JP5315107B2 - Brake device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brake device for an elevator, a hoisting machine and an elevator device allowing reduction of collision sound when releasing the brake and applying the brake, miniaturization of driving means for performing brake releasing and brake applying operations, a remote control operation for releasing the brake by installing a motor at a remote position and arrangement of the driving motor at a position easy for performing a maintenance inspection. <P>SOLUTION: This brake device 4 includes an electric motor 3, a brake drum 9, a brake piece 10, a brake arm 11, a brake spring 12 and the driving means 17a/17b. The driving means 17a/17b includes a string body 15, a rotary type driving motor 13a/13b, and a driving circuit 16. By driving the string body 15 by the driving motor 13a/13b, the brake arm 11 is driven. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an elevator brake device that applies a braking force by pressing a braking piece against a brake drum with a spring and releases the braking force by being separated from the braking piece brake drum via a string by a drive motor.

  2. Description of the Related Art Conventionally, an elevator brake device that presses a braking piece against a brake drum to apply a braking force and releases the pressing force by a driving unit to release the braking force is well known. In this type of brake device, a braking spring is used for braking and an electromagnet is used for releasing the braking (see, for example, Patent Document 1). In addition, a method has been proposed in which the excitation current of the brake is reduced by controlling the excitation current of the electromagnet (see, for example, Patent Document 2). In addition, a brake release unit that includes a gear mechanism and a servo motor has been proposed (see, for example, Patent Document 3). In addition, a method has been proposed in which a brake is manually released with a cable when the elevator stops abnormally (see, for example, Patent Document 4).

JP 2006-266362 A Japanese Patent Application Laid-Open No. 09-267982 Japanese Patent Laid-Open No. 06-21472 JP 2001-322781 A

  The elevator brake device proposed in Patent Document 1 applies a braking force by pressing the brake drum with a spring force, supplies a current to the coil of the electromagnet, and performs electromagnetic attraction against the spring force. Release the pressure and release the brake.

  Usually, the braking release and braking addition operations are performed by turning on and off the power supply to the coil of the electromagnet. When current starts to flow through the electromagnetic coil due to energization (braking release operation), the gap between the electromagnet and the movable piece is gradually narrowed from the start of supplying the coil current. At this time, since the magnetic flux generated by the coil current increases in inverse proportion to the square of the gap, the gap suddenly narrows in the middle of the approach of the movable piece to the electromagnet, and the electromagnet and the movable piece come into contact instantaneously.

  If the brake release state is maintained and then the current value is made zero by turning off the power supply (braking addition operation), the coil current decreases with a predetermined time constant, so the gap between the electromagnet and the movable piece begins to open slowly. Contrary to when the brake is released, the gap is suddenly opened in the middle of the separation of the movable piece from the electromagnet, so that the braking piece is suddenly pressed against the brake drum by this sudden action.

  As described above, when the braking piece suddenly operates at the time of releasing the brake and applying the braking, the collision noise of the movable piece to the electromagnet side and the collision noise of the braking piece to the brake drum increase, which is inconvenient for passengers in the car. It gives a pleasant feeling.

  Electromagnets generally have a negative relationship between the air gap and the electromagnetic attractive force, and it is difficult to control the electromagnetic attractive force by the exciting current, that is, it is difficult to control the air gap by the exciting current. Therefore, as described above, the collision sound when releasing the brake and applying the brake is large, and it is difficult to control and reduce the collision sound.

  In particular, because the machine room at the top of the hoistway has been omitted and the hoisting machine itself has been installed in the hoistway, the brake collision sound has become more prominent as car interior noise. . Therefore, in order to suppress such a collision noise at the time of brake release and addition, in conventional coil current control (see FIG. 2 of Patent Document 2), when a brake release command is first received, the command value of the coil current is set. A ramp-like (gradual increase pattern) current command is output, and the suction force acting on the movable piece is gradually increased by gradually increasing the coil current. However, as described above, it is difficult to control the air gap with the excitation current, and it is difficult to control the movement of the fast movable piece that requires a brake opening / closing operation of about 1 second or less, and the effect of sufficiently reducing the collision noise is obtained. There is a problem that can not be.

