JP2002145541A - Brake device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake device of elevator capable of reducing the operation noise in braking and releasing the brake device and easily repairable at a failure. SOLUTION: The elevator is a rope-type elevator with a car and a balance weight connected to each other with a rope moved upward/downward in an elevator shaft. The brake device mounted in the elevator shaft and engaged with a rail for generating the braking force comprises a first position detector for detecting a prescribed position of a movable block just before the movable block attracted by an electromagnet collides with the electromagnet when the brake device is released, a second position detector for cutting the electric current of the electromagnet or feeding the electric current in the reverse direction to reduce the speed by the output signal of the first position detector and for detecting a prescribed position of a brake shoe energized by a spring just before the brake shoe is engaged with the rail when braking, and a brake control circuit for feeding the electric current of the electromagnet to reduce the speed by the output signal of the second position detector.

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 deflector 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 for guiding the car 5 of the car, and a pair of right and left counterweight rails for guiding the counterweight 7 are shown. In the conventional elevator device configured as described above, since the hoisting machine 1 and the like are arranged above the hoistway, a machine room for accommodating them is provided.

Recently, since a machine room does not need to be provided above a hoistway and can be arranged at an arbitrary position, an elevator apparatus using a linear motor shown in FIG. 15 has been used. In the figure, 6A is a rail for guiding the counterweight 11. The counterweight 11 is provided with a linear motor 17 for generating thrust and moving up and down the counterweight 11 and a brake device 18 for engaging with the rail 6A to generate a braking force. The linear motor 17 is supplied with power of a variable voltage and variable frequency by a power supply device (not shown), generates a linear magnetic field, and generates a secondary conductor 19.
And the balance weight 11 is raised and lowered. The elevator car 15 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 denotes a lower buffer.

[0004] Thus, a linear motor as shown in FIG.
In a conventional elevator device, a brake device 18 incorporated in the counterweight 11 generally has a configuration 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 spring 27 for opening the electromagnet, and the brake arm 22 is urged by the rotating 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 brake coil 26 is excited, the electromagnet 25 moves the movable piece 24 to the spring 2.
7 against the spring force of 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 is separated from the rail 6A to open the brake device 18. .

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 released, that is, when the electromagnet 25 is excited. FIG. 19 shows a timing chart at the time of the brake operation, that is, at the time of cutting off the exciting current of the electromagnet. In FIG. 17, reference numeral 31 denotes a back contact which operates during the brake operation to cut off the exciting current of the electromagnet 25;
Is an absolute resistor and 35 is an absolute diode. Reference numeral 30 denotes a brake power supply, 32 denotes a current limiting resistor for limiting an exciting current after the electromagnet 25 attracts the movable piece 24, and 33 denotes a current limiting resistor 32 which is opened after the electromagnet 25 attracts the movable piece 24 and the current limiting resistor 32 is inserted. This is a current limiting switch for limiting the exciting current of the brake coil 26. Current limit switch 33
Although the mounting position is not shown, the switch is turned off by a limit switch attached to a position where the electromagnet 25 is turned off at the attraction position of the electromagnet 25, that is, the brake opening position.

In FIGS. 18 and 19, S1 indicates the operation of the electromagnet excitation signal, and 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 brake release signal, and when the movable piece 24 reaches the position where the suction is completed, the above-mentioned limit switch is turned off.
When the FF is performed, that is, when the brake release signal is turned on and the movable piece 24 separates from the electromagnet 25 and reaches a predetermined position, the limit switch is reset to the ON state. S
3 indicates a change in terminal voltage applied to the coil 26,
4 indicates a change in the exciting current flowing through the coil 26, and S5 indicates a change in the gap length between the movable piece 24 and the electromagnet 25.
Next, the electromagnet 25 shown in FIG.
Will be described with reference to FIG. When the electromagnet excitation signal is output at time t1 as shown in S1, the terminal voltage is applied to the coil 26 as shown in S3, and the excitation current of the electromagnet 25 is changed from O → A in S4 as shown in S4. It increases by a predetermined time constant, and at time t2, the magnet 2
5 can overcome the spring pressure, and the movable piece 24
Starts moving, and a velocity electromotive force is induced in the coil 26 with the movement of the movable piece 24, so that the excitation current is changed from A → S4 shown in S4.
When the movable piece 24 is completely attracted to the electromagnet 25 at the time t3, the speed electromotive force disappears, and the exciting current increases again by the predetermined time constant as shown by B → C shown in S4. Next, at time t4, when the movable piece 24 reaches the position where suction is completed, the brake release 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 like C → D shown in S4. While the electromagnet 25 is attracting the movable piece 24, there is no gap in the magnetic circuit of the electromagnet, so that the magnetic resistance is reduced and an attractive force that overcomes the spring pressure is generated with a small exciting current. The current is limited.

Next, the operation of the electromagnet 25 during the braking 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 indicate 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 attenuates by a predetermined time constant such as L → H shown at S4. . At this time, current flows through the resistor 34 for the absorber and the diode 35 for the absorber.
When the exciting current of the brake coil 26 becomes equal to or less than a predetermined current value, that is, the point H shown in S4 at time t6, the spring pressure overcomes the attraction force of the magnet 25 and the movable piece 2
4 starts to move away from the electromagnet 25, and the brake 22
The operation is started in the direction of grasping the rule 6A. And the movable piece 2
When 4 reaches the predetermined position, the above-mentioned limit switch is turned on.
And the brake release signal is turned off, but this signal is not used here. Furthermore, the movable piece 2
4, the speed electromotive force is applied to the coil 26 by the movable piece 24.
Is generated with a polarity opposite to that at the time of suction.
2. The current increases from H to J as shown in S4 until time t7 when the brakes 23 grip the rail 6A. When the brake arm 22 and the brake -23 grip the rail 6A, the speed electromotive force disappears.
J → K shown in FIG. 4 is attenuated and becomes zero.

