel plate and comprises a rectangular sheet 15 having an outer face 16 inner face 17, lateral side edges 18, a top 19 and a bottom 20 projecting outwardly of the inner face at the periphery of the sheet 14. Each side edge 18 slopes rearwardly at an angle to the outer face 16 and at an inner end 21 of the side edges 18 is an inwardly projecting flange 22 which is substantially parallel to the inner face 17. In this case the outer sheet 15, side edges 18 and flanges 22 are all formed from a single sheet of material. A reinforcing member 25 is attached by bolts to each flange 22 and extends between the top 19 and bottom 20. Each reinforcing member 25 is generally Z-shaped in section having a central portion 26 with an inner leg 27 and outer leg 28 projecting outwardly therefrom and substantially perpendicular to the central portion 26. On each reinforcing member 25 the central portion 26 overlaps and is secured to the flange 22 at one of the side edges 18 having its inner leg 27 mounted inwardly of the side edge 18 and extending to abut the inner face 17 of the security door 1. An outer leg 28 of each reinforcing member adjacent the inner end 21 of the side edge 18 projects rearwardly away from the inner face 17 of the security door 1. Each inner leg 27 of the reinforcing members 25 has a number of spaced-apart elongate slots 30 at each end adjacent the top 19 and bottom 20 of the security door 1. These slots 30 serve fcr mounting the bar 14 between the reinforcing members 25, outer ends 31 of the bar 14 releasably engaging the slots 30 and the bars 14 being secured in place by washers and split pins 33.The hinge 7 extends between the top 19 and bottom 20 of the security door 1 and is secured to the central portion 26 of a reinforcing member 25 at one side of the door by bolts and also mounted to the masonry 8 at one side of the opening 2 by hinge mounting bolts 35. At the other side of the opening 2 a bracket 36 having an outwardly projecting flange 37 is mounted and extends between the top 19 and the bottom 20 of the security door 1 inside the outer leg 28 of the reinforcing member when the security door 1 is closed. It will be noted that the outer legs 28 of the reinforcing members 25 extend inwardly towards the masonry 8 overlapping and protecting the hinge 7 at one side of the opening 2 and over-lapping the bracket 36 fixed to the masonry 8 at the5 other side of the opening 2.The top 19 and bottom 20 of the security door 1 comprise plates fixed to the security door and extending rearwardly from the outer face 16 back over the reinforcing members 25.

Each rod 10 of the connection means comprises a portion of stud bar rigidly secured at its inner end 11 by nuts 45 to the emergency door 3 as shown in Fig. 5. At the outer end 12 of each rod 10 is a U-shaped bracket 50 having a base portion 51 fixed to the rod 10 and two spaced apart substantially parallel arms 52 projecting outwardly therefrom and supporting therebetween the roller 13 by a pin 54. It will be noted that the roller 13 projects outwardly of the bracket 50 to engage the inner face 17 of the security door 1. The bar 14 passes rearwardly of the roller 13 between the arms 52 of the bracket 50.

In use, the security door 1 is mounted to the masonry 8 around the opening 2 of the emergency exit outside the existing emergency door 3. The bracket 36 running adjacent the outer leg 28 of the reinforcing member protects against the insertion of a lever between the security door 1 and masonry 8 to prise open the security door 1 and emergency door 3. On opening the emergency door 3 the security door 1 is simultaneously opened through the action of the rods 10 and rollers 13 on the security door 1. As the emergency door 3 - and security door 1 open, the rollers 13 bear against and slide along the inner face 17 of the security door 1 as can be seen in Figs. 4 and 5. Illustration of the relative positions of the security door 1 and the emergency door 3 in an open position is shown in Fig. 4.On closing the emergency door 3 the rods 10 pull the rollers 13 against the bars 14 to simultaneously close the security door 1, the rollers sliding along the bars14 away from the hinge 7 as the security door 1 closes.

It will be appreciated that when the security door 1 is in the closed position it completely covers the opening 2 and prevents access to the emergency door 3 while at the same time not restricting use of the emergency door 3. The security door 1 can only be opened by opening the emergency door from the inside in a conventional manner. Further, the hinge 7 is protected against attack by the outer leg 28 of the reinforcing member.

