GB2523429A

GB2523429A - Door stop

Info

Publication number: GB2523429A
Application number: GB1417709.1A
Authority: GB
Inventors: Jerry Smith
Original assignee: PRIMERA LIFE Ltd
Current assignee: PRIMERA LIFE Ltd
Priority date: 2013-10-07
Filing date: 2014-10-07
Publication date: 2015-08-26
Also published as: GB201417709D0; GB201317704D0

Abstract

An elongate stop member 1 is fixed in a first position to a door frame 2 and in a second position to a complementary door 4, to allow the door to be opened in the reverse to normal direction in an emergency. Releasable fixing elements 6, hooked lugs (14, fig 3), preferably extend from the rear of the stop to engage a retainer 16 on the door frame, the retainer may be a plate 18 with apertures 20. Second retaining means preferably comprise retaining plates (50, fig 6) on the door which cooperates with hooked buttons (34, 36, fig 3) projecting from the stop. The plate preferably comprises an opening and slot housing a sliding retention plate. A lever 26, located in a recess on the front of the stop, preferably locks the stop in either first or second positions.

Description

DOOR STOP

This invention relates to a door stop arranged to be fitted to a door frame and a door.

The door stop is particularly suited for use in mental heafth care.

It is known to provide a door frame to which a door is attached. The door frame is typically attached to an opening in a wall of a building. In most situations it is desirable that a door opens in a first direction only. A part of the door frame can be arranged to prevent the door from opening in a second direction and as such is known as a door stop or can be known as a rebate. A single action door is typically provided with a single action hinge arranged to swing tile door in the first direction.

It is desirable in at east some situations to provide a door that is arranged to open in a first direction, typically into a room such as a bedroom but that can be opened in a second direction in case of an emergency. Such a door is typically mounted on a double action hinge allowing the door to swing in the first and the second direction.

The door is arranged to operate in a single action in norm& circumstances. The door can be configured to operate in a single action by the provision of a doorstop that can bc removcd in the case of an cmergcncy.

It is a known probkm in mental health care that a room occupant may try to barricade themselves inside a room to prevent clinical staff from entering. It will be appreciated that this is a serious safety issue given the potential for self-harm in such environments. In meta' health care it is common to provide a door to a client's bedroom which is describcd as being anti-barricade. Such doors are gencrally equipped with a locking mechanism provided with safety features to enable clinical staff to unlock the door in the case of an emergency. The client may attempt to prevent entry of the clinical staff to the room by leaning against the door and preventing the door from swinging into the client's room, It has been known to overcome this problem by providing a removable door stop secured to the door frame. In the case of an emergency the removable door stop may be unlocked and removed from the door frame. It has been known to provide such door-stops in the past. One earher door stop is that provided by Tntastop Limited under the trademark Doublc Swing Hinge Package" (referred to as RDS) details of which can be found at the URL httpiiww w.intastop.com/product!doubdle-swing hnge-package, Such a doorstop has, in many cases, to be manufactured in advance to a bespoke size. In addition this removable door stop pivots out of its normal operating position and the stops are handed left or right depending upon the side of S the door on which the stop is to be located. The removable door stop pivots out of the stop position and remains attached to the frame.

An alternative removable door stop is described in an earlier UK patcnt application number GB 01210889.0. Tn this apphcation there is described a removable door stop which enables the door stop to be quickly unlocked and removed in the case of an emergency.

According to a first aspect of the invention there is provided an anti-barricade system adapted to be fitted to a door in a door frame, the system comprising an elongate stop member having a first releasable fixing element, adapted to secure the elongate stop member to the door frame, and a second releasable fixing element arranged to be able to secure the door-stop to the door, the door stop further comprising a locking member arranged to be operable to move the elongate member from a first position in which the first fixing element secures the elongate stop member to the door frame, to a second position in which the second fixing element secures the elongate stop member to the door.

