HK1126741B - Elevator device - Google Patents

Description

Elevator installation

Technical Field

The invention relates to an elevator installation, the elevator car and the counterweight of which move along guide rails in a hoistway.

Background

Conventionally, as a method for improving the power transmission capability, an elevator apparatus has been proposed in which the winding angle of a rope on a hoisting machine drive sheave is set to 180 ° or more.

For example, japanese patent application laid-open No. 61-282285 (fig. 1 and the like) discloses an elevator apparatus in which a rope winding angle on a drive sheave of a hoisting machine is set to 360 ° or more.

However, in the elevator apparatus disclosed in the above patent document, no consideration is given to the size of the elevator apparatus including the hoisting machine. In fact, in the above patent document, the suspension cable is directly fixed to the elevator car and the counterweight, and a 1: 1 winding method is adopted, so that the hoisting machine requires a large torque. As a result, the overall structure of the hoist is increased, and thus the space of the lifting passage is not easily saved.

Disclosure of Invention

The invention aims to provide an elevator device, which has a small structure of a device such as a winch and the like, and can save the space of a lifting channel.

In order to achieve the above object, in an elevator apparatus of the present invention, an elevator car and a counterweight suspended by a rope in a hoistway are driven by a hoist, and the elevator apparatus has a suspension sheave provided at an upper portion of the elevator car, a rope retainer provided at the elevator car, a suspension sheave provided at an upper portion of the counterweight, and a rope retainer provided at an upper portion of the counterweight, and the rope is wound around a drive sheave of the hoist at a winding angle of 360 ° or more.

According to the present invention, it is possible to provide an elevator apparatus in which the space of the hoistway can be saved because the structure of the apparatus such as a hoisting machine is small.

Drawings

Fig. 1 is a diagram showing a method of winding a rope in an elevator apparatus according to embodiment 1 of the present invention.

Fig. 2 is a top sectional view of a hoistway of an elevator apparatus according to embodiment 1 of the present invention.

Fig. 3 is a diagram showing a method of winding a rope in an elevator apparatus according to embodiment 2 of the present invention.

Fig. 4 is a top sectional view of a hoistway of an elevator apparatus according to embodiment 2 of the present invention.

Fig. 5 is a diagram showing a method of winding a rope in an elevator apparatus according to embodiment 3 of the present invention.

Fig. 6 is a top sectional view of a hoistway of an elevator apparatus according to embodiment 3 of the present invention.

Fig. 7 is a diagram showing a method of winding a rope in an elevator apparatus according to embodiment 4 of the present invention.

Fig. 8 is a top sectional view of a hoistway of an elevator apparatus according to embodiment 4 of the present invention.

Fig. 9 is a diagram showing a method of winding a rope around a drive sheave in an elevator apparatus according to embodiment 1 of the present invention.

Fig. 10 is a diagram showing a method of winding a rope around a drive sheave in an elevator apparatus according to embodiment 2 of the present invention.

Fig. 11 is a diagram showing a method of winding a rope around a drive sheave in an elevator apparatus according to embodiment 3 of the present invention.

Description of the symbols

1 Elevator cage

2 balance weight

3. 15 Sling fastener

4. 8, 8a, 13 suspension pulley

5 suspension cable

6. 7 elevator car side diverting pulley

9 st drive sheave side 1 diverting pulley

10 drive sheave

11 hoist

12 nd 2 nd drive sheave side diverting pulley

14 counterweight-side diverting pulley

16a, 16b guide rail for elevator car

17a, 17b balance weight guide rail

18-drive sheave-side diverting pulley

Detailed Description

Embodiments of the present invention are described below with reference to the drawings.

Fig. 1 is a diagram showing a method of winding a rope 5 in an elevator apparatus according to embodiment 1 of the present invention, and fig. 2 is a top cross-sectional view of a hoistway in the elevator apparatus according to embodiment 1. The elevator apparatus of the present embodiment is configured such that the elevator car 1 travels up and down along the elevator car guide rails 16a and 16b in the hoistway, and the counterweight 2 travels up and down along the counterweight guide rails 17a and 17b in the hoistway. Further, the elevator car 1 and the counterweight 2 are suspended by a hoist rope 5 and driven by a hoist 11. Here, as the hoist 11, a long and flat hoist having an axial length larger than the diameter of the drive sheave 10 is used.

