HK1093193B - Elevator device - Google Patents

Description

Elevator device

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

As the prior art, an elevator apparatus that suspends an elevator car and a balance weight in a 3: 1 winding manner has been disclosed. For example, in the elevator apparatus disclosed in the first patent document, the tension acting on the suspension rope is reduced to two thirds as compared with the conventional elevator apparatus adopting the 2: 1 winding method, so that the winding torque acting on the drive apparatus is reduced, and as a result, the drive apparatus can be downsized.

Patent document one: japanese patent laid-open No. 2004-83231 (paragraph No. 0023, FIG. 1, FIG. 7, etc.)

However, in the elevator apparatus disclosed in the first patent document, the vertical projection of the end portion of the drive device opposite to the sheave exceeds the vertical projection range of the elevator car. Therefore, when an operator standing on the elevator car needs to repair or exchange the braking portion or the position detector of the drive device from the opposite side of the sheave during maintenance or the like, the space in front of the braking portion or the position detector is narrow, which makes the operation difficult.

Disclosure of Invention

The invention aims to provide an elevator device, which has a small driving device and can conveniently carry out maintenance work of a braking part or a position detector.

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 are driven in a hoistway by a hoist, and the elevator apparatus includes a suspension sheave provided on an upper portion of the elevator car, a rope fixing portion provided on a side portion of the elevator car or a lower portion of a floor, a suspension sheave provided on an upper portion of the counterweight, and a rope fixing portion provided on an upper portion of the counterweight, a vertical projection of the hoist sheave is not overlapped with a vertical projection of the elevator car, a vertical projection of an end portion of a braking portion of the hoist opposite to a sheave is located in the vertical projection of the elevator car, a vertical projection of a center of gravity of the hoist is located near a center of the vertical projections of a pair of guide rails of the counterweight, and the pair of guide rails of the counterweight extends above a rotation shaft of the hoist, the load of the hoist is supported by a pair of guide rails of the balance weight, and the upper portion of the lifting passage is provided with: a first diverting pulley composed of two diverting pulleys whose vertical projections are approximately parallel to each other; a second diverting pulley composed of three diverting pulleys including two second diverting pulleys arranged so that vertical projections thereof are substantially parallel to each other and inclined with respect to a vertical projection of the first diverting pulley, and one second diverting pulley having a vertical projection thereof substantially orthogonal to the two second diverting pulleys; and a third diverting pulley provided on an upper portion of the balance weight, the first diverting pulley, the second diverting pulley and the third diverting pulley being located above the elevator car, vertical projections of the first diverting pulley, a suspension pulley provided on an upper portion of the elevator car, a drive sheave of the hoist and the third diverting pulley being arranged substantially in parallel with each other, one end of the hoist rope being fixed to a rope fixing portion of the elevator car and the other end thereof extending upward from the rope fixing portion of the elevator car, or extending upward from the rope fixing portion of the elevator car via a fourth diverting pulley provided on a floor-side end portion of the elevator car, extending downward after being diverted by the first diverting pulley, extending upward after being diverted by the suspension pulley of the elevator car, and extending downward after being diverted by the second diverting pulley and being wound around a sheave of the hoist, the suspension pulley which passes through the balance weight is deflected and extends upwards, and the suspension pulley passes through a third deflection pulley and is fixed on a sling fixing part of the balance weight.

Further, in the elevator apparatus of the present invention, an elevator car and a counterweight suspended by a rope are driven in a hoistway by a hoist, and the elevator apparatus includes a suspension sheave provided on an upper portion of the elevator car, a rope fixing portion provided on a side portion of the elevator car or a lower portion of a floor, a suspension sheave provided on an upper portion of the counterweight, and a rope fixing portion provided on an upper portion of the counterweight, a vertical projection of the hoist sheave is not overlapped with a vertical projection of the elevator car, a vertical projection of an end portion of a position detector of the hoist opposite to a sheave is located in the vertical projection of the elevator car, a vertical projection of a center of gravity of the hoist is located near a center of the vertical projection of the pair of guide rails of the counterweight, and the pair of guide rails of the counterweight extends above a rotation shaft of the hoist, the load of the hoist is supported by a pair of guide rails of the balance weight, and the upper portion of the lifting passage is provided with: a first diverting pulley composed of two diverting pulleys whose vertical projections are approximately parallel to each other; a second diverting pulley composed of three diverting pulleys including two second diverting pulleys arranged so that vertical projections thereof are substantially parallel to each other and inclined with respect to a vertical projection of the first diverting pulley, and one second diverting pulley having a vertical projection thereof substantially orthogonal to the two second diverting pulleys; and a third diverting pulley provided on an upper portion of the balance weight, the first diverting pulley, the second diverting pulley and the third diverting pulley being located above the elevator car, vertical projections of the first diverting pulley, a suspension pulley provided on an upper portion of the elevator car, a drive sheave of the hoist and the third diverting pulley being arranged substantially in parallel with each other, one end of the hoist rope being fixed to a rope fixing portion of the elevator car and the other end thereof extending upward from the rope fixing portion of the elevator car, or extending upward from the rope fixing portion of the elevator car via a fourth diverting pulley provided on a floor-side end portion of the elevator car, extending downward after being diverted by the first diverting pulley, extending upward after being diverted by the suspension pulley of the elevator car, and extending downward after being diverted by the second diverting pulley and being wound around a sheave of the hoist, the suspension pulley which passes through the balance weight is deflected and extends upwards, and the suspension pulley passes through a third deflection pulley and is fixed on a sling fixing part of the balance weight.

