CA1106860A - Sliding plug door mechanisms - Google Patents
Sliding plug door mechanismsInfo
- Publication number
- CA1106860A CA1106860A CA267,378A CA267378A CA1106860A CA 1106860 A CA1106860 A CA 1106860A CA 267378 A CA267378 A CA 267378A CA 1106860 A CA1106860 A CA 1106860A
- Authority
- CA
- Canada
- Prior art keywords
- door
- actuator
- plugging
- sliding
- sliding plug
- 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
- 230000007246 mechanism Effects 0.000 title claims abstract description 40
- 230000033001 locomotion Effects 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 230000001419 dependent effect Effects 0.000 claims 1
- 230000011664 signaling Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000000414 obstructive effect Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D15/00—Suspension arrangements for wings
- E05D15/06—Suspension arrangements for wings for wings sliding horizontally more or less in their own plane
- E05D15/10—Suspension arrangements for wings for wings sliding horizontally more or less in their own plane movable out of one plane into a second parallel plane
- E05D15/1002—Suspension arrangements for wings for wings sliding horizontally more or less in their own plane movable out of one plane into a second parallel plane specially adapted for use in railway-cars or mass transit vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D19/00—Door arrangements specially adapted for rail vehicles
- B61D19/003—Door arrangements specially adapted for rail vehicles characterised by the movements of the door
- B61D19/009—Door arrangements specially adapted for rail vehicles characterised by the movements of the door both sliding and plugging, (e.g. for refrigerator cars)
-
- 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
- E05F15/565—Power-operated mechanisms for wings using fluid-pressure actuators for horizontally-sliding wings for railway-cars
-
- 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
- E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
- E05Y2900/51—Application of doors, windows, wings or fittings thereof for vehicles for railway cars or mass transit vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Devices For Sliding Doors (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
Abstract A sliding plug door mechanism is provided which has a pneumatic actuator for providing the sliding motion of the door, the barrel of the actuator being deflectable on initial energisation from the fully closed position of the door to provide a reaction force via suitable link means to unlock a locking device which is operable by virtue of a cam following member movable along a cam track for retaining the door in its plugged position when closed.
Description
This invention relates to sliding plug door mechanisms.
In the Specification of British Patent No. 1,478,314 there is described a plug-door mechanism for providing a door part with a sliding and plugging action with respect to a door frame part, said mechanism including carried by one said part fi.rst support track means for supporting the door part relative tD the frame part by means of a first track follower carried by a linkage pivotably supported by the other part, a second guide track carried by the one part for guiding movement relative to the one part of a second track follower also carried by the linkage at a point spaced from the first track follower, said linkage being pivotted to the other part adjacent the plugging edge of the door when closed and the tracks being so shaped that swinging movement of the linkage through a given angle is accompanied by unplugging motion of the door part prior to sliding motion relative to the frame part, said one part also having a third support track portion extending beyond the opposite edge of the door part to engage with a third track follower carried by the other part to cooperate with the first track follower and support track in supporting the door part in its travel towards its open position .
According to the present invention there is provided a mechanism for a sliding plug door including a swinging arm which is pivotted both in relation to the sliding plug door and to the mechanism, said swinging arm being operable to swing inwardly and outwardly relative to the mechanism to provide door plugging and door unplugging action respectively, an actuator having two ends between which a force is exertable to produce opening or closing movement of a door one said end being connected to a door carrying part and the other said end being substantially positioned at a reference position during actuation of the door between fully opened and fully closed positions, said other end being positioned at the reference position via mov-able means which is movably deflectable by the reaction between the door and the actuator on operation of the actuator to move the door into or out of the plugged state at the fully closed position, a locking device which cooperates with the swinging arm and which is operable by virtue of a guided member ~............................... ~ ~
movable along a predetermined track to retain the door in its plugged position, said -2a-~_.3~
~6~
locking device and said one end of the actuator being coupled via a link whereby said reaction acts respectively to engage or to release the locking device.
The mechanism may include a swinging support side arm which swings outwardly at the plugging edge of the door to unplug the door from the closed position and carry therewith a track which supports the door and which thereafter is slidable relative to the arm, the locking means compris-ing a link which when locked engages a cam surface substantially normal or over-normal to initial unplugging motion.
The cam surface may further have a part over which the linkage is driven also by said reaction following unlocking to exert an unplugging force on the door prior to sliding motion directly imparted by the actuator.
The link means may include a resilient member which can submit to a predetermined force tending to oppose movement of the door. In this case the resilient member may carry signalling means for signalling the existence of an obstruction to closing of the door.
