WO2021220349A1 - Elevator device - Google Patents

Abstract

Provided is an elevator device capable of suppressing the generation of impact tension on a main cable. This elevator device comprises: a car that is installed so as to be capable of vertical movement inside the hoistway of an elevator; a counterweight that is installed so as to be capable of vertical movement inside the hoistway; a main cable that connects the car and the counterweight; a hoisting machine that applies a driving or braking force to the main cable; a car emergency stopper that is effective against the lowering of the car; a counterweight emergency stopper that is effective against the lowering of the counterweight; and a safety monitoring device that upon detecting an abnormality that would cause a decrease in the tension of the main cable, suppresses the swing back of the car or the counterweight by operating the car emergency stopper or the counterweight emergency stopper.

Description

Elevator device

This disclosure relates to an elevator device.

Patent Document 1 discloses an elevator device. The elevator device activates a brake or an emergency stop depending on the degree of abnormality.

Japanese Patent Application Laid-Open No. 2011-121726

However, the elevator device described in Patent Document 1 does not take measures when the car or the balance weight collides with the shock absorber. Therefore, when one of the car and the balance weight collides with the shock absorber, the other of the car and the balance weight jumps. After that, a shocking tension on the main rope may occur.

This disclosure was made to solve the above-mentioned problems. An object of the present disclosure is to provide an elevator device capable of suppressing the generation of impact tension on the main rope.

The elevator device according to the present disclosure includes a cage provided so as to be able to move up and down the inside of the hoistway of the elevator, a balance weight provided so as to be able to move up and down the inside of the hoistway, and the cage and the balance weight. A main rope connecting the two, a hoist that applies a driving force or a braking force to the main rope, a car emergency stop that is effective for lowering the car, and a balance that is effective for lowering the balance weight. Safety that suppresses the swinging back of the car or the balance weight by operating the car emergency stop or the balance weight emergency stop when the weight emergency stop and the abnormality causing the tension decrease of the main rope are detected. It was equipped with a monitoring device.

According to the present disclosure, the safety monitoring device suppresses the swinging back of the car or the balance weight by operating the car emergency stop or the balance weight emergency stop when an abnormality causing a decrease in the tension of the main rope is detected. .. Therefore, it is possible to suppress the generation of impact tension on the main rope.

It is a block diagram of the elevator device in Embodiment 1. FIG. It is a figure for demonstrating the 1st example of abnormality monitoring by the safety monitoring device of the elevator device in Embodiment 1. FIG. It is a figure for demonstrating the 2nd example of abnormality monitoring by the safety monitoring device of the elevator device in Embodiment 1. FIG. It is a flowchart for demonstrating the 3rd example of abnormality monitoring by the safety monitoring apparatus of the elevator apparatus in Embodiment 1. FIG. FIG. 5 is a hardware configuration diagram of a safety monitoring device for an elevator device according to the first embodiment. It is a block diagram of the elevator device in Embodiment 2. It is a flowchart for demonstrating the example of abnormality monitoring by the safety monitoring device of the elevator device in Embodiment 2. It is a block diagram of the elevator device in Embodiment 3. It is a flowchart for demonstrating the example of abnormality monitoring by the safety monitoring device of the elevator device in Embodiment 3.

The embodiment will be described according to the attached drawings. In each figure, the same or corresponding parts are designated by the same reference numerals. The duplicate description of the relevant part will be simplified or omitted as appropriate.

Embodiment 1.
FIG. 1 is a configuration diagram of an elevator device according to the first embodiment.

In the elevator device of FIG. 1, the elevator car 1 and the balance weight 2 are provided inside a hoistway (not shown).

The main rope 3 connects the basket 1 and the balance weight 2. The hoisting machine 4 is provided in a machine room (not shown). The hoisting machine 4 includes a hoisting pulley 5 and a deflecting wheel 6. The hoisting motor (not shown) is arranged coaxially with the hoisting pulley 5. The hoisting pulley 5 and the deflecting pulley 6 maintain a state in which the main rope 3 is wound. The brake 41a and the brake 41b are provided on the hoisting machine 4.

The car emergency stop 11 is provided at the lower part of the car 1. The balance weight emergency stop 21 is provided at the lower part of the balance weight 2.

The car shock absorber 12 is provided at the bottom of the hoistway. The car shock absorber 12 overlaps the car 1 on the horizontal projection plane. The car shock absorber switch 13 is provided in the car shock absorber 12. The balance weight shock absorber 22 is provided at the bottom of the hoistway. The balance weight shock absorber 22 overlaps with the balance weight 2 on the horizontal projection plane. The balance weight shock absorber switch 23 is provided on the balance weight shock absorber 22.

The car position / speed sensor 14 is provided on the upper part of the car 1.

The hoisting machine 4 applies a driving force or a braking force to the main rope 3.