(effect of the invention)

According to the present invention, it is possible to provide an elevator apparatus in which a drive apparatus is small in size and maintenance work of a brake portion or a position detector can be performed easily.

Drawings

Fig. 1 shows a method of winding a rope in an elevator apparatus according to a first embodiment of the present invention.

Fig. 2 is a top cross-sectional view of a hoistway in an elevator apparatus according to a first embodiment of the present invention.

Fig. 3 is a sectional view of a hoisting machine in an elevator apparatus according to a first embodiment of the present invention.

Fig. 4 is a right side view of a hoistway in an elevator apparatus according to a first embodiment of the present invention.

Fig. 5 is a front view of a hoistway in an elevator apparatus according to a first embodiment of the present invention.

Fig. 6 shows a method of winding a rope in an elevator apparatus according to a second embodiment of the present invention.

Fig. 7 is a top cross-sectional view of a hoistway in an elevator apparatus according to a second embodiment of the present invention.

Fig. 8 is an external view of a hoisting machine in an elevator apparatus according to a second embodiment of the present invention.

Fig. 9 is a right side view of a hoistway in an elevator apparatus according to a second embodiment of the present invention.

Fig. 10 is a front view of a hoistway in an elevator apparatus according to a second embodiment of the present invention.

Fig. 11 is a front view of a hoistway in an elevator apparatus according to a third embodiment of the present invention.

In the figure: 1-an elevator car; 2-elevator car doors; 3-a car upper frame; 4. 15, 19-sling fixing part; 5-a sling; 6-sling guide means; 7a, 7 b-a first diverting pulley; 8. 8a, 13 a-suspension pulleys; 9a, 9b, 9 c-a second diverting pulley; 10-thin type hoist; 11. 24-a drive sheave; 12-a balancing weight; 14-a third diverting pulley; 16a, 16 b-elevator car guide rails; 17a, 17 b-guide rails for balance weights; 18-a hoistway wall; 20-a diverting pulley; 21. 25-a braking portion; 22. 26-a position detector; 23-longitudinal hoist.

Detailed Description

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

Fig. 1 shows a method of winding a rope 5 of an elevator apparatus according to a first embodiment of the present invention. Fig. 2 is a cross-sectional plan view of the hoistway in the elevator apparatus according to the present embodiment. Fig. 3 is a sectional view of a hoisting machine in the elevator apparatus according to the embodiment. Fig. 4 is a right side view of the hoistway in the elevator apparatus of the present embodiment. Fig. 5 is a front view of the hoistway in the elevator apparatus according to the present embodiment.

The elevator apparatus of the present embodiment is configured such that the elevator car 1 moves up and down along the elevator car guide rails 16a and 16b, and the counterweight 12 moves up and down along the counterweight guide rails 17a and 17 b. The elevator car 1 and the counterweight 12 are suspended by a suspension rope 5 and driven by a thin hoist 10. Here, the thin hoist means a hoist whose length in the direction of the rotation axis is smaller than that in the direction orthogonal to the direction of the rotation axis. The depth direction of the elevator car 1 is a direction perpendicular to the elevator car doors 2, and the direction of the hoistway away from the elevator car doors 2 is referred to as the rear direction. The right-hand part of the elevator car 1 refers to the part located on the right side of the elevator car 1 seen from the elevator lobby side.

In addition, a car upper frame 3 is provided in a ceiling portion of the elevator car 1, and a suspension sheave 8 is mounted on the car upper frame 3. Further, a sling fixing part 4 is provided near the car floor at the right side part of the elevator car 1. Further, the upper portion of the balance weight 12 is also provided with a sling fixing portion 15 and a hanging sheave 13. The sling fixing parts 4 and 15 have a function of absorbing the tension of the sling 5.

