JP2000177956A - Disk brake for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the failure of a disk brake caused by the abrasive powder of a lining. SOLUTION: In an elevator disk brake for pressing an armature 29 to a disk 23 side from a frame 21 side or releasing it, in a very small gap portion 28 between the frame 21 and the armature 29, a gap is widened by providing a level difference from the outer peripheral part of the frame or the armature, alternatively the very small gap portion is covered with an O ring or a cover, otherwise a fin is provided in a gap between the frame 21 and a shaft 30. Thus, the incursion and deposition of abrasive powder in the very small gap between the frame 21 and the armature 29 are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake for an elevator which holds a car at rest when the elevator is stopped or a power failure occurs.

[0002]

2. Description of the Related Art FIG. 9 shows a schematic structure of a general rope type elevator, FIG. 9 (a) is a front view of the entire rope type elevator, and FIG. 9 (b) is a hoist. It is a top view of four parts. First, the rope type elevator will be described with reference to FIG. The elevator car 1 and the counterweight 2 are connected by a rope 3, and the hoisting machine 4 hoists the rope 3 and rewinds the car 1 and the counterweight 2 in a lifting manner. The hoisting machine 4 includes a motor 6 that is driven to rotate by a command from the control device 5, and a speed reducer 7 that is connected to a shaft of the motor 6 and that obtains torque by reducing its rotation speed.
And a sheave 8 for transmitting the driving force through the speed reducer 7 and transmitting the driving force by traction to the rope 3 by rotating forward and backward, and stopping the car 1 at the time of stopping the elevator or at the time of a power failure. It has a disc brake 9 for holding it in a released state.

[0003] A conventional disc brake 9 for holding an elevator at rest has a structure as shown in a sectional view in FIG. That is, the shaft of the motor 6, that is, the drive source of the elevator, is connected to the drive shaft 30 of the elevator.
Through the wall of the speed reducer 7 constituting the disk brake 9
The frame 21 is loosely inserted and extends. A boss 31 is fitted to the drive shaft 30, and a disk 23 having linings 22 attached to both surfaces thereof is attached to the boss 31 by spline engagement. The frame 21 of the disc brake 9 is formed, for example, concentrically so as to surround the drive shaft 30, and some support members 24 are implanted in the vicinity of the outer peripheral edge thereof. Is extended.

[0004] A disk-shaped armature 29 is movably engaged with the support member 24 so as to have a small gap 28 with respect to the surface of the frame 21 and to lightly slide against one lining 22 of the disk 23. Have been. It is needless to say that the center of the armature 29 escapes the boss 31. Further, a disk-shaped plate 25 is fixed to the support member 24 so as to lightly contact the other lining 22 of the disk 23. Therefore, the disk 23 is provided so as to be sandwiched between the plate 25 and the armature 29. The coil 21 is provided on the frame 21, and when the coil 20 is energized, the frame 21 is magnetized, and the magnetic flux 27 generated thereby acts on the armature 29, so that the armature 29 is attracted to the frame 21 side. . Further, a spring 26 is provided on the frame 21 so that the armature 2 can be turned off when the coil 20 is not energized.
9 is strongly applied to the disk 23.

Therefore, during normal operation of the elevator,
When the coil 20 is energized, the armature 29 is attracted to the frame 21 by overcoming the pressing force of the spring 26, and a gap is formed between the armature 29 and the disk 23, so that the disk 23 becomes free in the thrust direction and rotates. The car 1 can be raised and lowered by driving the motor 6. On the other hand, when the coil 20 is not energized, the armature 29 is pressed against the disk 23 by the force of the spring 26. At this time, since the plate 25 is fixed so as not to be displaced by the support member 24 protruding from the frame 21, the disk 23 is sandwiched between the armature 29 and the plate 25 by the force of the spring 26, and the armature 29, the disk 23 and the disk Drive shaft 30 between plate 23 and plate 25
A frictional force that overcomes the rotational torque of the drive shaft 3
0 rotation is prevented. In other words, the car 1 can be kept stationary by the force of the spring 26 when the elevator stops or when a power failure occurs. FIG. 10 shows the state at this time.

[0006]

In the conventional disk brake 9 as described above, the linings 22 provided on both sides of the disk 23 can be mounted on the armature 29 even when the armature 29 is sucked toward the frame 21. 2
9 and the plate 25. Therefore, the disk 23 rotates together with the drive shaft 30, and a small amount of wear occurs at the contact portion of the lining 22. Most of the wear powder 10 of the lining 22 is
The abrasion powder 10 is discharged out of the main body of the disc brake 9, and as shown in FIG.
And between the plate 25 and the armature 29, between the inside of the armature 29 and the drive shaft 30, and into the minute gap 28 between the frame 21 and the armature 29, accumulates and accumulates here. May be small.