Referring now to Figs. 6 to 9 there is illustrated a security closure according to another embodiment the invention, in this case a security door indicated generally by the reference numeral 60 in which parts similar to those of the security door described with reference to Figs 1 to 5 and are assigned the same reference numerals. In this case the security door 60 is formed from a single sheet of metal having its peripheral edges bent inwardly perpendicular to an inner face 61 thereof to form a top edge 62, bottom edge 63 and side edges 64. Intermediate the side edges 6 and extending between the top edge 62 and bottom edge 63 are a pair of spaced-apart substantially parallel reinforcing members 65.Each reinforcing member 65 has a generally Ushaped cross-section comprising a bas portion 66 with two outwardly projecting arms 67 with flanged ends 68 which are secured to the inner face 61 of the security door 60. Track means comprising a bar 69 is rotatably supported adjacent each end by brackets 70 mounted to the reinforcing members65.

A rod 71 rigidly attached at an inner end 72 to the emergency door 3 extends to engage the bar 69. At an outer end 73 of the rod 71 is a U-shaped bracket 74 having a base portion 75 and a pair of outwardly projecting arms 76 rotatably supporting a pair of spaced-apart rollers 77 which are engagable with the bar 69 which passes therebetween. Outer ends of each roller 77 are slidably and rotably engagable with elongate slots 78 in the bracket arms 76. There is sufficient play between the rollers 77 and the bracket 74 to prevent jamming as the security door 60 is opened and closed.

Referring now specifically to Figs. 8 and 9 it will be noted -that the top edge 62 and one of the side edges 64 extends outwardly to engage slots 79 cut in the masonry 8. Although this is not essential it is preferable as it will prevent the insertion of a lever which might be used in an attempt to prise open the security door 60. The security door 60 operates in similar fashion to the security door described previously with reference to Figs. 1 to 5 however in this case the rollers 77 only engage the bar 14 and not the inner face 61 of security door 60.

Referring now to Figs. 10 and 11 there is illustrated a security closure according to another embodiment of the invention, in this case a security door indicated generally by the reference numeral 80 in which many parts are similar to those of the security door described with reference to Figs. 6 ta 9 and are assigned the same reference numerals.

In this embodiment connection means between the security door 80 and emergency door 3 comprises a pair of rods 81 with an inner end rigidly mounted to the emergency door 3. Each rod has a bushing 82 mounted at its free end 83. Each bushing 82 houses a pin 83 which is slidably and rotatably mounted therein, outer ends of the pin 83 projecting beyond both ends of the bushing 82 to slidably engage a track means comprising by a pair of spaced-apart plates 85 mounted in substantially parallel alignment between the reinforcing members 65. Both plates 85 have slots 86 therein extending between reinforcing members 65 for reception of the pin 83.

A washer 87 and split-pin 88 fitted at each end of the pin 83 retains the pin 83 within the slots 86 and bushing 82.

Operation of the security door 80 is substantially similar to the security doors previously described with reference to Figs. 1 to 9, however, in this case the pin 83 slides along the slots 86 of the plates 85 to simultaneously open and close the security door 80 and emergency door 3.

It will be appreciated that while the security door has been described as being of steel plate, it could be of any other suitable material. In fact, it could be sheet metal in certain cases, or alternatively it could be of timber covered in metal plate or sheet metal.

Further, it will be appreciated that while particular connection means have been described for connecting the emergency door to the security door, any other suitable connection means could be used.

It is envisaged that the connecting members may be mounted on the security door and the track means on the emergency door.

Additionally, it will be appreciated that while the closure member has been described for use with an emergency exit, it could be used for any other openings closed for example by windows, other doors, gates or the like.

The invention is not limited to the embodiments hereinbefore described, and may be varied in construction and detail.

Claims

pAINS

1. A security closure for a closure member such as an existing door, window or the like, the security closure comprising a security door and connection means for connecting the security door to the closure member so that, as the closure member is closed, the security closure travels with the closure member to securely close the opening in which the closure member is mounted.