[0008]

In the conventional rope-type elevator shown in FIG. 14, since the installation position of the brake device is located in the machine room and away from the living room, the operating noise of the brake device is increased. Did not matter much. However, in the linear motor drive type elevator apparatus shown in FIG. 15 in which the brake device using the electromagnet configured as described above is installed on an elevator such as a counterweight or an elevator car, the elevator is used. Since the brake device operates while moving up and down the hoistway, the brakes are applied to the living room near the hoistway when the brake is activated.
The impact sound when the brake attached to the arm grabs the rail, and the impact due to the collision between the electromagnet and the movable piece when the electromagnet sucks the movable piece when the brake is opened Sound matters. Further, since the brake device is installed on the elevating body, the brake device or the brake device and the brake device are combined.
There is a problem that it takes time and trouble to take measures when a failure occurs in a cable connecting the key control devices.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has an impact force when a brake attached to a brake arm grips a rail during a brake operation. In addition, when the brake is released, the impact force caused by the collision between the electromagnet and the movable piece when the electromagnet sucks the movable piece when the brake is released reduces the operating noise at the time of braking and opening, It is another object of the present invention to provide an elevator braking device that can easily take measures when a brake device breaks down.

[0010]

SUMMARY OF THE INVENTION An elevator according to the present invention is provided.
The braking device of the elevator is a rope-type elevator in which the car and the counterweight are connected to each other by a rope and lifted in the hoistway by a hoist, and installed in the hoistway and movable against the spring force. A brake device having an electromagnet for driving the piece, a rail provided on a hoistway along the vertical direction of the hoist, and a braking member for generating a braking force by engaging with the spring force; In an elevator braking apparatus provided with a brake control means for controlling an excitation current of the electromagnet, the brake control means cuts off or cuts off the excitation current of the electromagnet for a predetermined time while the electromagnet is driving the movable piece. A first operation in which the movable piece is increased and then attracted to the electromagnet after the flow, and a second action in which the electromagnet energizes the exciting current of the electromagnet for a predetermined time while the movable piece is opened, and then cuts off to engage the braking member with the rail. To control either of the two actions That.

In the brake device for an elevator according to the present invention, the brake device detects the first position of the movable piece with respect to the electromagnet and sends a signal to the brake control means during the first operation. One of a first position detector for outputting a signal and a second position detector for detecting a second position of the braking member with respect to the rail and outputting a signal to the brake control means during the second operation. The brake control means includes: a first operation for causing the electromagnet to attract the movable piece by increasing or decreasing the exciting current of the electromagnet for a predetermined period of time by inputting a signal of the first position detector and then cutting or cutting the current; After the excitation current of the electromagnet is supplied for a predetermined time in response to the input of the signal from the second position detector, any one of the second operations for engaging the braking member and the rail by cutting off the current may be performed.

Also, in the elevator braking apparatus according to the present invention, the brake control means includes: a first excitation current supplied to the electromagnet while the electromagnet is driving the movable piece; Then, a second exciting current in a direction opposite to the first exciting current is applied to the electromagnet for a predetermined time, and then an exciting current of the same direction as the first exciting current is applied to the electromagnet to attract the movable piece to the electromagnet. .

Further, in the elevator braking apparatus according to the present invention, the brake control means may include a step of controlling a current flowing in a direction opposite to a holding current of the electromagnet holding the movable core while the electromagnet is opening the movable piece. After the current is supplied for the required time, the current in the reverse direction is cut off for the required time, and the excitation current in the same direction as the holding current is supplied for a predetermined time after the input of the signal of the second position detector. May be cut off.

Further, the elevator braking apparatus according to the present invention is a rope type elevator in which a car and a counterweight are connected to each other by a rope, and the hoisting machine moves up and down the hoistway. And an electromagnet that attracts the movable piece against the spring force, and a rail that is installed in the hoistway along the vertical direction of the elevating body to generate a braking force by engaging with the spring force. A braking device having a member and a brake control means for controlling the exciting current of the electromagnet, wherein the braking device has two electromagnet coils having different time constants; A brake control means for controlling the exciting currents of the two electromagnet coils may be provided.

Further, in the elevator braking apparatus according to the present invention, the brake control means may include, while the electromagnet is opening the movable piece, one of the two electromagnet coils having different time constants having the larger time constant. A holding current for holding the movable piece may be supplied to the electromagnet coil, and after a predetermined time has elapsed, the current of the electromagnet coil having the smaller time constant may be controlled to attract the movable piece.

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

Also, the elevator braking apparatus according to the present invention is a rope type elevator in which a car and a counterweight are connected to each other by a rope, and the hoisting machine moves up and down the hoistway. And an electromagnet that attracts the movable piece against the spring force, and a rail that is installed in the hoistway along the vertical direction of the elevating body to generate a braking force by engaging with the spring force. A brake control device for an elevator, comprising: a plurality of brake devices each having a member; and brake control means for controlling an exciting current of the electromagnet. The electromagnetic coils of the brake device may be connected in parallel through an elevator cable, and may be connected in series with the brake control means on the building side.

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 relative to the electromagnet while the electromagnet is driving the movable piece. A first position detector that outputs a signal to the key control means,
A second position detector for detecting a second position of the braking member with respect to the rail and outputting a signal to the brake control means while the electromagnet opens the movable piece; The means is configured to interrupt or reduce the exciting current of each electromagnet for a predetermined period of time by the logical sum of the input of the signal of each first position detector, and then increase the current to attract the movable iron core to the electromagnet; and According to the logical sum of the input of the signals of the two-position detector, one of the second operations of engaging the braking member and the rail by interrupting after applying an exciting current to each electromagnet for a predetermined time is performed. be able to.

[0019]

In the elevator braking apparatus according to the present invention, the brake control means increases the exciting current of the electromagnet after a predetermined time or cuts or reduces the current while the electromagnet is driving the movable piece, thereby increasing the movable piece. Either a first operation for causing the electromagnet to be attracted or a second operation for engaging the braking member and the rail by interrupting the electromagnet while supplying the exciting current of the electromagnet for a predetermined time while the movable piece is being opened is performed. Therefore, 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 reduced.

Further, in the elevator braking apparatus according to the present invention, the brake control means increases after the excitation current of the electromagnet is cut off or reduced for a predetermined time by the input of the signal of the first position detector. A first operation for attracting the movable piece to the electromagnet and a second operation for engaging the braking member and the rail by interrupting the excitation current of the electromagnet for a predetermined time in response to the input of the signal from the second position detector. Since either control is performed, the impact force when the electromagnet and the movable piece are attracted or the braking member and the rail are engaged is reduced.

