JP2008222394A - Elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator device for stopping an elevator by continuously operating or operating up to the nearest floor, by further accurately detecting normality and abnormality of a hoisting machine. <P>SOLUTION: This elevator device is constituted so that the elevator is stopped by operating up to the nearest floor, when a state requirement determining means determines as abnormal, by input of at least any one state requirement of braking force of an electromagnetic brake 6 or operation force of a braking force applying means 9 or the temperature of a braking pad 12 or an operation position between an iron piece 15 of a braking force releasing means 10 and an electromagnet 16 or the temperature of the electromagnet 16 or an electric current of the electromagnet 16, and at least any one state requirement of an operation position of the braking force applying means 9 or operation force of the braking force releasing means 10 or a change width of the operation position between the braking force applying means 9 and the braking force releasing means 10 or operational vibration of the electromagnetic brake 6 or sound pressure or the temperature of an electric motor 5 or the temperature of an encoder 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an elevator apparatus that performs operation control according to the state requirements of a hoisting machine.

  A conventional rope type elevator apparatus is configured in a lip shape in which a car ride and a counterweight are engaged on both sides of a main rope wound around a drive sheave of a hoisting machine. The hoisting machine is composed of the driving sheave, an electric motor that drives the driving sheave, and an electromagnetic brake for stopping and holding the passenger car and the counterweight, and the electromagnetic brake is configured to rotate the hoisting machine. The braking force adding means for adding a braking force to the part and the braking force releasing means for releasing the braking force of the braking force adding means. In addition, an encoder for detecting rotation of the shafts of the electric motor and the drive sheave is provided.

In the elevator apparatus configured as described above, the motor and the electromagnetic brake of the hoisting machine are controlled by the control device, and the drive sheave is driven and braked. As a result, the wound main rope is driven and braked, and the car and the counterweight are lifted and stopped in the hoistway. The encoder signal controls the rotation of the motor and the position of the car. And the method of operating an elevator apparatus from state requirements, such as the electromagnet coil current of an electromagnetic brake, electromagnet temperature, sliding material temperature, and armature displacement, from the point of safety is proposed. (For example, see Patent Document 1)
In addition, it is disclosed that an electric motor torque is generated while the car is stopped, and an abnormality in the brake torque is detected by detecting the rotation of the electric motor. (For example, see Patent Document 2)
Further, it is disclosed that the rotational displacement of the disc brake main body holding portion is detected to determine the deterioration of the elastic body that supports the disc brake main body. (For example, see Patent Document 3)
JP 2002-316777 A Japanese Patent Laid-Open No. 01-288590 Japanese Patent Application Laid-Open No. 08-310764

  In general, since an elevator is a vertical traffic machine used by a person, safety must be taken into consideration. The hoisting machine must be operated reliably as a driving device with the car and the counterweight. In particular, an electromagnetic brake as a safety device is required to operate reliably and perform a braking operation. Therefore, in order to continue operating the elevator safely, it is necessary to detect the abnormality / failure of the hoisting machine including the electromagnetic brake early, and it is necessary to operate the elevator safely to the nearest floor after detecting the abnormality / failure. It is. For this purpose, Patent Documents 1 to 3 and the like are disclosed.

  However, in the elevator apparatus proposed in the above-mentioned Patent Document 1, there is a problem that a part for determining whether the hoisting machine is normal or abnormal, that is, a state requirement is not sufficiently set, and an elevator that can be operated more safely cannot be obtained. was there.

  The elevator brake torque checking device proposed in Patent Document 2 checks the brake torque while the car is stopped, and generates an abnormal signal if the brake torque is abnormal. That is, in the proposed content, for example, the set brake torque is set to 200%, and it is determined that the set brake torque is normal when the value is greater than or equal to this value, and is abnormal when the value is less than this value. However, when the brake torque is smaller than the set brake torque, there is a problem that it is unclear how much the brake torque is actually.

  Further, the elevator brake abnormality diagnosis device proposed in Patent Document 3 detects the rotational displacement of the disc brake body holding portion and determines the deterioration of the elastic body that supports the disc brake body, This does not consider how to operate the elevator.

  The purpose of the present invention is to solve the above-mentioned problems, more accurately detecting the normality and abnormality of the hoisting machine, and thereby operating the elevator continuously or to the nearest floor to stop. The object is to provide an elevator device.

  In order to achieve the above object, in claim 1 of the present invention, a drive sheave around which a main rope that engages a car on one side and a counterweight on the other side is wound, and a control device that drives this drive sheave A hoisting machine composed of an electric motor that is controlled by operation, an encoder that detects rotation information of the driving sheave or the electric motor and position information of a car, and an electromagnetic brake that brakes the driving sheave and the electric motor, The electromagnetic brake is a braking force applying means that applies a braking force by pressing a braking pad against the rotating member of the hoisting machine, and a braking force that releases the braking force by an electromagnet that electromagnetically attracts an iron piece against the braking force adding means. In the elevator apparatus comprising the condition requirement determining means for inputting a condition requirement of the hoisting machine, and outputting an operation command to the control device according to the condition requirement, The braking force of the electromagnetic brake, or the operating force of the braking force adding means or the temperature of the braking pad, the operating position between the iron piece and the electromagnet of the braking force releasing means, the temperature of the electromagnet, or the current of the electromagnet One state requirement, an operating position of the braking force adding means, an operating force of the braking force releasing means, a change width of the operating position of the braking force adding means and the braking force releasing means, or the electromagnetic brake When the state requirement determination means determines that an abnormality has occurred due to the input of at least one state requirement of operating vibration or sound pressure, or the temperature of the motor, or the temperature of the encoder, the elevator is driven to the nearest floor and stopped. It was made to do.