2. A security closure according to claim 1 wherein hinge means are provided for hingedly mounting the security door adjacent the opening.

3. A closure as claimed in claim 1 or 2 wherein the connection means comprises at least one connecting member for mounting to one of the existing door or security door and extending therefrom to engage the other of the existing door or security door.

4. A closure as claimed in claim 3 wherein the connecting member slidably engages either the security door or the existing door.

5. A closure as claimed in claim 3 or 4 wherein the or each connecting member is mounted to the existing door.

6. A closure as claimed in claim 5 wherein each connecting member is slidably engagable with track means mounted on the security door.

7. A closure as claimed in claim 6 wherein the connecting member is slidably engagable with an inner face of the door.

8. A closure as claimed in any of claims 3 to 7 wherein the or each connecting member comprises a rod extending between the existing door and the security door.

9. A closure as claimed in claim 8 wherein the rod is fixed at an inner end to the existing door and is slidably engagable with the security door at its opposite outer end.

10. A closure as claimed in claim 10 wherein the outer end of the rod is slidably engagable with the security door and/or the track means.

11. A closure as claimed in claim 10 wherein the rod has a roller mounted at its outer end which is slidably engagable with the security door and the track means.

12. A closure as claimed in claim 11 wherein the roller is slidably engagable with the inside face of the security door on opening of the security door and the roller is slidably engagable with the track means when closing the security door.

13. A closure as claimed in claim 12 wherein the roller is rotatably supported in a roller support bracket fixed at the outer end of the rod.

14. A closure as claimed in claim 13 wherein the roller support bracket is of U-shaped construction having a base portion attached to the outer end of the rod and substantially parallel outwardly directed arms having free outer ends between which the roller is rotatably supported on a bearing pin.

15. A closure as claimed in claim 14 wherein the roller projects outwardly of the free ends of the bracket arms.

16. A closure as claimed in any of claims 11 to 1 wherein the track means is a bar mounted to the inside face of the security door.

17. A closure as claimed in claim 16 wherein the bar is rotatably mounted to the security door.

18. A closure as claimed in claim 10 wherein the rod has a pair of spaced-apart rollers mounted at its outer end engagable with the track means which passes therebetween.

19. A closure as claimed in claim 18 wherein the rollers are rotatably supported in a roller support bracket fixed at the outer end of the rod.

20. A closure as claimed in claim 19 wherein the roller support bracket is of U-shaped construction having a base portion attached to the outer end of the rod and substantially parallel outwardly directed arms between which the rollers are rotatably supported.

21. A closure as claimed in claim 20 wherein outer ends of each roller slidably engage elongate slots in the bracket arms.

22. A closure as claimed in any of claims 18 to 21 wherein the track means is a bar mounted to the inside face of the security door.

23. A closure as claimed in claim 22 wherein the bar is mounted by support brackets on the security door.

24. A closure as claimed in claim 23 wherein the bar is rotatably mounted in the support brackets.

25. A closure as claimed in claim 10 wherein the outer end of the rod is slidably engagable with a slot or slots in the track means.

26. A closure member as claimed in claim 25 wherein the rod has a pin mounted at its outer end for engagement with the slot or slots.

27. A closure as claimed in claim 26 wherein the pin is rotably and slidably mounted in a bushing at the outer end of the rod, the pin projecting outwardly of the bushing to slidably engage the slot or slots in the track means.

28. A closure as claimed in claim 27 wherein the track means has a pair of spaced-apart slots and outer ends of the pin project outwardly of each end of the bushing to engage the slots.

29. A closure as claimed in claim 28 wherein the track means comprises a pair spaced-apart substantially parallel plates attached to the inside face of the security door each plate having a slot therein slidably engaged by one of the outer ends of the pin.

30. A closure as claimed in any preceding claim wherein the security door comprises a sheet of material with an outer face and an inner face with a side edge or edges of the door projecting outwardly of the inner face at the periphery of the sheet.

