JP2006341942A - Device and method for manually releasing brake for elevator hoisting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manual brake releasing device of a brake for an elevator hoisting machine which has a large releasing force of the brake and is used for a large brake device. <P>SOLUTION: The manual brake releasing device of the brake for the elevator hoisting machine comprises a fixed core 9a, a manual releasing pin 11 having an expanded part 11a provided on the fixed core 9a, a movable core 9b which is provided facing the fixed core 9a and displaced in the advancing/retracting direction to/from the fixed core 9a slidably with the pin 11, and a push spring which displaces the movable core 9b when the brake falls, and provides the braking force, and further comprises a manual brake releasing tool 13 consisting of a wedge part 13a which is used when the brake falls and attachably/detachably engaged with the pin 11, and a handle part 13c extending in the separating direction from the wedge part 13a. By applying the rotational force to the manual brake releasing tool 13 by the handle part 13c, the wedge part 13a applies the axial force between the expanded part 11a of the pin for manual release and the movable core 9b to release the brake. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the elevator hoisting machine and elevator car, in the event of an emergency such as a power failure, when the brake device is dropped due to a safety mechanism and the emergency stop is performed, the elevator car is immediately moved to the nearest floor to rescue passengers. TECHNICAL FIELD The present invention relates to a manual release device and a manual release method for a brake for an elevator hoisting machine that releases a brake at the same time.

  In the conventional manual release device for brakes for elevator hoists, the force that pulls the movable iron core and fixed iron core, which is the brake releasing force, is applied between the enlarged diameter part of the manual release pin provided on the fixed iron core and the movable iron core. It is obtained by applying a wedge-shaped manual brake release tool or the like, and is configured to release the brake (see, for example, Patent Document 1).

JP-A-2004-189418 (Sections 7, 10 and 12)

In the conventional manual release device for elevator hoisting brakes, the force to act (push in) the wedge is to screw the tip of the screw loosely fitted into the wedge part into the screw hole provided on the movable iron core side and rotate it. Is obtained. However, the pushing force and the pushing amount are limited, and the brake releasing force cannot be increased by increasing the pushing force and sharpening the wedge angle. Therefore, only about 1/2 to 1/10 of the brake opening force can be obtained with respect to the braking force applied when the brake is dropped, and there is a problem that it cannot be used for a large brake device having a large braking force.
In addition, conventionally, it is not possible to obtain the force to pull out the wedge, and it is possible to manually release the brake, but it is impossible to restore the brake braking, and it is impossible to adjust the brake releasing force and braking force. .

The present invention has been made to solve the above-described problems. The first object of the present invention is to provide a manual brake for an elevator hoisting machine that has a larger brake releasing force and can be used for a larger brake device. To obtain an opening device.
A second object is to obtain a manual release device for an elevator hoisting machine brake that can manually release the brake and restore the brake and can freely adjust the brake release force and the application of the brake force.

  In the elevator hoisting brake manual release device according to the present invention, the fixed iron core, the manual release pin having the enlarged diameter portion provided on the fixed iron core, and the fixed iron core are provided so as to face the fixed iron core. A movable iron core that slides with a fixed pin and displaces in a direction away from the fixed iron core, a movable spring that displaces the movable iron core when the brake is dropped, and an electromagnetic magnet that releases the braking force against the push spring Comprising a wedge part that is detachably engaged with a manual release pin and a handle part extended in a direction away from the wedge part. By applying rotational force to the manual brake release tool by the handle part, the wedge part applies axial force between the enlarged diameter part of the manual release pin and the movable iron core to release the brake. Is shall.

  According to the present invention, it is possible to obtain a larger force and pushing amount for pushing the wedge, to obtain a large brake releasing force, and to manually release a larger brake device. Also, a force can be obtained on the side where the wedge is pulled out, the brake braking can be restored, and the manual brake release force and braking force application can be freely adjusted.

Embodiment 1 FIG.
1 is a longitudinal sectional view showing the whole elevator hoisting machine according to Embodiment 1 of the present invention, FIG. 2 is a front view showing a brake device of the elevator hoisting machine, and FIG. 3 is taken along the line AA in FIG. 4 is a cross-sectional view, FIG. 4 is a manual brake release tool, and FIG. 5 is a cross-sectional view taken along line BB in FIG. In FIG. 1, 1 is an elevator hoisting machine, 2 is a housing of a bowl-shaped elevator hoisting machine, and 3 is a main shaft provided in the center of the housing 2 in the horizontal direction. 4 is a drive sheave that is pivotally supported by the main shaft 3 and rotates. It is to be moved. Reference numeral 5 denotes a saddle type rotating body integrally formed with the driving sheave 4. Reference numeral 6 denotes a stator winding disposed on the inner periphery of the opening edge of the housing 2. Reference numeral 7 denotes a field magnet disposed on the outer periphery of the rotating body 5 on the opposite side of the driving sheave 4 and makes the elevator hoist 1 function as an electric motor when paired with the stator winding 6. Reference numeral 8 denotes a braking surface of the rotating body provided on the inner periphery of the rotating body 5. A brake device 9 for the elevator hoisting machine 1 is fixed to a support portion 10 attached to the opening edge side of the housing 2 and faces the braking surface 8 of the rotating body 5.

