HK1152921A - Double-deck elevator apparatus - Google Patents

Description

Double-deck elevator equipment

Technical Field

The invention relates to a double-deck elevator installation with two elevator cars one above the other in an elevator car frame.

Background

A double-deck elevator having two elevator cars, one above the other, in an elevator car frame is configured such that a drive unit is provided in an upper part of an upper car, a rope is wound around a sheave provided below the upper car and a sheave provided below the lower car, which are connected to the drive unit by a rope, and the upper car and the lower car are driven by the drive unit.

As a conventional detection device for detecting an abnormality of a rope for driving an upper car and a lower car used in a double-deck elevator having the above-described structure, for example, patent document 1 discloses a device in which a detection roller that abuts against the rope is provided below the elevator car, and the detection roller is displaced when the rope is abnormally loosened or cut, thereby operating an emergency braking device (for example, see patent document 1). For example, patent document 2 discloses a device that operates a detection plate by dropping a sleeve of a cut rope, and that can detect the cut rope even when only one of a plurality of ropes is cut (for example, see patent document 2). Further, for example, patent document 3 discloses a configuration in which detection switches are provided in respective ropes, and when an abnormality occurs in a rope, the deflection of a spring due to the abnormality of the rope is detected by the detection switches (for example, see patent document 3).

Patent document 1: japanese patent laid-open No. 2007 & 331871 (paragraphs 0021 to 0023, FIG. 4)

Patent document 2: japanese Kokai publication Sho-55-32381 (FIG. 2)

Patent document 3: japanese Kokai publication Sho 59-173671 (FIG. 2)

However, in the solution disclosed in patent document 1, for example, when one of the plurality of ropes is abnormal, for example, when a predetermined rope is cut, the position of the detection roller is supported by the other ropes still in a tensioned state, and therefore there is a problem that the rope abnormality may not be detected. As a result, there are problems that the elevator continues to run in a state where the rope is abnormal, which causes a serious situation, and that the emergency braking device is activated when the abnormality is detected, which causes the elevator to fall into a state where the elevator cannot run, which requires a lot of time for recovery work.

Further, in the proposal disclosed in patent document 2, although it is possible to detect a rope cutting abnormality in principle even when only one of the plurality of ropes is cut, there is a possibility that the rope end portion does not fall and the rope cutting abnormality cannot be detected when the cutting position of the rope is farther than the abnormality detection position in terms of distance and the weight of the rope on the opposite side across the hoisting machine is heavier.

Further, in the proposal disclosed in patent document 3, since it is necessary to provide a detection switch at an end of each rope, the number of parts increases, and the circuit configuration becomes complicated.

Disclosure of Invention

The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a double-deck elevator car facility capable of reliably detecting an abnormality of an upper car and a lower car driving rope without providing a special device.

In order to achieve the above object, the present invention provides a double-deck elevator apparatus having: an upper car and a lower car movable in opposite directions in an up-down direction within an elevator car frame; a drive unit for driving the upper car and the lower car; pulleys provided on the upper car and the lower car, respectively; a plurality of ropes wound around the sheave and the pulley of the drive unit; a plurality of sleeves (sockets) which receive and secure the ends of the cords; a plurality of rod members connected with the sleeves; a hanger plate through which the bar members pass; a plurality of nuts screwed with the rod member; and a plurality of springs provided between the nuts and the hanger plate, wherein a detection plate provided to be movable in a vertical direction and a switch for detecting a displacement of the detection plate are provided on an upper portion of the nuts, and when an abnormality occurs in the rope, the springs are extended to press the detection plate upward by the nuts, and the switch is operated to detect the abnormality in the rope.

According to the present invention having the above-described configuration, when the rope is broken or slackened for some reason, the spring provided at the end of the rope is expanded in a non-loaded state or the load applied to the spring is reduced. As the spring is extended, the detection plate is pressed upward by the nut, and the switch detects the displacement of the detection plate, thereby detecting an abnormality of the rope. Therefore, the abnormality of the plurality of ropes can be detected simultaneously by the detection plate provided at the upper portion of the nut and the switch for detecting the displacement of the detection plate, and the abnormality can be detected reliably even when only one rope is abnormal.

Further, the double deck elevator apparatus of the present invention is characterized in that the detection plate is supported by a sliding unit.

According to the present invention having the above-described configuration, when the spring is extended due to an abnormality of the rope and the detection plate supported by the slide unit is pressed upward by the nut, the detection plate supported by the slide unit can be smoothly displaced, and thus the abnormality of the rope can be reliably detected.

The double deck elevator system according to the present invention is characterized in that the detection plate is rotatably supported by a shaft provided at one end of the detection plate.

According to the present invention having the above-described configuration, when the spring is extended due to an abnormality of the rope and the detection plate rotatably supported by the shaft is pressed upward by the nut, the detection plate rotatably supported by the shaft can be smoothly displaced, and thus the abnormality of the rope can be reliably detected.

