JPH072441A - Braking device for elevator - Google Patents

Abstract

PURPOSE:To facilitate measures at the time of happening a trouble by reducing an operating sound when a brake device is in braking and releasing. CONSTITUTION:In a brake device 40 for generating grasp braking force with a rail 6A, when the brake device 40 is released, by the first position detector 54 for detecting specific position just before colliding against an electromagnetic 45 of a movable piece 44 by attraction of the electromagnet 45 and by an output signal of this detector, electrification is made for interrupting an electromagnet current of flowing a current in a reverse direction thereto so as to reduce the speed. At the time of braking, by the second position detector 56 for detecting a specific position just before grasping the tail 6A by a brake shoe 43 energized by a spring 47 and by an output signal of this detector, an electromagnet current is conducted so as to reduce the speed, in a brake control circuit provided. Two electromagnet coils 46 are provided, and these coil currents are individually controlled to reduce an operating sound, and also, in the case of breaking the one electromagnet coil 46, applying a current to the other electromagnet coil 46 to release the braking device 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to control of an elevator braking device.

[0002]

2. Description of the Related Art FIG. 14 is a block diagram of a conventional elevator device.
Shown in. In the figure, 1 is an elevator hoist, and 2 is an elevator.
A warping wheel 3 for moving the rope position of the elevator is a rope for suspending the elevator car and the counterweight. 4 is an elevator
A pair of left and right car rails that guide the car 5 and a pair of left and right counterbalance rails that guide the counterweight 7. In the conventional elevator device thus configured, the hoisting machine 1 and the like are arranged above the hoistway, so that the machine room for accommodating them is provided.

Recently, since it is not necessary to provide a machine room in the upper part of the hoistway and the machine room can be arranged at any position, the elevator apparatus to which the linear motor shown in FIG. 15 is applied has come to be used. In the figure, 6A is a rail for guiding the counterweight 11. The counterweight 11 is provided with a linear motor 17 that generates thrust and moves up and down the counterweight 11, and a brake device 18 that engages with the rail 6A to generate a braking force. The linear motor 17 is supplied with electric power having a variable voltage and a variable frequency by a power supply device (not shown) to generate a rectilinear magnetic field and generate a secondary conductor 19.
And thrusts the counterweight 11 up and down. The car 15 of the elevator is guided by the car rail 6A, is connected to the counterweight 11 by the rope 13 via the return wheel 17, and moves up and down as the counterweight 11 moves up and down. Reference numeral 10 is a lower buffer.

Thus, the linear mode as shown in FIG.
In the tare elevator device, the breaker device 18 incorporated in the counterweight 11 is generally constructed as shown in FIG. When the brake coil 26 is not excited, the movable piece 24 is separated from the electromagnet 25 by the spring pressure of the electromagnet opening spring 27, and the brake arm 22 is urged by the rotation mechanism 29 to rotate about the fulcrum shaft 28 as a fulcrum. A brake 23 provided at the tip of the brake arm 22 grips the rail 6A to generate a braking force. Next, when the break coil 26 is excited, the electromagnet 25 moves the movable piece 24 to the spring 2.
Since it sucks against the spring force of 7, the brake arm 22
Is urged by a rotating mechanism 29 to rotate about a fulcrum shaft 28 as a fulcrum, and a brake 23 provided at the tip of the brake arm 22 separates from the rail 6A to open the brake device 18. .

Next, FIG. 17 shows a control circuit for controlling the brake device 18 shown in FIG. 16, and FIG. 18 shows a timing chart when the brake is opened, that is, when the electromagnet 25 is excited. A timing chart when the break is activated, that is, when the exciting current of the electromagnet is cut off will be described with reference to FIG. In FIG. 17, reference numeral 31 is a back contact that operates during break operation to cut off the exciting current of the electromagnet 25, and 34.
Is a resistor for an absorber, and 35 is a diode for an absorber. Reference numeral 30 is a power source for braking, 32 is a current limiting resistor that limits the exciting current after the electromagnet 25 attracts the movable piece 24, and 33 is an opening after the electromagnet 25 attracts the movable piece 24 and inserts the current limiting resistor 32. This is a current limiting switch for limiting the exciting current of the break coil 26. Current limit switch 33
Although the mounting position is not shown in the figure, the limit switch is attached to a suction position of the electromagnet 25, that is, a position where the electromagnet 25 is turned off at the brake open position, so that the limit switch is turned off.

18 and 19, S1 indicates the operation of the electromagnet excitation signal, which is a signal operable when the back contact 31 is closed and the current limiting switch 33 is ON. S2
Indicates the operation of the break release signal, and when the movable piece 24 reaches the suction completion position, the limit switch described above is turned on.
When FF is performed, that is, the break release signal is turned on and the movable piece 24 is separated from the electromagnet 25 and reaches a predetermined position, the limit switch is reset to the on state. S
3 indicates a change in the terminal voltage applied to the coil 26, and S
Reference numeral 4 represents a change in the exciting current flowing through the coil 26, and S5 represents a change in the gap length between the movable piece 24 and the electromagnet 25.
Next, the electromagnet 25 shown in FIG. 17 when the brake is opened
The operation will be described with reference to FIG. When the electromagnet excitation signal is output as shown at S1 at time t1, the terminal voltage E is applied to the coil 26 as shown at S3, and the exciting current of the electromagnet 25 is shown as O → A at S4. It increases by a predetermined time constant, and at time t2, the magnet 2
The suction force of 5 overcomes the spring pressure, and the movable piece 24
Starts moving, and a speed electromotive force is induced in the coil 26 as the movable piece 24 moves, so that the exciting current is A → S4.
As shown in B → C shown in S4, the exciting current increases again with a predetermined time constant because the velocity electromotive force disappears when the movable piece 24 is attracted to the electromagnet 25 at time t3. Next, at time t4, when the movable piece 24 reaches the position where the suction is completed, the break open signal is turned on, that is, when the above-mentioned limit switch is turned off, the current limiting switch 33 is turned off and the current limiting resistor 32 is inserted to excite. The current decreases as C → D shown in S4. While the electromagnet 25 is attracting the movable piece 24, no gap is generated in the magnetic circuit of the electromagnet, the magnetic resistance is reduced, and an attractive force that overcomes the spring pressure is generated with a small exciting current. It is designed to limit the current.

Next, the operation of the electromagnet 25 during the breaking operation of the one shown in FIG. 17 will be described with reference to FIG.
19, the same reference numerals as those in FIG. 18 denote the same or corresponding parts. When the electromagnet excitation signal is cut off as shown at S1 at time t5, the terminal voltage is also cut off as shown at S3, and the exciting current of the electromagnet 25 is attenuated by a predetermined time constant as L → H shown at S4. . At this time, the current flows back through the resistor 34 for the absorber and the diode 35 for the absorber.
Then, when the exciting current of the break coil 26 becomes equal to or less than the predetermined current value, that is, at the point H shown at S4 at time t6, the spring pressure overcomes the attractive force of the magnet 25, and the movable piece 2 moves.
4 starts to separate from the electromagnet 25, and the brake arm 22 moves
The operation is started in the direction of gripping the ruler 6A. And the movable piece 2
When 4 reaches the specified position, the above limit switch turns on.
The break release signal is turned off, but this signal is not used here. Furthermore, the movable piece 2
4 moves a moving electromotive force 24 in the coil 26.
Since it is generated in the opposite polarity to that during suction,
2. The current increases from H to J as shown in S4 until time t7 when the brake 23 grips the rail 6A. When the brake arm 22 and the brake squeeze 23 grip the rail 6A, the speed electromotive force disappears, so that the exciting current is S according to the time constant.
It becomes zero as it is attenuated as J → K shown in FIG.

