JP2009220904A - Elevator system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator system capable of precisely calculating a position and a speed of a car or a counter weight, and thereby safely controlling the car or the counter weight. <P>SOLUTION: This elevator system has an elevator car 12, a hoisting machine 32 for elevating the car 12 in a hoistway 11, and a counter weight 18 connected to the car 12 via a main rope 25. Also, acceleration sensors 16a, 16b for detecting the acceleration of the car 12 or the counter weight 18 are provided, and a control device 26 is connected to the acceleration sensors 16a, 16b. The control device 26 precisely calculates the position of the car 12 or the counter weight 18 by integrating twice the acceleration of the car 12 or the counter weight 18 transmitted from the acceleration sensors 16a, 16b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevator system having an elevator car, a hoisting machine for raising and lowering a car in a hoistway, and a counterweight connected to the car via a main rope. The present invention relates to an elevator system that detects acceleration of a car or a counterweight.

  A conventional elevator system is shown in FIG. In FIG. 9, the speed governor (governor device) 27 detects that the speed of the car 12 is abnormal. When the governor device 27 detects that the speed of the car 12 exceeds a certain value, the safety devices (safety) 30a, 30b provided at the lower part of the car 12 are operated, and the safety devices 30a, 30b are operated by the guide rail 14a. , 14b and the car 12 is stopped. A hoisting machine braking device (brake) 35 is connected to the hoisting machine 32. A rope brake 39 is provided for holding the main rope 25 and stopping the car 12 if the car 12 starts moving when the hoisting machine braking device 35 is closed.

  By the way, in the conventional elevator system, the position of the car 12 is calculated by detecting the rotation speed of the motor 21 of the hoisting machine 32 by the motor pulse generator 22 provided in the motor 21. However, it may occur that the main rope 25 stretches or slips or the sheave 20 of the hoisting machine 32 wears and the sheave diameter decreases. In this case, even if an attempt is made to calculate the position of the car 12 based on the number of revolutions of the motor 21, there is a possibility that a deviation occurs between the calculated position of the car 12 and the actual position of the car 12.

On the other hand, the cited document 1 and the cited document 2 show a technique of installing an acceleration sensor in an elevator car.
Japanese Patent Laid-Open No. 11-248732 Japanese Patent Laid-Open No. 9-315716

  The present invention has been made in consideration of such points, and by detecting the acceleration of the car or the counterweight with an acceleration sensor, the position and speed of the car or the counterweight can be accurately calculated. An object of the present invention is to provide an elevator system that can safely control a car or a counterweight.

  The present invention relates to an elevator system having an elevator car, a hoisting machine for raising and lowering the car in a hoistway, and a counterweight connected to the car via a main rope. An acceleration sensor for detecting acceleration of the counterweight and a control device connected to the acceleration sensor, the control device integrating the acceleration of the car or the counterweight transmitted from the acceleration sensor twice. Thus, the elevator system calculates the position of the car or the counterweight.

  The present invention relates to an elevator system having an elevator car, a hoisting machine for raising and lowering the car in a hoistway, and a counterweight connected to the car via a main rope. A jerk sensor for detecting the jerk of the counterweight, and a control device connected to the jerk sensor, the control device adds the car or the counterweight transmitted from the jerk sensor. In the elevator system, the position of the car or the counterweight is calculated by integrating acceleration three times.

  The present invention further includes a hoisting machine braking device that is connected to the control device and decelerates the hoisting machine, and the control device moves the car based on the calculated position of the car or the counterweight. An elevator system characterized by being stopped.

  The present invention relates to an elevator system having an elevator car, a hoisting machine for raising and lowering the car in a hoistway, and a counterweight connected to the car via a main rope. An acceleration sensor for detecting the acceleration of the counterweight; a control device connected to the acceleration sensor; and a hoisting machine braking device connected to the control device and decelerating the hoisting machine, The speed of the car or the counterweight is calculated by integrating once the acceleration of the car or the counterweight transmitted from the acceleration sensor, and the speed of the car or the counterweight is calculated based on the speed of the car or the counterweight. The hoisting machine is decelerated by controlling the hoisting machine braking device. That is the elevator system.