In this case, since the amount of movement of the armature 29 when the armature 29 is sucked toward the frame 21 is reduced, the gap between the armature 29 and the disk 23 and between the disk 23 and the plate 25 is reduced, and the lining is reduced. There was a problem that the wear of No. 22 increased. In the worst case, armature 29 and plate 25
Since the drive shaft 30 continues to rotate while holding the disk 23, there is a danger that the sliding portion with the lining 22 will wear and generate heat, and the heat will cause smoke to cause a serious accident. Further, as the wear progresses, the pressing force of the spring 26 may be reduced, and the function as a holding brake may be reduced. The present invention has been made to solve such a problem.

[0008]

Means for Solving the Problems Claim 1 of the present invention.
The invention described in the above, a frame into which the drive shaft of the elevator is loosely inserted, an armature provided to have a minute gap with respect to the surface of the frame, and engaged with a support member extending from the frame, A plate fixed to the support member and positioned so as to be opposed to the other surface of the armature is provided so as to be sandwiched between the plate and the armature, and a central portion is provided on a drive shaft of the elevator. In an elevator disc brake having a fitted disc and pressing means for pressing or releasing the armature against the disc from the frame side, a gap between the frame and the armature is formed by an outer peripheral portion of the frame or the armature. That the part reaching the mounting part of the support member from above is made wide It is an feature.

[0009] Thus, the wear powder of the lining, which invades from the mounting portion of the support member, drops from the outer peripheral portion between the frame and the armature, and the wear powder accumulates in the minute gap between the frame and the armature. Can be prevented.

According to a second aspect of the present invention, there is provided a frame in which a drive shaft of an elevator is loosely inserted, and a support member provided so as to have a minute gap with respect to a surface of the frame, and extending from the frame. An armature engaged with a plate positioned opposite to the other surface of the armature and fixed to the support member;
A disk provided so as to be sandwiched between the plate and the armature, a central portion of which is fitted to a drive shaft of the elevator; and a pressure for pressing or releasing the armature from the frame side to the disk. Means, wherein an air blowing means is provided in a gap between the drive shaft and the frame.

[0011] This allows the wear powder of the lining to be positively discharged out of the disc brake in accordance with the rotation of the drive shaft, and prevents the wear powder from accumulating in the minute gap between the frame and the armature. Can be prevented.

According to a third aspect of the present invention, there is provided a frame into which a drive shaft of an elevator is loosely inserted, and a support member provided so as to have a minute gap with respect to a surface of the frame, and extending from the frame. An armature engaged with a plate positioned opposite to the other surface of the armature and fixed to the support member;
A disk provided so as to be sandwiched between the plate and the armature, a central portion of which is fitted to a drive shaft of the elevator; and a pressure for pressing or releasing the armature from the frame side to the disk. Means for an elevator disc brake having means, at least one of an outer peripheral side or an inner peripheral side of a surface facing the frame and the armature, wherein an elastic body is interposed so as to close a minute gap therebetween. It is a feature.

[0013] Thus, it is possible to prevent the wear powder of the lining from entering from the mounting portion of the support member, and to prevent the build-up of the wear powder in the minute gap between the frame and the armature.

According to a fourth aspect of the present invention, there is provided a frame in which a drive shaft of an elevator is loosely inserted, and a support member provided so as to have a small gap with respect to a surface of the frame, and extending from the frame. An armature engaged with a plate positioned opposite to the other surface of the armature and fixed to the support member;
A disk provided so as to be sandwiched between the plate and the armature, a central portion of which is fitted to a drive shaft of the elevator; and a pressure for pressing or releasing the armature from the frame side to the disk. Means for covering at least one of an outer peripheral portion and an inner peripheral portion between the frame and the armature with a cover made of a material having flexibility so as not to hinder the movement of the armature. It is characterized by having.

[0015] This also prevents wear powder of the lining from entering from the mounting portion of the support member, and prevents wear powder from accumulating in the minute gap between the frame and the armature.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of an elevator disc brake according to the present invention will be described below in detail with reference to FIGS. In these figures, the same parts as those in FIGS. 9 to 11 are denoted by the same reference numerals, and the description of those parts will be omitted.

FIGS. 1A and 1B show the internal structure of an elevator disc brake according to the present invention, wherein FIG. 1A is a front view as viewed from the plate side, and FIG. 1B is a line XX of FIG. 11 is a cross-sectional view similar to FIG. 10 described as a conventional example. The elevator disk brake according to the present invention is characterized by portions A and B surrounded by a dotted line in FIG. 1 (b). The configuration, operation and effect will be described.

