JPH08143254A - Door close confirmation device for elevator car door - Google Patents

Abstract

PURPOSE: To provide a door close confirmation device for an elevator car door which is not affected by vibration during operation of the car. CONSTITUTION: A roller 4a for engaging with an operation piece 5 which is mounted on a car door 1 is attached to one side of the first arm 11a of a rotor 11 rotatably provided to a switch main body 10 around a horizontal shaft 12 and a magnet 14 is attached to the other side. A movable contact 17 is attached to the end of the second arm 11b in such a state as opposed to a fixed contact 20. An electromagnet 13 is arranged in a switch main body 10 in such a state as opposed to the magnet 14. An optical receiver 2 and a light emission device 23 for detecting a door close state of the car door 1 are arranged in the switch main body 10 and the car door 1 respectively and the electromagnet 13 is exited in the door closed state so as to attract the magnet 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door closing confirmation device for an elevator car door, and more specifically, to operate a car while a person or an object is sandwiched between the car door and a car front pillar. The present invention relates to a door closing confirmation device for an elevator car door for preventing a canning failure caused by.

[0002]

2. Description of the Related Art FIG. 11 shows, for example, JP-A-6-156956.
FIG. 12 is a front view showing a conventional elevator car door confirmation device described in Japanese Patent Publication, FIG. 12 is a front view for explaining the operation of the conventional elevator car door confirmation device, and in FIG. A car door that is hung on a rail and moves to the left and right in FIG. 11 to open and close the doorway of a car. 2 is an upper frame that is a fixed part of the car. 3 is a front pillar of the car. 1 is in contact with the front pillar 3. 4 is upper frame 2
The switch 5 attached to the upper part of the car door 1 is attached to the upper end of the car door 1 via the operating piece mounting plate 6, and the switch 4 is operated by pushing up the roller 4a of the switch 4 by the opening / closing operation of the car door 1. The operation piece 5 is attached to the operation piece attachment plate 6 by inserting the engagement shaft 5a into the operation piece attachment plate 6 and the elongated hole 6a extending in the opening / closing direction of the car door 1. Relative to the plate 6 is not displaced in the vertical direction, and can be slid in the horizontal direction within a predetermined range (about 0 to 7 mm). A mountain portion 5b is formed at the upper end of the operating piece 5, and a protrusion 5c is formed on the door closing side of the mountain portion 5b. Reference numeral 7 denotes a spring attached to the operating piece mounting plate 6, and the spring 7 acts on the rod 5d attached to the operating piece 5 in the door opening direction (leftward direction in FIG. 11).

Next, the operation of the conventional car door closing confirmation device will be described. When the car door 1 is moving in the closing direction, the rod 5a of the operating piece 5 is pulled by the spring 7 and the engaging shaft 5a is in contact with the end of the slot 6a on the door opening side, that is, the operating piece. It is in a state of being flush with the one-sided mounting plate 6 (a portion in FIG. 11). Then, when the car door 1 moves further in the closing direction, first, the roller 4a of the switch 4
Touches the end of the chevron 5b of the actuating piece 5 and is pushed up along the shape of the chevron 5b until the switch 4 is actuated over the protrusion 5c as shown in FIG. Further, the car door 1 moves in the closing direction and finally comes into contact with the front pillar 3 to be in a completely closed state. At this time, the operation circuit of the elevator is established by the operation of the switch 4, and the car is operated. Therefore, the size of the gap between the car door 1 and the front pillar 3 is extremely small (3 to 5 mm) so that the car does not start moving when a person or an object is sandwiched between the car door 1 and the front pillar 3. The switch 4 is set to be actuated when it reaches about (4).