Further, in the elevator braking apparatus according to the present invention, the brake control means supplies the first exciting current to the electromagnet while the electromagnet is driving the movable piece, and outputs the signal of the first position detector. When a second exciting current in a direction opposite to the first exciting current is applied to the electromagnet for a predetermined time by input, an exciting current of the same direction as the first exciting current is applied to attract the movable piece to the electromagnet. Absorbs the impact force during adsorption.

Further, in the elevator braking apparatus according to the present invention, the brake control means may be configured such that, while the electromagnet is opening the movable piece, a current in a direction opposite to a holding current of the electromagnet holding the movable piece by suction is held. After the current is supplied for a required time, the current is interrupted for the required time, and when the excitation current in the same direction as the holding current is supplied for a predetermined time after the input of the signal of the second position detector, the excitation current is interrupted. -Relieves the impact force when the handle is engaged.

Further, 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 current of the two electromagnet coils. The impact force is controlled when the electromagnet and the movable piece are attracted or when the braking member and the rail are engaged.

Further, in the elevator braking apparatus according to the present invention, the brake control means may be configured such that, while the movable member is being opened by the electromagnet, the electromagnet having the larger time constant among the two electromagnet coils having different time constants. A holding current for holding the movable piece is supplied to the coil, and after a lapse of a predetermined time, the current of the electromagnet coil having the smaller time constant is controlled to attract the movable piece, so that the impact force when the electromagnet and the movable piece are attracted is controlled. .

Also, in the elevator braking device according to the present invention, when either one of the two electromagnetic coils or the elevator cable has a failure, the brake control means connects the other electromagnetic coil to the other. A current necessary for sucking the movable piece is supplied to open the brake device.

Further, in the elevator braking apparatus according to the present invention, the brake control means is installed on the building side, and a plurality of brake apparatuses are connected in parallel through the elevator cable, and are connected on the building side. Since it is connected in series with the brake control means, the connection of a plurality of brake devices can be changed on the building side in the event of a failure in either the electromagnet coil or the elevator cable.

Further, in the braking device for an elevator according to the present invention, the brake control means includes an exciting current of each electromagnet based on a logical sum of an input of a signal of a first position detector of each of the plurality of braking devices. The first operation of shutting off or reducing the flow for a predetermined time and then increasing and attracting the movable piece to the electromagnet;
According to the logical sum of the input of the signals of the respective second position detectors of the keying device, one of the second operations of applying an exciting current to each of the electromagnets for a predetermined time and then cutting off to engage the braking member with the rail. Since the control is performed, even in the case of a plurality of brake devices, the impact force during the operation of each brake device is reliably reduced.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 (a) is an explanatory view of a low noise type brake apparatus according to the present invention.
The same reference numerals indicate the same or corresponding parts. In the drawing, when the brake coil 46 is not excited, the movable piece 44 is separated from the electromagnet 45 by the spring pressure of the spring 47 for opening the electromagnet, and the brake arm 42 is urged by the rotating mechanism 49 to support the fulcrum shaft 48 as a fulcrum. The brake arm 42
Brake 43 provided at the end of the rail 6A
To generate a braking force. Next, when the brake coil 46 is excited, the electromagnet 45 attracts the movable piece 44 against the spring force of the spring 47, so that the brake arm 42 is urged by the rotating mechanism 49 to rotate about the fulcrum shaft 48 as a fulcrum. And a brake provided at the tip of the brake arm 42.
43 is separated from the rail 6A to open the brake device 40. A first position 54 provided on the electromagnet 45 has a light shielding type sensor in which a shielding plate 55 provided on the movable piece 44 performs an operation of blocking light when the electromagnet 45 approaches the movable piece 44. It is a detector. The first position detector 54 is
A position immediately before the electromagnet 45 is excited to attract the movable piece 44 is detected, and a signal is output. 56 is the rail 6A
This is a second position detector having a light-transmitting sensor that operates so that a light-shielding plate 57 provided on the brake arm 42 passes when the kish 43 is about to be gripped. The second position detector 56 detects the position immediately before the electromagnet 45 is demagnetized, the brake arm 42 is rotated by the spring pressure of the spring 47 and the brake 43 is gripped by the rail 6A, Output a signal. FIG. 1B is an explanatory view showing another mode of attaching the second position detector. In the drawing, the same reference numerals as those in FIG. 1 indicate the same or corresponding parts. In this example, the second position detector 56A is provided on the electromagnet 45. The second position detector 56A is a light-transmitting sensor that operates so that the shielding plate 57A provided on the movable piece 44 allows light to pass when the rail 6A is at a position just before gripping the brake 43. And the position immediately before the brake 43 is gripped by the rail 6A is indirectly detected by the gap length between the electromagnet 45 and the movable piece 44.

Here, a brake control circuit for controlling the brake device 40 shown in FIG. 1A will be described with reference to FIG. In the figure, reference numeral 62 denotes an electromagnet current command generator for generating a current command Icom to be supplied 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 and generates a predetermined current command Icom. Reference numeral 63 compares a current command Icom with a feedback current Ifb from a DCCT (DC current transformer) 61 for detecting a current flowing through the brake coil 46, outputs an on / off signal to a base amplifier 64, and outputs a transistor 65 This is a comparator for controlling the electric current of the power supply. FIG. 2B shows a current control method of the comparator 63. The comparator 63 generates a signal for turning off the transistor 65 (OUT output = L) when Icom ≧ Ifb, and generates a signal for turning on the transistor 65 (OUT output = H) when Icom <Ifb. . Reference numeral 21 denotes a contactor contact that interrupts the current with a mechanical contact when an abnormality occurs. Thus, the brake control circuit 63A operates the brake
The current flowing through the coil 46 is controlled.