[0008]

In the conventional rope type elevator shown in FIG. 14, the brake device is installed in the machine room and away from the living room. Didn't really matter. However, in the linear motor drive type elevator device shown in FIG. 15 in which the brake device using the electromagnet configured as described above is installed on the lifting body such as the balance weight and the car of the elevator, the lifting body is Since the breaker device operates while moving up and down the hoistway, the brake is applied to the living room near the hoistway when the brake is activated.
Impact sound when the brake attached to the key grips the rail, and impact due to collision between the electromagnet and the movable piece when the electromagnet attracts the movable piece when the brake is opened. Sound is a problem. Further, since the break device is installed on the lifting body, the break device or the break device and the break device are combined.
There is a problem in that it takes time to deal with a case where a cable connecting the control devices fails.

The present invention has been made to solve the above-mentioned problems, and the impact force when the brake attached to the brake arm grips the rail during the operation of the brake. In addition, by reducing the impact force due to the collision between the electromagnet and the movable piece when the electromagnet attracts the movable piece at the time of releasing the brake, the operation noise at the time of braking and opening is reduced, Further, the present invention provides a braking device for an elevator, which is easy to handle when the brake device fails.

[0010]

[MEANS FOR SOLVING THE PROBLEMS] An elevator according to the present invention
The braking device for the elevator is an elevator that moves up and down the elevator hoistway, an electromagnet that is installed on the elevator and that drives the movable piece against the spring force, and a hoistway that moves up and down along the elevator. An elevator equipped with a brake device having a installed rail and a braking member that engages with the spring force to generate a braking force, and a brake control means for controlling an exciting current of the electromagnet. In the braking device, the brake control means has a first operation of attracting the movable piece to the electromagnet by increasing the exciting current of the electromagnet for a predetermined period of time while the electromagnet is driving the movable piece and then interrupting or reducing the current. While the electromagnet is opening the movable piece, an exciting current of the electromagnet is applied for a predetermined time and then cut off to perform any one of the second operations for engaging the braking member and the rail.

Also, in the elevator braking device according to the present invention, the brake device detects the first position of the movable piece with respect to the electromagnet during the first operation and sends a signal to the brake control means. One of a first position detector for outputting and a second position detector for detecting a second position of the braking member with respect to the rail during the second operation and outputting a signal to the brake control means. However, the brake control means, by inputting the signal of the first position detector, the exciting current of the electromagnet is held for a predetermined time, interrupted or reduced, and then increased to increase the first action to attract the movable piece to the electromagnet, and It is also possible to perform either control of the second operation in which the excitation current of the electromagnet is supplied for a predetermined time by the input of the signal of the second position detector and then the current is cut off to engage the braking member and the rail.

Further, in the braking device for an elevator according to the present invention, the brake control means applies the first exciting current to the electromagnet while the electromagnet is driving the movable piece, and outputs the signal of the first position detector. May be applied to the electromagnet for a predetermined time, and then a second excitation current in the opposite direction to the first excitation current may be applied to the electromagnet for a predetermined time, and then an excitation current in the same direction as the first excitation current may be applied to attract the movable piece to the electromagnet. .

Also, in the braking device for an elevator according to the present invention, the brake control means is arranged in a direction opposite to the holding current of the electromagnet that holds the movable iron core while the movable piece is being opened by the electromagnet. After passing the current for the required time, the reverse current is cut off for the required time, and by inputting a signal from the second position detector, the holding current is passed in the same direction as the holding current for a predetermined time, and then the reverse current is passed. May be cut off.

The elevator braking device according to the present invention further includes an elevating body for raising and lowering an elevator hoistway, an electromagnet installed on the elevating body for attracting a movable piece against a spring force, and the above-mentioned. A rail installed in the hoistway along the lifting direction of the lifting body.
And a brake device having a braking member that engages with the spring force to generate a braking force, and an elevator braking device that includes a brake control unit that controls an exciting current of the electromagnet, The break device may be provided with two electromagnet coils having different time constants and a break control means for controlling the exciting currents of the two electromagnet coils.

Further, in the braking device for an elevator according to the present invention, the brake control means has one of two electromagnet coils having different time constants, whichever has a larger time constant, while the electromagnet opens the movable piece. A holding current for holding the movable piece may be applied to the electromagnet coil, and after a lapse of a predetermined time, the current of the electromagnet coil having the smaller time constant may be controlled to attract the movable piece.

Also, in the elevator braking device according to the present invention, the two electromagnet coils having different time constants of the brake device installed on the lifting body are provided with the brake control means installed on the building side. If there is a failure in one of the two electromagnet coils or the elevator cable, the brake control means attracts the movable piece to the other electromagnet coil, which is connected through the elevator cable. The brake device may be opened by supplying a current necessary for the operation.

The elevator braking device according to the present invention further comprises an elevator body for raising and lowering the elevator hoistway, an electromagnet installed on the elevator body for attracting the movable piece against the spring force, and A rail installed in the hoistway along the lifting direction of the lifting body.
Brake device having a plurality of brake devices having a brake member that engages with the spring force to generate a braking force, and a brake control device that controls the exciting current of the electromagnet. In the above, the break control means is installed on the building side, and the electromagnet coils of the plurality of breaking devices are connected in parallel through the elevator cable, and the above-mentioned brake is installed on the building side.
The control means may be connected in series.

Further, in the elevator braking device according to the present invention, each of the plurality of brake devices detects the first position of the movable piece with respect to the electromagnet while the electromagnet is driving the movable piece, and then the brake device. A first position detector that outputs a signal to the control means,
The brake control is provided with any one of a second position detector that detects the second position of the braking member with respect to the rail and outputs a signal to the brake control means while the electromagnet is opening the movable piece. The means includes a first operation in which the exciting current of each electromagnet is blocked or reduced for a predetermined time by the logical sum of the inputs of the signals of the respective first position detectors and then increased to attract the movable iron core to the electromagnet, and each of the first operation. According to the logical sum of the inputs of the signals of the two position detectors, either of the second operations for engaging the braking member and the rail by shutting off after applying the exciting current to each electromagnet for a predetermined time is performed. be able to.

[0019]

In the elevator braking device according to the present invention, the brake control means increases the movable piece by increasing the exciting current of the electromagnet after the exciting current is driven for a predetermined time, cut off or reduced while the electromagnet is driving the movable piece. Either the first operation of attracting to the electromagnet or the second operation of engaging the braking member with the rail by shutting off after energizing the exciting current of the electromagnet for a predetermined time while the electromagnet is opening the movable piece is performed. Therefore, the impact force when the electromagnet and the movable piece are attracted or when the braking member and the rail are engaged is softened.

