JPH11124287A - Hoist for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lift a car to a given floor at the time of renewal, with an elevator used in a normal use condition intact, without installing a large scale facility. SOLUTION: Drawing force can be imparted to the rotor base part 11 of a rotor 5 via a pair of screw rods 32, by equipping the cylindrical rotor base part 11 thereto the rotor 5 is fitted to a rotor shaft 4, and a laminated iron core 12 comprised by laminating thin iron plates on the outer periphery of the rotor base part 11; forming two through holes 13, parallel to the axis center of the rotor shaft 4, along a circumferential direction at same intervals, on the rotor base part 11; and inserting the screw rods 32 of a drawing device 30 into the through holes 13 of the rotor base part 11 respectively; to drive the driving parts 33a of hydraulic rams 33. Consequently, the laminated iron core 12 together with the rotor base part 11 can be drawn from the rotor shaft 4, thereby disassembling a hoist without hindering the rotor 5 and the rotor spindle 4 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoist for an elevator, and more particularly to a so-called gearless hoist without a speed reducer.

[0002]

2. Description of the Related Art FIG. 8 is a diagram showing a disassembled state of a conventional gearless hoist of this type, and FIG. 9 is an explanatory diagram showing the configuration of a rotor and a rotor shaft provided in the gearless hoist of FIG. . Elevator gearless hoist 1 shown in FIG.
A base 2 mounted on the floor of a machine room (not shown), a motor 3 removably mounted on the base 2, a rotor 5 mounted on a rotor shaft 4 of the motor 3, The hoisting sheave 6 and the brake drum 7, which are arranged on the side of the rotor 5 and are mounted on the rotor shaft 4, are removably mounted on the base 2, and rotatably support both ends of the rotor shaft 4. And a pair of bearing devices 8. As shown in FIG. 9, a key 9 is mounted on the outer periphery of the intermediate large diameter portion of the rotor shaft 4 along the axial direction of the rotor shaft 4.
The laminated iron cores 5a of the rotor 5 are fitted one by one along. In addition, as a thing related to this kind of prior art, there is one described in Japanese Utility Model Laid-Open No. Sho 62-179281.

[0003] The gearless hoist 1 as described above.
Is installed in a building under construction, the gearless hoist 1 is lifted to a predetermined floor using a lifting machine such as a tower crane for lifting construction equipment. However, when the gearless hoist 1 is renewed, the lifting operation of the gearless hoist 1 to a predetermined floor cannot be performed because the hoist has been removed.

[0004] However, if the sheave groove of the hoisting sheave 6 is worn over time after the elevator is installed, it is necessary to replace the hoisting sheave 6 when a predetermined amount of wear is reached for ensuring safety. It is time to renew this type of hoist in high-rise buildings. Therefore, as one means for solving the above-mentioned conventional problems, for example, a lifting method of an elevator hoist has been proposed as described in Japanese Patent Application Laid-Open No. 9-20480. Further, as described in, for example, JP-A-8-81164, the gearless hoist 1
In addition, a method of assembling an elevator hoist has been proposed in order to separate and lift the rotor 5 of the electric motor 3 and other parts (stator) of the electric motor 3 and the like.

[0005]

The mass of the above-described gearless hoist 1 is slightly different depending on the load, speed, and ascent / descent stroke of the elevator.
Since it is relatively heavy, about 5 to 6 tons, as described above, the gearless hoisting machine 1 could not be lifted to a predetermined floor with the gearless hoisting unit 1 without a hoist as described above. Therefore, for example, Japanese Patent Application Laid-Open
It is conceivable to disassemble and lift the gearless hoist 1 to a predetermined floor by using an assembling method of the hoist as described in JP-A-81164, but as shown in FIG. Since the laminated cores 5a of the rotor 5 are fitted one by one along the key 9 parallel to the axial direction of the shaft 4, when the laminated cores 5a are to be removed from the rotor shaft 4, the laminated cores 5a There is a concern that a bending force may be applied to cause damage, that is, the rotor 5 cannot be removed from the rotor shaft 4. As a result, the mass of the integral body of the rotor shaft 4 and the rotor 5 becomes about 3.5 tons. Also, it was difficult to lift to the predetermined floor.

Particularly, in a high-rise building or the like, the elevator lift is 2
Because it exceeds 00m, it is necessary to prepare large-scale lifting equipment corresponding to it, and to process a part of the building and the elevator for installation of this lifting equipment,
There has been a great burden on workers involved in the renewal of the gearless hoist 1, and there has been a demand for improved safety during work.

The present invention has been made in view of such a situation in the prior art, and an object of the present invention is to use an elevator installed in a building in a normal use state without the necessity of installing large-scale equipment at the time of renewal. An object of the present invention is to provide an elevator hoist that can be used as it is and can be lifted to a predetermined floor.

[0008]

In order to achieve the above object, the present invention provides a base, an electric motor removably mounted on the base, and a rotor mounted on a rotor shaft of the electric motor. A winding sheave and a brake drum, which are disposed on the sides of the rotor and are mounted on the rotor shaft, and a pair of removably mounted on the base and rotatably supporting both ends of the rotor shaft. In the elevator hoisting machine provided with the bearing device, the rotor is formed by laminating a thin iron plate on an outer periphery of the cylindrical rotor base portion fitted to the rotor shaft and the rotor base portion. And a conductor provided on the outer periphery of the laminated core for inducing a secondary current, and a plurality of holes parallel to the axis of the rotor shaft are formed in the rotor base. Equidistant along the circumference It is to form the structure.

In the present invention constructed as described above, the rods are respectively engaged with the plurality of holes formed in the rotor base of the rotor, and the rotor base is connected to the rotor shaft via these rods. By pulling the rotor base portion in a direction parallel to the axis of the rotor, the rotor base portion is pulled out of the rotor shaft together with the laminated core, and disassembled into the rotor and the rotor shaft.
As a result, the elevator installed in the building can be lifted to a predetermined floor by using the elevator installed in the building in a normal use state without requiring large-scale installation of the equipment at the time of renewal.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an elevator hoist of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing the overall configuration of an elevator hoist according to an embodiment of the present invention. FIG. 2 is an explanatory view showing the configuration of a rotor base and a laminated iron core provided in the hoist of FIG.
FIG. 4 shows a state in which the hoist of the present embodiment is disassembled,
Is an explanatory view of a removing device for removing the rotor base portion and the laminated iron core of FIG. 2, FIG. 5 is an explanatory diagram of a state where the hydraulic ram of the removing device is driven to the stroke end, and FIG. 6 is a drawing by the removing device of FIG. FIG. 7 is an explanatory view in the middle of performing the work, and FIG. 7 is an explanatory view of a state in which the hydraulic ram of the extracting device is driven again to the stroke end. In FIGS. 1 to 7, the same components as those shown in FIGS. 8 and 9 are denoted by the same reference numerals.

The hoist of this embodiment, that is, the gearless hoist 10 shown in FIG. 1 is different from the conventional hoist shown in FIGS. 8 and 9 in that the rotor 5 is connected via the key 9 in FIG. Cylindrical rotor base portion 11 fitted to rotor shaft 4
And a laminated iron core 12 formed by laminating thin iron plates, which is welded on the outer periphery of the rotor base portion 11, and
A plurality of holes parallel to the rotor shaft 4 in the rotor base portion 11;
For example, it differs mainly in that two through holes 13 are formed at equal intervals along the circumferential direction, and the other configurations are basically the same.

In FIG. 1, the electric motor 3 has a stator laminated core 14 which is detachably mounted on the base 2. The stator laminated iron core 14 is sandwiched by an iron core holding plate 15 serving as a mounting foot fixed on the base 2, and has a built-in stator coil 16.
6 is covered with a protective cover 17. The laminated core 12 of the rotor 5 is sandwiched by a core pressing plate 18 fitted to the rotor base 11, and a conductor 19 for inducing a secondary current is attached to the outer periphery of the laminated core 12. . The bearing device 8 includes a bearing stand 20 fixed on the base 2 and a bearing 21 provided on the bearing stand 20 and rotatably receiving the rotor 5. The hoisting sheave 6 has an elevator 22 such as a car.
Is wound around, and the rotational force of the electric motor 3 is transmitted directly from the rotor shaft 4 to the hoisting sheave 6 to drive the elevating body 22 via the main rope 23. . Further, a through-hole 24 is formed in the hoisting sheave 6 for reducing the mass and for manufacturing reasons. The hoisting sheave 6 and the brake drum 7 are integrally formed,
A brake 25 for applying a braking force to the brake drum 7
Are provided on the base 2.

The gearless hoist 1 of the present embodiment
4, the pulling device 30 is inserted into the through hole 13 of the rotor base 11 and a pair of rods, for example, a screw rod 32, into which nuts 31 are screwed at respective ends, as shown in FIG. Part 33a and a cylinder 33b,
Hydraulic ram 33 for applying a pulling force to a pair of screw rods 32
And a pressing portion 34 abutting on the end face of the rotor shaft 4, and a pressing plate 3 mounted on the pressing portion 34 and through which the screw rod 32 is inserted.
5 and a nut 36 screwed to each end of the pair of screw rods 32
It consists of

In this embodiment, the drawing device 30
Screw holes 32 of the rotor base 11
3, a nut 31 is screwed into each end, and a pressing portion 34 is brought into contact with an end surface of the rotor shaft 4, and the screw bar 32 is attached to a pressing plate 35 mounted on the pressing portion 34. Insert. Then, a reduced hydraulic ram 33 is mounted on the side of each screw bar 32 protruding from the holding plate 35 (that is, the right side in FIG. 4), and a nut 36 is screwed to the end of each screw bar 32.