A suspension sheave 8 is provided on the upper part of the elevator car 1, a rope fixing member 3 is provided on the lower part of the elevator car 1, and a suspension sheave 4 is provided on the side surface of the lower part of the elevator car 1. On the other hand, a suspension sheave 13 and a rope retainer 15 are provided at the upper part of the counterweight 2.

Further, a 1 st driving sheave side diverting pulley 9, a 2 nd driving sheave side diverting pulley 12, and a driving sheave 10 of a hoist 11 are provided in an upper portion of the ascending/descending passage. The 1 st driving sheave side diverting pulley 9, the 2 nd driving sheave side diverting pulley 12 and the driving sheave 10 are located at substantially the same height, and as shown in fig. 2, vertical projections of the pulleys are substantially parallel to each other. In addition, 2 elevator car-side diverting pulleys 6, 7 and a counterweight-side diverting pulley 14 are provided in the upper part of the hoistway. The vertical projections of the elevator car-side diverting pulleys 6, 7 and the counterweight-side diverting pulley 14 and the suspension pulleys 8, 13 are substantially parallel to each other and the vertical projections are substantially perpendicular to the 1 st driving sheave-side diverting pulley 9 and the 2 nd driving sheave-side diverting pulley 12 and the driving sheave 10.

The hoisting machine 11 is disposed such that its axis is substantially parallel to the opening/closing direction of the hall door and is positioned within the vertical projection of the elevator car 1. In addition, counterweight 2 is disposed on the back of elevator car 1. Here, the back of the elevator car 1 refers to a portion located behind the elevator car 1 as viewed from the elevator hall side.

A method of winding the hoist rope 5 in the elevator apparatus of the present embodiment will be described below with reference to fig. 1. The elevator apparatus of the present embodiment basically adopts a 3: 1 winding method for suspending the elevator car 1 and the counterweight 2 by using the suspension rope fixtures 3 and 15 and the suspension pulleys 8 and 13. As shown in fig. 1, the specific method is as follows: one end of a rope 5 is fixed to a rope fixing member 3 below the elevator car 1, and the other end of the rope 5 extends in a substantially horizontal direction from the rope fixing member 3 to a suspending pulley 4, turns around via the suspending pulley 4, and extends upward, and then the other end of the rope 5 extends upward to an elevator car-side diverting pulley 6, extends in a substantially horizontal direction to another elevator car-side diverting pulley 7, turns around via the elevator car-side diverting pulley 7, and extends downward. Then, the other end of the hoist rope 5 extends to a suspension sheave 8 in the upper part of the elevator car 1, is diverted by the suspension sheave 8, extends upward to a 1 st drive sheave side diverting sheave 9, is wound over a drive sheave 10, and is wound around the drive sheave 10 by substantially 360 °. Then, the other end of the hoist rope 5 extends to the 2 nd driving sheave side diverting pulley 12, and is diverted by the diverting pulley 12 and then extends downward. Then, the other end of the hoist rope 5 extends to a suspension sheave 13 on the upper part of the counterweight 2, and is deflected by the suspension sheave 13 and extends upward. Then, the other end of the wire 5 extends to the counterweight-side diverting pulley 14, is diverted by the diverting pulley 14, extends downward, and reaches a wire fixing member 15 on the upper part of the counterweight 2, and then the other end of the wire 5 is fixed to the wire fixing member 15.

Here, as shown in fig. 9, in the method of winding the slings 5 around the drive sheave 10 in the present embodiment, after 3 slings 5 are spirally wound around the drive sheave surface 10a by substantially 360 °, the winding start position and the winding end position are still deviated in the axial direction, and therefore the slings 5 do not come into contact with each other. The hoist rope 5 is wound around the drive sheave 10 via the 1 st drive sheave-side diverting pulley 9, and is wound around the drive sheave 10 by substantially 360 °, and is then diverted downward via the 2 nd drive sheave-side diverting pulley 12. That is, the winding directions of the hoist rope 5 on the drive sheave 10, the 1 st drive sheave-side diverting pulley 9, and the 2 nd drive sheave-side diverting pulley 12 are the same direction, that is, the winding direction of the hoist rope 5 is clockwise.

