WO2013046364A1

WO2013046364A1 - Elevator safety device

Info

Publication number: WO2013046364A1
Application number: PCT/JP2011/072217
Authority: WO
Inventors: 雅彦纐纈
Original assignee: 三菱電機株式会社
Priority date: 2011-09-28
Filing date: 2011-09-28
Publication date: 2013-04-04
Also published as: CN103827012B; CN103827012A; JPWO2013046364A1; JP5668865B2; DE112011105684T5; DE112011105684B4

Abstract

Provided is an elevator safety device with which it is possible to reliably detect that a landing door is open in a state other than a regular state. To this end, an elevator safety device is configured to comprise: a plurality of landing door opening detector units which are disposed corresponding to each landing door which is disposed at each elevator landing; a car door opening detector unit which detects the commencement of the car door which is disposed on the elevator car being disengaged; a landing detector unit which detects that the car has landed at each landing; and a determination unit which, when determining which of the landing doors has been disengaged on the basis of the state which is detected by the landing door opening detector units, makes active the result of the detection by the landing door opening detector unit of the landing at which the car lands when the elevator door has not commenced disengaging, and makes inactive the result of the detection by the landing door opening detector unit of the landing at which the car lands when the elevator door has commenced disengaging.

Description

Elevator safety device

This invention relates to an elevator safety device.

As a safety device for elevators, a safety circuit is proposed that shuts off the safety circuit when the landing door is opened in conjunction with the car door after the car has landed on one of the landings. According to this safety device, when the landing door is opened, the hoisting machine is not driven (see, for example, Patent Document 1).

However, if the landing door of the landing floor where the car is landing is open, it cannot be determined that the landing door is open at another landing.

Also, as an elevator safety device, an elevator in which a plurality of cars travels has been proposed that maintains a short circuit of the safety circuit even if the landing door is opened at the landing floor where the car has landed. According to this safety device, even if a landing door is opened at one of the landings after one of the cars has landed on the landing, the traveling of the other cars is not hindered (see, for example, Patent Document 2). .

Japanese Unexamined Patent Publication No. 61-169487 Japanese Patent No. 4190626

However, the safety circuit is momentarily shorted as the car passes through each landing. Even if the landing door is opened at this moment, the safety circuit does not operate. In addition, the safety circuit does not operate even if the landing door is opened when the car door is not open at the landing where the car is landing.

This invention was made in order to solve the above-mentioned subject, The objective is to provide the safety device of the elevator which can detect reliably that the landing door opened in the situation different from usual. is there.

The elevator safety device according to the present invention is provided corresponding to each landing door provided at each landing of the elevator, and includes a plurality of landing door detection units for detecting the opening of each landing door, and the elevator car. A car door opening detection unit that detects the start of the opening of the car door, a landing detection unit that detects that the car has landed on each landing, and a detection state of the landing door opening detection unit When it is determined that one of the landing doors is opened based on the detection result of the landing door opening detection unit of the landing floor where the car is landing when the opening of the car door is not started. And a determination unit that invalidates a detection result of a landing door opening detection unit of a landing on which the car is landing when opening of the car door is started.

According to the present invention, it is possible to reliably detect that the landing door is opened in a situation different from the normal situation.

It is a block diagram of the elevator in which the elevator safety device in Embodiment 1 of this invention is utilized. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of an elevator landing door device and a car door device in which an elevator safety device according to Embodiment 1 of the present invention is used. BRIEF DESCRIPTION OF THE DRAWINGS It is a side view of the basic composition of the elevator landing door apparatus and car door apparatus in which the elevator safety device in Embodiment 1 of this invention is utilized. BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the principal part of the elevator landing door apparatus in which the elevator safety device in Embodiment 1 of this invention is utilized. BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the principal part of the elevator landing door apparatus in which the elevator safety device in Embodiment 1 of this invention is utilized. 1 is a circuit diagram of an elevator safety device according to Embodiment 1 of the present invention. It is a figure for demonstrating the signal of the safety device of the elevator in Embodiment 1 of this invention. It is a figure for demonstrating the signal of the safety device of the elevator in Embodiment 1 of this invention. It is a flowchart for demonstrating operation | movement of the elevator after operation | movement of the elevator safety device in Embodiment 1 of this invention. It is a front view of the elevator landing door apparatus by which the safety device of the elevator in Embodiment 2 of this invention is utilized. It is a front view of the elevator landing door apparatus by which the elevator safety device in Embodiment 3 of this invention is utilized. It is a circuit diagram of the safety device of the elevator in Embodiment 3 of this invention.

