JP6611692B2 - Platform door device - Google Patents

Description

  The present invention relates to a landing door device that operates when a landing door of an elevator opens.

  The elevator is configured such that, during normal operation, when the basket reaches the landing and the basket side door opens, the lock that stops the landing door with respect to the landing stationary portion is released and the landing door opens. However, at the time of an elevator failure or maintenance inspection, including when the passenger is trapped in the cage, the landing door must be opened and closed to rescue the passenger even if it is not possible to confirm whether the cage is landing on the landing. It may be necessary. For such a case, as described in Patent Document 1, when the key is inserted from the key insertion portion provided on the landing side of the landing door, the elevator is unlocked and the landing door is manually operated. It is designed to open with.

Japanese Utility Model Publication No. 58-170365

  When the key is inserted into the key insertion part and the landing door is opened, the cage is not landing on the landing, and the opening after the landing door is opened is connected to the hoistway (cavity) instead of the cage room A situation can arise. And even if such a case arises, it will be of great significance if maintenance workers or the like can be prevented from falling onto the hoistway.

  An object of the present invention is to provide a landing door device that can prevent a person from falling into a hoistway from an opening after the landing door is manually opened.

The landing door device according to the present invention is a landing door device that operates when the landing door is manually opened by manually releasing a lock mechanism that prevents the elevator landing door from being manually opened. An electromagnet attached to one of a pair of door opening side facing portions facing each other in the moving direction of the landing door across an opening generated when the door is opened, and the other of the pair of door opening side facing portions The cord is attached so as to face the electromagnet in the moving direction, and has one end fixed to one of a magnetic member made of a magnetic material, the electromagnet, and the magnetic member. When it is determined that the car is present in the landing zone based on a member, a landing sensor that detects whether the car exists in the landing zone, and a signal from the landing sensor, the electromagnetic When the current flowing in the electromagnet is controlled so that no attractive force acts between the electromagnet and the magnetic member, the electromagnet and the magnetic member are determined when it is determined that the cage does not exist in the landing zone. And a control device that controls the current flowing through the electromagnet so as to attract each other, and the one member is movable in the moving direction with respect to the door opening side facing portion to which the one member is attached. When the landing door is manually opened while the electromagnet and the magnetic member are attracting each other, the string member crosses the opening in the moving direction so that the pair of the pair of strings extend between the door opening side facing portion, when said cord member extends so as to traverse the opening in the moving direction, the optionally magnetic member is in contact with the electromagnet, the string The member is the one Department said moves in the movement direction with the movement of the said moving direction of the one member which is fixed.

  When the landing door opens, it includes two opening-side doors that move in opposite directions, and an opening occurs between the two opening-side doors, and when the landing door opens, all the doors are all in the same direction. It may move and an opening may arise between the opening side door located in the opening side, and the wall part of a hall. In the former case, the pair of door opening side facing portions are the two opening side doors, and in the latter case, the pair of door opening side facing portions are the opening side door and the wall of the landing.

  According to the present invention, when the control device determines that the car is not in the landing zone based on the signal from the landing sensor, the current flowing in the coil is attracted so that the electromagnet and the magnetic member attract each other. Control. In that case, when the landing door is manually opened, the string member fixed to one of the electromagnet and the magnetic member moves the opening in the moving direction based on the fixation of the electromagnet and the magnetic member by the magnetic force. It extends between a pair of door opening side opposing parts so that it may cross. Therefore, if the landing door is opened when there is no basket, the presence of the drawn string member can alert the user (maintenance worker, etc.) that there is no basket, and the user can move to the hoistway side. When trying to do so, the force from the string member to the landing side (the side opposite to the hoistway side) can be applied to the user. Therefore, it can prevent that a user falls to a hoistway from the opening after a landing door is manually opened by the said string member.

  Further, in the present invention, the magnetic member is a permanent magnet, and when the control device determines that the cage is in a state free of current, the electromagnet and the magnetic body are prevented from flowing current through the electromagnet. While making it attract | suck with a member, when it is judged that it is the said state with a basket, you may send the electric current which a repulsive force acts between the said permanent magnet and the said electromagnet to the said electromagnet.