Further, in the elevator braking device according to the present invention, the brake control means is increased after the exciting current of the electromagnet is turned on or off for a predetermined time by the input of the signal from the first position detector. The first operation of attracting the movable piece to the electromagnet by means of the second position detector and the second operation of engaging the braking member with the rail by interrupting the excitation current of the electromagnet for a predetermined time by inputting a signal from the second position detector. Since either control is performed, the impact force when the electromagnet and the movable piece are attracted or when the braking member and the rail are engaged is softened.

Further, in the elevator braking device according to the present invention, the brake control means applies the first exciting current to the electromagnet while the electromagnet is driving the movable piece, and the signal of the first position detector is supplied. The second magnetizing current in the opposite direction to the first magnetizing current is supplied to the electromagnet for a predetermined time by an input, and then the same magnetizing current as the first magnetizing current is supplied to attract the movable piece to the electromagnet. Relieves the impact force during adsorption.

Further, in the elevator braking device according to the present invention, the brake control means causes the electric current in a direction opposite to the holding current of the electromagnet that holds the movable piece by suction while the electromagnet opens the movable piece. The current is interrupted for a required time, and the current is interrupted for a required time.By inputting a signal from the second position detector, the exciting current in the same direction as the holding current is applied for a predetermined time and then the exciting current is interrupted. -Reduce the impact force when engaging the lever.

In the elevator braking device according to the present invention, the brake device is provided with two electromagnet coils having different time constants, and the brake control means controls the exciting currents of the two electromagnet coils. Controls the impact force when the electromagnet and the movable piece are attracted or when the braking member and the rail are engaged.

In the elevator braking device according to the present invention, the brake control means is such that, while the electromagnet is opening the movable piece, the electromagnet having the larger time constant of the two electromagnet coils having different time constants. A holding current for holding the movable piece is applied to the coil, and after a lapse of a predetermined time, the current of the electromagnet coil with the smaller time constant is controlled to attract the movable piece, so the impact force during attraction of the electromagnet and the movable piece is controlled. .

Further, in the elevator braking apparatus according to the present invention, when one of the two electromagnet coils or the elevator cable is out of order, the brake control means uses the other electromagnet coil. The breaking device is opened by supplying the current necessary to attract the movable piece.

Further, in the elevator braking device according to the present invention, the brake control means is installed on the building side, and a plurality of the braking devices are connected in parallel through the elevator cable so that the building side can operate. Since the brake control means is connected in series, if one of the electromagnet coil and the elevator cable is out of order, the building side can change the connection of a plurality of brake devices.

Further, in the elevator braking device according to the present invention, the brake control means uses the logical sum of the signal inputs of the first position detectors of the plurality of braking devices to generate the exciting current of each electromagnet. Is cut off or reduced for a predetermined time and then increased to attract the movable piece to the electromagnet;
One of the second operations for engaging the braking member and the rail by shutting off after applying an exciting current to each electromagnet for a predetermined time by the logical sum of the signals input from the respective second position detectors of the device. Since the control is performed, even in the case of a plurality of break devices, the impact force at the time of operation of each break device can be softened.

[0028]

【Example】

First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. Figure 1
(A) is an explanatory view of the low noise type brake device of the present invention, in which the same reference numerals as those in FIG. 15 designate the same or corresponding parts. In the figure, when the brake coil 46 is not excited, the movable piece 4 is moved by the spring pressure of the electromagnet opening spring 47.
4 is separated from the electromagnet 45, and the brake arm 42 is urged by the rotation mechanism 49 to rotate about the fulcrum shaft 48 as a fulcrum.
A brake 43 provided at the tip of the brake arm 42 grips the rail 6A to generate a braking force. Next, when the brake coil 46 is excited, the electromagnet 45 moves to the movable piece 44.
Since the brake arm 42 is attracted against the spring force of the spring 47, the brake arm 42 is urged by the rotation mechanism 49 to rotate about the fulcrum shaft 48 as a fulcrum, and the brake arm 43 provided at the tip of the brake arm 42 is rotated. Separates from the rail 6A to open the breaking device 40. The electromagnet 45 is a movable piece 4
4 is a first position detector provided on the electromagnet 45, which has a light-shielding sensor in which a shield plate 55 provided on the movable piece 44 shields a light beam when it is about to attract 4. The first position detector 54 has a movable piece 44 when the electromagnet 45 is excited.
The position immediately before adsorbing is detected and a signal is output. 56
The second position detection has a light transmission type sensor that operates so that the shield plate 57 provided on the brake arm 42 allows the light beam to pass when the brake 6 is about to grasp the rail 6A. It is a vessel. In the second position detector 56, the electromagnet 45 is demagnetized, and the spring pressure of the spring 47 causes a breaker.
The frame 42 rotates and the brake 43 detects the position immediately before gripping the rail 6A and outputs a signal. FIG. 1B is an explanatory view showing another mode of mounting the second position detector, in which the same reference numerals as those in FIG. 1 indicate the same or corresponding portions.
In this example, the second position detector 56A is provided on the electromagnet 45. The second position detector 56A moves the movable piece 4 when the rail 6A reaches a position just before gripping the brake 43.
4 has a light-transmitting sensor that operates so that the shielding plate 57A provided to pass light rays, and the electromagnet 45 and the movable piece 4
The gap length of 4 indirectly detects the position immediately before the brake 43 grips the rail 6A.

A break control circuit for controlling the break device 40 shown in FIG. 1A will be described with reference to FIG. 2A. In the figure, reference numeral 62 is an electromagnet current command generator that generates a current command Icom to be applied to the brake coil 46. The electromagnet current command generator 62 receives the output signals of the first position detector 54 and the second position detector 56 described above, and generates a predetermined current command Icom. Reference numeral 63 compares the current command Icom with the feedback current Ifb from a DCCT (DC current transformer) 61 for detecting the current flowing through the break coil 46, and outputs an ON / OFF signal to the base amplifier 64 to output the transistor 65. Is a comparator for controlling the current of the. FIG. 2B shows a method of controlling the current of the comparator 63. The comparator 63 generates a signal (OUT output = L) for turning off the transistor 65 when Icom ≧ Ifb, and a signal (OUT output = H) for turning on the transistor 65 when Icom <Ifb. . Reference numeral 21 is a contactor contact that interrupts current with a mechanical contact when an abnormality occurs. In this way, the break control circuit 63A is
The current flowing through the coil 46 is controlled.

