JP2009057188A - Brake release device for elevator hoisting machine, and elevator system with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brake release device capable of releasing a brake provided in an elevator hoisting machine with smaller operating force. <P>SOLUTION: An operation wire 6 is connected to a swing lever 22 of a brake release device 20 in a first swing part at a distance L1 from a support shaft 21, and a displacing member 24 abuts on a second swing part at a distance L2 from the support shaft 21. With this structure, since the swing lever works as a lever, the displacing member 24 of the brake 2 is displaced to release the brake 2 with the small operating force by the principle of leverage. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a device for manually releasing an elevator hoisting machine brake in an emergency, and more particularly to a technique for improving the brake so that the brake can be released with a smaller operating force.

Conventionally, an elevator hoist has been provided with a brake. When the car is moved up and down, the brake is electromagnetically released by energizing the brake so that the traction sheave can rotate.
As a result, if the brakes cannot be energized due to a power failure, etc., the brakes will remain active and the car will not be able to be raised or lowered, so the rescue operation of landing the car stopped between the floors on the nearest floor It is necessary to release the brake manually.
Therefore, a brake release device for manually releasing the brake during rescue operation has been proposed by the applicant of the present application (see Patent Documents 1 and 2 below).

The structure of the brake release device will be outlined with reference to FIGS. 12 and 13. The hoisting machine 2 provided at the top of the elevator hoistway 1 is provided with a brake 3, and the wall surface of the hall hall 4 on the uppermost floor. An operation wire 6 extending from an operation lever 5 provided on the control lever 5 is connected.
As a result, when the brake remains activated due to a power failure or the like and the car 7 cannot be raised or lowered, the rescue worker operates the operation lever 5 to manually release the brake.
Then, the traction sheave 8 can be rotated, and the car 7 naturally rises or falls due to the weight imbalance between the car 7 and the counterweight 9, so that the car 7 can be landed on the nearest floor. it can.

JP 2004-307181 A JP 2007-62900 A

  By the way, as shown in FIG. 13, the brake 3 of the hoisting machine 2 described above includes a pair of front and rear brake arms 12 supported by swinging shafts 10 and 11 extending horizontally in the left-right direction so as to be swingable in the front-rear direction. 13 and a displacement member 14 on which upper ends 12a and 13a of these brake arms are pivotally supported.

A pair of left and right frames 15 a and 15 b fixed to the upper portion of the hoisting machine 2 is attached with a U-shaped bracket 16 in plan view, and the distal end of the outer tube 6 a of the operation wire 6 is secured by a locking tool 17. It is connected.
Further, the inner wire 6b of the operation wire 6 is connected to the rear end upper portion 14a of the displacement member 14 by a locking tool (not shown).
As a result, when the worker performing the rescue operation operates the operation lever 5 and pulls the inner wire 6b, the displacement member 14 is displaced forward as indicated by the arrow A, and the brake arms 12 and 13 swing. The brake 3 can be released.

At this time, since the pair of front and rear brake arms 12 and 13 are always urged toward the brake operating side by an urging means (not shown), when the brake 3 is released, the displacement member 14 is operated with an operating force exceeding a predetermined value. Needs to be displaced forward.
Further, since the operation wire 6 extends while curving from the hall on the top floor to the hoisting machine 2 provided at the top of the hoistway, there is no sliding between the outer tube 6a and the inner wire 6b. Frictional force accompanying movement acts.
Thereby, a rescue worker who rescues the car 7 must operate the operation lever 5 with a large force.

  Furthermore, since the hoisting machine 2 is provided at the top of the hoistway, it is difficult for a rescue worker to visually recognize the operating state of the brake 3 from the hall hall 4 on the top floor.

  Therefore, the object of the present invention is to solve the above-mentioned problems of the prior art, not only to release the brake provided in the elevator hoisting machine with a smaller operating force, but also to easily visually check the operating state of the brake. It is an object of the present invention to provide an improved brake release device.

