JP7355231B2 - elevator equipment - Google Patents

Description

The present disclosure relates to an elevator device.

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

Japanese Patent Publication No. 2011-121726

However, the elevator apparatus described in Patent Document 1 does not take any measures against the collision of the car or the counterweight with the shock absorber. Therefore, when one of the car and the counterweight collides with the buffer, the other of the car and the counterweight jumps. Impulsive tension on the main rope can then occur.

The present disclosure has been made to solve the above problems. An object of the present disclosure is to provide an elevator device that can suppress the generation of impulsive tension on the main rope.

An elevator device according to the present disclosure includes: a car provided to be able to move up and down inside a hoistway of an elevator; a counterweight provided to be able to move up and down inside the hoistway; a hoisting machine that provides driving force or braking force to the main rope, a car emergency stop that is effective against the descent of the car, and a counterbalance that is effective against the descent of the counterweight. Weight emergency stop and safety that suppresses the swinging back of the car or the counterweight by operating the car emergency stop or the counterweight emergency stop when an abnormality that causes a decrease in the tension of the main rope is detected. Equipped with a monitoring device.
The elevator device according to the present disclosure further includes a car shock absorber corresponding to the car, and the safety monitoring device adjusts the balance when a compression operation of the car shock absorber is detected while the car is running. A weight emergency stop may be operated, and the car emergency stop may be operated when a compression operation of the car shock absorber is detected while the car is stopped.
Alternatively, the elevator device according to the present disclosure further includes a counterweight buffer corresponding to the counterweight, and the safety monitoring device detects a compression operation of the counterweight buffer while the car is traveling. The car emergency stop may be operated when the car is stopped, and the counterweight emergency stop may be operated when a compression operation of the counterweight shock absorber is detected while the car is stopped.
Alternatively, the elevator device according to the present disclosure further includes a car shock absorber corresponding to the car, and a balance weight shock absorber corresponding to the counterweight, and the safety monitoring device is configured to operate when the car is running. The car emergency stop is operated when it is detected that the counterweight has collided with the balance weight buffer, and the car emergency stop is activated when a compression operation of the car buffer is detected while the car is stopped. It may be something that operates.

According to the present disclosure, when the safety monitoring device detects an abnormality that causes a decrease in the tension of the main rope, the safety monitoring device operates the car emergency stop or the counterweight emergency stop to suppress the swinging back of the car or the counterweight. . Therefore, it is possible to suppress the generation of impactive tension on the main rope.

1 is a configuration diagram of an elevator device in Embodiment 1. FIG. FIG. 3 is a diagram for explaining a first example of abnormality monitoring by the safety monitoring device of the elevator device in the first embodiment. FIG. 7 is a diagram for explaining a second example of abnormality monitoring by the safety monitoring device of the elevator device in the first embodiment. 7 is a flowchart for explaining a third example of abnormality monitoring by the safety monitoring device of the elevator device in the first embodiment. 1 is a hardware configuration diagram of a safety monitoring device for an elevator device in Embodiment 1. FIG. FIG. 2 is a configuration diagram of an elevator device in a second embodiment. 7 is a flowchart for explaining an example of abnormality monitoring by the safety monitoring device of the elevator device in Embodiment 2. FIG. FIG. 7 is a configuration diagram of an elevator device in Embodiment 3. 12 is a flowchart for explaining an example of abnormality monitoring by the safety monitoring device of the elevator device in Embodiment 3.

Embodiments will be described according to the attached drawings. In each figure, the same or corresponding parts are given the same reference numerals. Duplicate explanations of the relevant parts will be simplified or omitted as appropriate.

Embodiment 1.
FIG. 1 is a configuration diagram of an elevator device in Embodiment 1.

In the elevator system shown in FIG. 1, an elevator car 1 and a counterweight 2 are provided inside a hoistway (not shown).

The main rope 3 connects the car 1 and the counterweight 2. The hoist 4 is provided in a machine room (not shown). The hoisting machine 4 includes a hoisting pulley 5 and a deflection wheel 6. A hoisting motor (not shown) is arranged coaxially with the hoisting pulley 5. The hoisting pulley 5 and the diversion wheel 6 maintain the state in which the main rope 3 is wound around them. The brake 41a and the brake 41b are provided on the hoisting machine 4.

The car emergency stop 11 is provided at the bottom of the car 1. The counterweight emergency stop 21 is provided at the bottom of the counterweight 2.

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

The car position and speed sensor 14 is provided at the top of the car 1.

The hoist 4 provides driving force or 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 counterweight 2 move up and down in opposite directions.

The brakes 41a and 41b are operated via the hoisting pulley 5 and the main rope 3 as necessary.

The car emergency stop 11 applies a braking force directly to the car 1 as necessary. For example, the car emergency stop 11 is effective when the main rope 3 becomes loose or breaks. Note that the car emergency stop 11 is structured to generate braking force only when the car 1 is descending.

The counterweight emergency stop 21 applies a braking force directly to the counterweight 2. For example, the counterweight emergency stop 21 is effective when the main rope 3 becomes loose or breaks. The counterweight emergency stop 21 is structured to generate a braking force only when the counterweight 2 is descending.

The car shock absorber 12 cushions the impact if 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 activated due to the collision of the car 1. The car shock absorber switch 13 is in an ON state when the plunger of the car shock absorber 12 is in the initial position before being pushed in by the car 1. The car shock absorber switch 13 is switched from ON to OFF when the car shock absorber 12 operates and the plunger of the car shock absorber 12 starts to descend.

The counterweight buffer 22 cushions the impact if the counterweight 2 is about to collide with the bottom of the hoistway. The counterweight buffer switch 23 detects that the counterweight buffer 22 has been activated due to the collision of the counterweight 2. The counterweight buffer switch 23 is in the ON state when the plunger of the counterweight buffer 22 is in its initial position before being pushed in by the counterweight 2. The counterweight buffer switch 23 is switched from ON to OFF when the counterweight buffer 22 is operated and the plunger of the counterweight buffer 22 starts to descend.

The car position and speed sensor 14 transmits signals for detecting the position, running speed, and running direction of the car 1. The car position and 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, or the like.

The safety monitoring device 100 monitors abnormalities that occur in elevator equipment. For example, the safety monitoring device 100 detects the position, running speed, and running direction of the car 1 by electronically processing signals from the car position and 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 counterweight emergency stop 21.

For example, even if the car 1 were to pass through the lowest floor, it would be braked by the brakes 41a and 41b or by the car emergency stop 11. Thereafter, the car 1 collides with the car buffer 12. As a result, the car 1 comes to a gentle stop due to the cushioning effect of the car shock absorber 12.

In the process of the car 1 coming to a gentle stop, a shockingly high deceleration that exceeds the gravitational acceleration may occur instantaneously. However, the deceleration of the counterweight 2 never exceeds the gravitational acceleration. As a result, the tension in the main rope 3 connecting the car 1 and the counterweight 2 is reduced or lost, causing the counterweight 2 to jump.

In this case, the safety monitoring device 100 operates the counterweight emergency stop 21 when detecting that the car 1 has collided with the car shock absorber 12. While the counterweight 2 is rising, the counterweight emergency stop 21 does not generate any braking force. When the counterweight 2 starts to descend, the counterweight emergency stop 21 generates a braking force. Therefore, the counterweight emergency stop 21 holds the counterweight 2 before the tension in the main rope 3 is recovered. As a result, the swinging back of the counterweight 2 is suppressed. In this case, no strong impact tension is applied to the main rope 3.

For example, even if the car 1 were to pass through the top floor, it would be braked by the brakes 41a and 41b. Thereafter, the counterweight 2 collides with the counterweight buffer 22. As a result, the counterweight 2 comes to a gentle stop due to the buffering effect of the counterweight buffer 22.

In the process of the balance weight 2 slowly coming to a stop, a shockingly high deceleration that exceeds the acceleration due to gravity may occur instantaneously. However, the deceleration of car 1 never exceeds the gravitational acceleration. Therefore, the tension in the main rope 3 connecting the car 1 and the counterweight 2 is reduced or lost, causing the car 1 to jump.

In this case, the safety monitoring device 100 operates the car emergency stop 11 when detecting that the counterweight 2 has collided with the counterweight buffer 22. While the car 1 is rising, the car emergency stop 11 does not generate any braking force. When the car 1 starts to descend, the car emergency stop 11 generates a braking force. Therefore, the car emergency stop 11 holds the car 1 before the tension in the main rope 3 is restored. As a result, the swinging back of the car 1 is suppressed. At this time, no strong impact tension is applied to the main rope 3.

Next, a first example of abnormality monitoring by the safety monitoring device 100 will be described using FIG. 2.
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, a 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. A curve 1001 is the first safety monitoring standard in the safety monitoring device 100. A 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 using a car position and speed sensor signal 114 that is a signal from the car position and 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 outputs a brake operation command 141 to operate the brakes 41a and 41b. 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 a 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 to become lower as the position of collision with the car shock absorber 12 approaches. Therefore, even if the speed value of car 1 exceeds the value of curve 1000 and approaches the bottom floor at a high speed, the speed at which car 1 collides with car buffer 12 is reduced. Expected to be effective.

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

In FIG. 3, a 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 counterweight 2 collides with the counterweight buffer 22. Curve 2001 is the first safety monitoring standard in safety monitoring device 100. Straight line 2002 is the third safety monitoring standard in safety monitoring device 100. The third safety monitoring standard is set higher than the first safety monitoring standard.

Safety monitoring device 100 detects the position of car 1 and the speed of car 1 using input signals from car position and 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 outputs a brake operation command 141 to operate the brakes 41a and 41b. When the speed of the car 1 exceeds the third safety monitoring standard, the safety monitoring device 100 operates the counterweight emergency stop 21 by outputting a counterweight 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 become lower as they approach the top floor position. Therefore, even if the speed value of car 1 exceeds the value of curve 2000 and it approaches the top floor at a high speed, the height at which car 1 passes the top floor and jumps will be lowered. expected to have a suppressive effect.

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

When the safety monitoring device 100 is activated, it continues processing from Start until reaching End.

Specifically, in step J100, safety monitoring device 100 determines whether car 1 is stopped.

If the car 1 is stopped in step J100, the safety monitoring device 100 performs the process in step J110. In step J110, safety monitoring device 100 determines whether car buffer switch 13 is OFF.

If the car shock absorber switch 13 is OFF in step J110, the safety monitoring device 100 determines that the buffer stroke of the car shock absorber 12 is not maintained sufficiently. 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 the counterweight shock absorber switch 23 is OFF.

If the counterweight buffer switch 23 is OFF in step J120, the safety monitoring device 100 determines that the buffer stroke of the counterweight buffer switch 23 is not maintained sufficiently. In this case, the safety monitoring device 100 performs the process of step P120. In step P120, the safety monitoring device 100 outputs a counterweight emergency stop operation command 121 for operating the counterweight emergency stop 21.

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

If switching from ON to OFF of the car shock absorber switch 13 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 counterweight emergency stop operation command 121 for operating the counterweight emergency stop 21.

If switching from ON to OFF of the car shock absorber switch 13 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 switching of the counterweight buffer switch 23 from ON to OFF has been detected.

If switching from ON to OFF of the counterweight buffer switch 23 is detected in step J111, the safety monitoring device 100 determines that the counterweight 2 has collided with the counterweight buffer 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 counterweight buffer switch 23 is not OFF in step J120, if switching from ON to OFF of the counterweight buffer switch 23 is not detected in step J111 after step P120, after step P111, the safety monitoring device 100 , performs the process of step J130.

In step J130, the safety monitoring device 100 determines whether the counterweight emergency stop operation command 121 or the car emergency stop operation command 111 is output. If neither the counterweight 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. If the counterweight 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 counterweight emergency stop 21 when detecting an abnormality that causes a decrease in the tension of the main rope 3. To suppress swinging back of the car 1 or the counterweight 2. Therefore, it is possible to suppress the generation of strong impactive tension on the main rope 3. As a result, the strength design criteria for the car 1, counterweight 2, and hoist 4 that are directly connected to the main rope 3 can be relaxed. By relaxing strength design standards, these devices can be made simpler, smaller, and lower in cost.

For example, the safety monitoring device 100 operates the counterweight emergency stop 21 when detecting that the car 1 has collided with the car shock absorber 12. Therefore, when a high upward acceleration of the car 1 occurs, it is possible to suppress the counterweight 2 from swinging back. As a result, it is possible to simplify the counterweight 2 and the hoist 4 by relaxing the strength design criteria.

For example, the safety monitoring device 100 operates the car emergency stop 11 when detecting that the counterweight 2 has collided with the counterweight buffer 22. Therefore, when a high upward acceleration of the counterweight 2 occurs, it is possible to suppress the car 1 from swinging back. As a result, the car 1 and the hoist 4 can be simplified by relaxing the strength design criteria.

Furthermore, the safety monitoring device 100 operates the counterweight emergency stop 21 when detecting the compression operation of the car shock absorber 12 while the car 1 is running, and compresses the car shock absorber 12 while the car 1 is stopped. When the movement is detected, the car emergency stop 11 is activated. Therefore, not only can the swinging back of the counterweight 2 be suppressed when a high upward acceleration of the car 1 occurs, but also when the car 1 is in a state where the capacity of the car shock absorber 12 is insufficient, collision can be avoided. As a result, the car 1 and the counterweight 2 can be simplified by relaxing the strength design criteria.

Furthermore, the safety monitoring device 100 operates the car emergency stop 11 when it detects the compression operation of the counterweight shock absorber 22 while the car 1 is running, and controls the counterweight shock absorber 22 while the car 1 is stopped. When a compression operation is detected, the counterweight emergency stop 21 is operated. Therefore, not only can the rocking back of the car 1 be suppressed when a high upward acceleration of the counterweight 2 occurs, but also the counterweight 2 can be prevented from swinging back even when the counterweight buffer 22 has insufficient capacity. Collision with the buffer 22 can be avoided. As a result, the car 1 and the counterweight 2 can be simplified by relaxing the strength design criteria.

In addition, in FIG. 4, the determination criterion in the process of step J121 may be changed to "Has the car passed the top floor?" In this case, the counterweight emergency stop 21 can be operated more quickly. As a result, generation of strong impactive 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 "Has the car passed the lowest floor?". In this case, the car emergency stop 11 can be operated more quickly. As a result, generation of strong impactive tension on the main rope 3 can be more reliably suppressed.

Next, an example of the safety monitoring device 100 will be described using FIG. 5.
FIG. 5 is a hardware configuration diagram of a safety monitoring device for an 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 circuitry includes at least one processor 300a and at least one memory 300b. For example, the processing circuitry includes 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 software and firmware is stored in at least one memory 300b. At least one processor 300a implements 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, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. For example, at least one memory 300b is a nonvolatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, EEPROM, etc., a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD, etc.

If the processing circuitry comprises at least one dedicated hardware 400, the processing circuitry may be implemented, for example, in a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof. Ru. 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.

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

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

Embodiment 2.
FIG. 6 is a configuration diagram of an elevator device in the second embodiment. Note that parts that are the same as or equivalent to those in Embodiment 1 are given the same reference numerals. Description of this part will be omitted.

The elevator apparatus of the second embodiment is an apparatus in which a car acceleration sensor 15 is added to the elevator apparatus of the first embodiment. The car acceleration sensor 15 is provided at the top of the car 1. The car acceleration sensor 15 detects the acceleration of the car 1.

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

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

During the descent of the car 1, when a high acceleration that reaches upward gravitational acceleration is applied, the tension in the main rope 3 decreases. In this case, the counterweight 2 jumps. At this timing, the counterweight emergency stop 21 operates. As a result, the swinging back of the counterweight 2 is suppressed.

When the cushioning stroke of the car shock absorber 12 is insufficient, the safety monitoring device 100 operates the car emergency stop 11 to prevent the car 1 from colliding with the car shock absorber 12 at high speed.

During the ascent of the car 1, when a high acceleration that reaches the downward gravitational acceleration is applied, the tension in the main rope 3 decreases. In this case, 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 using FIG. 7.
FIG. 7 is a flowchart for explaining an example of abnormality monitoring by the safety monitoring device of the elevator device in the second embodiment.

When the safety monitoring device 100 is activated, it continues processing from Start until reaching End.

Specifically, in step J200, safety monitoring device 100 determines whether car 1 is stopped.

If the car 1 is stopped in step J200, the safety monitoring device 100 performs the processing in step J210. In step J210, the safety monitoring device 100 determines whether the car shock absorber switch 13 is OFF.

If the car shock absorber switch 13 is OFF in step J210, the safety monitoring device 100 determines that the buffer stroke of the car shock absorber 12 is not maintained sufficiently. 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 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 the counterweight shock absorber switch 23 is OFF.

If the counterweight buffer switch 23 is OFF in step J220, the safety monitoring device 100 determines that the buffer stroke of the counterweight buffer switch 23 is not maintained sufficiently. In this case, the safety monitoring device 100 performs the process of step P220. In step P220, the safety monitoring device 100 outputs a counterweight emergency stop operation command 121 for operating the counterweight emergency stop 21.

If the car 1 is not stopped in step J200, the safety monitoring device 100 performs the processing in step J211. In step J211, the safety monitoring device 100 uses the car position and speed sensor signal 114 output from the car position and speed sensor 14 to determine whether the car 1 is rising.

If the car 1 is raised in step J211, the safety monitoring device 100 performs the processing in step J212. In step J212, the safety monitoring device 100 uses the car acceleration sensor signal 115 to determine whether 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 ascending in step J211, or if 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 uses the car position and speed sensor signal 114 output from the car position and speed sensor 14 to determine whether the car 1 is descending.

If the car 1 is lowered in step J221, the safety monitoring device 100 performs the processing in step J222. In step J222, the safety monitoring device 100 uses the car acceleration sensor signal 115 to determine whether 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 counterweight emergency stop operation command 121 for operating the counterweight emergency stop 21.

If the counterweight buffer switch 23 is not OFF in step J220, if the car 1 is not lowered in step J221 after step P220, then in step J222 the upward acceleration of the car 1 is less than a 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 the counterweight emergency stop operation command 121 or the car emergency stop operation command 111 is output. If neither the counterweight 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. If the counterweight 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 higher than the acceleration generated by driving or braking by the hoisting machine 4. The preset value is a value higher than the acceleration caused by users or luggage getting on and off the car 1, acceleration or deceleration of the car 1 during a power outage or stop, a user jumping inside the car 1, or the shaking of the building. It is said that For example, the preset value is approximately the value of gravitational acceleration, taking into account some errors.

According to the second embodiment described above, when the acceleration of the car 1 becomes higher than that generated by the driving force or braking force of the hoisting machine 4, the safety monitoring device 100 The counterweight emergency stop 21 is activated. Therefore, a decrease in tension in the main rope 3 can be easily detected. By relaxing the strength design criteria, the counterweight 2 can be simplified.

Furthermore, the safety monitoring device 100 operates the car emergency stop 11 when the acceleration of the car 1 becomes a higher downward acceleration than that generated by the driving force or braking force of the hoist 4. Therefore, a decrease in tension in the main rope 3 can be easily detected. By relaxing the strength design criteria, the car 1 can be simplified.

In this case, the acceleration of the car 1 is obtained from the car acceleration sensor 15. Therefore, sensors can be integrated into the car 1. As a result, the cable wiring work is reduced, making it easier to install sensors.

Here, a case where the car 1 collides with the car shock absorber 12 is assumed to be an event in which an acceleration that reaches the upward gravitational acceleration acts on the car 1 while it is descending. An example of an event in which an acceleration reaching the downward gravitational acceleration acts on the ascending car 1 is a case in which the counterweight 2 collides with the counterweight buffer 22. Therefore, in the second embodiment, not only can the same effects as in the first embodiment be obtained, but also the same effects can be obtained in the event of an event other than a collision with each shock absorber.

Embodiment 3.
FIG. 8 is a configuration diagram of an elevator device in Embodiment 3. Note that parts that are the same as or equivalent to those in Embodiment 1 or Embodiment 2 are given the same reference numerals. Description of this part will be omitted.

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

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

Specifically, the braking member of the counterweight emergency stop 21 is operatively connected to the emergency stop driving mass body 211 via the emergency stop driving coupling mechanism 213. The emergency stop driving mass body 211 is provided on the counterweight 2 via the emergency stop driving elastic body 212. When the value of the downward acceleration of the counterweight 2 exceeds a preset value, the braking member of the counterweight emergency stop 21 combines the upward inertia force generated in the emergency stop driving mass body 211 with the emergency stop driving elastic body. It operates by being displaced via the emergency stop drive coupling mechanism 213 due to the elastic restoring force of the emergency stop drive 212 .

If car 1 were to pass through the lowest floor, it would collide with car buffer 12. At this time, the car 1 comes to a gentle stop due to the cushioning effect of the car shock absorber 12.

In the process of the car 1 coming to a gentle stop, a shockingly high deceleration that exceeds the gravitational acceleration may occur instantaneously. At this time, the deceleration of the counterweight 2 does not exceed the gravitational acceleration. As a result, the tension in the main rope 3 connecting the car 1 and the counterweight 2 is reduced or lost, causing the counterweight 2 to jump. In this case, downward gravitational acceleration is generated in the counterweight 2. As a result, the counterweight emergency stop 21 operates.

While the counterweight 2 is rising, the counterweight emergency stop 21 does not generate any braking force. When the counterweight 2 starts to descend, the counterweight emergency stop 21 generates a braking force. As a result, the counterweight emergency stop 21 holds the counterweight 2 before the tension in the main rope 3 is restored. As a result, the swinging back of the counterweight 2 is suppressed. At this time, no strong impact tension acts on the main rope 3.

If the car 1 were to pass through the top floor, the car 1 would be braked by the brakes 41a and 41b. Thereafter, the counterweight 2 collides with the counterweight buffer 22. As a result, the counterweight 2 comes to a gentle stop due to the buffering effect of the counterweight buffer 22.

In the process of the balance weight 2 slowly coming to a stop, a shockingly high deceleration that exceeds the acceleration due to gravity may occur instantaneously. However, the deceleration of car 1 never exceeds the gravitational acceleration. Therefore, the tension in the main rope 3 connecting the car 1 and the counterweight 2 is reduced or lost, causing the car 1 to jump.

At this time, when the safety monitoring device 100 detects that the counterweight 2 has collided with the counterweight buffer 22, it operates the car emergency stop 11.

While the car 1 is rising, the car emergency stop 11 does not generate any braking force. When the car 1 starts to descend, the car emergency stop 11 generates a braking force. The car emergency stop 11 holds the car 1 before the tension in the main rope 3 is restored. As a result, the swinging back of the car 1 is suppressed. At this time, no strong impact tension acts on the main rope 3.

Next, an example of abnormality monitoring by the safety monitoring device 100 will be described using FIG. 9.
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.

When the safety monitoring device 100 is activated, it continues processing from Start until reaching End.

In step J300, safety monitoring device 100 determines whether car 1 is stopped.

If the car 1 is stopped in step J300, the safety monitoring device 100 performs the processing in step J310. In step J310, safety monitoring device 100 determines whether car buffer switch 13 is OFF.

If the car shock absorber switch 13 is OFF in step J310, the safety monitoring device 100 determines that the buffer stroke of the car shock absorber 12 is not maintained sufficiently. 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 processing in step J311. In step J311, the safety monitoring device 100 determines whether switching of the counterweight buffer switch 23 from ON to OFF has been detected.

If switching from ON to OFF of the counterweight buffer switch 23 is detected in step J311, the safety monitoring device 100 determines that the counterweight 2 has collided with the counterweight buffer 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 from ON to OFF of the counterweight shock absorber switch 23 is not detected in step J311, or after step P311, the safety monitoring device 100: The process of step J320 is performed.

In step J320, the safety monitoring device 100 determines whether the car emergency stop operation command 111 is being output. If the car emergency stop operation command 111 is not output in step J320, the safety monitoring device 100 performs the processing in step J300. If the car emergency stop operation command 111 has been 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, the safety monitoring device 100 activates the car emergency stop 11 when it is detected that the counterweight 2 has collided with the counterweight buffer 22 while the car 1 is running. When the compressing operation of the car shock absorber 12 is detected while the car 1 is stopped, the car emergency stop 11 is activated. Therefore, wiring to the counterweight 2 can be made unnecessary.

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

1 Car, 2 Balancing weight, 3 Main rope, 4 Hoisting machine, 5 Hoisting pulley, 6 Deflection wheel, 11 Car emergency stop, 12 Car shock absorber, 13 Car shock absorber switch, 14 Car position speed sensor, 21 Balance weight emergency stop, 22 counterweight shock absorber, 23 counterweight 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 coupling mechanism, 300a Processor, 300b memory, 400 hardware

Claims (10)

A cage provided to be able to go up and down the inside of an elevator hoistway,
a counterweight provided to be able to move up and down inside the hoistway;
a main rope connecting the cage and the counterweight;
a hoisting machine that applies driving force or braking force to the main rope;
a car emergency stop that is effective against the descent of the car;
a counterweight emergency stop effective against the descending of the counterweight;
a car position and speed sensor that is provided on the car and outputs a signal for detecting the position or speed of the car;
When an abnormality that causes a decrease in the tension of the main rope is detected using the signal output by the car position and speed sensor, the car or the balance weight is activated by operating the car emergency stop or the counterweight emergency stop. A safety monitoring device that suppresses the swinging back of the weight,
a car buffer compatible with the car;
Equipped with
The safety monitoring device operates the counterweight emergency stop when detecting a compression operation of the car shock absorber while the car is running, and operates the counterweight emergency stop to prevent the compression operation of the car shock absorber while the car is stopped. An elevator device that operates the car emergency stop when detected . A cage provided to be able to go up and down the inside of an elevator hoistway,
a counterweight provided to be able to move up and down inside the hoistway;
a main rope connecting the cage and the counterweight;
a hoisting machine that applies driving force or braking force to the main rope;
a car emergency stop that is effective against the descent of the car;
a counterweight emergency stop effective against the descending of the counterweight;
a car position and speed sensor that is provided on the car and outputs a signal for detecting the position or speed of the car;
When an abnormality that causes a decrease in the tension of the main rope is detected using the signal output by the car position and speed sensor, the car or the balance weight is activated by operating the car emergency stop or the counterweight emergency stop. A safety monitoring device that suppresses the swinging back of the weight,
a counterweight buffer compatible with the counterweight;
Equipped with
The safety monitoring device operates the car emergency stop when it detects a compression operation of the counterweight buffer while the car is running, and detects the compression operation of the counterweight buffer while the car is stopped. An elevator device that operates the counterweight emergency stop when the counterweight emergency stop is detected . A cage provided to be able to go up and down the inside of an elevator hoistway,
a counterweight provided to be able to move up and down inside the hoistway;
a main rope connecting the cage and the counterweight;
a hoisting machine that applies driving force or braking force to the main rope;
a car emergency stop that is effective against the descent of the car;
a counterweight emergency stop effective against the descending of the counterweight;
a car position and speed sensor that is provided on the car and outputs a signal for detecting the position or speed of the car;
When an abnormality that causes a decrease in the tension of the main rope is detected using the signal output by the car position and speed sensor, the car or the balance weight is activated by operating the car emergency stop or the counterweight emergency stop. A safety monitoring device that suppresses the swinging back of the weight,
a car buffer compatible with the car;
a counterweight buffer compatible with the counterweight;
Equipped with
The safety monitoring device operates the car emergency stop when detecting that the counterweight has collided with the counterweight buffer while the car is running, and operates the car emergency stop while the car is stopped. An elevator device that operates the car emergency stop when a compressing operation of a car is detected . 2. The safety monitoring device according to claim 1, wherein the safety monitoring device operates the counterweight emergency stop when the acceleration of the car becomes an upward acceleration higher than that generated by the driving force or braking force of the hoisting machine. Elevator equipment as described. The safety monitoring device operates the car emergency stop when the acceleration of the car becomes a downward acceleration higher than that generated by the driving force or braking force of the hoisting machine. elevator equipment. The safety monitoring device operates the counterweight emergency stop when the acceleration of the car becomes an upward acceleration higher than that generated by the driving force or braking force of the hoisting machine. The elevator system according to claim 1 or 2 , wherein the car emergency stop is activated when the acceleration becomes higher downward than that generated by the driving force or braking force of the hoisting machine. 5. The elevator system according to claim 4 , wherein the safety monitoring device operates the counterweight emergency stop when detecting that the car has collided with the car shock absorber. 6. The elevator system according to claim 5 , wherein the safety monitoring device operates the car emergency stop when detecting that the counterweight has collided with the counterweight shock absorber. a car buffer compatible with the car;
a counterweight buffer compatible with the counterweight;
Equipped with
The safety monitoring device operates the counterweight emergency stop when detecting that the car has collided with the car buffer, and operates the counterweight emergency stop when detecting that the counterweight has collided with the counterweight buffer. The elevator device according to claim 6 , which operates a car emergency stop. The safety monitoring device is configured to control the counterweight when the car is lowered and the acceleration of the car becomes higher than that generated by the driving force or braking force of the hoisting machine. If the emergency stop is activated and the acceleration of the car becomes higher in the downward direction than that generated by the driving force or braking force of the hoist while the car is rising, the car emergency stop is activated. 7. The elevator system according to claim 6 , which operates a stop.

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