In order that the invention may be more clearly understood and readily carried into effect, the same will be further described by way of example with reference to the accompanying drawings of which:-Figure 1 illustrates in diagrammatical schematic form a sliding plug door mechanism in accordance with a preferred embodiment of the invention, 6~
Fig. 2 illustrates diagrammatically a front view of part of the mechanism of Fig. 1, Fig. 3 illustrates a partial end view of such a nechanism showirg how it may be combined with a further such mechanism for operating a further door of a pair and, Fig. 4 illustrates a resiliently compressible link which may be employed in a modification of the mechanism.
Referring to Fig. 1, the arrangement shown in Fig. 1 is viewed from the underside when mounted for operation. The right-hand side of the drawing constitutes the outside of a rail vehicle and looking outward of the vehicle the arrangement shown is moun-ted in the doorway header such that the upper part of the drawing constitutes the top right-hand corner of the mechanism in the header. A small part of the vehicle body skin is denoted at 1 and the door pillar is represented partially a~ 2. The mechanism is slid upwardly into a space beneath the car cantrail and laterally retained by a flanged part 5 of the vertical doorway pillar such flahged part being clamped in the space provided between housing 4 and fixed bracket 6. The mechanism header beam of generally box section 4 is bolted through the inner angle flange 5 of the door pillar to a fixed bracket 6 which carries a cam slot 22 to be referred to later.
A swinging side arm is provided within the box section and this swinging arm is denoted by reference 8 and pivoted at a pivot spindle 9. The arm 8 provides a cantilevered support for the door supported or brackets such as 10 and 11, the former of which is ~ore readily seen in Fig. 2, these brackets bein~ -at~ache~ to a track tube 1, which is so constructed as to provide on the one hand a support track and on the other hand a guide track. The support track is thus provided by the inner upper surface of the tube within which a trolley supported pivotally at the point 15 on the swinging arm runs. The support track moreover ~s provided here by the slot 17 which runs longitudinally along the tube and changes direction typically through gO towards the end and in the door closed position as shown it engages a guide part in the form o~ a pin 18 on a protruding part of the swinging arm 8. An inner pivot of the swinging arm 8 denoted by reference 19 is coupled via an arcuate linkage 20 to a cam follower 21 which travels in a cam slot 22.
The slot 22 is of generally ~L~ shape and is formed in the fixed braoket 6. In the position shown, which is the fully closed and plugged position of the door, the follower 21 is in such a position thaJ. in the absence of an effort to withdraw it from the shown position at the end of the slot 22, it has no tendency to move outwardly under the effect of an effort attempting to open the door. This is by virtue of the curvature of the engaging surface 7 of the slot 22 at the position shown, being some~hat reduced as compared with the immedlately adjacent part of the surface, moving towards the middle of the slot 22, The follower 21 is coupled via link means in the 6~
form of a clevis 23, a further connecting rod 24 and clevis 25 to a reaction arm 26 which is pivotally mounted at the head of the doorway at fixed pivot 27, The reac-tion arm 26 carries the inner end of a double- ;
acting pneumatic piston-and-cylinder type of door actuator 28 the other end of which is supported by a swinging link 29 between suitable pivots permitting progressive alignment of the piston and cylinder actuator whilst supported but slidable in a slot 30 in the reaction arm. The piston rod 31 of the actuator is pivotally coupled to an arm 32 fixed to the track tube at a point which in the case of one of a pair of doors, is located at approximately the centre of the doorway header.
It is to be understood that the track tube 13 extends further than the width of a given single door and whilst not shown in its entirety, the extended part is denoted diagrammatically at 33 and is seen to be carried at an inner point which again is approximately at the door opening centre, by load bearing concave rollers denoted diagrammatically as 34. The tube is moreover provided with a double bend after which the extended track tube is sub~tantially parallel to the remaining part. As will be seen, the double bend provides for the requisite unplugging nlotion for the meeting edge of the door and the portion 35 of the tube which extends beyond the bend is carried in rollers 34 to combine with the trolley at 15 in providing steadying support of the door as it moves to its open position.
The mechanism is additionally provided with a 8~) manual unlocking member 36 pivotally mounted at a pivot point 37 on the bracket 6. Whilst not shown moreover means is provided for actuating the member 36 by exerting a force thereon in the direction of the arrow 38, This means may comprise any suitable manual means via, for example, a "Bowden" cable.