Further, in the upper part of the elevating path, first diverting pulleys 7a and 7b composed of two diverting pulleys having vertical projections substantially parallel to each other, second diverting pulleys 9a and 9b having vertical projections substantially parallel to each other, a second diverting pulley 9c having a vertical projection substantially orthogonal to the vertical projection of the second diverting pulleys 9a and 9b, and a third diverting pulley 14 are provided. Here, vertical projections of the first diverting pulleys 7a and 7b, the suspension sheave 8, the drive sheave 11 of the thin hoist 10, and the third diverting pulley 14 are set substantially parallel to each other. Moreover, the perpendicular projection of the second diverting pulleys 9a and 9b is set to be oblique with respect to the perpendicular projection of the first diverting pulleys 7a and 7 b. And all diverting pulleys are located above the ceiling portion of the elevator car 1. Further, since the rope fixing portions 4, the diverting pulleys 7a and 7b, and the suspending pulleys 8 are provided with the adjusting clearances in the left-right direction of fig. 2, respectively, and the positions thereof can be adjusted, the suspending state of the elevator car 1 can be adjusted at the time of installation work.

The method of winding the hoist rope 5 of the elevator apparatus of the present embodiment will be described below, the elevator apparatus of the present embodiment basically uses a 3: 1 winding method to suspend the elevator car 1 and the counterweight 12 by means of the hoist rope fixing parts 4, 15, the suspension pulleys 8, 13. in the concrete method shown in fig. 1, first, one end of the hoist rope 5 is fixed to the hoist rope fixing part 4 located in the vicinity of the car floor in the right side part of the elevator car 1, and the other end extends upward from the hoist rope fixing part 4, extends from the first diverting pulley 7a substantially in the horizontal direction to the other first diverting pulley 7b, then extends downward after being diverted by the first diverting pulley 7b, and thereafter, the other end of the hoist rope 5 extends upward after being diverted by the suspension pulley 8 in the upper part of the elevator car 1, winds around the upper part of the second diverting pulley 9a, winds around the upper part of the other second diverting pulley 9b and extends downward after being diverted, and is wound around the lower part of the third second diverting pulley 9c, and then is turned to extend upward around the drive sheave 11 of the thin hoist 10 and extends downward, and thereafter, the other end of the hoist rope 5 is turned to extend upward through the suspending pulley 13 on the upper part of the balance weight 12, passes through the third diverting pulley 14, reaches the hoist rope fixing part 15 on the upper part of the balance weight 12, and is fixed to the hoist rope fixing part 15.

The thin hoist 10 is disposed such that a part of its vertical projection is located between the vertical projection of the elevator car 1 and the vertical projection of the hoistway wall 18, and the vertical projection of the remaining part of the thin hoist 10 overlaps the vertical projection of the elevator car 1. As shown in fig. 2 and 3, a motor composed of a stator 27 and a rotor 28 is provided on the side close to the hoistway wall 18 inside the hoist, and a braking portion 21 and a position detector 22 are provided on the opposite side of the motor via the drive sheave 11.

In the present embodiment, the counterweight 12 is disposed behind the elevator car 1, and a part of the vertical projection of the thin hoist 10 is positioned so as to overlap the vertical projection of the counterweight 12. Further, since the vertical projection of the center of gravity of the thin hoist 10 is positioned close to the position between the vertical projections of the pair of guide rails 17a and 17b of the counterweight 12, the load of the thin hoist 10 can be supported by the pair of guide rails 17a and 17b of the counterweight 12 by a support member, not shown.

According to the present embodiment as described above, since the 3: 1 winding method is adopted and the suspending load is distributed among the three slings, the suspending load acting on the diverting pulley can be reduced and the thin hoist 10 with a small moment can be used. That is, since the strength member of the elevator apparatus and the thin hoist 10 can be reduced in size, the manufacturing cost can be reduced.