Specifically, in the hoisting machine 4, when the hoisting motor is rotationally driven, the hoisting pulley 5 rotates. When the hoisting pulley 5 rotates, the main rope 3 moves. When the main rope 3 moves, the car 1 and the balance weight 2 move up and down in opposite directions.

The brake 41a and the brake 41b are connected to the hoisting pulley 5 and the main rope 3 as needed.

The car emergency stop 11 acts a braking force directly on the car 1 as needed. For example, the car emergency stop 11 is effective when the main rope 3 is loosened or broken. The car emergency stop 11 has a structure that generates a braking force only when the car 1 is lowered.

The balance weight emergency stop 21 acts a braking force directly on the balance weight 2. For example, the balance weight emergency stop 21 is effective when the main rope 3 is loosened or broken. The balance weight emergency stop 21 has a structure in which a braking force is generated only when the balance weight 2 is descending.

The car shock absorber 12 cushions the impact in the event that the car 1 is about to collide with the bottom of the hoistway. The car shock absorber switch 13 detects that the car shock absorber 12 has been operated due to the collision of the car 1. The car shock absorber switch 13 is in the ON state when the plunger of the car shock absorber 12 is in the initial position before being pushed by the car 1. The car shock absorber switch 13 switches from ON to OFF when the car shock absorber 12 operates and the plunger of the car shock absorber 12 starts to descend.

The balance weight shock absorber 22 cushions the impact when the balance weight 2 is about to collide with the bottom of the hoistway. The balance weight shock absorber switch 23 detects that the balance weight shock absorber 22 has been operated due to the collision of the balance weight 2. The balance weight shock absorber switch 23 is in the ON state when the plunger of the balance weight shock absorber 22 is in the initial position before being pushed by the balance weight 2. The balance weight shock absorber switch 23 switches from ON to OFF when the balance weight shock absorber 22 operates and the plunger of the balance weight shock absorber 22 starts to descend.

The car position / speed sensor 14 transmits a signal for detecting the position of the car 1, the traveling speed, and the traveling direction. The car position / speed sensor 14 is realized by a linear encoder, a rotary encoder that detects the amount of rotation of a pulley driven by an endless rope partially fixed to the car 1, and the like.

The safety monitoring device 100 monitors an abnormality that occurs in the elevator device. For example, the safety monitoring device 100 detects the position, running speed, and running direction of the car 1 by electronically processing the signal from the car position / speed sensor 14. When an abnormality is detected, the safety monitoring device 100 outputs an operation command to any one of the brake 41a, the brake 41b, the car emergency stop 11, and the balance weight emergency stop 21.

For example, the car 1 is subject to braking by the brake 41a and the brake 41b or braking by the car emergency stop 11 even if the car 1 should pass the lowest floor. After that, the car 1 collides with the car shock absorber 12. As a result, the car 1 is slowly stopped by the buffering effect of the car shock absorber 12.

In the process of gently stopping the car 1, a shockingly high deceleration exceeding the gravitational acceleration may occur momentarily. However, the deceleration of the balance weight 2 does not exceed the gravitational acceleration. Therefore, the tension of the main rope 3 connecting the car 1 and the balance weight 2 is reduced or lost, and the balance weight 2 jumps.

In this case, the safety monitoring device 100 operates the balance weight emergency stop 21 when it detects that the car 1 has collided with the car shock absorber 12. While the balance weight 2 is rising, the balance weight emergency stop 21 does not generate a braking force. When the balance weight 2 turns downward, the balance weight emergency stop 21 generates a braking force. Therefore, the balance weight emergency stop 21 holds the balance weight 2 before the tension of the main rope 3 is restored. As a result, the swing-back of the balance weight 2 is suppressed. In this case, a strong impact tension on the main rope 3 does not act.

For example, the car 1 is braked by the brake 41a and the brake 41b even if it should pass the top floor. After that, the balance weight 2 collides with the balance weight shock absorber 22. As a result, the balance weight 2 gently stops due to the buffering effect of the balance weight shock absorber 22.

In the process of the balance weight 2 stopping gently, a shocking high deceleration exceeding the gravitational acceleration may occur momentarily. However, the deceleration of the car 1 does not exceed the gravitational acceleration. Therefore, the tension of the main rope 3 connecting the car 1 and the balance weight 2 is reduced or lost, and the car 1 jumps.

In this case, the safety monitoring device 100 operates the car emergency stop 11 when it detects that the balance weight 2 collides with the balance weight shock absorber 22. While the car 1 is rising, the car emergency stop 11 does not generate a braking force. When the car 1 turns downward, the car emergency stop 11 generates a braking force. Therefore, the car emergency stop 11 holds the car 1 before the tension of the main rope 3 is restored. As a result, the swinging back of the car 1 is suppressed. At this time, a strong impact tension on the main rope 3 does not act.