Whilst, in the foregoing, the description so far has referred only to the sliding plug door mechanism by which a door is supported at the head of the doorway, it is desirable to provide at the lower edge of the door or at some intermediate point whereby the door is supported against outward or inward motion of the lower edge of the door except for motion thereof corresponding to the upper edge. This may preferably comprise a further swinging arm linkage such as described in the Specification of Canadian Patent 1 05~ 273 and for the purpo~e of operating this, the arm 8 is keyed to the shaft at the pivot point 9 and this is coupled via a suitable .. . . . .. .. . .
clamping device 41 as shown in Fig. 2 or Fig. 3 to a torque rod 42 which extends parallel to the pillar of the doorway to operate the further linkage, mounted beneath the threshold of the doorway, in unison with the operation of the arm 8.
Whilst, moreover, no mention has been made in the foregoing of the manner by which the door shall be mounted to the sliding plug door mechanism described above, the mounting bracket such as 10 and 11 are preferably so shaped as to accommodate a door mounting means such as that which is more /
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specifically described in the Specification of Belgian ~atent Number 849~248. This mounting will therefore not be further described herein.
Referring now briefly to Fig. 3, this illustrates the way in which by utilising identical parts to those included in the snechanism of Fig. 1, but by mounting the actuator inverted relative to the actuator of Fig. 1 and mounting the further swinging arm inverted relative to the swinging arm 8 of Fig. 1, a compact form of combined mechanism for operating a pair of doors is readily achieved.
Referring to the operation of the mechanism, reference will again be made to Fig. 1 and it will be seen that by applying air pressure to the actuator 1~ 28 such as to tend to expand the actuator in the sense of the arrows 39, the rod 31 exerts a force on the door tending to move it even more tightly towards the door pillar in its plugging condition and such force can only, (by virtue of the pro~ected line of thrust of the actuator 28 and the configuration of the relative positions of the pivots 9 and 18) affords little effective turning movement about pivot 9, The reaction of the actuator however to this force results in a motion of the reaction arm 26, terding to move the link means rod 24 and the cam surface follower 21 towards the intermediate parts of the cam slow 22 in the bracket 6. The cam follower 21 thus is moved from its stable position towards the curved part of the cam slot 22, correspondingly swinging the linkage 20 out of its locking position. ~s the follower 21 reaches the outer curved cam part of the slot 22, the result is a substantial unplugging force transmitted by the reaction of the actuator through the rod 24, the :follower 21 and the linkage 20 to the swlnging arm 8 which thereby is moved outwardly about the axis of 9.
This means that the supporting point 15 also is moved outwardly and carries therewith the track tube 13 as constrained to outward movement by the guide follower 18 in the groove 17 of the track. As soon as this has happened, the force acting through the rod 31 is translated slightly outwards and the arm 32 and the tube 13 can transmit an additional unplugging action by virtue of the reaction at the follower 18 so that the door unplugs as the guide 18 runs round the slot 17 in the track tube 13. With the guide 18 and the support trolley at 15 aligned wlthin the track, the 'I
tube continues to move in its unplugged condition, with a sliding motion towards its fully open position.
During this motion, there is compensating pivoting of the arm 26 about the pivot 27 and a degree of lateral motion of the inward end of the cylinder as accommodated by the latter being supported by a roller 40 in a slot 30 in the arm 26.
During unplugging, the double bend in the track tube referred to above is such that, on passing through the support rollers 34 it imparts an unplugging and outward translating motion to the other or meeting - edge of the door and the latter continues to be supported by the extension of the tube ~3 beyond thè rollers 34, it being understood that the tube 13 is constructed with _ 9 X`
~6~
efficient rigidity to prevent appreciable flexing.
Closing of the door is achieved by reverse operation of the piston and cylinder actuator and it will be seen that cn approaching the plugging condition, tie reactive force which is exerted via the rod 24 from the reaction arm 26, is in the reverse direction such as to drive the follower 21 around the inner curved surface 7 of the cam slot 22 into the locking position for the link 20.
In the event of a failure of the air supply, it may be desireable that the mechanism may be released from its locked condition as shown by some manual means.
It is for this reason that the part, referred to above as 36, is provided, operation of which by a force, as indicated by the arrow 38, causes deflection of the follower 21 from the end position of the slot in which it is shown towards the curved part of the slot 22 in the bracket 6, whereafter manual opening effort exerted on the door itself will enable the door to be slid from its fully closed position towards its fully open position.
For the purposes of facilitating the setting-up of doors mounted in a doorway on..a sliding and plugging door mechanism according to the above description, the pivot 19 may incorporate an eccentric bearing such that, oy means of a suitable tool for rotational adjustment of 9, the mechanism can be set a small distance inward or outward of the doorway in precise fashion.