  In general, if a permanent magnet is used, it is easier to generate a stronger magnetic force than when an electromagnet is used. According to the above configuration, the attractive force that acts between the electromagnet and the magnetic member when there is no cage is a strong attractive force that acts between the permanent magnet and the magnetic material. Therefore, it is possible to substantially prevent the electromagnet and the magnetic member fixed to each other by magnetic force from being separated from each other. As a result, it is possible to reliably prevent a user who tries to move to the hoistway side with the string member crossing the opening from falling to the hoistway.

  Further, in the present invention, the magnetic member is a magnetic body that is not a permanent magnet, and when the control device determines that the cage is in a state free of current, the electromagnet and the magnetic body are caused to flow by passing an electric current through the electromagnet. When the member is attracted to each other, if it is determined that the cage is present, no current is applied to the electromagnet so that no force acts between the electromagnet and the magnetic member. May be.

  In general, when the elevator is driven, the time during which the cage is stopped in the landing zone is longer than the time during which the cage is moving up and down the hoistway. According to the above configuration, no current flows through the coil when the car is stopped in the landing zone. Therefore, the time for the current to flow through the coil can be shortened compared to the case where the current flows through the coil when the car is stopped in the landing zone, and the running cost can be reduced.

  Moreover, in this invention, the string winder which winds up the said string member may be attached to the said door opening side opposing part to which said one member was attached.

  According to the said structure, the accommodation space of a string member can be made small and a landing door apparatus can be comprised compactly.

  Moreover, in this invention, you may further provide the operation part which makes the said control apparatus control that an attractive force does not act between the said electromagnet and the said magnetic body member.

  In some cases, the connector of the cable connected to the control device is on the back side of the operation panel on which the landing button is installed. The operation unit includes, for example, a maintenance unit that is connected to the connector and can input a control signal to the control device. Alternatively, the operation unit may be configured to be connected to a cable on the back side of the operation panel on which the landing button is installed and to output a control signal to the control device via the cable.

  When a maintenance worker gets on the cage to perform maintenance, or goes down to a pit below the hoistway to perform maintenance, the maintenance worker straddles the opening even if the cage is not in the landing zone. Need to move to. In such a case, if the string member crosses the opening, the string member may obstruct the passage of the opening of a maintenance worker or the like, which may hinder smooth maintenance inspection.

  According to the above configuration, it is possible to cause the control device to perform control in which no attractive force acts between the electromagnet and the magnetic member by the operation unit. Therefore, the electromagnet can be easily separated from the magnetic member during maintenance on the cage or maintenance on the pit, and the maintenance can be performed smoothly.

Further, in the present invention, the plurality of electromagnets, the plurality of magnetic members, and the plurality of string members, and when the landing door is manually opened when the cage is in a state without the basket, the plurality of string members May traverse the opening in the direction of movement while spaced apart from each other in the height direction.

  In this case, it is preferable that one string member is arranged in a range that can be grasped by the user's hand in a state where all the string members are pulled out and cross the opening. It is preferable that the member is disposed at the height of the user's waist.

  According to the said structure, a some string member crosses the opening produced by opening operation of a landing door when there is no basket. Therefore, it is possible to more reliably prevent a user such as a maintenance worker from falling on the hoistway.

  According to the landing door device according to the present invention, it is possible to prevent a person from falling into the hoistway from the opening after the landing door is manually opened.