Further, when the car door 1 is moved in the opening direction due to vibration or the like while the car is in operation, as shown in FIG. 12, the protrusion 5c of the operating piece 5 is the roller 4a of the switch 4.
Since it acts as a stopper when it hits, the operating piece 5 does not move, the car door 1 and the operating piece mounting plate 6 move against the urging force of the spring 7, and the operating piece 5 and the operating piece mounting plate 6 are displaced from each other. It will be in a closed state (part B in FIG. 12). Therefore, even if the car door 1 is slightly opened due to vibration or the like, the operating piece 5 does not move and the switch 4 is not cut off. For this reason, the elevator operation circuit remains established, and the car does not stop at an intermediate floor. When the car door 1 is opened beyond the range in which the operating piece 5 can slide with respect to the operating piece mounting plate 6, the engagement shaft 5a comes into contact with the end of the elongated hole 6a on the door closing side, and the operating piece Since 5 moves in synchronism with the operating piece mounting plate 6 and the car door 1, the roller 4a goes over the protrusion 5c and separates from the chevron portion 5b, and the switch 4 is shut off. Then, the operation circuit of the elevator is not established and the car is immediately stopped.

[0005]

DISCLOSURE OF THE INVENTION The conventional door-closing confirmation device for an elevator car door is constructed as described above.
When the car door 1 moves due to vibration or the like while the car is operating, the engagement shaft 5a of the operating piece 5 slides in the elongated hole 6a of the operating piece mounting plate 6. Therefore, if foreign matter such as dust has entered the elongated hole 6a, the engaging shaft 5a and the elongated hole 6a
As a result, the engagement shaft 5a and the engagement shaft 5a are firmly fixed to each other, which prevents smooth sliding of the engagement shaft 5a. As a result, there is a problem that even if the car door 1 is slightly moved in the opening direction due to vibration or the like, the switch 4 is cut off and the car is stopped, so that the operation efficiency of the elevator is reduced. Further, since the car is operated in the state where the roller 4a of the switch 4 is in contact with the chevron portion 5b of the operating piece 5, vibration is transmitted to the switch 4 via the operating piece 5 and the roller 4a, and the contact point of the switch 4 There is also a problem that a contact failure occurs and malfunctions occur.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a door closing confirmation device for an elevator car door that is not affected by vibration during operation of the car.

[0007]

The elevator car door closing confirmation device according to the first aspect of the present invention is mounted on a car and has a fixed contact and a movable contact inside to close the door of the car door. A switch main body provided with a switch to be confirmed, and rotatably attached to the switch main body around a horizontal axis. The first arm extending toward the car door and the movable contact were attached so as to face the fixed contact. It is attached to a rotating body having a second arm and a car door, and is movable by rotating the rotating body in one direction around a horizontal axis by engaging with the first arm from the vicinity of the door closing end when the car door is closed. The operating piece that brings the contact into contact with the fixed contact to operate the switch, and the rotating piece that rotates further in one direction to maintain the contact state between the movable contact and the fixed contact while maintaining the contact state between the first arm and the operating piece. A switch holding means for releasing the engagement and a car door When positioned between the door 閉終 end and door 閉終 near edge, in which a driving means of the switch holding means for actuating the switch holding means.

The elevator car door closing confirmation device according to a second aspect of the present invention is the elevator door closing confirmation device according to the first aspect, wherein the rotating body is opposite to the first arm in the opening / closing direction of the car door with respect to the horizontal axis. The third arm is provided on the side so as to engage with the operating piece when the car door is opened beyond the vicinity of the closed end of the door.

An elevator car door confirmation device according to a third aspect of the present invention is the elevator door closing confirmation device according to the first aspect, wherein the switch holding means is a magnet attached to one of the rotating body and the switch body. An electromagnet is provided on the other of the rotating body and the switch body so as to face the magnet.

[0010]

In the first aspect of the present invention, when the car door moves in the closing direction and reaches the vicinity of the terminal end of the door, the operating piece engages with the first arm. When the car door moves further in the closing direction, the operating piece pushes the first arm, the rotating body is rotated in one direction around the horizontal axis, the movable contact comes into contact with the fixed contact, and the switch operates to close the door. Is confirmed. Then, the car door further moves to reach the door closing end. Further, when the car door is located between the door closing end and the vicinity of the door closing end, the drive means actuates the switch holding means and the contact state between the movable contact and the fixed contact is maintained. The engagement between the first arm and the operating piece is released. Therefore, even if the car door moves left and right between the door closing end and the vicinity of the door closing end due to vibration during car operation, the switch operating state is maintained, that is, it is confirmed that the car door is closed. Stopping the car halfway is prevented. At this time, since the engagement between the first arm and the operating piece is released, the vibration of the car door is not transmitted to the rotating body, and the stable contact state between the movable contact and the fixed contact is obtained, and the switch contact Malfunction is prevented.