FIG. 3 shows that the break control circuit 63A has a
When the brake is opened, that is, when the electromagnet 45 is excited, the timing chart for muffling control is shown. In FIG. 4, when the brake is activated, that is, when the electromagnet 45 is demagnetized, the brake shoe 43 moves the rail 6A. Timing chart for muffling control when grasping
It is In FIGS. 3 and 4, S10 represents the operating state of the electromagnet excitation signal output to the brake control circuit 63A from the elevator controller (not shown) when the elevator is started and stopped. S11 shows the operating state of the output signal of the first position detector 54, and S12 shows the operating state of the output signal of the second position detector 56. S13 shows the operating state of the current command Icom output by the electromagnet current command generator 62, and S14 shows the brake coil 4 in accordance with the current command Icom.
6 shows a change in the exciting current flowing in No. 6. S15 is an electromagnet 45
The change in the gap between the movable piece 44 and the movable piece 44 is shown.

Next, the breaking device 40 shown in FIG.
The operation of the brake control circuit 63A shown in FIG. 2A will be described with reference to FIGS. In FIG. 3, at time t1, the brake control circuit 63A outputs an electromagnet excitation signal, which is an ON signal, to the brake control circuit 63A to release the brake from the elevator control device. At the same time that the contact 21 is closed, the electromagnet current command generator 62 outputs the current command Icom shown in S13 and S14.
The current is increased so that the exciting current shown in (1) matches the current command Icom. Excitation current exceeds a specified value and electromagnet 45
When the attracting force of B moves to overcome the spring pressure, the movable piece 44 starts moving at time t2 and immediately before contacting the electromagnet 45 at time t2, as shown at S11, the first position is detected at time t3. The device 54 is a current command generator 62 for an electromagnet.
Output a signal to. The current command generator 62 for the electromagnet is S
As shown in 13, the current command Icom is set to zero, and the exciting current is reduced as shown in S14. The attraction force decreases as the exciting current decreases, and the movable piece 44 moves to the time t3 shown in S15.
The gap length g1 is left as in the section up to t5, and the vehicle is stopped or decelerated for a moment. Then, at a time t4 after a lapse of a predetermined time from the time t3, the electromagnet current command generator 62 again increases the current command to Icom1 as shown in S13. Therefore, the exciting current increases again as shown at S14, and the movable piece 44 starts moving again at the time t5 to t6 shown at S15. Then, it moves until the gap length g becomes zero. In this case, since the gap length g1 is extremely shorter than the gap length g, the movable piece 44 is not sufficiently accelerated, and the speed at the time of collision between the movable piece 44 and the electromagnet 45 becomes very small, resulting in collision at the time of attraction. The sound is very low. Further, after the suction is completed, as shown in S13, the electromagnet current command generator 6
2 sets the current command to Icom2 and limits the exciting current to the holding current as in S14 to reduce the heat generation of the break coil 46 during holding.

Further, in FIG. 4, when the elevator arrives at a predetermined floor, the brake control circuit 63A is operated to activate the brake from the elevator controller at time t8.
The electromagnet excitation signal, which is the off signal shown in S10, is output. By the output of the off signal, the electromagnet current command generator 62 sets the current command Icom2 to zero as shown in S13, so that the exciting current decreases as shown in S14, and the time t
At 9, the movable piece 44 begins to separate from the electromagnet 45, and when the gap length g1 is reached, the first position detector 54 turns off. Further, just before the break arm 42 rotates and the break shoe 43 grips the rail 6A as the movable piece 44 moves,
As shown in S12, the second position detector 56 is turned on at time t10, and as shown in S13, the electromagnet current command generator 62 restarts the current command as Icom3, and S1
4, the exciting current rises, and the electromagnet 45 generates an attractive force. Therefore, the movable piece 44 and the breaker
The frame 42 is temporarily stopped or decelerated at time t11 as shown in S15. After a lapse of a predetermined time, at time t12, the electromagnet current command generator 62 sets the current command Icom3 to zero as shown in S13, and the movable piece 4 is moved by the spring pressure of the spring 47.
4 and the break arm 42, the time t as shown in S15.
The movement started at 13 and the brake-43 got the rail 6A.
Grab At this time, the speed of the brake-43 is very small, so the brake-43 has the rail 6A.
The impact noise generated when the vehicle collides with is extremely low. Also,
After a predetermined time has passed after the break operation, the contact 21 opens. By thus opening the current at the mechanical contact 21 after controlling the current to zero by the transistor 65, safety is improved and the life of the contact is extended. In order to perform the control described above and improve the command followability of the energizing current to the brake coil 46, the electric time constant of the electromagnet 45 must be designed to be sufficiently smaller than the operating time of the movable piece 44. Is.

FIG. 5 shows an example of an electromagnet current command generator 62 for performing the control shown in FIGS. In the figure, 100 is a central processing unit CP
U and 101 are ROMs for storing control programs, and 102
Is a RAM for storing data. 103 is the CPU 10
A D / A converter for generating a current command Icomn according to a command of 0, and a timer 104 for counting time. 10
Reference numeral 5 is an input from the first position detector 54 and the second position detector 56, or a brake excitation signal input from another linear motor driving inverter, and a linear motor driving signal. It is an input / output interface for outputting a signal indicating a break operation to the inverter and an output signal for turning on / off the contactor for opening / closing the contact 21.

Next, the operation of the CPU 100, which is the central processing unit, will be described with reference to FIG. The CPU 100 has a process T1.
If the excitation signal is on, the rise of the excitation signal is confirmed in step T2, and if it is rise, the contact 21 is closed in step T3, and the current command Icom is generated in the D / A converter 103 in step T4. Then, the electromagnet 45 is excited and starts to attract the movable piece 44. The CPU 100 then performs the process T
When the first position detector 54 detects a predetermined position and outputs a signal in step 5, the current command of the D / A converter 103 is changed to Icom = 0 in step T6, and at the same time, the timer is operated in step T7. After confirming that the predetermined time has passed in step T8, the D / A converter 10 is checked in step T9.
When the current command of No. 3 is set to Icom1 and at the same time the timer is operated in step T10 and it is confirmed in step T11 that the time required for the electromagnet 45 to complete the attraction of the movable piece 44 has elapsed, the D / A converter in step T12. The current command of the controller 103 is controlled to Icom2.

In step T1, if the excitation signal is off, the CPU 100 confirms the fall of the excitation signal in step T13, and if it is fall, in step T14 the current command Icom of the D / A converter 103. = 0, the electromagnet 45
When the second position detector 56 detects the predetermined position immediately before the brake 43 holds the rail 6A in step T15 and outputs a signal, the D / A converter 10 is output in step T16.
When the current command of 3 is set to Icom3 and at the same time the timer is operated in step T17 and it is confirmed that a predetermined time has elapsed in step T18, the current command is set to Icom3 = 0 in step T19.
After that, the brake device 40 is operated, and after a lapse of a predetermined time, the contact 21 is opened in step T21 to complete a series of operations.

Embodiment 2 Next, an embodiment of the present invention in which the influence of the operation delay of the brake device due to the residual magnetic flux of the electromagnet is reduced will be described. FIG. 7 shows a brake in which the influence of the operation delay of the brake device is reduced.
In the explanatory diagram of the control circuit, the same reference numerals as those in FIG. 2 indicate the same or corresponding portions. In the figure, reference numerals 70 and 71 denote DC power supplies for applying + EDC to the transistor 78 and -EDC to the transistor 79, respectively. The transistor 78 applies a positive voltage to the break coil 46, the transistor 79 applies a negative voltage to the break coil 46, and the electromagnet residual command is generated by a command from an electromagnet current command generator (not shown) during the steps of attracting and opening the electromagnet. By properly adding so as to cancel the magnetic flux, the break control circuit 73A reduces the operation delay of the break device. Incidentally, 74 and 76 are absorber diodes, and 75 and 77 are absorber resistors.