  The present invention relates to an elevator system having an elevator car, a hoisting machine for raising and lowering the car in a hoistway, and a counterweight connected to the car via a main rope. A jerk sensor for detecting the jerk of the counterweight, a control device connected to the jerk sensor, and a hoisting machine braking device connected to the control device for decelerating the hoisting machine, The control device calculates the speed of the car or the counterweight by integrating twice the jerk of the car or the counterweight transmitted from the jerk sensor, and the car or the counterweight The hoisting machine is decelerated by controlling the hoisting machine braking device based on the speed of the hoisting machine. It is an elevator system characterized.

  The present invention relates to an elevator system having an elevator car, a hoisting machine for raising and lowering the car in a hoistway, and a counterweight connected to the car via a main rope. An acceleration sensor for detecting the acceleration of the counterweight; a control device connected to the acceleration sensor; and a hoisting machine braking device connected to the control device and decelerating the hoisting machine, By controlling the hoisting machine braking device based on the acceleration of the car or the counterweight from the acceleration sensor during emergency braking of the car or the counterweight, the deceleration of the hoisting machine is reduced. An elevator system characterized by being lowered.

  The present invention relates to an elevator system having an elevator car, a hoisting machine for raising and lowering the car in a hoistway, and a counterweight connected to the car via a main rope. A jerk sensor for detecting the jerk of the counterweight, a control device connected to the jerk sensor, and a hoisting machine braking device connected to the control device for decelerating the hoisting machine, The controller integrates the jerk of the car or the counterweight transmitted from the jerk sensor once during emergency braking of the car or the counterweight, thereby integrating the acceleration of the car or the counterweight. Based on the acceleration of the car or the counterweight By controlling the Kimaki hoist braking device, which is an elevator system characterized by decreasing the deceleration of the hoisting machine.

  The present invention relates to an elevator system having an elevator car, a hoisting machine for raising and lowering the car in a hoistway, and a counterweight connected to the car via a main rope. An acceleration sensor for detecting the acceleration of the counterweight, a control device connected to the acceleration sensor, and a hoisting machine braking device for decelerating the hoisting machine, wherein the main rope is wound by the main rope. And a motor connected to the control device and driving the sheave, the control device operating the hoisting machine braking device during emergency braking of the car or the counterweight. , Stopping the motor based on the acceleration of the car or the counterweight from the acceleration sensor, A elevator system characterized by stopping the manufacturing machine.

  The present invention relates to an elevator system having an elevator car, a hoisting machine for raising and lowering the car in a hoistway, and a counterweight connected to the car via a main rope. A jerk sensor that detects jerk of the counterweight, a control device connected to the jerk sensor, and a hoisting machine braking device that decelerates the hoisting machine, wherein the hoisting machine includes the main weight A sheave around which a rope is wound, and a motor that is connected to the control device and drives the sheave, and the control device controls the car or the counterweight that operates the hoisting machine braking device. During emergency braking, the jerk of the car or the counterweight transmitted from the jerk sensor is integrated once. Calculating the acceleration of the car or the counterweight by, stop the motor based on the acceleration of the said cab or said counterweight, a elevator system, characterized in that stops the hoist.

  The present invention relates to an elevator system having an elevator car, a hoisting machine for raising and lowering the car in a hoistway, and a counterweight connected to the car via a main rope. An acceleration sensor for detecting the acceleration of the counterweight, a control device connected to the acceleration sensor, a hoisting device braking device for decelerating the hoisting machine, and a decelerating device that is connected to the control device and decelerates the hoisting machine And a pre-braking device for controlling the car or the counterweight based on the acceleration of the car or the counterweight during emergency braking of the car or the counterweight for operating the hoisting machine braking device. The hoisting machine is further stopped by operating the preliminary braking device. Les is a beta system.

  The present invention relates to an elevator system having an elevator car, a hoisting machine for raising and lowering the car in a hoistway, and a counterweight connected to the car via a main rope. A jerk sensor for detecting the jerk of the counterweight, a control device connected to the jerk sensor, a hoist brake device for decelerating the hoist, and a hoisting device connected to the control device. A pre-brake device that decelerates the machine, and the control device transmits the car or the car transmitted from the jerk sensor during emergency braking of the car or the counterweight for operating the hoisting machine brake device. The acceleration of the car or the counterweight is calculated by integrating the counterweight jerk once. And, based on the acceleration of the said cab or said counterweight, by further operating the preliminary damping device is an elevator system characterized by stopping the hoist.