  In addition, when releasing the brake, to reduce the size of the electromagnet by using a reduction mechanism such as an insulator in order to produce a force that counteracts the braking spring force, the reduction mechanism with a large reduction ratio is generally used because the effective operating stroke of the electromagnet is small. Therefore, there is a problem that the electromagnet, that is, the driving means cannot be further reduced in size. Furthermore, actuators and electromagnets are relatively large, and when these are used, there is also a problem that the apparatus itself becomes large and it is difficult to downsize the apparatus.

  Further, Patent Document 3 is configured integrally with a gear mechanism and a servo motor as a brake release means, and it is impossible to remotely operate the brake release by installing the motor at a remote position, and a servo motor which is a drive motor Is provided integrally with the hoisting machine, so that there is a problem that it cannot be arranged at a position where maintenance inspection is easy in the hoistway.

  Further, the proposal of Patent Document 4 is to manually release the braking force using a cable, and does not release the braking force by controlling the rotational displacement by a driving means such as a motor.

  An object of the present invention is to provide an elevator brake device, a hoisting machine, and an elevator device that can reduce collision noise when braking is released and braking is applied. Another object of the present invention is to propose an elevator brake device, a hoisting machine, and an elevator device that can reduce the size of the driving means for releasing and applying braking. For other purposes, it is possible to remotely operate the brake release by installing the motor used in the elevator brake device at a remote position, and it is also possible to arrange the drive motor at a position where maintenance inspection is easy The elevator brake device, hoisting machine, and elevator device are proposed.

In order to achieve the above object, an elevator brake device according to the present invention includes an electric motor, a brake drum provided in the electric motor, a brake piece disposed opposite to the brake drum, and a brake that supports the brake piece. A hoisting device comprising: an arm; a brake spring that presses the brake piece against the brake drum; and a drive unit that releases the brake by separating the brake piece from the brake drum against an urging force of the brake spring. In the elevator brake device of the machine, the drive means includes a string-like body, a rotary drive motor, and a drive circuit that drives and controls the drive motor, and one end side of the string-like body is connected to the braking arm or the base of the hoisting machine or attached to a fixed portion of the hoistway, and driven by the drive motor via a pulley deflects the other end of the string-like body so as to drive the braking arm It is characterized in.

  According to the present invention, it is possible to reduce a collision sound when braking is released and braking is applied. Also, it is possible to reduce the size of the driving means for performing the brake release and brake addition operations, or to remotely operate the brake release, and to take a form that allows the drive motor to be arranged at a position where maintenance and inspection can be easily performed. it can.

BRIEF DESCRIPTION OF THE DRAWINGS It is schematic structure explanatory drawing of a hoisting machine provided with the external expansion brake apparatus for elevators which is Example 1 of this invention, and an elevator apparatus. It is a front view of the elevator hoistway which installed the hoisting machine of FIG. It is a side view of the elevator hoistway which installed the hoisting machine in FIG. It is a drive circuit diagram of the drive motor of the drive means of FIG. It is a figure which shows the time change of operation | movement of the drive motor of FIG. It is a principal part enlarged view which shows the example which provided the drive motor in the fixing | fixed part of the hoistway with the brake device of FIG. FIG. 2 is a view corresponding to FIG. 1 of a hoisting machine and an elevator apparatus including an inner expansion brake device. It is a principal part enlarged view for demonstrating the example which changed the installation position of the drive motor using the deflecting pulley with the external expansion brake apparatus of FIG. FIG. 9 is a view corresponding to FIG. 8 in the internal expansion brake device. FIG. 8 is an enlarged view of a main part of the outer expansion brake of FIG. 1 and a brake device on one side of the inner expansion brake of FIG. It is a principal part enlarged view of the brake device for elevators of Example 2 of this invention. It is the principal part enlarged view which showed the other form of Example 2 of this invention. It is a principal part enlarged view of the brake device for elevators of Example 3 of this invention. It is the principal part enlarged view which showed the other form of Example 3 of this invention. It is the principal part enlarged view which showed the further another form of Example 3 of this invention. It is a principal part enlarged view of the brake device for elevators of Example 4 of this invention. It is the principal part enlarged view which showed the other form of Example 4 of this invention. It is the principal part enlarged view which showed the further another form of Example 4 of this invention. It is a principal part enlarged view of the brake device for elevators of Example 5 of this invention. It is the principal part enlarged view which showed the other form of Example 5 of this invention.