Here, the brake control circuit 7 shown in FIG.
The operation when the electromagnet of 3A is excited (when the brake is opened) and when the electromagnet is opened (when the brake is operated) will be described with reference to the timing chart shown in FIG. In the figure, S20 shows the operating state of the electromagnet excitation signal output to the brake control circuit 73A from the elevator controller (not shown) when the elevator is started and stopped. S21 indicates the operating state of the output signal of the first position detector 54, and S22 indicates the second position detector 5.
6 shows the operating state of the output signal of No. 6. S23 shows the operation state of the current command Icom output by the current command generator for the electromagnet, and S24 shows the brake coil 4 according to the current command Icom.
6 shows a change in the exciting current flowing in No. 6. S25 is an electromagnet 45
The change in the gap between the movable piece 44 and the movable piece 44 is shown.

Next, the brake control circuit 73A shown in FIG.
8 and the operation of the brake device 40 shown in FIG.
Will be described. In the figure, at time t1, the brake control circuit 73A outputs an electromagnet excitation signal which is an ON signal at S20 to release the brake from the elevator controller, and the contact 21 is closed at the same time. The electromagnet current command generator 62 sends the current command shown in S23 to Icom.
Then, the transistor 78 is controlled to increase the exciting current shown in S24 so that it coincides with the current command Icom. When the exciting current exceeds a predetermined value and the attraction force of the electromagnet 45 overcomes the spring pressure of the spring 47, as shown in S25, the movable piece 44 starts moving at time t2 and immediately before contact with the electromagnet 45, S21. At time t3, the first position detector 54 outputs an output signal, and the electromagnet current command generator 62 turns off the transistor 78 and simultaneously controls the transistor 79 to output a negative current command as shown in S23. There is an Icom4 command. Negative excitation current is S24
When the current is applied, the residual magnetic flux is rapidly demagnetized and the speed of the movable piece 44 is rapidly reduced. By performing such control, the time from time t3 to t3a is shortened.
Next, the current command generator 62 for the electromagnet uses the current command Icom4.
When a predetermined time has elapsed after the command, the transistor 79 is turned off, and at the same time, the transistor 78 is controlled to set the current command to Icom1 and the electromagnet 45 is set at time t6 as shown in S23.
Is attracted to the movable piece 44. After that, the current command is set to Icom2. By controlling the break control circuit 73A, the operation time when the break device 40 is opened is shortened, and the movable piece 4 is opened.
4 and the electromagnet 45 can reduce the collision noise at the time of contact collision.

When the brake device 40 is in operation, the brake control circuit 73A sends an electromagnet excitation signal, which is an off signal shown in S20, to the brake control circuit 73A in order to operate the brake at time t8. Is output and the current command generator 62 for the electromagnet issues a current command Icom5 in the opposite direction to the current command Icom2 as shown in S23, the transistor 78 is turned off and at the same time the transistor 79 is controlled to control the residual magnetic flux as in S24. Is canceled, that is, a negative exciting current is applied, the residual magnetic flux is rapidly demagnetized, and the movable piece 44 is rapidly separated from the electromagnet 45 at time t9. By performing such control, the time from time t8 to t9 is shortened. At time t9, when the movable piece 44 starts to separate from the electromagnet 45 and the gap length g1 is reached, the first position detector 54 is turned off. Further, as the movable piece 44 moves, the breaker breaks.
Immediately before the brake 42 rotates and the brake 43 grips the rail 6A, the second position detector 56 is turned on at time t10 as shown in S22, and as shown in S23, the current for the electromagnet is When the command generator 62 commands a current command Icom3 in the opposite direction to the current command Icom5, the transistor 79 is turned off and at the same time the transistor 78 is controlled to generate an exciting current in the same direction as the current command Icom2 as shown in S24. Since the suction force is generated, the movable piece 44 and the break arm 42 are temporarily stopped or decelerated at time t11 as shown in S25. Then, after a lapse of a predetermined time, the current command Icom3 is set to zero at time t12 as shown in S23, the spring 4
Due to the spring pressure of 7, the movable piece 44 and the break arm 42 start to move at time t13 as shown in S15 and the
Kish-43 grabs the rail 6A. Break control circuit 7
The control of 3A shortens the operation time of the brake device 40 at the time of operation, and the brake device 43 and the rail 6A.
It is possible to reduce the impact sound generated between the two.

Embodiment 3 Next, an embodiment of the present invention in which the break coil of the electromagnet is divided into two and each break coil is controlled by a break control circuit will be described. Fig. 9 shows the iron core of the electromagnet and the
It is explanatory drawing of the electromagnet part which divided the coil into two. In the figure, 45A and 45B are electromagnets, 46A and 46B are brake coils for exciting the electromagnets 45A and 45B, and 47A.
Is a spring that biases the electromagnets 45A and 45B in the direction of separating them. The break coils 46A and 46B are designed to have different electric time constants. Here, the break coil 46A has a turn number N, a resistance R, and a current I, and the turn number N / 10, a resistance R / 10, and a current 1 of the break coil 46B.
When 0I is set, the brake coils 46A and 46A are in a steady state.
When the calorific value is calculated when B is the same ampere pattern, the former is R · I2 and the latter is 10R · I2. The reactance at the same permeance P is N2.
P, the latter is (N2.P) / 100. Therefore, comparing the time constants, the former is (N2 .P) / R and the latter is (N2 .P) / (10R), which is 1/10 of the former.

A break control circuit for controlling the break device having the electromagnets 45A and 45B having different time constants shown in FIG. 9 will be described with reference to FIG. In the figure, 4
6A and 46B are brake coils, 34A and 34B are absorber diodes, 35A and 35B are absorber resistors, and the first position detector 54 and the second position detector 56 are shown in FIG. The electromagnet portion is provided in the same manner as that shown in FIG. When the contact 21 is closed, a voltage + EDC is applied to the break coil 46A having a large time constant, and a holding current is supplied through the current limiting resistor 38. The holding current is applied in an amount necessary for the electromagnets 45A and 45B to maintain the attracted state against the spring 47A. A current controlled by the break control circuit 83A is supplied to the break coil 46B having a small time constant. Reference numeral 82 is a current command generator for the electromagnet, which commands the current command Icom to the comparator 83. The comparator 83 compares the feedback current Ifb of the DC current transformer 71 with the current command Icom to form an upper arm transistor. A required on / off signal to 78A or the lower arm transistor 79A is given to the upper / lower short-circuit prevention circuit 84. The vertical short circuit prevention circuit 84 includes an upper arm transistor 78A and a lower arm transistor 78A.
When switching the on / off of the arm transistor 79A, the upper and lower arm transistors are prevented from being short-circuited, and when the current command of the electromagnet current command generator 82 is positive, the upper arm transistor is turned off.
The drive base amplifier 84A for the drive transistor 78A is operated to control the upper arm transistor 78A to supply a positive required current to the break coil 46B so that the current command of the electromagnet current command generator 82 is negative. In this case, the brake coil 4 is operated by operating the base amplifier 84B for driving the lower arm transistor 79A to control the lower arm transistor 79A.
A negative required current is applied to 6B.