Further, a feature of the apparatus described is that by assembling the parts in some cases such as the swinging arm 8, the reaction arm 26 and the s~inging _ 10 _ ~., link 29, inverted, the same parts can be assembled to produce a left or right handed mechanism and duplicate handed parts need not be produced.
In the above description, the link means is desc.ibed as a rod 24 connected between devices 23 and 25 but in a modification a "pushback" facility may be provided in the mechanism by replacing the rod 24 by a telescopically compressible link which is normally held fully extended by a spring of sufficiently large rating. The spring may be compressed by a sufficiently substantial obstructive force acting against the door in a partially closed position through components 32, ~1 and 26, The compressible link may additionally be provided with a signalling device such as a micro-switch to signal the existence of such an obstruction, One such compressible link is shown diagrammatically in Fig. 4. Or.e part 51 of the link is slidable inside the other part 52, the amount of movement being determined by a slot in the outer part 52 and peg 54 engeging therein. The part 52 carries a threaded sleeve 55 and a locking ring 56 by which sleeve the force exerted by a spring 57 is adjustable to a desired magnitude to urge the link towards its fullest length. The part 52 also carries a cam member 58 which in the compressed condition of the link operates in conjuntion with a micro-switch 59 carried by the part 51 to comprise a signalling means to signal the existence of an obstruction to closing motion of the door.
.
By virtue of th~ arrangement of the inter-rela+ionship of the point of action of the actuator 28 in the slot 30 formed in the lever plate 26, the link 24 and the bracket arm 32, with the door mechanism plugged as shown, maximum mechanical advantage is present between the actuator reaction force and the link means 23, 24 and 25 to effect unlocking and unplugging as described. ~en the door moves away from the plugging position the possible reaction force through 24 initally becomes less owing to the nose of the actuator cylinder 28 moving ne~rer the fulcrum pivot 27. After a certain distance, the nose of 28 moves out again to make the arrangement the more sensitive again to obstruction by a person liable to be trapped by the door.
Whilst the advantage stated in the previous paragraph is readily obtainable in a mechanism using the invention, the feature afforded by the presence of the cam slot ~0 may, if desired, be dispensed with whilst still retaining the locking and ur.locking feature afforded by the cam slot 22. In such a case, the actuator 28 may simply be suitable movably suppo-ted.
_ 12 -.
~, .
In the Specification of British Patent No. 1,478,314 there is described a plug-door mechanism for providing a door part with a sliding and plugging action with respect to a door frame part, said mechanism including carried by one said part fi.rst support track means for supporting the door part relative tD the frame part by means of a first track follower carried by a linkage pivotably supported by the other part, a second guide track carried by the one part for guiding movement relative to the one part of a second track follower also carried by the linkage at a point spaced from the first track follower, said linkage being pivotted to the other part adjacent the plugging edge of the door when closed and the tracks being so shaped that swinging movement of the linkage through a given angle is accompanied by unplugging motion of the door part prior to sliding motion relative to the frame part, said one part also having a third support track portion extending beyond the opposite edge of the door part to engage with a third track follower carried by the other part to cooperate with the first track follower and support track in supporting the door part in its travel towards its open position .
According to the present invention there is provided a mechanism for a sliding plug door including a swinging arm which is pivotted both in relation to the sliding plug door and to the mechanism, said swinging arm being operable to swing inwardly and outwardly relative to the mechanism to provide door plugging and door unplugging action respectively, an actuator having two ends between which a force is exertable to produce opening or closing movement of a door one said end being connected to a door carrying part and the other said end being substantially positioned at a reference position during actuation of the door between fully opened and fully closed positions, said other end being positioned at the reference position via mov-able means which is movably deflectable by the reaction between the door and the actuator on operation of the actuator to move the door into or out of the plugged state at the fully closed position, a locking device which cooperates with the swinging arm and which is operable by virtue of a guided member ~............................... ~ ~
movable along a predetermined track to retain the door in its plugged position, said -2a-~_.3~
~6~
locking device and said one end of the actuator being coupled via a link whereby said reaction acts respectively to engage or to release the locking device.
The mechanism may include a swinging support side arm which swings outwardly at the plugging edge of the door to unplug the door from the closed position and carry therewith a track which supports the door and which thereafter is slidable relative to the arm, the locking means compris-ing a link which when locked engages a cam surface substantially normal or over-normal to initial unplugging motion.
The cam surface may further have a part over which the linkage is driven also by said reaction following unlocking to exert an unplugging force on the door prior to sliding motion directly imparted by the actuator.
