JP3617771B2 - Elevator hoisting machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator hoisting machine, and more particularly to the structure of the brake device.
[0002]
[Prior art]
FIG. 5 is a partial cross-sectional front view showing the configuration of a conventional elevator hoisting machine disclosed in, for example, Japanese Patent Laid-Open No. 9-14276, and FIG. 6 is a partial cross-sectional view showing another configuration of the conventional elevator hoisting machine. FIG.
In the figure, 1 is a bed installed on a foundation, 2 and 3 are bearings fixedly attached to the bed 1 with a predetermined distance from each other, 4 is a shaft rotatably attached to the bearings 2 and 3, and 5 is a bearing. A sheave that is fitted to and integrally attached to the shaft 4 between 2 and 3, a brake disc 6 that extends radially outward on one side of the sheave 5 and has sliding surfaces formed on both sides; 7 Is a brake pad configured to be able to contact and separate from both sides in the axial direction with respect to the sliding surface of the brake disc 6, and is provided at two locations in the circumferential direction of the brake disc 6. 8 is a hydraulic or electromagnetic brake device as a brake drive device that drives and releases the brake pad 7 in the axial direction, and 9 is a rotor 10 fixed to the shaft 4 and a stator fixed to the bearing 3. Reference numeral 11 denotes a synchronous motor as a drive motor, and 12 denotes a body portion provided between the sheave 5 and the brake disk 6.
[0003]
Next, the operation will be described. First, the brake driving device 8 is released from the brake, and the sheave 5 is rotated by the operation of the drive motor 9, so that a lifting body such as a cage suspended by a rope (not shown) wound around the sheave 5 (see FIG. (Not shown) goes up and down.
Next, when stopping the elevating body, the drive motor 9 is stopped and the brake driving device 8 is operated in the braking direction at the same time, and the brake pad 7 is pressed against the sliding surface of the brake disk 6 to brake the brake disk 6. The hanging body is stopped at a predetermined position. According to this structure, since the brake disc 6 and the sheave are integrated, the axial length of the entire apparatus can be shortened.
[0004]
[Problems to be solved by the invention]
Since the conventional elevator hoisting machine is configured as described above, rope lubricating oil adheres to the sliding surface of the brake disc 6 on the sheave 5 side, and the friction coefficient of the sliding surface changes to change to a predetermined value. There was a problem that it was impossible to secure the brake torque. As a countermeasure, as shown in FIG. 6, a trunk portion 12 may be provided between the sheave 5 and the brake disk 6 to prevent adhesion of lubricating oil. However, in this configuration, the overall length of the device is long. There was a problem of becoming larger.
[0005]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator hoisting machine in which braking is effectively applied and the size can be reduced.
[0006]
[Means for Solving the Problems]
An elevator hoist according to claim 1 of the present invention includes a pair of bearings fixed to a bed, a rotating shaft provided between the bearings, a sheave supported by the rotating shaft, and the rope In an elevator hoist equipped with a brake device that brakes the rotation of a car, the brake device includes sliding surfaces formed on both side surfaces in the axial direction of the rotating shaft of the sheave, and the sliding surface. And a brake drive device having a brake pad configured to be able to contact and separate from both sides in the axial direction , and the brake drive device is held by a bearing .
[0007]
The elevator hoisting machine according to claim 2 of the present invention is the elevator hoisting machine according to claim 1, wherein the sliding surface is formed of a member that can be attached to and detached from the sheave.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings.
FIG. 1 shows a configuration of an elevator hoist according to Embodiment 1 of the present invention, (A) is a front view thereof, (B) is a side view thereof, and FIG. 2 is a cross-sectional view showing a configuration of a brake drive device. is there.
In the figure, 13 is a bed installed on a foundation, 14 and 15 are fixedly attached to the bed 13 at predetermined intervals, bearings 14a and 15a are provided with brake drive device holding frames 14a and 15a described later, and 16 is a bearing 14. , 15 is a shaft rotatably attached, 15 is a sheave having a sliding surface 17a, 17b formed on both sides in the axial direction integrally attached to a shaft 16 between the bearings 14, 15, 18 is a sliding surface 17a. , 17b are brake pads configured to be able to contact and separate from both sides in the axial direction, and are provided at two locations in the circumferential direction of the sliding surfaces 17a, 17b.
[0009]
Reference numeral 19 denotes a hydraulic brake device as a brake drive device for driving and releasing the brake by driving the brake pad 18 in the axial direction. As shown in FIG. 2, the drive shaft case is held by the holding frame 14a or 15a. 20, a drive shaft 21 formed so as to be slidable in the drive shaft case 20 in the axial direction and having a brake pad 18 fixed to an end thereof, and the drive shaft 21 slidably interposed between the drive shaft case 20 and the drive shaft 21. A pressure device that applies a hydraulic pressure to a space Q formed by the drive shaft case 20 and the drive shaft 21 and moves the drive shaft 21 in a direction opposite to the bias of the spring 22. 23 (equivalent to the prior art). A motor 24 is directly connected to the shaft 16 and drives the sheave 17.
[0010]
Next, the operation will be described. First, when the sheave 17 is rotated by the operation of the drive motor 24, a lifting body (not shown) suspended by a rope (not shown) wound around the sheave 17 moves up and down. While the drive motor 24 is in operation, the brake drive device 19 is released from braking and the brake pad 18 is separated from the sliding surfaces 17a and 17b. Next, when stopping the lifting body (not shown) of the lifting body (not shown), the drive motor 24 is stopped and the pressurization device 23 of the brake driving device 19 is released at the same time. As a result, the space Q in the drive shaft case 20 is depressurized and the drive shaft 21 is moved by the biasing force of the spring 22, and braking force is applied to the sliding surfaces 17 a and 17 b formed on both sides of the sheave 17 via the brake pad 18. And the elevator is stopped at a predetermined position.
[0011]
As described above, according to the first embodiment, the sliding surfaces 17a and 17b are formed on both sides of the sheave 17, and the brake pads 18 are contacted and separated from both sides in the axial direction with respect to the sliding surfaces 17a and 17b. Since it is configured to be possible, the sliding surface is not affected by the lubricating oil, the overall length can be shortened and the height can be reduced, and the apparatus can be miniaturized. Further, since the brake drive device 19 is held by the respective bearings 14 and 15, the brake drive device 19 is integrated with the bearings, so that the size can be reduced.
[0012]
In the first embodiment, the holding frames 14a and 15a for holding the brake drive device 19 are erected on the seats of the bearings 14 and 15, but are shown in FIGS. 3A and 3B. Thus, it goes without saying that the same effect can be obtained even when the bearings 25 and 26 are provided with holding frames 25a and 26a that protrude in the horizontal direction at right angles to the shafts and hold the brake drive device 19. Absent.
[0013]
Embodiment 2. FIG.
FIG. 4 is a cross-sectional view of the main part showing the structure of a sheave of an elevator hoist according to Embodiment 2 of the present invention.
In the figure, 27 is a sheave that is fitted to the shaft 16, and 28 is a sliding member made of, for example, a material FCD 500, which is fixed with attachment bolts 29 on both sides in the axial direction of the sheave 27 to form a sliding surface 30. .
[0014]
Next, the operation will be described. Generally, FCD ductile cast iron is used for elevator hoist sheaves, but a suitable hardness is selected according to the material of the rope used. For example, it is a soft E-type rope in relatively low-rise buildings. Is used, the sheave is made of FCD500 (Brinell hardness 180-200), and in the high-rise building, a hard type A rope is used, so the sheave is made of FCD600 (Brinell hardness 230-270). ) Is used. Such a difference in hardness results in a difference in the friction coefficient of the brake sliding surface. In particular, when the hardness is high, the friction coefficient may not be stable. Therefore, the material of the sliding surface may be unified to FCD500 having a relatively low hardness. desirable.
[0015]
Thus, according to the second embodiment, since the sliding surface 30 of the sheave is formed by the sliding member 28 that can be attached to and detached from the sheave 27, the sheave 27 is made of a different material. Even if it changes to, by using the same sliding member 28, since a friction coefficient is maintained constant, it becomes possible to stabilize a braking torque.
[0016]
【The invention's effect】
As described above, according to the first aspect of the present invention, the pair of bearings fixed to the bed, the rotating shaft provided between the bearings, the sheave supported by the rotating shaft, and the rope In an elevator hoist equipped with a brake device that brakes the rotation of a car, the brake device includes sliding surfaces formed on both side surfaces in the axial direction of the rotating shaft of the sheave, and the sliding surface. It is composed of a brake drive device having a brake pad that can be contacted and separated from both sides in the axial direction , and the brake drive device is held by a bearing . enables compact, the equipment can provide an elevator hoisting machine which can be downsized.
[0017]
According to claim 2 of the present invention, in claim 1, since the sliding surface is formed by a member that can be attached to and detached from the sheave, the same sliding is possible even if the sheave is made of a different material. It is possible to provide an elevator hoisting machine that can be made to be a surface and can maintain a constant braking coefficient because the coefficient of friction is kept constant.
[Brief description of the drawings]
FIG. 1 shows the configuration of an elevator hoist according to Embodiment 1 of the present invention, in which (A) is a front view thereof and (B) is a side view thereof.
FIG. 2 is a cross-sectional view showing a configuration of a brake drive device.
FIGS. 3A and 3B show a configuration of another embodiment of the first embodiment of the present invention, in which FIG. 3A is a front view thereof, and FIG. 3B is a side view thereof.
FIG. 4 is a cross-sectional view of a main part showing the structure of a sheave of an elevator hoist according to Embodiment 2 of the present invention.
FIG. 5 is a partially sectional front view showing a configuration of a conventional elevator hoisting machine.
FIG. 6 is a partially sectional front view showing another configuration of a conventional elevator hoisting machine.
[Explanation of symbols]
13 beds, 14, 15 bearings, 17 sheaves, 17a, 17b sliding surfaces,
18 brake pads, 19 brake drives, 27 sheaves,
28 sliding member, 30 sliding surface.

Claims (2)

For an elevator comprising a pair of bearings fixed to a bed, a rotating shaft provided between the bearings, a sheave supported by the rotating shaft, and a brake device for braking the rotation of the sheave in the hoisting machine, the brake device includes a sliding surface formed on both sides of the axial direction of the rotary shaft of the sheave, which is configured to be separable from the axial sides with respect to the sliding surface An elevator hoisting machine comprising: a brake drive device having a brake pad, wherein the brake drive device is held by the bearing . The elevator hoisting machine according to claim 1, wherein the sliding surface is formed of a member that is detachable from the sheave.

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