The means described in claim 1 for solving the above problem is as follows.
A device for releasing an elevator hoisting machine brake using an operating means in an emergency,
A displacement member that is swingably supported by the spindle with respect to the hoisting machine, the operating means is connected to the first swinging portion, and the displacement member is displaced when the brake is released. Equipped with a swing lever connected to the
A distance between the support shaft and the first swinging portion is set to be larger than a distance between the support shaft and the second swinging portion.

That is, the brake release device for an elevator hoist according to claim 1 has a structure in which the brake is released by displacing the displacement member of the brake according to the “lever principle” by operating the swing lever as a “lever”. is there.
Thus, for example, when the distance between the support shaft of the swing lever and the first swing portion is set to twice the distance between the support shaft and the second swing portion, the conventional brake release device described above is used. The brake can be released by displacing the displacement member of the brake with an operating force that is half the size of the brake.

At this time, the operating means can be an operating wire operated by an operating lever provided in the hall on the top floor, as in the above-described conventional brake release device, or can be a battery-driven electric actuator. it can.
Furthermore, the electric actuator can be provided with a control means that can be operated from a monitoring center that remotely monitors the operation of the elevator.

The support shaft of the swing lever can be disposed so as to extend in the horizontal direction, or to extend in the vertical direction, and further incline with respect to the horizontal direction.
At this time, if the support shaft of the swing lever extends horizontally and the swing end of the swing lever protrudes upward from the hoisting machine, the swing lever can be removed from the hall on the top floor. The swing of the upper end, and hence the operating state of the brake device can be easily visually confirmed.
Alternatively, if the support shaft of the swing lever extends in the vertical direction and the swing end of the swing lever protrudes laterally from the hoist, the swing lever from the hall on the top floor It is possible to easily visually check the swinging end of the swinging end, and hence the operating state of the brake device.
Furthermore, if a light reflecting material such as a light reflecting member or a light reflecting tape attached to the rear part of a car or bicycle is applied to the swing end of the swing lever, or a flashlight By using such illumination means, the swinging state of the swing lever can be easily visually recognized from the hall on the top floor.

Furthermore, by covering the periphery of the swing lever with a cover member, it is possible to prevent an operator who inspects the hoisting machine or the brake release device from inadvertently touching the swing lever and releasing the brake. It is possible to prevent malfunction due to adhesion of dust and the like.
At this time, if the cover member is made of a transparent material, the swinging state of the swinging lever can be easily visually recognized from the hall on the top floor.

In addition, the swing lever can be provided with an urging means for returning the swing lever to a predetermined swing position that does not displace the brake displacement member.
This prevents the inner wire from returning due to the sliding friction between the outer tube of the operation wire and the inner wire, and can reliably prevent the brake from being released due to the displacement member of the brake being left displaced. .

  According to the present invention, there is provided an improved brake release device that not only can release a brake provided in an elevator hoisting machine with a smaller operating force but also can easily recognize the operating state of the brake. Can be provided.

Hereinafter, with reference to FIG. 1 thru | or FIG. 11, each embodiment and modified example of the brake release apparatus of the elevator hoisting machine of this invention, and an elevator system provided with the same are demonstrated.
In the following description, the same reference numerals are used for the same parts including the above-described conventional apparatus, and a duplicate description is omitted.

1st Embodiment First, with reference to FIGS. 1-3, the brake release apparatus of 1st Embodiment and an elevator system provided with the same are demonstrated.

The elevator system 100 of 1st Embodiment is equipped with the hoisting machine 2 arrange | positioned at the top part of the elevator hoistway 1 similarly to the prior art shown in FIG.
The hoisting machine 2 is provided with a brake 3 so that the traction sheave 8 can be braked in a non-rotatable manner.
And the operation wire 6 extended from the operation lever 5 provided in the wall surface of the hall | hole 4 of the top floor is connected to this brake 3 via the brake releasing apparatus 20 shown in FIGS.

  As shown in FIGS. 1 to 3, the brake release device 20 is stretched between a pair of left and right frames 15 a and 15 b fixed to the upper portion of the hoisting machine 2 and extends horizontally in the left and right directions. A support shaft 21 supported by a bracket that is not provided, and a swing lever 22 that is supported by the support shaft 21 at its lower end and extends upward while being swingable in the front-rear direction.

Further, the front end of the outer tube 6 a of the operation wire 6 is locked by a locking tool 17 to the U-shaped bracket 23 in a plan view spanned over the front end portions of the pair of left and right frames 15 a and 15 b.
Further, the front end of the inner wire 6 b of the operation wire 6 is locked to the swing end (first swing portion) of the swing lever 22 by a locking tool 18.

  In addition, a hemispherical contact portion 25 that contacts the front surface of the swing lever 22 is provided at the rear end of the displacement member 24 on which the upper ends 12a and 12b of the pair of front and rear brake arms 12 and 13 are pivotally supported. The rocking lever 22 is in contact with a portion (second rocking portion) slightly above the support shaft 21.

As a result, when the operation lever 5 provided on the wall surface of the hall hall 4 on the top floor is operated and the inner wire 6b is pulled forward as shown by an arrow B in FIG. Since it swings around 21, the contact portion 25 of the displacement member 24 is pushed by the swing lever 22 and is displaced forward.
As a result, the pair of front and rear brake arms 12 and 13 swing around the support shafts 10 and 11, so that the brake 3 of the hoisting machine 2 is released and the traction sheave 8 can rotate.

At this time, as shown in FIG. 3, the distance between the support shaft 21 and the portion of the swing lever 22 where the front end of the inner wire 6b is locked (first swing portion) 22a is L1. Yes.
Further, a distance between the portion (second swinging portion) 22b of the swing lever 22 with which the contact portion 25 of the displacement member 24 contacts (second swinging portion) 22b and the support shaft 21 is L2.
The ratio between the distance L1 and the distance L2 is about 3: 1.
Thereby, according to the “lever principle”, a force about three times the force of the inner wire 6b pulling the first swinging portion 22a forward acts on the second swinging portion 22b.
Therefore, compared with the conventional brake releasing device shown in FIG. 13, the magnitude of the operating force applied to the operating lever 5 to release the brake 3 is about one third.

Further, as shown in FIG. 1, the upper end 22 c of the swing lever 22 extending vertically upward from the support shaft 21 protrudes upward from the main body portion of the hoisting machine 2.
As shown in FIG. 2, a light reflecting member 26 is attached to the side surface of the upper end 22 c of the swing lever 22.
Thus, when an operator operating the operating lever 5 in the hall hall 4 on the top floor irradiates the hoisting machine 2 with illumination light, the upper end of the swing lever 22 is swung, and therefore the brake 3 is in an operating state. Can be easily recognized.

First Modification Next, a brake release device 30 and an elevator system 110 including the brake release apparatus 30 according to a first modification will be described with reference to FIGS. 4 and 5.

  The brake release device 20 of the first embodiment described above has a structure that pulls the upper end of the swing lever forward, but the brake release device 30 of the first modification has a structure that pulls the upper end of the swing lever backward. It has become.

More specifically, the brake release device 30 includes a support shaft 31 supported by a bracket (not shown) that extends between the pair of left and right frames 15a and 15b and extends horizontally in the left-right direction. An intermediate portion in the longitudinal direction is pivotally supported and has a swing lever 32 that swings in the front-rear direction while extending in the vertical direction.
Further, the front end of the outer tube 6a of the operation wire 6 extending from the rear to the front is locked to the U-shaped bracket 33 in a plan view spanned between the pair of left and right frames 15a and 15b behind the swing lever 32. It is locked by the tool 17.
Further, the front end of the inner wire 6 b of the operation wire 6 is connected to the upper end of the swing lever 32 by a locking tool 18.
In addition, a hemispherical contact portion 25 of the displacement member 24 is in contact with the lower end of the swing lever 32.

Accordingly, when the operation lever 5 provided on the wall surface of the hall hall 4 on the top floor is operated and the inner wire 6b is pulled backward as shown by an arrow D in FIG. By swinging forward, the contact portion 25 of the displacement member 24 is displaced forward.
As a result, the pair of front and rear brake arms 12 and 13 swing around the support shafts 10 and 11, so that the brake 3 of the hoisting machine 2 is released and the traction sheave 8 can rotate.

At this time, as shown in FIG. 5, the distance between the portion (first swinging portion) 32a of the swing lever 32 to which the front end of the inner wire 6b is connected and the support shaft 31 is L1. .
Further, the distance between the portion (second swinging portion) 32b with which the contact portion 25 of the displacement member 24 contacts and the support shaft 31 of the swing lever 32 is L2.
The ratio between the distance L1 and the distance L2 is about 2.5: 1.
As a result, a force about 2.5 times the force with which the inner wire 6b pulls the first swinging portion 22a backward acts on the second swinging portion 32b.
Therefore, as compared with the conventional brake releasing device shown in FIG. 13, the magnitude of the operating force applied to the operating lever 5 to release the brake 3 is only about 1/2.

Second Modification Next, a brake release device 40 and an elevator system 120 including the brake release apparatus 40 according to a second modification will be described with reference to FIG.

In the brake release device 20 of the first embodiment and the brake release device 30 of the first modification described above, the swing levers 22 and 32 are pivotally supported by the support shafts 21 and 32 extending horizontally in the left-right direction. It was arranged to extend in the vertical direction.
On the other hand, the brake release device 40 of the second modification has a structure in which the swing lever is pivotably supported by a support shaft extending in the vertical direction and swings in the front-rear direction in a horizontal plane.

More specifically, the brake release device 40 includes a support shaft 42 that is attached to a bracket 41 fixed to the left frame 15a of the hoisting machine 2 and extends in the vertical direction, and a base end ( The left end) is pivotally supported and has a swing lever 43 that can swing in a horizontal plane.
Further, the front end of the outer tube 6a of the operation wire 6 is connected to the right end portion of the U-shaped bracket 44 spanned between the front end portions of the pair of left and right frames 15a and 15b by a locking tool 17. .
Further, the front end of the inner wire 6 b of the operation wire 6 is connected to the swing end (right end) of the swing lever 43 by a locking tool 18.
In addition, the hemispherical contact portion 25 of the displacement member 24 is in contact with a portion close to the support shaft 42 in the longitudinal intermediate portion of the swing lever 43.

As a result, when the operation lever 5 provided on the wall surface of the hall hall 4 on the top floor is operated and the inner wire 6b is pulled forward as shown by the arrow B in FIG. 6, the swing lever 43 is moved forward. By swinging, the contact portion 25 of the displacement member 24 is displaced forward.
As a result, the pair of front and rear brake arms 12 and 13 swing around the support shafts 10 and 11, so that the brake 3 of the hoisting machine 2 is released and the traction sheave 8 can rotate.

At this time, as shown in FIG. 6, the distance between the portion of the swing lever 43 to which the front end of the inner wire 6 b is connected (first swing portion) 43 a and the support shaft 42 is L <b> 1. .
In addition, the distance between the portion (second swinging portion) 43b of the swing lever 43 with which the contact portion 25 of the displacement member 24 contacts (second swinging portion) 43b and the support shaft 42 is L2.
The ratio between the distance L1 and the distance L2 is about 3: 1.
As a result, a force about three times the force with which the inner wire 6b pulls the first swinging portion 43a forward acts on the second swinging portion 41b.
Therefore, as compared with the conventional brake release device shown in FIG. 13, the brake 3 can be released with an operating force of about one third.

Further, the swing lever 43 of the brake release device 40 of the second modification is structured to swing in a horizontal plane in the space between the pair of left and right frames 15a and 15b fixed to the upper part of the hoisting machine 2. It is.
As a result, there is no portion projecting upward from the pair of left and right frames 15a and 15b, so that the hoisting machine 2 can be disposed at a position very close to the ceiling surface of the hoistway 1.

Third Modification Next, a brake release device 50 and an elevator system 130 including the same according to a third modification will be described with reference to FIG.

  The brake release device 40 of the second modification described above has a structure that pulls the swing end of the swing lever forward, but the brake release device 50 of the third modification has a swing end of the swing lever. It has a structure that draws back.

More specifically, the brake release device 50 is supported by a bracket 51 that extends over a pair of left and right frames 15a and 15b and extends horizontally in the left-right direction, and a portion on the right side of the longitudinal central portion of the bracket 51. The support shaft 52 extends in the vertical direction, and an intermediate portion in the longitudinal direction is supported by the support shaft 52, and the swing lever 53 swings back and forth in a horizontal plane.
In addition, the front end of the outer tube 6a of the operation wire 6 extending from the rear to the front is engaged with the U-shaped bracket 54 in a plan view spanned between the pair of left and right frames 15a and 15b behind the swing lever 53. Connected by a stopper 17.
Further, the front end of the inner wire 6 b of the operation wire 6 is connected to the right swing end of the swing lever 53 by a locking tool 18.
In addition, the hemispherical contact portion 25 of the displacement member 24 is in contact with the swing end on the left side of the swing lever 53.

As a result, when the operation lever 5 provided on the wall surface of the hall hall 4 on the top floor is operated and the inner wire 6b is pulled backward as indicated by an arrow D in FIG. 7, the swing lever 53 swings. Then, the contact portion 25 of the displacement member 24 is displaced forward.
As a result, the pair of front and rear brake arms 12 and 13 swing around the support shafts 10 and 11, so that the brake 3 of the hoisting machine 2 is released and the traction sheave 8 can rotate.

At this time, as shown in FIG. 7, the distance between the portion (first swinging portion) 53a of the swing lever 53 to which the front end of the inner wire 6b is connected and the support shaft 52 is L1. .
Further, the distance between the portion (second swinging portion) 53b of the swing lever 53 with which the contact portion 25 of the displacement member 24 contacts (second swinging portion) 53b and the support shaft 52 is L2.
The ratio between the distance L1 and the distance L2 is about 2: 1.
As a result, a force about twice as much as the inner wire 6b pulls the first swinging portion 53a backward acts on the second swinging portion 53b.
Therefore, as compared with the conventional brake release device shown in FIG. 13, the brake 3 can be released with an operating force of about one half.

Fourth Modification Next, with reference to FIG. 8, a brake release device 60 according to a fourth modification and an elevator system 140 including the same will be described.

  The brake release device 60 of the fourth modified example is for swinging and returning the swing lever to a predetermined swing position where the displacement member is not displaced with respect to the brake release device 20 of the first embodiment shown in FIG. It is what added the biasing means.

More specifically, the brake release device 60 includes a support shaft 61 that extends horizontally in the left-right direction, and a swing lever that is swingable in the front-rear direction while being supported by the support shaft 61 in the vicinity of its lower end and extending upward. 62.
Further, a pin 64 that is supported by a bracket 63 fixed to the upper surface of the hoisting machine 2 and extends forward is inserted through an insertion hole that penetrates the lower end 62 a of the swing lever 62.
A compression coil spring 65 loosely fitted to the pin 64 biases the lower end of the swing lever 62 forward.

As a result, the upper end 62b of the swing lever 62 is urged by the compression coil spring 65 to be displaced rearward, and pulls the inner wire 6b of the operation wire 6 rearward.
Therefore, due to the sliding friction between the outer tube 6a of the operation wire 6 and the inner wire 6b, the inner wire 6b is not pulled back while being pulled forward, and the displacement member 24 remains displaced forward and the brake 2 is released. Can be reliably prevented.

Fifth Modification Next, a brake release device 70 and an elevator system 150 including the same according to a fifth modification will be described with reference to FIG.

