EP2447130B1 - Door switch for railroad vehicle, and door opening/closing device adapted for use in railroad vehicle and provided with the door switch - Google Patents
Door switch for railroad vehicle, and door opening/closing device adapted for use in railroad vehicle and provided with the door switch Download PDFInfo
- Publication number
- EP2447130B1 EP2447130B1 EP10791941.7A EP10791941A EP2447130B1 EP 2447130 B1 EP2447130 B1 EP 2447130B1 EP 10791941 A EP10791941 A EP 10791941A EP 2447130 B1 EP2447130 B1 EP 2447130B1
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- EP
- European Patent Office
- Prior art keywords
- doors
- passive component
- door
- component
- switch
- 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.)
- Not-in-force
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D19/00—Door arrangements specially adapted for rail vehicles
- B61D19/02—Door arrangements specially adapted for rail vehicles for carriages
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- 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
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2400/00—Electronic control; Power supply; Power or signal transmission; User interfaces
- E05Y2400/10—Electronic control
- E05Y2400/30—Electronic control of motors
- E05Y2400/32—Position control, detection or monitoring
- E05Y2400/35—Position control, detection or monitoring related to specific positions
- E05Y2400/354—End positions
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2400/00—Electronic control; Power supply; Power or signal transmission; User interfaces
- E05Y2400/10—Electronic control
- E05Y2400/50—Fault detection
- E05Y2400/51—Fault detection of position, of back drive
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- 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
Definitions
- the present invention relates to an assembly comprising double doors for a railroad vehicle and a door switch, which detects that double doors have been closed.
- Patent Document 1 recites a known opening/closing device for double doors.
- This door opening/closing device is provided with a door closing switch substantially at the center of a base plate which is fixed to the vehicle main body.
- a switch operating metal part of a hanging metal part of one door contacts the door closing switch, and the switch detects that the double doors are closed.
- a solenoid or the like is excited by a signal from the door closing switch, with the result that a locking shaft is engaged with a locking unit so as to lock the doors.
- Document JP 51 074903 discloses a door switch including the features of the preamble of appended claim 1.
- Documents JP 9 301158 and JP 43 024933 discloses other types of door switches.
- Patent Document 1 Japanese Unexamined Patent Publication No. 2002-309849
- the door opening/closing device above is arranged to operate so that the double doors are opened and closed by mechanically interlocking with each other. Therefore, when one of the double doors is at the full-closed position, the other door is usually at the full-closed position, too. It is therefore possible to determine, by using the door closing switch above, whether both of the double doors are at the full-closed positions.
- a conceivable solution to the problem above is to provide two door closing switches each arranged as above, to correspond to the respective doors.
- This approach requires another switch, and the increase in the number of electrical components may result in the increase in the failure rate of the entire system. Furthermore, the increase in the number of components results in the increase in the cost.
- Another conceivable solution to the problem above is to attach the door closing switch to one door instead of fixing it to the vehicle body, and the switch is operated by the other door. In this approach, however, since the wires of the door closing switch are moved for a long distance to the same degree as the opening/closing stroke, when the door is opened or closed, the wires are susceptible to disconnection and hence it is difficult to certainly detect whether the double doors are at the full-closed positions. Furthermore, since the wires are required to have high durability, cost increase is expected.
- An object of the present invention in consideration of the problem above is to provide a door switch for a railroad vehicle, which can reliably detect whether double doors are at full-closed positions without needing another switch, and to provide a door opening/closing device for a railroad vehicle equipped with the door switch.
- an assembly includes the features of appended claim 1 and notably: a first passive component which is arranged to be movable relative to a vehicle main body and is biased when one of the doors moves toward a full-closed position; a second passive component which is arranged to be movable relative to the vehicle main body and the first passive component and is biased when the other one of the doors is moves toward a full-closed position; a detection unit which outputs a detection signal when the first passive component and the second passive component take predetermined relative positions; a biasing member which biases the first passive component and the second passive component to prevent the first passive component and the second passive component from taking the predetermined relative positions; the predetermined relative positions being relative positions of the first passive component and the second passive component when the first passive component and the second passive component are biased by the double doors against a biasing force of the biasing member and both of the double doors eventually reach the full-closed positions.
- the biasing force of the biasing member prevents the first passive component and the second passive component from taking the predetermined relative positions, and hence no detection signal is output from the detection unit.
- the first passive component and the second passive component are arranged to be movable in opening/closing directions of the doors, with respect to the vehicle main body.
- the door switch further includes: a limit switch including the first passive component, the second passive component movably support the first passive component, an elastic component provided between the first passive component and the second passive component and functioning as the biasing component, and the detection unit which outputs the detection signal when the first passive component moves for a predetermined distance with respect to the second passive component against an elastic force of the elastic component, the limit switch being arranged to be movable with respect to the vehicle main body in directions in parallel to a direction of movement of the first passive component with respect to the second passive component, and as one of the doors biases the first passive component and the other one of the doors biases the second passive component, the first passive component moving with respect to the second passive component against the elastic force of the elastic component, and a moving distance of the first passive component with respect to the second passive component being equal to the predetermined distance when both of the doors reach the full-closed positions.
- a limit switch including the first passive component, the second passive component movably support the first passive component, an elastic component provided between the first passive component and the second passive
- the first passive component and the second passive component are rotatable about a rotation axis which is fixed to the vehicle main body, and the rotation axis extends in directions orthogonal to the flat plate-shaped doors.
- the detection unit outputs the detection signal when the first detection unit attached to the first passive component and the second detection unit attached to the second passive component take a predetermined positional relationship, the first detection unit is provided at a position further from the rotation axis of the first passive component than a position at which the first passive component is biased by said one of the doors, and the second detection unit is provided at a position further from the rotation axis of the second passive component than a position at which the second passive component is biased by the other one of the doors.
- the degree of change in the relative positions of the first detection unit and the second detection unit is great.
- a door opening/closing device for a railroad vehicle which is used for opening and closing double doors, includes: the door switch according to claim 1 or 2; and a control unit which receives the detection signal output from the detection unit, the control unit driving a locking unit for locking the doors or controlling a drive output for opening and closing the doors, based on the detection signal.
- the assembly of the present invention and the door opening/closing device for the railroad vehicle equipped with the assembly make it possible to certainly detect whether the double doors are at the full-closed positions, without needing another switch.
- Fig. 1 is a general view of an assembly according to an embodiment of the present invention.
- the door opening/closing device 1 is fixed to a side wall of the main body of a railroad vehicle via a base plate 2.
- the door opening/closing device 1 opens and closes a pair of double doors (door 100a and door 100b) by using a rack-and-pinion mechanism.
- the doors 100a and 100b are flat plate-shaped doors arranged to fully cover an entrance made through a side wall of the main body of the railroad vehicle, when the doors are at the full-closed state.
- the rack-and-pinion mechanism is arranged to include a pair of racks 3a and 3b extending along the front-back directions of the vehicle and an unillustrated pinion engaged with the respective racks 3a and 3b.
- the door opening/closing device 1 includes an unillustrated direct-drive electric motor which can rotated both forward and backward and is fixed to the vehicle main body and a planetary gear mechanism 4 which transfers the rotation of the electric motor to the rack-and-pinion mechanism. As the electric motor is driven, the pinion is rotated via the planetary gear mechanism 4 and the pair of racks 3a and 3b engaged with the pinion are moved in opposite directions.
- the pair of racks 3a and 3b are connected to the door 100a and the door 100b, respectively, via a connecting mechanism.
- the connecting mechanism includes rack-side brackets 5a and 5b fixed to the leading ends of the respective racks 3a and 3b, rail components 6a and 6b fixed to the respective rack-side brackets 5a and 5b, and door-hanging brackets 7a and 7b fixed to the respective rail components 6a and 6b.
- the rail components 6a and 6b are guided in directions in parallel to the movement directions of the rack-side brackets 5a and 5b, by guide rails 8a and 8b which are fixed to the vehicle main body.
- Each of the door-hanging brackets 7a and 7b is fixed to the door 100a or 100b at two parts of the upper end portion.
- the electric motor of the door opening/closing device 1 rotates the pinion in one direction so that the rack 3b moves toward the front of the vehicle (i.e., to the right in Fig. 1 and Fig. 2 ), with the result that the door 100b moves toward the front of the vehicle.
- the rack 3a moves toward the rear of the vehicle (i.e., to the left in Fig. 1 and Fig. 2 ), and hence the door 100a moves rearward.
- the electric motor of the door opening/closing device 1 rotates the pinion in said one direction
- the door 100a and the door 100b simultaneously move in the opening directions (indicated by the arrows X1 in Fig. 1 and Fig. 2 ).
- the door opening/closing device 1 carries out the opening and closing operations of the door 100a and the door 100b.
- the doors may not be opened and closed by using the rack-and-pinion mechanism.
- the opening/closing of the doors may be carried out by connecting an electric motor with doors by a belt, may be carried out by using ball screws, may be carried out by using a linear motor, or may be carried out by using fluid such as air or oil.
- the door opening/closing device 1 is provided with a door switch 10 which can detect whether both of the door 100a and the door 100b are completely closed.
- the door switch 10 is provided at an upper part of the central portion of the entrance in the vehicle front-back directions (i.e., below the planetary gear mechanism 4), via a base plate 9. That is to say, the door switch 10 is arranged to locate above the anterior door ends of the respective doors 100a and 100b at the full-closed positions.
- Fig. 2 is an enlarged view of the door switch 10 and its surroundings of the door opening/closing device 1 shown in Fig. 1 .
- Fig. 3 shows the door switch 10 of Fig. 2 when the vehicle is viewed from the front (i.e., from the bush 35 side) in the direction in parallel to the opening/closing directions of the doors 100a and 100b.
- Fig. 4(a) shows the door switch 10 when viewed from the opposite side of the base plate 9.
- a part of a main body casing 21 of a limit switch 20 is omitted to show the internal structure of the limit switch 20.
- Fig. 4(b) shows the door switch 10 of Fig. 4(a) when viewed in the direction indicated by the arrow A.
- the door switch 10 includes a limit switch 20 and a box-shaped switch casing 30 housing the limit switch 20 therein.
- the switch casing 30 is fixed to the base plate 9 via the rail 40.
- the rail 40 is fixed to the base plate 9 to extend in parallel to the opening/closing directions of the doors 100a and 100b.
- a guide component 32 is fixed to be engaged with the rail 40.
- This guide component 32 is movable along the sliding rail 40 when engaged with the sliding rail 40.