FIG. 3 shows that the brake control circuit 63A
FIG. 4 is a timing chart for silencing control when the key is released, that is, when the electromagnet 45 is excited. FIG. 4 is a time chart when the brake is activated, that is, the electromagnet 45 is demagnetized and the brake 43 switches the rail 6A. Timing chart for silence control when grasping
It is. 3 and 4, S10 indicates the operation state of the electromagnet excitation signal output from the elevator control device (not shown) to the brake control circuit 63A when the elevator starts and stops. S11 indicates the operation state of the output signal of the first position detector 54, and S12 indicates the operation state of the output signal of the second position detector 56. S13 indicates the operation state of the current command Icom output by the electromagnet current command generator 62, and S14 indicates the operation of the brake coil 4 according to the current command Icom.
6 shows a change in the exciting current flowing through the reference numeral 6. S15 is an electromagnet 45
5 shows a change in the gap between the movable piece 44 and the movable piece 44.

Next, the brake device 40 shown in FIG.
The operation of the brake control circuit 63A shown in FIG. 2A and FIG. 2A will be described with reference to FIGS. In FIG. 3, at time t1, an electromagnet excitation signal, which is an ON signal shown in S10, is output to the brake control circuit 63A to release the brake from the elevator control device, and the brake control circuit 63A At the same time as closing the contact 21, 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. When the exciting current exceeds a predetermined value, the electromagnet 45
When the attraction force overcomes the spring pressure, as shown in S15, the movable piece 44 starts moving at time t2, and immediately before contacting the electromagnet 45 at time t2, the first position is detected at time t3 as shown in S11. Unit 54 is a current command generator 62 for an electromagnet.
Output the signal. The electromagnet current command generator 62 is S
13, the current command Icom is set to zero, and the exciting current is reduced as shown in S14. The attraction force decreases with the decrease in the exciting current, and the movable piece 44 is set to the time t3 shown in S15.
Stop or decelerate for a moment while leaving the gap length g1 as in the interval t5. Then, at time t4 after a predetermined time has elapsed from time t3, the current command generator for electromagnet 62 again increases the current command to Icom1 as shown in S13. Therefore, the exciting current increases again as shown in S14, and the movable piece 44 starts to move again in the period from time t5 to t6 shown in S15. Then, it moves until the gap length g becomes zero. In this case, since the gap length g1 is very short as compared with 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, so that the collision at the time of suction is performed. The sound becomes very quiet. After the suction is completed, as shown in S13, the current command generator 6 for electromagnets is used.
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 brake coil 46 during holding.

In FIG. 4, when the elevator arrives at a predetermined floor, the brake control circuit 63A is operated at time t8 to activate the brake from the elevator control device.
Then, an electromagnet excitation signal which is an off signal shown in S10 is output. The output of the OFF signal causes the electromagnet current command generator 62 to set 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 starts to separate from the electromagnet 45, and when the gap length g1 is reached, the first position detector 54 is turned off. Further, immediately before the brake 43 rotates and the brake 43 grips the rail 6A with the movement of the movable piece 44,
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 starts up the current command again as Icom3, and returns to S1.
As shown in FIG. 4, the exciting current rises, and the electromagnet 45 generates an attractive force. Therefore, the movable piece 44 and the brake
The timer 42 temporarily stops or decelerates at time t11 as shown in S15. After a predetermined time has elapsed, 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
4 and brake 42 are at time t as shown in S15.
Start moving at 13 and brake 43 is on rail 6A
Grab. At this time, since the speed of the brake 43 is very low, the brake 43 is moved to the rail 6A.
The impact sound generated by colliding with the vehicle becomes very small. Also,
After a predetermined time elapses after the brake operation, the contact 21 is opened. After the current is controlled to be zero by the transistor 65 in this way, by opening the circuit with the mechanical contact 21, safety is enhanced and the life of the contact is extended. In order to increase the command followability of the current supplied to the brake coil 46 by performing the above-described control, the electric time constant of the electromagnet 45 must be designed to be sufficiently smaller than the operation time of the movable piece 44. It 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, 102
Is a RAM for storing data. 103 is the CPU 10
A D / A converter 104 for generating a current command Icomn by a command of 0, and a timer 104 for counting time. 10
Reference numeral 5 denotes an input from the first position detector 54, the second position detector 56, or a brake excitation signal input from another linear motor driving inverter, and a linear motor driving. It is an input / output interface for outputting a signal indicating that a brake operation is being performed to the inverter, and for outputting an ON / OFF output signal for a contactor that opens and closes the contact 21.

Next, the operation of the CPU 100 as the central processing unit will be described with reference to FIG. The CPU 100 executes a process T1
If the excitation signal is ON, the rising of the excitation signal is confirmed in step T2. If the excitation signal is rising, the contact 21 is closed in step T3, and a 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 proceeds to step T
In step 5, when the first position detector 54 detects a predetermined position and outputs a signal, 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. When it is confirmed that a predetermined time has elapsed in step T8, the D / A converter 10 is checked in step T9.
The timer is operated in step T10 at the same time as setting the current command of Icom1 to Icom1. When it is confirmed in step T11 that the time required for the electromagnet 45 to complete the suction of the movable piece 44 has elapsed, the D / A converter is converted in step T12. The current command of the data 103 is controlled to Icom2.

If the excitation signal is off in step T1, the CPU 100 checks the fall of the excitation signal in step T13, and if it falls, in step T14, the current command Icom of the D / A converter 103 is checked. = 0 and the electromagnet 45
When the second position detector 56 detects a predetermined position just before the brakes 43 grips the rail 6A and outputs a signal in step T15, the D / A converter 10 in step T16.
In step T17, the timer is operated at the same time as setting the current command of Icom3 to Icom3. When it is confirmed that a predetermined time has elapsed in step T18, the current command is set to Icom3 = 0 in step T19.
And 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 will be described in which the influence of the operation delay of the brake device due to the residual magnetic flux of the electromagnet is reduced. FIG. 7 is an explanatory diagram of a brake control circuit in which the influence of the operation delay of the brake device is reduced. In FIG. 7, the same reference numerals as those in FIG. 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. Transistor 78 applies a positive voltage to brake coil 46, and transistor 79 applies a negative voltage to brake coil 46. During the process of attracting and releasing the electromagnet, the electromagnet current command generator (not shown) issues a command to the remaining electromagnet. By appropriately adding the magnetic flux to cancel, the brake control circuit 73A reduces the operation delay of the brake device. Reference numerals 74 and 76 denote absorber diodes, and 75 and 77.
Is a resistor for an absorber.