  In the present invention, the hoist includes a sheave around which the main rope is wound, and a motor that is connected to the control device and drives the sheave, and the control device includes the car or the Calculating the difference between the position of the car or the counterweight calculated by integrating the acceleration of the counterweight twice and the position of the car or the counterweight calculated based on the rotational speed of the motor Is an elevator system characterized by

  In the present invention, the hoist includes a sheave around which the main rope is wound, and a motor that is connected to the control device and drives the sheave, and the control device includes the car or the Calculate the difference between the position of the car or counterweight calculated by integrating the counterweight jerk three times and the position of the car or counterweight calculated based on the number of revolutions of the motor It is the elevator system characterized by this.

  The present invention is the elevator system, wherein the acceleration sensor is provided in the car.

  The present invention is the elevator system characterized in that the jerk sensor is provided in the car.

  The present invention is the elevator system, wherein the acceleration sensor is provided in the counterweight.

  The present invention is the elevator system, wherein the jerk sensor is provided in the counterweight.

  According to the present invention, the position of the car or the counterweight is calculated by integrating the acceleration (the jerk) of the car or the counterweight transmitted from the acceleration sensor (the jerk sensor) twice (three times). Therefore, even when the sheave of the hoisting machine is worn and the sheave diameter is reduced, the position of the car or the counterweight can be accurately calculated.

  According to the present invention, the control device stops the car based on the calculated position of the car or the counterweight. Thereby, when the car or the counterweight moves beyond the reference value from the predetermined position when the car is opened, the car or the counterweight can be safely stopped.

  Further, according to the present invention, the control device integrates the acceleration (jerk acceleration) of the car or counterweight transmitted from the acceleration sensor (jaw acceleration sensor) once (twice), thereby the car or counterweight. The hoisting machine is decelerated by controlling the hoisting machine braking device based on the speed of the car or the counterweight. Thereby, when the speed of the car or the counterweight exceeds the reference value, the car or the counterweight can be decelerated or stopped safely.

  Furthermore, according to the present invention, the control device brakes the hoisting machine based on the acceleration (the jerk) of the car or the counterweight from the acceleration sensor (the jerk sensor) during emergency braking of the car or the counterweight. By controlling the device, the deceleration of the hoist is reduced. Thereby, when the deceleration of the car or the counterweight exceeds the reference value, the car or the counterweight can be slowly decelerated, and the safety of the elevator can be improved.

  Still further, according to the present invention, the control device causes the acceleration of the car or the counterweight (the jerk) from the acceleration sensor (the jerk sensor) during emergency braking of the car or the counterweight that operates the hoisting machine braking device. ) To stop the hoisting machine. As a result, the car or the counterweight can be stopped reliably during emergency braking, and the safety of the elevator can be improved.

  Still further, according to the present invention, the control device causes the acceleration of the car or the counterweight (the jerk) from the acceleration sensor (the jerk sensor) during emergency braking of the car or the counterweight that operates the hoisting machine braking device. ) To further stop the hoisting machine by operating the preliminary braking device. Thus, the car or counterweight can be stopped reliably during emergency braking of the car or counterweight, and the safety of the elevator can be improved.

  Still further, according to the present invention, the control device can calculate the position of the car or counterweight calculated by integrating the acceleration of the car or the counterweight twice, and the car or the weight calculated based on the rotational speed of the motor. The difference from the counterweight position is calculated. Therefore, sheave groove wear and rope creep (phenomenon where the position of the car calculated based on the motor speed of the hoisting machine deviates from the actual car position), which is difficult to judge in normal maintenance, etc., occur. It can be easily determined whether or not.

First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 1 is a diagram showing the entire elevator system, and FIG. 2 is a front view showing the hoisting machine. 3 is a view in the direction of arrow A in FIG. 2, and FIG. 4 is a perspective view showing the car. Moreover, FIG. 5 is a figure which shows a counterweight, and FIG. 6 is a figure which shows the connection relationship of an elevator system.