The link means may include a resilient member which can submit to a predetermined force tending to oppose movement of the door. In this case the resilient member may carry signalling means for signalling the existence of an obstruction to closing of the door.
In order that the invention may be more clearly understood and readily carried into effect, the same will be further described by way of example with reference to the accompanying drawings of which:-Figure 1 illustrates in diagrammatical schematic form a sliding plug door mechanism in accordance with a preferred embodiment of the invention, 6~
Fig. 2 illustrates diagrammatically a front view of part of the mechanism of Fig. 1, Fig. 3 illustrates a partial end view of such a nechanism showirg how it may be combined with a further such mechanism for operating a further door of a pair and, Fig. 4 illustrates a resiliently compressible link which may be employed in a modification of the mechanism.
Referring to Fig. 1, the arrangement shown in Fig. 1 is viewed from the underside when mounted for operation. The right-hand side of the drawing constitutes the outside of a rail vehicle and looking outward of the vehicle the arrangement shown is moun-ted in the doorway header such that the upper part of the drawing constitutes the top right-hand corner of the mechanism in the header. A small part of the vehicle body skin is denoted at 1 and the door pillar is represented partially a~ 2. The mechanism is slid upwardly into a space beneath the car cantrail and laterally retained by a flanged part 5 of the vertical doorway pillar such flahged part being clamped in the space provided between housing 4 and fixed bracket 6. The mechanism header beam of generally box section 4 is bolted through the inner angle flange 5 of the door pillar to a fixed bracket 6 which carries a cam slot 22 to be referred to later.
A swinging side arm is provided within the box section and this swinging arm is denoted by reference 8 and pivoted at a pivot spindle 9. The arm 8 provides a cantilevered support for the door supported or brackets such as 10 and 11, the former of which is ~ore readily seen in Fig. 2, these brackets bein~ -at~ache~ to a track tube 1, which is so constructed as to provide on the one hand a support track and on the other hand a guide track. The support track is thus provided by the inner upper surface of the tube within which a trolley supported pivotally at the point 15 on the swinging arm runs. The support track moreover ~s provided here by the slot 17 which runs longitudinally along the tube and changes direction typically through gO towards the end and in the door closed position as shown it engages a guide part in the form o~ a pin 18 on a protruding part of the swinging arm 8. An inner pivot of the swinging arm 8 denoted by reference 19 is coupled via an arcuate linkage 20 to a cam follower 21 which travels in a cam slot 22.
The slot 22 is of generally ~L~ shape and is formed in the fixed braoket 6. In the position shown, which is the fully closed and plugged position of the door, the follower 21 is in such a position thaJ. in the absence of an effort to withdraw it from the shown position at the end of the slot 22, it has no tendency to move outwardly under the effect of an effort attempting to open the door. This is by virtue of the curvature of the engaging surface 7 of the slot 22 at the position shown, being some~hat reduced as compared with the immedlately adjacent part of the surface, moving towards the middle of the slot 22, The follower 21 is coupled via link means in the 6~
form of a clevis 23, a further connecting rod 24 and clevis 25 to a reaction arm 26 which is pivotally mounted at the head of the doorway at fixed pivot 27, The reac-tion arm 26 carries the inner end of a double- ;
acting pneumatic piston-and-cylinder type of door actuator 28 the other end of which is supported by a swinging link 29 between suitable pivots permitting progressive alignment of the piston and cylinder actuator whilst supported but slidable in a slot 30 in the reaction arm. The piston rod 31 of the actuator is pivotally coupled to an arm 32 fixed to the track tube at a point which in the case of one of a pair of doors, is located at approximately the centre of the doorway header.
It is to be understood that the track tube 13 extends further than the width of a given single door and whilst not shown in its entirety, the extended part is denoted diagrammatically at 33 and is seen to be carried at an inner point which again is approximately at the door opening centre, by load bearing concave rollers denoted diagrammatically as 34. The tube is moreover provided with a double bend after which the extended track tube is sub~tantially parallel to the remaining part. As will be seen, the double bend provides for the requisite unplugging nlotion for the meeting edge of the door and the portion 35 of the tube which extends beyond the bend is carried in rollers 34 to combine with the trolley at 15 in providing steadying support of the door as it moves to its open position.
The mechanism is additionally provided with a 8~) manual unlocking member 36 pivotally mounted at a pivot point 37 on the bracket 6. Whilst not shown moreover means is provided for actuating the member 36 by exerting a force thereon in the direction of the arrow 38, This means may comprise any suitable manual means via, for example, a "Bowden" cable.