According to the present embodiment, since the winding angle of the hoist rope 5 on the drive sheave 10 is substantially 360 °, the diameter of the drive sheave 10 of the hoist 11 can be reduced while sufficiently securing power transmission, and as a result, the hoist 11 with a small torque can be used. Further, since the 3: 1 winding system is adopted, the vertical load is dispersed into 3 parts, and as a result, the hoist 11 of a small torque can be used. As described above, in the present embodiment, since the hoist 11 with a small torque can be used, the hoist 11 itself can be downsized, and the space of the hoistway can be saved.

Further, since the winding angle of the rope 5 around the drive sheave 10 is substantially 360 °, it is not necessary to raise the position of the drive sheave 10 to obtain sufficient power transmission, and it is also not necessary to separately provide a diverting pulley near the lower portion of the drive sheave 10. Here, since it is not necessary to raise the position of the driving sheave 10, it contributes to a reduction in the height of the elevating path and a space saving of the elevating path. And, since it is not necessary to provide an extra pulley, it contributes to saving the space of the elevating path.

In addition, since it is not necessary to provide an extra pulley, the number of times the hoist rope 5 is bent is reduced, and as a result, the life of the hoist rope 5 is increased. Further, since the rope 5 is wound around the drive sheave 10, the 1 st drive sheave side diverting pulley 9, and the 2 nd drive sheave side diverting pulley 12 in the clockwise direction, the service life of the rope 5 can be ensured to be extended even if the radius of the sheave is reduced.

Fig. 3 is a view showing a method of winding a rope 5 in an elevator apparatus according to embodiment 2 of the present invention, and fig. 4 is a top sectional view of a hoistway in the elevator apparatus according to embodiment 2. The elevator system of the present embodiment is different from embodiment 1 in that a pair of suspension pulleys 8, 8a are provided on the side surface under the floor of the elevator car 1, and rope fixtures 3, 15 are provided at the upper part of the hoistway at positions that do not hinder the traveling of the elevator car 1 and the counterweight 2. That is, in the present embodiment, the 2: 1 winding method is adopted, and since the winding machine 11 of a small torque can be used as compared with the 1: 1 winding method, the size reduction of the winding machine 11 can be realized, and as a result, the space of the hoistway can be saved.

Further, as shown in fig. 4, the present embodiment is different from embodiment 1 in that the 1 st driving sheave side diverting pulley 9, the 2 nd driving sheave side diverting pulley 12, and the driving sheave 10 are inclined with respect to the opening and closing direction of the hall door. With this arrangement, even if the 2: 1 winding method is adopted, the hoist 11 can be disposed in the vertical projection of the elevator car 1, and the counterweight 2 can be disposed on the back of the elevator car 1.

In this embodiment, as in embodiment 1, the 1 st driving sheave side diverting pulley 9 and the 2 nd driving sheave side diverting pulley 12 are disposed substantially linearly with the driving sheave 10 and the hoisting machine 11 interposed therebetween, and therefore, as in embodiment 1, a vertical load hardly acts on the driving sheave 10. Further, it is not necessary to perform an operation of moving the position of the drive sheave 10 upward to adjust the winding angle of the hoist rope 5. Therefore, the space saving effect of the hoistway, that is, the effect of installing the hoist 11 even in the hoistway where the space is limited can be obtained.

In addition, the shape of the drive sheave surface 10a in the present embodiment is such that the radius of the drive sheave 10 is small at the axial end and large at the axial center, as shown in fig. 10. The driving sheave surface 10a is formed into a curved surface, specifically, a substantially circular elliptical shape or a substantially circular arc shape. By using the drive sheave 10, the side of the sheave 5 entering the drive sheave surface 10a is easily slid toward the side opposite to the hoist 11, and the side of the sheave coming out from the drive sheave surface 10a is easily slid toward the hoist 11. Therefore, the slings 5 are less likely to come into contact with each other, and an effect of preventing abnormal wear of the slings 5 can be obtained.

Fig. 5 is a view showing a method of winding a rope 5 in an elevator apparatus according to embodiment 3 of the present invention, and fig. 6 is a top sectional view of a hoistway in the elevator apparatus according to embodiment 3. The elevator system of this embodiment is substantially the same as that of embodiment 1, and a 3: 1 winding method is used, but the specific method of winding the suspension wire is different, and will be described below with reference to fig. 5.