According to an aspect of the invention there is provided an anti-barricade system adapted to be fitted to a door in a door frame, the door having a first side face, a second side face and a first edge and wherein the door is openable about a first pivot axis, the system comprising an elongate stop member having a first releasable fixing element, adapted to secure the elongate stop member to the door frame, and a second releasable fixing element arranged to be able to secure the door elongate stop member to the door, the elongate door stop member further comprising a locking member arranged to be operable to move the elongate stop member from a first position in which the first fixing element secures the elongate stop member to the door frame to a second position in which the second fixing element secures the elongate stop member to a first side of the door.

It had been found that the earlier door stop is not secured to the door frame or to the door when it is unlocked, Although a parking element was described and used there had been found that there is an element of risk in an emergency situation as the client could grab the door stop and use the door stop as a makeshift weapon.

The present invention overcomes this disadvantage as the door stop is preferably secured at all times either to the door frame or to the door in a barricade scenario.

Preferably the door stop is an elongate stop member comprising a front face and a rear face and the rear face is arranged to be placed against a surface of the door frame.

Preferably the first releasable fixing element extends from the rear facc of the door stop. Cooperating first retaining means are preferably provided on the door frame.

Preferably the first releasable fixing element comprises a number of lugs arranged to coopcratc with a complementary retaining clement on or fixed to thc door frame. In some preferred embodiments the complementary first retaining element comprises a plate which may be provided with a number of receiving apertures. Preferably the first fixing element on the door stop comprises a number of lugs connected to a linking member. Desirably the linking member is connected to the locking member and is arrangcd to be moveabic by thc locking member such that each of the lugs are arranged to move together. The lugs may be arranged to project from rear face of the door stop and to have hook portions at a distal end of the lugs. The hook portions are preferably arranged to engage with the first retaining element. In some embodiments the first retaining element comprises apertures arranged to receive and engage lugs.

The hook portions can be received in the aperture and may be arranged to engage with a face of the aperture or may be arranged to engage with a retaining member located in the aperture.

Preferably the first retaining element is secured to the door frame, The first retaining element is preferably provided in the form of an elongate frame plate that is desirably full length, Preferably the first retaining means comprises a number of apertures provided in the elongate plate. The frame plate may be secured to the door frame by means of a number of suitably located screws. The apertures are preferably spaced along a length of the frame plate, Preferably the system further comprises a retaining means securable to the door frame and wherein the retaining means may comprise an elongate plate having cooperating means arranged to cooperate with the first releasable fixing element.

S Preferably the locking member comprises a lever located on a front face of the door stop. Preferably the lever is concealed and secured and lockable in the course of normal use. The lever may be located in a recess in the front face of the door stop. In a first position the lever is located within the recess. A lock may be provided so that the lever cannot be accessed in the normal course of use of the door stop. In the case of an emergency a key may be provided to release the lever, The key may be one of a number of conventional key. Once the lock has been released the lever can be moved from a first recessed position in which the first fixing element is in a first position in which the tugs are arranged to engage with the retaining element. The kver can be moved to a second extended position in which the first fixing element is in a second position in which the lugs are arranged to be able to disengage from the retaining element.

Prcferably as the lever is moved to the second extended position the second releasable fixing element is arranged to be moved into a position in which the door stop can be secured to the door located in the door frame. In one embodiment the second fixing means comprises a number of projecting buttons located on the door stop and in a preferred embodiment comprises a first and a second projecting button located on an upper section and a lower section respectively of the door stop. In a preferred embodiment a second retaining means is provided on the door and the second retaining means is arranged to cooperate with the second fixing element, The second retaining means may comprise a number of retainers, Preferably the system comprises a second fixing element. The second fixing element may comprise a first and a second fixing means provided on the elongate stop member, Each of the first and second fixing means may be in the form of a button projecting from a side face of the door stop. It may be desirable to provide a second respective retaining means comprising components arranged to receive the second fixing element, The second respective retaining means may comprise a retainer arranged to be fitted to the door and being arranged to receive and retain the second fixing element when the elongate stop member is in the second position, In a preferred embodiment the second respective retaining means comprises two retainers arranged to be fitted to the door and having means adapted to receive and retain the second fixing element when the elongate stop member is in the second position.