It is a model front view when the elevator which installed the landing door apparatus which concerns on one Embodiment of this invention is seen from the landing side. It is a figure explaining the outline | summary of the hall door apparatus installed in the back side of the hall door of an elevator, and is a schematic diagram when the hall door is seen from the hall side. It is a figure explaining the outline | summary of the mechanism which supplies electric power to the electromagnet of a landing door apparatus. It is a figure when the state which the landing door was opened manually in the case where a cage exists in the landing zone is viewed from the landing side. It is a figure when the state which the landing door was opened manually when the cage does not exist in the landing zone is viewed from the landing side. It is a figure showing the state which has connected the maintenance unit to the connector of the cable installed in the back side of the operation panel in which the boarding button was installed.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. In the following, when a plurality of embodiments and modifications are included, it is assumed from the beginning that a new embodiment is constructed by appropriately combining these characteristic portions. In the following description and drawings, the X direction indicates the width direction of the landing door 2 (the moving direction of the landing door 2), the Y direction indicates the thickness direction of the landing door 2, and the Z direction indicates the landing door. The height direction of 2 is shown. In addition, in FIGS. 2, 3, and 5 below, the landing door device 10 cannot actually be visually recognized and the landing door device 10 needs to be represented by a dotted line. For the sake of clarity, the landing door device 10 is represented by a solid line.

  FIG. 1 is a schematic front view of an elevator 1 provided with a landing door device according to an embodiment of the present invention when viewed from the landing side. Moreover, FIG. 2 is a figure explaining the outline | summary of the landing door apparatus 10 installed in the back side of the landing door 2 of the elevator 1, and is a schematic diagram when the landing door 2 is seen from the landing side.

  Referring to FIG. 1, the landing door device is installed on the back side of landing door 2 so as to straddle a pair of opening-side doors 2a and 2b facing each other in the X direction across the opening when landing door 2 is opened. The The pair of opening side doors 2a and 2b constitute a pair of door opening side facing portions. The landing door device is provided, for example, in a region R including the periphery of the chest height of an adult male in the Z direction.

  As shown in FIG. 2, the landing door device 10 includes an upper landing door device 20 and a lower landing door device 40. The upper landing door device 20 is installed, for example, in a region including the periphery of the chest height of an adult male, and the lower landing door device 40 is installed in a region including the periphery of the waist height of the adult male. The upper landing door device 20 and the lower landing door device 40 have the same configuration except for the installation position in the Z direction. Hereinafter, only the upper landing door device 20 will be described, and the description of the lower landing door device 40 will be omitted with the description of the upper landing door device 20.

  The upper landing door device 20 includes an electromagnet 21, a permanent magnet 22 as an example of a magnetic member, a barricade rope 23 as an example of a string member, and a rope winder 24 as an example of a string winder. The electromagnet 21 is attached to the opening-side door 2a in a state in which the electromagnet 21 cannot move relative to the one opening-side door 2a. On the other hand, the permanent magnet 22 is attached to the other opening side door 2b in a state in which the permanent magnet 22 can move relative to the other opening side door 2b in the X direction. Specifically, a magnet housing case in which only one opening side door 2a side in the Y direction is opened is provided on the back side of the other opening side door 2b, which is opposite to the Y side opening side door 2a side of the magnet housing case. A rope passage hole is provided at the bottom on the side. The permanent magnet 22 has a substantially rectangular parallelepiped shape, and the inner chamber of the magnet housing case is slightly larger than the permanent magnet 22 and has a shape corresponding to the shape of the permanent magnet 22. The permanent magnet 22 is housed in the magnet housing case in a state where the landing door 2 is closed. The permanent magnet 22 is disposed at the same height as the electromagnet 21, and the permanent magnet 22 and the electromagnet 21 face each other in the Y direction. The permanent magnet 22 is urged toward the bottom of the magnet housing case by a mechanism described below.

  The barricade rope 23 is configured by twisting at least one of a fiber and a steel wire, for example. The barricade rope 23 is installed on the other opening side door 2b so as to be relatively movable with respect to the other opening side door 2b. The barricade rope 23 passes through the rope passage hole, and one end of the barricade rope 23 is fixed to the permanent magnet 22 by a fixing means such as an adhesive. The permanent magnet 23 constitutes one member to which one end of the string member is fixed. The rope winder 24 accommodates the barricade rope 23 by a mechanism that accommodates, for example, a tape measure or a vacuum cleaner cord. Specifically, in the rope winder 24, a drum that is rotatable with respect to the case of the rope winder 24 and a spring spring that is provided in the drum and has one end fixed to the case are disposed. . The barricade rope 23 is wound around a drum, and the other end of the barricade rope 23 is attached to the other end of the spring. When the barricade rope 23 is pulled out from the rope winder 24, the mainspring spring is deformed based on the force with which the barricade rope 23 is pulled out, and energy is stored in the mainspring spring. And the force with which the barricade rope 23 is drawn in in a case by a mainspring spring is provided. The permanent magnet 22 is accommodated in the magnet accommodation case in a state in which the permanent magnet 22 is in contact with the bottom of the magnet accommodation case by a force from the mainspring spring in a state where there is no force to pull out the barricade rope 23.

