KR100824493B1 - Hoist for elevator - Google Patents

Abstract

In an elevator hoisting machine, rotation of the drive sheave is braked by the brake unit. The brake unit has a brake disc that is integrally rotated with the drive sheave and a brake body that brakes rotation of the brake disc by sandwiching the brake disc. The brake disc is disposed outside the radial direction of the drive sheave. In addition, the brake disc has first and second braking surfaces that face each other. The brake unit body has a first braking piece that is folded to the first braking surface, and a second braking piece that is folded to the second braking surface.

Description

Hoist for elevator {HOIST FOR ELEVATOR}

The present invention relates to an elevator hoist having a drive sheave in which a main rope is wound, a motor part for rotating the drive sheave, and a brake part for braking rotation of the drive sheave.

In a conventional elevator hoisting machine, an armature mounting portion and a drive sheave are integrally provided with a bowl-shaped body. The brake device for braking the rotation of the bowl-shaped body is arranged inside the bowl-shaped body. And the braking surface by which the braking piece of a brake apparatus is folded is formed in the inner periphery of bowl shape (for example, refer patent document 1).

Patent Document 1: Japanese Patent Application Laid-Open No. 2000-289954

Problems to be Solved by the Invention

However, in the above conventional elevator hoisting machine, since the brake device is disposed inside the bowl-shaped body and the braking radius is small, a large braking force is required for the brake device, and the brake device becomes large.

This invention is made | formed in order to solve the above subjects, and an object of this invention is to obtain the elevator hoisting machine which can aim at miniaturization of a brake main body.

Means for solving the problem

The hoist for elevator according to the present invention includes a base sheave, a main shaft provided on the base body, a drive sheave rotatable about the main shaft, a motor stator supported on the base body, and a motor rotor rotatable together with the drive sheave. And a motor portion for rotating the drive sheave, and a brake portion for braking rotation of the drive sheave, the brake portion being disposed radially outward of the drive sheave and having first and second braking surfaces facing each other, A brake disc that is integrally rotated with the drive sheave, a first braking piece that is folded to the first braking surface, and a second braking piece that is folded to the second braking surface, wherein the brake is provided by the first and second braking pieces. It has a brake part main body which brakes rotation of a brake disc by interposing a disc.

1 is a schematic side view showing an elevator apparatus according to Embodiment 1 of the present invention.

It is sectional drawing of the hoist for elevator of FIG.

Preferred Mode for Carrying Out the Invention

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of this invention is described with reference to drawings.

Embodiment 1.

1 is a schematic side view showing an elevator apparatus (elevator without a machine room) according to Embodiment 1 of the present invention. In the figure, the hoist 2 for elevators is provided in the lower part (pit) of the hoistway 1. As the elevator hoisting machine 2, a thin hoisting machine having a dimension in the axial direction smaller than the outer diameter in the direction perpendicular to the axial direction is used. The car 3 and the counterweight 4 raise and lower the inside of the hoistway 1 by the driving force of the hoist 2 for elevators.

Under the cage 3, a pair of cage suspension sheaves 5a and 5b are provided. The counterweight suspension sheave 6 is provided in the upper part of the counterweight 4. The car return sheave 7 and a pair of counterweight side return sheaves 8a and 8b are arrange | positioned at the upper part in the hoistway 1.

The car 3 and the counterweight 4 are suspended in the hoistway 1 by the main rope 9 of several pieces (only one is shown in figure). The rope end connection part 10 is fixed to the upper part in the hoistway 1. The main rope 9 has a first end 9a and a second end (not shown) connected to the rope end connecting portion 10.

The hoist 2 for elevators has the drive sheave 11 by which the main rope 9 was wound. The main rope 9 is in the order of the car suspension sheave 5a, the car suspension sheave 5b, the car side return sheave 7, the drive sheave 11, and the balance weight in order from the 1st end part 9a side. It is wound around the side return sheave 8a, the counterweight side return sheave 8b, and the counterweight suspension sheave 6. That is, the cage 3 and the counterweight 4 are suspended by the main rope 9 in a 2: 1 roping manner.

2 is a cross-sectional view of the elevator hoisting machine 2 of FIG. 1. In the figure, the metal base 12 has a leg 12a, a cylindrical stator mounting portion 12b, and a cylindrical spindle insert 12c provided on the mounting surface. The stator mounting part 12b and the main shaft insertion part 12c are arrange | positioned at the same axis mutually. The inner diameter and outer diameter of the stator mounting portion 12b are larger than the inner diameter and outer diameter of the main shaft insertion portion 12c.

