GB2228764A

GB2228764A - Bolt arrangement

Info

Publication number: GB2228764A
Application number: GB9003138A
Authority: GB
Inventors: David Alfred Whittingham; Ian Crook
Original assignee: DAW PRODUCTS Ltd
Current assignee: DAW PRODUCTS Ltd
Priority date: 1989-02-15
Filing date: 1990-02-12
Publication date: 1990-09-05
Also published as: GB9003138D0; GB8903434D0

Abstract

The arrangement 16, 16' for a door 10 comprises an elongate housing 17 having a pair of shoots 15a, 15b, at opposite ends of the housing 17 mounted for movement relative to the housing 17 between operative and inoperative positions, a manually operable handle 19, and drive means to transmit drive from said handle 19, to the shoots 15a, 15b, to move the shoots 15a, 15b in at least one direction between said operative and inoperative positions. Housing 17 is shown as comprising a back plate 20 made as an aluminium extrusion and a front cover part 21a-d made in a plurality of sections assembled with plate 20. Handle 19 acts via lever 43, links 50a, 50b and slides 55a, 55b, the shoots 15a, 15b being adjustably connected to slides 55a, 55b by connecting members (rods) 64. Front cover section 21c has a locking arrangement and detent means to retain the bolt arrangement in operative position. In an emergency a knob 100 is struck to drive a pin 93 to break a glass sheet 81 permitting shoots 15a 15b to be moved to their inoperative position; an authorised person may operate the arrangement utilising a key operated lock 73. Figures 7-9 show an alternative arrangement with a bar handle (19') and a lock mechanism (200) with a pivotable hook member (202). <IMAGE>

Description

TITLE:"Cross bolt" DESCRIPTION OF THE INVENTION This invention relates to a cross bolt for a door or the like.

An object of this invention is to provide a new or improved cross bolt for a door or like.

According to the present invention we provide a cross bolt for a door or the like comprising an elongate housing having a pair of bolts, one at each of two opposite ends of the housing, mounted for movement relative to the housing between operative and inoperative positions, a manually engageable member and drive means to transmit drive from said member to the bolts, to move the bolts in at least one direction between said operative and inoperative positions.

The invention will now be described by way of example with reference to the accompanying drawings in which: FIGURE 1 is a front view of a door having a cross bolt embodying the present invention; FIGURE 2 is a front elevation of the cross bolt of Figure 1 to an enlarged scale and with the front cover omitted; FIGURE 3 is a plan view of the cross bolt of Figure 2 but showing the front cover partly broken away; FIGURE 4 is a section on the line 4-4 of Figure 2; FIGURE 5 is a section on the line of 5-5 of Figure 2; and FIGURE 6 is a section on the line of 6-6 of Figure 2.

FIGURE 7 is a front view of an alternative embodiment of the invention with the front cover removed.

FIGURE 8 is a plan view of the cross bolt of Figure 7.

FIGURE 9 is a section on the line 9-9 of Figure 7 to an enlarged scale.

Referring to the drawings, a door 10 is hinged to a jamb 11 of a door frame 12 in conventional manner as shown at lia. The jamb 11 and the opposite jamb 13 are provided with sockets 14 to receive shoots 15a, 15b of a cross bolt 16 mounted on the door 10.

The cross bolt 16 comprises an elongate housing 17 having said shoots 15a, 15b disposed one at each of opposite ends 18a, 18b of the housing and the shoots 15a, 15b are mounted for movement outwardly of the housing from an inoperative position shown in Figure 2 to an operative position shown in Figure 1.

The housing 17 is provided with a handle 19 which is manually rotatable and a drive means 20, see Figure 2, transmits drive from the handle 19 to the shoots 15a, 15b to move them in both directions between operative and inoperative positions.

The housing 17 comprises a backing member 20 in the form of a back plate made as an extrusion of aluminium, of the cross sectional shape as shown in Figures 4 to 6.