Whilst, in the foregoing, the description so far has referred only to the sliding plug door mechanism by which a door is supported at the head of the doorway, it is desirable to provide at the lower edge of the door or at some intermediate point whereby the door is supported against outward or inward motion of the lower edge of the door except for motion thereof corresponding to the upper edge. This may preferably comprise a further swinging arm linkage such as described in the Specification of Canadian Patent 1 05~ 273 and for the purpo~e of operating this, the arm 8 is keyed to the shaft at the pivot point 9 and this is coupled via a suitable .. . . . .. .. . .
clamping device 41 as shown in Fig. 2 or Fig. 3 to a torque rod 42 which extends parallel to the pillar of the doorway to operate the further linkage, mounted beneath the threshold of the doorway, in unison with the operation of the arm 8.
Whilst, moreover, no mention has been made in the foregoing of the manner by which the door shall be mounted to the sliding plug door mechanism described above, the mounting bracket such as 10 and 11 are preferably so shaped as to accommodate a door mounting means such as that which is more /
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specifically described in the Specification of Belgian ~atent Number 849~248. This mounting will therefore not be further described herein.
Referring now briefly to Fig. 3, this illustrates the way in which by utilising identical parts to those included in the snechanism of Fig. 1, but by mounting the actuator inverted relative to the actuator of Fig. 1 and mounting the further swinging arm inverted relative to the swinging arm 8 of Fig. 1, a compact form of combined mechanism for operating a pair of doors is readily achieved.
Referring to the operation of the mechanism, reference will again be made to Fig. 1 and it will be seen that by applying air pressure to the actuator 1~ 28 such as to tend to expand the actuator in the sense of the arrows 39, the rod 31 exerts a force on the door tending to move it even more tightly towards the door pillar in its plugging condition and such force can only, (by virtue of the pro~ected line of thrust of the actuator 28 and the configuration of the relative positions of the pivots 9 and 18) affords little effective turning movement about pivot 9, The reaction of the actuator however to this force results in a motion of the reaction arm 26, terding to move the link means rod 24 and the cam surface follower 21 towards the intermediate parts of the cam slow 22 in the bracket 6. The cam follower 21 thus is moved from its stable position towards the curved part of the cam slot 22, correspondingly swinging the linkage 20 out of its locking position. ~s the follower 21 reaches the outer curved cam part of the slot 22, the result is a substantial unplugging force transmitted by the reaction of the actuator through the rod 24, the :follower 21 and the linkage 20 to the swlnging arm 8 which thereby is moved outwardly about the axis of 9.
This means that the supporting point 15 also is moved outwardly and carries therewith the track tube 13 as constrained to outward movement by the guide follower 18 in the groove 17 of the track. As soon as this has happened, the force acting through the rod 31 is translated slightly outwards and the arm 32 and the tube 13 can transmit an additional unplugging action by virtue of the reaction at the follower 18 so that the door unplugs as the guide 18 runs round the slot 17 in the track tube 13. With the guide 18 and the support trolley at 15 aligned wlthin the track, the 'I
tube continues to move in its unplugged condition, with a sliding motion towards its fully open position.
During this motion, there is compensating pivoting of the arm 26 about the pivot 27 and a degree of lateral motion of the inward end of the cylinder as accommodated by the latter being supported by a roller 40 in a slot 30 in the arm 26.
During unplugging, the double bend in the track tube referred to above is such that, on passing through the support rollers 34 it imparts an unplugging and outward translating motion to the other or meeting - edge of the door and the latter continues to be supported by the extension of the tube ~3 beyond thè rollers 34, it being understood that the tube 13 is constructed with _ 9 X`
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efficient rigidity to prevent appreciable flexing.
Closing of the door is achieved by reverse operation of the piston and cylinder actuator and it will be seen that cn approaching the plugging condition, tie reactive force which is exerted via the rod 24 from the reaction arm 26, is in the reverse direction such as to drive the follower 21 around the inner curved surface 7 of the cam slot 22 into the locking position for the link 20.
In the event of a failure of the air supply, it may be desireable that the mechanism may be released from its locked condition as shown by some manual means.
It is for this reason that the part, referred to above as 36, is provided, operation of which by a force, as indicated by the arrow 38, causes deflection of the follower 21 from the end position of the slot in which it is shown towards the curved part of the slot 22 in the bracket 6, whereafter manual opening effort exerted on the door itself will enable the door to be slid from its fully closed position towards its fully open position.