Next, as shown in FIG.
Is protruded from the cylinder 33b to apply a pulling force to the pair of screw rods 32 in a direction parallel to the rotor axis.
2 is displaced to the left of FIG.

Next, when the stroke of the hydraulic ram 33 is insufficient and the rotor base portion 11 and the laminated iron core 12 cannot be pulled out of the rotor 4 at one time, as shown in FIG. 33b, and tighten the nut 36 until it comes into contact with the drive unit 33a.
Next, as shown in FIG. 7, the driving unit 33a of the hydraulic ram 33 is driven again to apply a pulling force to the pair of screw rods 32 in a direction parallel to the rotor axis. By repeating the expansion / contraction operation of the hydraulic ram 33 in this manner, the rotor base 1
1 and the laminated core 12 are pulled out from the rotor shaft 4.

In the embodiment configured as described above, by applying a drawing force to the rotor base portion 11 using the drawing device 30, the laminated core 12 is pulled out of the rotor shaft 4 together with the rotor base portion 11. In addition, it is not necessary to apply a bending force to the laminated core 12 to damage it. Thus, the gearless hoist 10 is connected to the base 2, the stator laminated iron core 14, the hoisting sheave 6, the brake drum 7, the rotor shaft 4, the rotor base 11, the laminated iron core 12, the other bearing device 8, the brake 25 and the like. Can be disassembled and transported. For example, when the entire mass of the gearless hoist 10 is about 6 tons, the mass of each of the above-mentioned disassembled parts can be suppressed to about 1.5 tons at most. Therefore, when the gearless hoist 10 is renewed, the above-described disassembled parts can be lifted to a predetermined floor by using the elevator installed in the building in a normal use state, and further, from the top floor to the elevator machine room. Lifting does not require large-scale equipment installation.

In the above-described embodiment, two through holes 13 are provided in the rotor base portion 11. Instead of the through holes 13, a screw hole into which a screw rod 32 is screwed may be provided. The number of holes provided in the rotor base 11 may be three or more.

[0019]

As described above, according to the present invention, an elevator installed in a building can be lifted to a predetermined floor by using an elevator installed in a building in a normal use state without requiring large-scale installation at the time of renewal. Therefore, the efficiency and safety of the renewal operation of the hoist can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an overall configuration of an elevator hoist according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of a rotor base portion and a laminated core provided in the hoist of FIG. 1;

FIG. 3 is a diagram showing a state in which the hoist of the present embodiment is disassembled.

FIG. 4 is an explanatory view of a removal device for removing a rotor base portion and a laminated core of FIG. 2;

FIG. 5 is an explanatory diagram of a state in which a hydraulic ram of the extraction device is driven to a stroke end.

FIG. 6 is an explanatory view in the middle of performing the extraction operation by the extraction device of FIG. 4;

FIG. 7 is an explanatory diagram of a state where the hydraulic ram of the extracting device is driven again to the stroke end.

FIG. 8 is a view showing a state where a conventional gearless hoist is disassembled.

FIG. 9 is an explanatory diagram showing a configuration of a rotor and a rotor shaft provided in the gearless hoist shown in FIG. 8;

[Explanation of symbols]

 2 Base 3 Electric motor 4 Rotor shaft 5 Rotor 6 Hoisting sheave 7 Brake drum 8 Bearing device 9 Key 10 Gearless hoisting machine (Hoisting machine) 11 Rotor base part 12 Laminated iron core 13 Through hole (hole) 19 Conductor part 30 Pulling out device 31 Nut 32 Screw rod (33) Hydraulic ram 34 Holding part 35 Holding plate 36 Nut

Claims (1)

[Claims] 1. A base, an electric motor removably mounted on the base, a rotor mounted on a rotor shaft of the electric motor, and a rotor shaft arranged on a side of the rotor. A hoisting sheave and a brake drum mounted on the base; and a pair of bearing devices removably mounted on the base and rotatably supporting both ends of the rotor shaft. A cylindrical rotor base fitted to the rotor shaft, a laminated core formed by laminating a thin iron plate on the outer periphery of the rotor base, and a second core provided on the outer periphery of the laminated core. And a conductor portion for inducing a secondary current, and a plurality of holes parallel to the axis of the rotor shaft are formed in the rotor base portion at equal intervals along the circumferential direction. Elevator hoist.