The housing also comprises a front cover part 21 made in a plurality of sections and assembled with the backing member 20 by inter-engagement of an upturned lip 22 on a bottom edge flange 23 of the backing member 29 in a groove 24 afforded by the extruded sections of the front cover part 21 and by downturned lips 25 of top flanges 26 of the sections of the cover part 21, hooking over an upturned lip 27 provided on a inturned top flange 28 of the backing member 20 together with self-tapping screws 29 which pass through apertures 30 provided in the grooves 31 provided on the sections of the cover part 21, the widths of the grooves 31 being such that the threads of the self-tapping screws 29 cut threads in the walls of the grooves 31. The provision of the channel 31 avoids the need to position the screws 29 accurately longitudinally of the cross bolt 16.

In this example the cover part 21 comprises four separate sections indicated at 21a - 21d in Figure 1.

The sections 21a and 21d are identical and simply serve as a cover by which to enclose the interior of the housing. The sections 21a and 21d may be removed out of engagement with the backing member 20 by releasing respective screws 29 and manipulating the section out of engagement with the backing member 20 by lifting upwardly and then outwardly away from the backing member 20. This permits access to the interior of the housing for adjustment of the shoots 15a,15b as hereinafter to be described. The section 21b is however, permanently fastened to the backing plate 20 by utilising rivets or pins instead of the screws 29 or by drilling through both the backing member 20 and the cover section 2lb and inserting pins.

A handle 19 is attached to the cover section 21b by virtue of engagement of a reduced diameter boss part 36 of the handle 19 in an aperture 37 of the section 21b and the provision of a circlip 38 in a groove of the boss 36 on the interior of the section 21b. A spindle 39 is rotatably mounted in a bearing 40 fastened to the backing member 20 by screws 41 and the spindle 39 has a square end received within a correspondingly shaped recess 42 of the boss 36. A drive lever 43 is non-rotatably mounted on the spindle 39 and is secured by a nut 35 so as to be held against an upwardly facing end surface of the bearing 40. The bearing comprises a bearing sleeve 40a and a steady 40b which is screwed to the backing member 20, by the screws 41.

A pair of rigid operating links 50a, 50b are pivotally connected to each of the opposite ends of the lever 43 by bolts 51 received in a bearing bush 52 provided at the ends of the lever 43 and retained by nuts 53. The lever 43 thus comprises an eccentric to which the pair of links 50a, 50b are pivotally connected. At their other ends the pair of links 50a, 50b are similarly pivotally connected to sliders 55a, 5Sb by bolts 56 each received in a bearing bush 57 received in a respective aperture 58 of the sliders 55a, 55b and retained by a nut 59.

The sliders 55a, 55b are received in a slideway 60 provided by the backing member 20 and are generally of channel configuration having inturned lips 61 at the ends of upstanding limbs 62 to retain the sliders 55a,55b in position. The lips 61 are removed in region of the lever 43 to permit free rotation of the lever 43.

The shoots 15a, 15b are ajustably connected to the sliders or carriages 55a, 55b, by rigid connecting rods 64 or other members which are pinned, as shown at 64a, in bores provided in the shoots 15a, 15b, at their one ends and are clamped to the carriages 55a, 55b, at their other end by clamps 65 which can be thightened onto the connecting rods by screws 66. The slider clamps 65 are made of aluminium extrusions and are fastened to a slider plate 67 by the screws 66, there being two screws 66 provided for each clamp 65 at longitudinally spaced positions. By releasing the screws 66 and sliding the rods 64 longitudinally relative to the clamps 65, the distance between operative end surfaces 15'a, 15'b of the shoots 15a, 15b, relative to the spindle 39 can be adjusted.

The front cover section 21c provides the cross bolt with a locking arrangement and a detent means to retain the crossbolt in an inoperative position. The front cover section 21c is not assembled to the backing member 20 by screws but instead two stepped pins 70 are fixedly received in the groove 24, the wall of which is contoured as shown at 71 to receive and retain the pins. Reduced diameter parts 72 of the pins project outwardly of the section 21c and are pivotally and slidably received in the corresponding groove 24 of the adjacent sections 21b, 21d. A cylinder lock 73 is mounted in an aperture 74 provided in the section 21c and carries a cam member 75 which in a locking position abuts or is closely adjacent a downwardly facing surface 76 of the limb 62. In this position the cam 75 prevents lifting of the section 21c to disengage the inter-engaging lips 25 and 27.However, when a key is inserted in the cylinder lock 73 the cam 75 can be rotated to move it away from the surface 76 sufficiently to permit the section 21c to be lifted to disengage the lips 27, 25 and thus permit pivotal movement of the section 21c above the axis defined by the pins 70.