For the purposes of facilitating the setting-up of doors mounted in a doorway on..a sliding and plugging door mechanism according to the above description, the pivot 19 may incorporate an eccentric bearing such that, oy means of a suitable tool for rotational adjustment of 9, the mechanism can be set a small distance inward or outward of the doorway in precise fashion.
Further, a feature of the apparatus described is that by assembling the parts in some cases such as the swinging arm 8, the reaction arm 26 and the s~inging _ 10 _ ~., link 29, inverted, the same parts can be assembled to produce a left or right handed mechanism and duplicate handed parts need not be produced.
In the above description, the link means is desc.ibed as a rod 24 connected between devices 23 and 25 but in a modification a "pushback" facility may be provided in the mechanism by replacing the rod 24 by a telescopically compressible link which is normally held fully extended by a spring of sufficiently large rating. The spring may be compressed by a sufficiently substantial obstructive force acting against the door in a partially closed position through components 32, ~1 and 26, The compressible link may additionally be provided with a signalling device such as a micro-switch to signal the existence of such an obstruction, One such compressible link is shown diagrammatically in Fig. 4. Or.e part 51 of the link is slidable inside the other part 52, the amount of movement being determined by a slot in the outer part 52 and peg 54 engeging therein. The part 52 carries a threaded sleeve 55 and a locking ring 56 by which sleeve the force exerted by a spring 57 is adjustable to a desired magnitude to urge the link towards its fullest length. The part 52 also carries a cam member 58 which in the compressed condition of the link operates in conjuntion with a micro-switch 59 carried by the part 51 to comprise a signalling means to signal the existence of an obstruction to closing motion of the door.
.
By virtue of th~ arrangement of the inter-rela+ionship of the point of action of the actuator 28 in the slot 30 formed in the lever plate 26, the link 24 and the bracket arm 32, with the door mechanism plugged as shown, maximum mechanical advantage is present between the actuator reaction force and the link means 23, 24 and 25 to effect unlocking and unplugging as described. ~en the door moves away from the plugging position the possible reaction force through 24 initally becomes less owing to the nose of the actuator cylinder 28 moving ne~rer the fulcrum pivot 27. After a certain distance, the nose of 28 moves out again to make the arrangement the more sensitive again to obstruction by a person liable to be trapped by the door.
Whilst the advantage stated in the previous paragraph is readily obtainable in a mechanism using the invention, the feature afforded by the presence of the cam slot ~0 may, if desired, be dispensed with whilst still retaining the locking and ur.locking feature afforded by the cam slot 22. In such a case, the actuator 28 may simply be suitable movably suppo-ted.
_ 12 -.
~, .
Claims (8)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A mechanism for a sliding plug door including a swinging arm which is pivoted both in relation to the sliding plug door and to the mechanism, said swinging arm being operable to swing inwardly and outwardly relative to the mechanism to provide door plugging and door unplugging action respectively, an actuator having two ends between which a force is exertable to produce opening or closing movement of a door one said end being connected to a door carrying part and the other said end being substantially positioned at a reference position during actuation of the door between fully opened and fully closed positions, said other end being positioned at the reference position via movable means which is movably deflectable by the reaction between the door and the actuator on operation of the actuator to move the door into or out of the plugged state at the fully closed position, a locking device which cooperates with the swinging arm and which is operable by virtue of a guided member movable along a predetermined track to retain the door in its plugged position, said locking device and said one end of the actuator being coupled via a link whereby said reaction acts respectively to engage or to release the locking device.
2. A sliding plug door mechanism as claimed in claim 1, the door locking device including a linkage, a cam member surface by means of which a cam follower coupled to said linkage and the link causes said reaction to be translated into a substantial unplugging force for assisting unplugging of the door by the mechanism.
3. A sliding plug door mechanism as claimed in claim 2, the cam member surface being such as to cause an opposite reaction during plugging to assist final plugging of the door by the mechanism on closing the door.
4. A sliding plug door mechanism as claimed in claim 3, the swinging arm having two spaced additional pivot points engaging track means, one of said pivot points being constrained to move around a curved part of track means by which a door is carried to produce the plugging motion.
5. A sliding and plug door mechanism as claimed in claim 4, the track means extending beyond the door to be slidably supported by a further support means for supporting the door in and moving towards the open position.
6. A sliding and plugging door mechanism as claimed in claim 5, the linkage being connected to said swinging arm.
7. A sliding and plugging door mechanism as claimed in claim 6, the actuator being supported by a lever, the mechanical advantage of which, coupled to the said link means, varies dependent upon the position of the door.
8. A sliding and plugging door mechanism as claimed in claim 1, 2 or 3, the link means including means resiliently operable to indicate door obstruction or to permit push-back during closing of the door.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB52281/75 | 1975-12-20 | ||
| GB52281/75A GB1548929A (en) | 1975-12-20 | 1975-12-20 | Sliding plug door mechanisms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1106860A true CA1106860A (en) | 1981-08-11 |
Family
ID=10463328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA267,378A Expired CA1106860A (en) | 1975-12-20 | 1976-12-08 | Sliding plug door mechanisms |
Country Status (9)
| Country | Link |
|---|---|
| AU (1) | AU506266B2 (en) |
| BE (1) | BE849247A (en) |
| CA (1) | CA1106860A (en) |
| CH (1) | CH618493A5 (en) |
| FR (1) | FR2335679A1 (en) |
| GB (1) | GB1548929A (en) |
| IT (1) | IT1072239B (en) |
| SE (1) | SE434243B (en) |
| ZA (1) | ZA767127B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2128247B (en) * | 1982-09-28 | 1986-04-03 | Peters Plc Ltd | Door arrangement |
| DE3415645A1 (en) * | 1984-04-27 | 1985-10-31 | Gebr. Bode & Co GmbH, 3500 Kassel | Adjusting device for the opening and closing movement of a door wing of a vehicle door, especially for rail vehicles |
| NL9002885A (en) * | 1990-12-28 | 1992-07-16 | Tebel Pneumatiek Bv | DOOR SYSTEM OF THE SLIDING TYPE FOR USE IN A VEHICLE. |
| DE19516876C1 (en) * | 1995-05-09 | 1996-11-28 | Daimler Benz Ag | Drive arrangement for moving a lockable vehicle part |
| FR2762278B1 (en) * | 1997-04-18 | 1999-06-11 | Faiveley Transport | CONJUGATION DEVICE FOR A LOCKING-SLIDING FLAP DOOR, DOOR AND VEHICLE, FOR EXAMPLE RAILWAY, EQUIPPED WITH SUCH A DEVICE |
| JP6356555B2 (en) | 2014-09-19 | 2018-07-11 | ナブテスコ株式会社 | Plug door opening and closing device and plug door device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1176690B (en) * | 1961-12-06 | 1964-08-27 | Uerdingen Ag Waggonfabrik | Covered freight wagon with sliding wall parts lying on one level when closed |
| DE1811400C3 (en) * | 1968-11-28 | 1974-03-07 | Wegmann & Co, 3500 Kassel | Device for multi-leaf doors, especially for doors with two hinged leaves |
| FR2044894A5 (en) * | 1969-05-12 | 1971-02-26 | Bode & Co Geb | |
| FR2096901B1 (en) * | 1970-07-15 | 1976-05-28 | Bode & Co Geb | |
| FR2133309A5 (en) * | 1971-04-16 | 1972-11-24 | Faiveley Sa | |
| DE2220701A1 (en) * | 1972-04-27 | 1973-11-08 | Bode & Co Vorm Wegmann & Co | EXTERNAL SLIDING DOOR FOR VEHICLES |
| FR2233479A1 (en) * | 1973-06-14 | 1975-01-10 | Westinghouse Brake & Signal | Sliding and rotating door mechanism for vehicles - has guide rails and combined mechanism for sliding and rotation |
-
1975
- 1975-12-20 GB GB52281/75A patent/GB1548929A/en not_active Expired
-
1976
- 1976-11-29 ZA ZA767127A patent/ZA767127B/en unknown
- 1976-12-08 CA CA267,378A patent/CA1106860A/en not_active Expired
- 1976-12-09 BE BE173124A patent/BE849247A/en not_active IP Right Cessation
- 1976-12-09 AU AU20415/76A patent/AU506266B2/en not_active Expired
- 1976-12-16 IT IT70003/76A patent/IT1072239B/en active
- 1976-12-16 FR FR7637877A patent/FR2335679A1/en active Granted
- 1976-12-17 SE SE7614209A patent/SE434243B/en unknown
- 1976-12-17 CH CH1594076A patent/CH618493A5/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB1548929A (en) | 1979-07-18 |
| BE849247A (en) | 1977-04-01 |
| IT1072239B (en) | 1985-04-10 |
| FR2335679B1 (en) | 1980-03-21 |
| CH618493A5 (en) | 1980-07-31 |
| ZA767127B (en) | 1977-10-26 |
| AU506266B2 (en) | 1979-12-20 |
| FR2335679A1 (en) | 1977-07-15 |
| AU2041576A (en) | 1978-06-15 |
| SE7614209L (en) | 1977-06-21 |
| SE434243B (en) | 1984-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |