JPS633823B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device that is provided with a drive machine having a transmission and is used in an elevator system or the like.

For example, elevator equipment has been put into practical use that is equipped with a drive machine that has a gear type reducer, and an electric motor is installed on the input shaft of the reducer, and the main rope of the elevator is wrapped around the output shaft. A drive sheave is provided and configured to drive the car via the main rope. However, gear-type reducers generate vibrations and noise, which are transmitted to the building where the elevator is installed, impairing the living environment, and vibrations and noise are transmitted to the car via the main rope, which affects the passengers inside the car. There was a problem that caused discomfort.

The present invention aims to eliminate the above-mentioned drawbacks and to provide a drive device that is provided with a drive machine having a friction type transmission and that can be operated quietly and safely.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3 in the case of an elevator system.

In the figure, 1 is an elevator drive machine, 2 is a transmission consisting of a reduction gear that forms the main part of this, and 2a is a transmission 2.
2b is an input shaft pivotally connected to the housing 2a, 2c is a first roller fixed thereto, 2d is an output shaft pivotally connected to the housing 2a,
2e is a support plate provided on one side of the output shaft 2d and placed inside the housing 2a; 2f is placed upright on this support plate and is placed parallel to the cylindrical surface of the first roller 2c; Support shafts arranged apart from each other around the cylindrical surface; 2g is a second roller pivoted to the support shaft 2f; one side of the cylindrical surface is pressed against the cylindrical surface of the first roller 2c; 2h is a housing a third friction body fixed within 2a and having a cylindrical inner surface against which the other side of the cylindrical surface of the second roller 2g is pressed;
3 is an electric motor rotatably connected to the input shaft 2b, 4 is a drive sheave fixed to the output shaft 2d, 5 is a main rope wound around this, and 6 is a car suspended from one end of the main rope 5. , 7 is a counterweight suspended from the other end of the main rope 5, 8 is a normal electromagnetic brake device installed on the electric motor 3 and brakes the input shaft 2b when required, 8a is an electromagnet thereof, and 9 is an output. 9a is an emergency brake device installed on the shaft 2d and brakes it when necessary.
10 is an electromagnet for this, and 10 is a control device for normal operation, which de-energizes the electromagnet 8a and operates the electromagnetic brake device for normal operation when necessary. Reference numeral 11 indicates an abnormality detection device that is energized by the operation of a speed governor (not shown) or the like that detects an abnormal speed of the car 6, and (+) and (-) are power supplies.

That is, when the electric motor 3 is energized, the input shaft 2b
rotates, and this rotation causes the first and second rollers 2c,
2g and is decelerated by the frictional transmission of the third frictional body 2h and transmitted to the output shaft 2d. As a result, the drive sheave 4 rotates, and the car 6 and counterweight 7 are driven in opposite directions via the main rope 5. Since the transmission by the first and second rollers 2c, 2g, etc., that is, the speed change by the transmission 2, is achieved by frictional force, a quiet elevator with less vibration and noise can be obtained. However, in the case of transmission using friction, abnormalities such as wear of the first rollers 2c, etc., may make it impossible to obtain the required power transmission ability, which may cause the elevator to become inoperable or the car 6, etc. to slide down. When such an abnormality occurs, the abnormality detection device 11 is energized, the electromagnet 9a is deenergized, the emergency electromagnetic brake device 9 brakes the output shaft 2d, and the drive sheave 4 is stopped. Therefore, a quiet and highly safe elevator system can be obtained. Although detailed explanation is omitted, the abnormality detection device 11
The electric motor 3 is deenergized by the operation.

The abnormality detection device 11 in this embodiment is configured as follows: an input detector that generates an output corresponding to the rotational speed of the input shaft, and an output detector that generates an output corresponding to the rotational speed of the output shaft. It is clear that even an abnormality detection device that compares the outputs of the two and operates when the comparison value is outside a predetermined range can obtain the same effect as the embodiments shown in FIGS. 1 to 3.

As explained above, the present invention provides a driving mechanism in which an electric motor is provided on the input shaft of a transmission consisting of a friction transmission mechanism, a normal electromagnetic brake device is provided on the input shaft of the transmission, and an electromagnetic brake device for normal use is provided on the input shaft of the transmission. The emergency electromagnetic brake device is equipped with an emergency electromagnetic brake device that is energized to perform a braking operation via an abnormality detection device that detects an abnormality in the drive machine and operates. This realizes a highly safe drive system that can operate quietly with little vibration and noise due to the transmission using friction transmission, and that can be stopped by the emergency electromagnetic brake device in the event of an abnormality.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional view of an elevator system showing an embodiment of the drive device according to the present invention, FIG. FIG. 2 is a block diagram conceptually showing a main part of the electric circuit of the drive device shown in FIG. 1; DESCRIPTION OF SYMBOLS 1...Driver, 2...Transmission, 2a...Housing, 2b...Input shaft, 2c...First roller, 2
d...Output shaft, 2f...Support shaft, 2g...Second roller, 2h...Friction body, 3...Electric motor, 4...Drive sheave, 5...Main rope, 6...Cage, 8... . . . Normal electromagnetic brake device, 9 .

Claims (1)

[Claims] 1 a first roller fixed to an input shaft pivotally supported by a housing; a friction body fixed to the housing and having a cylindrical inner surface facing the cylindrical surface of the first roller; a friction body pivotally supported by the housing and the input shaft an output shaft disposed on the same axis as the input shaft, one end protruding, and the other end fixed to a support shaft disposed parallel to the input shaft and provided between the first roller and the friction body; and the support shaft. A transmission is provided with a second roller that is pivotally supported by a rotor, rotates on its own axis, and revolves around the output shaft, and performs a deceleration operation by friction transmission between the first roller, a friction body, and a second roller; a driving electric motor, a driving sheave fixed to the protruding end of the output shaft, and a normal electromagnetic brake device installed in the driving machine including the transmission, the electric motor, and the driving sheave and braking the input shaft; an abnormality detection device that operates when the car, which is lifted and lowered by the drive machine while being suspended on a main rope wrapped around the drive sheave, reaches an abnormal speed that does not correspond to the rotational speed of the input shaft; and an emergency electromagnetic brake device that is provided in the emergency electromagnetic brake device and is energized through the operation of the abnormality detection device to brake the output shaft.