JPH0417869B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an elevator drive device, and particularly to an elevator drive device that is most suitable for a drum type elevator.

[Background of the invention]

Generally, a so-called winding trunk type elevator, in which a winding trunk is installed at the bottom of the hoistway and a main rope is wound and unwound around this winding trunk to raise and lower the car, is constructed as shown in Figures 1 and 2. . A guide rail 3 is installed in a hoistway 1 that is adjacent to or integrated with a building 2, and a car 4 is guided to the guide rail 3 in the ascending and descending direction via a guide device 5. This car 4 is suspended by a main rope 6, and this main rope 6
is wound around a guide pulley 7 attached to the shaft wall, and is then wound around a drive device 8 installed at the bottom of the shaft. This drive device 8 includes a winding drum 9 around which the main rope 6 is wound, a driving electric motor 11 that drives this winding drum 9 via a speed reduction device 10, and this driving electric motor 1.
1 and a braking device 12 disposed around the rotating shaft between the reduction gear devices 10.

Due to the above configuration, the following problems arose. That is, in order to make the hoistway 1 almost the same height as the building 2, the drive device 8 has the following functions:
Although it is installed at the bottom of the hoistway 1, it has the disadvantage that it is easily flooded by rainwater. In particular, the electric motor 11 that drives the winding drum 9 may stop functioning if it is submerged in water, making it difficult to take countermeasures to ensure safe operation of the elevator. As a countermeasure against flooding, there is a method that detects the amount of water intrusion and stops the operation of the elevator, but this merely automatically stops the operation of the elevator and cannot be called a drastic countermeasure.

[Purpose of the invention]

The present invention has been made in view of the above points, and its object is to provide an elevator drive device that allows the elevator to operate safely even if there is some degree of flooding.

[Summary of the invention]

The present invention has been made to achieve the above object, and includes a winding drum for raising and lowering a car in a hoistway by winding and unwinding a main rope, and a winding drum that is rotationally driven via a speed reduction mechanism. a driving electric motor;
In an elevator drive device that is installed at the bottom of the hoistway and includes a braking device that stops the rotation of the drive motor, the drive motor is arranged so that its rotation axis is in the vertical direction. , and the drive motor itself is located at the top of the elevator drive device.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. The winding drum 9 is fitted onto a rotating shaft 13, and a large gear 14 is also fitted onto the rotating shaft 13. Further, a rotating shaft 15 is arranged parallel to the rotating shaft 13, and the large gear 1 is connected to the rotating shaft 15.
A small gear 16 and a worm wheel 17 that mesh with 4 are fitted. On the other hand, a rotating shaft 18 that is perpendicular to the rotating shaft 15 is positioned adjacent to the rotating shaft 15, and a worm gear 19 that meshes with the worm wheel 17 is provided. This rotating shaft 18 is arranged vertically in a positional relationship that is perpendicular to the rotating shaft 15, and the lower end of the rotating shaft 20 of the driving electric motor 11 is opposed to the extension of its upper end.

The rotating shafts 13, 15, 18 each have a bearing 21a.
23a and 21b and 23b, and is rotatably supported by the large gear 14 and the small gear 1.
6. The worm wheel 17 and the worm gear 19 are housed in one space formed by the gear cases 24 and 25. The gear case 24 is formed of half cases 24A and 24B that can be divided into upper and lower parts. On the other hand, the vertically arranged rotating shaft 1
Coupling rings 26 and 27 are attached to opposite ends of the shafts 8 and 20, and the shafts 18 and 20 are connected via the coupling rings 26 and 27, respectively.
One of these couple rings 26
has a circumferential surface portion 26R on its outer periphery that is the same as the rotating shaft 18, and a braking device 12 that clamps this circumferential surface portion 26R and applies a braking force to the rotating shaft 18 is located around it.

The drive device configured in this manner is fixed via a base 28 to a floor 29 formed at the bottom of the hoistway.

With the configuration as described above, the drive motor 11 is located at the highest position in the drive device, so even if water floods the bottom of the hoistway, the amount of water may be below the brake device 12. There is no problem with elevator operation. That is, this is because no electrical parts are used below the braking device 12 of the drive device. However, if the driving electric motor 11 is arranged so that the rotating shaft 20 is horizontal, the lowest part of the outer periphery of the electric motor will be close to the floor 29, so that even a small amount of water will submerge the electric motor. Therefore, compared to the conventional drive device, the drive device of this embodiment suffers less damage from flooding due to flooding, and can reduce frequent service stoppages of elevators due to flooding.

Furthermore, since the driving electric motor 11 is arranged vertically, the planar projected area of the driving electric motor 11 is smaller than that of the conventional one. Therefore, in order to protect the driving electric motor 11 from rainwater, etc. dripping from above the hoisting path, the electric driving motor 11 is installed above the electric motor. The cover can be small.

Furthermore, by arranging the driving electric motor 11 vertically, the braking devices 12 are also arranged vertically, so that the planar projected area of the entire driving device can also be reduced. This is advantageous in relation to the installation of shock absorbers and other equipment, especially for drives installed in pits at the bottom of the hoistway.

By the way, in the above embodiment, the drive device was installed in the pit at the bottom of the hoistway.
As shown in the figure, it may be installed in a space 30 formed laterally at the bottom of the hoistway. Further, the floor of this space 30 may be on the same level as the hoistway pit, or may be formed higher.

〔Effect of the invention〕

As explained above, in the present invention, the driving electric motor constituting the driving device is arranged so that its rotation axis is vertical, so the driving electric motor is located upward, and therefore the driving device is installed at the bottom of the hoistway. Even if there is some water flooding, the drive motor will not be damaged by flooding, and the elevator can be operated safely.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view showing a drum type elevator, Fig. 2 is a plan view showing a conventional drive device, and Fig. 3 is a longitudinal side view showing a drum elevator.
The figure is a longitudinal sectional side view showing the elevator drive device according to the present invention, and FIG. 4 is a sectional view taken along the - line in FIG. 3. DESCRIPTION OF SYMBOLS 1... Hoistway, 4... Car, 6... Main rope, 8... Drive device, 9... Winding drum, 10... Speed reduction device, 11... Drive electric motor, 12... Braking device.

Claims (1)

[Scope of Claims] 1. A winding drum that raises and lowers a car in a hoistway by winding and unwinding a main rope, a driving electric motor that rotationally drives this winding cylinder through a speed reduction mechanism, and this driving electric motor. and a braking device for stopping the rotation of the elevator, and is installed at the bottom of the hoistway, wherein the drive electric motor is arranged so that its rotation axis is in the vertical direction, and An elevator drive device, characterized in that the electric motor itself is placed at the top of the elevator drive device. 2. The elevator drive device according to claim 1, wherein the speed reduction mechanism is comprised of a worm gear and a parallel shaft gear in order from the drive motor side. 3. The elevator drive device according to claim 2, wherein the braking device is provided around a rotating member between the drive electric motor and the speed reduction mechanism. 4. The elevator drive device according to claim 2, wherein the gear is housed in one gear box.