Here, the brake control circuit 7 shown in FIG.
The operation when the electromagnet is excited (when the brake is opened) and when the electromagnet is opened (when the brake is operated) will be described with reference to a timing chart shown in FIG. In the figure, S20 indicates the operation state of the electromagnet excitation signal output from the elevator control device (not shown) to the brake control circuit 73A when the elevator starts and stops. S21 indicates the operation state of the output signal of the first position detector 54, and S22 indicates the operation state of the second position detector 5.
6 shows an operation state of the output signal of FIG. S23 indicates the operation state of the current command Icom output from the electromagnet current command generator, and S24 indicates the operation of the brake coil 4 according to the current command Icom.
6 shows a change in the exciting current flowing through the reference numeral 6. S25 is an electromagnet 45
5 shows a change in the gap between the movable piece 44 and the movable piece 44.

Next, the brake control circuit 73A shown in FIG.
8A and 8B show the operation of the brake device 40 shown in FIG.
This will be described below. In the figure, at time t1, an electromagnet excitation signal, which is an ON signal shown in S20, is output to a brake control circuit 73A to release the brake from the elevator control device, and the contact 21 is closed. The electromagnet current command generator 62 outputs the current command shown in S23 to Icom.
The transistor 78 is controlled to increase the current so that the exciting current shown in S24 matches 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 contacting the electromagnet 45 at S21. At time t3, the first position detector 54 generates an output signal at time t3, 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. The negative exciting current is S24
As shown in (2), when the current is supplied, 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 reduced.
Next, the electromagnet current command generator 62 outputs the current command Icom4
When the predetermined time elapses after the command, the transistor 79 is turned off, and at the same time, the transistor 78 is controlled to control the electromagnet 45
Is attracted to the movable piece 44. Thereafter, the current command is set to Icom2. By controlling the brake control circuit 73A, the operation time when the brake device 40 is opened can be shortened, and the movable piece 4 can be moved.
It is possible to reduce the collision sound at the time of contact collision between the electromagnet 4 and the electromagnet 45.

At the time of operation of the brake device 40, the electromagnet excitation signal which is an OFF signal shown in S20 is sent to the brake control circuit 73A in order to operate the brake from the elevator control device at time t8. When the current command generator 62 for the electromagnet commands the current command Icom5 in the opposite direction to the current command Icom2 as shown in S23, the transistor 78 is turned off and simultaneously the transistor 79 is controlled to control the residual magnetic flux as shown in S24. , That is, a negative exciting current is applied, the residual magnetic flux is rapidly demagnetized, and the movable piece 44 rapidly separates from the electromagnet 45 at time t9. By performing such control, the time from time t8 to t9 is reduced. When the movable piece 44 starts to separate from the electromagnet 45 at the time t9 and reaches the gap length g1, 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 grasps the rail 6A, the second position detector 56 is turned on at time t10 as shown in S22, and the current for the electromagnet is displayed as shown in S23. When the command generator 62 commands the current command Icom3 in the direction opposite to the current command Icom5, the command generator 62 turns off the transistor 79 and controls the transistor 78 at the same time, and as shown in S24, the exciting current in the same direction as the current command Icom2 rises and the electromagnet 45 Since a suction force is generated, the movable piece 44 and the brake arm 42 are temporarily stopped or decelerated at time t11 as shown in S25. After a lapse of a predetermined time, the current command Icom3 is set to zero at time t12 as shown in S23.
Due to the spring pressure of 7, the movable piece 44 and the brake beam 42 start moving at time t13 as shown in S15, and the
Kish-43 grabs rail 6A. Brake control circuit 7
By controlling the 3A, the operating time during the operation of the brake device 40 is reduced, and at the same time, the brake 43 and the rail 6A are operated.
The impact noise generated between the two can be reduced.

Embodiment 3 Next, a description will be given of an embodiment of the present invention in which a brake coil of an electromagnet is divided into two and each of the brake coils is controlled by a brake control circuit. FIG. 9 is an explanatory view of an electromagnet portion obtained by dividing an iron core of an electromagnet and a brake coil into two parts. 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 for urging the electromagnets 45A and 45B in a direction away from each other. Brake coil 4
6A and 46B are designed to have different electric time constants. Here, the number of turns N, the resistance R, and the current I of the brake coil 46A are set as the number of turns N /
10, resistance R / 10 and current 10I, at steady state,
When the calorific value when the brake coils 46A and 46B are set to the same ampere turn is calculated, the former is R.I2 and the latter is 10R.I2. The reactance at the same permeance P is N2 · P for the former and (N2 · P) / 1 for the latter.
00. 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.

Here, a brake control circuit for controlling a brake device having 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. It is provided on the electromagnet portion in the same manner as that shown in FIG. When the contact 21 is closed, a voltage of + EDC is applied to the brake coil 46A having a large time constant, and a holding current flows through the current limiting resistor 38. The holding current is supplied in an amount necessary for the electromagnets 45A and 45B to maintain the attracted state against the spring 47A. The current controlled by the brake control circuit 83A is supplied to the brake coil 46B having a small time constant. Numeral 82 denotes an electromagnet current command generator for commanding a current command Icom to a comparator 83. The comparator 83 compares the feedback current Ifb of the DC current transformer 71 with the current command Icom and outputs an upper arm transistor. A required ON / OFF signal to the lower arm transistor 79A or 78A is supplied to the upper and lower short circuit prevention circuit 84. The upper and lower short-circuit prevention circuit 84 includes an upper arm transistor 78A and a lower arm transistor 78A.
When the on / off of the transistor 79A is switched, the short circuit of the upper and lower arm transistors is prevented, and when the current command of the electromagnet current command generator 82 is positive, the upper arm is set.
By operating the base amplifier 84A for driving the transistor 78A, the upper arm transistor 78A is controlled to supply a required positive current to the brake coil 46B, and the current command of the electromagnet current command generator 82 is negative. In this case, the base amplifier 84B for driving the lower arm transistor 79A is operated to control the lower arm transistor 79A, and the brake coil 4 is driven.
A required negative current is supplied to 6B.