First, in the first embodiment, FIG.
As shown in an enlarged view of the portion A in FIG. 2B, a step 21a is provided at a portion extending from the outer peripheral portion of the frame 21 to the root portion of the mounting portion of the support member 24.
The minute gap 28 formed between the surface 1 and the surface of the armature 29 facing this surface is configured to be widened by the step 21a. With this configuration, when the drive shaft 30 rotates, abrasion powder generated at the contact portion between the lining 22 and the plate 25 and at the contact portion between the lining 22 and the armature 29 is generated by the support member 24 during suction and release of the armature 29. Even if the powder enters through the gap with the armature 29, the wear powder will
Since it is taken out of the gap between the armature 29 and the frame 21 which has been widened by 1a, accumulation of wear powder in the minute gap 28 is prevented.

In this case, as shown in a second embodiment in FIG. 3, an armature 29 facing the surface of the frame 21 is provided.
On the side surface, a step 29a can be provided in a portion reaching from the outer peripheral portion of the armature 29 to the engagement portion of the support member 24. Thereby, the minute gap 28 formed between the surface of the frame 21 and the surface of the armature 29 opposed to this surface is configured to be widened by the step 29a, and the abrasion powder is sucked and released by the armature 29. Sometimes, even if it enters through the gap between the support member 24 and the armature 29, as in the first embodiment, the abrasion powder removes the step 2.
Since it is taken out from the gap between the armature 29 and the frame 21 which has been widened by 9a, accumulation of wear powder in the minute gap 28 is prevented.

In the above embodiment, the step is formed at a right angle. However, the same effect can be obtained even if the interval is increased by forming an inclined surface, and the step is formed on the opposing surfaces of the frame 21 and the armature 29. You can also.

FIG. 4 shows a third embodiment in which a portion B of FIG. 1B is enlarged. A ventilation means such as a fin 40 is provided in a gap 32 formed between the drive shaft 30 or the boss 31 and the frame 21. The fins 40 are fixed to the drive shaft 30 or the boss 31 and rotate together with the drive shaft 30 or the boss 31.
Or, it may rotate independently of the boss 31. With this configuration, the abrasion powder generated from the lining 22 when the elevator is lifted and lowered with the fins 40 is positively discharged out of the disc brake by the wind generated by the fins 40 as the drive shaft 30 rotates. be able to. If the fins 40 are independently rotated, the abrasion powder can be discharged to the outside even when the drive shaft 30 is stopped.

FIG. 5 shows a fourth embodiment. The frame 21 on the opposite surface between the frame 21 and the armature 29
A groove is formed along the outer peripheral portion of the frame, and an elastic body 41 such as an O-ring is fitted into the groove so as not to change the width of the minute gap 28 between the frame 21 and the armature 29. The minute gap 28 is closed from the outer peripheral side. By doing so, when the coil 20 is not energized, the gap between the frame 21 and the armature 29 is closed from the outer peripheral side, and when the coil 20 is energized and the armature 29 is attracted, the elastic body 41 is closed.
Is crushed to suck the armature 29 toward the frame 21, so that the armature 29 and the frame 2 are
The wear particles are prevented from entering the minute gaps 28 between the two, and the accumulation of the wear particles in the minute gaps 28 is prevented. Note that the groove may be formed along the outer peripheral portion of the armature 29 facing the surface of the frame 21,
It may be formed along the outer periphery of both the armature 1 and the armature 29.

As shown in FIG. 6 according to a fifth embodiment, a groove is formed along the inner peripheral portion of the frame 21 on the surface where the frame 21 and the armature 29 face each other. An elastic body 42, such as an O-ring, is fitted so as not to change the width of the minute gap 28 with the armature 29 so as to close the minute gap 28 from the inner peripheral side. With this configuration, when the coil 20 is not energized, the inner circumferential gap between the frame 21 and the armature 29 is closed, and when the coil 20 is energized and the armature 29 is attracted,
Since the armature 29 is sucked toward the frame 21 by crushing the elastic body 42, the wear powder is prevented from entering the minute gap 28 between the armature 29 and the frame 21 from the inside, and the wear powder enters the minute gap 28. Accumulation is prevented. The groove may be formed along the inner periphery of the armature 29 facing the surface of the frame 21, or may be formed along the inner periphery of both the frame 21 and the armature 29. The elastic members 41 and 42 are connected to the frame 21.
And the armature 29 may be provided on both the inner peripheral side and the outer peripheral side.

FIG. 7 shows a sixth embodiment. The outer peripheral portion between the frame 21 and the armature 29 is
8 is covered with a cover 43 made of a material having flexibility so as to close the outer peripheral side and not to hinder the movement of the armature 29. By doing so, since the minute gap 28 is always covered with the cover 43, it is possible to prevent wear powder from entering the minute gap 28 between the armature 29 and the frame 21 from the outside, and Wear powder is prevented from accumulating.

In this case, as shown in a seventh embodiment in FIG. 8, the inner peripheral portion between the frame 21 and the armature 29 is closed so that the minute gap 28 is closed from the inner peripheral side, and the armature 29 is closed. It is covered with a cover 44 made of a material having flexibility so as not to hinder movement. By doing so, the minute gap 28 is always covered with the cover 44, so that wear powder is prevented from entering the minute gap 28 between the armature 29 and the frame 21 from the inside, and Wear powder is prevented from accumulating.

The covers 43 and 44 may be provided on both the outer peripheral side and the inner peripheral side between the frame 21 and the armature 29.

[0027]

As described above in detail, according to the elevator disc brake of the present invention, when the drive shaft rotates, abrasion powder generated by friction between the armature and the lining or between the lining and the plate is generated by the frame. To prevent intrusion into the minute gap between the armature and the armature, thereby preventing accumulation of wear powder in the minute gap.

Therefore, the minute gap is filled with the wear powder, and the amount of movement of the armature is reduced, and the sliding portion between the lining and the plate or the armature is accompanied by wear and heat generation, and the heat causes smoke to lead to a serious accident. Further, the problem that the pressing force of the spring is reduced due to the progress of wear and the function as the holding brake is reduced can be solved.

[Brief description of the drawings]

FIG. 1 is a front view and a sectional view showing an embodiment of an elevator disc brake according to the present invention.

FIG. 2 is an enlarged sectional view of a main part of the disc brake for explaining the first embodiment of the elevator disc brake according to the present invention.

FIG. 3 is an enlarged cross-sectional view of a main part for describing a second embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view of a main part for describing a third embodiment of the present invention.

FIG. 5 is an enlarged cross-sectional view of a main part for describing a fourth embodiment of the present invention.

FIG. 6 is an enlarged sectional view of a main part for describing a fifth embodiment of the present invention.

FIG. 7 is an enlarged sectional view of a main part for describing a sixth embodiment of the present invention.

FIG. 8 is an enlarged sectional view of a main part for explaining a seventh embodiment of the present invention.

FIG. 9 is an explanatory diagram showing a schematic configuration of a general rope type elevator.

FIG. 10 is a sectional view showing the structure of a conventional disc brake.

FIG. 11 is an explanatory diagram for explaining a generation / ingress route of wear powder in a conventional disc brake.

[Explanation of symbols]

 Reference Signs List 20 coil 21 frame 21a step 22 lining 23 disk 24 support member 25 plate 26 spring 28 micro gap 29 armature 30 drive shaft 31 boss

Claims (4)

[Claims] 1. A frame into which a drive shaft of an elevator is loosely inserted, an armature provided so as to have a minute gap with respect to a surface of the frame and engaged with a support member extending from the frame, A plate fixed to the support member and opposed to the other surface of the armature, and provided so as to be sandwiched between the plate and the armature, and a central portion fitted to a drive shaft of the elevator; Disc that is
In an elevator disc brake having pressing means for pressing or releasing the armature against the disc from the frame side, a gap between the frame and the armature is provided from an outer peripheral portion of the frame or the armature to a mounting portion of the support member. An elevator disc brake characterized by a wide reach. 2. A frame into which a drive shaft of an elevator is loosely inserted, an armature provided so as to have a minute gap with respect to a surface of the frame, and engaged with a support member extending from the frame. A plate fixed to the support member and opposed to the other surface of the armature, and provided so as to be sandwiched between the plate and the armature, and a central portion fitted to a drive shaft of the elevator; Disc that is
An elevator disc brake having pressing means for pressing or releasing the armature against the disk from the frame side, wherein an air blowing means is provided in a gap between the drive shaft and the frame. For disc brakes. 3. A frame into which a drive shaft of an elevator is loosely inserted, an armature provided so as to have a minute gap with respect to the surface of the frame, and engaged with a support member extending from the frame, A plate fixed to the support member and opposed to the other surface of the armature, and provided so as to be sandwiched between the plate and the armature, and a central portion fitted to a drive shaft of the elevator; Disc that is
In an elevator disc brake having a pressing means for pressing or releasing the armature from the frame side to the disc, at least one of an outer peripheral side or an inner peripheral side of a surface facing the frame and the armature, An elevator disc brake characterized in that an elastic body is interposed so as to close a minute gap between the two. 4. A frame into which a drive shaft of an elevator is loosely inserted, an armature provided so as to have a minute gap with respect to a surface of the frame, and engaged with a support member extending from the frame, A plate fixed to the support member and opposed to the other surface of the armature, and provided so as to be sandwiched between the plate and the armature, and a central portion fitted to a drive shaft of the elevator; Disc that is
In an elevator disc brake having pressing means for pressing or releasing the armature against the disc from the frame side, at least one of an outer peripheral portion and an inner peripheral portion between the frame and the armature is moved by the movement of the armature. An elevator disc brake characterized by being covered with a cover made of a material having flexibility so as not to hinder the operation.