31. A closure as claimed in claim 30 wherein one or more of the side edges are formed integrally with the sheet.

32. A closure as claimed in claim 30 or 31 wherein the sheet is substantially rectangular in shape and the side edges comprise a top edge, a bottom edge and lateral edges extending between the top and bottom edges.

33. A closure as claimed in claim 32 wherein the lateral edges extend outwardly of the sheet at an angle forming sloping side edges.

34. A closure as claimed in claim 32 or 33 wherein the lateral edges are formed integrally with the sheet.

35. A closure as claimed in any of claims 32 to 34 wherein a flange is attached at an inner end of each lateral edge, the flanges extending between the top and bottom edges and being substantially parallel with the inner face of the security door and directed towards each other.

36. A closure as claimed in claim 35 wherein the flanges are formed integrally with the lateral sides.

37. A closure as claimed in any of claims 30 to 36 wherein a number of reinforcing members extend between the side edges.

38. A closure as claimed in claim 37 wherein the reinforcing members extend between the top and bottom edges of the security door.

39. A closure as claimed in claim 37 or 38 wherein a pair of spaced-apart substantially parallel reinforcing members are provided.

40. A closure as claimed in claim 39 wherein each reinforcing member is generally Z-shaped in section having an central portion and inner and outer legs projecting outwardly therefrom and substantially perpendicular to the central portion, the central portion being secured to the flange on a lateral edge with its inner leg inwardly of the lateral edge and abutting the inner face of the security door and substantially perpendicular thereto and its outer leg adjacent the lateral edge projecting away from the inner face of the security door.

41. A closure as claimed in claim 40 wherein each reinforcing member is bolted to the flange.

42. A closure as claimed in claim 40 or 41 wherein the hinge means comprises a hinge fixed to the central portion of one of the reinforcing members and shrouded by the outer leg of the reinforcing member.

43. A closure as claimed in claim 42 wherein the hinge extends between the top and bottom edges of the security door.

44. A closure as claimed in claim 32 wherein the side edges extend substantially perpendicularly outwardly of the sheet.

45. A closure as claimed in claim 44 wherein all the side edges are formed integrally with the sheet.

46. A closure as claimed in claim 45 wherein a number of reinforcing members extend between the side edges.

47. A closure as claimed in claim 46 wherein the reinforcing members extend between the top and bottom edges of the security door.

48. A closure as claimed in claim 47 wherein a pair of spaced-apart substantially parallel reinforcing members are provided.

49. A closure as claimed in claim 48 wherein each reinforcing member has a generally U-shaped cross-section comprising a base portion with two outwardly projecting arms with flanged ends which are secured to the inner face of the security door.

50. A closure as claimed in any of claims 37 to 43 and 46 to 49 wherein the track means is mounted to the reinforcing members.

51. A closure as claimed in claim 50 wherein the track means is a bar having outer ends which are engagable with slots in the reinforcing members.

52. A closure as claimed in claim 50 wherein the track means is a bar supported by mounting brackets on the reinforcing members.

53. A closure as claimed in claim 50 wherein the track means is a pair of parallel plates mounted between the reinforcing members.

54. A closure as claimed in any preceding claim wherein one or more side edges of the security door extend to engage one or more sides of the opening.

55. A closure as claimed in claim 54 wherein the top edge and one lateral edge of the security door engage corresponding sides of the opening.

56. A closure as claimed in claim 54 or 55 wherein the side edges of the security door engage slots in the sides of the opening.

57. A closure as claimed in any preceding claim wherein there is further provided a bracket or brackets for mounting along a side or sides of the opening, each bracket having an outwardly projecting flange overlapped by a side edge of the security door when the security door is closed.

58. A closure as claimed in any preceding claim wherein a side edge of the security door adjacent the hinge member extends over the hinge member to protect the hinge member.

59. A closure substantially as hereinbefore described with reference to and as illustrated in Figs. 1 to 5 of the drawings.

60. A closure substantially as hereinbefore described with reference to and as illustrated in Figs. 6 to 9 of the drawings.

61. A closure substantially as hereinbefore described and as illustrated in Figs. 10 and 11 of the drawings.