The section 21c has a large aperture punched or routed therein as shown as 80 and a sheet of glass 81 or other frangible material is mounted behind this aperture being received in channels 82 provided on the section.

Also received within the channels 82 are out-turned flanges 83 provided at the larger width end of a triangular plate 84 the apex of the triangle being offset or jiggled to lie below the surface of the section 21c adjacent to one end of the aperture 80 and having a hole therein in which a rivet 86 is received to fasten the plate 84 in position. With the glass 81 in position the flanges 83 are trapped between the glass 81 and the edges of the aperture 80. The rivet 86 prevents the glass 81 being slid out of the channels 82 in one direction whilst to prevent the glass being slid out of the channels 82 in the opposite direction the ends of the channel in the section 21d are deformed slightly to obturate movement of the glass 81 in that direction.

The plate 84 has a turned metal cup 90 fastened thereto by screws 91. Slidably mounted within the cup 90 is a stepped pin 93, the larger diameter part 94 of which is positioned within the cup 90 and adapted to have an operative end 95 pass through an aperture 96 in the plate 84. A coil compression spring 97 acts between the plate 84 and a circlip 98 provided on the pin 93 normally to bias the pin 93 in the direction away from the glass 81. A smaller diameter part 99 of the pin 93 has a knob 100 mounted thereon.

In way of the glass plate 81 the mounting member 20 is provided with an aperture 101 in which an operative end 102 of a stepped pin 103 is normally received. The pin 103 is slidably mounted on the carriage 55b by virtue of a turned metal cup 104 which is fastened by screws 105 to the plate 67 of the carriage 55b. A coil compression spring 106 acts between the cup 104 and a circlip 107 provided on the pin 103 normally to bias the pin 103 to disengage the operative part 102 from the aperture 101.

However, normally a reduced diameter part 108 of the pin 103 abuts the sheet of glass 81 to prevent disengagement of the operative 102 of the pin 103 from the aperture 101.

The plate 67 is provided with an aperture 109 which can receive the reduced diameter part 108 of the pin 103 when aligned therewith.

In use, normally the cross bolt 16 will be arranged with the shoots 15a, 15b in their operative positions and received in the recesses 14 of the jamb 11. In this condition the operative part 102 of the pin 103 is aligned with the aperture 101 and is maintained in the engagement by abutment of the reduced diameter part 108 with the glass sheet 81 and thus the crossbolt is normally locked in the operative position.In an emergency the knob 100 can be struck to drive the pin 93 against the glass plate 81 to break the glass and thus to permit the pin 103 to move under the influence of the coil compression spring 106 to disengage the operative part 102 from the aperture 101 thereby permitting the shoots 15a, 16b to be moved to their inoperative positions by rotating the handle 19 to cause the links 50a, 50b to move the carriages, 55a, 55b and hence to move the shoots 15a, 15b from their operative to inoperative positions.When the shoots 15a,15k are in their inoperative positions the smaller diameter part 108 of the p n 101 moves into alignment with an aperture 109'of plate 84 and thus enters the aperture 109 thereby retaining the shoots 15a,15b in their inoperative positions so preventing inadvertent subsequent locking of the door.

The drive means for driving the shoots 15a,15b from their operative to inoperative positions can be operated as a result of a rotating handle 19 either ciockwise or anticlockwise thereby facilitating use. In addition the drive means resists any pressure applied to the shoots 15a,15b in their operative positions since, in the operative position, the shoots 15a,15b, carriages 55a,55b, links 50a,50b and lever 43 are substantially all rectilinearly disposed.

If it is desired to operate the crossbolt 16 without breaking the glass 81 an authorised person may do so by opening the front cover section 21c utilising the key operated lock 73.