  With this configuration, it is possible to more accurately detect the normality and abnormality of the hoisting machine including the electromagnetic brake, thereby obtaining an elevator device that continuously operates or operates the elevator up to the nearest floor and stops it.

  Further, in claim 2, the braking force of the electromagnetic brake according to claim 1 is such that the electric motor is energized by the electric motor so that the electric car is in the upward driving direction of the car when the car is not loaded and the braking force is applied. A motor torque is generated, and a motor torque obtained from a known motor current vs. motor torque table is obtained under the condition that the rotating member of the motor is not rotated by the encoder.

  With this configuration, the actual braking torque can be obtained, and the normality and abnormality of the hoisting machine including the electromagnetic brake can be detected more accurately as in the case of claim 1 so that the elevator can be operated continuously or to the nearest floor. Then, an elevator device for stopping is obtained.

  According to a third aspect of the present invention, in the first aspect, the braking force adding means includes the braking pad that generates a braking force by pressing against a brake drum as a braked body with a rotating member of the motor. The brake pad is configured to include a brake spring that presses against the brake drum and applies a braking force, and a brake arm that serves as a connecting member that connects the brake piece and the brake spring. The force of the braking spring is detected by a pressure sensor that detects the force in the mechanism that connects the braking pad and the braking spring, and the operating position of the braking force adding means is in the mechanism that connects the braking pad and the braking spring. It is a position sensor that detects the position of.

  With this configuration, an elevator apparatus similar to that of the first aspect can be obtained.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the braking force release means includes the iron piece coupled to the brake pad, an electromagnet that electromagnetically attracts the iron piece, and the brake pad and the iron piece or the electromagnet. A connecting member, and one of the iron piece and the electromagnet is movable and the other is fixed and electromagnetically attracted against the urging force of the braking spring, and the braking pad is released by releasing the pressing of the braking pad, The electromagnetic attraction force of the electromagnet as the operating force of the braking force release means is detected by a pressure sensor that detects the force in the mechanism that connects the braking pad and the iron piece or the movable side of the electromagnet, and the braking force release means The operating position is detected by a position sensor that detects a position in a mechanism that connects the brake pad and the iron piece or the movable side of the electromagnet.

  With this configuration, an elevator apparatus similar to that of the first aspect can be obtained.

  Further, in claim 5, in claim 1, the braking force releasing means connects the iron piece connected to the brake pad, an electromagnet that electromagnetically attracts the iron piece, and connects the brake pad and the iron piece or the electromagnet. A connecting member, and one of the iron piece and the electromagnet is movable and the other is fixed and electromagnetically attracted against the urging force of the braking spring, and the braking pad is released by releasing the pressing of the braking pad, The electromagnetic attraction force of the electromagnet as the operating force of the braking force release means is detected by a pressure sensor that detects the force in the mechanism that connects the braking pad and the iron piece or the movable side of the electromagnet, and the braking force release means The operating position is detected by a position sensor that detects a position in a mechanism that connects the brake pad and the iron piece or the movable side of the electromagnet.

  With this configuration, an elevator apparatus can be obtained as in the first aspect.

  According to a sixth aspect of the present invention, in the first aspect, the temperature of the electric motor or the temperature of the encoder is detected by a temperature sensor installed in the electric motor or the encoder.

  With this configuration, an elevator apparatus similar to that of the first aspect can be obtained.

  According to a seventh aspect of the present invention, in the third or fourth aspect of the present invention, the position sensor includes a sensor that can continuously detect the position, or an ON-OFF response switch.

  With this configuration, an elevator apparatus can be obtained as in the first aspect.

  Further, in claim 8, the operation of the hoisting machine state requirement judging means in claim 1 is performed by a forced operation command at an elevator installation site or a remote forced operation command from a management center, and The management center is notified of the determination result of the machine state determination means.

  With this configuration, an elevator apparatus can be obtained similarly to the first aspect, and the operation state of the elevator can be managed by the management center.

  Further, according to a ninth aspect of the present invention, in the first aspect of the present invention, each floor has display means for displaying that the elevator is stopped during the operation of the state requirement determining means of the hoisting machine.

  With this configuration, the elevator apparatus can be obtained as in the first aspect, and the operation state of the elevator can be displayed on each floor.