First, the configuration of the elevator system will be described with reference to FIGS.
As shown in FIG. 1, an elevator system 10 includes a hoistway 11 provided in a building 15 having a landing 15a on each floor, and a car that is guided by a pair of guide rails 14a and 14b and moves up and down in the hoistway 11. 12. A counterweight 18 is connected to the car 12 via a main rope 25. This counterweight 18 moves up and down in the hoistway 11 in conjunction with the car 12. In addition, a pair of doors 12L and 12R that open and close in the left-right direction is provided on the front surface of the car 12, and a safety device 30a that engages with the guide rails 14a and 14b at the lower part of the car 12 to make the car 12 emergency stop. , 30b.

  A machine room 24 is installed at the top of the hoistway 11. In the machine room 24, a control device 26, which will be described later, is provided, and a deflecting sheave 23 around which a main rope 25 is bridged is provided.

  An elevator governor device 27 is provided in the machine room 24. The governor device 27 has a governor sheave 28, and a governor rope 29 is wound around the governor sheave 28. The governor rope 29 is also wound around a governor tensioner 34 provided below the guide rails 14a and 14b. The governor rope 29 is fixed to the back of the car 12.

  On the other hand, a hoisting machine 32 that raises and lowers the car 12 and the counterweight 18 in the hoistway 11 is installed in the machine room 24.

  As shown in FIG. 2, the hoisting machine 32 includes a sheave 20 around which the main rope 25 is wound, and a motor 21 that is connected to the sheave 20 and rotationally drives the sheave 20 about the shaft 20a. A motor pulse generator 22 that detects the number of rotations of the motor 21 and transmits it to the control device 26 is attached to the motor 21.

  As shown in FIG. 3, a disc-shaped brake drum 31 is fixed to the shaft 20 a of the sheave 20. Around the brake drum 31, there are provided two hoisting machine braking devices (brakes) 35a and 35b that contact the sheave 20 of the hoisting machine 32 and decelerate the hoisting machine 32.

Next, the acceleration sensor will be described with reference to FIGS.
In FIG. 4, the acceleration sensor 16 a is provided on the lower beam 13 provided on the lower surface of the car 12. The acceleration sensor 16 a has a function of detecting an acceleration when the car 12 moves in the vertical direction, and the detected acceleration can be transmitted to the control device 26. The acceleration sensor 16a directly detects the acceleration of the car 12. However, since the car 12 and the counterweight 18 are connected via the main rope 25 as described above, the acceleration sensor 16a is indirect. It is also possible to detect the acceleration of the counterweight 18 (the direction is opposite to the acceleration of the car 12). As such an acceleration sensor 16a, a known sensor can be used.

  On the other hand, in FIG. 5, the counterweight 18 has a plurality of weights 17 and a pair of weight retainers 19 a and 19 b that lock the weights 17 from above. The acceleration sensor 16b is provided above the uppermost weight 17 and between the weight retainers 19a and 19b. The acceleration sensor 16b has a function of detecting acceleration when the counterweight 18 moves in the vertical direction, and can transmit the detected acceleration to the control device 26. The acceleration sensor 16b directly detects the acceleration of the counterweight 18, but, like the acceleration sensor 16a described above, indirectly the acceleration of the car 12 (the direction opposite to the acceleration of the counterweight 18 is reversed). Can also be detected. As such an acceleration sensor 16b, a known sensor can be used in the same manner as the acceleration sensor 16a.

  By the way, as described above, the car 12 and the counterweight 18 are interlocked. Therefore, if either one of the acceleration sensor 16a on the car 12 side or the acceleration sensor 16b on the counterweight 18 side is provided. Both the acceleration of the car 12 and the acceleration of the counterweight 18 can be detected. However, in consideration of the case where the main rope 25 is cut, it is preferable that both the acceleration sensor 16a on the car 12 side and the acceleration sensor 16b on the counterweight 18 side are provided.

Next, the control device for the elevator system described above with reference to FIG. 6 will be further described.
In FIG. 6, acceleration sensors 16 a and 16 b and a motor pulse generator 22 are connected to the control device 26. Among these, the acceleration sensors 16a and 16b transmit the acceleration of the car 12 and the acceleration of the counterweight 18 to the control device 26, respectively. On the other hand, the motor pulse generator 22 transmits the rotational speed of the motor 21 to the control device 26.