The metal bowl-like rotating body 13 is rotatably supported by the base body 12. The bowl-shaped rotor 13 has a main shaft 13a serving as the center of rotation of the bowl-shaped rotor 13, a drive sheave 11, and a cylindrical rotor mounting portion 13b. That is, the main shaft 13a, the drive sheave 11, and the rotor mounting part 13b are integrally attached to the common bowl-shaped rotating body 13. Moreover, the main shaft 13a, the drive sheave 11, and the rotor mounting part 13b are arrange | positioned at the same axis | shaft.

The main shaft 13a is inserted into the main shaft inserting portion 12c from one side of the basic body 12. The inner circumferential surface of the drive sheave 11 faces the outer circumferential surface of the spindle insert 12c. That is, the main shaft 13a and the main shaft insertion part 12c are arrange | positioned inside the drive sheave 11. On the outer circumferential surface of the drive sheave 11, a plurality of rope grooves 11a into which the main rope 9 is inserted are provided.

The rotor mounting part 13b is provided adjacent to the other side of the drive sheave 11 with respect to the axial direction of the main shaft 13a. In addition, the inner diameter and outer diameter of the rotor mounting portion 13b are larger than the inner diameter and outer diameter of the drive sheave 11. The inner circumferential surface of the rotor mounting portion 13b faces the outer circumferential surface of the stator mounting portion 12b. That is, the stator mounting part 12b is surrounded by the rotor mounting part 13b.

The flange part 13c is provided between the drive sheave 11 and the rotor mounting part 13b. 13 d of disk installation parts (step | steps) are provided in the flange part 13c. The edge part of the rotor installation part 13b side of the bowl-shaped rotating body 13 is opening.

A plurality of bearings 14 are interposed between the outer circumferential surface of the main shaft 13a and the inner circumferential surface of the main shaft insertion portion 12c at intervals from each other in the axial direction of the main shaft 13a. Thereby, the main shaft 13a is rotatably supported with respect to the main shaft insertion part 12c.

The motor stator 15 is provided on the outer circumferential surface of the stator mounting portion 12b. That is, the motor stator 15 is supported by the base 12. On the inner circumferential surface of the rotor mounting portion 13b, a motor rotor 16 facing the motor stator 15 is provided. That is, the motor rotor 16 can rotate with the bowl-shaped rotor 13. The motor part 17 has the motor stator 15 and the motor rotor 16, and the driving force which rotates the bowl-shaped rotor 13 around the main shaft 13a generate | occur | produces.

The round annular brake disk 18 is fixed to the disk mounting portion 13d. The brake disc 18 is disposed radially outward of the drive sheave 11 and rotates integrally with the drive sheave 11. The brake disc 18 has first and second braking surfaces 18a and 18b facing each other. The first and second braking surfaces 18a and 18b are parallel to the plane orthogonal to the axis of the main axis 13a.

The brake support frame 19 is being fixed to the upper part of the base 12. The brake unit main body 20 is mounted on the brake support frame 19. The brake part main body 20 has the 1st braking piece 21 which is folded by the 1st braking surface 18a, and the 2nd braking piece 22 which is folded by the 2nd braking surface 18b. Moreover, the brake part main body 20 brakes rotation of the brake disc 18 and the drive sheave 11 by interposing the brake disc 18 by the 1st and 2nd braking pieces 21 and 22. FIG. do. The brake unit 23 has a brake disc 18 and a brake unit body 20.

As the brake unit main body 20, for example, an electromagnetic brake device is used. In the electromagnetic brake device, the first and second braking pieces 21, 22 are pressed against the first and second braking surfaces 18a, 18b by the spring force of the braking spring (not shown), and the brake disc 18 Rotation is braked. Moreover, by exciting an electromagnet (not shown), the 1st and 2nd braking pieces 21 and 22 are opened from the braking surfaces 18a and 18b in reverse to a braking spring, and braking Is released.

The basic body 12 is supported by a rotation detector, for example, an encoder 24, for detecting rotation of the main shaft 13a. The encoder 24 is attached to the base body 12 via the mounting leaf spring 25. The proximal end of the mounting leaf spring 25 is fixed to the other end of the spindle insert 12c. The base 12 is provided with an opening 12d that exposes the encoder 24 on the side opposite to the main shaft 13a. In addition, the encoder 24 generates a signal corresponding to the rotational speed of the drive sheave 11. The signal from the encoder 24 is sent to a control device (not shown) that controls the operation of the elevator hoisting machine 2.