  ADVANTAGE OF THE INVENTION According to this invention, the normality and abnormality of a winding machine are detected more correctly, and, thereby, the elevator apparatus which operates and stops an elevator to a continuous operation or the nearest floor is obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is a block diagram showing an elevator apparatus according to an embodiment of the present invention, FIG. 2 is a front view of a hoisting machine as an example of FIG. 1, FIG. 3 is a plan view of FIG. 2, and FIG. FIG. 5 is a sectional view of the brake spring portion of FIG. 2, FIG. 6 is a configuration diagram showing the brake pad portion of FIG. 2, and FIGS. ) Is a diagram showing an example of a current excitation pattern of the electromagnet electromagnetic coil of FIG. 2, FIG. 8 is an overall flowchart showing the operation of the elevator by determining the state requirements of the hoisting machine of FIG. 1, and FIG. 9 is the braking force or braking of FIG. FIG. 10 is a flowchart showing confirmation of the operating force, position, and temperature of each part in the braking applied state of FIG. 7, and FIG. 11 is an operating force, position of each part in the braking released state of FIG. FIG. 12 is a flow chart showing the confirmation of temperature. FIG. 12 shows the difference in detection results between the braking applied state of FIG. 10 and the braking released state of FIG. FIG. 13 is a flowchart showing confirmation of the coil current, vibration, and sound pressure from the braking force applied state to the releasing operation in FIG. 7, and FIGS. 14 to 16 are diagrams when the braking force is applied and when the braking force is released. It is a figure which shows the judgment range of the detection result of the detection means of a state requirement at the time.

  In FIG. 1, a car 3 and a counterweight 4 are engaged with both sides of a main rope 2 wound around the drive sheave 1, respectively, and the car 3 and the counterweight 4 are suspended in a shape of a hook. The drive sheave 1 is driven by an electric motor 5, and the drive sheave 1, the electric motor 5, the car 3 and the counterweight 4 are stopped and held by an electromagnetic brake 6. Reference numeral 7 denotes an encoder which detects rotation information of the electric motor 5 and drive sheave 1 and position information of the car 3. The hoisting machine 8 includes the drive sheave 1, the electric motor 5, the electromagnetic brake 6, and the encoder 7.

  The electromagnetic brake 6 includes a braking force adding means 9 for applying a braking force to the rotating portion of the hoisting machine 8 and a braking force releasing means 10 for releasing the braking force by releasing the braking force adding means 9. Is done. The braking force adding means 9 includes a braking pad 12 that generates a braking force when pressed against a brake drum 11 as a braked body provided on a rotating body of the electric motor 5, and the braking pad 12 serves as the brake. A braking spring 13 for pressing the drum 11 and applying a braking force, and a braking arm 14 as a connecting member for connecting the braking pad 12 and the braking spring 13, and the braking force release means 10, An iron piece 15 shown in FIG. 3 connected to the brake pad 12, an electromagnet 16 that electromagnetically attracts the iron piece 15, and a connecting member 16 a that connects the brake pad 12 and the iron piece 15 or the electromagnet 16. In this case, the connecting member 16a is composed of the L-shaped arm 29 shown in FIG. 4 and the braking arm 14 of the braking force adding means 9. Further, the brake mechanism of the electromagnetic brake 6 has two sets.

  Reference numeral 17 denotes a control device, which feeds back the output of the encoder 7 and the output of the load detector 3a of the car 3, and further inputs the result of the state requirement determination means 18 to control the motor 5. is doing. This state requirement judging means 18 is the state requirement 19 of the hoisting machine 8, that is, the braking force of the electromagnetic brake 6, the operating force of the braking force adding means or the temperature of the braking pad, or the braking force releasing means. At least one state requirement of the operating position between the iron piece and the electromagnet, the temperature of the electromagnet, or the current of the electromagnet, the operating position of the braking force adding means, the operating force of the braking force releasing means, or the braking force adding means And a state of change based on at least one state requirement of a change width of an operation position between the brake force release means and an operation vibration or sound pressure of the electromagnetic brake, a temperature of the electric motor, or a temperature of the encoder, This determination result is input to the control device. If normal, normal operation is performed, and if abnormal, operation is stopped up to the nearest floor. When confirming the braking force of the electromagnetic brake 6, an operation command for making a braking force confirmation operation is issued to the control device 17. The confirmation work of the state requirement 19 of the hoisting machine 8 is automatically performed before starting the elevator, when the passenger stops, or at midnight. Further, this confirmation work is performed by a forced operation command at the elevator installation site 20 or a remote operation command from the management center 21. In addition, when confirming the braking force, the nearest floor operation is displayed on each floor hall display 22, and at the same time, the management center 21 is notified.

  An example of the hoisting machine 8 is shown in FIGS. That is, the drive sheave 1, the brake drum 11, and the encoder 7 are provided on the output shaft 23 of the electric motor 5, and the electromagnetic brake 6 is provided so as to brake the brake drum 11. That is, the hoisting machine 8 includes the electric motor 5, the drive sheave 1, the electromagnetic brake 6, and the encoder 7, which are arranged in series.