Next, the electromagnets 4 having different time constants shown in FIG.
A timing chart when 5A and 45B are attached to the break device 40 shown in FIG. 1 and controlled by the break control circuit 83A shown in FIG. 10 will be described with reference to FIG. In the figure, S30 shows the state of generation of a linear motor lifting thrust for lifting the counterweight of the elevator, and S31.
Shows the generation state of the linear motor static thrust force which generates the thrust force on the linear motor according to the counterweight and the unbalanced weight of the car and keeps the balance weight stationary. S32 represents the current command of the exciting current supplied to the break coil 46A, that is, the state of the command signal for operating the contactor for opening and closing the contact 21 for supplying the holding current when the gap between the electromagnets 46A and 46B is zero. In the figure, S33 shows the state of the current command issued from the electromagnet current command generator 82 for supplying the required exciting current to the break coil 46B. S34 represents an equivalent current resulting from the combination of the exciting currents applied to the break coils 46A and 46B, and a combined magnetic flux corresponding to the equivalent current is generated.

Next, the operation of the above-mentioned brake control circuit 83A will be described with reference to the drawings. In order to prevent a shock when the brake device is opened at the time of starting the elevator, before the car door is completely closed, the linear weight for driving the elevator should be balanced with the unbalanced weight of the car. The static thrust that was present was t1
Occasionally, it is generated as shown in S31. At the same time as the generation of the static thrust, the brake control circuit 83A generates a command signal for supplying a holding current to the break coil 46A having a long time constant and closes the contacts 21 and 21A, as shown in S34. The holding current rises according to the time constant. With the holding current applied to the break coil 46A, the electromagnet 46
Since there is no suction force for sucking A and B, the brake device keeps generating a predetermined braking force. Simultaneously with the completion of the car door closing, the electromagnet current command generator 82 closes the contact 21B and, at the same time, commands the current command Icom6 shown in S33 to the comparator 83 to energize the break coil 46B and the break coil 46A. By controlling the upper arm transistor 78A, a required current required to attract the electromagnets 46A and 46B is energized in synergistic relation with the magnetic flux generated by the holding current. The exciting current shown in the time t2 to t3 of S34 is a combination of the holding current and the required current.

By pre-exciting the break coil 46A having a large time constant, the break coils 46A and 46B are substantially excited.
The total time constant of the break coil 46B has a small time constant.
Is equivalent to the time constant of. When the first position detector 54 detects the predetermined position immediately before the both electromagnets are attracted by the first position detector 54 at the time t3 when the electromagnets 46A and 46B start to attract, the electromagnet current command generator 82 causes the direction opposite to the holding current as shown in S33. The current command Icom7 for supplying the exciting current is commanded to the comparator 83 to turn off the upper arm transistor 78A and simultaneously control the lower arm transistor 79A. The electromagnet 4 accelerated by the attractive force due to the application of the exciting current in the opposite direction
6A and 46B slow down or stop rapidly. At time t4 when a predetermined time has elapsed from time t3, the electromagnet current command generator 82 commands the comparator 83 to supply the current command Icom8 for energizing the holding current in the same direction as the holding current, as shown in S33. When the arm transistor 79A is turned off, the upper arm transistor 78A is controlled and at the same time both electromagnets are re-accelerated and attracted. The current command generator 82 for the electromagnets has a function of generating the upper arm transistor 78A at time t5 after the adsorption of both electromagnets.
Is turned off to set the current of the break coil 46B to zero, and keep only the holding current of the break coil 46A. An elevator control device (not shown) switches the stationary thrust of the linear motor to the lifting thrust at time t5, so that the car can start the lifting while preventing the shock caused by the opening of the brake device.

During braking of the brake device, the brake control circuit 83A turns off the command signal shown in S32 to turn the contact 2 on.
At the same time that 1 is opened to cut off the holding current, the electromagnet current command generator 82 causes the current command Icom9 as shown in S33.
To the comparator 83, and the lower arm transistor 7
9A is controlled to supply an exciting current in a direction opposite to the holding current to quickly demagnetize the residual magnetic flux of the electromagnets to accelerate the separation between the electromagnets 46A and 46B. Electromagnets 46A and 46B
When the second position detector 56 detects the predetermined position immediately before the brake 43 grips the rail 6A at the time t7 after the separation of the current command, the electromagnet current command generator 82 causes the current command as shown in S33. Icom10 is instructed to the comparator 83, the lower arm transistor 79A is turned off, and at the same time, the upper arm transistor 78A is controlled to pass a current in the same direction as the holding current for a predetermined time to reduce the separation speed of both electromagnets. By turning off the upper arm transistor 78A again at time t8, the brake 43 grips the rail 6A and generates a braking force. Incidentally, the contact 21B of the brake device after braking is opened. By controlling in this way, the speed at which the brake-43 grips the rail 6A is reduced, so that the impact noise is suppressed.

Embodiment 4 An embodiment of another embodiment of the breaking device having the above two breaking coils will be described. FIG. 12 is an explanatory view of the relationship between the car and the counterweight in the hoistway and the control device for controlling them. In the figure, reference numeral 11 is a counterweight for mounting an armature of a linear motor and a braking device for generating lifting thrust, and lifting and lowering a hoistway, and 13 is a wheel for connecting a car 15 to a counterweight 11 via a return wheel 14. Numerals 19 and 19 are secondary conductors which engage with the armature of the linear motor to generate an eddy current and give thrust to the armature of the linear motor, and the same reference numerals as those shown in FIG. 15 are the same or equivalent. It shows a part. The balance weight 11 is equipped with a brake device having an electromagnet shown in FIG.
The terminals P1, N1, P2, and N2 shown in FIG.
Through the bull 40, it is connected to a brake control circuit 83A installed in the controller 94 of the linear motor elevator installed on the building side. With such a configuration, even if one of the break coils 46A, 46B fails, or if one of the conductors of the cable 40 is cut for some reason, one of the break coils will be temporarily cut. Since a large current can be applied to open the brake device, the reliability of the elevator is improved.

[Embodiment 5] An elevator braking device according to an embodiment of the present invention having a plurality of brake devices will be described. FIG. 13 is a connection diagram of a plurality of brake devices installed on the counterweight 11 shown in FIG. 12 and a brake control device installed on the building side. In the figure, a counterweight 11 is an armature 17A of a linear motor, an encoder 91 for speed detection and an encoder 9
4 has a touch roller 92 attached to an encoder shaft for rotating 1 by friction with a rail, and a break coil 46D, 46E, 46F, 46G.
A brake device for the stand is installed. Further, in each of the break devices, first position detectors 54D, 54E, 54F, 5 for detecting a predetermined position immediately before the electromagnet attracts the movable piece by the electromagnet.
Second position detectors 56D, 56E, 56F, 56 for detecting a predetermined position immediately before the 4G and the brake grab the rail.
G is provided.