Tn a preferred embodiment the second retaining means comprises a first retention p'ate and a second retention plate. The first retention plate may bc located at an upper edge of the door-stop and the second retention plate may be located at a lower edge of the door-stop. Preferably each retention plate comprises a box section arranged to be fitted to the door. The retention plate comprises an opening and a s'ot. It is desirabk that the slot in the retention plate is angled. The first projecting button is preferably arranged to be engageable with the opening in the retention plate when the door stop is in the first position and secured to the door frame. It is desirable that the button is arranged to enter the s'ot in the first retention plate as the locking member is moved from the first position to the second position. Preferably the elongate stop member moves down and away from the door frame and the projecting buttons is are arranged to move down into the slot of the retention plate. The slot in the retention plate is adapted to receive the button and to aflow the downward movement, Preferably the slot has a section that is angled away from the door stop and the projecting button is arranged to enter the angled portion and to move away from the door frame together with the whole of the elongate stop member. The second projecting button is arranged to be engageable with the corresponding opening and slot in the second retention plate in the same way has been described in relation to the first retcntion plate.

Preferably as the locking member moves from the first recessed position to the second raised position the door stop is moved longitudinally relative to the door and the first and second projecting buttons are moved to be located in the slots in the first and second retention plates. In use, the elongate stop member is moved downwardly relative to the door. Preferably each of the buttons is arranged to project laterally from the door stop and is provided with an angkd hook portion that engages within the respective retention plates as the first and second buttons engage within the respective slots, It vil be appreciated that the arrangement of the second fixing element can be reversed such that for example for the second fixing element the fixing means is provided on the door and the second retaining means are provided on the elongate stop mciii be r In a more preferred embodiment the second fixing element comprises a number of S buttons fixed to the door and a second retaining means provided on the dongate stop member such that the elongate stop member can be secured to the door when the locking member is in the second position. Preferably the or each button is generally mushroom shaped with a head and a stem and desirably there is a clearance between a back portion of the head and the surface of the door to which the button is mounted.

The clearance may be controlled by a length of the stem.

Preferably two or more buttons are provided on the door. It is desirable that each button is designed to be anti-ligature. The second retaining means may be provided on the elongate stop member in the form of co-operating retention plates preferably located on a side face of the elongate stop member.

As before the or each retention p'ate may comprise a box section or may comprise a plate. Preferably the retention plate comprises an opening and a slot, The slot in the retention plate may be angled. in a preferred embodiment the slot is vertically orientated and the retention plate may be a slide section arranged to slide within channels in the elongate stop member, Desirably a ocking stop is provided that is arranged to lock the slide in a second, extended position.

Preferably the first projecting button is arranged to be engageabk with the opening in the retention plate when the door stop is in the first position and secured to the door frame, The opening may be dimensioned such that a head of the button can enter the opening freely.

It is desirable that the head of the button is arranged to enter the slot in the first retention plate as the ocking member is moved from the first position to the second position, Preferably the elongate stop member moves down and away from the door frame and the projecting buttons is are arranged to move into the slot of the retention plate securing the elongate stop member to the door, The s'ot in the retention plate is adapted to receive the button and to aflow the downward movement of the dongate stop member, The second or further projecting button is arranged to be engageable with the corresponding opening and slot in a retention plate in the same way has been described in relation to the first retention plate.

According to a second aspect of the invention there is provided a removable door stop for an anti barricade system in accordance with the first aspect of the invention wherein the door stop is suitable for fixing to a door frame in which a door is fitted, the door stop comprising an elongate stop member adapted to be releasablv secured to the door frame by means of a first releasable fixing element and having a second releasable fixing element adapted to be securable to a first side of the door in the door frame in use and wherein the elongate stop member has a locking member that is operable to move from a first position, in which in use the first fixing element is engaged with the door frame, to a second position in which in use the first fixing element is released from the door frame and the elongate stop member is secured by the second fixing element to the door.

