JP2004001911A - Lifting device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a space occupied by the whole of a winding-up machine narrow in the case where a plurality of driving ropes are unwound in a plurality of directions, to miniaturize a guide pulley and to make a winding-up/unwinding action of the driving rope by the winding-up machine stable. <P>SOLUTION: The driving ropes 7a, 7b for lifting a car are constituted by flat ropes of a flat cross section in which a core material comprising metal or synthetic fiber is buried in a synthetic resin. Winding bodies 11a, 11b of the winding-up machine 6 are coaxially arranged in series and the driving ropes 7a, 7b are superposed and wound on the respective winding bodies 11a, 11b respectively. Since the respective driving ropes 7a, 7b are radially wound, axis length of the respective winding bodies 11a, 11b becomes short. Since the total length of the winding bodies 11a, 11b becomes short and the one winding-up machine is only used, the occupied space of the winding-up machine becomes small. Since the driving ropes 7a, 7b are radially superposed and wound, an unwinding position of the ropes 7a, 7b is not varied in an axial direction. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The invention of this application relates to a lift device for raising and lowering an elevator car.
[0002]
[Prior art]
2. Description of the Related Art As an elevator elevating device, there is a so-called winding drum type in which one end of a driving rope is wound around a winding drum of a hoist, and a car is raised and lowered by driving and rotating the winding drum.
[0003]
There are two types of hoisting machines, one in which the hoist is installed on the car side and the other in the hoistway side. The size can be reduced, and due to such advantages, it is mainly used for small elevators mainly for residential use.
[0004]
[Problems to be solved by the invention]
However, in this conventional elevating device, a twisted rope having a round cross section is used as a drive rope, so that the drive rope cannot be wound around the winding drum of the hoisting machine. The size, especially the length in the axial direction, is inevitably increased. In addition, in order to raise and lower the elevator car in a well-balanced manner, it is desirable to extend a plurality of drive ropes similarly to the left and right or back and forth, and to suspend the car with the plurality of drive ropes. If this is attempted, the space occupied by the hoisting machine will increase. Therefore, when the hoist is installed on either the car side or the hoistway side, the space occupied by the hoist becomes large, and the hoistway cannot be sufficiently reduced in size.
[0005]
Further, the outer diameter of the guide pulley of each part where the drive rope is bridged cannot be reduced to a certain degree or more because the drive rope having a round cross section is used. In other words, the outer diameter of the guide pulley of each part is related to the outer diameter of the driving rope, and there are safety regulations such as, for example, that the outer diameter of the driving rope must be 40 times or more the substantial outer diameter of the driving rope. Since the outer diameter of the rope cannot be reduced, there is a limit in reducing the diameter of the drive pulley. For this reason, in the conventional elevating device, the guide pulley occupies a large space, and this also contributes to the inability to sufficiently reduce the size of the hoistway.
[0006]
In addition, in the case of the conventional lifting device, since the driving rope is wound around the winding drum of the hoist for a long time in the axial direction as described above, the driving rope is wound around the winding rope at the time of winding or feeding the driving rope. Shaking greatly in the axial direction, and the shaking tends to cause generation of vibration noise and reduction in ride quality.
[0007]
Therefore, the invention of this application makes it possible to reduce the space occupied by the entire hoist and to reduce the size of the guide pulley when a plurality of drive ropes are fed out in a plurality of directions, and at the same time, to wind up and feed out the drive ropes by the hoist. An object of the present invention is to provide an elevator elevating device capable of stabilizing the operation, further reducing the size of the hoistway, improving quietness, and improving ride comfort.
[0008]
[Means for Solving the Problems]
As means for solving the above-described problems, the invention of this application is directed to an elevator elevating device that raises and lowers an elevator car by feeding a plurality of drive ropes in a plurality of directions by a hoist, A core member made of metal or synthetic fiber is embedded in a synthetic resin, and is constituted by a flat rope having a flat cross section. A plurality of winding drums corresponding to the respective drive ropes are serially arranged on a shaft of one hoist. And the drive ropes are radially overlapped with the corresponding winding drum.