By providing steel rods 64 as the connection between the shoots 15ss,15b and the carriages 55a,55 the weight of the unit is minimised and this permits a crossbolt 16 embodying the invention to be used as a vertical unit spanning from top to bottom of a door or horizontally as shown in thedrawings. By utilising rods 24 to extend the length of the shoots 15a,15b a reduction in weight of one fifth compared with the weight of a comparable length of solid shoot 15a,15b is achieved. For production purposes the shoots are always of the same dimensions irrespective of the length of the unit and it is only necessary to change the length of the connecting rods 24.

If required, further slider assemblies may be provided within the channel 62 to support extra long rods.

End caps 110 are provided at opposite ends of the housing with apertures 111 therein to receive the shoots and these apertures guide the shoots, together with the connecting rods for the above mentioned sliding movement.

The end caps 110 are fastened to the back plate 20 by screws 113 received in lugs 112 integral with the end 0 caps and bent through 90 If desired a microswitch 120 may be mounted on a bracket 121 in a position where it will be operated by the action of the cam and lock 75, 73. As a result, if the section 21c is closed but not locked, then this state will be revealed by this switch being open circuit. A further microswitch 123 with a long operating lever 124 is mounted on another bracket 125 so that the switch is operated upon by the glass 81 when the section 21c is closed. Since the glass 81 also depresses the locking pin 103 to cause it to engage in the aperture 101 in the backing member 20 the switch 124 indicates whether or not the unit is secure.

Referring now to Figures 7 to 9, there is shown an alternative embodiment of the invention which operates and is constructed similarly to the embodiment shown in Figures 1 to 6 and corresponding parts are therefore indicated with the same reference numerals.

However, the cross bolt 16' of Figures 7 to 9 differs from that shown at 10 in Figures 1 to 6 in at least the following respects.

The handle which transmits drive to the shoots 15a,15b, indicated at 19' comprises a bar so as to give increased mechanical advantage when extending or retracting the shoots 15a,15b.

The cross bolt 16' is provided with a lock mechanism 200 which comprises a lockable barrel 201 and a pivotable hook member 202. The arrangement is such that when the shoots 15a,15b are moved inwardly, to a position as shown in Figures 7 and 8, a pin 203 carried by the left hand spider 55a engages a cam surface 204 of the hook member 202 to pivot the hook member against the force cf a light spring until the pin 203 enters a hook recesses 205 of the member 202 where the pin 203 will be entrapped. Thus after the shoots 15a,15b have been moved inwardly, it is not possible inadvertently to extend the shoots 15alb again because the slider 55a and hence the entire drive mechanism 20 will be locked by the hook member 202.

The hook member 202 can be pivoted to release the pin 203 by use of the correct key in the barrel 201.

The cross bolt 16' of figures 7 to 9 does not have a glass or other frangible plate to retain spring pin 101 in its inward position, but rather, a retainer plate 206 is provided which is slidable in slider formations 207 provided by the front cover section part 21c of the front cover 21. The plate 206 has a groove 208 provided in it.

With the plate 205 in its extreme right hand position as seen in figure 8, (in dotted lines) the pin 101 bears on the underside of the plate 206 in a region where the groove 207 is not provided.

When the plate 206 is slid to left as in figure 8, the pin 101 enters the groove 207 and thus is moved by the force of spring 106 to disengage formation 102 of the back plate and thus release the drive mechanism 20 for operation, in the same manner as described for the cross bolt of figures 1 to 6.

To enable the plate 206 to be slid, a knob 209 is provided fixed to the plate 206, the knob 209 having an inclined cam surface 211 along which the pin 101 moves during the sliding movement of the plate 205, to help the pin 101 move into the groove 207 of the plate 205.

In the cross bolt of figures 7 to 9, there is only one switch 212 which closes (or opens) an electrical circuit when the cross bolt 16' is operated so as to withdraw the shoot bolts 15a,15b, to provide a signal to warn security for example, that a door on which the cross bolt 16' is provided, is in an open condition.

The features disclosed in the foregoing description, or the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for attaining the disclosed result, as appropriate, may, separately or in any combination of such features, be utilised for realising the invention in diverse forms thereof.

Claims

1. A cross bolt for a door or the like comprising an elongate housing having a pair of bolts, one at each of two opposite ends of the housing, mounted for movement relative to the housing between operative and inoperative positions, a manually engageable member and drive means to transmit drive from said member to the bolts, to move the bolts in at least one direction between said operative and inoperative positions.

2. A cross bolt according to claim 1 wherein thedrive means comprises a rigid link pivotally connected between a bolt and an eccentric rotated by said member.

3. A cross bolt according to claim 2 wherein the eccentric is provided on a rotatable element fixed to said member.

4. A cross bolt according to any one of claims 1 to 3 wherein at least one bolt is connected to a carriage by adjustable connecting means whereby the distance between an operative end of the bolt and the carriage is adjustable.

5. A cross bolt according to any one of claims 1 to 4 wherein the connecting means comprises a rigid member adjustably mounted on said bolt and carriage by an adjustable mounting.

6. A cross bolt according to claim 5 wherein said adjustable mounting comprises releasable clamping means.

7. A cross bolt according to claim 6 wherein said adjustable mounting comprises releasable clamping means.

8. A cross bolt according to claim 6 or claim 7 wherein the rigid member is fixed to the bolt and is adjustable relative to the carriage.

9. A cross bolt according to any one of the preceding claims wherein means are provided to maintain the bolts in said inoperative position.

10. A cross bolt according to claim 9 wherein the maintaining means comprise a resiliently biased member engageable with an abutment provided on a bolt or a member connected to a bolt.

11. A cross bolt according to claim 9 wherein said mechanism comprises an abutment provided on a bolt or carriage which co-operates with a locking element as the bolt or carriage is moved to the inoperative position.

12. A cross bolt according to claim 11 wherein the abutment is a pin and the locking element comprises a hook member which engages the pin as the bolt is moved to the inoperative position.

13. A cross bolt according to claim 12 wherein the abutment and locking element when egaged are maintained in a locked condition until the lock is released.

14. A cross bolt according to any one of the preceding claims wherein the housing is provided with a locking means to prevent movement of the bolts from the operative to an inoperative position.

15. A cross bolt according to claim 14 wherein the locking means comprises a locking member maintained in a locking position by a retaining member.

16. A cross bolt according to claim 15 wherein in said locking position the locking member is engaged with an abutment.

17. A crossbolt according to claim 16 wherein in said locking position the locking member is engaged with an abutment comprising an aperture of said bolt.

18. A cross bolt according to claim 16 or claim 17 wherein the retaining member comprises a frangible member which may be broken by a striker element movably mounted on the housing to be manually driven against the frangible member.

19. A cross bolt according to claim 18 wherein the locking member is resiliently biased in a direction out of said locking position and into engagement with said frangible member so that on breaking the frangible member the locking member is moved out of said locking position.

20. A cross bolt according to claim 18 or claim 19 wherein the striker element is a knob slidably mounted on the housing and normally resiliently biased away from the frangible member and movable manually into breaking relationship with the frangible member.

21. A cross bolt according to claim 16 or claim 17 wherein the retaining member comprises a slidably mounted plate having an aperture, the plate being movable from a retaining position in which the locking member is maintained in the locking position, to a release position in which the locking member can enter the slot in the plate and hence move out of said locking position.

22. A cross bolt according to claim 21 wherein the locking member is biased by resilient biasing means towards the plate and hence into the slot of the plate, when the plate is appropriately moved.

23. A cross bolt according to any one of the preceding claims wherein the housing comprises an assembly of a backing member and a front member.

24. A cross bolt according to any one of the preceding claims wherein the front member comprises a plurality of sections at least one of which is releasably assembled with the backing member to permit of access to the interior of the housing.

25. A cross bolt according to claim 24 wherein the l;ocking means which prevents movement of the bolts, is provided on a locking section of said front member.

26. A cross bolt according to claim 23 or claim 24, or claim 25, wherein the backing member and the front member each comprise aluminium extrusions.

27. A cross bolt substantially as hereinbefore described with reference to and as shown in Figures 1 to 6 of the accompanying drawings.

28. A cross bolt substantially as hereinbefore described with reference to and as shown in Figures 7 to 9 of the accompanying drawings.

29. Any novel feature or novel combination of features as herein defined and/or shown in the accompanying drawings.