According to a third aspect of the invention there is provided a kit of parts comprising at least one of: a door stop in accordance with the second aspect of the invention; a first retaining element adapted to be securable to a door frame, one or more fixing means arranged to be fixable to a door, and a second retaining element adapted to be secured to a door.

It will be appreciated that a kit may be provided to allow a door to be converted to an anti-barricade door and the kit may comprise each of the components comprising the door stop, the first retaining element fixable to the door frame and the second retaining element fixable to the door, Alternatively the kit may comprise the door stop together with a first retaining element and one or more fixing means, The fixing means preferably comprise anti-ligature buttons, The second retaining element preferably comprises a first and a second retaining plate. In some eases it may be desirable to fix a new door within an existing frame and it may be desirable to provide a set of second retaining elements to be fixed to the door.

According to a fourth aspect of the invention there is provided a method of providing an anti-barricade door in a door frame comprising: providing a removable door stop in the form of an elongate stop member having a first releasable fixing element and a second releasable fixing element and a S locking member; fixing the removable door stop to the door frame by means of the first releasable fixing element; arranging thc sccond rcleasablc fixing clcment to bc sccurablc to a first sidc of the door such that operating the locking member to move the elongate stop member from a first position to a second position releases the elongate stop member from the door frame and in the second position the elongate stop member is secured to the first side of the door.

Preferably once the door stop has been fitted to the door frame the door buts against a side face of the door stop and the door-stop acts in the same way as a conventional door-stop or rebate aflowing the door to be closed and the client's privacy to be maintained.

Preferably the locking member is accessed and operated to move the first retaining means to a second position in which the door stop is released from the door frame and is moveable relative to the door frame. The door stop can then move so that the second fixing means which may comprise projecting buttons engage with the door and secure the door stop to the door. It is desirable that the door is provided with retention plates as described and that the projecting buttons engage with the slots in the retention plates. Preferably the projecting buttons are provided with hook portions that pass through the slot in the retention plates and retain the door stop on the door.

Alternatively as the locking member is operated the door stop is released from the door frame and is moveabk relative to the door frame and the door. The elongate stop member can move such that the projecting buttons on the door enter the slots in the respective retention plates in the elongate stop member. The head of the button is held behind the retention plate and the reduced diameter stem is able to move within the slot. The elongate stop member transfers from being secured to the door frame to being secured to the door, Preferab'y the retention plate is angled and slideabk within channels in the elongate stop member, It is desirable that a stop means be provided to prevent the retention plate from sliding out of the opening. In a preferred embodiment a locking mechanism is provided that locks the elongate stop member in position secured to the door.

S It will be appreciated that in the case of an emergency situation the door can be opened from the outside of the room even if the client is leaning against an inside of the door. A staff member can open the door by utilising a key to access the concealed lever. The lever is moved from the first position to the second position so disengaging the first fixing element from the first retaining means and aflowing the door stop to move downwardly and away from the door frame. As the elongate stop member moves downwardly and away from the door frame the projecting buttons are moved from the opening in the retention plates and into the respective slots. The hook portion is retained inside the retention plates and secures the door stop to the door.

Once the door stop is secured to the door the door can be opened in a reverse direction away from the room and away from a client attempting to barricade the door.