According to the second aspect of the present invention,
When the car door is opened beyond the vicinity of the closed end of the car during the car operation, the operating piece engages with the third arm to rotate the rotating body in the other direction around the horizontal axis. Then, the movable contact separates from the fixed contact, the operation of the switch is released, and the car is immediately stopped. As a result, the car will not be operated with the car door open.

According to the third aspect of the present invention,
When the car door is located between the door closing end and the vicinity of the door closing end, the drive means excites the electromagnet. Then, the magnet is attracted or repelled by the electromagnet, and the rotating body is rotated around the horizontal axis in one direction. As a result, the engagement between the first arm and the operating piece is released while the contact state between the movable contact and the fixed contact is maintained.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. Example 1. 1 is a front view showing an elevator car door door confirmation device according to a first embodiment of the present invention, and FIG. 2 illustrates an operation of an elevator car door door confirmation device according to a first embodiment of the present invention. It is a front view, and the same code | symbol is attached | subjected to the same or an equivalent part as the conventional door-closing confirmation apparatus for car doors shown in FIG. 11 and FIG.

In the figure, 10 is a switch body mounted on the upper frame 2, 11 is a horizontal shaft 12 on the switch body 10.
The rotating body 11 is rotatably mounted around the rotating body 11. The rotating body 11 is composed of first, second and third arms 11a, 11b and 11c extending outward in the radial direction from the center of rotation in three directions. ing. 13 is an electromagnet attached to the switch body 10, 14 is a magnet fixed to one side of the first arm 11 a so as to face the electromagnet 13, and 15 is a magnet between the switch body 10 and the first arm 11 a. 1 is a spring arranged so as to press the arm 11a of the switch 1 downward, and 16 is a stopper bolt attached to a part of the switch body 10 opposite to the electromagnet 13 in the opening / closing direction of the car door 1 with respect to the horizontal shaft 12. Yes, this stopper bolt 16 is attached to the third arm 11
Rotating body 11 is brought into contact with c by the urging force of spring 15.
In FIG. 1, the clockwise rotation is restricted. Reference numeral 17 is a movable contact that is swingably attached to the end of the second arm 11b by a spring-equipped fixture 18, 19 is an insulating base that is attached to the switch body 10, and 20 is an insulating member that faces the movable contact 17. The fixed contacts are fixed to the base 19 with screws 21. Reference numeral 22 denotes a light receiving device attached to the switch body 10, and 23 denotes a light emitting device attached to the upper end of the car door 1 so as to face the light receiving device 22.
In the sensor composed of the light emitting device 23 and the light emitting device 23, the car door 1 has the front pillar 3
It is configured to be able to detect a state in which the car door 1 is separated from the front pillar 3 by a distance of about 5 mm (near the end of the door closed) to a state in which the car door 1 is in contact with (the end of the door closed).

Here, the movable contact 17 and the fixed contact 20.
The switch is composed of the electromagnet 13, the magnet 14
The spring 15 constitutes a switch holding means, and the sensor including the light receiving device 22 and the light emitting device 23 constitutes a driving means of the switch holding means.

A roller 4a is provided at the other end of the first arm 11a.
Is rotatably attached about a horizontal axis, and an operating piece 5 is attached to the upper end of the car door 1. Then, in a state where the third arm 11c is in contact with the stopper bolt 16, the third arm 11c and the chevron portion of the actuating piece 5 are in a positional relationship of engaging the roller 4a and the chevron portion 5b of the operating piece 5. The movable contact 17 and the fixed contact 20 are separated from each other in a positional relationship with which the movable contact 17 and the fixed contact 20 are separated from each other. Further, when the roller 4a rides on the chevron portion 5b of the operating piece 5, the movable contact 17 comes into contact with the fixed contact 20 and the light receiving device 22 can detect light emitted from the light emitting device 23. It is configured. further,
When the magnet 14 is attracted to the electromagnet 13, the third arm 11c and the chevron portion 5b of the actuating piece 5 are engaged with each other due to the positional relationship in which the roller 4a and the chevron portion 5b of the operating piece 5 are separated from each other. Each of them is configured to have a positional relationship.