[0009]
In the case of the present invention, the car can be stably moved up and down by a plurality of drive ropes pulled out from the winding drum of one hoist, but each drive rope is a flat rope having a flat cross section and has a radial direction. Since the layers of adjacent ropes are always in stable contact with each other over a wide surface, winding and feeding of the rope onto the winding drum can be performed stably without incurring mutual displacement or entanglement. Since the drive rope is radially overlapped with each winding drum of the hoist, the width of each winding drum may be slightly larger than the width of the driving rope, and therefore, a plurality of winding drums are arranged in series. Nevertheless, the overall length of the winding drum can be kept short. Further, since the drive rope has a flat cross section and can be bent at a relatively large curvature, the outer diameter of the winding drum and the guide pulley of each part can be reduced. Furthermore, since each drive rope is wound around the winding drum in the radial direction, the rope does not fluctuate in the axial direction of the winding drum at the time of winding or feeding. For this reason, the guide pulley for guiding the drive rope pulled out from the winding drum does not need to be a movable type that can be moved in the axial direction.
[0010]
At this time, a pair of drive ropes may be provided, the drive ropes may be wound around the corresponding winding drum in the same winding direction, and both drive ropes may be drawn out from opposite directions. In this case, the load acting on the shaft of the hoist from each drive rope always acts in a direction that cancels each other out, so that the rotational balance of the hoist becomes good and as a result, the elevator operation of the car is stable. At the same time, the durability of the hoist is improved.
[0011]
The above hoist may be installed in a car. In this case, since the feeding position of the drive rope from the hoist does not fluctuate, it is possible to reliably prevent the car from swinging due to the fluctuation of the feeding position.
[0012]
Further, the above hoisting machine may be installed on the hoistway side. In this case, the weight of the car can be reduced by not installing the hoist on the car side, and the load on the hoist accompanying the operation can be reduced.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the invention of this application will be described with reference to the drawings.
[0014]
First, a first embodiment shown in FIGS. 1 to 4 will be described.
[0015]
FIGS. 1 and 2 schematically show an elevator employing a lifting device 1 according to the invention of the present application. In the drawings, reference numeral 2 denotes an elevator hoistway, and reference numeral 3 denotes a guide rail in the hoistway 2. 4 is an elevator car that is guided up and down to operate. At the center of the lower surface of the car 3, a hoisting machine 6 for driving and rotating a pair of winding drums 11a and 11b is fixedly installed. Drive ropes 7a and 7b are wound around the respective winding drums 11a and 11b of the hoisting machine 6. I have. The winding drums 11a and 11b are integrally formed to have the same diameter and to be coaxially arranged in series. The ends of the drive ropes 7a, 7b drawn out from the winding drums 11a, 11b are wrapped around guide pulleys 8, 8 provided on both sides of the lower end of the car 3, and are drawn further upward to form the upper wall of the hoistway 2. Fixed to.
[0016]
The drive ropes 7a and 7b are not ordinary twisted ropes having a round cross section, but as shown in FIG. 3, flat ropes having a flat cross section formed by embedding a core material 9 made of metal or synthetic fiber in a synthetic resin 10. It is constituted by.
[0017]
Further, in the hoisting machine 6, the drive ropes 7a and 7b are wound radially around the respective winding drums 11a and 11b arranged coaxially in series as shown in FIG. The drive ropes 7a, 7b are wound around the winding drums 11a, 11b in the same winding direction, and are drawn in opposite directions toward the left and right guide pulleys 8, 8. Specifically, one drive rope 7a is pulled out from the upper end side of the winding drum 11a toward the guide pulley 8, and the other drive rope 7b is pulled out from the lower end side of the winding drum 11b toward the guide pulley 8 on the opposite side. Have been. Therefore, as long as the same tension acts on the drive ropes 7a and 7b, the forces act on the blocks of the winding drums 11a and 11b so as to cancel each other.
[0018]
The winding drums 11 a and 11 b of the hoisting machine 6 are driven to rotate by an electric motor 12. The hoisting machine 6 is provided with a brake 14 which can be attached to and detached from the brake drum 5 integrated with the winding drums 11a and 11b. The operation of the brake 14 appropriately controls the rotation of the winding drums 11a and 11b. Power is provided.
[0019]
The rotation speeds of the winding drums 11a and 11b are detected by an encoder 13 shown in FIG. 4, and a controller (not shown) controls the operation of the motor 12 and the brake 14 appropriately based on the detected values, thereby raising and lowering the car 3. The speed is adjusted to be almost constant.
[0020]
Since the elevator device 1 of the elevator is configured as described above, when the car 3 is raised, the winding drums 11a and 11b are rotated by the drive of the motor 12 of the hoisting machine 6, whereby the respective winding drums 11a and 11b are rotated. The drive ropes 7a and 7b are wound around the groove 11b. As a result, the length of suspension of the drive ropes 7 a and 7 b from the upper part of the hoistway 2 is reduced, and the car 3 moves up along the guide rail 4. When the car 3 is lowered, the drive of the winding drums 11a and 11b is released while controlling the brake 14 of the hoisting machine 6, and the driving ropes 7a and 7b from the winding drums 11a and 11b are released by the weight of the car 3. To increase the payout length. Thereby, the suspension length of the drive ropes 7a and 7b from the upper part of the hoistway 2 is extended, and the car 3 descends along the guide rail 4.