DETAILED DESCRIPTION Embodiments for carrying out the present invention will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram of an elevator in which the elevator safety device according to Embodiment 1 of the present invention is used.

In FIG. 1, reference numeral 1 denotes a hoistway that is commonly used by a plurality of elevators. A landing 2 is provided in front of the hoistway on each floor. A landing door 3 is provided at the entrance of each landing 2. An interlock device 4 is provided on the side of the hoistway 1 above each landing door 3. A plate 5 is provided on the wall of the hoistway 1 corresponding to each floor.

In the upper part of the hoistway 1, a first hoisting machine 6a and a second hoisting machine 6b are provided. A first main rope 7a and a second main rope 7b are wound around the first hoisting machine 6a and the second hoisting machine 6b, respectively. A first car 8a and a second car 8b are connected to the end of the first main rope 7a and the end of the second main rope 7b, respectively. The first car 8 a and the second car 8 b are arranged side by side in the vertical direction in the hoistway 1.

A car door 9 is provided on the hall 2 side of the first car 8a and the hall 2 side of the second car 8b. A car engaging plate 10 is provided on the platform 2 side of the upper part of the car door 9. Above the car engagement plate 10, landing detection devices 11 are provided on the first car 8a and the second car 8b.

The operation state of the interlock device 4 and the detection state of the landing detection device 11 are grasped by the control device 12. The control device 12 controls the operation of the first hoisting machine 6a and the second hoisting machine 6b based on the operation state of the interlock device 4, the detection state of the landing detection device 11, and the like.

In this elevator, the first car 8a moves up and down by the operation of the first hoist 6a. The second car 8b moves up and down by the operation of the second hoisting machine 6b. For example, when the first car 8 a reaches the landing 2, the landing detection device 11 detects the plate 5. This detection signal is output to the control device 12. Based on the detection signal, the control device 12 detects that the first car 8a has landed on the landing 2.

Thereafter, the control device 12 moves the car door 9 in the opening direction. At this time, the car engaging plate 10 is engaged with the interlock device 4. The interlock device 4 is released by the engagement. In this state, the car door 9 further moves in the opening direction. Following the movement, the landing door 3 also moves in the opening direction. At this time, the control device 12 determines that the landing door 3 is opened by releasing the interlock device 4 as a determination unit.

Next, the landing door device and the car door device will be described with reference to FIGS. 2 and 3.
FIG. 2 is a front view of an elevator landing door device and a car door device in which the elevator safety device according to Embodiment 1 of the present invention is used. FIG. 3 is a side view of a basic configuration of an elevator landing door device and a car door device in which the elevator safety device according to Embodiment 1 of the present invention is used.

As shown in FIG. 2, a landing door device 13 is fixed to the upper part of the entrance / exit of the landing 2. A rail 14 is fixed to the landing door device 13. A plurality of door rollers 15 are provided on the upper surface of the rail 14 so as to roll freely. A hanger plate 16 is suspended from the plurality of door rollers 15. The upper part of the landing door 3 is fixed to the hanger plate 16.

As shown in FIG. 3, a car door device 17 is fixed to the upper part of the entrance / exit of the first car 8a and the second car 8b. A rail 18 is fixed to the car door device 17. A plurality of door rollers 19 are provided on the upper surface of the rail 18 so as to freely roll. A hanger plate 20 is suspended from the plurality of door rollers 19. The upper part of the car door 9 is fixed to the hanger plate 20. A door motor 21 is fixed to the upper portion of the car door device 17.

As shown in FIG. 2, a mounting bracket 22 is fixed to one side of the landing door device 13. A fixing piece 23 is fixed to the attachment metal 22. Above the fixed piece 23, the landing door open detection switch 24 is fixed to the mounting bracket 22.

The interlock device 4 is rotatably attached to the hanger plate 16. An engaging portion is provided on the distal end side of the interlock device 4. The engaging portion is provided to engage with the upper portion of the fixed piece 23 when the landing door 3 is fully closed. A contact portion is provided on the distal end side of the engaging portion. The contact portion is provided so as to contact the upper side of the landing door open detection switch 24 when the landing door 3 is fully closed. An unlocking device 25 is provided above the landing door 3. Engagement plates 10 are disposed on both sides of the interlock device 4. The engagement plate 10 is fixed to the hanger plate 20.