Next, the operation of the first embodiment will be described. With the car door 1 open, the spring 15
1 acts to rotate the rotating body 11 clockwise about the horizontal shaft 12 in FIG. 1, and the rotating body 11 is stopped by the third arm 11c contacting the stopper bolt 16. Therefore, the movable contact 17 and the fixed contact 20 are separated from each other, and the elevator operation circuit is not established. Then, when the car door 1 moves in the closing direction, first, the end of the chevron portion 5b of the operating piece 5 contacts the roller 4a, and the roller 4a is pushed up along the shape of the chevron portion 5b. The push-up force acting on the roller 4a causes the rotor 1 to rotate.
1 rotates counterclockwise around the horizontal shaft 12 as the center of rotation against the biasing force of the spring 15. When the roller 4a rides on the chevron portion 5b, the movable contact 17 moves to the fixed contact 2
When the car is in contact with 0, the elevator operation circuit is established and the car is operated. At this time, the door-closing side of the light emitting device 23 is located directly below the light receiving device 22, and the light receiving device 22 detects the light emitted from the light emitting device 23. Electric power is supplied to the electromagnet 13 based on this detection signal, and the magnet 14 causes the electromagnet 1 to move.
3 is sucked. Then, the rotating body 11 is rotated counterclockwise about the horizontal shaft 12 and the roller 4 a is separated from the operating piece 5. Further, the counterclockwise rotation of the rotating body 11 reduces the spring of the spring-equipped fixture 18, and the movable contact 17 is pressed against the fixed contact 20 by the spring force of the spring-equipped fixture 18. Further, the car door 1 moves in the closing direction and finally comes into contact with the front pillar 3 to be in a completely closed state. Then, the light receiving device 22 detects the light emitted from the light emitting device 23 even when the door is completely closed, and the electromagnet 1
The magnet 14 is kept attracted by the magnet 14.
Therefore, the elevator operating circuit is set to be established when the gap between the car door 1 and the front pillar 3 becomes extremely small (about 5 mm), so that the car door 1 and the front pillar 3 are separated from each other. The car will not start moving with people or objects sandwiched between them.

Further, when the car door 1 is moved slightly to the left or right (within 5 mm) within the operating range of the sensor in the direction in which the car door 1 is opened due to vibration or the like while the car is operating, the light emitted from the light emitting device 23 is emitted. The light is received by the light receiving device 22, the magnet 14 is attracted by the electromagnet 13, and the chevron portion 5 b of the operating piece 5 is attracted.
Since the roller 4a and the roller 4a are separated from each other, the movable contact 17 and the fixed contact 20 are kept in contact with each other, the operation circuit of the elevator is still established, and the car does not stop on the intermediate floor. Absent. When the car door 1 is opened beyond the operating range (about 5 mm) of the sensor, the light receiving device 22
Cannot detect the light emitted from the light emitting device 23,
The supply of electric power to the electromagnet 13 is stopped. Therefore, the attraction force of the electromagnet 13 is lost, and the rotating body 11 moves to the spring 1
It is rotated clockwise about the horizontal shaft 12 by the urging force of 5. At this time, the operating piece 5 has reached a position where it does not engage with the roller 4a, the movable contact 17 separates from the fixed contact 20, the operating circuit of the elevator is no longer established, and the car is immediately stopped. Therefore, the operation of the car with the car door 1 opened is prevented.

Further, when the car is operated with the car door 1 closed, a shield is inserted between the light receiving device 22 and the light emitting device 23 for some reason, and the magnet 14 of the electromagnet 13 acts as a shield. The suction may be released. However, when the rotating body 11 rotates clockwise, the roller 4
a is in contact with the chevron portion 5b of the operating piece 5, the contact state between the movable contact 17 and the fixed contact 20 is maintained, the operating circuit of the elevator remains established, and the car stops at an intermediate floor. There is no. In addition, the light emitting device 2 is caused for some reason.
The car door 1 may be opened while the light detection state of the car door 2 is set. However, the movement of the car door 1 causes the operating piece 5 to hit the third arm 11c, forcibly rotating the rotating body 11 clockwise about the horizontal shaft 12.
Therefore, the movable contact 17 separates from the fixed contact 20, the elevator operating circuit is not established, and the car is immediately stopped. Therefore, the operation of the car with the car door 1 opened is prevented.

As described above, according to the first embodiment, the car door 1 is in contact with the front pillar 3 (door closed end) and is separated from the front pillar 3 by about 5 mm (near the door closed end). When located in between, the electromagnet 13 is excited and the magnet 14
, And the movable contact 17 is in contact with the fixed contact 20, the roller 4a separates from the chevron portion 5b of the operating piece 5, so that the vibration generated during the operation of the car rotates through the car door 1. Since it is not transmitted to the body 11 and the contact between the movable contact 17 and the fixed contact 20 is not worn or bound due to vibration, occurrence of malfunction due to poor contact is prevented. In addition, when the car door 1 slightly moves in the opening direction due to vibration or the like, the movable contact 17
The contact state between the fixed contact 20 and the fixed contact 20 is maintained, and the car does not stop, so that the reduction in the operation efficiency of the elevator is suppressed. When the car door 1 is opened beyond the vicinity of the terminal end of the door, the electromagnet 13 is immediately deenergized and the movable contact 1
7 separates from the fixed contact 20, and the operation of the car is stopped. Therefore, the car is not operated with the car door 1 open. Furthermore, when the car door 1 is opened beyond the vicinity of the door closing end, the actuating piece 5 pushes up the third arm 11c and the movable contact 17 is fixed even if the excitation of the electromagnet 13 is not released for some reason. The car can be stopped by moving away from the contact 20.

Example 2. 3 is a front view showing an elevator car door closing confirmation device according to a second embodiment of the present invention, and FIG. 4 illustrates an operation of the elevator car door closing confirmation device according to a second embodiment of the present invention. FIG. 2 is a front view, in which 25 is an electromagnet provided on the switch body 10 so as to face the arm end of the third arm 11c, and 26 is an electromagnet 25 projecting to the third arm 11c side to project the third arm 11c. Is an actuator that rotates counterclockwise in the figure with the horizontal axis 12 as the center of rotation. The second embodiment has the same configuration as that of the first embodiment except that the electromagnet 25, the actuator 26, and the spring 15 constitute a switch holding means.

In the second embodiment, when the car door 1 is moved in the closing direction, first, the end of the chevron portion 5b of the operating piece 5 is moved to the roller 4a.
, And the roller 4a is pushed up along the shape of the chevron portion 5b. The pushing force acting on the roller 4a causes the rotating body 11 to rotate counterclockwise about the horizontal shaft 12 against the biasing force of the spring 15. When the roller 4a rides on the chevron portion 5b, the movable contact 1
7 contacts the fixed contact 20, the operation circuit of the elevator is established, and the car is operated. At this time, the door-closing side of the light emitting device 23 is located directly below the light receiving device 22, and the light receiving device 22 detects the light emitted from the light emitting device 23. Based on this detection signal, the electromagnet 25 is supplied with power and excited. Then, the actuator 26 projects and the third arm 1
Press 1c. Therefore, as shown in FIG. 4, the rotating body 11 is rotated counterclockwise around the horizontal shaft 12 as the center of rotation, and the roller 4 a is separated from the operating piece 5. Further, the car door 1 moves in the closing direction and finally comes into contact with the front pillar 3 to be in a completely closed state. Then, the light receiving device 22 detects the light emitted from the light emitting device 23 even when the door is completely closed, and the electromagnet 25 is excited to maintain the protruding state of the actuator 26. Therefore, also in the second embodiment, the same effect as that of the first embodiment can be obtained.

Example 3. 5 is a front view showing an elevator car door door closing confirmation device according to a third embodiment of the present invention, and FIG. 6 illustrates an operation of an elevator car door door confirmation device according to a third embodiment of the present invention. It is a front view. In the third embodiment, the switch body 10 is provided with the electromagnet 13 facing the arm end of the third arm 11c, and the electromagnet 13 is provided on the third arm 11c.
The magnet 14 is provided to face the first arm 11 and
A spring 15 is contracted between a and the switch body 10 to form a switch holding means. The other structure is the same as that of the second embodiment.

