CA1251240A - Door latch arrangement - Google Patents
Door latch arrangementInfo
- Publication number
- CA1251240A CA1251240A CA000478416A CA478416A CA1251240A CA 1251240 A CA1251240 A CA 1251240A CA 000478416 A CA000478416 A CA 000478416A CA 478416 A CA478416 A CA 478416A CA 1251240 A CA1251240 A CA 1251240A
- Authority
- CA
- Canada
- Prior art keywords
- door
- arrangement according
- doors
- movement
- prime mover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000002955 isolation Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/50—Power-operated mechanisms for wings using fluid-pressure actuators
- E05F15/56—Power-operated mechanisms for wings using fluid-pressure actuators for horizontally-sliding wings
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B65/00—Locks or fastenings for special use
- E05B65/10—Locks or fastenings for special use for panic or emergency doors
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/40—Application of doors, windows, wings or fittings thereof for gates
- E05Y2900/404—Application of doors, windows, wings or fittings thereof for gates for railway platform gates
Landscapes
- Power-Operated Mechanisms For Wings (AREA)
- Lock And Its Accessories (AREA)
Abstract
ABSTRACT
Door latch arrangement A latch arrangement for emergency opening of, particularly, railway platform screen doors is described. These doors are power operated and are opened automatically, or under remote control, when a railway train has come to a halt at the platform with its doors in register with the screen doors. For emergency opening of the screen doors a handle is provided on the track side, thereby to be accessible to a train passenger, which will dis-engage the door latch members and de-energise the prime mover for opening and closing the doors, thus permitting the doors to be opened manually. In the particular embodiment the handle is connected to a vertically extending rod carried in the door which abuts, when the door is closed, a further rod in the door-headframe which dis-engages the latch members and releases pressure from a pneumatic door actuator, a spring loaded detent mechanism holds the headframe member in the deployed position, so that the prime mover is not re-energised.
Door latch arrangement A latch arrangement for emergency opening of, particularly, railway platform screen doors is described. These doors are power operated and are opened automatically, or under remote control, when a railway train has come to a halt at the platform with its doors in register with the screen doors. For emergency opening of the screen doors a handle is provided on the track side, thereby to be accessible to a train passenger, which will dis-engage the door latch members and de-energise the prime mover for opening and closing the doors, thus permitting the doors to be opened manually. In the particular embodiment the handle is connected to a vertically extending rod carried in the door which abuts, when the door is closed, a further rod in the door-headframe which dis-engages the latch members and releases pressure from a pneumatic door actuator, a spring loaded detent mechanism holds the headframe member in the deployed position, so that the prime mover is not re-energised.
Description
:lZSlZ~
Door latch arran~ement The invention relates to a door latch arrangement.
The invention is particularly useful as an emergency release mechanism for actuator driven doors which are positively latched in the closed position.
Doors of this type may be found on vehicles, particularly railway vehicles, and most recently as safety doors along the edge of a platform in an underground railway or mass rapid transit railway system.
According to the invention there is provided a latch arrangement for at least one door having an opening and closing mechanism comprising co-operating latch members arranged to mutually engage to latch a door in the closed position and, for unlatching the door manually, a handle in the door connected to a first unlatching member carried in the door which is arranged upon movement of the handle to unlatch the co-operating members, and in a door-frame a member disposed to abut the member in the door, in the closed postion, for movement therewith to effect de-energisation of a prime mover in the opening and closing mechanism.
In the case where the door is driven by a pneumatic actuator, the door-frame member is arranged to release pneumatic pressure from an actuator cylinder to permit movement of the door. Preferrably when the actuator is electrically controlled the headframe member may be arranged to effect electrical isolation of the actuator.
The invention, and how it may be carried into practice, will now be described by way of example of L~40 only, with reference to the accompanying drawings, in which:
Fig 1 shows a general view of a door latch arrangement, Fig 2 shows a detail view of part of the emergency release mechanism, and Fig 3 shows a detail view of the door latching mechanism.
The embodiment of the invention which will now be particularly described concerns platform edge doors, which according to latest safety thinking, are installed along a platform edge in an underground railway or mass transit station to provide an effective safety screen between waiting passengers on the platform and the railway track area and 20 particularly a moving vehicle. In a typical installation there is provided a continuous half-glazed screen along the platform edge with sliding doors spaced apart at intervals co-incident with the door spacing of the railway vehicles.
The screen doors are operated by actuators and normally latched in the closed position except when a train has come to rest in the correct position whereupon the screen doors are opened, together with the vehicle doors, to permit passengers to enter and exit the vehicle. The screen doors maybe automatically or, at least, remotely operated and are not intentionally provided with any means of opening accessible to waiting passengers.
However, in order to allow vehicle passengers to leave the vehicle in an emergency, it is intended to ~'~5~1 'Z~
provide an emergency door unlatching mechanism which can be operated by passengers only from the track side of the screen doors, although facility is provided for operation from the platform side by authorised personnel by means of a special key. Each door, or each set of doors, is provided with a handle on the track side which may be operated by a passenger standing in the open doorway of a vehicle, and which unlatches the doors. Preferrably this also releases pneumatic pressure from the door actuator which maybe retained normally to positively hold the screen doors in the closed position. Thus in an emergency the screen doors can be opened manually.
Referring now to Fig 1 there is shown a side view of part of a screen door carriage and latching mechanism for a pair of bi-parting doors. The two doors are of the sliding type and are carried by roller carriages, two of which are shown at 3 and 4 respectively which run in roller tracks 5 and 6 extending longitudinally with respect to the screen (not shown) and positioned above the door opening and to either side thereof. The inner edges of the doors are provided with lip seals la and 2a which abut each other when the doors are closed, as shown in the drawings.
The doors 1 and 2 are suspended from carriages 3 and 4 by brackets 7 and 8 which extend downwardly through elongate slots in the underside of a headframe cover. The tracks 5 and 6 carriage, brackets and other parts of the mechanism are all concealed by the headframe cover, not shown in the drawing.
The actuator which powers the door closing/opening mechanism is generally indicated at 9 and comprises a long stroke, double-acting linear actuator in which a 12S~
moving piston (not shown) located within the cylinder 10 of the actuator is connected to an actuator rod 11.
The motive power of the actuator 9 is provided by pneumatic pressure which maybe admitted through valve means to either end of the actuator cylinder 10.
Thus, by moving the piston the rod 11 can be extended leftwards in the drawing to open the doors, or retracted to close the doors. The actuator rod 11 is connected to the drive bracket 13 of the left hand door 1 and the actuator force is transmitted to the right hand door 2 by an endless belt 30 connected to both brackets. In the drawing the door on the ]eft is driven and that on the right is a slave door.
The mechanism for latching the doors in the closed position comprises a pivoted latch member 12 mounted on the bracket 13 of the driver door and which a hooked part 12a engages with a peg or block 14a fixed to ~he bracket 14 of the slave door. The latch member 12 may be pivoted anti-clockwise to disengage the latch release the doors from the locked position.
The latch member 12 is operated by abutment with a flanged latch striker 15 carried towards the outer end of the actuator rod 11. This remote end of rod 11 is provided with a resilient overtravel mechanism 16, by means of which the drive bracket 13 is connected to the actuator rod 11 for limited relative movement.
When the driven door and therefore drive bracket 13, has reached the closed position the rod 11 is permitted a limited amount of overtravel during which the latch striker 15 abuts a heal 17 on part of the latch member 12, and rotates the member 12 into locking engagement with latch block 14a on the brackets 14, providing that the slave door has not been obstructed and has also completely closed. This position of the rod 11 and associated parts, reached lZ5~Z~O
through the overtravel movement, is held while the doors are locked, by residual pressure in the actuator 9.
In a normal opening sequence as soon as pressure is vented from the "closing" end of the actuator cylinder 10 the resilience of the overtravel mechanism 15 takes up the overtravel distance thereby moving the latch member 12 to the unlatched position which allows the doors to be moved by subsequent further movement of the actuator rod 11 under the influence of pneumatic pressure in the "opening" end of the cylinder. The emergency unlatching mechanism provided by the invention is intended inter alia to permit 15 manual release of the trapped pressure in the actuator thereby unlatching the doors so that they may be pushed open.
As previously mentioned, the screen doors have an emergency release handle (not shown) for manual operation located on the track side of one of the doors. The emergency release handle is connected to a push rod 18 mounted within the door 2 for vertical axial movement. Co-axial with the rod 18, but mounted for vertical axial movement within the headframe space is a further rod or member comprising two parts 19 (Fig. 2) and l9a (Fig. 3) which carry several fixed abutments or flanges, a first of these is a member 20 fixed to the rod 19 adjacent latch member 12 and in a position to abut a pin 20a secured in the latch member 12. A second such member provides a shoulder 21 on the rod 19 adjacent an isolating valve 22 connected in the pneumatic system of actuator 9. Isolating valve 22 comprises a pressure release valve having a valve operating member 23 which is depressed to open the valve 22 and release actuator press~re.
~ ~ 5~
Normally, that is when the door emergency release handle is not operated, the upper end of rod 18 is substantially flush with the upper surface of door 2, when the handle is operated the rod 18 is extended into the headframe space abuting the lower end of rod 19 thereby moving it axially and vertically upwards.
The corresponding upward movement of rod 19 brings member 20 into abutment with the pin 20a of latch member 12 (see Fig 3), and the shoulder 21 into contact with the operating member 23 of the isolating valve 22 (see Fig 2). Deployment of the emergency release handle causes the shoulder 21 to depress the operating member 23 releasing pressure from the actuator cylinder, to rotate the latch member 12 in an anti-clockwise direction to unlatch the doors.
Thereafter, it is possible for the doors 1 and 2 to be manually pushed back from the closed position since there will now be no opposing force other than the inertia and friction of the mechanism.
The emergency release arrangement of the described embodiment only isolates the pneumatic parts of the door actuator system and leaves the electrical control system uninterrupted. In an alternative arrangement it may be preferred to break the electrical control circuits also, for example by means of a switch, such as a microswitch 24, connected in series with the control circuits and operated by the shoulder 21. The switch 24, in the embodiment, is a rocker type switch and the rocker operating member is disposed to be engaged by the shoulder 21 formed on rod 19 and preferably subsequent to said shoulder having deployed the valve operating member 23.
Upon the doors being manually opened, the lower part of the rod 19a resets to allow the doors to be manually closed and latched, but retaining pneumatic i~ 51'~ ~
or pneumatic and electrical isolation. The member comprising shoulder 21 on rod ].9 also provides two stepped shoulders 25 and 26, seen in Fig 2, which co-operate with a spring loaded plunger or detent mechanism to engage and hold the rod 19 in either of two deployed positions. This mechanism comprises a plunger 27, sprung against the member 21a by a coil spring 28 in compression. The plunger may be withdrawn against the bias of spring 28 by means of a latch type arrangement operated by a square drive keyway 29, a co-operating key being normally issued to authorised personnel for the purpose of resetting the emergency door release mechanism.
In emergency operation use of the passenger handle raises the member 21a sufficiently for the plunger 27 to extend by a first step and positively engage the first step 25, in which position the pneumatic isolation valve 22 is operated enabling the doors to be opened manually. Engagement of the plunger 27 with the shoulder 25 ensures that pneumatic pressure cannot be readmitted to the actuator until the mechanism is reset.
The rod l9 may be raised further to obtain operation of the electrical isolation switch 24, in which position plunger 21 extends to a second step engaging with the second stepped shoulder 26. Again the electrical circuits can only be remade by resetting the mechanism by withdrawal of plunger 27.
This second position cannot normally be achieved by operation of the passenger accessible door mounted emergency handle only, because the rod located in the door does not impart sufficient lift to the rod in the door-frame housing.
The additional lift required is provided in one ~251,'~
embodiment by means of a straight forward lifting handle 34 attached to the member 21a, see Fig 2.
In an alternative arrangement, which is depicted in Fig 1 the door actuator may be isolated e.g. for maintenance by means of a lever 33 pivoted about a horizontal a~is 31 and having at one end a handle 32 which may be pulled down on the platform side of the platform doors. The other end of lever 33 is linked to the upper end of rod 19, so that by pulling down on the handle 32 the rod 19 is lifted and the actuator isolating valve 22 is operated.
Door latch arran~ement The invention relates to a door latch arrangement.
The invention is particularly useful as an emergency release mechanism for actuator driven doors which are positively latched in the closed position.
Doors of this type may be found on vehicles, particularly railway vehicles, and most recently as safety doors along the edge of a platform in an underground railway or mass rapid transit railway system.
According to the invention there is provided a latch arrangement for at least one door having an opening and closing mechanism comprising co-operating latch members arranged to mutually engage to latch a door in the closed position and, for unlatching the door manually, a handle in the door connected to a first unlatching member carried in the door which is arranged upon movement of the handle to unlatch the co-operating members, and in a door-frame a member disposed to abut the member in the door, in the closed postion, for movement therewith to effect de-energisation of a prime mover in the opening and closing mechanism.
In the case where the door is driven by a pneumatic actuator, the door-frame member is arranged to release pneumatic pressure from an actuator cylinder to permit movement of the door. Preferrably when the actuator is electrically controlled the headframe member may be arranged to effect electrical isolation of the actuator.
The invention, and how it may be carried into practice, will now be described by way of example of L~40 only, with reference to the accompanying drawings, in which:
Fig 1 shows a general view of a door latch arrangement, Fig 2 shows a detail view of part of the emergency release mechanism, and Fig 3 shows a detail view of the door latching mechanism.
The embodiment of the invention which will now be particularly described concerns platform edge doors, which according to latest safety thinking, are installed along a platform edge in an underground railway or mass transit station to provide an effective safety screen between waiting passengers on the platform and the railway track area and 20 particularly a moving vehicle. In a typical installation there is provided a continuous half-glazed screen along the platform edge with sliding doors spaced apart at intervals co-incident with the door spacing of the railway vehicles.
The screen doors are operated by actuators and normally latched in the closed position except when a train has come to rest in the correct position whereupon the screen doors are opened, together with the vehicle doors, to permit passengers to enter and exit the vehicle. The screen doors maybe automatically or, at least, remotely operated and are not intentionally provided with any means of opening accessible to waiting passengers.
However, in order to allow vehicle passengers to leave the vehicle in an emergency, it is intended to ~'~5~1 'Z~
provide an emergency door unlatching mechanism which can be operated by passengers only from the track side of the screen doors, although facility is provided for operation from the platform side by authorised personnel by means of a special key. Each door, or each set of doors, is provided with a handle on the track side which may be operated by a passenger standing in the open doorway of a vehicle, and which unlatches the doors. Preferrably this also releases pneumatic pressure from the door actuator which maybe retained normally to positively hold the screen doors in the closed position. Thus in an emergency the screen doors can be opened manually.
Referring now to Fig 1 there is shown a side view of part of a screen door carriage and latching mechanism for a pair of bi-parting doors. The two doors are of the sliding type and are carried by roller carriages, two of which are shown at 3 and 4 respectively which run in roller tracks 5 and 6 extending longitudinally with respect to the screen (not shown) and positioned above the door opening and to either side thereof. The inner edges of the doors are provided with lip seals la and 2a which abut each other when the doors are closed, as shown in the drawings.
The doors 1 and 2 are suspended from carriages 3 and 4 by brackets 7 and 8 which extend downwardly through elongate slots in the underside of a headframe cover. The tracks 5 and 6 carriage, brackets and other parts of the mechanism are all concealed by the headframe cover, not shown in the drawing.
The actuator which powers the door closing/opening mechanism is generally indicated at 9 and comprises a long stroke, double-acting linear actuator in which a 12S~
moving piston (not shown) located within the cylinder 10 of the actuator is connected to an actuator rod 11.
The motive power of the actuator 9 is provided by pneumatic pressure which maybe admitted through valve means to either end of the actuator cylinder 10.
Thus, by moving the piston the rod 11 can be extended leftwards in the drawing to open the doors, or retracted to close the doors. The actuator rod 11 is connected to the drive bracket 13 of the left hand door 1 and the actuator force is transmitted to the right hand door 2 by an endless belt 30 connected to both brackets. In the drawing the door on the ]eft is driven and that on the right is a slave door.
The mechanism for latching the doors in the closed position comprises a pivoted latch member 12 mounted on the bracket 13 of the driver door and which a hooked part 12a engages with a peg or block 14a fixed to ~he bracket 14 of the slave door. The latch member 12 may be pivoted anti-clockwise to disengage the latch release the doors from the locked position.
The latch member 12 is operated by abutment with a flanged latch striker 15 carried towards the outer end of the actuator rod 11. This remote end of rod 11 is provided with a resilient overtravel mechanism 16, by means of which the drive bracket 13 is connected to the actuator rod 11 for limited relative movement.
When the driven door and therefore drive bracket 13, has reached the closed position the rod 11 is permitted a limited amount of overtravel during which the latch striker 15 abuts a heal 17 on part of the latch member 12, and rotates the member 12 into locking engagement with latch block 14a on the brackets 14, providing that the slave door has not been obstructed and has also completely closed. This position of the rod 11 and associated parts, reached lZ5~Z~O
through the overtravel movement, is held while the doors are locked, by residual pressure in the actuator 9.
In a normal opening sequence as soon as pressure is vented from the "closing" end of the actuator cylinder 10 the resilience of the overtravel mechanism 15 takes up the overtravel distance thereby moving the latch member 12 to the unlatched position which allows the doors to be moved by subsequent further movement of the actuator rod 11 under the influence of pneumatic pressure in the "opening" end of the cylinder. The emergency unlatching mechanism provided by the invention is intended inter alia to permit 15 manual release of the trapped pressure in the actuator thereby unlatching the doors so that they may be pushed open.
As previously mentioned, the screen doors have an emergency release handle (not shown) for manual operation located on the track side of one of the doors. The emergency release handle is connected to a push rod 18 mounted within the door 2 for vertical axial movement. Co-axial with the rod 18, but mounted for vertical axial movement within the headframe space is a further rod or member comprising two parts 19 (Fig. 2) and l9a (Fig. 3) which carry several fixed abutments or flanges, a first of these is a member 20 fixed to the rod 19 adjacent latch member 12 and in a position to abut a pin 20a secured in the latch member 12. A second such member provides a shoulder 21 on the rod 19 adjacent an isolating valve 22 connected in the pneumatic system of actuator 9. Isolating valve 22 comprises a pressure release valve having a valve operating member 23 which is depressed to open the valve 22 and release actuator press~re.
~ ~ 5~
Normally, that is when the door emergency release handle is not operated, the upper end of rod 18 is substantially flush with the upper surface of door 2, when the handle is operated the rod 18 is extended into the headframe space abuting the lower end of rod 19 thereby moving it axially and vertically upwards.
The corresponding upward movement of rod 19 brings member 20 into abutment with the pin 20a of latch member 12 (see Fig 3), and the shoulder 21 into contact with the operating member 23 of the isolating valve 22 (see Fig 2). Deployment of the emergency release handle causes the shoulder 21 to depress the operating member 23 releasing pressure from the actuator cylinder, to rotate the latch member 12 in an anti-clockwise direction to unlatch the doors.
Thereafter, it is possible for the doors 1 and 2 to be manually pushed back from the closed position since there will now be no opposing force other than the inertia and friction of the mechanism.
The emergency release arrangement of the described embodiment only isolates the pneumatic parts of the door actuator system and leaves the electrical control system uninterrupted. In an alternative arrangement it may be preferred to break the electrical control circuits also, for example by means of a switch, such as a microswitch 24, connected in series with the control circuits and operated by the shoulder 21. The switch 24, in the embodiment, is a rocker type switch and the rocker operating member is disposed to be engaged by the shoulder 21 formed on rod 19 and preferably subsequent to said shoulder having deployed the valve operating member 23.