Next, the electromagnets 4 having different time constants shown in FIG.
FIG. 11 shows a timing chart when the brake control circuit 83A shown in FIG. 10 controls the devices 5A and 45B mounted on the brake device 40 shown in FIG. In the drawing, S30 shows a state of generation of a linear motor lifting / lowering thrust for raising / lowering the balance weight of the elevator.
Indicates a state in which the thrust is generated in the linear motor in accordance with the counterweight and the unbalanced load of the car, and the linear motor stationary thrust is generated to keep the counterweight stationary. S32 indicates the current command of the exciting current supplied to the brake 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. S33 shows the state of the current command output from the electromagnet current command generator 82 for supplying a required exciting current to the brake coil 46B. S34 indicates an equivalent current obtained by combining the exciting currents supplied to the brake coils 46A and 46B, and a combined magnetic flux corresponding to the equivalent current is generated.

Next, the operation of the above-described 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 door of the car is completely closed, the linear motor for driving the elevator is provided with a counterweight and an unbalanced weight of the car. A certain static thrust is t1
Occasionally, as shown in S31. Simultaneously with the generation of the stationary thrust, the brake control circuit 83A generates a command signal for applying a holding current to the brake 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. The holding current applied to the brake coil 46A causes the electromagnet 46
Since there is no suction force for sucking A and 46B, the brake device keeps generating a predetermined braking force. At the same time as the closing of the car door, the electromagnet current command generator 82 closes the contact 21B, and at the same time, issues a current command Icom6 shown in S33 to the comparator 83 to energize the brake coil 46B and the brake coil 46A. The required current required to attract the electromagnets 46A and 46B is supplied by controlling the upper arm transistor 78A in synergy with the magnetic flux generated by the held current. The exciting current shown at time t2 to t3 in S34 is a sum of the holding current and the required current.

By the pre-excitation of the brake coil 46A having a large time constant, the brake coils 46A and 46B
Is a small time constant of the brake coil 46B.
Is equivalent to the time constant of When the first position detector 54 detects the predetermined position immediately before the attraction of both electromagnets at time t3 at the time t3 when the electromagnets 46A and 46B begin to be attracted, the electromagnet current command generator 82 sets the direction opposite to the holding current as shown in S33. A current command Icom7 for supplying the exciting current is supplied to the comparator 83 to turn off the upper arm transistor 78A and at the same time control the lower arm transistor 79A. The electromagnet 4 accelerated by the attractive force by the application of the exciting current in the opposite direction
6A and 46B decelerate or stop rapidly. At a time t4 when a predetermined time has elapsed from the time t3, the electromagnet current command generator 82 commands the comparator 83 to issue a current command Icom8 for supplying an exciting current in the same direction as the holding current, as shown in S33. The upper arm transistor 78A is controlled at the same time as the transistor 79A is turned off, and both electromagnets are reaccelerated and attracted. At the time t5 after the attraction of both electromagnets, the upper arm transistor 78A
Is turned off, the current of the brake coil 46B is set to zero, and only the holding current of the brake coil 46A is set. The elevator control device (not shown) switches the stationary thrust of the linear motor to the vertical thrust at time t5, so that the car can start lifting and lowering while preventing a shock due to opening of the brake device.

At the time of braking of the brake device, the brake control circuit 83A turns off the command signal shown in S32 and turns off the contact 2
1 and cut off the holding current, and at the same time, the current command generator for electromagnet 82 outputs 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, thereby quickly demagnetizing the residual magnetic flux of the electromagnet, thereby accelerating the separation between the electromagnets 46A and 46B. Electromagnets 46A and 46B
When the second position detector 56 detects a predetermined position immediately before the brake 43 grips the rail 6A at time t7 after the separation, the current command generator 82 for electromagnets outputs the current command as shown in S33. Icom10 is commanded to the comparator 83 to turn off the lower arm transistor 79A and at the same time control the upper arm transistor 78A to supply a current in the same direction as the holding current for a predetermined time to reduce the separation speed between the two electromagnets. By turning off the upper arm transistor 78A again at time t8, the brake 43 grasps the rail 6A and generates a braking force. After the braking of the brake device, the contact 21B is opened. By controlling in this manner, the impact sound is suppressed because the speed at which the brake 43 grips the rail 6A is reduced.

Embodiment 4 FIG. An embodiment of another embodiment of the above-described brake device having two brake coils will be described. FIG. 12 is an explanatory diagram of the car and the counterweight in the hoistway and the relationship with the control device that controls them. In the drawing, reference numeral 11 denotes a counterweight for mounting an armature of a linear motor and a brake device for generating a thrust, and a lifting device for raising and lowering the hoistway. Reference numeral 19 denotes a secondary conductor which engages with the armature of the linear motor to generate an eddy current to give a thrust to the armature of the linear motor. The same reference numerals as those shown in FIG. It shows a part. The counterweight 11 is equipped with a brake device having an electromagnet shown in FIG. 9, and the terminals P of the brake coils 46A and 46B shown in FIG.
1, N1, P2 and N2 are connected through a cable 40 to a brake control circuit 83A installed in a control unit 94 of a linear motor elevator installed on the building side.
With such a configuration, the brake coil 46
Even if one of A and 46B fails or one of the conductors of the cable 40 is cut off for some reason, a large current is temporarily supplied to one of the brake coils to open the brake device. Therefore, the reliability of the elevator is improved.

Embodiment 5 An elevator braking device according to one embodiment of the present invention having a plurality of brake devices will be described. FIG. 13 shows a plurality of brake devices installed on the counterweight 11 shown in FIG. 12 and brakes installed on the building side.
It is a connection diagram with a key control device. In the drawing, a counterweight 11 has an armature 17A of a linear motor, a speed detection encoder 91, and a touch roller attached to an encoder shaft for rotating the encoder 91 by friction with a rail. LA 92, and individually the brake coils 46D, 46E,
Four brake devices having 46F and 46G are installed. Each of the brake devices has a first position detector 5 for detecting a predetermined position immediately before the electromagnet sucks the movable piece.
4D, 54E, 54F, 54G and brakes
Second position detector 56 for detecting a predetermined position immediately before grasping
D, 56E, 56F, and 56G are provided.