According to the third embodiment, when the car door 1 is located in the light receiving range of the light receiving device 22, that is, between the door closing end and the vicinity of the door closing end, the electromagnet 13 is excited and the magnet 14 is activated. Be repulsed. Therefore, the rotating body 11 is shown in FIG.
As shown in FIG. 3, the roller 4 a is rotated counterclockwise about the horizontal shaft 12 to separate the roller 4 a from the operating piece 5. Therefore, also in the third embodiment, the same effect as in the second embodiment can be obtained.

Example 4. FIG. 7 is a front view showing an elevator car door door confirmation device according to a fourth embodiment of the present invention, and FIG. 8 illustrates an operation of an elevator car door door confirmation device according to a fourth embodiment of the present invention. It is a front view. In the fourth embodiment, a cylinder 27 is provided on the switch body 10 so as to face the arm end of the third arm 11c, a plunger 28 is provided so as to be retractable from the cylinder 27, and the plunger 2 is provided.
Bag 29, air pump 30, and first for moving the container 8 in and out
The switch holding means is composed of the arm 11a and the spring 15 that is contracted between the switch main body 10. The other structure is the same as that of the second embodiment.

According to the fourth embodiment, when the car door 1 is located in the light receiving range of the light receiving device 22, that is, between the door closing end and the vicinity of the door closing end, the air pump 30 is operated and the bag 29 is operated. Is enlarged and the plunger 28 is projected from the cylinder 27. Therefore, as shown in FIG. 8, the rotating body 11 is rotated counterclockwise about the horizontal shaft 12 and the roller 4 a is separated from the operating piece 5. Therefore,
Also in the fourth embodiment, the same effect as in the second embodiment can be obtained.

Example 5. FIG. 9 is a front view showing an elevator car door door confirmation device according to a fifth embodiment of the present invention, and FIG. 10 illustrates an operation of an elevator car door door confirmation device according to a fifth embodiment of the present invention. It is a front view. In the fifth embodiment, a cylinder 27 is provided on the switch body 10 so as to face the arm end of the third arm 11c, a plunger 28 is provided so as to be retractable from the cylinder 27, and an oil pump for moving the plunger 28 in and out. 31 and the first arm 11a and the spring 15 contracted between the switch body 10 constitute a switch holding means. In addition,
The other structure is the same as that of the fourth embodiment.

According to the fifth embodiment, when the car door 1 is located in the light receiving range of the light receiving device 22, that is, between the door closing end and the vicinity of the door closing end, the oil pump 31 is operated to operate the cylinder 27. The oil 32 is press-fitted therein, and the plunger 28 is projected from the cylinder 27. Therefore, the rotating body 1
As shown in FIG. 10, 1 is rotated counterclockwise about the horizontal shaft 12 to separate the roller 4 a from the operating piece 5. Therefore, also in the fifth embodiment, the same effect as in the fourth embodiment can be obtained.

[0029]

Since the present invention is constituted as described above, it has the following effects.

According to the first aspect of the present invention, there is provided a switch main body, which is attached to the car and internally provided with the switch for confirming the door closing of the car door, which is composed of the fixed contact and the movable contact, and the switch main body. Attached to a car door, which has a first arm extending rotatably around a horizontal axis and having a first arm extending to the car door side, and a second arm attached so that the movable contact faces the fixed contact. And an operating piece that engages with the first arm from the vicinity of the door closing end to rotate the rotating body in one direction around the horizontal axis to bring the movable contact into contact with the fixed contact to operate the switch when the car door is closed. And a switch holding means for further rotating the rotating body in one direction to release the engagement between the first arm and the operating piece while maintaining the contact state between the movable contact and the fixed contact, and the car door is closed. When located between the end and near the end of the door Since the car holding device is provided between the door closing end and the vicinity of the door closing end, the first arm and the operating piece are provided. A door closing confirmation device for an elevator car door that is disengaged so that the vibration of the car door is not transmitted to the rotating body and is not affected by the vibration during operation of the car is obtained.