  2 and 3, reference numeral 9 a denotes a fixed iron core provided in the brake device 9, which is fixed to the support portion 10 connected to the housing 2. 9b is a movable iron core that is provided in the brake device 9 and that is movable in the direction of separation from the fixed iron core 9a. 9d is a brake lining that is connected to and interlocked with the movable iron core 9b in the brake device 9, and is positioned so as to be opposed to and disengaged from the braking surface 8 of the rotating body 5 by a pair of left and right fixed arms 9c that are connecting portions. The rotating body 5 and the drive sheave 4 are controlled by receiving a force pressed against the braking surface 8. Reference numeral 9e denotes an electromagnetic magnet provided inside the fixed iron core 9a, which is excited when the elevator power is supplied and has a variable magnetic force to attract the movable iron core 9b. 9g is a bolt for adjusting the gap between the fixed iron core 9a and the movable iron core 9b and is provided on the movable iron core 9b. 9f is a pair of left and right push springs provided to expand and contract in the radial direction, one end is connected to the fixed core 9a and the other end is contracted to the bolt 9g, and the force that pushes the movable core 9b away from the fixed core 9a Is to give.

Here, the braking force of the brake is a force by which the pressing spring 9f presses the movable iron core 9b and the connected brake lining 9d against the braking surface 8. When the maximum force is applied, the rotating body 5 and the driving sheave 4 rotate. It is enough power to make it stand still.
In addition, the brake drop is controlled by the variable magnetic force of the electromagnetic magnet 9e which conflicts when the elevator power is supplied, and the rotating body 5 and the driving sheave 4 are Cannot rotate. The movable iron core 9b is positioned farthest from the fixed iron core 9a.

  9h is a screw hole provided in the surface facing the movable iron core 9b of the fixed iron core 9a. 9i is a through hole provided through the movable core 9b so as to face the screw hole 9h provided in the fixed core 9a. 11 is a rod-shaped manual release pin used when the brake is released. The screw 11b provided at one end is screwed into the screw hole 9h and is erected on the fixed iron core 9a. It fits and penetrates, and also has a role of guiding the movable iron core 9a to move in the radial direction by sliding with the inner wall of the through hole 9i. 11a is an enlarged head of the pin 11 and is connected to one end of the pin 11. It has a disk shape and the lower surface faces the movable iron core 9b, and is closest to and in contact with the movable iron core 9b when the brake is dropped. It is provided in a position that is not. A cylindrical projection 12 is fixed on the surface of the movable iron core 9b facing the braking surface 8 of the rotating body, and is fixed in the vicinity of the through hole 9i and the pin 11.

  In FIG. 3, 13 is a manual brake release tool. 13a is a wedge part provided in the brake release device, which is U-shaped, and has two wedges with the tip of the parallel part being the tip part. As shown in FIG. 5, the wedge provided in the wedge portion 13a has an angle where the inclination of one surface becomes the wedge angle θ, and the thickness of the tip is the head 11a of the pin 11 and the movable iron core 9b when the brake is dropped. The inner width of each pin is wider than the diameter of the pin 11 and sufficiently narrower than the diameter of the head portion 11a of the pin 11, and the outer width of each pin is larger than the diameter of the head portion 11a of the pin 11. It is wide. 13b is a rotation fulcrum provided at the front end of the manual brake release tool and in the vicinity of the wedge portion 13a. The shape is a circular through hole and the same diameter as the projection 12, and the distance between the center and the wedge portion 13a is the distance of the projection 12. It is equal to the distance between the center and the center of the pin 11. 13c is a handle portion provided near the tip far from the rotation fulcrum 13c of the manual brake release tool for reducing the brake release force.

In the elevator hoisting machine manual release device and manual brake release device configured as described above, a method and operation for releasing the brake when the brake is dropped will be described with reference to FIGS.
The manual brake release tool 13 is inserted into the space between the brake lining 9d and the movable iron core 9b, the rotation fulcrum 13b is fitted into the protrusion 12, and the manual brake release tool 13 is rotated clockwise around the rotation fulcrum 13b. The pin 11 is sandwiched between the U-shaped portions of the wedge portion 13a. Here, as shown in FIG. 7, the wedge tip provided in the wedge portion 13a enters the gap between the head 11a of the pin 11 and the movable iron core 9b. Holding the handle portion 13c, a clockwise rotational force indicated by an arrow about the rotation fulcrum 13c is applied to the manual brake release tool 13. Due to the wedge effect, sufficient force is applied to the movable iron core 9b, the head 11a of the pin 11 and the pin 11 to be separated.

Since the pin 11 is connected to the fixed iron core 9a on the opposite side of the movable iron core, the brake opening force that is a force in the direction toward the fixed iron core 9a, that is, the direction away from the braking surface 8, is applied to the movable iron core 9b and the brake running 9d. The brakes can be released.
The brake release force and braking force can be adjusted by holding the handle portion 13c and repeatedly applying clockwise and counterclockwise rotational forces to the manual brake release tool 13.
Further, in this patent, the brake is released when a clockwise force is applied as an example, but it is also possible to release the brake counterclockwise by inverting the configuration of the release device symmetrically. .

  By using a manual brake release tool for such an elevator hoist brake manual release device, the distance between the force point (grip part) and the action point (wedge part) or fulcrum (rotation fulcrum) Since it is larger than the distance of the fulcrum, it is possible to apply a large force to the action point, and thus it is possible to obtain a larger brake releasing force.

  Further, since the pushing amount of the wedge portion can be increased, the wedge angle can be sharpened, and a greater brake release force can be obtained.

  In addition, since a large force can be generated not only for pushing the wedge portion but also for the pulling force, it is possible to manually adjust the brake release force and braking force.

  Further, since this manual brake release tool can be easily attached to and detached from the brake device, the work of releasing the brake can be performed easily and quickly, and one manual brake release tool can be used for many brake devices.

Embodiment 2 FIG.
In the first embodiment, it is necessary to fit the rotation fulcrum 13c into the protrusion 12, but in the second embodiment, this is unnecessary.
FIG. 8 is a front view showing a brake device for an elevator hoisting machine according to the second embodiment, in which the same reference numerals are used except for the parts having the same reference numerals as those in FIG. FIG. 9 is a cross-sectional view taken along the line DD of FIG. FIG. 10 is a manual brake releasing device according to the second embodiment, and FIG. 11 is a cross-sectional view taken along line EE in FIG.
8 and 9, 11a ′ is a shape obtained by deforming the head portion 11a of the pin 11 in the first embodiment, and has a shape characterized in that the width in the depth direction is wider than that in the lateral direction.

In FIG. 10, reference numeral 14 denotes a manual brake release tool according to the second embodiment.
14a is a wedge part provided at the tip of the manual brake release device, and the shape is a through hole that is long in the lateral direction. The wedge part is provided with two wedges in the parallel part so that the head 11a 'of the pin 11 can pass through.
As shown in FIG. 11, the two parallel wedges provided in the joint portion 14a have the same shape as the wedge provided in the wedge portion 13a, but the respective inclinations are opposite to each other. The width is wider than the lateral width of the head 11 a ′ of the pin 11 and sufficiently narrower than the width in the depth direction, and wider than the diameter of the pin 11.
14c is a handle portion provided near the distal end of the manual brake release tool 14 on the opposite side of the joint portion 14a.

A method and operation for releasing the brake when the brake is dropped in the elevator hoisting machine manual release device and the manual brake release tool configured as described above will be described with reference to FIGS.
The manual brake release tool 14 is inserted into the space between the brake lining 9d and the movable iron core 9b, the wedge portion 14a is passed through the head 11a 'of the pin 11, and the wedge portion 14a is rotated around the wedge portion 14a in the clockwise direction of the arrow. Here, as shown in FIG. 13, the tip of the wedge provided in the wedge portion 14a enters the gap between the head 11a ′ of the pin 11 and the movable iron core 9b from the direction of rotation about the pin 11, respectively. Holding the handle portion 14c, a clockwise rotational force about the wedge portion 14a is applied to the manual brake release device 14. Due to the wedge effect, the movable iron core, the head 11a 'and the pin 11 are pulled apart with a sufficient force to give the brake release force.
Further, in this patent, the brake is released when a clockwise force is applied as an example, but it is also possible to release the brake counterclockwise by inverting the configuration of the release device symmetrically. .

  By using the elevator hoisting machine brake manual release device for the elevator hoisting machine brake device 9 ', the wedge part 14a of the manual elevator opening tool also serves as a rotation fulcrum. This eliminates the need for a projection provided on the movable core, and eliminates the need to fit the rotation fulcrum into the projection, thus facilitating the work.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing an entire elevator hoisting machine according to Embodiment 1 of the present invention. 1 is a front view showing a brake device for an elevator hoist according to Embodiment 1 of the present invention. FIG. FIG. 3 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a diagram of a manual brake release device according to Embodiment 1 of the present invention. FIG. 5 is a sectional view taken along line BB in FIG. FIG. 3 is a diagram showing a state where a brake release tool is applied to the elevator hoisting machine according to Embodiment 1 of the present invention. FIG. 7 is a cross-sectional view taken along the line CC in FIG. FIG. 6 is a front view showing a brake device for an elevator hoist according to Embodiment 2 of the present invention. FIG. 8 is a cross-sectional view taken along the line DD of FIG. FIG. 10 is a diagram of a manual brake release device according to Embodiment 2 of the present invention. FIG. 11 is a cross-sectional view taken along line EE in FIG. FIG. 6 is a diagram showing a state in which a brake release tool is made in the elevator hoisting machine according to Embodiment 2 of the present invention. FIG. 13 is a sectional view taken along line FF in FIG.