Effects of the invention

According to the present invention, even if an abnormality occurs in only one of the plurality of ropes, the abnormality can be reliably detected, and thus the safety of the passenger can be ensured. In particular, since the length of the rope for driving the upper car and the lower car in the double-deck elevator is short, the inertial force of the rope is small, and therefore, the time from the occurrence of an abnormality in the rope to the detection of the abnormality can be shortened, and measures can be taken against the abnormality quickly.

Drawings

Fig. 1 is a schematic view of the overall structure of a double-deck elevator to which the present invention is applied.

Fig. 2 is a schematic structural view of a main part of a double deck elevator to which the present invention is applied.

Fig. 3 is a front view showing a first embodiment of a double deck elevator system according to the present invention.

Fig. 4 is a front view showing a state in which the detection plate is pressed upward by the extension of the spring due to the abnormality of the rope.

Fig. 5 is a flowchart showing the processing procedure of the double-deck elevator system according to the present invention.

Fig. 6 is a front view showing a second embodiment of the double deck elevator system according to the present invention.

Fig. 7 is a front view showing a third embodiment of a double deck elevator system according to the present invention.

Description of the symbols:

1 lifting channel

2 Elevator car frame

3 Main sling

4 balance weight

5 mechanical chamber

6 drive device

7 diverting pulley

8 control device

9 Cable

10 guide member

11 guide rail

12 upper car

13 lower part cage

14 guide rail

15 drive unit

16 sleeve

17 Pin

18 bar component

19 hanger plate

20a, 20b nut

21 spring

22a, 22b spring seats

23 detection board

23a escape hole

24 switch

25a, 25b support

26a, 26b Low-friction sliding Material (sliding Unit)

26c, 26d roller (sliding unit)

28 axle

151 electric motor

152 pulley

153(153 a-153 e) rope

Detailed Description

An embodiment showing a double-deck elevator system according to the present invention will be described below with reference to the drawings.

As shown in fig. 1, the double-deck elevator apparatus has: an elevator car frame 2 that ascends and descends in the hoistway 1; a main sling 3 having one end connected to the elevator car frame 2; a balance weight 4 connected to the other end of the main sling 3 and lifted in the lifting passage 1; a driving device 6 provided in the machine room 5 at the upper portion of the hoistway 1, for driving the main hoist 3, the middle portion of the main hoist being wound around the driving device 6; a diverting pulley 7 that is provided in the vicinity of the drive device 6 in the machine room 5 and around which the main rope 3 is wound; and a control device 8 provided in the machine room 5 for controlling the operation of the double deck elevator apparatus. The control device 8 is connected to the drive device 6 via a cable 9.

As shown in fig. 2, the elevator car frame 2 is constituted by an upper frame 2a, an intermediate frame 2b, a lower frame 2c, and a longitudinal frame 2d, and is guided by guide rails 11 provided upright in the hoistway 1 by guide members 10 provided at four corners of the elevator car frame 2. Further, the elevator car frame 2 is provided with an upper car 12 and a lower car 13 movable in opposite directions in the up-down direction within the elevator car frame 2, a guide rail 14 guiding the movement of the upper car 12 and the lower car 13, and a drive unit 15 driving the upper car 12 and the lower car 13.

The drive unit 15 includes, for example, a motor 151, a plurality of pulleys 152 provided at lower portions of the upper car 12 and the lower car 13, and a plurality of ropes 153, and the ropes 153 are wound around a sheave 151a and the pulleys 152 of the motor 151, and have one end fixed to the upper frame 2a and the other end fixed to the intermediate frame 2 b.

In the double-deck elevator system, as shown in fig. 3, the ropes 153 are constituted by, for example, 5 ropes 153a, 153b, 153c, 153d, 153e, and the ends of the ropes 153a to 153e include: a plurality of sleeves 16 that receive and fix the ends of the rope 153, a plurality of rod members 18 connected to the sleeves 16 by pins 17, a hanger plate 19 through which the rod members 18 can pass, a plurality of nuts 20a, 20b screwed to the rod members 18, a plurality of springs 21 provided between the nuts 20b and the hanger plate 19, and spring seats 22a, 22b provided on the upper and lower portions of the springs 21. The hanger plates 19 are respectively provided on the upper frame 2a that fixes one end of the rope 153 and the middle frame 2b that fixes the other end of the rope 153. In the ropes 153 shown in fig. 3, the lengths of 5 ropes 153a, 153b, 153c, 153d, 153e are equally long, and the height positions of the respective bar members 18 are also set to be the same.