It will be appreciated that the door stop is secured to the door frame or to the door at all times and therefore the door stop cannot be used as a weapon by a client against the clinical staff The invention wifl now be further described by way of example on'y with reference to the accompanying drawings iii which: Figure I is a perspective view of the door stop system fixed to a door frame; Figure 2 is a front perspective view of the door stop; Figure 3 is a rear view of the door stop; Figure 3a is a side view of the door stop of Figure 3; Figure 4 is a side view of an upper detail of the door stop; FigureS is a side view of a tower portion of the door stop; Figure 6 is a perspective view of a lower end cap; Figure 7 is a perspective view of an upper end cap; S Figure 8 is a p'an view of a door in a door frame with the door stop secured to the door; Figure 9 is a perspective view of a section of an alternative embodiment of an elongate stop member; Figure lOa is a side view of a retainer in the embodiment of Figure 9 in a first position; Figure lOb is a view of the retainer of iDa from within the elongate stop member; Figure ii a is side a view of the retainer of I Oh in a second position; Figure llb is a view of the retainer of lOb from within tile elongate stop member, and Figure t2a to 12d are rear, front, side and perspective views of a button Figure 1 illustrates a door stop 1 in the form of an eiongate stop member attached to a door frame 2 in which a door 4 is fixed. As best seen in Figures 2 and 3 the door stop I comprises a first fixing dement 6, which is arranged to be engageable with the door frame, and a second fixing element S arranged to be able to secure the door stop to the door.

The door stop comprises a front face 10 and a rear face 12. The first fixing element 6 extends from the rear face 12 of the door stop. The first fixing element comprises a series of lugs 14 attached to a connecting member within the door stop. Each of the lugs 14 project from the rear face of the door stop as is best seen in Figure 3a, In this embodiment a complementary retaining element 16 is provided in the form of a plate IS which has a number of apertures 20 which are each arranged to receive a respective lug 14 within the aperture. Each lug 14 comprises a hook portion IS which is arranged to extend with the aperture and engage with a back surface of the plate 15 when the door stop is locked in the first position. When the door stop is locked in the first position the door stop is securdy retained on the door frame and a side face 22 of the door stop is presented to a side 24 of the door.

S The connecting member comprises a rod arranged to extend from an upper edge of the door stop to a lower edge of the door stop. The lugs 14 are evenly spaced along the rod. The rod is also arranged to be connected to a lever 26 which is located in a recess 28 in the door stop. The lever is arranged within the recess 28 and is unobtrusive as the kver is within the recess and a face 30 of the lever is flush with the front face 10 of the door stop. The lever 26 is provided with a lock 32 which secures the lever and prevents unauthorised operation of the lever. In a first position the lever lies within the recess. Operation of the lever is substantially as described in application number 0121 0889,0 and operates in a conventional manner so will not be further described here.

As shown in more detail in Figures 4 and 5. the second rdeasable fixing means 8 comprises a first and a second button 34 and 36. Tn this embodiment the first and second buttons are located on first 38 and second 40 end caps which are arranged to connect to the door stop at an upper end 42 and a lower end 44, The first cap 38 is arranged to connect to the upper end 42 and comprises a substantially rectangular cap having faces that are arranged to be contiguous with the side and front faces of the door stop. In view of the intended use of the door stop in mental health care it is an important feature of the product that all the connections are formed such that a ligature cannot be located or forced into any of the joints.

The second cap 40 is arranged to be connected to a lower end 44 of the door stop and comprises a body 46 that is formed snch that an upper portion of the body is contiguous with the front and side faces of the door stop, The body 46 is angled towards a second face 48 so that an aestheticafly pleasing form is provided and the door stop occupies less space within the door frame at the base of the door stop. In addition the angled slope of the lower end cap is designed to limit the potential for an object to be jammed under the door stop when the door stop is fixed to the door frame in the first position and that would prevent the downward movement when the door stop is being removed or transferred to the door in an emergency. The second button is provided on a side face of the lower cap and projects towards the door, The first and second buttons 34. 36 are arranged to extend into a corresponding S receiving means 50 on the door. The receiving means 50 does not engage with the buttons when the door stop 1 is in thc first position so the door can open and close freely against the door stop.

Each of the first and second buttons 34, 36 comprises a stem 52 and an ang'ed hook portion 54. The stem 52 and the angled hook portion 54 are shaped so that each of the first and second buttons 34 and 36 are anti-ligature and there are no points around which a ligature can be secured.

The second retaining means will now be described in more detail with reference to Figurcs 6 and 7. Figure 6 shows a first retention plate 52 which is fixed to a side 4 of the door by screws (not shown). The first retention plate 52 is attached to an outer side 4 of the door and is mounted adjacent the base of the door, The retention p'ate 52 comprises a hollow section having a first side 54 arranged to be secured to the door.