Next, a first example of abnormality monitoring by the safety monitoring device 100 will be described with reference to FIG.
FIG. 2 is a diagram for explaining a first example of abnormality monitoring by the safety monitoring device of the elevator device according to the first embodiment.

In FIG. 2, the curve 1000 shows the relationship between the speed of the car 1 traveling toward the lowest floor and the distance to the position where the car 1 collides with the car shock absorber 12. Curve 1001 is the first safety monitoring standard in the safety monitoring device 100. Curve 1002 is the second safety monitoring standard in the safety monitoring device 100. The second safety monitoring standard is set higher than the first safety monitoring standard.

The safety monitoring device 100 detects the position of the car 1 and the speed of the car 1 by using the car position / speed sensor signal 114 which is a signal from the car position / speed sensor 14. The safety monitoring device 100 compares these detection results with the first safety monitoring standard and the second safety monitoring standard.

When the speed of the car 1 exceeds the first safety monitoring standard, the safety monitoring device 100 operates the brake 41a and the brake 41b by outputting the brake operation command 141. When the speed of the car 1 exceeds the second safety monitoring standard, the safety monitoring device 100 operates the car emergency stop 11 by outputting the car emergency stop operation command 111.

Here, the first safety monitoring standard and the second safety monitoring standard are set to be higher than the curve 1000 and lower as they approach the position where they collide with the car shock absorber 12. Therefore, even if the speed value of the car 1 exceeds the value of the curve 1000 and approaches the lowest floor at a high speed, the speed at which the car 1 collides with the car shock absorber 12 is reduced. The effect is expected.

Next, a second example of abnormality monitoring by the safety monitoring device 100 will be described with reference to FIG.
FIG. 3 is a diagram for explaining a second example of abnormality monitoring by the safety monitoring device of the elevator device according to the first embodiment.

In FIG. 3, the curve 2000 shows the relationship between the speed of the car 1 traveling toward the top floor and the distance of the car 1 until the balance weight 2 collides with the balance weight shock absorber 22. Curve 2001 is the first safety monitoring standard in the safety monitoring device 100. The straight line 2002 is the third safety monitoring standard in the safety monitoring device 100. The third safety monitoring standard is set higher than the first safety monitoring standard.

The safety monitoring device 100 detects the position of the car 1 and the speed of the car 1 by using the input signal from the car position / speed sensor 14. The safety monitoring device 100 compares these detection results with the first safety monitoring standard and the third safety monitoring standard.

When the speed of the car 1 exceeds the first safety monitoring standard, the safety monitoring device 100 operates the brake 41a and the brake 41b by outputting the brake operation command 141. When the speed of the car 1 exceeds the third safety monitoring standard, the safety monitoring device 100 operates the balance weight emergency stop 21 by outputting the balance weight emergency stop operation command 121.

Here, the first safety monitoring standard and the third safety monitoring standard are set to be higher than the curve 2000 and lower as the position on the top floor is approached. Therefore, even if the speed value of the car 1 exceeds the value of the curve 2000 and approaches the top floor at a high speed, the height at which the car 1 jumps through the top floor is lowered. The effect of suppressing is expected.

Next, a third example of abnormality monitoring by the safety monitoring device 100 will be described with reference to FIG.
FIG. 4 is a flowchart for explaining a third example of abnormality monitoring by the safety monitoring device of the elevator device according to the first embodiment.

The safety monitoring device 100 continues processing until it reaches End from Start when it is started.

Specifically, in step J100, the safety monitoring device 100 determines whether or not the car 1 is stopped.

When the car 1 is stopped in step J100, the safety monitoring device 100 performs the process of step J110. In step J110, the safety monitoring device 100 determines whether or not the car shock absorber switch 13 is OFF.

When the car shock absorber switch 13 is turned off in step J110, the safety monitoring device 100 determines that the buffer stroke of the car shock absorber 12 is not sufficiently held. In this case, the safety monitoring device 100 performs the process of step P110. In step P110, the safety monitoring device 100 outputs a car emergency stop operation command 111 for operating the car emergency stop 11.

If the car shock absorber switch 13 is not OFF in step J110 or after step P110, the safety monitoring device 100 performs the process of step J120. In step J120, the safety monitoring device 100 determines whether or not the balance weight shock absorber switch 23 is OFF.

When the balance weight shock absorber switch 23 is turned off in step J120, the safety monitoring device 100 determines that the buffer stroke of the balance weight shock absorber switch 23 is not sufficiently held. In this case, the safety monitoring device 100 performs the process of step P120. In step P120, the safety monitoring device 100 outputs a balance weight emergency stop operation command 121 for operating the balance weight emergency stop 21.