Upon the doors being manually opened, the lower part of the rod 19a resets to allow the doors to be manually closed and latched, but retaining pneumatic i~ 51'~ ~
or pneumatic and electrical isolation. The member comprising shoulder 21 on rod ].9 also provides two stepped shoulders 25 and 26, seen in Fig 2, which co-operate with a spring loaded plunger or detent mechanism to engage and hold the rod 19 in either of two deployed positions. This mechanism comprises a plunger 27, sprung against the member 21a by a coil spring 28 in compression. The plunger may be withdrawn against the bias of spring 28 by means of a latch type arrangement operated by a square drive keyway 29, a co-operating key being normally issued to authorised personnel for the purpose of resetting the emergency door release mechanism.
In emergency operation use of the passenger handle raises the member 21a sufficiently for the plunger 27 to extend by a first step and positively engage the first step 25, in which position the pneumatic isolation valve 22 is operated enabling the doors to be opened manually. Engagement of the plunger 27 with the shoulder 25 ensures that pneumatic pressure cannot be readmitted to the actuator until the mechanism is reset.
The rod l9 may be raised further to obtain operation of the electrical isolation switch 24, in which position plunger 21 extends to a second step engaging with the second stepped shoulder 26. Again the electrical circuits can only be remade by resetting the mechanism by withdrawal of plunger 27.
This second position cannot normally be achieved by operation of the passenger accessible door mounted emergency handle only, because the rod located in the door does not impart sufficient lift to the rod in the door-frame housing.
The additional lift required is provided in one ~251,'~
embodiment by means of a straight forward lifting handle 34 attached to the member 21a, see Fig 2.
In an alternative arrangement, which is depicted in Fig 1 the door actuator may be isolated e.g. for maintenance by means of a lever 33 pivoted about a horizontal a~is 31 and having at one end a handle 32 which may be pulled down on the platform side of the platform doors. The other end of lever 33 is linked to the upper end of rod 19, so that by pulling down on the handle 32 the rod 19 is lifted and the actuator isolating valve 22 is operated.
Claims (18)
1. A latch arrangement for at least one door having an opening and closing mechanism comprising co-operating latch members arranged to mutually engage to latch a door in the closed position and, for unlatching the door manually, a handle in the door connected to a first unlatching member carried in the door which is arranged upon movement of the handle to unlatch the co-operating members, and in a door-frame a member disposed to abut the member in the door, in the closed postion, for movement therewith to effect de-energisation of a prime mover in the opening and closing mechanism.
2. An arrangement according to claim 1 wherein the members in the door and the door-frame are arranged for axial movement on a common axis when the door is closed.
3. An arrangement according to either claim 1 or claim 2 wherein the handle is disposed on one side of the door only.
4. An arrangement according to claim 1, wherein the prime mover is a pneumatic actuator and the member in the door-frame acts to release pressure in the actuator.
5. An arrangement according to claim 1, wherein the prime mover is electrically controlled and the member in the door-frame acts to effect electrical isolation.
6. An arrangement according to claim 4 wherein said door-frame member carries an abutment dispos operate at least a pneumatic pressure release valve upon movement of the member.
7. An arrangement according to claim 6 wherein the door-frame member comprises a rod or the like and the abutment is formed by a section of increased lateral dimension.
8. An arrangement according to claim 7 wherein at least the release valve is operated by depression of a valve operating member disposed to be engaged by the abutment.
9. An arrangement according to claim 5, wherein said door-frame member has an abutment disposed to operate an electrical isolation switch.
10. An arrangement according to claim 1 wherein the prime mover is a pneumatic actuator and has a valve connected to release pressure in the actuator when operated, and said prime mover is electrically controlled and has a switch connected when operated to electrically isolate the actuator and the door-frame member has a two-part movement and is arranged to operate the pressure release valve in a first part of its movement and the electrical isolation switch in a second part of its movement.
11. An arrangement according to claim 10 wherein said second movement of the door-frame member may be achieved only by operation of the second manual operator.
12. An arrangement according to claim 11, wherein a detent mechanism is disposed to engage and hold the door-frame member in an operated position to maintain de-energisation of the prime mover.
13. An arrangement according to claim 12 in wherein the detent mechanism is disposed to engage and hold the door-frame member in either of said two parts of its movement.
14. An arrangement according to claim 12, wherein the detent mechanism comprises a spring biased member adapted to engage a shoulder formed on the movable member.
15. An arrangement according to claim 14 wherein the spring biased member is retractable manually by means a key.
16. An arrangement according to claim 12, wherein the door-frame member is comprised of two abutting parts, a first of which abuts the member carried by the door and is arranged to unlatch the engaged door latch members, and a second part of which is adapted for de-energising the prime mover, and only said second part is engaged and held by the detent of mechanism.
17. An arrangement according to claim 1, wherein the door or doors are provided in a railway platform screen and the door handle is located on the railway track side of the door.
18. An arrangement according to claim 17 wherein the second handle is provided on the opposite, i.e. the platform side, of the screen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB848408879A GB8408879D0 (en) | 1984-04-06 | 1984-04-06 | Door latch arrangement |
GB8408879 | 1984-04-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1251240A true CA1251240A (en) | 1989-03-14 |
Family
ID=10559265
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000478416A Expired CA1251240A (en) | 1984-04-06 | 1985-04-04 | Door latch arrangement |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0158502A1 (en) |
JP (1) | JPS60226981A (en) |
CA (1) | CA1251240A (en) |
ES (1) | ES8605609A1 (en) |
GB (2) | GB8408879D0 (en) |
HK (1) | HK90588A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH077502Y2 (en) * | 1987-07-30 | 1995-02-22 | トステム株式会社 | Inner window automatic lock device |
CN111963010A (en) * | 2020-07-24 | 2020-11-20 | 宁波中车时代电气设备有限公司 | Aluminum profile frame's platform door emergency door and end door |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1189346B (en) * | 1961-08-05 | 1965-03-18 | Hardy Geb Maschf Ag | Three-way slide or valve, especially for emergency actuation of pneumatically or electro-pneumatically controlled door systems |
JPS47654U (en) * | 1971-01-16 | 1972-08-04 | ||
JPS483205U (en) * | 1971-05-19 | 1973-01-16 | ||
IT1116289B (en) * | 1977-03-21 | 1986-02-10 | Wabco Westinghouse Spa | SLIDING DOOR FOR VIARIE IRON CARRIAGES, MANUALLY OPERATED AND EQUIPPED WITH A PNEUMATIC DEVICE FOR CLOSING WITH REMOTE CONTROL |
GB2046828B (en) * | 1979-02-10 | 1983-02-02 | Westinghouse Brake & Signal | Sliding door latching mechanisms |
-
1984
- 1984-04-06 GB GB848408879A patent/GB8408879D0/en active Pending
-
1985
- 1985-04-03 GB GB08508749A patent/GB2156897B/en not_active Expired
- 1985-04-03 ES ES541967A patent/ES8605609A1/en not_active Expired
- 1985-04-03 EP EP85302331A patent/EP0158502A1/en not_active Withdrawn
- 1985-04-04 CA CA000478416A patent/CA1251240A/en not_active Expired
- 1985-04-05 JP JP60071286A patent/JPS60226981A/en active Pending
-
1988
- 1988-11-10 HK HK905/88A patent/HK90588A/en unknown
Also Published As
Publication number | Publication date |
---|---|
ES8605609A1 (en) | 1986-03-16 |
EP0158502A1 (en) | 1985-10-16 |
GB2156897A (en) | 1985-10-16 |
JPS60226981A (en) | 1985-11-12 |
GB8508749D0 (en) | 1985-05-09 |
GB8408879D0 (en) | 1984-05-16 |
HK90588A (en) | 1988-11-18 |
ES541967A0 (en) | 1986-03-16 |
GB2156897B (en) | 1987-07-29 |
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