The brake release device 60 of the fourth modified example described above has a structure that always pulls the inner wire 6b backward by urging the lower end 62a of the swing lever 62 forward.
On the other hand, the fifth modification has a structure in which the inner wire 6b is always pulled backward by urging the vicinity of the upper end of the swing lever backward.

More specifically, the brake release device 70 of the fifth modified example has a support shaft 71 that extends horizontally in the left-right direction, and a lower end of the support shaft 71 that is pivotally supported by the support shaft 71 so as to swing upward and backward. And a rocking lever 72.
Further, a pin 74 that is supported by a bracket 73 fixed to the left frame 15 a of the hoisting machine 2 and extends forward is inserted into an insertion hole penetrating near the upper end of the swing lever 72.
A compression coil spring 75 loosely fitted to the pin 74 urges the vicinity of the upper end portion of the swing lever 62 rearward.

As a result, the upper end of the swing lever 72 is urged by the compression coil spring 75 and always displaced rearward, and pulls the inner wire 6b of the operation wire 6 rearward.
Therefore, due to the sliding friction between the outer tube 6a of the operation wire 6 and the inner wire 6b, the inner wire 6b is not pulled back while being pulled forward, and the displacement member 24 remains displaced forward and the brake 2 is released. Can be reliably prevented.

Second Embodiment Next, a brake release device 80 according to a second embodiment and a brake system 200 including the brake release device 80 will be described with reference to FIG.

The brake release device 80 of the second embodiment shown in FIG. 10 has a structure in which the entire brake release device 20 of the first embodiment shown in FIG.
As a result, it is possible to prevent an operator who checks the hoisting machine 2 from inadvertently touching the swing lever or the like to release the brake 3, and dust is attached to the swing lever or the like, resulting in malfunction. Can be reliably prevented.

Sixth Modification Next, a brake release device 90 and an elevator system 210 including the brake release apparatus 90 according to a sixth modification will be described with reference to FIG.

The brake release device 90 of the sixth modified example has a structure in which the entire brake release device 20 of the first embodiment shown in FIG. 1 is covered with a transparent cover member 91.
As a result, it is possible to prevent an operator who checks the hoisting machine 2 from inadvertently touching the swing lever or the like to release the brake 3, and dust is attached to the swing lever or the like, resulting in malfunction. Can be reliably prevented.
Further, since the light reflecting member 26 provided at the upper end of the swing lever 22 can be visually recognized through the transparent cover member 91, the state of the swing lever 22, and hence the brake 3, from the hall hall 4 on the top floor. Can be easily recognized.

As mentioned above, although each embodiment and each modification of a brake release device of an elevator hoisting machine concerning the present invention and an elevator system provided with it were explained in detail, the present invention is not limited by the embodiment mentioned above, Various changes are possible.
For example, in the brake release device 40 of the second modification shown in FIG. 6, the swing lever 41 is disposed between the pair of left and right frames 15 a and 15 b of the hoisting machine 2.
At this time, the swinging end of the swinging lever 41 is bent and extended rightward so as to protrude to the side of the hoisting machine 2, and a light beam reflecting means is attached to the lower surface of the tip, thereby allowing the hall hall on the uppermost floor 4, the operator who operates the operation lever 5 can easily recognize the swing of the swing lever 41, and hence the operating state of the brake 3.