If the car 1 is not stopped in step J100, the safety monitoring device 100 performs the process of step J121. In step J121, the safety monitoring device 100 determines whether or not the change from ON to OFF of the car shock absorber switch 13 is detected.

When the change of the car shock absorber switch 13 from ON to OFF is detected in step J121, the safety monitoring device 100 determines that the car 1 has collided with the car shock absorber 12. In this case, the safety monitoring device 100 performs the process of step P121. In step P121, the safety monitoring device 100 outputs a balance weight emergency stop operation command 121 for operating the balance weight emergency stop 21.

When the changeover of the car shock absorber switch 13 from ON to OFF is not detected in step J121 or after step P121, the safety monitoring device 100 performs the process of step J111. In step J111, the safety monitoring device 100 determines whether or not the switching of the balance weight shock absorber switch 23 from ON to OFF is detected.

When the switching of the balance weight shock absorber switch 23 from ON to OFF is detected in step J111, the safety monitoring device 100 determines that the balance weight 2 has collided with the balance weight shock absorber 22. In this case, the safety monitoring device 100 performs the process of step P111. In step P111, the safety monitoring device 100 outputs a car emergency stop operation command 111 for operating the car emergency stop 11.

If the balance weight shock absorber switch 23 is not OFF in step J120, after step P120, if the switching from ON to OFF of the balance weight shock absorber switch 23 is not detected in step J111, the safety monitoring device 100 is after step P111. , Step J130 is performed.

In step J130, the safety monitoring device 100 determines whether or not the balance weight emergency stop operation command 121 or the car emergency stop operation command 111 is output. If neither the balance weight emergency stop operation command 121 nor the car emergency stop operation command 111 is output in step J130, the safety monitoring device 100 performs the process of step J100. When the balance weight emergency stop operation command 121 or the car emergency stop operation command 111 is output in step J130, the safety monitoring device 100 ends the process while maintaining the corresponding output.

According to the first embodiment described above, the safety monitoring device 100 operates the car emergency stop 11 or the balance weight emergency stop 21 when it detects an abnormality that causes a decrease in tension of the main rope 3. Suppresses the swinging back of the basket 1 or the balance weight 2. Therefore, it is possible to suppress the generation of a strong impact tension on the main rope 3. As a result, the strength design criteria of the car 1, the balance weight 2, and the hoisting machine 4 directly connected to the main rope 3 can be relaxed. By relaxing the strength design standards, it is possible to realize simplification, miniaturization, cost reduction, etc. of these devices.

For example, the safety monitoring device 100 operates the balance weight emergency stop 21 when it detects that the car 1 has collided with the car shock absorber 12. Therefore, when a high acceleration in the upward direction of the car 1 is generated, it is possible to suppress the swinging back of the balance weight 2. As a result, the balance weight 2 and the hoisting machine 4 can be simplified by relaxing the strength design standard.

For example, the safety monitoring device 100 operates the car emergency stop 11 when it detects that the balance weight 2 collides with the balance weight shock absorber 22. Therefore, when a high upward acceleration of the balance weight 2 is generated, it is possible to suppress the swinging back of the car 1. As a result, the car 1 and the hoisting machine 4 can be simplified by relaxing the strength design standard.

Further, the safety monitoring device 100 operates the balance weight emergency stop 21 when the compression operation of the car shock absorber 12 is detected while the car 1 is running, and compresses the car shock absorber 12 while the car 1 is stopped. When the operation is detected, the car emergency stop 11 is operated. Therefore, not only is it possible to suppress the swinging back of the balance weight 2 when a high upward acceleration of the car 1 is generated, but also the car 1 is in a state where the capacity of the car shock absorber 12 is insufficient. Can be avoided from colliding with. As a result, it is possible to realize the simplification of the car 1 and the balance weight 2 by relaxing the strength design standard.

Further, the safety monitoring device 100 operates the car emergency stop 11 when the compression operation of the balance weight shock absorber 22 is detected while the car 1 is running, and the balance weight shock absorber 22 is operated while the car 1 is stopped. When a compression operation is detected, the balance weight emergency stop 21 is operated. Therefore, not only can the swing-back of the car 1 be suppressed when a high upward acceleration of the balance weight 2 is generated, but also the balance weight 2 is in a state where the capacity of the balance weight shock absorber 22 is insufficient. It is possible to avoid colliding with the shock absorber 22. As a result, it is possible to realize the simplification of the car 1 and the balance weight 2 by relaxing the strength design standard.

Note that, in FIG. 4, the determination criterion in the process of step J121 may be changed to "Did the car pass the top floor?". In this case, the balance weight emergency stop 21 can be operated faster. As a result, the generation of strong impact tension on the main rope 3 can be more reliably suppressed.

Further, in FIG. 4, the determination criterion in the process of step J111 may be changed to "Did the car pass the lowest floor?". In this case, the car emergency stop 11 can be operated faster. As a result, the generation of strong impact tension on the main rope 3 can be more reliably suppressed.