As shown in fig. 3, in the double-deck elevator apparatus of the present embodiment, a detection plate 23 movable in the vertical direction and a switch 24 for detecting the displacement of the detection plate 23 are provided above the nut 20 a. The detection plate 23 is supported by support columns 25a, 25b provided upright on the hanger plate 19 via sliding units (e.g., low-friction sliding materials 26a, 26 b). Further, the detection plate 23 is formed with escape holes 23a through which the upper portions of the respective bar members 18 can be passed, respectively.

As shown in fig. 1, in the double-deck elevator system having the above-described structure, when the elevator car frame 2 is at the upper floor, the interval between the upper car 12 and the lower car 13 is adjusted to the dimension H1 according to the interval since the interval between the floors where the elevator lobbies are located is H1, and when the elevator car frame 2 is at the lower floor, the interval between the upper car 12 and the lower car 13 is adjusted to the dimension H2 according to the interval since the interval between the floors where the elevator lobbies are located becomes H2. When the above-described adjustment of the distance between the upper car 12 and the lower car 13 is performed, the rope 153 is driven by the motor 151 so that the upper car 12 and the lower car 13 are moved up and down by the sheave 152. In addition, the intervals of floors where the elevator lobbies are located are different depending on the conditions of the building.

For example, a case where any one portion of the cord 153d is cut will be described below. When the load is 0kg, the length of the spring 21 is a free length (L), and when the spring 21 is mounted in a state in which a load acts thereon as shown in fig. 3, the spring 21 undergoes deflection (X) in accordance with the load, and the height dimension thereof changes in accordance with the deflection, so that the height dimension of the spring 21 becomes (L-X). When the rope 153d is cut, the load acting on the spring 21 is eliminated, and the height dimension of the spring changes from (L-X) to (L) as shown in fig. 4. When the spring 21 is expanded, the nut 20a presses the detection plate 23 supported by the low-friction sliding materials 26a, 26b in the direction indicated by the arrow 27, and the detection plate 23 comes into contact with the detection switch 24, whereby the detection switch 24 outputs an abnormality detection signal. As shown in fig. 5, the control device 8 determines in step S70 that an abnormality has occurred in the rope 153 that drives the upper car 12 and the lower car 13 based on the abnormality detection signal, and stops and opens the elevator doors after moving the elevator car frame 2 to the nearest floor in step S71, and notifies passengers in the upper car 12 and the lower car 13 of leaving the elevator cars as soon as possible in step S72 by voice or display. At this time, as shown in step S73, the load detector in the elevator car, not shown, determines whether or not the load in the elevator car is equal to or less than a predetermined value Wo, that is, whether or not there are passengers in the elevator car, and when the load in the elevator car is equal to or more than the predetermined value Wo, the notification is continued by a voice or a display. On the other hand, when the load in the elevator car is equal to or less than the predetermined value Wo, the elevator door is closed and the operation of the elevator is stopped in step S74. After that, the abnormality is notified to the outside in step S75 to perform the repair job.

According to the present embodiment, the detection plate 23 provided on the upper portion of the nut 20a and the switch 24 for detecting the displacement of the detection plate 23 can detect the abnormality of the plurality of ropes 153a to 153e at the same time, and can reliably detect the abnormality even when only one rope has an abnormality. This ensures the safety of the passenger. In particular, since the length of the rope 153 for driving the upper car 12 and the lower car 13 in the double-deck elevator is short, the self weight of the rope 153 is small, and the inertial force of the rope pulled by the spring 21 is small, so that the time from the occurrence of an abnormality in the rope to the detection of the abnormality can be shortened, and measures can be promptly taken against the abnormality. Further, since the detection plate 23 is supported by the low-friction sliding members 26a and 26b serving as the sliding means, when the spring 21 is extended due to an abnormality in the rope 153 and the detection plate 23 is pressed upward by the nut 20a, the detection plate 23 can be smoothly displaced, and thus the abnormality in the rope can be reliably detected.

In particular, in the present embodiment, as shown in fig. 2, since the switches 24 are provided at both ends of the rope 153 that drives the upper car 12 and the lower car 13, when the rope is cut near one end portion, the self weight of the rope 153 is larger than that of the one end portion at the other end portion, so that the inertial force of the rope pulled by the spring 21 is larger than that of the one end portion, the self weight of the rope 153 at the one end portion is reduced by the self weight, and the inertial force of the rope pulled by the spring 21 is also reduced, so that the time from occurrence of an abnormality of the rope to detection of the abnormality can be further shortened, and measures against the abnormality can be taken promptly and reliably.

In the first embodiment, the case where the rope 153 is cut at an arbitrary portion is described, but the abnormality can be detected in the same step by extending the spring 21 in the same manner as the case where the rope 153 is loosened for some reason.

In the present embodiment, whether or not there are passengers in the elevator car is determined based on the load in the elevator car, but for example, it may be determined by another sensor such as an infrared sensor, or it may be determined by integrating the detection results of a plurality of sensors.