Numeral 94 denotes a control device for a linear motor elevator installed on the building side, and the armature 17 of the linear motor is provided.
An inverter unit 95 for supplying a variable power supply to A and a brake control circuit 63B for controlling the four brake devices are provided. Brake coils 46D, 46E, 46
F and 46G are connected in parallel by a cable 40A, connected in series on the control unit 94 side of the linear motor elevator, and connected to a brake control circuit 63B via terminals P10 and N13. First position detectors 54D, 54E, 54
F and 54G are connected in parallel by a cable 40A, and a logical sum circuit 96 for calculating the logical sum of the signals of the first position detector on the control unit 94 side of the linear motor elevator, and a second position detector 56D. Similarly, the OR circuits 9E, 56F, and 56G take the OR of the signals of the second position detector.
The signal subjected to the logical sum processing is input to the brake control circuit 63B through 7 to perform the silencing control of the above-described brake device. Here, the reason for using the logical sum of the signals from the position detectors is that there is a variation in each brake device and each position detector attached to each brake device. Is a brake device in which the gap just before the electromagnet attracts the movable piece or immediately before the brake grips the rail is too small to control the deceleration and stop of the movable piece or brake. . In this case, although there is no problem in the normal operation of the brake device, this point is improved in terms of noise reduction, and sufficient noise reduction control is possible. When the control is performed by using the logical sum, a brake device in which the deceleration and the stop control are performed earlier than the predetermined position comes out, but this does not pose a problem for the silencing control.

With this configuration, a plurality of brake devices can be controlled by one brake control circuit 63B. Therefore, it is possible to provide a brake control circuit for each of the brake devices. The cost is lower than that. Also,
By connecting a plurality of 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 is switched on the building side. When a normal brake coil is energized and the brake device is opened, a large current flows for a short time to the armature 17A of the linear motor, and the linear motor moves to the nearest floor with the faulty brake dragged. Passengers can be rescued.

In the above-described embodiment, an example in which the brake device is installed on the counterweight is shown. However, the brake device can be installed on a car. In addition, a sensor using light for the first position detector and the second position detector has been described. However, in addition to a capacitive displacement sensor, a sensor using magnetism or laser beam is used as the position detector. It can be.

[0051]

As described above, according to the present invention, the braking device for the elevator, the brake control means, and the exciting current of the electromagnet for a predetermined time while the electromagnet of the braking device is driving the movable piece. A first operation in which the movable piece is attracted to the electromagnet by increasing after a break or a decrease in current, and the electromagnet energizes the exciting current of the electromagnet for a predetermined time while the movable piece is open, and then cuts off to form a brake member and rail. Is configured to perform any control of the second operation of engaging the electromagnet and the movable piece or reducing the impact force at the time of engaging the braking member and the rail, thereby reducing the braking device. There is an effect that the operation sound at the time of opening or operating can be suppressed.

Further, the brake control means increases or decreases the exciting current of the electromagnet after a predetermined time by inputting a signal from the first position detector and then increases the current to attract the movable piece to the electromagnet. And the second operation of applying the excitation current of the electromagnet for a predetermined time in response to the input of the signal of the second position detector and then shutting off to engage the braking member with the rail. This has the effect of reducing the impact force at the time of attracting the electromagnet and the movable piece or at the time of engaging the braking member with the rail, thereby suppressing the operating noise when the brake device is opened or activated.

Further, the brake control means supplies a first exciting current to the electromagnet while the electromagnet is driving the movable piece, and in response to the input of the signal from the first position detector, the electromagnet reverses the first exciting current. After the second exciting current in the direction is supplied for a predetermined time, the same exciting current as that of the first exciting current is supplied to attract the movable piece to the electromagnet, so that the brake device can be opened in a short time. This has the effect of reducing the impact force when the electromagnet and the movable piece are attracted, and suppressing the operating noise when the brake device is opened.

Further, the brake control means supplies a current in a direction opposite to a holding current of the electromagnet which has attracted and held the movable piece while the electromagnet is opening the movable piece, and then cuts off the current for the required time. The excitation current is cut off after the excitation current in the same direction as the holding current is supplied for a predetermined time by the input of the signal of the second position detector, so that the brake device can be opened in a short time and This has the effect of reducing the impact force at the time of engagement between the brake member and the rail, and suppressing the operating noise during operation of the brake device.

Further, two electromagnet coils having different time constants are provided in the brake device, and the brake control means is configured to control the exciting current of the two electromagnet coils. The impact force at the time of engagement or when the rail is engaged with the braking member is controlled, and there is an effect that the operation sound at the time of opening or operating the brake device can be suppressed.

Further, the brake control means supplies a holding current for holding the movable piece to the electromagnet coil having a larger time constant among the two electromagnet coils having different time constants while the electromagnet is opening the movable piece. After the predetermined time has passed, the current control of the electromagnet coil having the smaller time constant is performed to attract the movable piece, so that the brake device can be opened in a short time and the electromagnet and the movable piece can be attracted. This has the effect of controlling the impact force and suppressing the operating noise when the brake device is operated.

If one of the two electromagnet coils or the elevator cable has a failure,
The key control means is configured to open the brake device by supplying a current necessary for attracting the movable piece to the other electromagnet coil, so that the elevator device cannot be moved up and down due to the brake being applied. It has the effect of preventing.

Further, in the elevator braking apparatus according to the present invention, the brake control means is installed on the building side, and a plurality of brake apparatuses are connected in parallel through the elevator cable, and are connected on the building side. Since it is connected in series with the brake control means, if one of the electromagnet coils or the elevator cable fails, the connection of a plurality of brake devices must be changed on the building side. Since the brake device is configured to be able to operate, opening the normal brake device has an effect of preventing the elevator device from being unable to move up and down due to the brake being continuously applied.

Further, the brake control means includes a plurality of brakes.
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 a logical OR of the input of the signal of each first position detector of the key device; Any one of the second operations of applying an exciting current to each of the electromagnets for a predetermined time and then interrupting them to engage the braking member with the rail, based on the logical sum of the input signals of the respective second position detectors of the keying device. Is controlled so that the electromagnets of the plurality of brake devices and the movable piece are attracted or the braking member and the brake are engaged.
Thus, there is an effect that the impact force at the time of engagement of the brake is reliably reduced, and the operating sound at the time of opening or operating the brake device can be suppressed.

[Brief description of the 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 one embodiment of the present invention.

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

FIG. 4 is a timing chart at the time of a brake operation of a brake control circuit according to an 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 the central processing unit of the electromagnet current command generator according to one embodiment of the present invention.

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

FIG. 8 is a timing chart of a brake control circuit with a reduced operation delay of the brake device according to one embodiment of the present invention;
It is.

FIG. 9 is an explanatory view of an electromagnet portion obtained by dividing an iron core and a brake coil of the electromagnet according to one embodiment of the present invention.

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

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

FIG. 12 is an explanatory diagram of a car and a counterweight in a hoistway according to an embodiment of the present invention, and a relation between a control device for controlling these hoisting and lowering.

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 brake devices.

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 configuration 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 a brake is released in a control circuit of a conventional brake device.

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

[Explanation of symbols]

5 Basket 7, 11, Counterweight 4A, 6A Rail 18, 40 Brake device 23, 43 Brakeh 24, 44 Movable piece 25, 45, 45A, 45B Electromagnet 26, 46, 46A, 46B Brake Key coils 27, 47, 47A Spring 40, 40A cable 54 First position detector 56 Second position detector 63A, 63B, 73A, 83A Brake control circuit 94 Linear motor elevator control device 96, 97 Logic Sum circuit

Continued on the front page F term (reference) 3F002 EA10 GA08 3F301 BA16 BC01 CA02 3F304 AA00 EA24 EA29 3F306 AA12 BA09 EA03 3J058 BA21 CC06 CC77 FA39

Claims (9)

[Claims] 1. A rope type elevator in which a car and a counterweight are connected to each other by a rope and lifted in a hoistway by a hoist, the movable elevator being installed in the hoistway and resisting a spring force. A brake device having an electromagnet for driving the motor, a rail provided on a hoistway along the elevating body of the elevating body, and a braking member for generating a braking force by engaging with the spring force; In an elevator braking device provided with brake control means for controlling an excitation current of an electromagnet, the brake control means interrupts or cuts off the excitation current of the electromagnet for a predetermined time while the electromagnet is driving the movable piece. Then, the first operation of increasing the movable piece and attracting the movable piece to the electromagnet, and the second operation of applying the exciting current of the electromagnet for a predetermined time while the electromagnet is opening the movable piece and cutting off to engage the braking member with the rail. An element for performing any control of the operation. Braking device over data. 2. A brake device comprising: a first position detector for detecting a first position of a movable piece with respect to an electromagnet and outputting a signal to brake control means during the first operation; A second position detector for detecting a second position of the braking member with respect to the rail during operation and outputting a signal to the brake control means, wherein the brake control means comprises a first position detector; The first operation of increasing and then attracting the movable piece to the electromagnet after the excitation current of the electromagnet is interrupted or cut off for a predetermined time by the input of the position detector signal, and the input of the electromagnet by the input of the second position detector signal After the excitation current is supplied for a predetermined time, it is cut off and the brake
2. The elevator braking apparatus according to claim 1, wherein any one of the second operations for engaging the elevator is controlled. 3. The brake control means includes means for applying a first exciting current to the electromagnet while the electromagnet is driving the movable piece, and inverting the first exciting current to the electromagnet by inputting a signal from the first position detector. 3. The braking device for an elevator according to claim 2, wherein an exciting current of the same direction as the first exciting current is applied after the second exciting current in the direction is supplied for a predetermined time to attract the movable piece to the electromagnet. 4. A brake control means for supplying a current in a direction opposite to a holding current of the electromagnet holding and holding the movable iron core for a required time while the electromagnet opens the movable piece, and thereafter supplying the current in the reverse direction. 3. The method according to claim 2, wherein the excitation current is interrupted for a predetermined time, and an excitation current in the same direction as the holding current is supplied for a predetermined time by inputting a signal from the second position detector. Elevator braking system. 5. A rope elevator in which a car and a counterweight are connected to each other by a rope and lifted in a hoistway by a hoist, wherein the movable piece is installed in the hoistway and resists a spring force. A brake device having an electromagnet for attracting air, a rail provided on a hoistway along the lifting / lowering direction of the lifting / lowering body, and a braking member for generating a braking force by engaging with the spring force. In an elevator braking device provided with brake control means for controlling an exciting current of an electromagnet, the braking device has two electromagnet coils having different time constants and a brake for controlling the exciting current of the two electromagnet coils. A braking device for an elevator, comprising: a key control means. 6. The brake control means supplies a holding current for holding the movable piece to the electromagnet coil having a larger time constant among the two electromagnet coils having different time constants while the electromagnet is opening the movable piece. 6. The braking device for an elevator according to claim 5, wherein after a predetermined time has elapsed, the current of the electromagnet coil having the smaller time constant is controlled to suck the movable piece. 7. The two electromagnetic coils having different time constants of the brake device installed on the elevating body are connected to the brake control means installed on the building side through an elevator cable. If there is a failure in either the electromagnet coil or the elevator cable, the brake control means supplies a current necessary for attracting the movable piece to the other electromagnet coil and supplies the brake device. 6. The elevator braking device according to claim 5, wherein the brake is released. 8. A rope elevator in which a car and a counterweight are connected to each other by a rope and lifted in a hoistway by a hoist, wherein the movable piece is installed in the hoistway and resists a spring force. A plurality of brake devices each having an electromagnet for attracting air, a rail provided on a hoistway along the lifting / lowering direction of the lifting / lowering body, and a braking member that generates a braking force by engaging with the spring force. A braking control means for controlling the exciting current of the electromagnet, wherein the braking control means is installed on the building side, and the electromagnet coils of the plurality of braking devices are lifted by an elevator. An elevator braking device, which is connected in parallel through cables and connected in series with the brake control means on the building side. 9. A plurality of brake devices each for detecting a 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 for detecting a second position of the braking member with respect to the rail and outputting a signal to brake control means while the movable piece is opened by the electromagnet. -Key control means, the first operation to cut off or reduce the exciting current of each electromagnet for a predetermined time by the logical sum of the input of the signal of each first position detector, then increase and attract the movable iron core to the electromagnet, According to the logical sum of the input of the signals of the respective second position detectors, an exciting current is supplied to each electromagnet for a predetermined time, and thereafter, any one of the second operations for interrupting and engaging the brake member and the rail is performed. 9. An elevator braking apparatus according to claim 8, wherein: