JPH02300085A - Drive device in elevator - Google Patents

Abstract

PURPOSE:To restrain slip between a pulley and a rope way without enlarging the diameter of the pulley by placing plural pulleys in the positions of arrangement vertically deflected, and driving the plural pulleys simultaneously. CONSTITUTION:A pair of drive pulley 11 and 12 are arranged on a horrizontal line, and a racing pulley 13 is arranged at the lower part of the pulleys 11 and 12. Sprockets 14 and 15 are integrally provided respectively on rotating axes of the drive pulleys 11 and 12, also a chain 16 is wound around both the sprockets 14 and 15, and the other side pulley 12 too is concurrently rotated in the same direction by motor drive of one side drive pulley 11. A rope way 20, to both ends of which an elevated body 30 and an adjusting weight 40 are attached is wound around the drive pulley 11, racing pulley 13, and drive pulley 12. Consequently winding angles theta1 and theta2 of the rope way 20 at the drive pulleys 11 and 12 are enlarged with the racing pulley 13, and slip is prevented with sufficient friction resistance ensured without enlarging the diameters of the pulleys 11 and 12.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a drive device in an elevator for raising and lowering an elevator (object to be lifted and lowered).

<Prior art> As a conventional means of elevating an elevator, the hanging type shown in Fig. 4 is widely known.- The hanging type has a cableway between the drive pulley a and the floating boob IJ b arranged on the horizontal line. This is a mechanism for raising and lowering an object d connected to both ends of the cableway C and an adjustment weight e by winding the cableway C around the cableway C and rotating the driving pulley a in the forward and reverse directions.

<Problems to be Solved by the Present Invention> The above-described conventional crane-type lifting technology has the following problems.

<A> The cableway C is driven using the frictional resistance between it and the drive pulley a.

Therefore, if the frictional resistance between the two is insufficient, slipping will occur between the circumferential surfaces of the cableway C and drive pulley a, and the cableway C
is easily damaged.

<Exposure> If the frictional resistance between the drive pulley a and the cableway C is simply to be increased, a method of increasing the contact area between the two by forming the drive boo +Ja with a large diameter may be considered.

However, this is disadvantageous in terms of design because it requires an extra space to accommodate the enlarged drive pulley a and also increases the weight of the drive pulley a.

<Object of the present invention> The present invention has been made to solve the above-mentioned pressure points, and its purpose is to ensure sufficient frictional resistance without increasing the size of the device, and to provide a cableway with sufficient frictional resistance. An object of the present invention is to provide a drive device for an elevator that can reduce damage to the elevator.

<Configuration of the Present Invention> An embodiment of the present invention will be described below with reference to the drawings.

<A> Overall configuration FIG. 1 shows an overall view of an elevator equipped with a drive device according to the present invention.

The elevator includes a drive device 10 having multiple sets of pulleys, a cableway 20 that is routed between the pulleys, a lifted object 30 that is connected to one end of the cableway 20, and an adjustment weight 40 that is connected to the other end of the cableway 20. It becomes more.

<Exposure> Drive device The drive device 10 consists of a pair of drive pulleys 11.12 arranged on a horizontal line and an idling pulley 13 arranged below the drive pulleys 11.12.

Each driving pulley 11, 12 and idle pulley 13 do not change their installation position (they are placed on the top of a passage (not shown).

In order to drive the pair of drive pulleys 11.12 simultaneously, for example, sprockets 14.15 are integrally provided on the rotation shafts of the drive pulleys 11.12, respectively, and the sprockets 14.
．． By winding the chain 16 between the drive pulleys 11.15 and 15, by applying the rotation of a motor (not shown) to one of the drive pulleys 11.12, the rotation can be transmitted to the other drive pulley 11.12 at the same time and in the same direction. can.

As other methods for driving the pair of drive pulleys 11 and 12, a gear transmission mechanism or a belt winding mechanism may be employed.

In this case, it is necessary to set the circumferential speed of the drive pulleys 11, 12 to be constant.

The idle pulley 13 is a pulley for increasing the center angles θ1 and θ2 at which the cableway 20 wraps around the circumferential surface of the drive pulley 11, 12. - Incidentally, the idle pulley 13 may be constructed as a drive type by transmitting the driving force from one of the driving pulleys 11 and 12.

Alternatively, a motor may be connected individually to each drive pulley 11,12.

<Operation> Next, the sliding of the cableway 20 and the cableway 2 due to the operation of the drive device
Consider the tension acting at 0.

<A> Sliding of the cableway As shown in FIG. 1, the cableway 20 is wound around the circumferential surfaces of the driving pulley 11, the idle pulley 13, and the driving pulley 12.

For example, when the drive pulley 11 is driven, rotation is transmitted through the sprocket 14, 15 and the chain 16, and the other drive pulley 12 starts rotating at the same time.

By installing the idle pulley 13, each drive pulley 11.12
Since the winding center angles θ1 and θ2 of the cableway 20 wound around the cableway 20 are kept large, each drive pulley 11, 12 and the cableway 2
Slip is unlikely to occur between 0 and 0.

<Tension> Regarding tension, in the present invention, each drive pulley 11, 12 is driven simultaneously, and their circumferential velocities v1 and v2 are set to be constant.

Therefore, the weight of the object 3o to be lifted and lowered and the weight of the adjustment weight 40 are supported by the straight portions of the cableway 20 hanging from the drive pulleys 11, 12, respectively.

Therefore, the cableway 2 routed between the drive pulleys 11.12
The total weight of the lifted and lowered object 30 and the adjustment weight 40 does not act on the weight.

As a result, the tension load on the cableway 20 can be reduced compared to the conventional hanging type.

Other Embodiments> As shown in FIG. 2, a plurality of idle pulleys 13.13 may be arranged between the drive pulleys 11.12.

Furthermore, if a large number of drive pulleys 11.12.17 are arranged as shown in FIG. It's small enough.

In addition, in FIG. 2.3, sprockets and chains are omitted from the drawing.

<Effects of the Present Invention> Since the present invention is as described above, the following effects can be obtained.

(A) By simultaneously driving multiple pulleys and ensuring a wide winding angle for the cableway, it is possible to increase the frictional resistance between each pulley and the cableway.

Therefore, slippage between the cableway and the peripheral surface of the pulley can be effectively suppressed, and damage to the cableway can be avoided.

This is advantageous in terms of design because it is possible to increase the frictional resistance with the cableway without increasing the diameter or weight of the pulley.

<C> The more drive pulleys are installed, the smaller the frictional force that each pulley must bear individually.

[Brief explanation of the drawing]

Fig. 1 2 Overall view of an elevator equipped with a drive device according to the present invention Figure 2.3: Explanatory diagram of other embodiments Figure 4: Explanatory diagram of conventional technology Figure 2 Figure 3 Figure 4 Illustration of conventional technology

Claims (1)

[Claims] (1) In an elevator in which a cableway is routed between multiple sets of pulleys, an object to be lifted and lowered is connected to one end of the cableway, and an adjustment weight is connected to the other end of the cableway, multiple A drive device for an elevator, characterized in that pulleys are arranged and the plurality of pulleys are driven simultaneously.