Reference numeral 94 is a controller for the linear motor elevator installed on the building side, and is an armature 17 for the linear motor.
An inverter unit 95 for supplying a variable power source to A and a break control circuit 63B for controlling the above four break devices are installed. Break coils 46D, 46E, 46
F and 46G are connected in parallel by a cable 40A, connected in series on the side of the controller 94 of the linear motor elevator, and connected to the brake control circuit 63B via terminals P10 and N13. First position detectors 54D, 54E, 54
F and 54G are connected in parallel by the cable 40A, and a logical sum circuit 96 for taking the logical sum of the respective signals of the first position detector on the side of the controller 94 of the linear motor elevator, and a second position detector 56D, Similarly, in 56E, 56F, and 56G, the OR circuit 9 that ORs the signals of the second position detector
The signal obtained by the logical sum processing is input to the break control circuit 63B through 7 to control the muffling of the above-mentioned break device. Here, the reason for using the logical sum of the signals from each position detector is that when the logical sum is not used because there is variation in each brake device and each position detector attached to each brake device. Is a braking device in which the gap just before the electromagnet attracts the movable piece or just before the brake grips the rail becomes too small and the deceleration and stop of the movable piece or the brake cannot be controlled. . In this case, there is no problem in the normal operation of the brake device, but this point is improved in terms of sound deadening, and sufficient sound deadening control becomes possible. When the control is performed by using the logical sum, a brake device in which deceleration and stop control are performed earlier than a predetermined position appears, but this is not a problem for muffling control.

With such a configuration, a plurality of break devices can be controlled by one break control circuit 63B, so that each break device is provided with a break control circuit. Compared to low cost. Also,
By connecting multiple brake coils in series through the cable 40A on the building side, even if one brake coil is disconnected for some reason and the car stops between floors, the connection will be changed on the building side. By energizing the other normal brake coil and opening the brake device, a large current is applied to the armature 17A of the linear motor for a short time, and the brake is moved to the nearest floor with the failure brake dragged. Can rescue passengers.

In the above-mentioned embodiment, the example in which the brake device is installed on the counterweight is shown, but the brake device can be installed on the car. In addition, although a sensor using light for the first position detector and the second position detector is shown, a sensor using a magnetic or laser beam in addition to the capacitive displacement sensor is used for the position detector. Can be

[0051]

As described above, according to the present invention, in the elevator braking device, the brake control means makes the exciting current of the electromagnet for a predetermined time while the electromagnet of the braking device drives the movable piece. The first action is to increase or attract the movable piece to the electromagnet after disconnection or flow reduction, and to shut off after the energizing current of the electromagnet is applied for a predetermined time while the electromagnet is opening the movable piece and the braking member and rail. Since it is configured to perform any one of the second operations of engaging the brakes, the impact force at the time of attracting the electromagnet and the movable piece or at the time of engaging the braking member and the rail is softened, and There is an effect that the operation sound at the time of opening or operation can be suppressed.

Further, the brake control means causes the exciting current of the electromagnet to be attracted to the electromagnet by increasing the exciting current of the electromagnet for a predetermined period of time or after the current is interrupted or reduced by the input of the signal from the first position detector. By the input of a signal from the second position detector, either of the second operations for engaging the braking member and the rail by cutting off after energizing the exciting current of the electromagnet for a predetermined time is configured. There is an effect that the impact force at the time of attracting the electromagnet and the movable piece or at the time of engaging the braking member and the rail is softened, and the operation noise at the time of opening or operating the brake device can be suppressed.

Further, the brake control means supplies the first exciting current to the electromagnet while the electromagnet is driving the movable piece, and reverses the first exciting current to the electromagnet by inputting the signal of the first position detector. Since the second exciting current in the direction is applied for a predetermined time and then the exciting current in the same direction as the first exciting current is applied to attract the movable piece to the electromagnet, the brake device can be opened in a short time. Further, there is an effect that the impact force at the time of attracting the electromagnet and the movable piece can be softened and the operation sound at the time of opening the break device can be suppressed.

Further, the break control means, while the electromagnet is opening the movable piece, applies a current in a direction opposite to the holding current of the electromagnet holding the movable piece by suction for a required time, and then interrupts the current for a required time. However, by inputting the signal of the second position detector, the exciting current in the same direction as the holding current is passed for a predetermined time, and then the exciting current is cut off, so that the brake device can be opened in a short time. The effect that the impact force at the time of engaging the braking member and the rail can be softened and the operation sound at the time of operation of the brake device can be suppressed is obtained.

Further, since the brake device is provided with two electromagnet coils having different time constants, and the brake control means is configured to control the exciting currents of the two electromagnet coils, the attraction of the electromagnet and the movable piece. There is an effect that the impact force at the time of engagement of the braking member and the rail is controlled, and the operation noise at the time of opening or operating the brake device can be suppressed.

Further, the break control means supplies the holding current for holding the movable piece to the electromagnet coil having the larger time constant of the two electromagnet coils having different time constants while the electromagnet opens the movable piece. However, since the movable piece is attracted by controlling the current of the electromagnet coil with the smaller time constant after the elapse of a predetermined time, the breaker device can be opened in a short time, and at the time of attraction of the electromagnet and the movable piece. This has the effect of controlling the impact force and suppressing the operating noise when the brake device operates.

If there is a failure in either of the two electromagnet coils or the elevator cable, the blur
Since the control means is configured to open the brake device by passing a current necessary for attracting the movable piece to the other electromagnet coil, it is possible to prevent the elevator device from moving up and down due to the continuous application of the brake. It has the effect of preventing.

Further, in the elevator braking device according to the present invention, the brake control means is installed on the building side, and a plurality of the braking devices are connected in parallel through the elevator cable so that the building side is connected. Since the brake control means is connected in series, if one of the electromagnet coils or the elevator cable has a failure, the connection of a plurality of brake devices can be changed on the building side. Since it is configured so that the normal brake device is opened, it is possible to prevent the elevator device from being unable to move up and down due to the continuous application of the brake.

Further, the break control means has a plurality of breaks.
A first operation in which the exciting current of each electromagnet is cut off or reduced for a predetermined time and then increased to attract the movable piece to the electromagnet by the logical sum of the input signals of the first position detectors of the device, Any one of the second operations for engaging the braking member and the rail by shutting off after applying an exciting current to each electromagnet for a predetermined time by the logical sum of the signals input from the respective second position detectors of the device Since it is configured to control the electromagnets of the plurality of breaking devices and the movable piece when the movable pieces are attracted, the brake member and the brake device are controlled.
There is an effect that the impact force at the time of engagement of the lever can be softened surely and the operation noise at the time of opening or operating the breaking device can be suppressed.

[Brief description of drawings]

FIG. 1 is an explanatory view of a low noise type brake device for an elevator according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a brake control circuit according to an embodiment of the present invention.