- the switch casing 30 can therefore move in parallel to the opening/closing directions of the doors 100a and 100b, along the rail 40.
- the side of the switch casing 30 opposite to the bottom plate 31 is arranged to be open for the sake of easy maintenance of the limit switch 20.
- the limit switch 20 includes a main body casing 21 which can house a detection mechanism therein and a rod 22 which protrudes from the main body casing 21.
- the rod 22 is supported by the main body casing 21 such that the leading end side and the base end side of the rod 22 are inserted respectively to through holes 21a and 21b made through the main body casing 21 and hence the rod 22 is movable in the axial directions with respect to the main body casing 21.
- a detection signal is output.
- Fig. 4 shows the state in which the rod 22 has been pushed into the case. See Fig. 5 for the state in which the rod 22 is not pushed into the case.
- the rod 22 has an enlarged diameter portion 22a at a central part in the axial directions.
- This enlarged diameter portion 22a is formed to have a larger diameter than the leading end side and the base end side of the rod.
- a spring 23 Between the enlarged diameter portion 22a and the main body casing 21 is provided a spring 23.
- This spring 23 is provided to wrap the base end side of the rod 22 and biases the enlarged diameter portion 22a toward the leading end in the axial direction.
- a pair of plates 24 protrude from the enlarged diameter portion 22a in the directions orthogonal to the axial directions. Inside the main body casing 21 is a space in which the plates 24 can move for a predetermined distance in parallel to the axial directions of the rod 22.
- a pair of electrodes 25 are provided to oppose the pair of plates 24 in the axial direction toward the base end of the rod 22.
- a predetermined electrical circuit is constructed such that the electrodes 25 are electrically connected with each other and a detection signal is output as the pair of plates 24 contact the pair of electrodes 25.
- the door opening/closing device 1 includes a control unit constituted by components such as a micro computer having a CPU and a memory.
- the detection signal output from the limit switch 20 is input to the control unit via a wire connector 37 and an unillustrated wire.
- the control unit controls the opening/closing mechanism of the doors and the locking unit of the doors, based on the detection signal.
- the limit switch 20 is provided in the switch casing 30 such that the leading end of the rod 22 penetrates a through hole 33a made through the side wall 33 of the switch casing 30 and protrudes from the switch casing 30.
- the limit switch 20 is fixed to the bottom plate 31 of the switch casing 30 by a bolt or the like.
- the limit switch 20 is arranged so that the shaft of the rod 22 extends in parallel to the rail 40.
- a disc-shaped bush 35 is fixed on the external surface of the side wall 34 which is on the opposite side of the side wall 33 of the switch casing 30 through which the through hole 33a penetrated by the rod 22 is formed.
- This bush 35 is made of a material such as rubber, which has a lower rigidity than the side wall 34. While the present embodiment is arranged so that the bush 35 is made of rubber to prevent excessive impact on the door switch 10 at the timing of contacting the doors, the bush 35 may be made of a metal because of the presence of a later-described damper mechanism in the present embodiment, or may be omitted when adverse effects such as the deformation of the side wall 34 are not expected.
- supporting components 51a and 51b are fixed to extend upward.
- biasing shafts 52a and 52b are attached to extend in parallel to the opening/closing directions of the doors 100a and 100b.
- the biasing shaft 52a attached to the door 100a on the leading end side of the rod 22 when viewed from the door switch 10 is arranged to be substantially coaxial with the rod 22.
- a biasing plate 53a is fixed to be orthogonal to the biasing shaft 52a. When the door 100a moves in the closing direction, the biasing plate 53a biases the leading end of the rod 22.
- the biasing shaft 52b attached to the door 100b which is on the bush 35 side when viewed from the door switch 10 is arranged to be substantially coaxial with the central axis of the disc-shaped bush 35.
- a biasing plate 53b is fixed to be orthogonal to the biasing shaft 52b. When the door 100b moves in the closing direction, the biasing plate 53b biases the bush 35.
- Each of the biasing shafts 52a and 52b is provided with a damper mechanism.
- the damper mechanism has a function to dampen the impact caused when the biasing plates 53a and 53b contact the leading end of the rod 22 or the bush 35 as a result of the movement of the doors in the closing directions. While in the present embodiment the damper mechanism is constituted by a spring, the damper mechanism may be a combination of a spring and a shock absorber or made of rubber, on condition that the excessive impact on the door switch 10 at the time of the contact to the door is dampened.
- Fig. 6 is a schematic view for illustrating the operation of the door switch 10.
- the biasing shafts 52a and 52b and the biasing plates 53a and 53b shown in Fig. 2 are equivalent to biasing components 55a and 55b in Fig. 6 .
- the rod 22 and the pair of plates 24 shown in Fig. 4 are equivalent to a rod unit 26 in Fig. 6 which includes a rod 26a and a detection target portion 26b.
- the spring 23 shown in Fig. 4 is equivalent to a spring 27 in Fig. 6 .
- the switch casing 30 shown in Fig. 4 is equivalent to a switch casing 36 in Fig. 6 .
- the pair of electrodes 25 shown in Fig. 4 is equivalent to a detection unit 28 in Fig. 6 .
- Fig. 6(a) shows a state in which two double doors are correctly conducting the closing operation (i.e. a state in which the door 100a has not reached the full-closed position and the door 100b has not reached the full-closed position, either).
- Fig. 6(b) shows a state in which the two doors correctly conduct the closing operation and have reached the full-closed positions.
- Fig. 6(c) shows a state in which, due to a failure in the door opening/closing device 1, only one of the two double doors, i.e. , only the door 100a has reached the full-closed position.
- Fig. 6(d) shows a state in which, due to a failure in the door opening/closing device 1, only the other one of the two double doors, i.e., only the door 100b has reached the full-closed position.
- the rod unit 26 is moved by the biasing force of the biasing component 55a in the same direction as the movement of the biasing component 55a, against the biasing force of the spring 27 (see Fig. 6(b) ).
- the switch casing 36 is moved by the biasing force of the biasing component 55b on the sliding rail 40 (not shown in Fig. 6 ) in the same direction as the movement of the biasing component 55b, against the biasing force of the spring 27.
- the detection target portion 26b of the rod unit 26 contacts the detection unit 28.
- a detection signal is output to the control unit of the door opening/closing device 1.
- the control unit determines that the doors are fully closed, and operates the locking unit to prevent the doors from moving in the opening directions. More specifically, for example, the detection signal excites the solenoid and hence the locking shaft attached to the solenoid is engaged with the doors 100a and 100b, with the result that the movement of the doors 100a and 100b in the opening directions is prevented. In so doing, the control unit may stop the operation of the electric motor which is used for rotating the pinion of the door opening/closing device 1.
- the switch casing 36 moves along the sliding rail 40 in the same direction as the movement of the biasing component 55a.
- the spring 27 rarely contracts and the distance between the detection target portion 26b and the detection unit 28 remains almost the same as the distance in the state shown in Fig. 6(a) .
- the door opening/closing device 1 As described above, the door opening/closing device 1 according to the present embodiment is provided with the door switch 10.
- This door switch 10 is a door switch for a railroad vehicle attached to a railroad vehicle having double doors 100a and 100b, and includes: a rod 22 (first passive component) which is provided to be movable relative to a base plate 9 (vehicle main body) and is biased when one door 100a moves in the full-closed position; a switch casing 30 (second passive component) which is arranged to be movable relative to the base plate 9 and the rod 22 and is biased when the other door 100b moves in the full-closed position; an electric circuit (detection unit) which outputs a detection signal when the rod 22 and the switch casing 30 take predetermined relative positions and a pair of plates 24 fixed to the rod 22 contact a pair of electrodes 25 fixed to the switch casing 30; and a spring 23 (biasing member) which biases the rod 22 and the switch casing 30 to prevent the rod 22 and the switch casing 30 from taking the predetermined relative positions (i.e., the relative positions when the plates 24 contact the electrodes 25).
- the aforesaid predetermined relative positions are the relative positions of the rod 22 and the switch casing 30 when the rod 22 and the switch casing 30 are biased by the biasing plates 53a and 53b of two double doors 100a and 100b against the biasing force of the spring 23 and both of the two doors 100a and 100b reach the full-closed positions.
- the rod 22 and the switch casing 30 are arranged to be able to move in parallel to the opening/closing directions of the doors 100a and 100b, with respect to the base plate 9.
- the door driving mechanism the electric motor, the planetary gear mechanism 4, the rack-and-pinion mechanism, or the like
- the door switch 10 is provided with a limit switch 20.
- the limit switch 20 includes a rod 22, a switch casing 30 supporting the rod 22 to be axially movable, a spring 23 (elastic component) provided between the rod 22 and the switch casing 30, and an electric circuit (detection unit) which outputs a detection signal when the rod 22 moves for a predetermined distance with respect to the switch casing 30 against the elastic force of the spring 23 and a pair of plates 24 attached to the rod 22 contact a pair of electrodes 25.
- the limit switch 20 is arranged to be movable with respect to the base plate 9 in directions in parallel to the axial movement of the rod 22 with respect to the switch casing 30.
- the rod 22 moves with respect to the switch casing 30 against the elastic force of the spring 23.
- both of the two doors 100a and 100b reach the full-closed positions, the rod 22 moves for the predetermined distance with respect to the switch casing 30 so that the pair of plates 24 contact the pair of electrodes 25.
- the above-described door opening/closing device 1 having the door switch 10 includes a control unit which receives a detection signal output from the door switch 10. Receiving the detection signal from the door switch 10, the control unit drives the locking unit so as to lock the doors 100a and 100b at the full-closed positions.
- the detection signal output from the limit switch 20 is usable as a signal for determining the timing to lock the doors 100a and 100b.
- the relative moving distance of the rod 22 with respect to the switch casing 30 is advantageously long. That is to say, as shown in Fig. 6 , the moving distance of the door 100a from the timing at which the biasing component 55a starts to contact the rod unit 26 (i.e. , the state where the biasing component 55a is at the position indicated by two-dot chain lines in Fig. 6(a) ) to the timing at which the door 100a reaches the full-closed position (i.e., the state shown in Fig. 6(b) ) is half as long as the relative moving distance of the rod unit 26 with respect to the switch casing 36 (i.e., the degree of deformation of the spring 27).
- the embodiment may be modified in accordance with the unclaimed example below.
- Fig. 7 is a schematic view for explaining a first modification of the embodiment above.
