KR100816178B1 - Deflection sheave device - Google Patents

Abstract

In the forward pulley device, the main bearing is fitted to the shaft. The main pulley is fitted to the main bearing. The main pulley has a cylindrical portion disposed coaxially with the shaft so as to surround the shaft. An auxiliary pulley is provided on the outer circumferential portion of the cylindrical portion. The auxiliary pulley is rotatable about an axis and at the same time rotatable relative to the main pulley. Rope bodies are wound around the outer periphery of the main pulley and the auxiliary pulley.

Deflecting pulley device, shaft, main bearing, main pulley, cylindrical part, auxiliary pulley, rope body

Description

Forward Pulley Device {DEFLECTION SHEAVE DEVICE}

The present invention relates to a deflecting pulley device for deflecting a plurality of wound rope bodies, for example, used in an elevator or the like.

In an elevator sheave of a conventional elevator, a plurality of sheave pieces having different effective diameters are supported by a common support shaft. A bearing is interposed between each sheave piece and the support shaft, and the sheave piece is rotatable independently of each other (see Patent Document 1, for example).

Patent Document 1: Japanese Patent Application Laid-Open No. 7-61745

However, in the conventional sheave for car cages described above, when rolling bearings are used as bearings, the width of the whole sheave becomes large because the width of the bearing is large. In addition, when a sliding bearing is used as a bearing, the width dimension becomes small, but it cannot endure high speed rotation, and can only be applied to low speed elevators such as hydraulic elevators.

This invention is made | formed in order to solve the above subjects, and an object of this invention is to obtain the forward pulley apparatus which can respond to high speed rotation, reducing a width dimension.

The forward pulley device according to the present invention has a shaft, a main bearing fitted to the shaft, a cylindrical portion disposed coaxially with the shaft so as to surround the shaft, and is installed on the outer periphery of the main pulley fitted to the main bearing, the cylindrical portion and rotatable about the shaft. At the same time there is a subsidiary pulley rotatable relative to the main pulley.

Further, the forward pulley device according to the present invention includes a shaft, a main bearing fitted to the shaft, a boss disposed coaxially with the shaft so as to surround the shaft, a boss fitted to the main bearing, and installed on the outer circumference of the boss and rotatable about the shaft. At the same time, a plurality of auxiliary pulleys rotatable about the boss and a plurality of auxiliary bearings respectively provided between the boss and the auxiliary pulley are provided, the main bearing is a rolling bearing, and the auxiliary bearing is a sliding bearing.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the redirecting pulley apparatus which concerns on Embodiment 1 of this invention in partial cross section.

Fig. 2 is a front view showing, in partial cross section, a redirecting pulley device according to Embodiment 2 of the present invention.

3 is a front view showing, in partial cross section, a redirecting pulley device according to Embodiment 3 of the present invention.

4 is a front view showing, in partial cross section, a redirecting pulley device according to Embodiment 4 of the present invention.

FIG. 5 is a front view showing a partial cross section of the redirecting pulley device according to Embodiment 5 of the present invention. FIG.

FIG. 6 is a front view showing, in partial cross section, a redirecting pulley device according to Embodiment 6 of the present invention. FIG.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of this invention is described with reference to drawings.

Embodiment 1.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front view showing, in a partial cross section, a redirecting pulley device according to Embodiment 1 of the present invention, which shows, as an example, a redirecting pulley device used in a traction elevator.

In the figure, the pair of mounting girders 1 is provided in, for example, a hoistway, a machine room, a car, or a counterweight. A pair of bearing stands 2 is fixed to the installation girders 1. The shaft 3 is supported by the bearing stand 2.

A pair of main bearings 4 are fitted to the shaft 3. The main bearings 4 are arranged at intervals from each other in the axial direction of the shaft 3. Moreover, the rolling bearing is used as the main bearing 4. The main pulley 5 is fitted to the main bearing 4. That is, the main bearing 4 is interposed between the shaft 3 and the main pulley 5, and the main pulley 5 is rotatable about the shaft 3.

The main pulley 5 includes a cylindrical portion 5a disposed coaxially with the shaft 3 so as to surround the shaft 3, and a main pulley main body 5b provided at the first axial end of the cylindrical portion 5a. Have The groove 5c is provided in the outer peripheral part of the main pulley main body 5b.

The first and second auxiliary bearings 6, 7 are fitted side by side in the axial direction on the outer circumferential portion of the cylindrical portion 5a. As the first and second auxiliary bearings 6 and 7, sliding bearings are used.

The first auxiliary pulley 8 is fitted to the first auxiliary bearing 6. The second auxiliary pulley 9 is fitted to the second auxiliary bearing 7. The first and second auxiliary pulleys 8 and 9 are rotatable about the shaft 3 and are independently rotatable with respect to the main pulley 5, respectively. In addition, grooves 8a and 9a are provided in the outer peripheral portions of the first and second auxiliary pulleys 8 and 9.

The rope body 10 is inserted in the grooves 5c, 8a, and 9a and wound around the main pulley 5 and the auxiliary pulleys 8 and 9. In this example, the rope body 10 is an elevator rope such as a main rope, and the rotating shaft is wound continuously on the forward pulley 11, which is not parallel to the shaft 3.

The effective diameters (diameters of the grooves 5c, 8a, 9a) of the main pulley 5 and the auxiliary pulleys 8, 9 are different. Thereby, the entrance angle of the rope body 10 with respect to the main pulley 5 and the auxiliary pulleys 8 and 9 is prevented from becoming large. At the second axial end of the cylindrical portion 5a, a disk-shaped stopper 12 which prevents the auxiliary sheaves 8 and 9 from being pulled out is fixed by bolts.

Here, the effective diameter of the main pulley 5 is D _m , the effective diameters of the first and second auxiliary pulleys 8, 9 are respectively D _C1 and D _C2 , and the feed speed of the rope body 10 is V. If the rotational speed ω _m of the main pulley 5 and the rotational speeds ω _C1 , ω _C2 of the auxiliary pulleys 8, 9 are expressed as follows.

ω _m = V / (π D _m )

ω _C1 = V / (πD _C1 )

ω _C2 = V / (πD _C2 )

The rotational speed ω _Bm of the main bearing 4 and the rotational speeds ω _B1 and ω _B2 of the auxiliary bearings 6 and 7 are shown as follows.

ω _Bm = ω _m

ω _B1 = ω _c1 -ω _m

ω _B2 = ω _c2 -ω _m

For example, when V = 120 m / min, D _m = 0.56 _m , D _c1 = 0.54 m, and D _c2 = 0.52 m, the rotation speeds of the main pulley 5 and the auxiliary pulleys 8 and 9 are as follows. Is saved.

ω _m = 120 / (π0.56) = 68.2rpm

ω _cl = 120 / (π0.54) = 70.7rpm

ω _c2 = 120 / (π0.52) = 73.4rpm

In addition, the rotation speed of the main bearing 4 and the rotation speed of the auxiliary bearings 6 and 7 are calculated | required as follows.

ω _Bm = 68.2 rpm

ω _B1 = 70.7-68.2 = 2.5rpm

ω _B2 = 73.4-68.2 = 5.2rpm

Thus, the rotation speed of the auxiliary bearings 6 and 7 becomes extremely small with respect to the rotation speed of the main bearing 4. That is, even when the main pulley 5 and the auxiliary pulleys 8 and 9 are rotating at high speed, the rotation speed of the auxiliary bearings 6 and 7 with respect to the cylindrical part 5a is slow.

Moreover, the rotation speed of the main bearing 4 is substantially the same as the rotation speed of the normal turning pulley which does not isolate an auxiliary pulley from a main pulley. In addition, the dimensions for the mounting of the main bearing 4 are also the same as those of the normal turning pulley. For this reason, the rolling bearing of a normal turning pulley can also be used for the main bearing 4 as it is.

In addition, although the main bearing 4 is selected based on the working load, the rotation speed, the starting frequency, and the expected life, the rolling bearing is advantageous in terms of the service life because of the high running speed and the high starting frequency in the traction elevator. It is used as this main bearing 4.

On the other hand, since the rotation speed of the auxiliary pulleys 8 and 9 is sufficiently small, the sliding bearings which are excellent in terms of mounting dimensions are used as the auxiliary pulleys 8 and 9, rather than rolling bearings.