  Electric power is supplied to the electromagnet 21 via the cable 25. Specifically, as shown in FIG. 3, that is, a diagram explaining an outline of a mechanism for supplying electric power to the electromagnet 21, the electromagnet 21 has a coil 31 and an iron core 32, and the coil 31 is an iron core 32. Wound around. The coil 31 is incorporated in the power supply circuit 50, one end of the coil 31 is electrically connected to the positive electrode of the power source 33, and the other end of the coil 31 is electrically connected to the negative electrode of the power source 33. The cable 25 accommodates an electric wire connected to one end of the coil 31 and an electric wire connected to the other end of the coil.

  A switch unit 35 is incorporated in the power supply circuit 50. The switch unit 35 is configured by a switching element configured by, for example, an electromagnetic relay or a transistor. The landing door device 10 further includes a control device 60 and a landing sensor 61. The landing door device 10 controls the current flowing through the coil 31 by the control device 60. For example, in the case of an elevator without a machine room, the control device 60 is provided in a pit located at the lower part of the hoistway. In the case of an elevator with a machine room, the control device 60 is provided in the machine room.

  The control device 60 performs all control necessary for operation of the elevator 1 (see FIG. 1). Specifically, the control device 60 is provided at a landing button 55 (see FIG. 1) that is provided at a landing on each floor and calls a basket, or a destination floor button (not shown) that is provided within a basket (not shown) and designates a destination floor. ) To control the raising / lowering operation of the cage, the opening / closing operation of the cage door, the opening / closing operation of the landing door, and the like.

  The hall sensor 61 is provided on one side of the hoistway where the car and the car go up and down. The hall sensor 61 detects whether or not the cage exists in the hall by projecting light to a detected body provided on the other side of the car and the hoistway and receiving reflected light from the detected body. Then, it is detected whether the basket is landing on the landing. The hall sensor 61 outputs a signal indicating whether or not the cage exists in the hall to the control device 60. In addition, you may output the signal showing whether a cage | basket exists in a landing zone by another method to a control apparatus. For example, a landing switch may be provided on the side of the cage, and a landing plate may be provided in the landing zone on each floor in the hoistway. The landing switch may be turned on based on the contact of the landing switch with the test plate, and a signal indicating that the car exists in the landing zone based on the turning on of the landing switch. It may be output to the control device. Alternatively, a landing plate may be provided on the side of the cage, and a landing switch may be provided in the landing zone on each floor in the hoistway. The landing switch may be turned on based on the contact of the landing switch existing in the landing zone of any floor with the landing plate, and based on the turning on of the landing switch. A signal may be output to the control device indicating that the car is in a landing zone on a specific floor.

  When the control device 60 determines that the car is in the basket-existing state based on the signal from the hall sensor 61, the control device 60 outputs a control signal for closing the switch part 35 to the switch part 35. Then, a current that causes repulsive force flows between the electromagnet 21 and the permanent magnet 22 through the coil 31. On the other hand, if the control device 60 determines that the car is not in the landing zone based on the signal from the landing sensor 61, the control device 60 outputs a control signal for opening the switching part 35 to the switch part 35. Then, an electric current does not flow into the coil 31, an attractive force acts between the iron core 32 of the electromagnet 21 and the permanent magnet 22, and the electromagnet 21 and the permanent magnet 22 are fixed by magnetic force.

  In the above configuration, the landing door device 10 operates as follows. Specifically, a maintenance worker or the like inserts a key (not shown) from the landing side into a key insertion portion 65 (see FIG. 1) provided on the landing side of the landing door 2 for maintenance inspection and the like. It is assumed that a known lock mechanism (not shown) that prevents the door 2 from being manually opened is manually released and the landing door 2 is manually opened. At this time, if the cage exists in the landing zone and has landed on the landing, the controller 60 causes the coil 31 to pass a current that causes a repulsive force between the electromagnet 21 and the permanent magnet 22. As shown in FIG. 4, one of the opening side doors 2a is moved from the right side to the left side in the direction indicated by arrow A1, and the other opening side door 2b is indicated by arrow A2. Move from left to right on the page in the direction. Therefore, the maintenance worker or the like can move into the basket without any trouble.

  On the other hand, if the cage does not exist in the landing zone and has not landed on the landing zone, the control device 60 does not pass current through the coil 31, so the electromagnet 21 and the permanent magnet 22 are fixed by magnetic force. Therefore, as shown in FIG. 5, as the landing door 2 is opened, the permanent magnet 22 fixed to the electromagnet 21 moves in the direction of the arrow A1 together with the one opening side door 2a that moves in the direction of the arrow A1. . As a result, the barricade rope 23 having one end fixed to the permanent magnet 22 is pulled out from the rope winder 24 in the direction indicated by the arrow A1 in the X direction, and the opening generated when the landing door 2 is opened is It crosses in the X direction from the opening side door 2a to the other opening side door 2b.

  According to the above embodiment, when the control device 60 determines that the cage does not exist in the landing zone based on the signal from the landing sensor 61, the electromagnet 21 and the permanent magnet 22 flow through the coil 31 so as to attract each other by magnetic force. Control the current. In that case, when the landing door 2 is manually opened, the barricade rope 23 fixed to the permanent magnet 22 is opened when the landing door 2 is opened based on the fixation by the magnetic force between the electromagnet 21 and the permanent magnet 22. It extends between a pair of opening side doors 2a and 2b so that the opening which arises may be crossed to a X direction. Therefore, when the landing door 2 is opened when there is no basket, the presence of the barricade rope 23 pulled out can alert the maintenance worker and the like that there is no basket. When trying to move to Y, a force in the Y direction from the barricade rope 23 to the landing side (opposite the hoistway side) can be applied to the user. Therefore, it is possible to prevent the user from falling into the hoistway from the opening after the landing door 2 is manually opened by the barricade rope 23.

  In general, when a permanent magnet is used, a stronger magnetic force is easily generated than when an electromagnet is used. Therefore, the permanent magnet 22 is fixed to the iron core 32 with a strong magnetic force when the cage is not present in the landing zone. Therefore, it can prevent substantially that the permanent magnet 22 remove | deviates from the iron core 32, and it can prevent reliably that the user who tried to move to the hoistway side with the barricade rope 23 crossing opening has fallen to the hoistway.

  Moreover, since the rope winder 24 which winds up the barricade rope 23 is attached to the opening side door 2b, the accommodation space of the barricade rope 23 can be made small, and the landing door apparatus 10 can be comprised compactly. Further, when the barricade rope 23 is pulled out from the rope winder 24, a force for pulling the barricade rope 23 into the rope winder 24 is exerted by the biasing force applied by the mainspring. Therefore, when the barricade rope 23 is no longer needed, the barricade rope 23 can be automatically rope-wrapped 24 so that maintenance and inspection can be performed smoothly.

  Furthermore, when the landing door device 10 includes the upper landing door device 20 and the lower landing door device 40 and there is no basket, the two barricade ropes 23 are spaced from each other in the Z direction. Cross the opening created by the opening action. Therefore, it is possible to more reliably prevent a user such as a maintenance worker from falling on the hoistway.

  The present invention is not limited to the above-described embodiment and its modifications, and various improvements and modifications can be made within the matters described in the claims of the present application and their equivalent ranges.

  For example, in the above embodiment, the barricade rope 23 is pulled out from the rope winder 24 by configuring the magnetic body member with the permanent magnet 22 and not passing an electric current through the electromagnet 21 when the cage is not present at the landing. However, if the magnetic member is made of a magnetic material such as iron that is not a permanent magnet, and the control device determines that there is no cage, an electromagnet and a magnetic member (not a permanent magnet) are caused by passing a current through the coil. An attractive force may be exerted between the magnetic body and the like. On the contrary, if the control device determines that the basket is present, the electromagnet may be prevented from generating a magnetic force by preventing the current from flowing through the coil. It is possible to prevent the force from working during the period.