Next, an example of the safety monitoring device 100 will be described with reference to FIG.
FIG. 5 is a hardware configuration diagram of the safety monitoring device of the elevator device according to the first embodiment.

Each function of the safety monitoring device 100 can be realized by a processing circuit. For example, the processing circuit includes at least one processor 300a and at least one memory 300b. For example, the processing circuit comprises at least one dedicated hardware 400.

When the processing circuit includes at least one processor 300a and at least one memory 300b, each function of the safety monitoring device 100 is realized by software, firmware, or a combination of software and firmware. At least one of the software and firmware is written as a program. At least one of the software and firmware is stored in at least one memory 300b. At least one processor 300a realizes each function of the safety monitoring device 100 by reading and executing a program stored in at least one memory 300b. At least one processor 300a is also referred to as a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, and a DSP. For example, at least one memory 300b is a non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, EEPROM, magnetic disk, flexible disk, optical disk, compact disk, mini disk, DVD or the like.

If the processing circuit comprises at least one dedicated hardware 400, the processing circuit may be implemented, for example, as a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof. NS. For example, each function of the safety monitoring device 100 is realized by a processing circuit. For example, each function of the safety monitoring device 100 is collectively realized by a processing circuit.

For each function of the safety monitoring device 100, a part may be realized by the dedicated hardware 400, and the other part may be realized by software or firmware. For example, the function of detecting the speed of the car 1 is realized by a processing circuit as dedicated hardware 400, and the function other than the function of detecting the speed of the car 1 is provided by at least one processor 300a in at least one memory 300b. It may be realized by reading and executing the stored program.

In this way, the processing circuit realizes each function of the safety monitoring device 100 by hardware 400, software, firmware, or a combination thereof.

Embodiment 2.
FIG. 6 is a configuration diagram of the elevator device according to the second embodiment. The same or corresponding parts as those of the first embodiment are designated by the same reference numerals. The explanation of the relevant part is omitted.

The elevator device of the second embodiment is a device in which the car acceleration sensor 15 is added to the elevator device of the first embodiment. The car acceleration sensor 15 is provided on the upper part of the car 1. The car acceleration sensor 15 detects the acceleration of the car 1.

The safety monitoring device 100 receives the input of the car acceleration sensor signal 115 corresponding to the acceleration of the car 1 detected by the car acceleration sensor 15.

When the buffer stroke of the balance weight shock absorber 22 is insufficient, the safety monitoring device 100 operates the balance weight emergency stop 21 to prevent the balance weight 2 from colliding with the balance weight shock absorber 22 at high speed. ..

While the car 1 is descending, if a high acceleration that reaches the upward gravitational acceleration acts, the tension of the main rope 3 decreases. In this case, the balance weight 2 jumps. At this timing, the balance weight emergency stop 21 operates. As a result, the swing-back of the balance weight 2 is suppressed.

When the buffer stroke of the car shock absorber 12 is insufficient, the safety monitoring device 100 prevents the car 1 from colliding with the car shock absorber 12 at high speed by operating the car emergency stop 11.

While the car 1 is rising, if a high acceleration that reaches the downward gravitational acceleration acts, the tension of the main rope 3 decreases. In this case, the car 1 jumps. At this timing, the car emergency stop 11 operates. As a result, the swinging back of the car 1 is suppressed.

Next, an example of abnormality monitoring by the safety monitoring device 100 will be described with reference to FIG. 7.
FIG. 7 is a flowchart for explaining an example of abnormality monitoring by the safety monitoring device of the elevator device according to the second embodiment.

The safety monitoring device 100 continues processing until it reaches End from Start when it is started.

Specifically, in step J200, the safety monitoring device 100 determines whether or not the car 1 is stopped.

When the car 1 is stopped in step J200, the safety monitoring device 100 performs the process of step J210. In step J210, the safety monitoring device 100 determines whether or not the car shock absorber switch 13 is OFF.

When the car shock absorber switch 13 is turned off in step J210, the safety monitoring device 100 determines that the buffer stroke of the car shock absorber 12 is not sufficiently held. In this case, the safety monitoring device 100 performs the process of step P210. In step P210, the safety monitoring device 100 outputs a car emergency stop operation command 111 for operating the car emergency stop 11.

If the car shock absorber switch 13 is not turned off in step J210 or after step P210, the safety monitoring device 100 performs the process of step J220. In step J220, the safety monitoring device 100 determines whether or not the balance weight shock absorber switch 23 is OFF.

When the balance weight shock absorber switch 23 is turned off in step J220, the safety monitoring device 100 determines that the buffer stroke of the balance weight shock absorber switch 23 is not sufficiently held. In this case, the safety monitoring device 100 performs the process of step P220. In step P220, the safety monitoring device 100 outputs a balance weight emergency stop operation command 121 for operating the balance weight emergency stop 21.