As shown in the figure, one end of a suspension rope 5 is fixed by a rope fixing member 3 at the lower part of the elevator car 1, and the other end of the suspension rope 5 extends in a substantially horizontal direction from the rope fixing member 3, turns around via a suspension sheave 4, and extends upward. Then, the other end of the rope 5 extends upward to the elevator car-side diverting pulley 6, extends in a substantially horizontal direction to the other elevator car-side diverting pulley 7, is diverted by the elevator car-side diverting pulley 7, and then extends downward. The other end of the suspension rope 5 is turned by the suspension pulley 8 on the upper part of the elevator car 1 and extends upward, passes through the drive sheave-side turning pulley 18, is wound around the drive sheave 10, is turned around approximately 450 ° and extends downward. The other end of the hoist rope 5 extends to the suspension sheave 13 on the upper part of the counterweight 2, and is turned to extend upward. Then, the other end of the hoist rope 5 is turned by the counterweight-side turning pulley 14, extends downward to reach a hoist rope anchor 15 on the upper part of the counterweight 2, and is fixed to the hoist rope anchor 15.

In this way, the drive sheave side diverting pulley 18 is located between the suspension pulley 8 of the elevator car and the drive sheave 10, and the drive sheave 10 also functions as the 2 nd drive sheave side diverting pulley 12 in the above-described 1 st embodiment. As the number of diverting pulleys is reduced, the space required for the suspension (overlap) can be saved accordingly. Further, the present embodiment is particularly effective if the drive sheave 10 cannot be provided between the 1 st driving sheave-side diverting pulley 9 and the 2 nd driving sheave-side diverting pulley 12 as in the 1 st embodiment, subject to the restriction of physical conditions. Further, unlike the above-described embodiment 1, in the present embodiment, since the winding angle of the hoist rope 5 on the drive sheave 10 is substantially 450 °, more efficient power transmission can be performed. In addition, the hoist 11 of the present embodiment is disposed so that its vertical projection overlaps both the elevator car 1 and the counterweight 2.

The drive sheave 10 of the present embodiment has a small radius on the main body side of the hoist 11 and a large radius on the opposite side of the main body side, and specifically has a drive sheave surface 10a having a substantially truncated conical shape as shown in fig. 11. Therefore, when the surface pressure of the driving sheave surface 10a with respect to the hoist rope 5 is substantially constant, the hoist rope 5 is more likely to slide toward the main body of the hoist 11, and therefore the hoist ropes 5 are less likely to come into contact with each other, and an effect of preventing abnormal wear can be obtained.

Fig. 7 is a diagram showing a method of winding a rope 5 in an elevator apparatus according to embodiment 4 of the present invention, and fig. 8 is a top cross-sectional view of a hoistway in the elevator apparatus according to embodiment 4. The elevator apparatus of this embodiment uses the winding method of 2: 1 in the same manner as in embodiment 2, but differs from the above-described embodiment in that the counterweight 2 is disposed in the left side portion of the elevator car 1. The left-hand side of the elevator car 1 is the part of the elevator car 1 that is to the left of the elevator car as seen from the elevator lobby. Further, the drive sheave 10 also functions as the 1 st drive sheave-side diverting pulley 9 in the above-described embodiment 1, and there is an advantage in that the hoisting machine 11 can be disposed at a position convenient for maintenance.

The surface of the drive sheave 10 in this embodiment is subjected to shot peening, knurling, or plating such as nickel plating or chromium plating. Of course, the shot peening or knurling treatment may be performed, and then, the plating treatment may be further performed.

In the above-described embodiments 1 to 4, the winding angle is set to an angle of substantially 360 ° or an angle exceeding 360 °, for example, an angle of substantially 450 ° of 360 ° plus substantially 90 °, but if at least substantially 360 ° or more, power transmission can be efficiently performed even if a small-diameter drive sheave is used. In addition, when it is necessary to further improve the efficiency of power transmission, the slings 5 coated with resin on the surface may be used.

In each of the embodiments 1 to 4, the elevator car 1 is suspended by the suspension sheave at the upper or lower part of the elevator car 1. Therefore, compared with the prior art that the end part of the sling is fixed on the elevator car by using a sling fixing rod (vertical rod) in the vertical direction as the sling fixing piece and the 1: 1 winding method is adopted, the limitation in the suspension direction is less. In addition, in the above-described embodiments 1 and 3, the sling mount 3 is provided at the lower portion of the elevator car 1, but since the sling mount 3 is provided in the horizontal direction, it is possible to suppress an increase in the height-direction dimension of the hoistway.

Claims (15)

1. An elevator apparatus in which an elevator car and a counter weight in a hoistway are suspended by a hoist rope and driven by a hoist, characterized in that,

the elevator equipment comprises a suspension pulley arranged on the upper part of the elevator cage, a suspension pulley arranged on the upper part of the balance weight and a suspension rope, wherein one end of the suspension rope is fixed by a suspension rope fixing piece of the elevator cage, the other end of the suspension rope extends upwards from the suspension rope fixing piece to an elevator cage side diverting pulley, the suspension pulley which is diverted by the diverting pulley and extends downwards to the elevator cage is diverted by the suspension pulley and extends upwards to a 1 st driving rope side diverting pulley, then the suspension pulley which is diverted by the 1 st driving rope side diverting pulley is coiled above a driving rope pulley of the winch, the suspension pulley which is coiled by 360 degrees on the driving rope pulley extends to a 2 nd driving rope side diverting pulley, the suspension pulley which is diverted by the diverting pulley and extends downwards to the balance weight, and the suspension pulley which is diverted by the suspension pulley and extends upwards to the balance weight side diverting pulley, the winch is turned by the turning pulley, extends downwards and is fixed on a sling fixing piece of the balance weight, and the axial length of the winch is larger than the diameter of the driving rope wheel.

2. Elevator installation according to claim 1,

the 1 st driving sheave side diverting pulley, the 2 nd driving sheave side diverting pulley and the driving sheave are located at substantially the same height, and vertical projections of the first and second diverting pulleys are substantially parallel to each other.

3. An elevator apparatus in which an elevator car and a counter weight in a hoistway are suspended by a hoist rope and driven by a hoist, characterized in that,

the elevator equipment comprises a suspension pulley arranged on the upper part of the elevator cage, a suspension pulley arranged on the upper part of the balance weight and a suspension cable, wherein one end of the suspension cable is fixed by a suspension cable fixing piece of the elevator cage, the other end of the suspension cable extends upwards from the suspension cable fixing piece to an elevator cage side steering pulley, the suspension pulley which is turned by the steering pulley and extends downwards to the elevator cage is turned by the suspension pulley and extends upwards, the suspension pulley which is turned by a driving rope wheel side steering pulley and a driving rope wheel and extends downwards to the balance weight is turned by the suspension pulley and extends upwards to the balance weight side steering pulley, the suspension pulley which is turned by the steering pulley and extends downwards and is fixed on the suspension cable fixing piece of the balance weight, the winding direction on the driving rope wheel side steering pulley is the same as the winding direction on the driving rope pulley, the rope is wound around the drive sheave at an angle of approximately 450 DEG, and the axial length of the hoist is greater than the diameter of the drive sheave.

4. Elevator installation according to claim 3,

the drive sheave side diverting pulley and the drive sheave are located at substantially the same height and have substantially parallel vertical projections with each other.

5. Elevator installation according to claim 3 or 4,

the drive sheave-side diverting pulley is located between a suspension pulley of the elevator car and the drive sheave.

6. Elevator installation according to claim 1 or 3,

the elevator car-side diverting pulley has 2 diverting pulleys.

7. Elevator installation according to claim 1 or 3,

the sling fixing member of the elevator car is provided at a lower portion of the elevator car, and the sling having one end fixed to the sling fixing member extends in a substantially horizontal direction to a suspension sheave provided at a side surface of the lower portion of the elevator car, and is turned by the suspension sheave and then extends upward.

8. Elevator installation according to claim 1 or 3,

the surface of the sling is covered with resin.

9. Elevator installation according to claim 1 or 3,

the radius of the drive sheave is smaller at the axial ends and larger at the axial center.

10. Elevator installation according to claim 9,

the sheave surface of the drive sheave is substantially in the shape of a rotating ellipse or a rotating arc.

11. Elevator installation according to claim 1 or 3,

the radius of the drive sheave is smaller on the main body side of the hoist and larger on the opposite side of the main body side.

12. Elevator installation according to claim 11,

the sheave surface of the drive sheave is substantially in the shape of a truncated cone.

13. Elevator installation according to claim 1 or 3,

the surface of the driving rope wheel is processed by shot blasting or knurling.

14. Elevator installation according to claim 1 or 3,

the sheave surface of the drive sheave is subjected to plating treatment such as nickel plating or chrome plating.

15. Elevator installation according to claim 1 or 3,

the sheave surface of the drive sheave is subjected to shot blasting or knurling and then further subjected to plating such as nickel plating or chromium plating.