Further, the position of the thin hoist 10 can be adjusted by providing the second diverting pulleys 9a, 9b, and 9 c. Therefore, in the present embodiment, the position of the thin hoist 10 is adjusted so that the vertical projection of the drive sheave 11 does not overlap the vertical projection of the elevator car 1, and the vertical projection of the end of the braking portion 21 opposite to the drive sheave 11 is positioned within the vertical projection of the elevator car 1. Thus, since the braking portion 21 of the thin hoist 10 is disposed to face a wide space in the hoistway, the maintenance work of the braking portion 21 can be conveniently performed. Similarly, since the vertical projection of the end of the position detector 22 opposite to the drive sheave 11 is also located within the vertical projection of the elevator car 1, the front surface of the position detector 22 of the thin-type hoist 10 is a wide space, and therefore, the maintenance operation of the position detector 22 can be performed easily. Further, since the work can be performed in the vicinity of the brake part 21 and the position detector 22, it is not necessary to extend the body outward, and therefore, the maintenance work is convenient and safe.

Further, according to the present embodiment, since the vertical projection of the position detector 22 is located within the vertical projection of the elevator car 1, there is also an advantage that, when the maintenance work of the position detector 22 is performed, even if a component is inadvertently dropped, the possibility that the component is dropped on the upper portion of the elevator car 1 is considerably higher than the possibility that the component is dropped on the bottom of the hoistway.

Fig. 6 shows a method of winding a rope 5 of an elevator apparatus according to a second embodiment of the present invention. Fig. 7 is a top sectional view of the hoistway in the elevator apparatus according to the present embodiment. Fig. 8 is an external view of a hoisting machine in the elevator apparatus according to the present embodiment. Fig. 9 is a right side view of the hoistway in the elevator apparatus of the present embodiment. Fig. 10 is a front view of a hoistway in the elevator apparatus of the present embodiment. Since the structure of the elevator apparatus of the present embodiment is basically the same as that of the first embodiment, the difference from the first embodiment will be described here.

In the present embodiment, the thin hoist 10 used in the first embodiment is modified to a vertically long hoist 23. Here, the longitudinal hoist means a hoist having a length in the rotation axis direction longer than a length in a direction orthogonal to the rotation axis direction.

As shown in fig. 7 and 8, a drive sheave 24 is provided on the side close to the hoistway wall 18 inside the hoist, and a brake portion 25 and a position detector 26 are provided on the opposite side of the drive sheave 24 with the motor interposed therebetween.

According to the present embodiment, the same effects as those of the first embodiment are obtained in the maintenance operation of the vertically long winch 23. Further, since the vertical projection of the braking portion 25 is located within the vertical projection of the elevator car 1 in addition to the vertical projection of the position detector 26, there is an advantage that, even if the component is inadvertently dropped during maintenance work of the position detector 26 and the braking portion 25, the component is more likely to drop on the upper portion of the elevator car 1 than on the bottom portion of the hoistway.

Fig. 11 is a front view of a hoistway in an elevator apparatus according to a third embodiment of the present invention. Since the structure of the elevator apparatus of the present embodiment is basically the same as that of the second embodiment, the difference from the second embodiment will be described here.

In this embodiment the rope fixing part 19 is provided in the lower part of the floor of the elevator car 1 and the fourth diverting pulley 20 is provided in the right-hand end of the floor of the elevator car 1.

A method of winding the rope 5 of the elevator apparatus in the present embodiment will be described below. First, one end of the hoisting rope 5 is fixed to a hoisting rope fixing part 19 located in the lower part of the car floor of the elevator car 1, and the other end extends from the hoisting rope fixing part 19 to a fourth diverting pulley 20 located at the end of the floor of the elevator car 1, and after being diverted by the fourth diverting pulley 20, extends upwards along the side of the elevator car 1 to the first diverting pulley 7 a. The method of winding the hoist rope 5 after the first diverting pulley 7a is the same as that of the other embodiments.

According to the present embodiment, basically the same effects as those of the second embodiment are obtained. In the present embodiment, since the rope fixing portion 19 of the suspension rope 5 is oriented substantially in the horizontal direction, even when the length of the rope fixing portion 19 needs to be increased, the vertical dimension of the rope fixing portion 19 can be shortened, and the vertical dimension of the equipment disposed below the floor of the elevator car 1 can be substantially limited to the diameter of the diverting pulley 7 a. Therefore, since the vertical dimension of the elevator car 1 can be reduced as compared with the second embodiment, when the elevator apparatus is installed in the hoistway having the same shape, the elevator car 1 can be ensured to have a longer effective elevating stroke as compared with the second embodiment. Further, as compared with the second embodiment, the point of application of force from the hoist rope 5 to the lower part of the elevator car 1 is distributed to the two parts of the hoist rope fixing part 19 and the diverting pulley 20, so that the concentration of force can be effectively distributed.