- a door opening/closing device of the first modification is different from the device of the embodiment above in terms of the structure of the door switch. The following will therefore describe only the structure of the door switch and will not detail the other arrangements. It is noted that the components identical with those in the embodiment above will be denoted by the same reference numerals.
- a door switch 11 of the first modification includes a switch casing 61, two rods 62 and 63 provided so that the base end sides thereof are housed in the switch casing 61, springs 64 and 65 provided between the base ends of the rods 62 and 63 and the internal surface of the switch casing 61, a magnet 66 fixed to one rod 62, and a magnetic sensor 67 fixed to the other rod 63.
- biasing components 56a and 56b are provided to oppose the respective rods 62 and 63 in the opening/closing directions of the doors.
- the biasing components 56a and 56b are connected to the respective doors 100a and 100b and move in accordance with the movement of the doors 100a and 100b.
- the switch casing 61 is directly fixed to a base plate 9. In other words, the switch casing 61 is fixed so as not to move relative to the vehicle main body.
- the rod 62 is arranged so that its leading end protrudes from the switch casing 61 whereas its base end is housed in the switch casing 61.
- the rod 62 is arranged to be movable in the axial directions with respect to the switch casing 61.
- the moving directions of the rod 62 are in parallel to the opening/closing directions of the doors.
- the spring 64 biases the rod 62 from the base end side to the leading end side.
- the magnet 66 is fixed at a central portion of the rod 62 in the axial directions. This magnet 66 is fixed to the rod 62 to oppose the rod 63 side.
- the biasing component 56a biases the leading end of the rod 62.
- the rod 63 is arranged so that its leading end protrudes from the switch casing 61 in the opposite direction to the rod 62 and its base end is housed in the switch casing 61.
- the rod 63 is arranged to be movable in the axial directions with respect to the switch casing 61.
- the moving directions of the rod 63 are in parallel to the opening/closing directions of the doors .
- the rod 63 is at the substantially same position as the rod 62 in the direction orthogonal to the base plate 9 (i.e., the direction away from the viewer of Fig. 7 ).
- the rods 62 and 63 are arranged so that the central axis of the rod 62 and the central axis of the rod 63 are on a single linear line when viewed in the vertical direction.
- This spring 65 biases the rod 63 from the base end side to the leading end side.
- a magnetic sensor 67 is fixed at a central portion of the rod 63 in the axial directions . This the magnetic sensor 67 is fixed to the rod 63 to oppose the rod 62 side.
- the biasing component 56b biases the leading end of the rod 63.
- the biasing component 56a contacts the rod 62 and the biasing component 56b contacts the rod 63, with the result that the rod 62 is moved toward the biasing component 56b side by the biasing force of the biasing component 56a against the biasing force of the spring 64 whereas the rod 63 is moved toward the biasing component 56a side by the biasing force of the spring 65 against the biasing force of the biasing component 56b.
- the magnetic sensor 67 detects a magnetic force of the magnet 66 when the magnet 66 falls within a predetermined range around the sensor (hereinafter, the detection range of the magnetic sensor 67), and outputs a detection signal to the control unit of the door opening/closing device .
- the distance between the rods 62 and 63 is adjusted so that the magnet 66 falls within the detection range of the magnetic sensor 67 only when the magnet 66 opposes the magnetic sensor 67 (i.e., only when the distance between the magnet 66 and the magnetic sensor 67 becomes the closest).
- the magnetic sensor 67 outputs the detection signal only when both of the two doors 100a and 100b reach the full-closed positions.
- a door switch 11 includes a rod 62 (first passive component) which is provided to be movable relative to a base plate 9 (vehicle main body) and is biased when one door 100a moves toward the full-closed position, a rod 63 (second passive component) which is provided to be movable relative to the base plate 9 and the rod 62 and is biased when the other door 100b moves toward the full-closed position, a magnetic sensor 67 (detection unit) which outputs a detection signal when the rod 62 and the rod 63 take predetermined relative positions and the magnet 66 gets close to a detection range, and springs 64 and 65 (biasing members) which bias the rod 62 and the rod 63 to prevent the rod 62 and the rod 63 from taking the predetermined relative positions (i.e., the relative positions at which the magnet 66 falls within the detection range of the magnetic sensor 67).
- first passive component which is provided to be movable relative to a base plate 9 (vehicle main body) and is biased when one door 100
- the aforesaid predetermined relative positions are relative positions of the rod 62 and the rod 63 when both of the two doors 100a and 100b have moved to the full-closed positions while the rod 62 and the rod 63 are biased by the biasing components 56a and 56b attached to the doors 100a and 100b against the biasing forces of the springs 64 and 65.
- the rod 62 and the rod 63 do not take the aforesaid predetermined relative positions on account of the biasing forces of the springs 64 and 65, and hence the magnet 66 does not fall within the detection range of the magnetic sensor 67. No detection signal is therefore output to the control unit of the magnetic sensor 67.
- FIG. 8 and Fig. 9 are schematic views of a second modification of the embodiment above.
- a door opening/closing device according to the second modification is different from the device in the embodiment above in terms of the structure of the door switch. The following will therefore describe only the structure of the door switch and will not detail the other arrangements.
- the components identical with those in the embodiment above will be denoted by the same reference numerals.
- a door switch 12 of the second modification includes a shaft 71 which is fixed to a base plate 9 and extends orthogonal to the base plate 9, a fan-shaped plate-like first rotatable component 72 which is arranged to be in parallel to the base plate 9 and to be rotatable about the shaft 71, a long plate-shaped second rotatable component 73 which is arranged to overlap the first rotatable component 72 and to be rotatable about the shaft 71, a spring 74 provided between the first rotatable component 72 and the second rotatable component 73, a magnetic sensor 75 attached to the first rotatable component 72, a magnet 76 attached to the second rotatable component 73, a first stopper 77 which is fixed to the base plate 9 to prevent the rotation of the first rotatable component 72 (i.e.
- stick-shaped biasing components 57a and 57b extending in parallel to the opening/closing directions of the doors are fixed via the supporting components 51a and 51b.
- the first rotatable component 72 is rotatably connected to the shaft 71, at a part close to the center of the fan.
- the magnetic sensor 75 is fixed to a point which is near the arc edge of the fan-shaped first rotatable component 72 and is near the linear edge on the side opposite to the linear edge that the first stopper 77 contacts.
- the second rotatable component 73 is a long plate-shaped component whose length is substantially identical with the diameter of the first rotatable component 72.
- This second rotatable component 73 is rotatably connected to a part of the shaft 71 in the vicinity of one end, whereas the magnet 76 is fixed to a part of the shaft 71 in the vicinity of the other end.
- the second rotatable component 73 is arranged so that the distance between the shaft 71 and the magnet 76 is identical with the distance between the shaft 71 and the magnetic sensor 75.
- An end of the spring 74 is fixed to a part of the first rotatable component 72, which part is in the vicinity of the linear edge contacting the first stopper 77 and substantially at a central part of the first rotatable component 72 in the radial directions.
- the other end of the spring 74 is fixed to a substantially central part of the second rotatable component 73 in the longitudinal directions.
- the spring 74 biases the first rotatable component 72 to rotate the component in one direction about the shaft 71 (i.e., in the counterclockwise direction in Fig. 8 , as indicated by the arrow R1), and also biases the second rotatable component 73 to rotate the component in the other direction about the shaft 71 (i.e., in the clockwise direction in Fig. 8 , as indicated by the arrow R2).
- the magnetic sensor 75 and the magnet 76 are away form each other in the directions along the outer circumference of the shaft 71.
- the biasing components 57a and 57b move in the closing directions on account of the closing operations of the doors 100a and 100b, as shown in Fig. 8(b) , the biasing components 57a and 57b contact the edge portions of the first rotatable component 72 and the second rotatable component 73, respectively. More specifically, the biasing component 57a contacts the edge portion of the first rotatable component 72, which linearly extends in the radial directions. On the other hand, the biasing component 57b contacts the edge portion of the second rotatable component 73, which linearly extends in the longitudinal directions.
- the first rotatable component 72 is biased by the biasing component 57a and rotates about the shaft 71 away from the first stopper 77 (i.e., in the direction indicated by the arrow R2 in Fig. 8 ), against the biasing force of the spring 74.
- the second rotatable component 73 is biased by the biasing component 57b and rotates about the shaft 71 away from the second stopper 78 (i.e., in the direction indicated by the arrow R1 in Fig. 8 ), against the biasing force of the spring 74.
- the magnetic sensor 75 overlaps the magnet 76. In other words, the distance between the magnet 76 and the magnetic sensor 75 becomes the shortest.
- the magnetic sensor 75 detects a magnetic force of the magnet 76 when the magnet 75 falls within a predetermined range around the sensor (hereinafter, the detection range of the magnetic sensor 75), and outputs a detection signal to the control unit of the door opening/closing device.
- the distance between the first rotatable component 72 and the second rotatable component 73 is adjusted so that the magnet 76 falls within the detection range of the magnetic sensor 75 only when the magnet 76 overlaps the magnetic sensor 75 (i.e. , only when the distance between the magnet 76 and the magnetic sensor 75 becomes the shortest).
- the magnetic sensor 75 outputs the detection signal only when both of the two doors 100a and 100b are at the full-closed positions.
- a door switch 12 includes a first rotatable component 72 (first passive component) which is provided to be rotatable relative to a base plate 9 (vehicle main body) and is biased when one door 100a moves toward the full-closed position, a second rotatable component 73 (second passive component) which is provided to be rotatable relative to the base plate 9 and the first rotatable component 72 and is biased when the other door 100b moves toward the full-closed position, a magnetic sensor 75 (detection unit) which outputs a detection signal when the first rotatable component 72 and the second rotatable component 73 take predetermined relative positions and the magnet 76 gets close to a detection range, and a spring 74 (biasing member) which biases the first rotatable component 72 and the second rotatable component 73 to prevent the first rotatable component 72 and the second rotatable component 73 from taking the predetermined relative positions (i.e., the relative positions at which
- the predetermined relative positions are relative positions of the first rotatable component 72 and the second rotatable component 73 when the first rotatable component 72 and the second rotatable component 73 are biased by the biasing components 57a and 57b attached to the double doors 100a and 100b against the biasing force of the spring 74 and eventually both of the two doors 100a and 100b reach the full-closed positions.
- the biasing force of the spring 74 prevents the first rotatable component 72 and the second rotatable component 73 from taking the aforesaid relative positions, with the result that the magnet 76 does not fall within the detection range of the magnetic sensor 75 and no detection signal is output from the magnetic sensor 75 to the control unit.