  Reference numeral 24 denotes a first base integrally formed with the bracket 5a of the electric motor 5, and reference numeral 25 denotes a second base provided between the first base 24 and the bracket 5a. The brake pads 12 are in contact with the outer peripheral braking surface 11a of the brake drum 11, respectively. The braking arm 14 includes the braking pad 12 and one end portion 14a is rotatably supported by the bracket 5a. The brake spring 13 is disposed on a spring support member 26 fixed to the second base 25, and a spring rod 27 disposed on the other end portion 14 b of the brake arm 14 connects the spring support member 26 and the brake spring 13. The brake pad 12 passes through and is fixed by a spring presser 13a, and the brake pad 12 applies a pressing force to the brake surface 11a.

  The braking force adding means 9 includes a braking arm 14 that includes a braking pad 12 that contacts the brake drum 11 and is rotatably supported, and the braking pad 12 contacts and presses the brake drum 11 via the braking arm 14. And two sets of brake springs 13 arranged in this manner.

  In the braking force release means 10, the electromagnet 16 is provided on the first base 24, and the output of the electromagnet 16 drives the intermediate portion 14 c of the braking arm 14 so as to release the pressing force of the braking pad 12. It is supposed to be. That is, the electromagnetic brake 6 includes the brake drum 11, a braking force adding means 9 that applies a braking force by pressing the brake drum 11, and a braking force release means 10 that releases the braking force against the pressing. The braking force adding means 9 and the braking force releasing means 10 are each provided in two sets.

  The encoder 7 is connected to the output shaft 23 of the electric motor 5 and is provided on the second base 25 via a leaf spring 28 on the counter-motor 5 side of the brake drum 11.

  FIG. 4 shows the relationship between the output of the electromagnet 16 constituting the braking force release means 10 and the braking arm 14. In this figure, reference numeral 29 denotes a lever-type L-shaped arm that is rotatably supported by the first base 24. The other arm 30b of the output rod 30 serving as the movable output of the electromagnet 16 is engaged with the long arm end 29a of the L-shaped arm 29, and the short arm end 29b is engaged with the intermediate portion 14c of the brake arm 14. Match. In this embodiment, the engagement member 31 provided on the braking arm 14 is engaged via the L-shaped arm 29, but the other end 30 b of the output rod 30 is directly engaged with the braking arm 14. Anyway. The connecting member 14 a is composed of the braking arm and the L-shaped arm 29.

  The braking force releasing means 10 is composed of an electromagnet 16 having an electromagnetic coil 33 built in a yoke 32 and an iron piece 15 provided to face the electromagnetic attraction surface 34 of the electromagnet 16. One end of an output rod 30 is provided on the iron piece 15. The other end 30 b of the output rod 30 protrudes toward the antiferrous piece 15 side of the electromagnet 16. In this embodiment, the electromagnet 16 is fixed to the first base 24 as a fixed body, and the iron piece 15 and the output rod 30 are movable as movable bodies. 15 may be fixed to the first base 24, and the output rod 30 may be attached to the electromagnet 16 to form a movable body.

  The operation of the hoisting machine 8 is as follows. During braking, the braking pad 12 presses the braking surface 11a of the brake drum 11 via the braking arm 14 with the braking spring 13, and the braking state is set. That is, since the electric motor 5 and the drive sheave 1 do not rotate, the hoisting machine 8 is stopped. When releasing the braking force, the electromagnetic coil 33 is energized to generate a magnetic flux, and when the iron piece 15 is electromagnetically attracted to the electromagnetic attracting surface 34, the output rod 30 resists the spring force of the braking spring 13 via the L-shaped arm 29. Then, the braking arm 14 is driven, the braking pad 12 is separated from the braking surface, and braking is released. That is, since the electric motor 5 is in a rotatable state, the electric motor 5 is energized to drive the hoisting machine 8, the main rope 2 wound around the driving sheave 1 is driven, and the elevator car 3 and the counterweight 4 are moved up and down. .

  Next, based on FIG. 2 thru | or FIG. 7, the detection means of the state requirement 19 of the winding machine 8 is demonstrated.

  A position sensor that continuously detects the position of a predetermined portion of the braking arm 14 is provided as the operating position detecting means of the braking force adding means 9 and the braking force releasing means 10. In this case, the position sensor 35 is provided at the mounting position of the brake pad 12, and the position sensor 36 is provided at a position where the movement of the electromagnet 16 is transmitted. The position of the movable part of the electromagnet 16 is detected by providing a position sensor 37 between the electromagnet 16 and the iron piece 15. The position sensor 38 for detecting the position of the brake spring 13 is provided so as to detect the position of the spring presser 13a for tightening the spring.

  The force detecting means of the braking spring 13 as the operating force of the braking force adding means 9 is detected by providing a pressure sensor 40 between the spring rod 27 and the braking arm 14, and the pressing force to the brake drum 11 is A sheet-like pressure sensor 42 is provided between the brake pad 41 that holds the brake pad 12 and the brake pad 12 for detection.

  The means for detecting the electromagnetic attractive force of the electromagnet 16 as the operating force of the braking force release means 10 is detected by providing a pressure sensor 43 on the output rod 30.