In such a forward pulley device, since the cylindrical portion 5a is provided in the main pulley 5 and the auxiliary pulleys 8 and 9 are rotated with respect to the cylindrical portion 5a, the main bearing 4 and the auxiliary bearing ( 6 and 7) can be used for bearings of different types, so that it is possible to cope with high-speed rotation while reducing the width dimension.

In particular, since a rolling bearing is used as the main bearing 4 and a sliding bearing is used as the auxiliary bearings 6 and 7, it is possible to sufficiently secure the life for high-speed rotation while reducing the width dimension efficiently.

In addition, since the effective diameter of the main pulley 5 and the effective diameter of the auxiliary pulleys 8 and 9 are different, even when the rotating shaft recognizes and arrange | positions the forward pulley 11 which is not parallel, the rope body 10 is a groove | channel. It enters in parallel with (5c, 8a, 9a), and the wear and tear of the rope body 10 and the groove | channel 5c, 8a, 9a can be suppressed.

Embodiment 2.

Next, FIG. 2 is a front view showing the redirecting pulley device according to Embodiment 2 of the present invention in a partial cross section. In Embodiment 1, one groove 5c, 8a, 9a is provided in the main pulley 5 and the auxiliary pulleys 8, 9, but in this example, the main having two grooves 13a, 13b. A pulley 13 and an auxiliary pulley 14 having two grooves 14a and 14b are used. And between the cylindrical part 13c of the main pulley 13, and the auxiliary pulley 14, the auxiliary bearing 15 which is a sliding bearing is provided. The other configuration is the same as that of the first embodiment.

In such a forward pulley device, since the effective diameter of the main pulley 13 and the effective diameter of the auxiliary pulley 14 are different, the grooves of the rope body 10 are arranged even when the forward pulleys of which the rotation axis is not parallel are arranged adjacently. The entry angle into 13a, 13b, 14a, and 14b can be made small, and the wear of the rope body 10 and the groove | channel 13a, 13b, 14a, 14b can be suppressed. In addition, since the plurality of grooves 13a, 13b, 14a, and 14b are provided in the main pulley 13 and the auxiliary pulley 14, respectively, the number of parts can be reduced to improve productivity.

Embodiment 3.

Next, FIG. 3 is a front view showing, in partial cross section, a redirecting pulley device according to Embodiment 3 of the present invention. In this example, the effective diameters of the main pulley 5 and the auxiliary pulleys 8 and 9 are the same. The other configuration is the same as that of the first embodiment.

In such a forward pulley device, the rope body 10 or the grooves 5c and 8a due to the difference in the effective diameter of the forward pulley (including the driving sheave) due to manufacturing imbalance or lack of tension adjustment of the rope body 10. , 9a) can be suppressed. In this case, since the rotation speed of the auxiliary bearings 6 and 7 with respect to the cylindrical part 5a is almost negligible, the auxiliary pulley 8 is not used as the auxiliary bearings 6 and 7 without using a sliding bearing. , 9 may be directly fitted to the cylindrical portion 5a, and a lubricant such as grease may be prepared only between the auxiliary pulleys 8 and 9 and the cylindrical portion 5a.

Embodiment 4.

Next, FIG. 4 is a front view showing, in partial cross section, a redirecting pulley device according to Embodiment 4 of the present invention. In the figure, a cylindrical boss 20 is fitted to the main bearing 4 which is a rolling bearing. The boss 20 is disposed coaxially with the shaft 3 so as to surround the shaft 3, and is rotatable about the shaft 3.

On the outer circumferential portion of the boss 20, a plurality of auxiliary pulleys 8, 9, 21 are provided. The auxiliary pulleys 8, 9, 21 are rotatable about the shaft 3, and are independently rotatable with respect to the boss 20, respectively. Grooves 8a, 9a, 21a are provided in the outer circumferential portion of the auxiliary pulleys 8, 9, 21. An auxiliary bearing 6, 7, 23 is provided between the boss 20 and the auxiliary pulleys 8, 9, 21, respectively. As the auxiliary bearings 6, 7, 23, sliding bearings are used, respectively. The other configuration is the same as that of the first embodiment.

In such a forward pulley device, a main bearing 4, which is a rolling bearing, is provided between the shaft 3 and the boss 20, and a slip bearing between the boss 20 and the auxiliary pulleys 8, 9, 21. Since the phosphorus auxiliary bearings 6, 7, 23 are provided, it is possible to cope with high-speed rotation while reducing the width dimension.

In addition, since the effective diameters of the auxiliary pulleys 8, 9, 21 are different, even when the forward pulleys 11 are disposed adjacent to each other with a non-parallel rotation axis, the rope body 10 is provided with grooves 8a, 9a, 21a. It can enter in parallel to, and the wear and tear of the rope body 10 and the grooves 8a, 9a, 21a can be suppressed.

Embodiment 5.

Next, FIG. 5 is a front view showing, in partial cross section, a redirecting pulley device according to Embodiment 5 of the present invention. In the fourth embodiment, one groove 8a, 9a, 21a is provided in each of the auxiliary pulleys 8, 9, 21. In this example, the auxiliary pulley 14 having two grooves 14a, 14b is provided. And an auxiliary pulley 22 having two grooves 22a and 22b are used. And between the boss | hub 20 and the auxiliary pulleys 14 and 22, the auxiliary bearings 15 and 24 which are sliding bearings are provided. The other configuration is the same as that of the fourth embodiment.

In such a forward pulley device, since the effective diameters of the auxiliary pulleys 14 and 22 are different from each other, the grooves 14a, 14b and 22a of the rope body 10 are disposed even when the forward pulleys whose rotation axes are not parallel are arranged adjacently. , 22b), the angle of entry can be reduced, and the wear and tear of the rope body 10 and the grooves 14a, 14b, 22a, and 22b can be suppressed. In addition, since the plurality of grooves 14a, 14b, 22a, and 22b are provided in the auxiliary pulleys 14 and 22, respectively, the number of parts can be reduced and the productivity can be improved.

Embodiment 6.

Next, FIG. 6 is a front view showing, in partial cross section, a redirecting pulley device according to Embodiment 6 of the present invention. In this example, the effective diameters of the auxiliary pulleys 8, 9 and 21 are the same. The other configuration is the same as that of the fourth embodiment.

In such a forward pulley device, the rope body 10 or the grooves 8a and 9a due to the difference in the effective diameter of the forward pulley (including the driving sheave) due to manufacturing imbalance or lack of tension adjustment of the rope body 10. , 21a) can be suppressed. In this case, since the rotation speed of the auxiliary bearings 6, 7, 23 relative to the boss 20 is almost negligible, the auxiliary bearings 6, 7, 23 are not used as the auxiliary bearings 6, 7, 23. The pulleys 8, 9 and 21 may be directly fitted to the boss 20, and a lubricant such as grease may be prepared between the auxiliary pulleys 8, 9 and 21 and the boss 20. FIG.

In addition, in the above example, although the deflection pulley apparatus applied to a traction elevator was demonstrated, you may apply the deflection pulley apparatus of this invention to apparatuses other than an elevator.

Claims (5)

shaft, A main bearing fitted to the shaft, A main pulley fitted with the main bearing, the cylindrical portion being disposed coaxially with the shaft to surround the shaft; The forward pulley device which is provided in the outer peripheral part of the said cylindrical part, is provided with the auxiliary pulley which can be rotated about the said shaft, and is rotatable with respect to the said main pulley. The method of claim 1, Further provided with an auxiliary bearing provided between the cylindrical portion and the auxiliary pulley, Said main bearing being a rolling bearing and said auxiliary bearing being a sliding bearing. The method of claim 1, An effective pulley device, wherein the effective diameter of the main pulley and the effective diameter of the auxiliary pulley are different. shaft, A main bearing fitted to the shaft, A boss disposed coaxially with the shaft so as to surround the shaft and fitted to the main bearing, A plurality of auxiliary pulleys installed at an outer periphery of the boss, rotatable about the axis and rotatable with respect to the boss; A plurality of auxiliary bearings respectively provided between the boss and the auxiliary pulley, Said main bearing being a rolling bearing and said auxiliary bearing being a sliding bearing. The method of claim 4, wherein A diverting pulley device having a different effective diameter of the auxiliary pulley.

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