- the first rotatable component 72 and the second rotatable component 73 are rotatably attached to the shaft 71 (rotation axis) which is fixed to the base plate 9, and the shaft 71 extends in the directions vertical to the flat plate-shaped doors 100a and 100b (i.e., in the width directions of the vehicle).
- the first rotatable component 72 and the second rotatable component 73 are formed to be flat plates and arranged so that the width directions of these components are in parallel to the shaft 71. This makes it possible to reduce the size of the door switch 12 in the width directions of the vehicle.
- the magnetic sensor 75 first detection unit
- the magnet 76 second detection unit
- the magnetic sensor 75 outputs a detection signal.
- the magnetic sensor 75 is provided at a position further from the shaft 71 than the position on the first rotatable component 72 at which the biasing force of the biasing component 57a is exerted.
- the magnet 76 is provided at a position further from the shaft 71 than the position on the second rotatable component 73 at which the biasing force of the biasing component 57a is exerted.
- the degree of change in the relative positions of the magnetic sensor 75 and the magnet 76 is great.
- a thin matter caught in between the closing doors 100a and 100b is detectable without increasing the sensitivity of the sensor.
- a first spring holding unit 81 is fixed in the vicinity of the first stopper 77 on the base plate 9 to protrude from the base plate 9. Furthermore, in the vicinity of the second stopper 78, a second spring holding unit 82 is fixed to protrude from the base plate 9. Between the first spring holding unit 81 and the first rotatable component 72 is provided a first spring 83. This first spring 83 pulls the first rotatable component 72 to cause the first rotatable component 72 to approach the first stopper 77. Between the second spring holding unit 82 and the second rotatable component 73 is provided a second spring 84. The second spring 84 pulls the second rotatable component 73 to cause the second rotatable component 73 to approach the second stopper 78.
- the arrangement shown in Fig. 10 also allows the door switch 12 to output a detection signal only when both of the two doors reach the respective full-closed positions.
- the first rotatable component 72 may be L-shaped or V-shaped as indicated by, for example, a first rotatable component 72' shown in Fig. 11 .
- This arrangement reduces the weight of the first rotatable component 72' and also reduces the space required for the rotation of the first rotatable component 72'.
- the rotation axis of the first rotatable component 72 and the rotation axis of the second rotatable component 73 may be provided at different locations, as individual components.
- the present invention can be used for a door opening/closing device for closing and opening double doors and a door switch for detecting whether the double doors are closed, which are provided in a railroad vehicle.
Description
- The present invention relates to an assembly comprising double doors for a railroad vehicle and a door switch, which detects that double doors have been closed.
- Patent Document 1 recites a known opening/closing device for double doors.
- This door opening/closing device is provided with a door closing switch substantially at the center of a base plate which is fixed to the vehicle main body. When the double doors are completely closed, a switch operating metal part of a hanging metal part of one door contacts the door closing switch, and the switch detects that the double doors are closed. A solenoid or the like is excited by a signal from the door closing switch, with the result that a locking shaft is engaged with a locking unit so as to lock the doors.
- Document
JP 51 074903 Documents JP 9 301158 JP 43 024933 - Patent Document 1: Japanese Unexamined Patent Publication No.
2002-309849 - The door opening/closing device above is arranged to operate so that the double doors are opened and closed by mechanically interlocking with each other. Therefore, when one of the double doors is at the full-closed position, the other door is usually at the full-closed position, too. It is therefore possible to determine, by using the door closing switch above, whether both of the double doors are at the full-closed positions.
- However, since there is a possibility of a failure in the mechanism of causing the double doors to interlock with each other, a door switch for a railroad vehicle, which certainly detects whether the double doors are at the full-closed positions even if there is a failure in the mechanism causing the doors to interlock with each other, has been on demand.
- A conceivable solution to the problem above is to provide two door closing switches each arranged as above, to correspond to the respective doors. This approach, however, requires another switch, and the increase in the number of electrical components may result in the increase in the failure rate of the entire system. Furthermore, the increase in the number of components results in the increase in the cost. Another conceivable solution to the problem above is to attach the door closing switch to one door instead of fixing it to the vehicle body, and the switch is operated by the other door. In this approach, however, since the wires of the door closing switch are moved for a long distance to the same degree as the opening/closing stroke, when the door is opened or closed, the wires are susceptible to disconnection and hence it is difficult to certainly detect whether the double doors are at the full-closed positions. Furthermore, since the wires are required to have high durability, cost increase is expected.
- An object of the present invention in consideration of the problem above is to provide a door switch for a railroad vehicle, which can reliably detect whether double doors are at full-closed positions without needing another switch, and to provide a door opening/closing device for a railroad vehicle equipped with the door switch.
- According to the first aspect of the present invention, an assembly includes the features of appended claim 1 and notably: a first passive component which is arranged to be movable relative to a vehicle main body and is biased when one of the doors moves toward a full-closed position; a second passive component which is arranged to be movable relative to the vehicle main body and the first passive component and is biased when the other one of the doors is moves toward a full-closed position; a detection unit which outputs a detection signal when the first passive component and the second passive component take predetermined relative positions; a biasing member which biases the first passive component and the second passive component to prevent the first passive component and the second passive component from taking the predetermined relative positions; the predetermined relative positions being relative positions of the first passive component and the second passive component when the first passive component and the second passive component are biased by the double doors against a biasing force of the biasing member and both of the double doors eventually reach the full-closed positions.
- According to this arrangement, when only one of the doors reaches the full-closed position whereas the other one of the doors has not reached the full-closed position, the biasing force of the biasing member prevents the first passive component and the second passive component from taking the predetermined relative positions, and hence no detection signal is output from the detection unit.
- This makes it possible to certainly detect whether the double doors are at the full-closed positions, without needing another switch.
- In some embodiments of the disclosure, the first passive component and the second passive component are arranged to be movable in opening/closing directions of the doors, with respect to the vehicle main body.
- According to this arrangement, it is possible to provide the door switch in a space which extends in directions in parallel to the opening/closing directions of the doors.
- In addition to the above, in the first aspect of the present invention, the door switch further includes: a limit switch including the first passive component, the second passive component movably support the first passive component, an elastic component provided between the first passive component and the second passive component and functioning as the biasing component, and the detection unit which outputs the detection signal when the first passive component moves for a predetermined distance with respect to the second passive component against an elastic force of the elastic component, the limit switch being arranged to be movable with respect to the vehicle main body in directions in parallel to a direction of movement of the first passive component with respect to the second passive component, and as one of the doors biases the first passive component and the other one of the doors biases the second passive component, the first passive component moving with respect to the second passive component against the elastic force of the elastic component, and a moving distance of the first passive component with respect to the second passive component being equal to the predetermined distance when both of the doors reach the full-closed positions.
- According to this arrangement, it is possible to certainly detect whether the double doors are at the full-closed positions by using the limit switch which outputs the detection signal when the moving distance of the first passive component with respect to the second passive component against the elastic force of the elastic component becomes equal to the predetermined distance. This ensures the reliability of the door switch because a conventional multi-purpose limit switch, which is highly reliable, is usable as the door switch.
- In some embodiments of the disclosure, the first passive component and the second passive component are rotatable about a rotation axis which is fixed to the vehicle main body, and the rotation axis extends in directions orthogonal to the flat plate-shaped doors.
- According to this arrangement, downsizing is easily achieved by forming the first passive component and the second passive component to be thin in the directions in parallel to the rotation axis.
- In some embodiments of the disclosure, the detection unit outputs the detection signal when the first detection unit attached to the first passive component and the second detection unit attached to the second passive component take a predetermined positional relationship, the first detection unit is provided at a position further from the rotation axis of the first passive component than a position at which the first passive component is biased by said one of the doors, and the second detection unit is provided at a position further from the rotation axis of the second passive component than a position at which the second passive component is biased by the other one of the doors.
- According to this arrangement, as compared to the moving distances of the doors n the closing directions, the degree of change in the relative positions of the first detection unit and the second detection unit is great. With this, by a simple structure, it is possible to prevent a detection signal indicating that the doors are closed from being erroneously output, when a foreign matter is caught in between the closing doors and hence the doors are not completely closed.
- In addition to the above, according to the present invention, a door opening/closing device for a railroad vehicle, which is used for opening and closing double doors, includes: the door switch according to claim 1 or 2; and a control unit which receives the detection signal output from the detection unit, the control unit driving a locking unit for locking the doors or controlling a drive output for opening and closing the doors, based on the detection signal.
- According to this arrangement, it is possible to certainly detect whether the double doors are at the full-closed positions, and to utilize the detection signal output from the detection unit for locking the doors or controlling the operation of the doors.
- This makes it possible to prevent the doors from being erroneously locked when at least one of the doors has not reached the full-closed position. Furthermore, it is possible to prevent the driving output for opening and closing the doors from being controlled when at least one of the doors has not reached the full-closed position.
- The assembly of the present invention and the door opening/closing device for the railroad vehicle equipped with the assembly make it possible to certainly detect whether the double doors are at the full-closed positions, without needing another switch.
-
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Fig. 1 is a general view of an assembly according to an embodiment of the present invention. -
Fig. 2 is an enlarged view of a door switch and its surroundings of the door opening/closing device shown inFig. 1 . -
Fig. 3 shows the door switch ofFig. 2 when the vehicle is viewed from the front in the direction in parallel to the opening/closing directions of the doors . -
Fig. 4 shows the details of the door switch ofFig. 2 .Fig. 5 shows the state in which no biasing force is exerted to the door switch ofFig. 4 . -
Fig. 6 is a schematic view for explaining the operation of the door switch shown inFig. 2 . -
Fig. 7 is a schematic view for explaining a first modification of the present embodiment. -
Fig. 8 is a schematic view for explaining the operation of a second modification of the present embodiment. -
Fig. 9 is a schematic view for explaining the operation of the second modification of the present embodiment. -
Fig. 10 is a schematic view for explaining the operation of a third modification of the present embodiment. -
Fig. 11 is a schematic view of a fourth modification of the present embodiment. - The following will describe an embodiment of the present invention with reference to figures.