A second side 56 of the retention plate is spaced away from the first side by front 58 and rear 60 spaced apart opposing webs. A lower web 62 closes a base of the retention plate and an upper web 64 partiafly closes an npper part of the retention plate. A cut out 66 is provided which extends across part of the upper web and a part of the front web 58. The cut out extends downwardly in the second side of the retention plate. A s'ot 68 extends downwardly from the cut out and a portion 70 of the slot is angled downwardly and away from the front of the retention plate The retention plate is arranged so that as the door closes on the door stop the respective button enters the cut away portion and does not engage with the retention plate A second retention plate 72, illustrated in Figure 7. is now described and is arranged to be fitted to the outer side of the door and is mounted adjacent an upper edge 74 of the door. The second retention plate is simfiar to the first retention p'ate and comprises a hoflow section having a first side 76 arranged to be secured to the face of the door. A second side 78 of the second retention plate is spaced away from the first side by the front and rear opposing webs 80, 82 and as before a lower web 84 is provided which closes off a tower portion of the retention plate and an upper web 86 closes off an upper portion of the retention plate. On the second retention plate the front web is not cut away but a section of the upper web is removed forming a cut-out S section 88, The cut out section is arranged such that the respective button can freely move into and out of the cut out in the retention plate.

The second retention plate is provided with a second aperture arranged to release a ligature inserted into the cut out section 88.

In a barricade scenario the door may be closed against the door stop by the client. It will be appreciated that forcing the door open will be difficult and may be dangerous.

The present invention enables the staff to open the door outwards and away from the client, The staff have access to a key which they can use to access the lever stowed in the door stop. Once the lever is accessible and operational the lever can be rotated outwardly from the recess. One end of the kver is connected to the linking member and as the lever is rotated the linking member is moved downwarWy, The downward movement of the linking member moves the lugs within the apertures in the retaining clement in a downward direction. Once the lever and the linking member arc in the second position the lugs and hook portions are free to move out of the apertures in the retaining element. The movement of the linking member is downward and outward from the door frame and the door stop as a whole can continue the outward and downward movement. As the door stop moves away from the door frame the buttons which are received within the cut-outs on the first and second retention plates are moved downwardly and enter the respective slots that are connected to the cut-outs.

Once the buttons are located in the slots the hook portions on the stems are within the retention plate and the slot is dimensioned so that the buttons are held in place. The continued downward movement of the door stop moves the buttons into the angled portions of the slots and continues to control the movement of the door stop downward and away from the door frame.

The door stop is firmly held in place on the door as can be seen on Figure 8 and the door can be rotated about the double action hinges 90 to rotate the door away from the client in the room, As the door moves away from the room the door stop I is secured to the door, It will be appreciated that the door stop is securely retained on the door and in addition the location of the door stop on the back of the door prevents the door stop form being seen by the client. It will be appreciated that the door can be safdy opened without risking the door stop being used as a weapon by an aggressive or distressed client.

An alternative embodiment will now be described in relation to Figures 9 to 12. In this embodiment the arrangement of the fixing element is reversed and the fixing means is provided on the door. The door stop is provided with second retaining means in the dongate stop member. A section of the door stop 100 is shown in Figure 9 with a second retaining means 102. The second retaining means 102 comprises a retention plate 104 and having an aperture 106 and a connecting slot 108, The retention plate 104 is arranged to slide in channels 110 in the elongate stop member 100. The channels are angled so that the retention plate can slide relative to the door stop as the locking means is operated to move the elongate stop member from the first position to the second position.

In Figure 9 a rear portion I 12 is shown of a button 114 secured in the retention plate 104. The button will be described in more detail below.

Figure lOa us a side view of the fixing element in the first position. The retention plate 104 can be seen to be fufly ocated within the dongate stop member 100. The button 114 can be seen to be located within in the aperture 106 in the retention plate.