According to a second aspect of the present invention, the first aspect
In the invention of claim 1, the rotating body is extended to the side opposite to the first arm in the opening / closing direction of the car door with respect to the horizontal axis so as to engage with the operating piece when the car door is opened beyond the vicinity of the door closing end. Since it has the third arm extended, if the car door is opened beyond the vicinity of the closed end of the door for some reason while the car is in operation, the car operation is immediately stopped and the car door is opened. It is possible to reliably prevent the car from being operated in a closed state.

According to a third aspect of the present invention, the first aspect
In the invention, the switch holding means includes a magnet attached to one of the rotating body and the switch body, and an electromagnet attached to the other of the rotating body and the switch body so as to face the magnet. The switch maintenance means can be configured with various configurations.

[Brief description of drawings]

FIG. 1 is a front view showing an elevator car door confirmation device according to a first embodiment of the present invention.

FIG. 2 is a front view illustrating the operation of the elevator car door confirmation device according to the first embodiment of the present invention.

FIG. 3 is a front view showing a car door confirmation device for an elevator according to a second embodiment of the present invention.

FIG. 4 is a front view for explaining the operation of the elevator car door confirmation device according to the second embodiment of the present invention.

FIG. 5 is a front view showing an elevator car door confirmation device according to a third embodiment of the present invention.

FIG. 6 is a front view for explaining the operation of the elevator car door confirmation device according to the third embodiment of the present invention.

FIG. 7 is a front view showing a car door confirmation device for an elevator according to a fourth embodiment of the present invention.

FIG. 8 is a front view for explaining the operation of the elevator car door confirmation device according to the fourth embodiment of the present invention.

FIG. 9 is a front view showing an elevator car door confirmation device according to a fifth embodiment of the present invention.

FIG. 10 is a front view for explaining the operation of the elevator car door confirmation device according to the fifth embodiment of the present invention.

FIG. 11 is a front view showing a conventional car door closing confirmation device for an elevator.

FIG. 12 is a front view illustrating the operation of the conventional car door close confirmation device for an elevator.

[Explanation of symbols]

1 car door, 5 operating pieces, 10 switch body, 11
Rotating body, 11a first arm, 11b second arm, 11c
Third arm, 12 horizontal axis, 13 electromagnet (switch holding means), 14 magnet (switch holding means), 1
5 spring (switch holding means), 17 movable contact (switch), 20 fixed contact (switch), 22 light receiving device (switch holding means driving means), 23 light emitting device (switch holding means driving means), 25 electromagnet (switch) Holding means), 26 actuator (switch holding means), 27 cylinder (switch holding means), 28
Plunger (switch holding means), 29 bags (switch holding means), 30 air pump (switch holding means),
31 Oil pump (switch holding means).

Claims (3)

[Claims] 1. A switch main body mounted on a car and having a switch for confirming door closing of a car door, which is composed of a fixed contact and a movable contact, and a switch main body mounted rotatably around a horizontal axis. A rotating body having a first arm extending to the car door side and a second arm attached so that the movable contact faces the fixed contact; and the car door attached to the car door. Is engaged with the first arm from the vicinity of the end of the door to rotate the rotating body in one direction around the horizontal axis to bring the movable contact into contact with the fixed contact to operate the switch. Switch holding means for further rotating the operating piece and the rotating body in one direction to release the engagement between the first arm and the operating piece while maintaining the contact state between the movable contact and the fixed contact. And the car door is closed And a door closing confirmation device for a car door of an elevator, comprising: a drive means of a switch holding means for activating the switch holding means when located between the door closing end and the vicinity of the door closing end. 2. The rotating body engages with the operating piece on the side opposite to the first arm in the opening / closing direction of the car door with respect to the horizontal axis when the car door is opened beyond the vicinity of the door closing end. When the car door is opened beyond the vicinity of the closing end of the door, the operating piece engages with the third arm to move the rotary body around the horizontal axis. 2. A door closing confirmation device for an elevator car door according to claim 1, wherein the switch is released by rotating the movable contact and the fixed contact in the other direction to separate them from each other. 3. The switch holding means includes a magnet attached to one of the rotating body and the switch body, and an electromagnet attached to the other of the rotating body and the switch body so as to face the magnet. The door closing confirmation device for an elevator car door according to claim 1, wherein: