JP2000072345A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply make a detecting device coincide with a magnetic pole of a permanent magnet type synchronous motor even after a hoist is installed. SOLUTION: An elevator device includes a stator supported by a fixing frame 20, a permanent magnet type motor arranged on the outer periphery of the stator via a peripheral gap and having a rotor rotatably supported on a fixed shaft 21 fixed to the fixing frame 20 and a hoist having a traction sheave rotating together with the rotor. A detecting device containing at least a detector 29b for detecting the position of a magnetic pole of the permanent magnet type motor is provided in the fixed shaft 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator apparatus, and more particularly, to an elevator apparatus using a synchronous motor using a permanent magnet as a motor of a hoist, and having a detecting device for detecting a magnetic pole position of the synchronous motor. About.

[0002]

2. Description of the Related Art A synchronous motor is installed in an elevator shaft.
In particular, using a permanent magnet motor to install a thin hoist,
An elevator device configured to use a hoisting rope for raising and lowering a car on a traction sheave of the hoist so as to effectively use the entire space of the building has been proposed and is being put into practical use.

In the case of a synchronous motor using a permanent magnet, it is necessary to detect the position of the magnetic pole, for example, as described in "Introduction to Servo Technology for Mechatronics" (Effective date: Showa 61)
, October 30, 2013, issuance office: Nikkan Kogyo Shimbun) "Figure 5.1 Control block diagram of SM type AC servo" on page 81
It is described in. Also, see “Fig. 2.2” on page 57 of the same book.
As shown in "Comparison of servo motor (2)", the detection device is mounted on the non-load side. The detection device has a Z phase for detecting the position of the magnetic pole, and an A phase and a B phase for detecting the rotation speed and the rotation direction.

[0004]

In order to effectively use the elevator shaft, the anti-load side of the motor is on the elevator shaft side, so it is necessary to mount a magnetic pole detection device on the load side. If the replacement of the magnetic pole detection device is to be performed later, there is a problem that it is difficult to accurately adjust the magnetic pole detection device to the position of the magnetic pole of the permanent magnet type synchronous motor because the operation is performed in a narrow space.

[0005] It is an object of the present invention to provide an elevator apparatus that can easily adjust the detection device to the position of the magnetic pole of the permanent magnet synchronous motor even after the hoist is installed.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a stator supported by a fixed frame, which is disposed on the outer periphery of the stator with a circumferential gap, and is fixed to the fixed frame. A permanent magnet motor having a rotor rotatably supported on a fixed shaft and a hoisting machine having a traction sheave that rotates integrally with the rotor. At least a detecting device including a detector for detecting a magnetic pole position of the permanent magnet type electric motor is provided.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an elevator apparatus according to the present invention will be described below with reference to FIGS.

A car 1 and a counterweight 2 are suspended by a hoisting rope 3. The car 1 is provided with a hoisting rope 3 on a pair of turning pulleys 4a, 4b pivotally supported at a lower portion thereof.
Is hung by being wound around. Hoisting rope 3
Is suspended by winding a hoisting rope 3 around a diverting pulley 5 pivotally supported on the upper part thereof. A hoisting machine 6 having a traction sheave 7 around which the hoisting rope 3 is wound is arranged at the top of the elevator shaft.

The car 1 and the counterweight 2 run on the elevator shaft along the car guide rails 8a and 8b and the counterweight guide rails 9a and 9b for guiding them. Each guide rail 8a, 8b, 9
a, 9b are supported by guide rail supports against the walls or building beams of the elevator shaft (not shown).

The hoisting rope 3 is wound as follows. One end of the hoisting rope is fixed by a fixing means 12 to a machine base 10 provided on the uppermost part of the elevator shaft. Rope 3 from fixing means 12
Extends downward and descends until it meets the deflecting pulley 5 of the counterweight 2. When the hoisting rope 3 is wound around the diverting pulley 5, the hoisting rope 3 rises again to the hoisting machine 6 side, is wound around the traction sheave 7, and descends to the car 1 side. It is raised and fixed to the uppermost fixing means (not shown) of the car guide rail 8a via the pulley 4.

Counterweight guide rails 9a, 9
The machine base 10 is mounted and fixed to the upper end of the b. The hoisting machine 6 and the fixing means 12 at one end of the rope 3 are attached and fixed to the machine base 10, and the vertical loads are maintained.

Hoisting machine 6 and elevator shaft wall 14
Is extremely small, and when the hoisting rope 3 is hung on the traction sheave 7, it is impossible to replace the parts on the back side of the hoisting machine 6.

Next, the configuration of the hoisting machine 6 will be described. The traction sheave 7 is fixed to the rotating body 22 by bolts 26a and 26b. A fixed shaft 21 is cantilevered to a base structure 20 which is a fixed frame of the hoisting machine 6. The rotating body 22 is provided with bearings 27a, 2
It is rotatably supported via 7b.

The rotating body 22 has a peripheral wall concentric with the fixed shaft 21, and a plurality of permanent magnets 23a
Are fixed to form a rotor. A stator is arranged on the inner diameter side of the rotor with a small clearance in the circumferential direction.

This stator has a fixed core 24a fixed to the base structure 20 by bolts 25, and a fixed winding 24b wound around the stator core 24a.

On the other hand, a space 21a is provided on the free end side of the fixed shaft 21, and a detector 29b is housed inside. The position signal Z of the magnetic pole from the detector 29b and the rotation output signals A phase and B phase are output from the output line 30a and the connector 31.
a, 31b and the output line 30b.
It is output to the upper terminal block 33.

The detector 29b is fixed to the detector fixing plate 30 by a support fitting 29c. Also, the detector 29
The rotation shaft 29a of b is fixed to the detector shaft fixing plate 28. The detector fixing plate 30 includes guide pins 32a, 3
2b, the detector shaft is fixed to the opening of the space 21a of the fixed shaft 21.
It is fixed to the rotating body 22 by 1a and 31b.

Guide pins 31a, 31b, 32a, 32
b is for centering, and a fixing bolt (not shown)
It is provided separately. Since the length of each guide pin is for centering, it is about 3 to 5 mm from the surface of the fixed shaft 21 and the rotating body 22 in the axial direction.

FIG. 4 shows a permanent magnet 23a and a fixed iron core 24a.
And the relationship between the guide pins 31a, 31b, 32a, and 32b. Permanent magnet 23a, fixed iron core 2 on Y axis
4a and guide pins 31a, 31b, 32a, 32
The insertion hole of b is located.

FIGS. 5 and 6 show the detector 29b, the detector fixing plate 30, the detector shaft fixing plate 28, and the guide pin insertion holes 3 respectively.
The positional relationship between 1a1, 31b1, 32a1, 32b1 and fixing bolt holes 31c, 31d, 32c, 32d is shown.
A guide pin insertion hole 32 of the detector fixing plate 30 is provided on the Y axis.
a1, 32b1 and guide pin insertion holes 31a1, 31b1 of the detector shaft fixing plate 28. The detector shaft fixing plate 28 has four mounting holes 32e.

On the X-axis, there are fixing bolt holes 32c and 32d of the detector fixing plate 30.
A fixing bolt (not shown) is passed through c and 32d, and is fixed to tap holes 32e and 32f (FIG. 7) at the end of the fixed shaft 21.
The detector shaft fixing plate 28 also has fixing bolt holes 31c,
A fixing bolt (not shown) is passed through the fixing bolt holes 31c and 31d, and is fixed to tap holes 31e and 31f (FIG. 7) on the side surface of the rotating body 22.

The detector 29b has an output line 30a to which a connector 31a is connected.
A connector 31b is connected to the end of the external output line 30b. The connectors 31a and 31b are connected in the space 21a of the fixed shaft 21.

The detector 29b provided with the output line 30a and the connector 31a is connected to the detector fixing plate 3 by a support fitting 29c.
It is fixed to 0. Detector 29 is attached to detector shaft fixing plate 28
5b, the guide pin holes 31a1, 31b1, 32a1, and 32b are provided on the Y-axis as shown in FIG.
When the position 1 is located, the shaft 29a is adjusted and fixed to the detector shaft fixing plate 28 so that the signal of the magnetic pole detector is generated.

At the time of assembling the hoisting machine 6, the detecting device 40 integrating the above-mentioned parts is connected to the guide pins 31a, 31b, 3
It is fixed to the fixed shaft 21 and the rotating body 22 using 2a and 32b. 1, the guide pins 31a, 31b, 32a, 32 of the rotating body 22 and the fixed shaft 21 viewed from the direction A.
FIG. 7 shows the positional relationship between b and the tap holes 31e, 31f, 32e, 32f. Guide pins 31a, 31 are provided on the Y axis.
b, 32a and 32b, and a tapped hole 31 on the X-axis.
e, 31f, 32e and 32f are open. After installing the hoist 6 on the elevator shaft, the detector 21b
If it is necessary to replace the fixed detector 21 with the hoisting machine 6, the failed detector 40 is removed and the normal detector 40 is connected to the fixed shaft 21 and the rotating body using the guide pins 31a, 31b, 32a and 32b. 2 and connectors 31a and 32b
Can be restored by connecting to the server, so that the operation is simple.

[0025]

According to the present invention, it is possible to obtain an elevator apparatus which can easily adjust the detecting device to the position of the magnetic pole of the permanent magnet type synchronous motor even after the hoist is installed.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a hoist used in an elevator apparatus according to the present invention.

FIG. 2 is a perspective view of an essential part showing an outline of an elevator apparatus according to the present invention.

FIG. 3 is a front view showing the car and the counterweight of FIG. 2;

FIG. 4 is an explanatory diagram showing a positional relationship between a magnetic pole position and a detector mounting guide pin.

FIG. 5 is an explanatory diagram showing a positional relationship between a guide pin and a mounting hole of the detection device.

FIG. 6 is a side view showing an outline of a detection device.

FIG. 7 is an explanatory view showing the relationship between a rotating body, guide pins of a fixed shaft, and mounting tap holes.

[Explanation of symbols]

1 ... basket, 2 ... counterweight, 6 ... hoisting machine, 7
... traction sheave, 21 ... fixed shaft, 21a ... space,
Reference numeral 22: rotating body, 23a: permanent magnet, 28: detector shaft fixing plate, 29a: rotating shaft, 29b: detector, 30: detector fixing plate, 40: detecting device.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hideki Nihei 1070 Ma, Hitachinaka-shi, Ibaraki F-term in Mito Plant, Hitachi, Ltd.F-term (reference) FF01

Claims (4)

[Claims] 1. A stator supported by a fixed frame, and a rotor disposed on an outer periphery of the stator with a circumferential gap therebetween and rotatably supported by a fixed shaft fixed to the fixed frame. In an elevator apparatus provided with a hoist having a permanent magnet electric motor and a traction sheave rotating integrally with the rotor, a detector for detecting at least a magnetic pole position of the permanent magnet electric motor in the fixed shaft is provided. An elevator device characterized by comprising a detection device including: 2. The elevator according to claim 1, wherein the detection device has a first fixing member fixing the detector and a second fixing member fixing the axis of the detector. apparatus. 3. The elevator according to claim 2, wherein the detection device outputs a magnetic pole position when the first fixing member and the second fixing member are at predetermined positions. apparatus. 4. A stator supported by a fixed frame, and a rotor disposed on the outer periphery of the stator with a circumferential gap therebetween and rotatably supported by a fixed shaft fixed to the fixed frame. In an elevator apparatus provided with a hoist having a permanent magnet electric motor and a traction sheave rotating integrally with the rotor, a detector for detecting at least a magnetic pole position of the permanent magnet electric motor in the fixed shaft is provided. A first fixing member for fixing the detector to a rotating portion of the permanent magnet type electric motor, and a second fixing member for fixing the axis of the detector to the fixed shaft. And when the first and second anchors are in place,
An elevator apparatus, wherein the detection device is configured to output a magnetic pole position of the permanent magnet type electric motor.