A car door open detector 26 and a car door open detection switch 27 are fixed at the center of the upper part of the landing door device 13. At the center of the upper end of the hanger plate 20, an operating device 28 is fixed.

Next, the operations of the car door 9 and the landing door 3 will be specifically described with reference to FIGS. 2 and 3.
For example, when the first car 8 a reaches the landing 2, the car door 9 moves in the opening direction by the power of the door motor 21. At this time, the engagement plate 10 moves to the right in FIG. By this movement, one of the engagement plates 10 presses the interlock device 4 to the right side in FIG. The interlock device 4 is rotated clockwise by the pressing. By this rotation, the engaging portion of the interlock device 4 is released from the engagement with the fixed piece 23. With the release, the landing door 3 moves in the opening direction together with the car door 9. At this time, the contact portion of the interlock device 4 is released from contact with the landing door open detection switch 24. By the release, the control device 12 detects that the landing door 3 is not fully closed.

When the car door 9 moves in the closing direction, the engagement plate 10 moves to the left side in FIG. By this movement, the engagement plate 10 presses the interlock device 4 to the left side in FIG. By the pressing, the interlock device 4 rotates in the direction opposite to the clockwise direction. In this state, the landing door 3 moves in the closing direction together with the car door 9. When the landing door 3 is fully closed, the engaging portion of the interlock device 4 is engaged with the fixed piece 23. At this time, the contact portion of the interlock device 4 contacts the landing door open detection switch 24. By this contact, the control device 12 detects that the landing door 3 is in a fully closed state.

Next, the car door open detector 26 will be described in detail with reference to FIGS. 4 and 5.
4 and 5 are front views of a main part of the elevator landing door device 13 in which the elevator safety device according to Embodiment 1 of the present invention is used.

As shown in FIG. 4, the car door open detector 26 includes a base body 26a, a shaft 26b, a pair of rollers 26c, a contact 26d, a pair of stoppers 26e, and a spring 26f.

The base body 26a is formed to be substantially triangular on the vertical projection plane. The shaft 26b is provided on the top of the base body 26a. The shaft 26b is fixed to the landing door device 13 with the base body 26a being pivotally supported. One of the rollers 26c is provided at the left corner of the lower portion of the base body 26a. The other of the rollers 26c is provided at the right corner at the bottom of the base body 26a. The contact 26d is fixed to the other right outer side of the roller 26c.

One of the stoppers 26e is fixed to the landing door device 13 on the left outer side of the base body 26a. The other of the stoppers 26e is fixed to the landing door device 13 on the right outer side of the base body 26a. One end of the spring 26 f is fixed to the landing door device 13. The other end of the spring 26f is fixed to the approximate center of the base body 26a.

In the fully closed state of the car door 9, as shown in FIG. 4, the base 26a is stopped by the balance between the urging force from the spring 26f and the reaction force from one of the stoppers 26e.

When the car door 9 starts to open, the operation device 28 presses the other of the rollers 26c as shown in FIG. By this pressing, the car door open detector 26 rotates about the shaft 26b in the direction opposite to the clockwise direction. The contact 26d contacts the car door open detection switch 27 by the rotation.

At this time, the base body 26a is in a stable state by the balance between the urging force from the spring 26f and the reaction force from the other of the stopper 26e. For this reason, when the car door 9 is opened, the contact 26 d maintains contact with the car door open detection switch 27.

When the car door 9 is closed, immediately before the car door 9 is fully closed, the operating device 28 presses one of the rollers 26c. By this pressing, the car door open detector 26 rotates clockwise around the shaft 26b. The contact 26 d is released from contact with the car door open detection switch 27 by the rotation.

Thereafter, when the car door 9 is fully closed, as shown in FIG. 4, the base 26a is stopped by the balance between the urging force from the spring 26f and the reaction force from one of the stoppers 26e.

Next, the safety circuit will be described with reference to FIG.
FIG. 6 is a circuit diagram of the elevator safety device according to Embodiment 1 of the present invention.

In FIG. 6, 29 is a contact point of the landing door open detection switch 24 corresponding to the landing 2 on each floor (for example, the first floor to the Nth floor). These contacts 29 are connected in series between a power source (not shown) and the control device 12. Reference numeral 30 denotes a contact point of the car door open detection switch 27 corresponding to each landing 2. These contacts 30 are connected in parallel to each of the contacts 29 of the landing door open detection switch 24.

In the safety circuit, the signal to the control device 12 is interrupted when both the contact 29 of the landing door open detection switch 24 and the contact 30 of the car door open detection switch 27 are simultaneously opened in at least one landing 2. The At this time, the control device 12 performs control so that the first car 8a and the second car 8b cannot travel.

Next, the operation of the safety circuit during normal operation will be described with reference to FIG.
FIG. 7 is a diagram for explaining signals of the elevator safety device according to Embodiment 1 of the present invention. The horizontal axis in FIG. 7 is the position of the car door 9 and the landing door 3. The vertical axis in the upper part of FIG. 7 is the state of the contact signal of the landing door open detection switch 24. The vertical axis in the lower part of FIG. 7 is the state of the contact signal of the car door open detection switch 27.

As shown in FIG. 7, when the car door 9 and the landing door 3 move in the opening direction from the fully closed state, the contact point 29 of the landing door opening detection switch 24 is closed after the contact point 30 of the car door opening detection switch 27 is closed. Opens. On the other hand, when the car door 9 and the landing door 3 move in the closing direction from the fully open state, the contact point 29 of the car door opening detection switch 27 is opened after the contact point 29 of the landing door opening detection switch 24 is closed. For this reason, a safety circuit is not interrupted | blocked when the car door 9 and the landing door 3 open and close in normal time.

Next, the operation of the safety circuit during maintenance will be described with reference to FIG.
FIG. 8 is a diagram for explaining signals of the elevator safety device according to Embodiment 1 of the present invention. The horizontal and vertical axes in FIG. 8 are the same as the horizontal and vertical axes in FIG.

In the hall 2 where the first car 8a or the like is not landed, when the maintenance person opens the landing door 3 by inserting a dedicated key into the unlocking device 25 from the hall 2 side and rotating it, the landing door open detection switch 24 Contact 29 opens. On the other hand, since the first car 8a or the like has not landed on the landing 2, the contact 30 of the car door open detection switch 27 is kept open. As a result, when the contact 29 of the landing door open detection switch 24 is opened, the safety circuit operates. By this operation, the signal to the control device 12 is interrupted. At this time, the control device 12 performs control so that the first car 8a and the second car 8b cannot travel.

Next, the operation of the elevator after the operation of the safety circuit is described.
FIG. 9 is a flowchart for illustrating the operation of the elevator after the operation of the elevator safety device according to Embodiment 1 of the present invention.

In step S1, the control device 12 determines whether or not the safety circuit has been operated. If the safety circuit is not operating, step S1 is repeated. If the safety circuit is operating, the process proceeds to step S2.

In step S2, the control device 12 determines whether or not a predetermined reset operation has been performed by maintenance personnel. If the reset operation has not been performed, the process proceeds to step S3. In step S3, the control device 12 prevents the elevator from operating. Then, it progresses to step S4 and the control apparatus 12 outputs the signal for alert | reporting that an elevator does not operate | move until reset operation is made.

Based on the signal, the operation indicators (not shown) of the halls 2, the first car 8a, the second car 8b, and the display devices (not shown) such as the elevator management room are reset. Display that the elevator is not working. Then, it returns to step S1 and the said operation | movement is performed.

If the reset operation is performed in step S2, the process proceeds to step S5. In step S5, the control device 12 is in a state where the elevator can operate. Then, it returns to step S1 and the said operation | movement is performed.

According to the first embodiment described above, the detection result of the open / closed state of the landing door 3 of the landing 2 where the first car 8a or the like is landing is invalid only when the opening of the car door 9 is started. It becomes. For this reason, it can be determined that the landing door 3 of the landing 2 other than the landing 2 where the first car 8a or the like is landing is opened. In addition, the safety of the elevator can be improved. Furthermore, even when a plurality of cars are traveling, it is possible to prevent the other cars from being obstructed. Further, when the first car 8a and the like pass through the hall 2, the contact 30 of the car door open detection switch 27 is not closed. For this reason, it can also be determined that the landing door 3 is opened when the first car 8a and the like pass through the landing 2.

The car door open detection switch 27 may have any configuration as long as it detects that the car door 9 has been opened. Further, the car door open detection switch 27 may be provided only at the hall 2 where the effect is desired to be effective.

Also, the operating device 28 is provided on the hanger plate 20 of the car door 9. That is, if the car door 9 does not start opening reliably, the car door open detection switch 27 does not operate. For this reason, the car door open detection switch 27 can reliably detect the operation of the car door 9. The car door open detection switch 27 may be provided in the hoistway 1. Further, the operating device 28 may be provided in the car door 9 itself. Also in these cases, the operation of the car door 9 can be reliably detected.

Also, the car door open detection switch 27 starts to operate before the landing door open detection switch 24. For this reason, it can prevent that a safety circuit is interrupted | blocked when the car door 9 and the landing door 3 open and close in normal time.

Further, the car door open detection switch 27 is provided so as not to be operated by the unlocking device 25. In this case, the safety circuit operates when the maintenance staff or the like opens the car door 9 with the unlocking device 25 at the landing 2 where the first car 8a or the like has not landed. As a result, the elevator does not operate. For this reason, the safety of maintenance personnel and the like can be ensured.

In addition, a safety circuit is configured only by the

contacts

29 and 30. For this reason, it is possible to reliably detect that the landing door 3 is opened in a different situation than usual with a simple circuit configuration.

In addition, when any of the car doors 9 is determined to be opened, the elevator does not operate until a predetermined reset operation is performed. For this reason, when one of the car doors 9 is opened, the elevator can be operated after confirming safety.

Also, a signal for informing that the elevator will not operate until a reset operation is performed is output. For this reason, it is possible to notify the elevator user and owner that the elevator is stopped by operating the safety circuit.

Embodiment 2. FIG.
FIG. 10 is a front view of an elevator landing door device 13 in which the elevator safety device according to Embodiment 2 of the present invention is used. In addition, the same code | symbol is attached | subjected to Embodiment 1 and an equivalent part, and description is abbreviate | omitted.

In the first embodiment, the operation device 28 operates the car door open detector 26. On the other hand, in the second embodiment, one of the engagement plates 10 operates the car door open detector 26. The operation of the car door open detector 26 at this time is substantially the same as that of the first embodiment.

According to the second embodiment described above, inconsistency occurs between the operation of the landing door open detection switch 24 and the operation of the car door open detection switch 27 due to one of the engagement plate 10 and the operation device 28 dropping off. Disappear. For this reason, it can be set as a safer safety device. In addition, the number of safety device parts can be reduced. By reducing the number of parts, the layout of the safety device can be improved.

Embodiment 3 FIG.
FIG. 11 is a front view of an elevator landing door device 13 in which an elevator safety device according to Embodiment 3 of the present invention is used. In addition, the same code | symbol is attached | subjected to Embodiment 1 and an equivalent part, and description is abbreviate | omitted.

The car door opening detector 26 and the car door opening detection switch 27 of the first embodiment are fixed to the landing door device 13. On the other hand, the car door open detector 31 of the third embodiment is fixed to the hanger plate 16 below the interlock device 4. The car door open detector 31 has a configuration substantially in contrast to the interlock device 4 with respect to the horizontal line. The car door open detection switch 32 is fixed to the mounting bracket 22 below the landing door open detection switch 24. The car door open detection switch 32 has a configuration substantially in contrast to the landing door open detection switch 24 with respect to the horizontal line.

In Embodiment 3, when the car door 9 starts to open, the engagement plate 10 moves to the right in FIG. With this movement, one of the engagement plates 10 presses the car door open detector 31. By this pressing, the car door open detector 31 rotates in the opposite direction to the timepiece. By this rotation, the contact portion 31a of the car door open detector 31 is released from contact with the car door open detector switch 32.

When the car door 9 moves in the closing direction, the engagement plate 10 moves to the left in FIG. By the movement, the other of the engagement plates 10 presses the car door open detector 31 to the left in FIG. The car door open detector 31 is rotated clockwise by the pressing. By this rotation, the contact portion 31 a of the car door open detector 31 comes into contact with the car door open detector switch 32.

Next, the circuit of the safety device will be described with reference to FIG.
FIG. 12 is a circuit diagram of an elevator safety device according to Embodiment 3 of the present invention.

In FIG. 6, 33 is a contact of the car door open detection switch 32 corresponding to each hall 2. These contacts 33 are connected in parallel with the entire plurality of contacts 29 between the power source and the control device 12. Each of these contacts 33 is connected in series with a relay 34 corresponding to each hall 2. 34 a is a normally open contact of the relay 34 corresponding to each hall 2. These normally open contacts 34 a are connected in parallel to each of the contacts 29 of the landing door open detection switch 24 corresponding to each landing 2.

In the safety circuit, when the car door 9 is opened, the contact 33 of the car door open detection switch 32 corresponding to the landing 2 where the first car 8a or the like is landing opens, and the relay corresponding to the landing 2 is opened. 34 operates. With this operation, the normally open contact 34a of the relay 34 is closed.