FIG. 3 is a timing chart when the brake is released from the brake control circuit according to the embodiment of the present invention.

FIG. 4 is a timing chart at the time of a brake operation of the brake control circuit according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram of an electromagnet current command generator according to an embodiment of the present invention.

FIG. 6 is a flowchart of a central processing unit of a current command generator for an electromagnet according to an embodiment of the present invention.

FIG. 7 is an explanatory diagram of a brake control circuit in which an operation delay of the brake device according to the embodiment of the present invention is reduced.

FIG. 8 is a timing chart of a brake control circuit in which an operation delay of the brake device according to the embodiment of the present invention is reduced.
It is

FIG. 9 is an explanatory diagram of an electromagnet portion in which an iron core and a break coil of the electromagnet according to the embodiment of the present invention are divided into two parts.

FIG. 10 is an explanatory diagram of a break control circuit for controlling a break device having two break coils according to an embodiment of the present invention.

FIG. 11 is a timing chart of a break control circuit for controlling a break device having two break coils according to an embodiment of the present invention.

FIG. 12 is an explanatory diagram showing the relationship between the car and the counterweight in the hoistway and the control device for controlling the hoisting and lowering operations according to the embodiment of the present invention.

FIG. 13 is a connection diagram of a plurality of brake devices installed on a counterweight according to an embodiment of the present invention and a control device for controlling the same.

FIG. 14 is a configuration diagram of a conventional elevator device.

FIG. 15 is a conceptual diagram of an elevator device using a linear motor.

FIG. 16 is a block diagram of a conventional brake device.

FIG. 17 is an explanatory diagram of a control circuit of a conventional brake device.

FIG. 18 is a timing chart when the brake of the control circuit of the conventional brake device is released.

FIG. 19 is a timing chart at the time of a brake operation of the control circuit of the conventional brake device.

[Explanation of symbols]

5 baskets 7, 11, counterweights 4A, 6A rails 18, 40 brake devices 23, 43 brakes 24, 44 movable pieces 25, 45, 45A, 45B electromagnets 26, 46, 46A, 46B brakes Key coil 27, 47, 47A Spring 40, 40A cable 54 First position detector 56 Second position detector 63A, 63B, 73A, 83A Break control circuit 94 Linear motor elevator controller 96, 97 Logic Sum circuit

Claims (9)

[Claims] 1. An elevator for raising and lowering an elevator hoistway, an electromagnet installed on the elevator for driving a movable piece against a spring force, and an elevator installed in the hoistway along the ascending and descending direction of the elevator. Of the elevator including a brake device having a braking member that engages with the above-described rail and a spring force to generate a braking force, and a brake control means that controls the exciting current of the electromagnet. In the braking device, the brake control means includes a first operation in which the electromagnet excites the exciting current of the electromagnet by driving the movable piece for a predetermined period of time, interrupting or reducing the current, and then increasing to attract the movable piece to the electromagnet. Is a braking device for an elevator, wherein any one of the second operations for engaging the braking member and the rail by cutting off the energizing current of the electromagnet for a predetermined time while opening the movable piece is performed. 2. A break device, which detects a first position of a movable piece with respect to an electromagnet during the first operation and outputs a signal to a break control means, and the second position detector. During operation, the brake control means comprises any one of a second position detector that detects a second position of the braking member with respect to the rail and outputs a signal to the brake control means. The first operation of attracting the moving piece to the electromagnet by increasing the exciting current of the electromagnet after inputting the signal of the position detector for a predetermined time or after disconnecting or reducing the current, and by inputting the signal of the second position detector After the exciting current is applied for a predetermined time, it is cut off and connected to the braking member.
The elevator braking apparatus according to claim 1, wherein any one of the second operations for engaging the lever is performed. 3. The brake control means supplies a first exciting current to the electromagnet while the electromagnet is driving the movable piece, and inputs a signal from the first position detector to the electromagnet to reverse the first exciting current. 3. The elevator braking device according to claim 2, wherein after the second exciting current in the direction is applied for a predetermined time, an exciting current in the same direction as the first exciting current is applied to attract the movable piece to the electromagnet. 4. The break control means applies a current in a direction opposite to the holding current of the electromagnet holding the movable iron core by suction for a required time while the movable piece is being opened by the electromagnet. 3. The electromagnetic wave is cut off for a required time, and by inputting a signal from the second position detector, an exciting current in the same direction as the holding current is passed for a predetermined time and then the exciting current is cut off. Elevator braking system. 5. An elevating body for moving up and down an elevator hoistway, an electromagnet installed on the elevating body for attracting a movable piece against a spring force, and an electromagnet installed in the hoistway along the up-down direction of the elevating body. Of the elevator including a brake device having a braking member that engages with the above-described rail and a spring force to generate a braking force, and a brake control means that controls the exciting current of the electromagnet. In the braking device, the braking device has a different time constant.
An elevator braking device comprising: one electromagnet coil; and a brake control means for controlling an exciting current of the two electromagnet coils. 6. The break control means supplies a holding current for holding the movable piece to an electromagnet coil having a larger time constant of the two electromagnet coils having different time constants while the electromagnet is opening the movable piece. 7. The elevator braking apparatus according to claim 5, wherein after a lapse of a predetermined time, the movable piece is attracted by controlling the current of the electromagnet coil having the smaller time constant. 7. The two electromagnet coils having different time constants of the brake device installed on the lifting body are connected to the brake control means installed on the building side through an elevator cable, and the two above-mentioned two coils are connected. If one of the electromagnet coils or the elevator cable fails, the brake control means applies the current necessary for attracting the movable piece to the other electromagnet coil to cause the brake device. 6. The elevator braking apparatus according to claim 5, wherein the brake is opened. 8. An elevating body for raising and lowering an elevator hoistway, an electromagnet installed on the elevating body for attracting a movable piece against a spring force, and an electromagnet installed on the hoistway along the ascending and descending direction of the elevating body. A plurality of break devices having a braking member that engages with the above-mentioned rail by the spring force to generate a braking force, and a break control means for controlling the exciting current of the electromagnet. In the elevator braking device, the brake control means is installed on the building side, and the electromagnet coils of the plurality of brake devices are connected in parallel through the elevator cable, and the brake control means is connected to the brake control means on the building side. An elevator braking device characterized by being connected in series. 9. A first position detector for detecting the first position of the movable piece relative to the electromagnet and outputting a signal to the brake control means while the electromagnet is driving the movable piece. And a second position detector that detects the second position of the braking member with respect to the rail and outputs a signal to the brake control means while the movable piece is opened by the electromagnet. A first control operation in which the control means causes the exciting current of each electromagnet to be interrupted or reduced for a predetermined time by the logical sum of the inputs of the signals of the respective first position detectors and then increases to attract the movable iron core to the electromagnet; One of the second operations for engaging the braking member and the rail by cutting off after applying an exciting current to each electromagnet for a predetermined time is performed by the logical sum of the signals input from the respective second position detectors. The elevator braking device according to claim 8, wherein the braking device is an elevator.