  The control device 26 is connected to the hoisting machine braking devices 35 a, 35 b and the motor 21 via the rising acceleration preventing device 36 and the door opening travel preventing device 37. That is, the control signal from the control device 26 is transmitted to the hoisting machine braking devices 35a and 35b and the motor 21 via the rising acceleration preventing device 36, or the hoisting machine braking device 35a and 35b and the motor 21.

  In addition, the control device 26 calculates the speeds of the car 12 and the counterweight 18 by integrating the accelerations of the car 12 and the counterweight 18 transmitted from the acceleration sensors 16a and 16b once. It has a function of calculating the positions of the car 12 and the counterweight 18 by integrating the times. The control device 26 also has a function of calculating the positions of the car 12 and the counterweight 18 based on the rotational speed signal of the motor 21 transmitted from the motor pulse generator 22.

Next, the operation of the present embodiment having such a configuration will be described.
First, the control device 26 integrates the acceleration of the car 12 and the counterweight 18 transmitted from the acceleration sensors 16a and 16b twice during the normal operation of the elevator, thereby determining the positions of the car 12 and the counterweight 18. Always calculate.

  Next, the car 12 stops at the landing 15a on each floor, the doors 12L and 12R of the car 12 are opened, and the hoisting machine braking devices 35a and 35b of the hoisting machine 32 are operated.

  At this time, it is assumed that the position of the car 12 is beyond the reference value from the floor level of the landing 15a. In this case, the control device 26 stops the car 12 and the counterweight 18 based on the calculated position of the car 12. That is, the control device 26 transmits a control signal to the door-opening travel prevention device 37, and then the door-opening travel prevention device 37 activates the safety devices 30a and 30b to cause the car 12 and the counterweight 18 to emergency stop. As a result, it is possible to reliably prevent an accident in which a passenger getting on and off the car 12 is caught, and safety can be improved. The control device 26 can also calculate the position of the counterweight 18 and make the car 12 and the counterweight 18 emergency stop based on the position of the counterweight 18.

  As described above, according to the present embodiment, the control device 26 stops the car 12 and the counterweight 18 based on the calculated positions of the car 12 and the counterweight 18. Thereby, when the car 12 and the counterweight 18 move beyond the reference value from the predetermined position when the car 12 is opened, the car 12 and the counterweight 18 can be safely stopped.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS.
1 to 6 show a second embodiment of an elevator system according to the present invention. In the second embodiment, only the control contents by the control device are different, and the others are the same as in the first embodiment. In the second embodiment, detailed description of the same parts as those of the first embodiment is omitted.

  1 to 6, the control device 26 integrates the acceleration of the car 12 and the counterweight 18 transmitted from the acceleration sensors 16a and 16b once during the normal operation of the elevator, so that the car 12 and the counterweight are integrated. The speed of 18 is always calculated.

  At this time, it is assumed that the speed of the car 12 exceeds the reference value. In this case, the control device 26 controls the hoisting machine braking devices 35a and 35b based on the calculated speed of the car 12, and decelerates or stops the hoisting machine 32. That is, the control device 26 transmits a control signal to the rising acceleration preventing device 36, and then the rising acceleration preventing device 36 operates the hoisting machine braking devices 35a and 35b to decelerate or stop the hoisting machine 32. Accordingly, the car 12 and the counterweight 18 are also decelerated or stopped.

  The control device 26 may calculate the position of the counterweight 18 and decelerate or stop the hoisting machine 32 based on the speed of the counterweight 18. Further, in order to reliably prevent the car 12 from colliding with the machine room 24, the rising acceleration preventing device 36 operates the hoisting machine braking devices 35a and 35b only when the car 12 is raised, and the car 12 When the vehicle descends, the hoisting machine braking devices 35a and 35b may not be operated.

  As described above, according to the present embodiment, the control device 26 integrates the accelerations of the car 12 and the counterweight 18 transmitted from the acceleration sensors 16a and 16b once, so that the speeds of the car 12 and the counterweight 18 are integrated. Is calculated and the hoisting machine braking devices 35a and 35b are controlled based on the speeds of the car 12 and the counterweight 18 to decelerate or stop the hoisting machine 32. Thereby, when the speed of the car 12 and the counterweight 18 exceeds the reference value, the car 12 and the counterweight 18 can be decelerated or stopped safely.