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Fig. 1 is a general view of an assembly according to an embodiment of the present invention. - The door opening/closing device 1 is fixed to a side wall of the main body of a railroad vehicle via a base plate 2. The door opening/closing device 1 opens and closes a pair of double doors (
door 100a anddoor 100b) by using a rack-and-pinion mechanism. Thedoors racks respective racks - The door opening/closing device 1 includes an unillustrated direct-drive electric motor which can rotated both forward and backward and is fixed to the vehicle main body and a planetary gear mechanism 4 which transfers the rotation of the electric motor to the rack-and-pinion mechanism. As the electric motor is driven, the pinion is rotated via the planetary gear mechanism 4 and the pair of
racks - The pair of
racks door 100a and thedoor 100b, respectively, via a connecting mechanism. The connecting mechanism includes rack-side brackets respective racks rail components side brackets brackets respective rail components - The
rail components side brackets guide rails brackets door - According to the arrangement above, the electric motor of the door opening/closing device 1 rotates the pinion in one direction so that the
rack 3b moves toward the front of the vehicle (i.e., to the right inFig. 1 andFig. 2 ), with the result that thedoor 100b moves toward the front of the vehicle. At the same time, therack 3a moves toward the rear of the vehicle (i.e., to the left inFig. 1 andFig. 2 ), and hence thedoor 100a moves rearward. In other words, as the electric motor of the door opening/closing device 1 rotates the pinion in said one direction, thedoor 100a and thedoor 100b simultaneously move in the opening directions (indicated by the arrows X1 inFig. 1 andFig. 2 ). On the other hand, as the electric motor of the door opening/closing device 1 rotates the pinion in a direction opposite to said one direction, thedoor 100a and thedoor 100b simultaneously move in the closing directions (indicated by the arrows X2 inFig. 1 andFig. 2 ). - As such, the door opening/closing device 1 carries out the opening and closing operations of the
door 100a and thedoor 100b. - It is noted that the doors may not be opened and closed by using the rack-and-pinion mechanism. The opening/closing of the doors may be carried out by connecting an electric motor with doors by a belt, may be carried out by using ball screws, may be carried out by using a linear motor, or may be carried out by using fluid such as air or oil.
- The door opening/closing device 1 is provided with a
door switch 10 which can detect whether both of thedoor 100a and thedoor 100b are completely closed. - The
door switch 10 is provided at an upper part of the central portion of the entrance in the vehicle front-back directions (i.e., below the planetary gear mechanism 4), via abase plate 9. That is to say, thedoor switch 10 is arranged to locate above the anterior door ends of therespective doors -
Fig. 2 is an enlarged view of thedoor switch 10 and its surroundings of the door opening/closing device 1 shown inFig. 1 .Fig. 3 shows thedoor switch 10 ofFig. 2 when the vehicle is viewed from the front (i.e., from thebush 35 side) in the direction in parallel to the opening/closing directions of thedoors Fig. 4(a) shows thedoor switch 10 when viewed from the opposite side of thebase plate 9. InFig. 4(a) , a part of a main body casing 21 of alimit switch 20 is omitted to show the internal structure of thelimit switch 20.Fig. 4(b) shows thedoor switch 10 ofFig. 4(a) when viewed in the direction indicated by the arrow A. - As shown in
Fig. 2 , thedoor switch 10 includes alimit switch 20 and a box-shapedswitch casing 30 housing thelimit switch 20 therein. - As shown in
Fig. 3 , theswitch casing 30 is fixed to thebase plate 9 via therail 40. - As shown in
Fig. 3 andFig. 4 , therail 40 is fixed to thebase plate 9 to extend in parallel to the opening/closing directions of thedoors bottom plate 31 of theswitch casing 30, aguide component 32 is fixed to be engaged with therail 40. Thisguide component 32 is movable along the slidingrail 40 when engaged with the slidingrail 40. Theswitch casing 30 can therefore move in parallel to the opening/closing directions of thedoors rail 40. Furthermore, in the present embodiment, the side of theswitch casing 30 opposite to thebottom plate 31 is arranged to be open for the sake of easy maintenance of thelimit switch 20. - As shown in
Fig. 4 , thelimit switch 20 includes a main body casing 21 which can house a detection mechanism therein and arod 22 which protrudes from themain body casing 21. Therod 22 is supported by the main body casing 21 such that the leading end side and the base end side of therod 22 are inserted respectively to throughholes main body casing 21 and hence therod 22 is movable in the axial directions with respect to themain body casing 21. When the leading end of therod 22 is pushed into the main body casing 21 for a predetermined degree, a detection signal is output. (Fig. 4 shows the state in which therod 22 has been pushed into the case. SeeFig. 5 for the state in which therod 22 is not pushed into the case.) - More specifically, the
rod 22 has anenlarged diameter portion 22a at a central part in the axial directions. Thisenlarged diameter portion 22a is formed to have a larger diameter than the leading end side and the base end side of the rod. Between theenlarged diameter portion 22a and themain body casing 21 is provided aspring 23. Thisspring 23 is provided to wrap the base end side of therod 22 and biases theenlarged diameter portion 22a toward the leading end in the axial direction. Furthermore, a pair ofplates 24 protrude from theenlarged diameter portion 22a in the directions orthogonal to the axial directions. Inside themain body casing 21 is a space in which theplates 24 can move for a predetermined distance in parallel to the axial directions of therod 22. Furthermore, a pair ofelectrodes 25 are provided to oppose the pair ofplates 24 in the axial direction toward the base end of therod 22. A predetermined electrical circuit is constructed such that theelectrodes 25 are electrically connected with each other and a detection signal is output as the pair ofplates 24 contact the pair ofelectrodes 25. - With this, when the leading end of the
rod 22 is biased in the axial direction and therod 22 moves for a predetermined distance toward the base end against the biasing force of thespring 23, the pair ofplates 24 contact the pair ofelectrodes 25, with the result that a detection signal is output to the control unit of the door opening/closing device 1. - The door opening/closing device 1 includes a control unit constituted by components such as a micro computer having a CPU and a memory. The detection signal output from the
limit switch 20 is input to the control unit via awire connector 37 and an unillustrated wire. The control unit controls the opening/closing mechanism of the doors and the locking unit of the doors, based on the detection signal. - The
limit switch 20 is provided in theswitch casing 30 such that the leading end of therod 22 penetrates a throughhole 33a made through theside wall 33 of theswitch casing 30 and protrudes from theswitch casing 30. Thelimit switch 20 is fixed to thebottom plate 31 of theswitch casing 30 by a bolt or the like. Thelimit switch 20 is arranged so that the shaft of therod 22 extends in parallel to therail 40. - In addition to the above, on the external surface of the
side wall 34 which is on the opposite side of theside wall 33 of theswitch casing 30 through which the throughhole 33a penetrated by therod 22 is formed, a disc-shapedbush 35 is fixed. Thisbush 35 is made of a material such as rubber, which has a lower rigidity than theside wall 34. While the present embodiment is arranged so that thebush 35 is made of rubber to prevent excessive impact on thedoor switch 10 at the timing of contacting the doors, thebush 35 may be made of a metal because of the presence of a later-described damper mechanism in the present embodiment, or may be omitted when adverse effects such as the deformation of theside wall 34 are not expected. - As shown in
Fig. 2 , in the vicinities of the anterior door ends at the upper end portions of thedoors components components shafts doors - The biasing
shaft 52a attached to thedoor 100a on the leading end side of therod 22 when viewed from thedoor switch 10 is arranged to be substantially coaxial with therod 22. To the leading end of the biasingshaft 52a (i. e., the edge opposing the leading end of the rod 22), a biasingplate 53a is fixed to be orthogonal to the biasingshaft 52a. When thedoor 100a moves in the closing direction, the biasingplate 53a biases the leading end of therod 22. - The biasing
shaft 52b attached to thedoor 100b which is on thebush 35 side when viewed from thedoor switch 10 is arranged to be substantially coaxial with the central axis of the disc-shapedbush 35. To the leading end of the biasingshaft 52b (i.e. , the edge opposing the bush 35), a biasingplate 53b is fixed to be orthogonal to the biasingshaft 52b. When thedoor 100b moves in the closing direction, the biasingplate 53b biases thebush 35. - Each of the biasing
shafts biasing plates rod 22 or thebush 35 as a result of the movement of the doors in the closing directions. While in the present embodiment the damper mechanism is constituted by a spring, the damper mechanism may be a combination of a spring and a shock absorber or made of rubber, on condition that the excessive impact on thedoor switch 10 at the time of the contact to the door is dampened. -
Fig. 6 is a schematic view for illustrating the operation of thedoor switch 10. - It is noted that the components described in the embodiment correspond to the components schematically shown in
Fig. 6 as follows. - The biasing
shafts biasing plates Fig. 2 are equivalent to biasingcomponents Fig. 6 . Therod 22 and the pair ofplates 24 shown inFig. 4 are equivalent to arod unit 26 inFig. 6 which includes arod 26a and adetection target portion 26b. Thespring 23 shown inFig. 4 is equivalent to aspring 27 inFig. 6 . Theswitch casing 30 shown inFig. 4 is equivalent to aswitch casing 36 inFig. 6 . The pair ofelectrodes 25 shown inFig. 4 is equivalent to adetection unit 28 inFig. 6 . -
Fig. 6(a) shows a state in which two double doors are correctly conducting the closing operation (i.e. a state in which thedoor 100a has not reached the full-closed position and thedoor 100b has not reached the full-closed position, either). -
Fig. 6(b) shows a state in which the two doors correctly conduct the closing operation and have reached the full-closed positions. -
Fig. 6(c) shows a state in which, due to a failure in the door opening/closing device 1, only one of the two double doors, i.e. , only thedoor 100a has reached the full-closed position. -
Fig. 6(d) shows a state in which, due to a failure in the door opening/closing device 1, only the other one of the two double doors, i.e., only thedoor 100b has reached the full-closed position. - As shown in
Fig. 6(a) , when the two doors are away from the full-closed positions for predetermined distances, the biasingcomponents respective doors door switch 10. In this state, thedetection unit 28 is away from thedetection target portion 26b on account of the biasing force of thespring 27. - As the
doors Fig. 6(a) further move in the closing directions, the biasingcomponents respective doors Fig. 6 ), and consequently the biasingcomponents rod 26a and theswitch casing 36, almost at the same time (as indicated by two-dot chain lines inFig. 6(a) ). - Furthermore, as the
doors rod unit 26 is moved by the biasing force of thebiasing component 55a in the same direction as the movement of thebiasing component 55a, against the biasing force of the spring 27 (seeFig. 6(b) ). - On the other hand, the
switch casing 36 is moved by the biasing force of thebiasing component 55b on the sliding rail 40 (not shown inFig. 6 ) in the same direction as the movement of thebiasing component 55b, against the biasing force of thespring 27. - That is to say, as the
doors spring 27 is deformed and contracts, with the result that the relative positions of therod unit 26 and theswitch casing 36 are changed so that the distance between thedetection target portion 26b and thedetection unit 28 is shortened. - As shown in
Fig. 6(b) , when the bothdoors detection target portion 26b of therod unit 26 contacts thedetection unit 28. As thedetection target portion 26b contacts thedetection unit 28, a detection signal is output to the control unit of the door opening/closing device 1. Receiving the detection signal, the control unit determines that the doors are fully closed, and operates the locking unit to prevent the doors from moving in the opening directions. More specifically, for example, the detection signal excites the solenoid and hence the locking shaft attached to the solenoid is engaged with thedoors doors - As shown in
Fig. 6(c) , when the closing operation of thedoor 100b stops during movement of thedoors door 100a moves in the closing direction and thedoor switch 10 is biased only by thebiasing component 55a fixed to thisdoor 100a. In short, only therod unit 26 is directly biased in this case. - As only the