When the retention plate 104 is in this position the button can move into and out of the aperture 106 without hindrance.

As can be seen in Figure lOb the retention plate is located fully within the opening 116 in the elongate stop member. Figure lOb illustrates the retention plate in position in the elongate stop member from within the elongate stop member.

Figure I Ia is a view of the retention p'ate in a second position in which the button can be seen to have moved from the aperture 106 to the slot 108, Downward and outward movement of the door stop from the door frame has moved the elongate stop member dosvnwardy r&ative to the retention plate. which is fixed relative to the door by the engagement of the button with the retention p'ate. The retention plate 104 has moved out of the opening 116, The retention plate has a locking slide 118 which as can be seen in Figure lIb engages with a stop 120 provided on the inside of the elongate stop member and prevents the retention plate from being pushed back in to the opening.

This arrangement helps to prevent the slide from being pnshed back and removed from the opening. As such this is a useful safety feature preventing the door stop from being removed from a door in a barricade scenario. Additionafly a locking mechanism is provided to lock the elongate stop member to the door. A spring latch mechanism can be incorporated in the elongate stop member so that the door stop cannot be lifted from the door. The locking mechanism may be operated by a concealed press button or may be operated by a lock, Chnical staff can hoM the key so that the door stop can be removed from the door and secured to the door frame once the barricade scenario is over, Figures 1 2a to 12 d iflustrate the button which forms the fixing means, Each button comprises a head 152 and a stem 154, The head 152 is generally round and is hollow having a throlLgh opening 156. The stem is generally longitudinal and is narrower in a first orientation 158 than the head. In a perpendicu'ar second orientation 160 the stem is wider than the head, The stem is arranged to be received in and to be moveable in the slot 108. The head 152 is dimensioned to be able to move freely into and out of the aperture, The stem is dimensioned such that the width in the first orientation is such that the stem can fit within the slot 108 and move within the slot. The head 152 however cannot pass throngh the s'ot and the button is retained in position within the retention plate. The button has a ramp 162 from the widest portion of the stem to the head and having a surface contiguous with a side surface 164 of the head, The provision of this ramp provides an antiligature feature to the button when it is mounted with the second orientation in a substantially vertical orientation.

It has been found to be advantageous to provide the elongate stop member with the retention plate. In this arrangement only the buttons have to be mounted on the door, so facilitating instaflation,