If the car 1 is not stopped in step J200, the safety monitoring device 100 performs the process of step J211. In step J211th, the safety monitoring device 100 determines whether or not the car 1 is rising by using the car position / speed sensor signal 114 output from the car position / speed sensor 14.

When the car 1 is raised in step J211 the safety monitoring device 100 performs the process of step J212. In step J212, the safety monitoring device 100 uses the car acceleration sensor signal 115 to determine whether or not the downward acceleration of the car 1 is less than a preset value.

If the downward acceleration of the car 1 is not less than the preset value in step J212, the safety monitoring device 100 performs the process of step P211. In step P211 the safety monitoring device 100 outputs a car emergency stop operation command 111 for operating the car emergency stop 11.

If the car 1 is not rising in step J211 or the downward acceleration of the car 1 is less than a preset value in step J212, or after step P211 the safety monitoring device 100 performs the process of step J221. ..

In step J221, the safety monitoring device 100 determines whether or not the car 1 is descending by using the car position / speed sensor signal 114 output from the car position / speed sensor 14.

When the car 1 is lowered in step J221, the safety monitoring device 100 performs the process of step J222. In step J222, the safety monitoring device 100 uses the car acceleration sensor signal 115 to determine whether or not the upward acceleration of the car 1 is less than a preset value.

If the upward acceleration of the car 1 is not less than the preset value in step J222, the safety monitoring device 100 performs the process of step P212. In step P212, the safety monitoring device 100 outputs a balance weight emergency stop operation command 121 for operating the balance weight emergency stop 21.

If the balance weight shock absorber switch 23 is not turned off in step J220, if the car 1 is not lowered in step J221 after step P220, the upward acceleration of the car 1 in step J222 is less than the preset value. In this case, after step P212, the safety monitoring device 100 performs the process of step J230.

In step J230, the safety monitoring device 100 determines whether or not the balance weight emergency stop operation command 121 or the car emergency stop operation command 111 is output. If neither the balance weight emergency stop operation command 121 nor the car emergency stop operation command 111 is output in step J230, the safety monitoring device 100 performs the process of step J200. When the balance weight emergency stop operation command 121 or the car emergency stop operation command 111 is output in step J230, the safety monitoring device 100 ends the process while maintaining the corresponding output.

Note that the preset value is set to be higher than the acceleration generated by driving or braking by the hoisting machine 4. The preset value is higher than the acceleration generated by the user or luggage getting on and off the car 1, the acceleration / deceleration of the car 1 at the time of power failure or stop, the jump inside the user car 1, and the shaking of the building. It is said that. For example, the preset value is set to be a value of gravitational acceleration in consideration of some errors.

According to the second embodiment described above, when the acceleration of the car 1 becomes an upward acceleration higher than that generated by the driving force or the braking force of the hoisting machine 4, the safety monitoring device 100 has an upward acceleration. The balance weight emergency stop 21 is operated. Therefore, a decrease in tension of the main rope 3 can be easily detected. By relaxing the strength design standard, it is possible to realize the simplification of the balance weight 2.

Further, the safety monitoring device 100 operates the car emergency stop 11 when the acceleration of the car 1 becomes a downward acceleration higher than that generated by the driving force or the braking force of the hoisting machine 4. Therefore, a decrease in tension of the main rope 3 can be easily detected. By relaxing the strength design standard, it is possible to realize the simplification of the car 1.

In this case, the acceleration of the car 1 is obtained from the car acceleration sensor 15. Therefore, the sensors can be integrated into the car 1. As a result, the wiring work of the cable is reduced, and the sensors can be easily installed.

Here, as an event in which an acceleration that reaches an upward gravitational acceleration acts on the descending car 1, it is assumed that the car 1 collides with the car shock absorber 12. As an event in which an acceleration that reaches a downward gravitational acceleration acts on the ascending car 1, it is assumed that the balance weight 2 collides with the balance weight shock absorber 22. Therefore, in the second embodiment, not only the same effect as that of the first embodiment can be obtained, but also the same effect can be obtained in case of an event other than the collision with each shock absorber.

Embodiment 3.
FIG. 8 is a configuration diagram of the elevator device according to the third embodiment. The same or corresponding parts as those of the first embodiment or the second embodiment are designated by the same reference numerals. The explanation of the relevant part is omitted.

In the third embodiment, the balance weight emergency stop 21 is not connected to the safety monitoring device 100.

The emergency stop drive mass body 211, the emergency stop drive elastic body 212, and the emergency stop drive connection mechanism 213 are provided on the upper part of the balance weight 2. The emergency stop drive mass body 211, the emergency stop drive elastic body 212, and the emergency stop drive connection mechanism 213 are provided so as to be able to mechanically drive the balance weight emergency stop 21. For example, the emergency stop drive mass body 211, the emergency stop drive elastic body 212, and the emergency stop drive connection mechanism 213 operate on the principle shown in International Publication No. 2016/162946.