  Further, according to the present embodiment, since the actual speed of the car 12 can be accurately detected, a governor pulse generator for detecting the rotational speed of the governor device 27 becomes unnecessary, and the cost of the elevator system is reduced. be able to.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIGS.
1 to 6 show a third embodiment of an elevator system according to the present invention. In the third embodiment, only the control content by the control device is different, and the others are the same as in the first embodiment. In the third embodiment, detailed description of the same parts as those of the first embodiment is omitted.

  1 to 6, the control device 26 constantly monitors the acceleration of the car 12 and the counterweight 18 transmitted from the acceleration sensors 16a and 16b during normal operation of the elevator.

  Next, it is assumed that the car 12 and the counterweight 18 are emergency braked. During the emergency braking, the two hoisting machine braking devices 35a and 35b both come into contact with the sheave 20 of the hoisting machine 32 and decelerate the hoisting machine 32 (see FIG. 3).

  During this time, the control device 26, when the deceleration of the car 12 and the counterweight 18 exceeds the reference value based on the acceleration of the car 12 and the counterweight 18 from the acceleration sensors 16a and 16b (that is, a reference with a constant acceleration). The hoisting machine braking devices 35a and 35b are controlled. As a result, the deceleration of the hoisting machine 32 is reduced, and the deceleration of the car 12 and the counterweight 18 is reduced.

  That is, when the deceleration of the car 12 and the counterweight 18 exceeds the reference value, the control device 26 transmits a control signal to the hoisting machine braking devices 35a and 35b. Thereby, one of the two hoisting machine braking devices 35a and 35b is opened, and the deceleration of the hoisting machine 32 is lowered. In this way, the car 12 can be stopped without giving a shock and discomfort to the passengers in the car 12.

  As described above, according to the present embodiment, the control device 26 controls the hoisting mechanism control based on the acceleration of the car 12 and the counterweight 18 from the acceleration sensors 16a and 16b during emergency braking of the car 12 and the counterweight 18. The deceleration of the hoisting machine 32 is reduced by controlling the moving devices 35a and 35b. Thereby, when the deceleration of the car 12 and the counterweight 18 exceeds the reference value, the car 12 and the counterweight 18 can be slowly decelerated, and the safety of the elevator can be improved.

Fourth Embodiment Next, a fourth embodiment of the present invention will be described with reference to FIGS.
1 to 6 show a fourth embodiment of an elevator system according to the present invention. In the fourth embodiment, only the control contents by the control device are different, and the others are the same as in the first embodiment. In the fourth embodiment, detailed description of the same parts as those of the first embodiment is omitted.

  1 to 6, during normal operation of the elevator, the control device 26 constantly monitors the acceleration of the car 12 and the counterweight 18 transmitted from the acceleration sensors 16a and 16b.

  Next, it is assumed that the car 12 and the counterweight 18 are emergency braked. During this emergency braking, the two sets of hoisting machine braking devices 35a and 35b both come into contact with the sheave 20 of the hoisting machine 32 and decelerate the hoisting machine 32 (see FIG. 3).

  During this time, the control device 26 determines that the deceleration of the car 12 and the counterweight 18 is below the reference value based on the acceleration of the car 12 and the counterweight 18 from the acceleration sensors 16a and 16b (that is, a reference with a constant acceleration). If the value exceeds the value (<0)), it is determined that the effectiveness of the hoisting machine braking devices 35a and 35b is insufficient, and the motor 21 is stopped. Thereby, the hoisting machine 32 is stopped and the car 12 and the counterweight 18 are stopped.

  That is, when the deceleration of the car 12 and the counterweight 18 falls below the reference value, the control device 26 transmits a control signal to the motor 21 to operate the dynamic brake of the motor 21. That is, the circuit in the motor 21 is short-circuited to stop the motor 21 and thereby the hoisting machine 32 is stopped.

  As described above, according to the present embodiment, the control device 26 detects the car 12 from the acceleration sensors 16a and 16b and the car 12 that operates the hoisting machine braking devices 35a and 35b and the emergency weight of the counterweight 18 and The motor 21 is stopped based on the acceleration of the counterweight 18 and the hoisting machine 32 is stopped. Thereby, the car 12 and the counterweight 18 can be surely stopped during emergency braking, and the safety of the elevator can be improved.