rod unit 26 is directly biased as above, theswitch casing 36 moves along the slidingrail 40 in the same direction as the movement of thebiasing component 55a. In this case, thespring 27 rarely contracts and the distance between thedetection target portion 26b and thedetection unit 28 remains almost the same as the distance in the state shown inFig. 6(a) . - For this reason, no detection signal is output from the
door switch 10 when thedoor 100b is not fully closed. - Similarly, as shown in
Fig. 6(d) , when the closing operation of thedoor 100a stops during the movement of thedoors door 100b moves in the closing direction and only thebiasing component 55b fixed to thisdoor 100b biases thedoor switch 10. In short, only theswitch casing 36 is directly biased in this case. - As such, since only the
switch casing 36 is directly biased, theswitch casing 36 and therod unit 26 move along the slidingrail 40 in the same direction as the movement of thebiasing component 55b. In this case, thespring 27 rarely contracts and the distance between thedetection target portion 26b and thedetection unit 28 remains almost the same as the distance in the state shown inFig. 6(a) . - For this reason, no detection signal is output from the
door switch 10 when thedoor 100a is not fully closed. - As described above, the door opening/closing device 1 according to the present embodiment is provided with the
door switch 10. - This
door switch 10 is a door switch for a railroad vehicle attached to a railroad vehicle havingdouble doors door 100a moves in the full-closed position; a switch casing 30 (second passive component) which is arranged to be movable relative to thebase plate 9 and therod 22 and is biased when theother door 100b moves in the full-closed position; an electric circuit (detection unit) which outputs a detection signal when therod 22 and theswitch casing 30 take predetermined relative positions and a pair ofplates 24 fixed to therod 22 contact a pair ofelectrodes 25 fixed to theswitch casing 30; and a spring 23 (biasing member) which biases therod 22 and theswitch casing 30 to prevent therod 22 and the switch casing 30 from taking the predetermined relative positions (i.e., the relative positions when theplates 24 contact the electrodes 25). The aforesaid predetermined relative positions are the relative positions of therod 22 and theswitch casing 30 when therod 22 and theswitch casing 30 are biased by the biasingplates double doors spring 23 and both of the twodoors - According to this arrangement, when only one of the
doors rod 22 and theswitch casing 30 do not take the aforesaid predetermined relative positions because of the biasing force of thespring 23, and hence theplates 24 do not contact theelectrodes 25. No detection signal is therefore output from thedoor switch 10 to the control unit. - This makes it possible to certainly detect whether the
double doors - In the
door switch 10, therod 22 and theswitch casing 30 are arranged to be able to move in parallel to the opening/closing directions of thedoors base plate 9. - According to this arrangement, it is possible to provide the
door switch 10 in a space which extends in directions in parallel to the opening/closing directions of thedoors - This makes it possible to provide the
door switch 10 in a space which is below the door driving mechanism (the electric motor, the planetary gear mechanism 4, the rack-and-pinion mechanism, or the like) and is between the door-hangingbracket 7a fixed to the anterior door end side of thedoor 100a and the door-hangingbracket 7b fixed to the anterior door end side of thedoor 100b when thedoors - The
door switch 10 is provided with alimit switch 20. - The
limit switch 20 includes arod 22, aswitch casing 30 supporting therod 22 to be axially movable, a spring 23 (elastic component) provided between therod 22 and theswitch casing 30, and an electric circuit (detection unit) which outputs a detection signal when therod 22 moves for a predetermined distance with respect to theswitch casing 30 against the elastic force of thespring 23 and a pair ofplates 24 attached to therod 22 contact a pair ofelectrodes 25. - The
limit switch 20 is arranged to be movable with respect to thebase plate 9 in directions in parallel to the axial movement of therod 22 with respect to theswitch casing 30. As the biasingplate 53a attached to onedoor 100a biases therod 22 and the biasingplate 53b attached to theother door 100b biases theswitch casing 30, therod 22 moves with respect to theswitch casing 30 against the elastic force of thespring 23. When both of the twodoors rod 22 moves for the predetermined distance with respect to theswitch casing 30 so that the pair ofplates 24 contact the pair ofelectrodes 25. - According to this arrangement, whether the double doors are at the full-closed positions is certainly detected by using the
limit switch 20 which outputs a detection signal when therod 22 has moved for the predetermined distance with respect to theswitch casing 30 against the elastic force of thespring 23. This ensures the reliability of thedoor switch 10 because a conventional multi-purpose limit switch, which is highly reliable, is usable as thedoor switch 10. - The above-described door opening/closing device 1 having the
door switch 10 includes a control unit which receives a detection signal output from thedoor switch 10. Receiving the detection signal from thedoor switch 10, the control unit drives the locking unit so as to lock thedoors - According to this arrangement, whether the
double doors limit switch 20 is usable as a signal for determining the timing to lock thedoors - It is therefore possible to prevent the locking unit from being mistakenly driven when at least one of the
doors - In the present embodiment, the relative moving distance of the
rod 22 with respect to theswitch casing 30 is advantageously long. That is to say, as shown inFig. 6 , the moving distance of thedoor 100a from the timing at which thebiasing component 55a starts to contact the rod unit 26 (i.e. , the state where thebiasing component 55a is at the position indicated by two-dot chain lines inFig. 6(a) ) to the timing at which thedoor 100a reaches the full-closed position (i.e., the state shown inFig. 6(b) ) is half as long as the relative moving distance of therod unit 26 with respect to the switch casing 36 (i.e., the degree of deformation of the spring 27). - On this account, a thin matter caught in between the closing
doors doors doors doors - The embodiment may be modified in accordance with the unclaimed example below.
-
Fig. 7 is a schematic view for explaining a first modification of the embodiment above. A door opening/closing device of the first modification is different from the device of the embodiment above in terms of the structure of the door switch. The following will therefore describe only the structure of the door switch and will not detail the other arrangements. It is noted that the components identical with those in the embodiment above will be denoted by the same reference numerals. - As shown in
Fig. 7 , adoor switch 11 of the first modification includes aswitch casing 61, tworods switch casing 61, springs 64 and 65 provided between the base ends of therods switch casing 61, amagnet 66 fixed to onerod 62, and amagnetic sensor 67 fixed to theother rod 63. - In addition to the above, biasing
components respective rods components respective doors doors - The
switch casing 61 is directly fixed to abase plate 9. In other words, theswitch casing 61 is fixed so as not to move relative to the vehicle main body. - The
rod 62 is arranged so that its leading end protrudes from theswitch casing 61 whereas its base end is housed in theswitch casing 61. Therod 62 is arranged to be movable in the axial directions with respect to theswitch casing 61. The moving directions of therod 62 are in parallel to the opening/closing directions of the doors. - Between the
rod 62 and theswitch casing 61 is provided aspring 64. Thespring 64 biases therod 62 from the base end side to the leading end side. - To the
rod 62, themagnet 66 is fixed at a central portion of therod 62 in the axial directions. Thismagnet 66 is fixed to therod 62 to oppose therod 63 side. - As the
door 100a conducts the closing operation and thebiasing component 56a moves in the closing direction, thebiasing component 56a biases the leading end of therod 62. - The
rod 63 is arranged so that its leading end protrudes from theswitch casing 61 in the opposite direction to therod 62 and its base end is housed in theswitch casing 61. Therod 63 is arranged to be movable in the axial directions with respect to theswitch casing 61. The moving directions of therod 63 are in parallel to the opening/closing directions of the doors . - The
rod 63 is at the substantially same position as therod 62 in the direction orthogonal to the base plate 9 (i.e., the direction away from the viewer ofFig. 7 ). In other words, therods rod 62 and the central axis of therod 63 are on a single linear line when viewed in the vertical direction. - Between the
rod 63 and theswitch casing 61 is provided aspring 65. Thisspring 65 biases therod 63 from the base end side to the leading end side. - To the
rod 63, amagnetic sensor 67 is fixed at a central portion of therod 63 in the axial directions . This themagnetic sensor 67 is fixed to therod 63 to oppose therod 62 side. - As the
door 100b conducts the closing operation and thebiasing component 56b moves in the closing direction, thebiasing component 56b biases the leading end of therod 63. - As shown in
Fig. 7(a) , when neither of therods components rod 62 is retained in the state in which the rod has been moved to thebiasing component 56a side by the biasing force of thespring 64 whereas therod 63 is retained in the state in which the rod has been moved to thebiasing component 56b side by the biasing force of thespring 65. For this reason, themagnet 66 is disposed not to oppose themagnetic sensor 67. - As the
doors biasing component 56a contacts therod 62 and thebiasing component 56b contacts therod 63, with the result that therod 62 is moved toward thebiasing component 56b side by the biasing force of thebiasing component 56a against the biasing force of thespring 64 whereas therod 63 is moved toward thebiasing component 56a side by the biasing force of thespring 65 against the biasing force of thebiasing component 56b. - Subsequently, as shown in
Fig. 7(b) , the twodoors magnet 66 opposes themagnetic sensor 67. In other words, the distance between themagnet 66 and themagnetic sensor 67 becomes the shortest. - The
magnetic sensor 67 detects a magnetic force of themagnet 66 when themagnet 66 falls within a predetermined range around the sensor (hereinafter, the detection range of the magnetic sensor 67), and outputs a detection signal to the control unit of the door opening/closing device . In the present modification, the distance between therods magnet 66 falls within the detection range of themagnetic sensor 67 only when themagnet 66 opposes the magnetic sensor 67 (i.e., only when the distance between themagnet 66 and themagnetic sensor 67 becomes the closest). - For this reason, the
magnetic sensor 67 outputs the detection signal only when both of the twodoors - Therefore, as shown in
Fig. 7(c) , when only onedoor 100a reaches the full-closed position whereas theother door 100b stops halfway due to a failure in the door opening/closing device 1, themagnetic sensor 67 and themagnet 66 do not oppose each other and hence themagnetic sensor 67 does not output the detection signal. - Similarly, as shown in
Fig. 7(d) , when only onedoor 100b reaches the full-closed position whereas theother door 100a stops halfway due to a failure in the door opening/closing device 1, themagnetic sensor 67 and themagnet 66 do not oppose each other and hence themagnetic sensor 67 does not output the detection signal. - As described above, a
door switch 11 according to the first modification includes a rod 62 (first passive component) which is provided to be movable relative to a base plate 9 (vehicle main body) and is biased when onedoor 100a moves toward the full-closed position, a rod 63 (second passive component) which is provided to be movable relative to thebase plate 9 and therod 62 and is biased when theother door 100b moves toward the full-closed position, a magnetic sensor 67 (detection unit) which outputs a detection signal when therod 62 and therod 63 take predetermined relative positions and themagnet 66 gets close to a detection range, and springs 64 and 65 (biasing members) which bias therod 62 and therod 63 to prevent therod 62 and therod 63 from taking the predetermined relative positions (i.e., the relative positions at which themagnet 66 falls within the detection range of the magnetic sensor 67). The aforesaid predetermined relative positions are relative positions of therod 62 and therod 63 when both of the twodoors rod 62 and therod 63 are biased by the biasingcomponents doors springs - According to this arrangement, when only one of the
doors rod 62 and therod 63 do not take the aforesaid predetermined relative positions on account of the biasing forces of thesprings magnet 66 does not fall within the detection range of themagnetic sensor 67. No detection signal is therefore output to the control unit of themagnetic sensor 67. - This makes it possible to certainly detect whether both of the
double doors - The embodiment above may be modified in accordance with the unclaimed example below.
-
Fig. 8 andFig. 9 are schematic views of a second modification of the embodiment above. A door opening/closing device according to the second modification is different from the device in the embodiment above in terms of the structure of the door switch. The following will therefore describe only the structure of the door switch and will not detail the other arrangements. The components identical with those in the embodiment above will be denoted by the same reference numerals. - As shown in
Fig. 8 , adoor switch 12 of the second modification includes ashaft 71 which is fixed to abase plate 9 and extends orthogonal to thebase plate 9, a fan-shaped plate-like firstrotatable component 72 which is arranged to be in parallel to thebase plate 9 and to be rotatable about theshaft 71, a long plate-shaped secondrotatable component 73 which is arranged to overlap the firstrotatable component 72 and to be rotatable about theshaft 71, aspring 74 provided between the firstrotatable component 72 and the secondrotatable component 73, amagnetic sensor 75 attached to the firstrotatable component 72, amagnet 76 attached to the secondrotatable component 73, afirst stopper 77 which is fixed to thebase plate 9 to prevent the rotation of the first rotatable component 72 (i.e. , the rotation in the direction indicated by the arrow R1 inFig. 8 ), and asecond stopper 78 which is fixed to thebase plate 9 to prevent the rotation of the second rotatable component 73 (i.e., the rotation in the direction indicated by the arrow R2 inFig. 8 ). - To the
doors biasing components components - The first
rotatable component 72 is rotatably connected to theshaft 71, at a part close to the center of the fan. Themagnetic sensor 75 is fixed to a point which is near the arc edge of the fan-shaped firstrotatable component 72 and is near the linear edge on the side opposite to the linear edge that thefirst stopper 77 contacts. - The second
rotatable component 73 is a long plate-shaped component whose length is substantially identical with the diameter of the firstrotatable component 72. This secondrotatable component 73 is rotatably connected to a part of theshaft 71 in the vicinity of one end, whereas themagnet 76 is fixed to a part of theshaft 71 in the vicinity of the other end. The secondrotatable component 73 is arranged so that the distance between theshaft 71 and themagnet 76 is identical with the distance between theshaft 71 and themagnetic sensor 75. - An end of the
spring 74 is fixed to a part of the firstrotatable component 72, which part is in the vicinity of the linear edge contacting thefirst stopper 77 and substantially at a central part of the firstrotatable component 72 in the radial directions. The other end of thespring 74 is fixed to a substantially central part of the secondrotatable component 73 in the longitudinal directions. Thespring 74 biases the firstrotatable component 72 to rotate the component in one direction about the shaft 71 (i.e., in the counterclockwise direction inFig. 8 , as indicated by the arrow R1), and also biases the secondrotatable component 73 to rotate the component in the other direction about the shaft 71 (i.e., in the clockwise direction inFig. 8 , as indicated by the arrow R2). - Therefore, when no external force (which is not exerted by the spring 74) is exerted to the first
rotatable component 72 and the secondrotatable component 73, as shown inFig. 8(a) , the firstrotatable component 72 is retained to contact thefirst stopper 77 whereas the secondrotatable component 73 is retained to contact thesecond stopper 78. - In this state, the
magnetic sensor 75 and themagnet 76 are away form each other in the directions along the outer circumference of theshaft 71. - As the biasing
components doors Fig. 8(b) , the biasingcomponents rotatable component 72 and the secondrotatable component 73, respectively. More specifically, thebiasing component 57a contacts the edge portion of the firstrotatable component 72, which linearly extends in the radial directions. On the other hand, thebiasing component 57b contacts the edge portion of the secondrotatable component 73, which linearly extends in the longitudinal directions. - In addition to the above, as the biasing
components rotatable component 72 is biased by thebiasing component 57a and rotates about theshaft 71 away from the first stopper 77 (i.e., in the direction indicated by the arrow R2 inFig. 8 ), against the biasing force of thespring 74. - Furthermore, the second
rotatable component 73 is biased by thebiasing component 57b and rotates about theshaft 71 away from the second stopper 78 (i.e., in the direction indicated by the arrow R1 inFig. 8 ), against the biasing force of thespring 74. - In other words, as the biasing
components magnetic sensor 75 and themagnet 76 move to approach each other. - When the two
doors Fig. 8(c) , themagnetic sensor 75 overlaps themagnet 76. In other words, the distance between themagnet 76 and themagnetic sensor 75 becomes the shortest. - The
magnetic sensor 75 detects a magnetic force of themagnet 76 when themagnet 75 falls within a predetermined range around the sensor (hereinafter, the detection range of the magnetic sensor 75), and outputs a detection signal to the control unit of the door opening/closing device. In the present modification, the distance between the firstrotatable component 72 and the second rotatable component 73 (in the directions in parallel to the shaft 71) is adjusted so that themagnet 76 falls within the detection range of themagnetic sensor 75 only when themagnet 76 overlaps the magnetic sensor 75 (i.e. , only when the distance between themagnet 76 and themagnetic sensor 75 becomes the shortest). - For this reason, the
magnetic sensor 75 outputs the detection signal only when both of the twodoors - Therefore, as shown in
Fig. 9(a) , when only onedoor 100a reaches the full-closed position whereas theother door 100b stops halfway due to a failure in the door opening/closing device 1, themagnetic sensor 75 does not overlap themagnet 76 and hence no detection signal is output from themagnetic sensor 75. - Similarly, as shown in
Fig. 9(b) , when only onedoor 100b reaches the full-closed position whereas theother door 100a stops halfway due to a failure in the door opening/closing device 1, themagnetic sensor 75 does not overlap themagnet 76 and hence no detection signal is output from themagnetic sensor 75. - As described above, a
door switch 12 according to the second modification includes a first rotatable component 72 (first passive component) which is provided to be rotatable relative to a base plate 9 (vehicle main body) and is biased when onedoor 100a moves toward the full-closed position, a second rotatable component 73 (second passive component) which is provided to be rotatable relative to thebase plate 9 and the firstrotatable component 72 and is biased when theother door 100b moves toward the full-closed position, a magnetic sensor 75 (detection unit) which outputs a detection signal when the firstrotatable component 72 and the secondrotatable component 73 take predetermined relative positions and themagnet 76 gets close to a detection range, and a spring 74 (biasing member) which biases the firstrotatable component 72 and the secondrotatable component 73 to prevent the firstrotatable component 72 and the secondrotatable component 73 from taking the predetermined relative positions (i.e., the relative positions at which themagnet 76 falls within the detection range of the magnetic sensor 75) . The predetermined relative positions are relative positions of the firstrotatable component 72 and the secondrotatable component 73 when the firstrotatable component 72 and the secondrotatable component 73 are biased by the biasingcomponents double doors spring 74 and eventually both of the twodoors - According to this arrangement, when only one of the two
doors spring 74 prevents the firstrotatable component 72 and the secondrotatable component 73 from taking the aforesaid relative positions, with the result that themagnet 76 does not fall within the detection range of themagnetic sensor 75 and no detection signal is output from themagnetic sensor 75 to the control unit. - This makes it possible to certainly detect whether both of the
double doors - In the
door switch 12, the firstrotatable component 72 and the secondrotatable component 73 are rotatably attached to the shaft 71 (rotation axis) which is fixed to thebase plate 9, and theshaft 71 extends in the directions vertical to the flat plate-shapeddoors - The first
rotatable component 72 and the secondrotatable component 73 are formed to be flat plates and arranged so that the width directions of these components are in parallel to theshaft 71. This makes it possible to reduce the size of thedoor switch 12 in the width directions of the vehicle. - In the
door switch 12, when the magnetic sensor 75 (first detection unit) attached to the firstrotatable component 72 and the magnet 76 (second detection unit) attached to the secondrotatable component 73 take a predetermined positional relationship, i.e., when themagnet 76 enters the detection range of themagnetic sensor 75, themagnetic sensor 75 outputs a detection signal. Themagnetic sensor 75 is provided at a position further from theshaft 71 than the position on the firstrotatable component 72 at which the biasing force of thebiasing component 57a is exerted. On the other hand, themagnet 76 is provided at a position further from theshaft 71 than the position on the secondrotatable component 73 at which the biasing force of thebiasing component 57a is exerted. - According to the arrangement above, as compared to the moving distances of the
doors rotatable component 72 and the second rotatable component 73), the degree of change in the relative positions of themagnetic sensor 75 and themagnet 76 is great. With this, a thin matter caught in between the closingdoors doors doors doors - In addition to the second modification in which the
spring 74 is provided between the firstrotatable component 72 and the secondrotatable component 73, the arrangement shown inFig. 10 may be employed. - According to this arrangement, which is not claimed, a first
spring holding unit 81 is fixed in the vicinity of thefirst stopper 77 on thebase plate 9 to protrude from thebase plate 9. Furthermore, in the vicinity of thesecond stopper 78, a secondspring holding unit 82 is fixed to protrude from thebase plate 9. Between the firstspring holding unit 81 and the firstrotatable component 72 is provided afirst spring 83. Thisfirst spring 83 pulls the firstrotatable component 72 to cause the firstrotatable component 72 to approach thefirst stopper 77. Between the secondspring holding unit 82 and the secondrotatable component 73 is provided asecond spring 84. Thesecond spring 84 pulls the secondrotatable component 73 to cause the secondrotatable component 73 to approach thesecond stopper 78. - Therefore, when no external force (which is not exerted by the spring 74) is exerted to the first
rotatable component 72 and the secondrotatable component 73, as shown inFig. 10(a) , the firstrotatable component 72 is retained to contact thefirst stopper 77 and the secondrotatable component 73 is retained to contact thesecond stopper 78. - When both of the two doors reach the full-closed positions, as shown in
Fig. 10(b) , themagnetic sensor 75 overlaps themagnet 76. - As such, the arrangement shown in
Fig. 10 also allows thedoor switch 12 to output a detection signal only when both of the two doors reach the respective full-closed positions. - In addition to the third modification in which the first
rotatable component 72 is fan-shaped, the first rotatable component may be L-shaped or V-shaped as indicated by, for example, a first rotatable component 72' shown inFig. 11 . This arrangement, which is not claimed, reduces the weight of the first rotatable component 72' and also reduces the space required for the rotation of the first rotatable component 72'. - Furthermore, in addition to the second to fourth modifications in which the first
rotatable component 72 and the secondrotatable component 73 share the same rotation axis (shaft 71), the rotation axis of the firstrotatable component 72 and the rotation axis of the secondrotatable component 73 may be provided at different locations, as individual components. - The embodiment and modifications of the present invention have been described above. The present invention, however, is not limited to them and may be variously changed within the scope of claims.
- The present invention can be used for a door opening/closing device for closing and opening double doors and a door switch for detecting whether the double doors are closed, which are provided in a railroad vehicle.
-
- 1 DOOR OPENING/CLOSING DEVICE
- 10 DOOR SWITCH
- 22 ROD (FIRST PASSIVE COMPONENT)
- 23 SPRING (BIASING MEMBER)
- 30 SWITCH CASING (SECOND PASSIVE COMPONENT)
- 100a, 100b DOOR
- 62, 63 ROD (FIRST PASSIVE COMPONENT, SECOND PASSIVE COMPONENT)
- 64,65 SPRING (BIASING MEMBER)
- 67 MAGNETIC SENSOR (DETECTION UNIT)
- 72 FIRST ROTATABLE COMPONENT (FIRST PASSIVE COMPONENT)
- 73 SECOND ROTATABLE COMPONENT (SECOND PASSIVE COMPONENT)
- 74 SPRING (BIASING MEMBER)
- 75 MAGNETIC SENSOR (DETECTION UNIT FIRST DETECTION UNIT)
- 76 MAGNET (SECOND DETECTION UNIT)
Claims (3)
- An assembly comprising double doors for a railroad vehicle and a door switch, the door switch comprising:a first passive component (22) which is arranged to be movable relative to the double doors and a vehicle main body and is biased by one of the doors when said one of the doors (100a) moves toward a full-closed position;a second passive component (30) which is arranged to be movable relative to the double doors and the vehicle main body and the first passive component (22) and is biased by the other one of the doors when the other one of the doors (100b) moves toward a full-closed position;a detection unit (25) which is configured to output a detection signal when the first passive component (22) and the second passive component (30) take predetermined relative positions;an elastic component (23) which biases the first passive component (22) and the second passive component (30) to prevent the first passive component (22) and the second passive component (30) from taking the predetermined relative positions;the predetermined relative positions being relative positions of the first passive component (22) and the second passive component (30) when the first passive component (22) and the second passive component (30) are biased by the double doors (100a, 100b) against a biasing force of the elastic component (23) and both of the double doors (100a,100b) eventually reach the full-closed positions,characterized in that the door switch comprises a limit switch (20) including the first passive component (22), the second passive component (30) movably supporting the first passive component (22), the elastic component (23) provided between the first passive component (22) and the second passive component (30), and the detection unit which outputs the detection signal when the first passive component (22) moves for a predetermined distance with respect to the second passive component (30) against an elastic force of the elastic component (23), in that the limit switch (20) is arranged to be movable with respect to the vehicle main body in directions in parallel to a direction of movement of the first passive component (22) with respect to the second passive component (30), in that, as said one of the doors (100a) biases the first passive component (22) and the other one (100b) of the doors biases the second passive component (30), the first passive component (22) moves with respect to the second passive component (30) against the elastic force of the elastic component (23), and in that a moving distance of the first passive component (22) with respect to the second passive component (30) is equal to the predetermined distance when both of the doors (100a, 100b) reach the full-closed positions.
- The assembly according to claim 1, wherein the first passive component (22) and the second passive component (30) are arranged to be movable in opening/closing directions of the doors (100a,100b), with respect to the vehicle main body.
- A door opening/closing device for a railroad vehicle, which is configured for opening and closing double doors, characterized by comprising:the assembly according to claim 1 or 2; anda control unit which is configured to receive the detection signal output from the detection unit (25),the control unit being configured to drive a locking unit for locking the doors (100a,100b) or to control a drive output for opening and closing the doors (100a,100b), based on the detection signal.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009148966 | 2009-06-23 | ||
PCT/JP2010/059180 WO2010150623A1 (en) | 2009-06-23 | 2010-05-31 | Door switch for railroad vehicle, and door opening/closing device adapted for use in railroad vehicle and provided with the door switch |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2447130A1 EP2447130A1 (en) | 2012-05-02 |
EP2447130A4 EP2447130A4 (en) | 2013-06-05 |
EP2447130B1 true EP2447130B1 (en) | 2019-02-06 |
Family
ID=43386396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10791941.7A Not-in-force EP2447130B1 (en) | 2009-06-23 | 2010-05-31 | Door switch for railroad vehicle, and door opening/closing device adapted for use in railroad vehicle and provided with the door switch |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2447130B1 (en) |
JP (1) | JP5404786B2 (en) |
CN (1) | CN102803043B (en) |
HK (1) | HK1176913A1 (en) |
TW (1) | TWI558900B (en) |
WO (1) | WO2010150623A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITUD20130106A1 (en) * | 2013-08-09 | 2015-02-10 | Mios Elettronica S R L | EQUIPMENT FOR THE OPENING / CLOSING OF A DOOR FOR MEANS OF TRANSPORT AND PROCEDURE FOR OPENING / CLOSING A DOOR |
JP6576628B2 (en) * | 2014-10-31 | 2019-09-18 | ナブテスコ株式会社 | Lock device for vehicle door |
JP6692576B2 (en) * | 2016-06-01 | 2020-05-13 | 公益財団法人鉄道総合技術研究所 | Short circuit structure of detector |
CN107795225B (en) * | 2017-11-17 | 2019-08-27 | 湖南铁道职业技术学院天一实业有限公司 | A kind of automatic open and close control method of locomotive car door |
JP7141900B2 (en) * | 2018-09-18 | 2022-09-26 | ナブテスコ株式会社 | Locking device and door drive unit with locking device |
JP7202880B2 (en) | 2018-12-26 | 2023-01-12 | ナブテスコ株式会社 | Vehicle door switch and installation method of vehicle door switch |
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GB954592A (en) * | 1961-01-11 | 1964-04-08 | Kunimori Mariyama | Apparatus for opening and closing the door of a vehicle |
JPS4324932Y1 (en) * | 1965-06-28 | 1968-10-19 | ||
JPS4324933Y1 (en) * | 1965-06-28 | 1968-10-19 | ||
JPS5229364Y2 (en) * | 1974-12-09 | 1977-07-05 | ||
JPS60157468U (en) * | 1984-03-30 | 1985-10-19 | 株式会社日立製作所 | Vehicle door lock detection device |
DE3500958A1 (en) * | 1985-01-14 | 1986-07-17 | Knorr-Bremse AG, 8000 München | Control device for doors |
JP2950044B2 (en) * | 1992-10-05 | 1999-09-20 | 富士電機株式会社 | Sliding door closing device for vehicles |
JP3074116B2 (en) * | 1994-12-12 | 2000-08-07 | 株式会社大井製作所 | Door closure |
JPH09301158A (en) * | 1996-05-14 | 1997-11-25 | Koshin Seikosho:Kk | Door closing confirming device |
US5893236A (en) * | 1997-05-13 | 1999-04-13 | Westinghouse Air Brake Company | Power operator for sliding plug doors |
US6032416A (en) * | 1998-06-18 | 2000-03-07 | Westinghouse Air Brake Company | Transit vehicle door |
JP3485315B2 (en) | 2001-04-17 | 2004-01-13 | 東日本トランスポ−テック株式会社 | Rail vehicle door opening and closing device |
TWI231336B (en) * | 2004-01-20 | 2005-04-21 | Jin-Shan Hung | Electrical roll shutter door |
-
2010
- 2010-05-31 EP EP10791941.7A patent/EP2447130B1/en not_active Not-in-force
- 2010-05-31 JP JP2011519710A patent/JP5404786B2/en active Active
- 2010-05-31 CN CN201080027837.5A patent/CN102803043B/en active Active
- 2010-05-31 WO PCT/JP2010/059180 patent/WO2010150623A1/en active Application Filing
- 2010-06-08 TW TW099118573A patent/TWI558900B/en active
-
2013
- 2013-03-27 HK HK13103871.3A patent/HK1176913A1/en unknown
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
TWI558900B (en) | 2016-11-21 |
CN102803043B (en) | 2016-09-21 |
EP2447130A1 (en) | 2012-05-02 |
TW201111609A (en) | 2011-04-01 |
JPWO2010150623A1 (en) | 2012-12-10 |
EP2447130A4 (en) | 2013-06-05 |
WO2010150623A1 (en) | 2010-12-29 |
HK1176913A1 (en) | 2013-08-09 |
CN102803043A (en) | 2012-11-28 |
JP5404786B2 (en) | 2014-02-05 |
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