[0021]
The lifting device 1 operates as described above, but a flat rope is used as the driving ropes 7a and 7b, and the ropes 7a and 7b are wound around the winding drums 11a and 11b of the hoisting machine 6 installed in the car 3. , The axial length of the winding drums 11a and 11b can be greatly reduced, and the diameter of the winding portion of the winding drums 11a and 11b can be very small. . In other words, the flat rope can sufficiently withstand the strength of a winding having a small thickness and a large curvature, so that the diameter of the wound portion is smaller than that in the case of using a twisted rope having a round cross section. Can be very small.
[0022]
In the case of the elevating device 1, since the shaft length of each of the winding drums 11a and 11b is reduced by adopting the flat rope as described above, the winding length of the winding drum 11a becomes too long to be impossible. , 11b can be realized in series, whereby a pair of drive ropes 7a, 7b can be pulled out by one hoisting machine 6 in different directions. For this reason, the space occupied by the entire hoisting machine 6 is significantly reduced as compared with the conventional hoisting machine, which requires a plurality of hoisting machines to pull out and operate the pair of drive ropes in different directions. Can be. Therefore, when this hoisting device 1 is employed, the amount of protrusion of the hoisting machine 6 from the car 3 can be reduced, and the hoistway 2 itself can be reduced in size.
[0023]
In addition, in the case of the lifting device 1, since the driving ropes 7a and 7b employ flat ropes, the other guide pulleys 8 and 8 around which the ropes 7a and 7b are wound also have the same reason as in the case of the winding drums 11a and 11b. The outer diameter can be reduced, and the space occupied by the guide pulleys 8, 8 in the hoistway 2 can also be reduced.
[0024]
The hoisting device 1 is a so-called self-propelled type in which the hoisting machine 6 is mounted on the car 3 side. This mounting method itself has a characteristic that vibration noise of the hoisting machine 6 is hardly transmitted to the hoistway 2 side. However, in particular, in the case of the hoisting / lowering device 1, the driving ropes 7a and 7b can be wound up and extended by the hoisting machine 6 stably, so that the quietness can be further improved and the riding comfort performance can be improved. Can also be improved. That is, since the lifting device 1 employs a structure in which the driving ropes 7a, 7b are radially wound around the winding drums 11a, 11b, the ropes 7a, 7b are used for winding and unwinding the driving ropes 7a, 7b. Does not fluctuate in the axial direction of the winding drums 11a and 11b, so that the driving ropes 7a and 7b do not greatly swing during operation, and noise and deterioration in riding comfort due to the rope vibrations do not occur. . In particular, when the hoisting machine 6 is installed on the car 3 side as in this embodiment, the fluctuation of the feed-out position of the driving ropes 7a, 7b on the winding drums 11a, 11b directly changes the swing of the car 3 before and after. Although it is easy to invite, it is possible to reliably eliminate such a problem.
[0025]
When the hoisting machine 6 is installed at the center of the car 3 as in this embodiment, the balance of the car 3 can be optimized.
[0026]
Further, in the device 1 of this embodiment, since the feeding position of the driving ropes 7a, 7b does not fluctuate in the axial direction of the winding drums 11a, 11b, the guide is provided like a conventional one using a twisted rope having a round cross section. There is no need for the pulley to have an axially variable structure. Therefore, the structure of the guide pulley 8 can be simplified to further reduce the occupied space and reduce the manufacturing cost.
[0027]
Further, in the case of the apparatus 1 of this embodiment, the driving ropes 7a, 7b are wound around the winding drums 11a, 11b coaxially arranged in series in the same winding direction, and the respective driving ropes 7a, 7b are wound from the winding drums 11a, 11b. Since the structure of pulling out the right and left opposite directions is adopted, the force of each drive rope 7a, 7b can be applied to the blocks of the winding drums 11a, 11b so as to cancel each other. Shafts and bends do not occur in the shaft, so that the rotation of the motor can be stabilized and the durability of the motor 12 can be improved.
[0028]
In the apparatus 1 of this embodiment, since the hoisting machine 6 is mounted on the car 3 side, a flood sensor is installed in a pit in the hoistway 2 so that the hoist 6 It is also possible to control hoisting so as not to be immersed.