For example, when the passenger in the upper car has already finished the elevator, but the passenger in the lower car has not finished the elevator, that is, when the passenger in one of the two elevator cars has already finished the elevator, but the passenger in the other elevator car has not finished the elevator, the elevator car set to have the passenger who has finished getting on first enters step S74 as the passenger finishes getting on, thereby preventing the passenger from getting on the elevator car again, and the safety can be further improved.

In addition, although the present embodiment is configured to determine whether or not there are passengers in the elevator car in step S73, close the elevator doors in step S74 after determining that there are no passengers in the elevator car, stop the operation of the elevator, and notify the abnormality to the outside in step S75, the present embodiment may be configured to perform step S75 and then step S71 and later, or may be configured to perform step S75 and step S71 at the same time, and then step S71 and later, when determining that there is an abnormality in the rope 153 driving the upper car 12 and the lower car 13 in step S70. In this way, when an abnormality occurs in the rope 153 that drives the upper car 12 and the lower car 13, the abnormality can be quickly detected, and therefore, the recovery operation can be quickly performed.

A second embodiment of the double-deck elevator system according to the present invention will be described below with reference to fig. 6. The same portions as those described above are denoted by the same reference numerals.

As shown in fig. 6, in the double-deck elevator apparatus according to the second embodiment, the detection plate 23 is supported by support columns 25a and 25b provided upright on the hanger plate 19 by sliding means (e.g., rollers 26c and 26 d). Further, the lengths of the five ropes 153a, 153b, 153c, 153d, 153e are not the same, and the height positions of the respective bar members 18 are also not the same. Even when the height positions of the rod members 18 are different, the heights of the hanger plates 19 to the nuts 20b are set to be substantially the same, so that the rope tensions of the ropes 153a to 153e are substantially uniform. Since the operation and effect are the same as those described above, the description thereof will be omitted here.

As shown in the second embodiment, the present invention can also be applied to a case where the lengths of the five ropes 153a to 153e are different from each other and the height positions of the respective bar members 18 are also different from each other. Further, since the detection plate 23 is supported by the rollers 26c and 26d which are the sliding means, when the spring 21 is extended due to an abnormality of the rope 153 and the detection plate 23 is pressed upward by the nut 20a, the detection plate 23 can be displaced smoothly, and thus the abnormality of the rope can be detected reliably.

A third embodiment of the double-deck elevator system according to the present invention will be described below with reference to fig. 7. The same portions as those described above are denoted by the same reference numerals.

As shown in fig. 7, in the double-deck elevator apparatus according to the third embodiment, one end of the detection plate 23 is rotatably supported by a shaft 28 provided between the detection plate 23 and the support column 25 d.

According to the third embodiment, for example, when any portion of the rope 153d is cut, the load acting on the spring 21 is eliminated, and the spring 21 is extended. As the spring 21 expands, the detection plate 23 is pushed upward by the nut 20a, and the detection plate 23 rotates about the shaft 28 and contacts the detection switch 24, so that the detection switch 24 outputs an abnormality detection signal. The following operations and effects are the same as those described above, and therefore, the description thereof is omitted here.

In the third embodiment, since the detection plate 23 is rotatably supported by the shaft 28, when the spring 21 is extended due to an abnormality of the rope 153 and the detection plate 23 is pressed upward by the nut 20a, the detection plate 23 can be smoothly displaced, and thus the abnormality of the rope can be reliably detected.

Further, when the detection plate 23 is rotatably supported by the shaft 28, the distances between the rod members 18 and the shaft 28 are different, and therefore, the amount of rotation of the detection plate 23 due to the abnormal rope is different, but this problem can be solved by optimizing the stroke of the switch 24.

Claims (3)

1. A double-deck elevator installation having: an upper car and a lower car movable in opposite directions in an up-down direction within an elevator car frame; a drive unit for driving the upper car and the lower car; pulleys provided on the upper car and the lower car, respectively; a plurality of ropes wound around the sheave and the pulley of the drive unit; a plurality of sleeves that receive and secure the ends of the cords; a plurality of rod members connected with the sleeves; a hanger plate through which the bar members pass; a plurality of nuts screwed with the rod member; and a plurality of springs disposed between the nuts and the hanger plate, the double-deck elevator apparatus being characterized in that,

a detection plate provided movably in the vertical direction and a switch for detecting the displacement of the detection plate are provided on the upper portion of the nut, and when an abnormality occurs in the rope, the spring is extended to press the detection plate upward via the nut, and the switch is operated to detect the abnormality in the rope.

2. The double deck elevator apparatus according to claim 1, wherein the sensing plate is supported by a sliding unit.

3. The double deck elevator apparatus according to claim 1, wherein the detection plate is rotatably supported by a shaft provided at one end thereof.