Specifically, the braking member of the balance weight emergency stop 21 is connected to the emergency stop drive mass body 211 via the emergency stop drive connection mechanism 213. The emergency stop drive mass body 211 is provided on the balance weight 2 via the emergency stop drive elastic body 212. When the value of the downward acceleration of the balance weight 2 exceeds a preset value, the braking member of the balance weight emergency stop 21 has an upward inertial force generated in the emergency stop drive mass body 211 and an emergency stop drive elastic body. It operates by being displaced via the emergency stop drive connecting mechanism 213 by the elastic restoring force of 212.

If the car 1 should pass the lowest floor, the car 1 will collide with the car shock absorber 12. At this time, the car 1 is slowly stopped by the buffering effect of the car shock absorber 12.

In the process of gently stopping the car 1, a shockingly high deceleration exceeding the gravitational acceleration may occur momentarily. At this time, the deceleration of the balance weight 2 does not exceed the gravitational acceleration. Therefore, the tension of the main rope 3 connecting the car 1 and the balance weight 2 is reduced or lost, and the balance weight 2 jumps. In this case, a downward gravitational acceleration is generated in the balance weight 2. As a result, the balance weight emergency stop 21 operates.

While the balance weight 2 is rising, the balance weight emergency stop 21 does not generate braking force. When the balance weight 2 turns downward, the balance weight emergency stop 21 generates a braking force. As a result, the balance weight emergency stop 21 holds the balance weight 2 before the tension of the main rope 3 is restored. As a result, the swing-back of the balance weight 2 is suppressed. At this time, a strong impact tension does not act on the main rope 3.

If car 1 should pass the top floor, car 1 will be braked by the brakes 41a and 41b. After that, the balance weight 2 collides with the balance weight shock absorber 22. As a result, the balance weight 2 is gently stopped by the buffering effect of the balance weight shock absorber 22.

In the process of the balance weight 2 stopping gently, a shocking high deceleration exceeding the gravitational acceleration may occur momentarily. However, the deceleration of the car 1 does not exceed the gravitational acceleration. Therefore, the tension of the main rope 3 connecting the car 1 and the balance weight 2 is reduced or lost, and the car 1 jumps.

At this time, when the safety monitoring device 100 detects that the balance weight 2 has collided with the balance weight shock absorber 22, the car emergency stop 11 is operated.

While the car 1 is rising, the car emergency stop 11 does not generate braking force. When the car 1 turns downward, the car emergency stop 11 generates a braking force. The car emergency stop 11 holds the car 1 before the tension of the main rope 3 is restored. As a result, the swinging back of the car 1 is suppressed. At this time, a strong impact tension does not act on the main rope 3.

Next, an example of abnormality monitoring by the safety monitoring device 100 will be described with reference to FIG.
FIG. 9 is a flowchart for explaining an example of abnormality monitoring by the safety monitoring device of the elevator device according to the third embodiment.

The safety monitoring device 100 continues processing until it reaches End from Start when it is started.

In step J300, the safety monitoring device 100 determines whether or not the car 1 is stopped.

When the car 1 is stopped in step J300, the safety monitoring device 100 performs the process of step J310. In step J310, the safety monitoring device 100 determines whether or not the car shock absorber switch 13 is OFF.

When the car shock absorber switch 13 is turned off in step J310, the safety monitoring device 100 determines that the buffer stroke of the car shock absorber 12 is not sufficiently held. In this case, the safety monitoring device 100 performs the process of step P310. In step P310, the safety monitoring device 100 outputs a car emergency stop operation command 111 for operating the car emergency stop 11.

If the car 1 is not stopped in step J300, the safety monitoring device 100 performs the process of step J311. In step J311 the safety monitoring device 100 determines whether or not the switching of the balance weight shock absorber switch 23 from ON to OFF is detected.

When the switching of the balance weight shock absorber switch 23 from ON to OFF is detected in step J311, the safety monitoring device 100 determines that the balance weight 2 has collided with the balance weight shock absorber 22. In this case, the safety monitoring device 100 performs the process of step P311. In step P311, the safety monitoring device 100 outputs a car emergency stop operation command 111 for operating the car emergency stop 11.

If the car shock absorber switch 13 is not OFF in step J310, or after step P310, or if switching of the balance weight shock absorber switch 23 from ON to OFF is not detected in step J311 or after step P311, the safety monitoring device 100 sets the safety monitoring device 100. The process of step J320 is performed.