Explanation of symbols

1 elevator hoisting machine, 2 housing, 3 main shaft, 4 drive sheave, 5 rotating body, 6 stator winding,
7, Field magnet, 8 Rotating body braking surface, 9, 9 'brake device, 9a fixed iron core, 9b movable iron core, 9c fixed arm, 9d brake lining, 9e electromagnetic magnet, 9f push spring, 9g bolt, 9h screw hole , 9i Through hole, 10 Brake support, 11 pin, 11a, 11a 'pin head, 12 protrusion, 13, 14 Brake release, 13a, 14a Wedge part, 13b, 14b wedge, 13c Rotating fulcrum, 13d 14c Handle part

Claims (6)

A fixed iron core, a pin for manual opening having an enlarged diameter portion provided on the fixed iron core, a movable iron core that is provided opposite to the fixed iron core and that slides on the pin and displaces in a direction away from the fixed iron core; In the elevator hoisting machine brake composed of a pressing spring that displaces the movable iron core when the brake is dropped and gives a braking force, and an electromagnetic magnet that releases the braking force against the pressing spring,
A manual brake release tool comprising a wedge portion that is used when the brake is dropped and is detachably engaged with the manual release pin, and a handle portion that extends in a direction away from the wedge portion;
By applying a rotational force to the manual brake release tool by the handle portion, the wedge portion applies an axial force between the diameter-expanded portion of the manual release pin and the movable iron core to release the brake. Manual release device for elevator hoisting machine brakes.   The movable iron core is provided with a protrusion in the vicinity of the manual release pin, and the manual brake release tool is provided with a rotation fulcrum that is detachably engaged with the protrusion at a tip opposite to the handle portion. 2. The wedge part is detachably engaged with the manual release pin when the rotation fulcrum engages and the manual brake release tool rotates around the rotation fulcrum. The manual release apparatus of the brake for elevator hoists as described.   2. The manual release device for an elevator hoisting machine brake according to claim 1, wherein the manual brake release tool includes a wedge portion that also serves as a rotation fulcrum. A fixed iron core, a pin for manual opening having an enlarged diameter portion provided on the fixed iron core, a movable iron core that is provided opposite to the fixed iron core and that slides on the pin and displaces in a direction away from the fixed iron core; In the elevator hoisting machine brake composed of a pressing spring that displaces the movable iron core when the brake is dropped and gives a braking force, and an electromagnetic magnet that releases the braking force against the pressing spring,
A manual brake release tool comprising a wedge portion that is used when the brake is dropped and is detachably engaged with the manual release pin; and a handle portion that extends in a direction away from the wedge portion;
Engaging the wedge portion with the manual release pin;
Rotating the manual brake release tool by the handle portion;
A method for manually releasing a brake for an elevator hoisting machine, wherein the wedge portion includes a step of releasing the brake by applying an axial force of the rotation between the enlarged diameter portion of the manual release pin and the movable iron core. A fixed iron core, a pin for manual opening having an enlarged diameter portion provided on the fixed iron core, a movable iron core that is provided opposite to the fixed iron core and that slides on the pin and displaces in a direction away from the fixed iron core; In the elevator hoisting machine brake composed of a pressing spring that displaces the movable iron core when the brake is dropped and gives a braking force, and an electromagnetic magnet that releases the braking force against the pressing spring,
A manual brake release tool comprising a wedge portion that is used when the brake is dropped and is detachably engaged with the manual release pin, and a handle portion that extends in a direction away from the wedge portion;
The movable iron core has a protrusion in the vicinity of the manual release pin, and the manual brake release tool has a rotation fulcrum that is detachably engaged with the protrusion at the tip on the opposite side of the handle portion,
Engaging the rotation fulcrum and the protrusion;
Rotating the manual brake release tool about the rotation fulcrum and engaging the wedge portion with the manual release pin;
A method for manually releasing a brake for an elevator hoisting machine, comprising the step of releasing the brake by applying a rotational force around the rotation fulcrum to the manual brake release tool by the handle portion. 6. The elevator hoisting machine according to claim 4 or 5, further comprising a step of rotating or reversing the manual brake releasing device by the handle portion and repeatedly applying brake releasing force and braking force. Manual brake release method.

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