Claims

CLAIM SAn anti-barricade system adapted to be fitted to a door in a door frame, the S door having a first side face, a second side face and a first edge and wherein the door is openable about a first pivot axis, the system comprising an elongate stop member having a first releasable fixing element, adapted to secure the elongate stop member to the door frame, and a second releasable fixing element arranged to be able to secure the elongate stop member to the door, the elongate stop member further comprising a locking member arranged to be operable to move the elongate stop member from a first position in which the first fixing element secures the elongate stop member to the door frame to a second position in which the second fixing element secures the elongate stop member to a first side of the door.
2. An anti-barricade system according to claim 1 wherein the elongate stop member is positively secured to the door frame or to the first side of the door.
3, An anti-barricade system according to claim 1 or claim 2 wherein the elongate stop comprises a rear face and the first releasable fixing element extends from the rear face of the door stop.
4. An anti-barricade system according to any preceding claim wherein a cooperating first retaining means is provided on the door frame and comprises an elongate frame plate.
5, An anti-barricade system according to any preceding claim wherein the first fixing element on the elongate stop member comprises a number of lugs connected to a linking member.
6, An anti-barricade system according to any preceding claim wherein the locking member comprises a lever.
7. An anti-barricade system according to any preceding claim wherein the locking member is located in a recess in a front face of the elongate stop member.
8. An anti-barricade system in accordance with any preceding claim in which the lever is lockable to prevent movement of the elongate stop member between a first position and a second position.
9, An anti-barricade system according to daim 6 wherein the second fixing clement comprises a numbcr of projecting buttons located on the elongate stop m em be r.
10, An anti-barricade system according to any preceding caini wherein a second retaining means is provided and the second retaining means is adapted to be monnted on the first side of the door and arranged to cooperate with corresponding projecting buttons.
11, An anti-barricade system according to claim 10 wherein the second retaining means comprises a numbcr of retainers arrangcd to be mounted on the first side of the door and preferab'y comprises at kast a first retention plate and a second retention plate.
12. An anti-barricade system according to claim 11 wherein the or each retention plate comprises a box section arranged to be fitted to the first side of the door and further comprises an opening and a slot.
13. An anti-barricade system according to claim 12 wherein the slot is angled such that a respective fixing means is arranged to enter the slot in the retainer as the elongate stop member is moved from the first position to the second position.
14. An anti-barricade system according to any one of claims 1 to 8 wherein the second fixing element comprises a number of projecting buttons mounted on the door and corresponding second retaining means are provided on the elongate stop member.
15, An anti-barricade system according to claim 14 wherein the or each second retaining means comprises a retention plate slideably mounted in an opening in the elongate stop member.
16. An anti-barricade system according to claim 15 wherein the retention plate comprises an opening and a connecting slot.
17, An anti-barricade system according to ally one of claims 14 to 16 wherein the retention plate is slideaby moveable in the opening and wherein a stop mechanism is provided.
18. An anti-barricade system according to claim 17 wherein a locking mechanism is provided to lock the elongate stop member to the door in the second position.
19, A removable door stop for an anti-barricade system according to any preceding claim wherein the door stop is suitable for fixing to a door frame in which a door is fitted, the door stop comprising an dongate stop member adapted to be releasably secured to the door frame by means of a first releasable fixing element and having a second releasable fixing element adapted to be securable to a first side of the door in the door frame in use and wherein the &ongate stop member has a locking member that is operable to move from a first position, in which in use the first fixing element is engaged with the door frame, to a second position in which in use the first fixing element is released from the door frame and the second fixing element is secured to the first side of the door.
20. A kit of parts comprising at least one of: a door stop in accordance with claim 19; a first retaining dement adapted to be securable to a door frame, one or more fixing means arranged to be fixable to a door, and a second retaining element adapted to be secured to a first side of a door, 21, A kit of parts according to claim 20 wherein the fixing means comprise a number of bnttons adapted to co-operate with a second retaining means on the door stop, 22. A method of providing an anti-barricade door in a door frame comprising: providing a removable door stop in the form of an elongate stop member having a first releasable fixing element and a second releasable fixing element and a locking member; fixing the removable door stop to the door frame by means of the first releasable fixing element; arranging the second releasable fixing element to be seeurable to a first side of the door such that operating the locking member to move the elongate stop member from a first position to a second position releases the elongate stop member from the door frame and in the second position the elongate stop member is secured to the first side of the door.23. A method of providing an anti-barricade door in a door frame according to claim 22 wherein the door stop is arranged such that when the locking member is in the first position the first side of the door buts against a side face of the door stop.24. A method of providing an anti-barricade door in a door frame according to claim 22 or claim 23 wherein the locking member is secured.25. A fixing means adapted to be mountable on a door and arranged to cooperate with an aperture and slot in a second retaining means in a door stop in accordance with claim 19 wherein the fixing means comprise a button having a head and a stem and wherein the stcm is narrower than the head in a first orientation and is wider than the head in a second orientation perpendicular to the first orientation.26. A fixing means according to claim 25 wherein the button further comprise a ramp from a portion of the stem to the head and having a surface that is contiguous with a side surface of the head.27. An anti-barricade system substantially as described hereinbefore with reference to Figures 1 to 8 of the accompanying drawings.28. An anti-barricade system substantially as described hereinbefore with reference to Figures 9-12 of the accompanying drawings.29. A door stop for an anti-barricade system substantially as described hereinbeforc with reference to Figures 1 to 8 the accompanying drawings.30. A door stop for an anti-barricade system substantially as described hereinbefore with reference to Figures 9-12 of the accompanying drawings.