Fifth Embodiment Next, a fifth embodiment of the present invention will be described with reference to FIGS.
1 to 7 show a fifth embodiment of an elevator system according to the present invention. In the fifth embodiment, only the control contents by the control device are different, and the others are the same as in the first embodiment. In the fifth embodiment, detailed description of the same parts as those of the first embodiment is omitted.

  7 is a view in the direction of arrow B in FIG. As shown in FIG. 7, in addition to the two hoisting machine braking devices 35a and 35b, one preliminary braking device 38 is provided around the brake drum 31. The preliminary braking device 38 is connected to the control device 26.

  During normal operation of the elevator, the control device 26 constantly monitors the acceleration of the car 12 and the counterweight 18 transmitted from the acceleration sensors 16a and 16b.

  Next, it is assumed that the car 12 and the counterweight 18 are emergency braked. During this emergency braking, the two sets of hoisting machine braking devices 35a and 35b both come into contact with the sheave 20 of the hoisting machine 32 to decelerate the hoisting machine 32.

  At this time, the control device 26, when the deceleration of the car 12 and the counterweight 18 falls below the reference value based on the acceleration of the car 12 and the counterweight 18 from the acceleration sensors 16a and 16b (that is, the acceleration is constant). It is determined that the effectiveness of the hoisting machine braking devices 35a and 35b is insufficient, and the preliminary braking device 38 is further operated. As a result, the hoisting machine 32 is stopped, and the car 12 and the counterweight 18 are reliably stopped.

  As described above, according to the present embodiment, the control device 26 further operates the preliminary braking device 38 during emergency braking of the car 12 and the counterweight 18 for operating the hoisting machine braking devices 35a and 35b. The upper machine 32 is stopped. Thereby, the car 12 and the counterweight 18 can be surely stopped during emergency braking, and the safety of the elevator can be improved.

Sixth Embodiment Next, a sixth embodiment of the present invention will be described with reference to FIGS. 1 to 6 and FIG.
1 to 6 and 8 show a sixth embodiment of an elevator system according to the present invention. In the sixth embodiment, only the control contents by the control device are different, and the others are the same as in the first embodiment. In the sixth embodiment, detailed description of the same parts as those of the first embodiment is omitted.

  1 to 6, the control device 26 calculates the positions of the car 12 and the counterweight 18 by integrating twice the accelerations of the car 12 and the counterweight 18 transmitted from the acceleration sensors 16a and 16b. . Further, the control device 26 calculates the positions of the car 12 and the counterweight 18 based on the rotation speed signal of the motor 21 transmitted from the motor pulse generator 22.

  Thereafter, the control device 26 calculates the position of the car 12 and the counterweight 18 calculated by integrating the acceleration twice in this way, and the car 12 and the counterweight calculated based on the rotation speed signal of the motor 21. The difference from the 18 position is calculated.

FIG. 8 is a vertical sectional view of the sheave 20. As shown in FIG. 8, grooves 20 b ₁ , b ₂ ,... That hold the main ropes 25 are formed along the longitudinal direction of the sheave 20.

As shown in FIG. 8, the main rope 25 is groove 20b _1, b ₂ of the sheave 20, by long-term sliding in., The grooves 20b _1, b ₂ of the sheave 20, ... are worn (Virtual line).

In contrast, the control device 26 determines the position of the car 12 calculated by integrating the accelerations of the car 12 and the counterweight 18 twice, and the position of the car 12 calculated based on the rotation speed of the motor 21. Therefore, it is possible to determine whether or not the position of the car 12 or the counterweight 18 has shifted. Therefore, wear and rope creep of the sheaves 20 b ₁ , b ₂ ,. It is possible to easily determine whether or not a phenomenon in which the position of the car 12 is shifted) or the like has occurred.

Modification In the above-described embodiments, a jerk sensor may be used instead of the acceleration sensors 16a and 16b. In this case, the control device 26 calculates the acceleration of the car 12 and the counterweight 18 by integrating the jerk transmitted from the jerk sensor once, and the car 12 and the counter weight 18 by integrating the jerk twice. The speed of the counterweight 18 is calculated, and the positions of the car 12 and the counterweight 18 are calculated by integrating the jerk three times. Other configurations are the same as those of the above-described embodiments.