  The temperature of the electric motor as temperature detecting means is provided with a temperature sensor 44 on the exterior of the motor 5, and the electromagnet temperature is provided with a temperature sensor 45 on the exterior of the electromagnet 16. The temperature of the brake pad 12 is determined by providing a temperature sensor 47 on the brake pad 12.

  Current detection of the electromagnetic coil 33 as current detection means is performed by providing a current sensor 48 on the current input line. Normally, the current supplied to the electromagnetic coil 33 is a large current at the start of energization as shown in FIG. 7 (a), and then the current is lowered to a holding current, as shown in FIG. 7 (b). As shown, a pattern is used in which the current is almost constant from the start of energization to the interruption.

  The vibration detecting means of the electromagnetic brake 6 may be detected by providing a vibration sensor 49 in any part of the electromagnetic brake 6, but it is preferable to provide it in the vicinity of the braking arm 14 with the braking pad 12.

  The means for detecting the sound pressure of the electromagnetic brake 6 may be detected by providing a sound pressure sensor 50 anywhere around the electromagnetic brake 6, but it is preferable if it is provided near the brake drum 11 or the electromagnet 16.

  Next, based on FIG. 8, the operation of the elevator based on the determination of the state requirement 19 of the hoisting machine 8 will be described.

  First, in step 51, it is determined whether the braking torque is a predetermined value as confirmation of the braking force, that is, the braking torque. Next, in step 52, it is determined whether or not the output of the state requirement detecting means of each part is a predetermined value as confirmation of the operating force, position, and temperature of each part of the hoisting machine 8 with the braking force applied. Next, in step 53, it is determined whether or not the output of the state requirement 19 detection means of each part is a predetermined value as confirmation of the operating force, position and temperature of each part of the hoisting machine 8 in the braking force released state. Next, at step 54, the difference between the detection output in the braking force applied state and the detection output in the braking force release state, that is, the change width is taken, and it is determined whether or not this change width is a predetermined value. Next, in step 55, a braking force release operation is performed from the braking force applied state, and it is determined whether or not the output of the state requirement 19 detection means is a predetermined value as confirmation of the coil current, vibration, and sound pressure of the electromagnet 16. If all of the steps 51 to 55 are the same as the predetermined value, the elevator is determined to be normal and the operation is continued. If any of the steps 51 to 55 does not meet the predetermined value, the elevator determines that the elevator is abnormal, stops driving to the nearest floor, and notifies the management center 21.

  Next, the determination of the state requirement 19 as the confirmation 51 of the braking force, that is, the braking torque in FIG. 8 will be described based on FIG.

  In step 56, the braking force is applied and the car 3 is unloaded. In step 57, the motor 5 is energized to generate motor torque in the upward direction of the car 3. In step 58, it is confirmed by the encoder 7 that the brake drum 11 is not rotating, and in step 59, while measuring the motor current, the motor current is gradually increased to increase the motor torque. The braking torque corresponding to the motor current is detected from the table of the motor current versus the motor torque prepared in advance in step 60 (that is, the braking torque is generated because the motor 5 is stopped) and recorded in step 61. In step 62, it is determined whether or not a predetermined motor current corresponds to a predetermined braking torque. If No, the process returns to step 57 to further increase the motor current. If Yes in step 62, it can be determined that the braking torque is a predetermined value. In step 63a, the motor 5 is deenergized, and the process proceeds to the next process. If No in step 58, the brake drum 11 is rotating before reaching a predetermined motor current (that is, a predetermined braking torque), so that it is determined that the elevator is abnormal, and the motor 5 is determined in step 63b. Shut off the power to the next process.

  Next, the determination of the state requirement 19 as the confirmation 52 of the operating force, position, and temperature of each part of the hoisting machine 8 in the braking force addition state in FIG. 8 will be described based on FIG.

  As the state requirement 19, the pressing force of the braking pad 12 by the pressure sensor is set at step 64, the spring force of the braking spring 13 by the pressure sensor is set at step 65, the electromagnetic attraction force of the electromagnet 16 by the pressure sensor is set at step 66, and the position sensor. In step 67, the position of the braking arm 14 of the brake pad 12 by the position sensor is in step 67, the position of the braking arm 14 of the electromagnet 16 output engaging part by the position sensor is in step 68, the position of the movable part of the electromagnet 16 by the position sensor in step 69 In step 70, the position of the brake spring 13 is confirmed in step 70, the temperature of the brake pad 12 based on the temperature sensor is confirmed in step 71, the temperature of the electromagnet 16 based on the temperature sensor is confirmed in step 72, and the encoder temperature based on the temperature sensor is confirmed in step 73. Determine whether it is a predetermined value, and if it is as specified, make a normal determination and proceed to the next process Move. If the result of each of the detection means is out of the predetermined value, an abnormality is judged and the process proceeds to the next process.

  Next, the determination of the state requirement 19 as the operation force, position, and temperature confirmation 53 of each part of the hoisting machine 8 in the braking force release state in FIG. 8 will be described based on FIG. That is, as described with reference to FIG. 10, the detection results of the pressure sensor, the position sensor, and the temperature sensor as the detection means of the same parts are sequentially determined in step 74 to step 83 to determine whether or not the predetermined value. If the value is correct, it is judged as normal and the process proceeds to the next process. If the result of each of the detection means is out of the predetermined value, an abnormality is judged and the process proceeds to the next process.

  Next, based on FIG. 12, the judgment of the state requirement 19 as the confirmation 54 of the operating force and position change width of each part of the hoisting machine 8 between the braking force addition state and the braking force release state in FIG. explain. That is, in the state where the braking force is applied as shown in FIGS. 10 and 11, the result of the change width as the difference between the operating force and the position confirmation result of each part of the hoisting machine 8, that is, the pressing force of the braking pad 12 is set to step 84, the braking spring. 13 is step 85, electromagnetic attracting force of electromagnet 16 is step 86, braking arm 14 position of brake pad 12 is step 87, braking arm 14 position of electromagnet 16 output engaging part is step 88, and electromagnet 16 is movable. In step 89, the position of the brake spring 13 and the position of the brake spring 13 are sequentially determined in step 90 as to whether or not the predetermined value is the predetermined value. If the result of each of the detection means is out of the predetermined value, an abnormality is judged and the process proceeds to the next process.

  Next, the state requirement 19 determination as the coil current, vibration, and sound pressure confirmation 55 of the electromagnet 16 from the braking force addition state to the release operation in FIG. 8 will be described based on FIG.

  As the state requirement 19, the coil current of the electromagnet 16 by the current sensor 48 is step 91, the operation vibration of the electromagnetic brake 6 by the vibration sensor 49 is step 92, and the operation sound pressure of the electromagnetic brake 6 by the sound pressure sensor 50 is sequentially step 93. It is determined whether or not the value is a predetermined value. If the predetermined value is satisfied, a normal determination is made and the process proceeds to the next process. If the result of each of the detection means is out of the predetermined value, an abnormality is judged and the process proceeds to the next process.

  In this case, since the braking application state is in a stopped state, the coil current is zero, the vibration is in the dark vibration state, and the sound pressure is in the dark sound pressure state, and the range of change from this state to the braking release operation is detected. become. The coil current has the energization pattern shown in FIGS. 7A and 7B. In FIG. 7A, the maximum current and the holding current are set to predetermined values, and in FIG. The current or holding current is set to a predetermined value.

  In this embodiment, it is determined that an abnormality occurs unless all the condition requirements are satisfied. However, the braking force of the electromagnetic brake, the operating force of the braking force adding means, the temperature of the braking pad, or the braking force releasing means At least one of the operating conditions between the iron piece and the electromagnet, the temperature of the electromagnet, or the current of the electromagnet, the operating position of the braking force adding means, the operating force of the braking force releasing means, or the braking force addition By means of an input of at least one state requirement of a change width of an operating position between the control means and the braking force release means, or an operation vibration or sound pressure of the electromagnetic brake, a temperature of the electric motor, or a temperature of the encoder, When the state requirement determining means determines that there is an abnormality, the elevator may be driven to the nearest floor and stopped.

  Next, based on FIGS. 14 to 16, determination of the detection result of the detection unit of the state requirement 19 when the braking force is applied and when the braking force is released will be described.

  FIG. 14 is applicable to the following state requirements among the state requirements 19 in FIG.

The spring force as the operating force of the braking application means, the operating position of the braking application means, the electromagnetic attractive force of the electromagnet 16 as the operating force of the braking application means, the operating position of the braking release means, and the operation between the braking addition state and the braking release state The range of change in power and operating position
Predetermined value of detection result with braking force applied = target value (B1) ± tolerance (α1)
Predetermined value of detection result when braking force is released = target value (B2) ± tolerance (β1)
Predetermined value of change width result between braking force applied state and braking force released state = target value (B3) ± allowable range (γ1)
As described above, it is determined that the predetermined value is normal and the predetermined value is abnormal.

15 can be applied to the coil current of the electromagnet 16 in FIG. For example, as shown in FIG. 7 (a), when the coil current pattern is a large current at the start of energization and is set to a holding current after a certain time, the maximum current and the holding current at the start of energization are detected and the same as in FIG. Predetermined value of holding current = target value (B4) ± tolerance (α2)
Predetermined value of maximum current = target value (B5) ± tolerance (β2)
As described above, it is determined that the predetermined value is normal and the predetermined value is abnormal.

  As shown in FIG. 7B, when the coil current pattern is a constant current from the start of energization to the cutoff, one of detection of the maximum current or holding current in FIG. 7A may be used as the predetermined value.

  Moreover, FIG. 16 is applicable to the following state requirements among the state requirements 19 in FIG.

Brake pad temperature, electromagnet temperature, motor temperature, encoder temperature, brake operation vibration, brake operation sound, ie, target temperature, target vibration level, target sound pressure level are set to the target value (B6) ± tolerance (α3) As the predetermined value, it is determined that the predetermined value is normal and the predetermined value is abnormal.

  Next, another embodiment will be described based on FIGS. 17 (a) to 17 (c).

  FIGS. 17A to 17C show a position detection method according to another embodiment of the present invention. The difference from the embodiment of the present invention is that the position sensor can detect continuously, but in this embodiment, it is configured by an ON-OFF switch.

  As shown on the basis of the braking addition state of FIG. 17A, the position of the braking arm of FIG. 2 or the braking spring or iron piece of FIG. That is, for the predetermined value in the braking applied state shown in FIG. 14, the switch 95 corresponds to the target value (B1) -tolerable range (α1), and the switch 96 corresponds to the target value (B1) + allowable range (α1). The switch 97 corresponds to the target value (B2) −allowable range (β1), and the switch 98 corresponds to the target value (B2) + allowable range (β1). For the direction, the + side is the braking force release operation direction.

  Therefore, in the braking force release operation as shown in FIG. 17B, when the switch 94 responds first and the operation further proceeds while the detected body 94 is in the middle of the braking force release operation, the braking force release operation is executed as shown in FIG. Complete. 17A to 17C, the switch 97 responds and the switch 98 does not respond normally, and both the switches 97 and 98 respond or do not respond. Is judged abnormal. Similarly, when the detected body 94 moves in the anti-braking force releasing operation direction with the braking force applied, the switch 96 responds and the switch 95 does not respond normally, and both switches 95 and 96 respond. It is determined that there is a response or no response is abnormal.

  According to this embodiment, the continuous detection position sensor used in the above embodiment is expensive. On the other hand, since an ON-OFF switch such as a micro switch is used, an effect that the sensor can be configured at low cost is obtained.

  Furthermore, another embodiment will be described based on FIGS. 18 (a) and 18 (b).

  18A and 18B show a position detection method according to another embodiment of the present invention. The difference from the above embodiment is that the four ON-OFF switch configuration in the above embodiment is composed of two ON-OFF switches in this embodiment. That is, the ON-OFF switch is configured with the target value (B2) in the braking force releasing operation direction and the target value (B1) in the anti-braking force releasing operation direction of the detected body 94, and the position of the braking force releasing direction is predetermined. The value less than the value is regarded as abnormal, and the movement in the anti-braking force releasing direction of the position in the braking applied state is limited to an abnormal value above a predetermined value.

  As shown on the basis of the braking application state of FIG. 18A, the position of the braking arm of FIG. 2 or the braking spring of FIG. 5 or the iron piece of FIG. 4 as the detected body 94 is detected by two switches. That is, for the predetermined value in the braking applied state shown in FIG. 14, the switch 99 corresponds to the target value (B1), and the switch 100 corresponds to the target value (B2).

Accordingly, in the braking force releasing operation as shown in FIG. 18B, the state in which the braking force releasing operation is completed and the switch 100 is responding is determined to be normal, and the state in which there is no response is determined to be abnormal. Similarly, when the detected body 94 moves in the anti-braking force releasing operation direction with the braking force applied, the switch 99 determines that no response is normal and determines that the response is abnormal.

  According to this embodiment, by limiting the detection range, the number of ON-OFF switches such as microswitches is halved as compared with the above-described embodiment, and an effect that the sensor can be configured at a lower cost can be obtained.

It is a block diagram which shows the elevator apparatus which becomes one Example of this invention. It is a front view of the hoist as an example of FIG. FIG. 3 is a plan view of FIG. 2. It is a block diagram which shows engagement with an electromagnet and a braking arm by the AA view of FIG. It is sectional drawing of the brake spring part of FIG. FIG. 3 is a front view showing a brake pad portion of FIG. 2. FIG. 3 is a side view showing a brake pad portion of FIG. 2. FIG. 5 is a state diagram showing an example of a current excitation pattern of the electromagnet electromagnetic coil of FIG. FIG. 3 is a state diagram showing an example of a current excitation pattern of the electromagnet electromagnetic coil of FIG. It is a whole flowchart which shows the driving | operation of the elevator by determination of the state requirements of the hoisting machine of FIG. It is a flowchart which shows confirmation of the braking force, ie, braking torque, of FIG. It is a flowchart which shows the confirmation of the operation force of each part in the braking addition state of FIG. 7, a position, and temperature. It is a flowchart which shows confirmation of the operating force of each part in the brake release state of FIG. 7, a position, and temperature. 12 is a flowchart showing a difference in detection result between the braking applied state of FIG. 10 and the braking released state of FIG. FIG. 8 is a flowchart showing confirmation of coil current, vibration, and sound pressure from a braking force application state to a release operation in FIG. 7. It is a figure which shows judgment of the detection result of the detection means of the state requirement at the time of braking force addition and braking force cancellation | release. It is a figure which shows judgment of the detection result of the detection means of the state requirement at the time of braking force addition and braking force cancellation | release. It is a figure which shows judgment of the detection result of the detection means of the state requirement at the time of braking force addition and braking force cancellation | release. It is a conceptual diagram which shows the position detection method by other embodiment of this invention, and the braking addition state is shown. It is a conceptual diagram which shows the detection method of the position by other embodiment of this invention, and the state in the middle of brake cancellation | release is shown. It is a conceptual diagram which shows the detection method of the position by other embodiment of this invention, and the brake release state is shown. It is a conceptual diagram which shows the position detection method by further another embodiment of this invention, and the braking addition state is shown. It is a conceptual diagram which shows the position detection method by further another embodiment of this invention, and has shown the brake release state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drive sheave 2 Main loft 3 Car cage 4 Balance weight 5 Electric motor 6 Electromagnetic brake 7 Encoder 8 Hoisting machine 9 Brake force addition means 10 Brake force release means 11 Brake drum 12 Brake pad 13 Brake spring 14 Brake arm 15 Iron piece 16 Electromagnet 16a Connecting member 17 Control device 18 State requirement judgment means 19 State requirement 20 Installation site 21 Management center 22 Display means 35-38 Position sensor 40, 42, 43 Pressure sensor 44-47 Temperature sensor 49 Vibration sensor 50 Sound pressure sensor

Claims (9)

A drive sheave around which a main rope that engages a car on one side and a counterweight on the other side is wound, an electric motor that drives the drive sheave and is controlled by a control device, and rotation information of the drive sheave or the electric motor And a hoisting machine composed of an encoder for detecting position information of the car and an electromagnetic brake for braking the drive sheave and the electric motor, the electromagnetic brake pressing a braking pad against a rotating member of the hoisting machine. A braking force adding means for adding a braking force; and a braking force releasing means for releasing the braking force by an electromagnet that electromagnetically attracts the iron piece against the braking force adding means. And in the elevator apparatus provided with the state requirement judging means for outputting the operation command to the control device according to the state requirement,
At least one of the braking force of the electromagnetic brake, the operating force of the braking force adding means or the temperature of the braking pad, the operating position between the iron piece and the electromagnet of the braking force releasing means, the temperature of the electromagnet, or the current of the electromagnet One state requirement, an operating position of the braking force adding means, an operating force of the braking force releasing means, a change width of the operating position of the braking force adding means and the braking force releasing means, or the electromagnetic brake When the state requirement determination means determines that an abnormality has occurred due to the input of at least one state requirement of operating vibration or sound pressure, or the temperature of the motor, or the temperature of the encoder, the elevator is operated to the nearest floor and stopped. An elevator apparatus characterized by that.   The braking force of the electromagnetic brake is such that the motor is energized by the motor so as to be in the upward driving direction of the car when the car is not loaded and the braking force is applied, and the motor generates torque. 2. The elevator apparatus according to claim 1, wherein the motor torque obtained from a known motor current versus motor torque table is provided under the condition that the rotating member is not rotating.   The braking force adding means includes the braking pad that generates a braking force by being pressed against a brake drum as a braked body by a rotating member of the electric motor, and the braking pad is pressed toward the brake drum to cause a braking force. And a braking arm as a connecting member for connecting the braking piece and the braking spring, and the force of the braking spring as the operating force of the braking force adding means is the braking pad. It is detected by a pressure sensor that detects a force in a mechanism that connects the braking spring, and the operating position of the braking force adding means is a position sensor that detects a position in the mechanism that connects the braking pad and the braking spring. The elevator apparatus according to claim 1.   The braking force release means includes the iron piece connected to the brake pad, an electromagnet that electromagnetically attracts the iron piece, and a connecting member that connects the brake pad and the iron piece or the electromagnet. One is movable and the other is fixed, and is electromagnetically attracted against the urging force of the braking spring, releases the braking pad to release the braking force, and the electromagnet as the operating force of the braking force releasing means Is detected by a pressure sensor that detects a force in a mechanism that connects the braking pad and the iron piece or the movable side of the electromagnet, and the operating position of the braking force release means is the brake pad and the iron piece or The elevator apparatus according to claim 1, wherein the elevator apparatus is detected by a position sensor that detects a position in a mechanism that connects a movable side of the electromagnet.   The operation vibration or sound pressure of the electromagnetic brake is detected by arranging a vibration sensor installed in the electromagnetic brake to detect vibration or a sound pressure sensor installed in the vicinity of the electromagnetic brake to detect sound pressure. The elevator apparatus according to claim 1.   The elevator apparatus according to claim 1, wherein the temperature of the electric motor or the temperature of the encoder is detected by a temperature sensor installed in the electric motor or the encoder.   The elevator apparatus according to claim 3 or 4, wherein the position sensor is configured by a sensor that can continuously detect the position, or an ON-OFF response switch.   The operation of the hoisting machine state requirement judging means is performed by a forcible operation command at an elevator installation site or a remote forcing operation command from the management center, and the judgment result of the hoisting machine state judging means is sent to the management center. The elevator apparatus according to claim 1, wherein notification is made.   2. The elevator apparatus according to claim 1, wherein display means for displaying that the elevator is stopped is provided on each floor during operation of the state requirement determining means of the hoisting machine.

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