Claims (4)

1. An elevator apparatus for driving an elevator car and a balance weight suspended by a rope in a hoistway by a hoist, characterized in that,

the elevator car comprises a suspension pulley arranged on the upper part of the elevator car, a sling fixing part arranged on the side part of the elevator car or the lower part of the floor, a suspension pulley arranged on the upper part of the balance weight, and a sling fixing part arranged on the upper part of the balance weight, wherein the vertical projection of the hoist rope pulley is not overlapped with the vertical projection of the elevator car, the vertical projection of the end part of the hoisting machine braking part opposite to a rope pulley is positioned in the vertical projection of the elevator car, the vertical projection of the gravity center of the hoisting machine is positioned near the center of the vertical projection of a pair of guide rails of the balance weight, the pair of guide rails of the balance weight extend to the upper part of the rotating shaft of the hoisting machine, and the load of the hoisting machine is supported by the pair of guide rails of the balance weight,

the upper part of the lifting channel is provided with: a first diverting pulley composed of two diverting pulleys whose vertical projections are approximately parallel to each other; a second diverting pulley composed of three diverting pulleys including two second diverting pulleys arranged so that vertical projections thereof are substantially parallel to each other and inclined with respect to a vertical projection of the first diverting pulley, and one second diverting pulley having a vertical projection thereof substantially orthogonal to the two second diverting pulleys; and a third diverting pulley arranged on the upper part of the balancing weight,

the first diverting pulley, the second diverting pulley and the third diverting pulley are located above the elevator car,

the vertical projections of the first diverting pulley, the suspension pulley provided at the upper part of the elevator car, the drive sheave of the hoisting machine, and the third diverting pulley are set to be substantially parallel to each other,

one end of the sling is fixed on a sling fixing part of the elevator car, and the other end of the sling extends upwards from the sling fixing part of the elevator car, or extends upwards from the sling fixing part of the elevator car after passing through a fourth diverting pulley arranged at the end part of the floor of the elevator car, extends downwards after diverting by a first diverting pulley, extends upwards after diverting by a suspension pulley of the elevator car, winds on a rope pulley of the winch and extends downwards after diverting by a second diverting pulley, extends upwards after diverting by a suspension pulley of the balance weight, and is fixed on the sling fixing part of the balance weight after passing through a third diverting pulley.

2. An elevator apparatus for driving an elevator car and a balance weight suspended by a rope in a hoistway by a hoist, characterized in that,

the elevator hoist comprises a suspension pulley disposed on the upper part of the elevator car, a sling fixing part disposed on the side part of the elevator car or the lower part of the floor, a suspension pulley disposed on the upper part of the balance weight, and a sling fixing part disposed on the upper part of the balance weight, wherein the vertical projection of the hoist rope pulley is not overlapped with the vertical projection of the elevator car, the vertical projection of the end part of the position detector of the hoist opposite to the rope pulley is positioned in the vertical projection of the elevator car, the vertical projection of the gravity center of the hoist is positioned near the center of the vertical projection of the pair of guide rails of the balance weight, the pair of guide rails of the balance weight extend to the upper part of the rotation axis of the hoist, and the load of the hoist is supported by the pair of guide rails of the balance weight,

the upper part of the lifting channel is provided with: a first diverting pulley composed of two diverting pulleys whose vertical projections are approximately parallel to each other; a second diverting pulley composed of three diverting pulleys including two second diverting pulleys arranged so that vertical projections thereof are substantially parallel to each other and inclined with respect to a vertical projection of the first diverting pulley, and one second diverting pulley having a vertical projection thereof substantially orthogonal to the two second diverting pulleys; and a third diverting pulley arranged on the upper part of the balancing weight,

the first diverting pulley, the second diverting pulley and the third diverting pulley are located above the elevator car,

the vertical projections of the first diverting pulley, the suspension pulley provided at the upper part of the elevator car, the drive sheave of the hoisting machine, and the third diverting pulley are set to be substantially parallel to each other,

one end of the sling is fixed on a sling fixing part of the elevator car, and the other end of the sling extends upwards from the sling fixing part of the elevator car, or extends upwards from the sling fixing part of the elevator car after passing through a fourth diverting pulley arranged at the end part of the floor of the elevator car, extends downwards after diverting by a first diverting pulley, extends upwards after diverting by a suspension pulley of the elevator car, winds on a rope pulley of the winch and extends downwards after diverting by a second diverting pulley, extends upwards after diverting by a suspension pulley of the balance weight, and is fixed on the sling fixing part of the balance weight after passing through a third diverting pulley.

3. Elevator arrangement according to claim 1 or 2,

the hoist is a thin hoist.

4. Elevator arrangement according to claim 1 or 2,

the hoist is a longitudinal hoist.