FIG. 1 is a diagram showing an entire elevator system. FIG. 2 is a front view showing the hoisting machine. 3 is a view in the direction of arrow A in FIG. FIG. 4 is a perspective view showing a car. FIG. 5 is a view showing a counterweight. FIG. 6 is a diagram showing a connection relationship of the elevator system. 7 is a view in the direction of arrow B in FIG. FIG. 8 is a vertical sectional view of the sheave. FIG. 9 is a diagram showing a conventional elevator system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Elevator system 11 Hoistway 12 Car 14a, 14b Guide rail 15 Building 16a, 16b Accelerometer 18 Counterweight 20 Sheave 21 Motor 22 Motor pulse generator 24 Machine room 25 Main rope 26 Control device 27 Governor device 29 Governor rope 30a, 30b Safety Device 31 Brake drum 32 Hoisting machine 35a, 35b Hoisting machine braking device 36 Lift acceleration prevention device 37 Door-opening travel prevention device 38 Preliminary braking device

Claims (9)

In an elevator system having an elevator car, a hoist that raises and lowers the car in a hoistway, and a counterweight connected to the car via a main rope,
An acceleration sensor for detecting acceleration of the car or the counterweight;
A control device connected to the acceleration sensor,
The said control apparatus calculates the position of the said car or the said counterweight by integrating twice the acceleration of the said car or the said counterweight transmitted from the said acceleration sensor, The elevator system characterized by the above-mentioned. A hoisting machine braking device connected to the control device and decelerating the hoisting machine;
The elevator system according to claim 1, wherein the control device stops the car based on the calculated position of the car or the counterweight. In an elevator system having an elevator car, a hoist that raises and lowers the car in a hoistway, and a counterweight connected to the car via a main rope,
An acceleration sensor for detecting acceleration of the car or the counterweight;
A control device connected to the acceleration sensor;
A hoisting machine braking device connected to the control device and decelerating the hoisting machine;
The control device calculates the speed of the car or the counterweight by integrating once the acceleration of the car or the counterweight transmitted from the acceleration sensor, and determines the speed of the car or the counterweight. An elevator system that decelerates the hoisting machine by controlling the hoisting machine braking device based on a speed. In an elevator system having an elevator car, a hoist that raises and lowers the car in a hoistway, and a counterweight connected to the car via a main rope,
An acceleration sensor for detecting acceleration of the car or the counterweight;
A control device connected to the acceleration sensor;
A hoisting machine braking device connected to the control device and decelerating the hoisting machine;
The controller controls the hoisting machine braking device based on acceleration of the car or the counterweight from the acceleration sensor during emergency braking of the car or the counterweight. An elevator system characterized by lowering the deceleration of the vehicle. In an elevator system having an elevator car, a hoist that raises and lowers the car in a hoistway, and a counterweight connected to the car via a main rope,
An acceleration sensor for detecting acceleration of the car or the counterweight;
A control device connected to the acceleration sensor;
A hoisting machine braking device for decelerating the hoisting machine,
The hoist includes a sheave around which the main rope is wound, and a motor that is connected to the control device and drives the sheave,
The controller stops the motor based on the acceleration of the car or the counterweight from the acceleration sensor during emergency braking of the car or the counterweight that operates the hoisting machine braking device, An elevator system characterized by stopping the hoisting machine. In an elevator system having an elevator car, a hoist that raises and lowers the car in a hoistway, and a counterweight connected to the car via a main rope,
An acceleration sensor for detecting acceleration of the car or the counterweight;
A control device connected to the acceleration sensor;
A hoisting machine braking device for decelerating the hoisting machine;
A preliminary braking device connected to the control device and decelerating the hoisting machine;
The control device further includes the preliminary braking device based on the acceleration of the car or the counterweight from the acceleration sensor during emergency braking of the car or the counterweight that operates the hoisting machine braking device. An elevator system, wherein the hoisting machine is stopped by operating. The hoist includes a sheave around which the main rope is wound, and a motor that is connected to the control device and drives the sheave,
The control device is configured to calculate the position of the car or the counterweight calculated by integrating twice the acceleration of the car or the counterweight, and the car or the counter calculated based on the rotational speed of the motor. The elevator system according to claim 1, wherein a difference from the weight position is calculated.   The elevator system according to any one of claims 1 to 7, wherein the acceleration sensor is provided in the car.   The elevator system according to any one of claims 1 to 7, wherein the acceleration sensor is provided in the counterweight.

Images