According to the third embodiment described above, the switch can be closed only in the fully closed state by using a switch of a normally used forced separation mechanism.

As described above, the elevator safety device according to the present invention can be used in a system that reliably detects that a landing door is opened in a different situation than usual.

1 hoistway 2 landing 3 landing door 4 interlock device 5 plate 6a first hoisting machine 6b second hoisting machine 7a first main rope 7b second main rope 8a first car 8b second car 9 car door 10 engagement Plate 11 Landing detection device 12 Control device 13 Landing door device 14 Rail 15 Door roller 16 Hanger plate 17 Car door device 18 Rail 19 Door roller 20 Hanger plate 21 Door motor 22 Mounting bracket 23 Fixing piece 24 Landing door open detection switch 25 Unlocking device 26 Car door open detector 26a Base 26b Shaft 26c Roller 26d Contact 26e Stopper 26f Spring 27 Car door open detection switch 28 Actuator 29 Contact 30 Contact 31 Car door open detector 31a Contact 32 Car door open detection switch 33 Contact 34 Relay 34a Normally open contact

Claims

A plurality of landing door opening detection units provided corresponding to each landing door provided at each landing of the elevator, and detecting the opening of each landing door;
A car door opening detection unit for detecting the opening of the car door provided in the elevator car;
A landing detector for detecting that the car has landed at each landing;
When it is determined that one of the landing doors has been opened based on the detection state of the landing door opening detection unit, if the opening of the car door has not started, the landing where the car is landing A determination unit that validates the detection result of the landing door opening detection unit of the vehicle, and invalidates the detection result of the landing door opening detection unit of the landing on which the car is landing when the opening of the car door is started, and ,
An elevator safety device characterized by comprising:
The car door opening detection unit is
A switch unit provided in each hall or the hoistway of the elevator;
Provided on the car door or a hanger that hangs the car door, when the car door starts to open, the operation unit that contacts the switch unit and operates the switch unit;
The elevator safety device according to claim 1, further comprising:
The car door opening detection unit is
A switch unit provided in each hall or the hoistway of the elevator;
The platform doors are attached to engaging portions provided in the car doors to interlock the car doors, and when the car doors start to open, the switch parts come into contact with the switch parts. An operating part to be operated;
The elevator safety device according to claim 1, further comprising:
The car door open detection unit is provided to start a detection operation before the detection operation of the landing door open detection unit of the landing on which the car is landing when the car door starts to open. The elevator safety device according to any one of claims 1 to 3, wherein the elevator safety device is provided.
The landing door opening detection unit is provided to operate by an unlocking device provided in the landing door,
The elevator safety device according to any one of claims 1 to 4, wherein the car door opening detection unit is provided so as not to be operated by the unlocking device.
A plurality of landing door opening detection contacts connected in series corresponding to each of the landings to open when the landing door opening detection unit detects the opening of each of the landing doors;
The car door opening detection means is connected in parallel to each of the plurality of landing door opening detection contacts corresponding to each landing so as to close when the opening of the car door is detected at each landing. A plurality of car door opening detection contacts;
Having a safety circuit with
The elevator safety according to any one of claims 1 to 5, wherein the determination unit determines that any of the landing doors is opened based on an output state of the safety circuit. apparatus.
A plurality of landing door opening detection contacts connected in series corresponding to each of the landings to open when the landing door opening detection unit detects the opening of each of the landing doors;
The car door opening detecting means is connected in parallel to the plurality of landing door opening detection contacts corresponding to the halls so as to open when the car door opening detection means detects the opening of the car door at the halls. A plurality of car door opening detection contacts;
A plurality of relays connected in series with each of the plurality of car door open detection contacts corresponding to each landing,
A plurality of relay contacts connected in parallel to each of the plurality of landing door open detection contacts corresponding to each of the landings to be closed when the relay corresponding to each of the landings is operated;
Having a safety circuit with
The elevator safety according to any one of claims 1 to 5, wherein the determination unit determines that any of the landing doors is opened based on an output state of the safety circuit. apparatus.
A control device that prevents the elevator from operating until a predetermined reset operation is performed when it is determined that any of the landing doors is opened;
The elevator safety device according to any one of claims 1 to 7, further comprising:
The elevator safety device according to claim 8, wherein the control device outputs a signal for notifying that the elevator does not operate until the reset operation is performed.