In such an elevator hoist 2, the rotation of the brake disc 18 and the drive sheave 11 are braked by sandwiching the brake disc 18 with the first and second braking pieces 21, 22. Therefore, compared with the case where the braking piece is pressurized only on one side of the brake disc, about twice as much braking force can be obtained, and the brake main body 20 can be downsized.

Moreover, the brake part main body 20 has the brake disc 18 arrange | positioned in the radial direction outer side of the drive sheave 11 between, and compared with the case where a brake part main body is arrange | positioned inside a drive sheave, a braking radius The size of the brake unit main body 20 can be reduced.

Moreover, since the brake disc 18 and the brake part main body 20 are arrange | positioned outside the bowl-shaped rotating body 13, the assembly work of the brake part main body 20, the brake part main body 20, and the brake disc (18) Maintenance and inspection work is easy. For example, it is easy to adjust the gap between the braking surfaces 18a and 18b and the braking pieces 21 and 22, to confirm the gap, and the like.

Moreover, since the main shaft 13a, the drive sheave 11, and the rotor mounting part 13b are integrally provided in the common bowl-shaped rotating body 13, the axial dimension of the whole elevator hoisting machine 2 is carried out. Can be made small.

Moreover, since the main shaft 13a rotates with the drive sheave 11, the encoder 24 can be installed in the base body 12 only by the mounting leaf spring 25, and the encoder 24 to the base body 12 is carried out. Desorption is easy. For this reason, installation and maintenance of the encoder 24 are easy.

In addition, although the brake disc 18 is comprised separately from the bowl-shaped rotating body 13 in the said example, you may provide a brake disk integrally with the bowl-shaped rotating body.

In the above example, the elevator hoisting machine 2 is provided so that the main shaft 13a becomes horizontal. Alternatively, the elevator hoisting machine 2 may be provided and used so that the main shaft 13a becomes vertical or approximately vertical. .

In addition, in the above example, although the elevator hoisting machine 2 is provided in the lower part in the hoistway 1, the installation place of the elevator hoisting machine of this invention is not limited to this. For example, it can also be installed in the upper part of the hoistway 1, or in the machine room on the hoistway 1. As shown in FIG.

In addition, in the above example, the car 2 and the balance weight 3 are suspended in a 2: 1 roping system, but the roping system is not limited thereto, for example, a car in the 2: 1 roping system ( 2) may be sufficient.

In addition, a steel rope may be used as the main rope, but a resin-coated rope in which an outer layer covering made of a high friction resin material is provided on the outer periphery may be used, and the diameters of the driving sheave, return sheave and suspension sheave Can be made small, and space saving in the hoistway can be achieved.

In the above example, the main shaft 13a is used as the rotating shaft, but the main shaft can be the fixed shaft and the drive sheave can be rotated with respect to the main shaft.

In addition, the number of brake body bodies may be one or plural. That is, you may arrange | position a some brake part main body on the circumference of one brake disc.

Thus, this invention can be utilized for the elevator hoist which has the drive sheave by which the main rope is wound, the motor part which rotates a drive sheave, and the brake part which brakes rotation of a drive sheave.

Claims (3)

Primitive, A main shaft installed on the base body, A drive sheave rotatable about the main shaft, A motor part having a motor stator supported on the base body, a motor rotor rotatable together with the drive sheave, and rotating the drive sheave; Brake unit for braking the rotation of the drive sheave And The brake unit, A brake disc disposed radially outward of the drive sheave and having first and second braking surfaces facing each other, the brake disc being integrally rotated with the drive sheave; And a first braking piece that is folded to the first braking surface, and a second braking piece that is folded to the second braking surface, wherein the brake disc is sandwiched between the first and second braking pieces. By having a brake part body for braking the rotation of the brake disc, The basic body has a cylindrical stator mounting portion and a cylindrical spindle insertion portion, a main shaft is inserted into the spindle insertion portion, and a rotation detector for detecting rotation of the spindle is disposed inside the stator mounting portion, on the opposite side to the main shaft. An elevator hoisting machine in which an opening for exposing a rotation detector is formed in a basic body. The method of claim 1, An elevator hoisting machine in which a rotor mounting portion, said main shaft, and said drive sheave in which said motor rotor is installed, are integrally provided in a common bowl-shaped rotating body. The method of claim 2, The brake disc is provided between the drive sheave of the bowl-shaped rotor and the rotor mounting portion, and the first and second braking surfaces are parallel to a plane orthogonal to the axis of the main axis. Hoist for elevator.

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