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

  FIG. 1 is a schematic diagram illustrating the configuration of a hoisting machine and an elevator apparatus provided with an elevator externally expanding brake device according to the first embodiment, FIG. 2 is a front view of an elevator hoistway in which the hoisting machine of FIG. 1 is installed, and FIG. FIG. 3 is a side view of an elevator hoistway in which the hoisting machine in FIG. 2 is installed.

  1 to 3, the hoisting machine 1 is provided with an electric motor 3 and a pair of brake devices 4 on a base 2. The drive sheave 5 is provided on a rotating body of the electric motor 3, and a car 7 is suspended on one side of a main rope 6 wound around the drive sheave 5, and a counterweight 8 is suspended on the other side. The driving sheave 5 is driven by the electric motor 3 so that the car 7 and the counterweight 8 are moved up and down. A brake drum 9 as a body to be braked is provided on the rotating body of the electric motor 3. A pair of braking pieces 10 abut on the braking surface 9 a on the outer peripheral surface of the brake drum 9. The pair of braking arms 11 includes a braking piece 10 in the intermediate portion 11c and is rotatably supported with the one end portion 11a as a fulcrum. The braking spring 12 is disposed at the other end portion 11b of the braking arm 11 so that the braking piece 10 applies a pressing force to the braking surface 9a. That is, this embodiment is an externally extended brake that presses the outer peripheral surface of the brake drum 9 to apply a brake and expands the brake piece 10 outward to release the brake. The brake piece 10, the brake arm 11, and the brake spring 12 are connected together. Two sets of brake devices 4 that function independently as a set of braking addition mechanisms are provided on the left and right of the brake drum 9.

  The drive motors 13a and 13b provided on the base 2 near the other end 11b of the brake arm 11 are rotationally controlled by a current, pulse, or frequency such as a DC motor, a stepping motor, or a synchronous motor provided with a drive pulley 14 on a rotating body. It is a rotary drive motor that can be used. The string-like body 15 is composed of, for example, a small-diameter wire rope, a chain, etc. One end side 15a of the string-like body 15 is coupled to the other end portion 11b of the braking arm 11, and the other end of the string-like body 15 The side 15b is wound and rewinded by the drive pulley 14 of the drive motors 13a and 13b driven by the drive circuit 16. That is, the string-like body 15 is driven by the drive motors 13a and 13b, the braking arm 11 is driven, and the pressing force of the braking piece 10 by the braking spring 12 is released and added. The drive means 17a and 17b are constituted by drive motors 13a and 13b, a string-like body 15, and a drive circuit 16. The displacement detection means 18 is composed of, for example, a micro switch, and detects the displacement of the brake piece 10 or the brake arm 11 to detect whether the brake is released or the brake is applied.

  That is, in this embodiment, as shown in FIG. 1, the brake spring 12, the brake arm 11, and the brake piece 10 are used as a brake addition mechanism, and the drive motor 13a as the brake release mechanism and the drive means 17a of the string-like body 15 are used. A pair of independently functioning brake devices 4 composed of: a brake spring 12, a brake arm 11 and a brake piece 10 as a brake addition mechanism on the right side of the brake drum 9, and a drive motor as a brake release mechanism On the left side of the brake drum 9, a pair of independently functioning brake devices 4 constituted by 13 b and the driving means 17 b of the string-like body 15 are provided.

  2 and 3, the hoist 1 is installed in the elevator hoistway 19. For example, the hoist 1 is installed at the lower part of the hoistway 19, the main rope 6 is wound around the drive sheave 5, and the pulleys 19 a, 19 b, provided at the upper part of the car 7, the counterweight 8 and the hoistway 19, 19c etc. are wound and both ends are fixed to the hoistway 19 upper part.

  FIG. 4 is a drive circuit diagram of the drive motor of the drive means of FIG. 1, and FIG. 5 is a diagram showing the time change of the operation of the drive motor of FIG. As shown in FIGS. 4 and 5, the drive circuit 16 controls the current flowing through the drive motors 13 a and 13 b to control the rotational displacement of the drive pulley 14. The DC control power source 20 of the drive circuit 16 is composed of, for example, a DC power source and a switching element, and is connected to the drive motors 13a and 13b via a contact 21 of an electromagnetic contactor that connects and disconnects the output of the control power source 20. Has been. A diode 22 and a resistor 23 connected in series are connected in parallel with the drive motors 13a and 13b, and when the contact 21 is opened, the reflux current from the drive motors 13a and 13b is consumed and protected.

  The rotational displacement command means 24 commands rotational displacement of the drive motors 13a and 13b, and the rotation detection means 25a and 25b detect rotational displacement of the drive motors 13a and 13b. The command 26 of the rotation displacement command means 24 and the detection values 25c and 25d of the rotation detection means 25a and 25b are input to the control power supply 20, and the control power supply 20 receives the command value 26 of the rotation displacement command means 24 and the rotation detection means 25a and 25b. Output is performed so that the detected values 25c and 25d coincide with each other, and the rotational displacement 27 of the drive motors 13a and 13b is controlled.

  Based on FIG. 5, the operation from the release of braking to the addition of braking in this embodiment, that is, (A) rotational displacement command 26 of the drive motor from time T1 to time T4, (B) rotational displacement 27 of the drive motor ( C) The operation of the contact 21 will be described.

  The contact 21 of the power supply electromagnetic contactor is connected at time T1, and the contact 21 is cut off at time T4. The brake release operation is rotationally displaced by a displacement amount indicated by the rotational displacement 27 in the direction in which the drive pulleys 14 of the drive motors 13a and 13b wind the string-like body 15 in response to a command 26 of the rotational displacement command means 24 during a period from T1 to T2. Release the brake. In this figure, the rotational displacement command 26 is shown so as to increase in a ramp shape. However, when adjusting the braking release operation fast or slow, a curvilinear command value such as exponential function or quadratic function is given. . A period T2 to T3 is a brake release holding period, and a command value 26 of the rotational displacement command means 24 exceeding the predetermined rotational displacement 27a of the braking piece 10 or the braking arm 11 is given in advance, and the rotational displacement 27 of the drive motors 13a and 13b is kept constant. Hold on. Alternatively, the displacement detecting means 18 of FIG. 1 detects that the predetermined rotational displacement 27a of the braking piece 10 or the braking arm 11 has been exceeded, and gives the command value 26 of the rotational displacement command means 24 to rotate the drive motors 13a and 13b. The displacement 27 is kept constant.

  The braking addition operation is a period from T3 to T4, and the rotational displacement command means 24 rotationally displaces 27 the drive pulleys 14 of the drive motors 13a and 13b in the direction to rewind the string-like body 15. In this figure, the rotational displacement command 26 is shown to decrease in a ramp shape, but when adjusting the operation when braking is applied, such as fast or slow, a curvilinear command value such as exponential function or quadratic function is given. It is done.

  In the case of an emergency, the contact 21 is opened, the return current from the drive motors 13a and 13b disappears with the circuit time constant of the drive motors 13a and 13b, the diode 22 and the resistor 23, and the braking piece 10 is driven by the force of the brake spring 12. Is pressed against the brake drum 9, the drive motors 13a and 13b rotate in the reverse direction, and the rotational displacement 27 returns.

  When individually controlling the drive operations of the drive motors 13a and 13b, for example, as shown in (A) Rotation displacement command in FIG. 5, the solid line rotation displacement command 26 is the drive motor 13a, and the broken line rotation displacement command is A rotational displacement command 28 is given and driven so as to correspond to the drive motor 13 b, and a rotational displacement 29 is obtained. Further, although not shown in the figure, the command start T1 and end T4 of the rotational displacement command means 24 of the drive motors 13a and 13b can be shifted and driven.

  1 shows the case where the drive motors 13a, 13b of the drive means 17a, 17b are installed on the base 2 of the fixed part of the hoisting machine 1, but FIG. Shows the case. FIG. 6 is an enlarged view of an essential part showing an example in which a drive motor is provided in a fixed part of a hoistway in the brake device of FIG. In other words, it is effective when the drive motors 13a and 13b are not provided on the base 2 or when the drive motors 13a and 13b are arranged at positions where maintenance and inspection are easy. Can be operated.

  FIG. 7 is a view corresponding to FIG. 1 of a hoisting machine and an elevator apparatus provided with an internal expansion brake device. The brake device 4 shown in the figure is an inner expansion brake device, and an inner peripheral surface of the brake drum 9 is a braking surface 9a. It is the same as that of the external expansion brake device 4 in FIG. A pair of braking pieces 10 abut against the braking surface 9 a of the brake drum 9. This braking piece 10 is provided in the intermediate part 11c of a pair of braking arms 11, and the one end part 11a is rotatably supported. A braking spring 12 is disposed at the other end 11b of the braking arm 11, and the braking piece 10 applies a pressing force to the braking surface 9a.

  One end side 15a of the string-like body 15 is coupled to the other end portion 11b of the brake arm 11, and the string is formed by a drive pulley 14 provided on a rotating body of the drive motors 13a and 13b of the drive means 17a and 17b installed on the base 2. The other end side 15b of the shaped body 15 is wound and driven to rewind. As a result, the pressing force of the brake spring 12 is released and applied. The drive motors 13a and 13b are driven by a drive circuit 16. This configuration is effective when the external expansion brake method cannot be adopted.

  FIG. 8 is an enlarged view of a main part for explaining an example in which the installation position of the drive motor is changed using a deflecting pulley in the externally expanding brake device of FIG. In the same figure, in the externally expanding brake device 4 of FIG. 1, a deflecting pulley 32 is provided on the installation side of the drive motors 13a and 13b, one end side 15a of the string-like body 15 is coupled to the other end portion 11b of the braking arm 11, The cord 15 is wound around the baffle pulley 32, and the other end side 15b of the string-like body 15 is wound up by the drive motors 13a and 13b provided on the base 2 inside the pair of brake arms 11, and is driven to rewind. This is effective when the drive motors 13a and 13b cannot be disposed outside the pair of braking arms 11.

  FIG. 9 is a view corresponding to FIG. 8 in the internal expansion brake device. As shown in the figure, in the internal expansion brake device 4, a deflecting pulley 32 is provided on the installation side of the drive motors 13a, 13b, and one end side 15a of the string-like body 15 is coupled to the other end portion 11b of the braking arm 11 to deflect it. It winds around the pulley 32, winds up the other end side 15b of this string-like body 15 with the drive motors 13a and 13b provided in the base 2 outside the pair of brake arms 11, and drives to rewind. This is effective when the drive motors 13a and 13b cannot be arranged inside the pair of braking arms 11.

  FIG. 10 is an enlarged view of a main part in which the brake device on one side of the outer expansion brake of FIG. 1 and the inner expansion brake of FIG. As shown in the figure, the pulleys 32 and 33 are installed on the base 2 and the braking arm 11 of the hoisting machine 1, and one end side 15 a of the string-like body 15 is coupled to the other end of the braking arm 11 to deflect it. The pulleys 32 and 33 are wound, and the other end side 15b of the string-like body 15 is wound up by a drive motor 13a (13b) provided on the base 2 and driven to rewind. That is, the string-like body 15 is wound around the baffle pulleys 32 and 33 to form a 1/3 speed reduction mechanism, and the braking arm 11 can be driven at a reduced speed by the drive motor 13a (13b). The size of 13a (13b) can be reduced and the rotational displacement can be increased.

  Similarly to the case shown in FIG. 6, in the examples shown in FIGS. 7 to 10, the drive motors 13 a and 13 b are not the base 2 of the fixing part of the hoist 1, but the fixing part of the hoistway 19. The string-like body 15 is deflected and wound by pulleys 32, 33, etc., and the drive motors 13a, 13b can be placed at positions where maintenance and inspection are easy to operate remotely.

  In this embodiment, the string-like body 15 is driven by the drive motors 13a and 13b capable of rotation control to drive the braking arm 11, so that the displacement of the braking arm 11 and the braking piece 10 is different from the driving by the conventional electromagnet. Since the control can be performed, it is possible to reduce the collision sound when the brake is released and the collision sound between the brake piece 10 and the brake drum 9 when the brake is applied. Further, as shown in FIGS. 1 and 6 to 9, the lever ratio according to the coupling position of the braking piece 10 of the braking arm 11 and the string-like body 15 is adjusted, and the baffle pulleys 32, 33 and the string-like body 15 are adjusted. Thus, it is possible to form a speed reduction mechanism, so that a high speed reduction is possible, the driving torque is reduced, and the driving motors of the driving means 17a and 17b can be reduced in size. In addition, the drive motors 13a and 13b for driving the braking arm 11 are installed not at the base 2 of the hoisting machine 1 but at a remote position so that the brake can be remotely released, and at the fixed part of the hoistway that can be reached. If installed, it can also be installed at the fixed part of the hoistway where maintenance and inspection are easy to perform, so the effect of facilitating maintenance and inspection of the drive motor can be obtained.

  Next, Example 2 will be described with reference to FIGS. FIG. 11 is an enlarged view of a main portion of an elevator brake device according to a second embodiment of the present invention, and FIG. 12 is an enlarged view of a main portion showing another form of the second embodiment of the present invention. Is shown together. This embodiment differs from FIG. 1 and FIGS. 6 to 10 of the first embodiment in that the connection on both ends of the string-like body is reversed and one end of the string-like body is connected to the fixing portion of the hoisting machine 1. The other end side of the string-like body is driven by a drive motor provided on the braking arm.

  That is, in FIG. 11, one end side 15 a of the string-like body 15 is coupled to the base 2 that is a fixing portion of the hoisting machine 1, and the other end side 15 b of the string-like body 15 is provided on the braking arm 11. , 13b.

  In FIG. 12, one end side 15 a of the string-like body 15 is coupled to the base 2 that is a fixing portion of the hoisting machine 1, and the other of the string-like body 15 is connected via the brake arm 11 and the deflecting pulley provided on the base 2. The end side 15b is driven by a drive motor 13a (13b) provided on the braking arm 11, and the string-like body 15 and the baffle pulley constitute a speed reduction mechanism to form a 1/3 speed reduction.

  Note that the one end side 15 a of the string-like body 15 in FIG. 11, the one end side 15 a of the string-like body 15 in FIG. 12, and the baffle pulley may be provided in the fixing portion of the hoistway 19.

  Even when configured as in the present embodiment, the same effects as in the first embodiment can be obtained.

  Next, Embodiment 3 will be described with reference to FIGS. FIG. 13 is an enlarged view of a main portion of an elevator brake device according to a third embodiment of the present invention, FIG. 14 is an enlarged view of a main portion showing another form of the third embodiment of the present invention, and FIG. 15 is a third embodiment of the present invention. It is the principal part enlarged view which showed other form of this. The third embodiment differs from the second embodiment shown in FIGS. 11 and 12 in that the one end side of the string-like body is coupled to the braking arm, and the baffle pulley provided at the fixing portion of the hoist 1 or the fixing portion of the hoistway is provided. Then, the other end side of the string-like body is driven by a drive motor provided on the braking arm.

  That is, in FIG. 13, one end side 15 a of the string-like body 15 is coupled to the braking arm 11, and the other end side of the string-like body 15 via the baffle pulley 32 provided in the fixing portion of the base 2 or the hoistway 19. 15b is driven by a drive motor 13a (13b) provided on the braking arm 11, and the string-like body 15 and the deflecting pulley 32 constitute a speed reduction mechanism to form a 1/2 speed reduction.

  In FIG. 14, as in FIG. 13, one end side 15 a of the string-like body 15 is coupled to the braking arm 11, and is provided on the deflection pulleys 32 a and 32 b and the braking arm 11 provided on the base 2 or the fixed portion of the hoistway 19. The other end side 15b of the string-like body 15 is driven by the drive motor 13a (13b) provided on the braking arm 11 via the deflection pulley 33, and the deceleration mechanism is operated by the string-like body 15 and the deflection pulleys 32a, 32b, 33. Consists of a 1/4 speed reduction.

  In FIG. 15, in FIG. 14, two deflecting pulleys 32 a and 32 b provided on the base 2 or the fixing part of the hoistway 19 are rotatably supported by the bracket 34, and this bracket is fixed to the base 2 or the hoistway 19 fixing part. Is supported by a shaft 35 provided on the rotary shaft.

  In the present embodiment, the same effect as in the first embodiment can be obtained. Further, in the example shown in FIG. 15, since a plurality of baffle pulleys are attached to one bracket, installation work at the site is simplified and installation efficiency is improved. Further, since the bracket can be fixed at one point of the shaft 35, it is possible to obtain an effect that it is possible to attach the bracket even in a place where a plurality of deflecting pulleys cannot be installed.

  Next, a fourth embodiment will be described with reference to FIGS. FIG. 16 is an enlarged view of a main part of an elevator brake device according to a fourth embodiment of the present invention, FIG. 17 is an enlarged view of a main part showing another form of the fourth embodiment of the present invention, and FIG. 18 is a fourth embodiment of the present invention. It is the principal part enlarged view which showed other form of this. The fourth embodiment differs from the third embodiment shown in FIGS. 13 to 15 in that one end side of the string-like body is connected to the fixing portion and the other of the string-like body is connected via a baffle pulley provided on the braking arm. The end side is driven by a drive motor provided at a fixed part of the hoisting machine or a fixed part of the hoistway.

  In FIG. 16, one end side 15 a of the string-like body 15 is coupled to the base 2 that is a fixed portion of the hoisting machine 1, and the other end side 15 b of the string-like body 15 is passed through a deflecting pulley 33 provided on the brake arm 11. Is driven by a drive motor 13a (13b) provided on the base 2 which is a fixed part of the hoisting machine 1, and the string-like body 15 and the baffle pulley 33 constitute a speed reduction mechanism to form a 1/2 speed reduction. Yes.

  In FIG. 17, similarly to FIG. 16, one end 15 a of the string-like body 15 is coupled to the base 2 that is a fixing portion of the hoisting machine 1, and is provided on the baffle pulley 32 and the braking arm 11 provided on the base 2. The other end side 15b of the string-like body 15 is driven by the drive motor 13a (13b) provided on the base 2 which is a fixing portion of the hoisting machine 1 through the deflecting pulleys 33a and 33b, and the string-like body 15 is deflected. The pulleys 33a, 33b, and 32 constitute a speed reduction mechanism to form a 1/4 speed reduction.

  In FIG. 18, the deflection pulleys 33 a and 33 b provided on the braking arm 11 are rotatably supported by the bracket 34 in FIG. 17, and the bracket 34 is rotationally supported by the shaft 36 provided on the braking arm 11.

  Note that the one end side 15 a of the string-like body 15 of FIGS. 16 to 18, the drive motors 13 a and 13 b, and the baffle pulley 32 may be provided in a fixed portion of the hoistway 19.

  In the present embodiment, the same effect as in the first embodiment can be obtained. In the example shown in FIG. 18, since a plurality of baffle pulleys are attached to one bracket, the installation work at the site is simplified and the installation efficiency is improved. Further, since the bracket can be fixed at one point of the shaft 36, there is an effect that it can be attached even in a place where a plurality of baffle pulleys cannot be installed. Further, in the embodiment shown in FIG. 18, there is also an effect that the force is concentrated on the shaft 36 and the force point on the braking arm 11 is concentrated on one point. In particular, even if the force applied to each of the deflecting pulleys 33a and 33b is different due to the driving of the braking arm 11, the power points are concentrated at one point, so that the driving motors 13a and 13b can drive the braking arm 11 more efficiently. Will be able to do.

  Next, an example of the fifth embodiment will be described with reference to FIGS. FIG. 19 is an enlarged view of a main part of an elevator brake device according to a fifth embodiment of the present invention, and FIG. 20 is an enlarged view of a main part showing another form of the fifth embodiment of the present invention. The fifth embodiment differs from the first to fourth embodiments in that an insulator is interposed between the braking arm and the driving means, and the braking arm is driven to decelerate from the driving means.

  The example shown in FIG. 19 is an example in which a lever 37 is interposed in the drive mechanism of the braking arm 11 of FIG. That is, the lever is pivotally supported by a shaft 38 provided on the base 2 of the hoisting machine 1, and one of the levers 37 is interlocked with the brake arm 11 via a push bolt 39, and the other of the levers 37 is a string-like body. 15 is coupled to one end side 15a, and the other end side 15b is driven by a drive motor 13a (13b) for decelerating driving.

  The example shown in FIG. 20 is an example in which a lever is interposed in the drive mechanism of the braking arm 11 of FIG. 18, for example, and one side of the lever 37 is interlocked with the braking arm 11 via a push bolt 39, and baffle pulleys 33a and 33b are provided. The bracket 34 is pivotally supported on the other side of the lever 37, and the one end side 15a of the string-like body 15, the baffle pulley and the drive motor 13a (13b) are connected to the base 2 or the hoistway 19 which is a fixing part of the hoisting machine 1. Install at the fixed part and drive at a reduced speed.

  Note that the example of the insulator 37 of this embodiment has been described with reference to FIGS. 19 and 20, but it can also be applied to the above-described embodiments 1 to 4.

  In the present embodiment, the same effect as in the first embodiment can be obtained, and since a higher speed reduction mechanism can be obtained by the lever 37, the drive torque can be further reduced and the drive motors 13a and 13b can be further reduced in size. In the example shown in FIG. 20, since a plurality of baffle pulleys are attached to one bracket, the installation work at the site is simplified and the installation efficiency is improved. Further, since the bracket can be fixed at one point of the shaft 36, there is an effect that it can be attached even in a place where a plurality of baffle pulleys cannot be installed. Furthermore, in the embodiment shown in FIG. 20, there is also an effect that the force is concentrated on the shaft 36 and the power point on the insulator 37 is concentrated on one point. In particular, even if the force applied to each of the deflecting pulleys 33a and 33b is different as the lever 37 is driven, the power points are concentrated to one point, so that the lever 37 is driven more efficiently by the drive motors 13a and 13b. Will be able to.

DESCRIPTION OF SYMBOLS 1 Hoisting machine 2 Base 3 Electric motor 4 Brake device 7 Car 9 Brake drum 10 Brake piece 11 Brake arm 12 Brake springs 13a, 13b Drive motor 15 String body (15a One end side of string body, 15b String body The other end)
16 drive circuit 17a, 17b drive means 30 hoistway fixing part 31, 32, 32a, 32b, 33, 33a, 33b deflecting pulley 37 insulator

Claims (5)

An electric motor; a brake drum provided in the electric motor; a braking piece disposed opposite to the brake drum; a braking arm that supports the braking piece; a braking spring that presses the braking piece against the brake drum; In an elevator brake device for a hoisting machine, comprising a driving means for releasing the braking by separating the braking piece from the brake drum against the urging force of a braking spring,
The drive means includes a string-like body, a rotary drive motor, and a drive circuit that drives and controls the drive motor,
One end side of the string-like body is coupled to the brake arm or the base of the hoisting machine or the fixed part of the hoistway, and the other end side of the string-like body is driven by the drive motor via a sled pulley. An elevator brake device characterized in that the brake arm is driven. The elevator brake device according to claim 1 , wherein the drive motor is provided on a base of the hoisting machine or a fixed part of a hoistway . The elevator brake device according to claim 1 , wherein the drive motor is provided on the braking arm . The drive means forms a speed reduction mechanism with at least the brake arm, a deflecting pulley provided on either the base of the hoist or a fixed part of the hoistway, and the string-like body, and decelerates the brake arm. 2. The elevator brake device according to claim 1, wherein the elevator brake device is driven . The elevator brake device according to claim 1, wherein an insulator is interposed between the braking arm and the string-like body and driven at a reduced speed .

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