[0029]
In the above, the embodiment in which the hoisting machine 6 is installed on the car 3 side has been described. However, the invention of this application is not limited to this, and as in the second embodiment shown in FIGS. The upper machine 6 may be installed on the hoistway 2 side. 5 to 7, the same parts as those in the first embodiment are denoted by the same reference numerals.
[0030]
The hoisting device 101 of this embodiment has the same basic structure of the hoisting machine 6 and the drive ropes 7a and 7b as in the first embodiment, but the hoisting machine 6 is mounted on the base frame 20 on the pit of the hoistway 2. The drive ropes 7a, 7b are fixedly installed, and are pulled out upward through guide pulleys 8, 8 at both ends of the base frame 20, and then are driven through another guide pulley 21, 21 above the hoistway 2. 3.
[0031]
The elevating device 101 has a first embodiment having a structure of driving ropes 7a and 7b composed of flat ropes, a structure in which the ropes 7a and 7b are overlapped with the winding drums 11a and 11b, a structure in which the winding drums 11a and 11b are arranged in series, and the like. The same operation and effect as those described above can be obtained, but the weight of the car 3 is reduced by not installing the hoisting machine 6 on the car 3, and the motor output and brake holding force of the hoisting machine 6 required for the operation of the car 3 are reduced. There are advantages that can be done. Further, since the hoisting machine 6 is installed on the pit, it is advantageous in terms of maintenance.
[0032]
【The invention's effect】
As described above, the invention of this application is such that a plurality of winding drums are arranged in series on a shaft of one hoist, and a plurality of drive ropes are pulled out in a plurality of directions by one hoist. The drive ropes are composed of flat ropes and are superposed and wound around the corresponding winding drum in the radial direction.Therefore, it is possible to reduce the number of drive ropes in a single hoisting machine without extremely increasing the overall length of the winding drum. The operation can be realized, and the space occupied by the entire hoist including the winding drum can be reliably reduced. Further, since a flat rope capable of increasing the curvature of bending is employed, not only the diameter of the winding drum but also the diameter of the guide pulley can be reduced. Therefore, it is possible to further reduce the size of the hoistway.
[0033]
Further, in the invention of this application, since the drive rope is wound around each winding cylinder, it is possible to eliminate the axial fluctuation of the drive rope feeding position due to the operation of the hoist. The swing of the drive rope due to the operation is eliminated, and the quietness at the time of operation and the riding comfort can be improved. In addition, since there is no axial fluctuation of the drive rope feed-out position, it is not necessary to adopt a type of guide pulley for guiding the drive rope that can be varied in the axial direction, thereby simplifying the structure of the guide pulley. Thus, the occupied space can be further reduced and the manufacturing cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a sectional view taken along the line AA of FIG. 2 showing a first embodiment of the present invention;
FIG. 2 is an internal front view of the hoistway according to the embodiment when the shaft is cut vertically.
FIG. 3 is an exemplary perspective view showing the drive rope of the embodiment with a part broken away;
FIG. 4 is a perspective view of the hoist showing the embodiment.
FIG. 5 is an internal front view of a shaft according to a second embodiment of the present invention when the shaft is cut vertically.
FIG. 6 is a sectional view of the same embodiment, taken along line BB of FIG. 5;
FIG. 7 is an exemplary sectional view of the same embodiment taken along line CC of FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Elevating device 3 ... Basket 6 ... Hoisting machine 7a, 7b ... Drive rope 11a, 11b ... Winding drum

Claims (4)

In an elevator elevating device that raises and lowers an elevator car by feeding out a plurality of drive ropes in a plurality of directions by a hoist,
Each of the drive ropes is constituted by a flat rope having a flat cross section formed by embedding a core material made of metal or synthetic fiber in a synthetic resin, and a plurality of winding drums corresponding to each of the drive ropes are wound up by one unit. An elevator hoisting and lowering device, wherein the drive ropes are arranged in series on a shaft of the machine, and each of the drive ropes is radially overlapped and wound around a corresponding winding drum. 2. The elevator device according to claim 1, wherein a pair of the driving ropes is provided, and the driving ropes are wound around corresponding winding drums in the same winding direction, and both driving ropes are drawn out from opposite directions. 3. . The elevator hoisting device according to claim 1 or 2, wherein the hoist is installed in a car. The elevator hoisting device according to claim 1 or 2, wherein the hoist is installed on a hoistway side.

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