1 is a side view showing a brake release device according to a first embodiment and an elevator system including the same. FIG. 2 is a plan view of the brake release device and the hoisting machine shown in FIG. 1. The principal part cross-sectional side view which shows typically the action | operation of the brake release apparatus shown in FIG. The top view of the brake release apparatus and winding machine of a 1st modification. FIG. 5 is a cross-sectional side view of an essential part schematically showing the operation of the brake release device shown in FIG. 4. The top view which shows typically the action | operation of the brake release apparatus of a 2nd modification. The top view which shows typically the action | operation of the brake release apparatus of a 3rd modification. The principal part cross-sectional side view which shows typically the action | operation of the brake release apparatus of a 4th modification. The principal part cross-sectional side view which shows typically the action | operation of the brake release apparatus of a 5th modification. The side view which shows the brake release apparatus of 2nd Embodiment, and an elevator system provided with the same. The side view which shows the brake release apparatus of a 6th modification, and an elevator system provided with the same. The side view which shows the whole brake release apparatus structure of the conventional elevator hoisting machine. The perspective view which shows the principal part of the brake release apparatus of the conventional elevator hoisting machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Elevator hoistway 2 Hoisting machine 3 Brake 4 Hall hall 5 Operation lever 6 Operation wire 7 Ride car 8 Traction sheave 9 Balance weight 10, 11 Brake spindle 12, 13 Brake arm 14 Displacement member 15a, 15b Frame 16 Bracket 20 Brake release device of first embodiment 21 Support shaft 22 Swing lever 23 Bracket 24 Displacement member 25 Contact portion 30 Brake release device of first modification 31 Support shaft 32 Swing lever 40 Brake release of second modification Device 41 Oscillation lever 43 Support shaft 50 Brake release device of third modification 52 Support shaft 53 Oscillation lever 53a First oscillation portion 53b Second oscillation portion 60 Brake release device of fourth modification 61 Support shaft 62 Oscillation Moving lever 63 Bracket 64 Pin 65 Coil spring (biasing means)
70 Brake release device of fifth modified example 71 Support shaft 72 Oscillating lever 73 Bracket 74 Pin 75 Coil spring (biasing means)
80 Brake release device of 2nd embodiment 81 Cover member 90 Brake release device of 6th modification 91 Cover member 100 Elevator system 110 provided with brake release device of 1st Embodiment The brake release device of 1st modification was provided. Elevator system 120 Elevator system 130 including the brake release device according to the second modified example Elevator system 140 including the brake release device according to the third modified example Elevator system 150 including the brake release device according to the fourth modified example Elevator system 200 provided with a brake release device Elevator system 210 provided with a brake release device according to the second embodiment Elevator system provided with a brake release device according to a sixth modification

Claims (11)

A device for releasing an elevator hoisting machine brake using an operating means in an emergency,
A displacement member that is swingably supported by the spindle with respect to the hoisting machine, the operating means is connected to the first swinging portion, and the displacement member is displaced when the brake is released. Equipped with a swing lever connected to the
A brake for an elevator hoisting machine, wherein a distance between the support shaft and the first swinging portion is set larger than a distance between the support shaft and the second swinging portion. Opening device.   The brake release device for an elevator hoist according to claim 1, wherein the operating means is an operating wire operated by an operating lever provided at a landing.   The brake release device for an elevator hoist according to claim 1, wherein the operating means is a battery-driven electric actuator attached to the hoist.   4. The elevator hoisting machine brake according to claim 3, wherein the electric actuator is provided with a control means for controlling its operation from a remote monitoring center that monitors the operation of the elevator. Opening device.   2. The swing lever according to claim 1, wherein a support shaft of the swing lever extends in a horizontal direction, and a swing end of the swing lever protrudes upward from the hoisting machine. Brake release device for elevator hoisting machine.   2. The swing lever according to claim 1, wherein a support shaft of the swing lever extends in a vertical direction, and a swing end of the swing lever protrudes laterally from the hoisting machine. Elevator hoist brake release device.   The brake release device for an elevator hoist according to claim 5 or 6, wherein the swing lever has a light beam reflecting means at a swing end thereof.   The brake release device for an elevator hoist according to any one of claims 1 to 7, further comprising a cover member that covers the swing lever and the displacement member.   The brake release device for an elevator hoist according to claim 8, wherein the cover member is made of a transparent material.   The elevator hoisting machine according to any one of claims 1 to 9, further comprising biasing means for swinging and returning the swing lever to a predetermined swing position where the displacement member is not displaced. Brake release device.   An elevator system comprising the brake release device for an elevator hoist according to any one of claims 1 to 10.

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