  Generally, when the elevator is driven, the time during which the cage is stopped in the landing zone is longer than the time during which the cage is moving up and down the hoistway. According to this modified example, no current flows through the coil when the cage is in the caged state where the cage is stopped in the landing zone. Therefore, in comparison with a configuration in which a current flows through the coil when the cage is stopped in the landing zone, the time during which the current flows through the coil can be shortened, and the running cost can be reduced.

  Moreover, the landing door device may further include an operation unit that causes the control device to perform a control in which an attractive force does not act between the electromagnet and the magnetic member. When a maintenance worker gets on the cage to perform maintenance, or goes down to the pit below the hoistway to perform maintenance, the maintenance worker goes up and down across the opening even if the cage is not in the landing zone. It is necessary to move to the roadside. In such a case, the barricade rope drawn out from the rope winder and crossing the opening may obstruct the passage of the opening of a maintenance worker or the like, which may hinder smooth maintenance inspection.

  On the other hand, for example, as shown in FIG. 6, a connector 77 of a cable 76 connected to the control device may be accommodated on the back side of the operation panel 80 on which the landing button 55 is installed. In this case, it is preferable that the landing door device 10 includes a maintenance unit 90 as an operation unit provided with a touch panel and a button for causing the control device to perform control in which no attractive force acts between the electromagnet and the magnetic member. Then, for example, it is preferable that the maintenance unit 90 can be connected to the connector 77 by removing the display unit of the operation panel, and a maintenance worker or the like can draw an attractive force between the electromagnet and the magnetic member via the maintenance unit 90 to the control device. It is preferable to output a signal that makes control that does not work.

  According to this modification, the control unit can control the maintenance unit 90 so that no attractive force acts between the electromagnet and the magnetic member. Therefore, the electromagnet can be easily separated from the magnetic member during maintenance on the basket or maintenance on the pit, and the maintenance can be performed smoothly. The operation unit may be configured by a button or the like disposed in a state connected to a cable on the back side of the operation panel on which the landing button is installed, and can output a control signal to the control device via the cable. It may be configured.

  Moreover, although the case where the rope winder 24 as the string winder is present has been described, the string winder may not be present, and the string member may be simply housed in a box-shaped housing portion or the like. Moreover, when the landing door apparatus 10 includes the upper landing door apparatus 20 and the lower landing door apparatus 40, and there is no cage, the two barricade ropes 23 have openings that are generated when the landing door 2 is opened. Although the case where it crossed in the X direction was demonstrated, the structure which crosses the opening produced when one or three or more string members open a landing door in the X direction may be sufficient.

  In addition, when the landing door 2 is opened, including two opening-side doors 2a and 2b that move in opposite directions, and when the landing door 2 is opened, an opening is generated between the two opening-side doors 2a and 2b. It demonstrated and demonstrated the case where a pair of door opening side opposing part was a pair of opening side door 2a, 2b. However, when the landing door is opened, the plurality of doors may all move in the same direction, and an opening may be formed between the opening-side door positioned on the opening side and the wall portion of the landing. An opposing part may be comprised by the wall part of an opening side door and a landing. And an electromagnet may be attached to one side of an opening side door and a wall part of a hall, and a magnetic body member may be attached to the other of the opening side door and the wall part of a hall. Moreover, although the case where the landing door 2 was comprised by two doors 2a and 2b was demonstrated, the landing door may be comprised by any number of one or more.

  Moreover, although the barricade rope 23 demonstrated the case where the height of the circumference | surroundings of an adult male's chest (above waist) was crossed in the X direction, the string member may cross any height. Moreover, although the barricade rope 23 as a string member is formed by twisting at least one of a fiber and a steel wire, the string member may be a long metal member or the like used for a tape measure. Good.

  Further, the case where the magnetic material (permanent magnet 22) is one member to which the barricade rope 23 is fixed and is attached to the opening side door 2b so as to be relatively movable in the X direction with respect to the opening side door 2b has been described. . However, the electromagnet is one member to which the string member is fixed, and may be attached to the opening side door or the landing wall so as to be relatively movable in the X direction with respect to the opening side door or the landing wall portion. Moreover, although the electromagnet 21 has the iron core 32 and the coil 31 wound around the iron core 32, the core material of the electromagnet does not have to be the iron core 32, and is made of a magnetic material other than iron. A core material may be used. Alternatively, the electromagnet may not include a core material. In addition, the same mechanism as a seat belt pulling device equipped with a ratchet mechanism or the like employed in an automobile or the like may be used so that the string member cannot be pulled out from the string winder when the string member is pulled out suddenly. . In this way, when the string member is pulled out suddenly, a large opening through which a person can pass may be prevented to ensure high safety.

  DESCRIPTION OF SYMBOLS 1 Elevator, 2 landing doors, 2a, 2b Opening side door, 20 Upper landing door device, 21 Electromagnet, 22 Permanent magnet, 23 Barricade rope, 24 Rope winder, 40 Lower landing door device, 60 Control device, 61 landing Sensor, 90 Maintenance unit, X direction Moving direction of landing door.

Claims (6)

A landing door device that operates when manually opening the landing door by manually releasing a lock mechanism that prevents the elevator landing door from being manually opened,
An electromagnet attached to one of a pair of door opening side facing portions facing each other in the moving direction of the landing door across an opening generated when the landing door is opened;
A magnetic body member made of a magnetic material and attached to the other of the pair of door opening side facing portions so as to face the electromagnet in the moving direction;
A string member having one end fixed to one of the electromagnet and the magnetic member;
A hall sensor that detects whether the basket is in the hall,
Based on a signal from the landing sensor, if it is determined that the cage is in the cage zone existing in the landing zone, a current that flows through the electromagnet so that no attractive force acts between the electromagnet and the magnetic member. A controller that controls the current flowing through the electromagnet so that the electromagnet and the magnetic member attract each other when it is determined that the car is in a cage-free state that does not exist in the landing zone. Prepared,
The one member is movable in the moving direction with respect to the door opening side facing portion to which the one member is attached,
When the landing door is manually opened in a state where the electromagnet and the magnetic member are attracted to each other, the pair of door opening side facing portions so that the string member crosses the opening in the moving direction. and extending between,
When the string member extends across the opening in the moving direction, the electromagnet and the magnetic member are in contact with each other, and the one end of the string member is fixed. A landing door device that moves in the moving direction as the one member moves in the moving direction . The landing door device according to claim 1,
The magnetic member is a permanent magnet,
When the control device determines that the cage is not in the state, the electromagnet and the magnetic member are attracted to each other by preventing current from flowing through the electromagnet, while the cage is in the state with the cage. If it judges that, it is the landing door apparatus which sends the electric current which a repulsive force acts between the said permanent magnet and the said electromagnet to the said electromagnet. The landing door device according to claim 1,
The magnetic member is a magnetic body that is not a permanent magnet,
When the control device determines that the cage is not present, the electromagnet and the magnetic member are attracted to each other by passing a current through the electromagnet, while determining that the cage is present. A landing door device that prevents a force from acting between the electromagnet and the magnetic member by preventing current from flowing through the electromagnet. In the landing door apparatus as described in any one of Claims 1 thru | or 3,
A landing door device in which a string winder for winding the string member is attached to the door opening side facing part to which the one member is attached. In the landing door apparatus as described in any one of Claims 1 thru | or 4,
A landing door device further comprising an operation unit that causes the control device to perform control such that no attractive force acts between the electromagnet and the magnetic member. In the landing door apparatus as described in any one of Claims 1 thru | or 5,
A plurality of electromagnets, a plurality of magnetic members, and a plurality of string members;
When the landing door is manually opened in the state without the basket, the landing door device crosses the opening in the moving direction with the plurality of string members spaced apart from each other in the height direction.

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