In step J320, the safety monitoring device 100 determines whether or not the car emergency stop operation command 111 is output. If the car emergency stop operation command 111 is not output in step J320, the safety monitoring device 100 performs the process of step J300. When the car emergency stop operation command 111 is output in step J320, the safety monitoring device 100 ends the process while maintaining the output of the car emergency stop operation command 111.

According to the third embodiment described above, when the safety monitoring device 100 detects that the balance weight 2 collides with the balance weight shock absorber 22 while the car 1 is traveling, the car emergency stop 11 is used. The car emergency stop 11 is operated when the compression operation of the car shock absorber 12 is detected while the car 1 is stopped. Therefore, it is possible to eliminate the need for wiring to the balance weight 2.

As described above, the elevator device of the present disclosure can be used for the elevator system.

1 car, 2 balance weight, 3 main memory, 4 hoisting machine, 5 hoisting wheel, 6 swaying car, 11 car emergency stop, 12 car shock absorber, 13 car shock absorber switch, 14 car position speed sensor, 21 balance Weight emergency stop, 22 balance weight shock absorber, 23 balance weight shock absorber switch, 41a brake, 41b brake, 100 safety monitoring device, 111 car emergency stop operation command, 113 car shock absorber switch operation signal, 114 car position speed sensor signal, 121 Balance weight emergency stop operation command, 123 Balance weight shock absorber switch operation signal, 141 Brake operation command, 211 Emergency stop drive mass body, 212 Emergency stop drive elastic body, 213 Emergency stop drive connection mechanism, 300a processor, 300b Memory, 400 hardware

Claims (11)

A basket provided so that the inside of the elevator hoistway can be moved up and down,
With a balance weight provided so that the inside of the hoistway can be moved up and down,
The main rope that connects the basket and the balance weight,
A hoist that applies driving force or braking force to the main rope,
A car emergency stop that is effective against the lowering of the car,
An emergency stop for the balance weight that is effective against the descent of the balance weight,
A safety monitoring device that suppresses the swinging back of the car or the balance weight by operating the car emergency stop or the balance weight emergency stop when an abnormality causing a decrease in tension of the main rope is detected.
Elevator device equipped with. The safety monitoring device according to claim 1 operates the balance weight emergency stop when the acceleration of the car becomes an upward acceleration higher than that generated by the driving force or the braking force of the hoisting machine. Elevator device described. The safety monitoring device according to claim 1, wherein the car emergency stop is operated when the acceleration of the car becomes a downward acceleration higher than that generated by the driving force or the braking force of the hoisting machine. Elevator device. When the acceleration of the car becomes an upward acceleration higher than that generated by the driving force or the braking force of the hoisting machine, the safety monitoring device operates the balance weight emergency stop to operate the car. The elevator device according to claim 1, wherein the car emergency stop is operated when the acceleration becomes a downward acceleration higher than that generated by the driving force or the braking force of the hoisting machine. A car shock absorber compatible with the above car,
With
The elevator device according to claim 2, wherein the safety monitoring device operates the balance weight emergency stop when it detects that the car has collided with the car shock absorber. Balance weight shock absorber corresponding to the balance weight,
With
The elevator device according to claim 3, wherein the safety monitoring device operates the car emergency stop when it detects that the balance weight collides with the balance weight shock absorber. A car shock absorber compatible with the above car,
A balance weight shock absorber corresponding to the balance weight,
With
The safety monitoring device operates the balance weight emergency stop when it detects that the car has collided with the car shock absorber, and when it detects that the balance weight has collided with the balance weight shock absorber, the safety monitoring device operates the balance weight emergency stop. The elevator device according to claim 4, wherein the car emergency stop is operated. When the safety monitoring device detects the compression operation of the car shock absorber while the car is running, the safety monitoring device operates the balance weight emergency stop, and performs the compression operation of the car shock absorber while the car is stopped. The elevator device according to claim 5, wherein the car emergency stop is operated when it is detected. The safety monitoring device operates the car emergency stop when the compression operation of the balance weight shock absorber is detected while the car is running, and the compression operation of the balance weight shock absorber while the car is stopped. The elevator device according to claim 6, wherein the balance weight emergency stop is operated when the above is detected. The safety monitoring device provides the balance weight when the acceleration of the car is higher than that generated by the driving force or the braking force of the hoisting machine when the car is descending. When the emergency stop is operated and the acceleration of the car becomes a downward acceleration higher than that generated by the driving force or the braking force of the hoisting machine when the car is rising, the car emergency The elevator device according to claim 4, wherein the stop is operated. A car shock absorber compatible with the above car,
A balance weight shock absorber corresponding to the balance weight,
With
When the safety monitoring device detects that the balance weight collides with the balance weight shock absorber while the car is running, the safety monitoring device operates the car emergency stop and cushions the car while the car is stopped. The elevator device according to claim 1, wherein the car emergency stop is operated when a compression operation of the vessel is detected.

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