JP2006111408A - Multi-car elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably operate a circulation type multi-car elevator, and to relax a sudden fluctuation of a load applying to a rope. <P>SOLUTION: This circulation type multi-car elevator is formed by arranging a plurality of cars 3A-3F inside hoist ways 1A-2B. Ropes 4A and 4B are connected to the plurality of cars to form them into a pair. A rope driving means has multiple rope driving pulleys 26 for suspending the rope. The rope driving pulleys are arranged in an upper part and a lower part of the hoist ways. The rope driving pulleys are arranged by distributing them on an arc or a smooth curve. The rope driving pulleys are formed into groups, and a driving motor 23 for driving the rope driving pulleys for rotation is provided per a group. Each of the groups corresponds to a pair of cars. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a multicar elevator, and more particularly to a multicar elevator in which a plurality of cars provided in a hoistway are circulated.

  An example of a conventional multi-car elevator is described in Patent Document 1. In the multi-car elevator described in this publication, two main ropes arranged in parallel to the driving wheel and the deflecting wheel are wound. These main ropes form a loop having an ascending portion, a descending portion, and upper and lower horizontal portions. A connecting beam is connected between the two main ropes. A car is rotatably attached to the connecting beam. A circulation loop is formed by the main rope and the car. There are a plurality of circulation loops, and each circulation loop is provided with a drive source for independently driving the drive wheels.

JP-A-8-26629

  The multi-car elevator described in Patent Document 1 is configured to independently circulate and drive a plurality of cars, and shows one method for realizing a multi-car system. However, the operation method of each loop, the connection between the rope and the car, and the like are not specifically taken into account, and there are some problems when actually realizing the multicar elevator. For example, because the main rope is a wire rope, when the car switches from horizontal movement to vertical movement, the load of the car is suddenly applied to the wire rope, and the rope tension fluctuates, causing vibration and rope movement. There is a risk of slipping.

  The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to stably operate and improve reliability in a multi-car elevator. Another object of the present invention is to reduce vibration and noise in a multi-car elevator.

  A feature of the present invention that achieves the above object is that there are a plurality of car pairs in which the car is connected to both ends of two ropes arranged diagonally, and the rope connecting the car pairs is on a smooth curve or It is driven by a large number of rope drive pulleys arranged on a line in which smooth curves and straight lines are mixed.

  And in this feature, a large number of rope drive pulleys are arranged separately for each pair of cars, and they should be arranged in different positions in the traveling direction of the cars, and the rope drive that drives two ropes The rope drive means is mounted on the drive motor, the belt drive shaft for transmitting the power of the drive motor to the rope arranged diagonally, the belt drive shaft for transmitting to the rope drive system, and the belt drive shaft and the drive motor. A first drive belt, and the rope drive system is fixedly mounted coaxially with the plurality of rope drive pulleys and rotated synchronously, a tension roller positioned between the drive pulleys, It is preferable to have a driving pulley and a second driving belt mounted on the tension roller.

  Another feature of the present invention that achieves the above object includes a rope in which a plurality of cars are arranged in a hoistway, the plurality of cars are connected in pairs, and driving means for driving the ropes. The means has a large number of rope drive pulleys on which the rope is mounted, and the large number of rope drive pulleys are arranged above and below the hoistway to drive the multiple rope drive pulleys to run the car. A plurality of rope drive pulleys are distributed on an arc or on a smooth curve, a plurality of rope drive pulleys are grouped, and a drive motor that rotationally drives a number of rope drive pulleys for each group is provided. The group is in correspondence with the car pair.

  And in this feature, a fourth drive pulley is attached to the other end side of the shaft to which the rope drive pulley is attached to one end side, and this shaft has almost the same length for each group. A second drive belt is mounted every time, and the motor preferably drives the second drive belt via the first drive belt and rotates a number of rope drive pulleys of the same group at the same rotation speed. . Further, a rope fastening portion is arranged at a diagonal position above the car, and the rope driving pulley and the fourth driving pulley are positioned above the hoistway and at a position corresponding to the diagonal position of the car at the position where the car goes straight. It is desirable to form a loop of two ropes by arranging a pair of cages and connecting the pair of cages to the rope at the rope fastening portion.

  In the above feature, the drive means has two rope drive systems corresponding to the two systems of ropes, and a belt drive shaft having a differential gear device is disposed between the rope drive systems. A second drive pulley is attached to the intermediate portion, a third drive pulley is attached to both ends, and the first drive pulley and the second drive pulley attached to the motor are connected via the first drive belt. The third drive pulleys disposed at both shaft ends are connected to the fourth drive pulley via the second drive belt, respectively, and the second drive belt, the third drive pulley, The drive pulley constitutes a rope drive system, and the drive means preferably drives the two rope drive systems in synchronization.

  More preferably, the rope fastening part is formed so as to be able to turn, and a counterweight and a rotation damping device are provided on the turning shaft of the rope fastening part, or the rope tension can be adjusted at the rope fastening part and the expansion and contraction of the rope length can be absorbed. Install a spring, or provide other driving means at the rope fastening part to enable the car to move independently in the vertical direction, or move the drive motor above the rope drive pulley and the fourth drive pulley or in the axial direction of the belt drive shaft The first tension roller that applies tension to the second belt is disposed between the fourth drive pulleys, or the second belt is mounted above the first tension roller. A second tension roller is disposed, and a break sensor for detecting breakage of the second belt is provided on the second tension roller or the third drive pulley, Grant braking force in the vicinity of the drive pulley to the fourth driven pulley is better to either provide a brake system having an electromagnetic solenoid. Furthermore, a detection device for detecting the breakage of the second belt is provided in the vicinity of the second belt, a brake device is attached to the output shaft of the differential gear device, and the detection device detects the breakage of the second belt. You may make it operate this brake device.

  According to the present invention, a pair of passenger cars are connected to each other by a rope to form a circulation loop, and the loop is driven independently and the loop shape is formed into an egg shape, so that the multicar elevator can be stably operated. . Moreover, since the rapid fluctuation of the rope load is alleviated, vibration and noise can be reduced.

  Hereinafter, an embodiment of a multicar elevator according to the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram of a multicar elevator and is a front view. A circulation path is formed from the hoistways 1A and 1B arranged side by side and the reversal moving sections 2A and 2B positioned above and below these hoistways 1A and 1B. In the circuit, the six cars 3 move clockwise. The cars 3A and 3B are symmetrically arranged at a position approximately half the length of the circulation path, and the cars 3A and 3B are connected by ropes 4A and 4B. The pair of cars 3A and 3B and the pair of ropes 4A and 4B form one group. Similarly, the pair of cars 3C and 3D and the pair of cars 3E and 3F are also fastened with other ropes (not shown) to form other groups. In the present embodiment, six cars 3 constitute three groups.

  Rope fasteners 5 are attached to the left front and right rear of the upper surfaces of the cars 3A to 3F. Two systems of rope 4A fastened on the left front of the cars 3A to 3F and rope 4B fastened on the right rear of the cars 3A to 3F are used. The ropes 4A and 4B of each system are wound around a first pulley (not shown in FIG. 1) arranged in a plurality of upper and lower rope fastening guide rails 13A to 13D, which will be described in detail later. Form.

  Hereinafter, in order to simplify the description, only the configuration of the loop formed by the cars 3A and 3B will be described. The loop formed by the cars 3C and 3D and the loop formed by the cars 3E and 3F have the same configuration. A drive motor 23a is provided at the upper part of the upper reversal movement section 2A and fixed to the building. A pinion is attached to the shaft end of the drive motor 23a, and the pinion meshes with the differential gear 6a.

  Different output shafts are connected to the differential gear 6a in the front-rear direction, the front output shaft drives the front rope 4A, and the rear output shaft drives the rear rope 4B. For this reason, belt driving pulleys are respectively attached to the output shafts before and after the differential gear 6a. A driving belt 24 is mounted on the belt driving pulley. The drive belt 24 is also mounted on a second pulley that is coaxially attached to the plurality of first pulleys disposed in the upper rope fastener guide rails 13A and 13B. Therefore, when the second pulley rotates, the first pulley also rotates, and the car 3 is circulated and moved by the frictional force of the ropes 4A and 4B mounted on the first pulley.

  FIG. 2 is a front view showing a state in which the car 3A is arranged on the hoistway 1A that moves upward. The other cars 3B to 3F and the hoistway 1B have the same configuration and operation. On both the left and right sides of the hoistway 1A, guide rails 9A and 9B formed in a straight line extending vertically are arranged. The guide rail 9B is also a guide rail for the adjacent hoistway 1B. Guide rollers 8 are attached to the upper surface of the car 3A on the left and right ends and the lower surface of the car 3A on the left and right ends so as to be rotatable along the guide rails 9A and 9B. Therefore, the car 3A can ascend the hoistway 1A along the guide rails 9A and 9B by using the guide rollers 8 attached vertically and horizontally.

  On the upper surface of the car 3A, a rope fastener 5 for attaching the ropes 4A and 4B for suspending and driving the car 3A to the car 3A is installed. On the car 3A, a rope fastener support member 14 is attached so as to extend upward. The rope fastener support member 14 is provided with a rotating shaft 15 extending in the horizontal direction. The rotating shaft 15 is rotatably engaged with the rope fastener 5. When the rotary shaft 15 and the rope fastener 5 are arranged in this way, even if the rotary shaft 15 is arranged on the axes of the ropes 4A and 4B, the rope fastener 5 tends to tilt due to its own weight. Therefore, the frame shape or the like of the rope fastener 5 is adjusted so that the center of gravity of the rope fastener 5 coincides with the axes of the ropes 4A and 4B.

  Therefore, in this embodiment, the rope fastener counterweight 7 is attached to the rotary shaft 15 of the rope fastener 5. Further, a rotation damping device (not shown) is attached to the rotation shaft 15 in order to suppress vibration generated by the swinging of the rope fastener 5. In the present embodiment, the rope fastener 5 is prevented from being tilted by the counterweight 7, but a linear guide rail extending vertically to support the rope fastener 5 is provided on the hoistways 1A and 1B. The rope fastener 5 may be provided with a rope fastener guide roller 12, and the guide roller 12 may be pressed against the guide rail. Moreover, you may attach the brake which restrains rotation of the rotating shaft 15 instead of the rope fastener counterweight 7 and a rotation damping device.

  FIG. 3 shows details of the reversal movement section 2A in which the car 3A reversely moves from the left hoistway 1A to the right hoistway 1B. The lower reverse movement section 2B has the same configuration, and the operation of the car 3A in the lower reverse movement section 2B is the same. One guard rail 9A among the guide rails 9A, 9B provided in the hoistways 1A, 1B is provided to a position slightly protruding from the hoistway 1A toward the reverse movement section 2A. On the other hand, the guide rail 9B is installed only in the hoistways 1A and 1B up to a position about the height of the car 3A. This is because the car 3A can cross the hoistways 1A, 1B in the reversal movement sections 2A, 2B.

  In the reverse movement sections 2A and 2B, there are no guide rails 9A and 9B that support the left and right sides of the car 3A. It is provided in the hoistways 1A and 1B. The reversing guide rails 11A and 11B have an arc shape and are arranged behind the front surface and the rear surface of the car 3A so as not to interfere with the car 3A when the car 3A moves laterally. Yes.

  Above the guide rail 9B, the guide rails 11A and 11B are discontinuous. This is to avoid interference between the rope fastener 5 and the guide rails 11A and 11B. Notches 11x and 11y were formed at portions where the travel locus of the rope fastener 5 and the guide rails 11A and 11B intersect. Then, before one guide roller 10 passes through the reversing guide rail 11A and reaches the notch 11x, the other guide roller 10 comes into contact with the reversing guide rail 11B to support the car 3A, 11B was placed. In the lower reversal movement section 2B, the guide roller 10 can proceed smoothly without interference between the rope fastener 5 and the guide rail 11, so that a notch is not formed.

  The rope fastener 5 provided on the upper surface of the car 3A can swing around a rotation shaft 15. Two rope fastener guide rollers 12 sandwich one of the rotation shafts 15 on one side of the rope fastener 5. One rope fastener guide roller 12 is attached to the other surface of the surface, which is substantially at the position of the rotary shaft 15. Rope fastener guide rails 13A and 13B for guiding the rope fastener guide roller 12 are provided in the reverse movement section 2A. The end points of the rope fastener guide rails 13A, 13B slightly extend to the lifting sections 1A, 1B. The rope fastener guide rails 13A and 13B have a similar shape to the reversing guide rails 11A and 11B, and are arranged at different positions in the front-rear direction. And the adjacent sides of the hoistways 1A and 1B overlap each other in the left-right direction because there is no interference.

  Rope fastener guide rails 13C and 13D are similarly provided in the lower reversal moving section 2B. The rope fastener guide rails 13 </ b> C and 13 </ b> D have a shape similar to the reversing guide rail 11 disposed on the lower side, and overlap each other on the inner side in the left-right direction. The rope fastener guide rails 13C and 13D are also installed with their positions changed in the front-rear direction. Thereby, the cage | basket | car 3A can be run along the rope fastener guide rails 13A-13D which have a curved part. Therefore, the cage 3A makes the rope fastener guide roller 12 contact the rope fastener guide rails 13A to 13D provided on the upper side, and the reverse guide roller 10 contact the reverse guide rails 11, 11A, 11B provided on the lower side. The swaying of the car 3A can be suppressed.

  Details of the attachment position of the rope fastener 5, the positions of the rope fastener guide rails 13A to 13D, and the positions of the reversing guide rails 11, 11A, 11B will be described with reference to FIG. FIG. 4 is a cross-sectional view when a multi-car elevator is arranged on the elevator shaft. The lower side of the figure is the front door side, and the upper side of the figure is the back side. Taking the car 3A as an example, the rope fastener 5 is disposed so as to protrude rearward of the rear left corner of the car 3A and forward of the front right corner of the car 3A. The ropes 4Ba and 4Aa extending from the two rope fasteners 5 suspend the car 3A. Therefore, if the center of gravity of the car 3A and the midpoint of the line connecting the two rope fasteners 5 are matched, the load is not applied to the ropes 4Ba and 4Aa, and the car 3A can be moved up and down stably. Therefore, the rope pair 4Aa, 4Ba, the rope pair 4Ab, 4Bb, the rope pair 4Ac, 4Bc for suspending the cage 3E, 3F, respectively. With respect to the cars 3A to 3F, the inner side is the inner side (4Aa, 4Ba), the inner side is the inner side (4Ab, 4Bb), and the outer side is the outer side (4Ac, 4Bc).

  As described above, the reversing guide rails 11, 11A, and 11B are arranged in the front-rear direction of the cars 3A to 3F that are out of the passing areas of the cars 3A to 3F so that the cars 3A to 3F can pass through the reversing movement sections 2A and 2B. Provided. Corresponding to the reversing guide rails 11, 11A, 11B, the reversing guide rollers 10 are provided at the lower side of the cars 3A to 3F and at the front, rear, left and right four places. A rope fastener guide rail 13 is provided further outward in the front-rear direction of the reversing guide rail 11.

  The detail of the rope fastener 5 is demonstrated using the front view shown in FIG. The rope fastener 5 attached to the right front side on the upper surface of the car 3A will be described as an example. A rotating shaft 15 is attached to the central portion in the length direction of the elongated rope fastener frame 16 having a wide portion 16b formed at the center. A pair of upper and lower rope fastening pulley shafts 21 extends in the horizontal direction near the end portion in the lengthwise direction of the wide portion 16b, and a rope fastening pulley 17 is attached to each rope fastening pulley shaft 21. The upper rope 4Aau is wound around the rope fastening pulley 17 and then connected to one end of the spring rod 18 at the terminal 18b.

  A screw is formed at the other end of the spring rod 18, and the nut 20 is engaged therewith. A spring 19 is attached to the spring rod 18, and one end of the spring 19 is held by a nut 20. The other end of the spring 19 is held by a spring stopper 22 attached to the rope fastener frame 16. At this time, the spring rod 18 slides in a hole formed in the spring stopper 22. When the nut 20 is tightened, a restoring force is generated in the spring 19 and a sufficient tension is applied to the ropes 4Aau and 4Aad.

  The lower rope 4Aad has the same configuration. Therefore, according to the present embodiment, a loop is formed by the rope 4Aau in the traveling direction of the car 3A and the rope 4Aad in the backward direction, and the ropes 4Aau and 4Aad are individually fastened by the rope fastener 5. Thereby, compared with the case where one endless rope is used, adjustment and rope replacement when the rope is extended are facilitated.

  In this embodiment, if the rope fastener frame 16 and the rope fastening pulley shaft 21 can be slid in the vertical direction of the car 3A and the rope fastening pulley 17 is moved up and down by a linear actuator not shown, the ropes 4Aa and 4Ab The connected cars 3A and 3B can be minutely moved independently of each other. Since the cars 3A to 3D can be moved minutely, it is easy to adjust the floor when stopping at the elevator platform. The rope fastener support member 14 may be provided with a vertical extension mechanism to adjust the floor. Further, in this embodiment, tension is applied to the ropes 4Aa and 4Ab using the spring 19, but if a rotary actuator is attached to the rope fastener pulley shaft 21, the tension of the ropes 4Aa and 4Ab can be adjusted actively.

  FIG. 6 is a perspective view showing details of the drive system 41 of the rope 4Aa for driving the cars 3A and 3B. This FIG. 6 is the figure which looked at the upper direction of the cage | basket | car 3A from the front, when the cage | basket | car 3A exists in the hoistway 1A. The drive system 41 of the front rope 4Aa is shown. The drive system 41 is located above the rear left side of the car 3A. A partially arcuate rope fastener guide rail 13A is fixed to the reversal moving section 2A formed above the hoistway 1A. Two rope fastener guide rails 13A having the same shape are arranged facing each other, and a rope drive pulley 26 and an idler pulley 38 for mounting the rope 4Aa are arranged between the rope fastener guide rails 13A.

  The pulleys 26 and 38 are disposed along the rope fastener guide rail 13A. There are seven rope drive pulleys 26 in this embodiment, and one idler pulley 38 is provided at each end of the rope drive pulley 26 row. Each rope drive pulley 26 is fixedly attached to the distal end side of a pulley connecting shaft 27 that passes through one (front side in FIG. 6) rope fastener guide rail 13A, and the distal end of this shaft 27 is the other (FIG. 6). In this case, it is rotatably held by the rope fastener guide rail 13A on the rear side. A fourth belt drive pulley 25D, which will be described in detail later, is fixedly attached to the opposite end of the pulley connection shaft 27. Therefore, the fourth belt drive pulley 25D and the rope drive pulley 26 rotate together.

  A drive system 42 for driving the rope 4Ba is provided in the same configuration on the opposite side of the drive system (the back side of the car 3A) across the car 3A. These two rope drive systems 41 and 42 are driven by the same drive motor 23 in order to synchronize the two ropes 4Aa and 4Ba. In FIG. 6, the details of the drive system 42 for driving the rope 4Ba on the rear side of the car 3A are omitted. In order to drive the two rope drive systems 41 and 42 by the same drive motor 23, a second drive belt 24B mounted on a third belt drive pulley 25C fixedly provided at the tip of the belt drive shaft 29 is provided. Is driven by a third belt driving pulley. A second belt drive pulley 25B is fixedly attached to an intermediate portion of the belt drive shaft 29. The second belt drive pulley 25B and the first drive pulley attached to the tip of the drive motor 23 are connected to each other. The first belt drive belt 24A is mounted.

  In the present embodiment, the power of the drive motor 23 is transmitted to the belt drive shaft 29 using the first drive belt 24A. However, if the drive motor 23 can be disposed near the belt drive shaft 29, a gear is used. A transmission mechanism can be used. In FIG. 6, the differential gear 6 is not shown.

  The belt drive shaft 29 is disposed obliquely above or above the rope fastener guide rail 13A. The second drive belt 24B mounted on the third belt drive pulley 25C provided at the tip of the belt drive shaft 29 is a first drive belt provided at the tip of the pulley connection shaft 27 disposed through the rope fastener guide rail 13A. 4 belt drive pulley 25D. Further, a tension roller 28 is disposed between the fourth belt driving pulleys 25D and 25D in order to apply tension to the second driving belt 24B and to apply sufficient friction to the driving pulley 25D of the fourth belt. The second drive belt 24B is also mounted on the tension roller 28. At both ends of the drive pulley group formed by the fourth belt drive pulley 25D and the tension roller 28, the fourth belt drive pulley 25D is disposed, and above this end, the fourth belt drive pulley 25D is located. In order to apply an appropriate tension to the second drive belt 24B, three second tension rollers 28A to 28C are arranged.

  In the rope drive system 41 configured as described above, the rope 4Aa is wound around a plurality of rope drive pulleys 26 and idler pulleys 38 arranged in an arc shape or a smooth curved shape. One rope drive pulley 26 is directly connected to one fourth belt drive pulley 25 </ b> D via a pulley connecting shaft 27. The pulley connection shaft 27 is pivotally supported by the rope fastener guide rail 13A. The plurality of rope drive pulleys 26 are synchronously rotated by the second drive belt 24B wound around the fourth belt drive pulley 25D.

  According to the present embodiment, a plurality of rope drive pulleys 26 are simultaneously rotated using a single drive motor 23, and the cars 3A and 3B are synchronized by the traction force between the ropes 4Aa and 4Ba and the rope drive pulley 26. Can be driven. Further, since the plurality of rope drive pulleys 26 are arranged in an arc shape or a smooth curved shape including a straight line, the same driving force as when one large-diameter pulley is used is generated, so that the car 3A reversely moves. In this case, it is possible to prevent the tension of the ropes 4Aa and 4Ba from fluctuating rapidly. Further, according to the present embodiment, when the car 3A passes through the reverse movement sections 2A and 2B, the rope fastener guide roller 12 travels on the rope fastener guide rail 13. Therefore, the rope fastener 5 can be prevented from colliding with the rope drive pulley 26.

  Note that if the diameters of the third belt drive pulley 25C attached to the front and rear of the belt drive shaft 29 are different, the rotational speeds of the front and rear rope drive pulleys 26 are different. In that case, one of the two ropes 4 </ b> Aa and 4 </ b> Ba drives the car 3 while generating a slip between the rope drive pulley 26. As a result, wear of the rope 4 is accelerated. In this embodiment, a differential gear 6 (not shown) is interposed between the belt drive shaft 29 that connects the front and rear third belt drive pulleys 25C. Thereby, the difference in rotational speed resulting from the difference in diameter between the two third drive pulleys 25C can be absorbed.

  In the above embodiment, the drive system of the pair of cars 3A and 3B has been described. However, the details of the drive system when the three pairs of cars 3A to 3F are provided in the same hoistway as shown in FIG. 7 shows. FIG. 7 is a front view of a drive system that drives three pairs of car groups. The drive system is located on the upper right front side of the cars 3A to 3F when the cars 3A to 3F are in the hoistway 1A.

  The first car group with the subscript a, the second car group with the subscript b, and the third car group with the subscript c are driven by different drive motors 23a to 23c, respectively. Is done. Hereinafter, in order to simplify the explanation, only a part of the first car group will be explained.

  A drive belt 24Aa is mounted on the first drive pulley 25Aa attached to the shaft end of the drive motor 23a. The drive belt 24Aa travels independently of the other drive belts 24Ab and 24Ac. For each car group, fourth belt driving pulleys 25Da to 5Dc for driving the driving belts 24Aa to 24Ac are formed. A rope drive pulley 26 is connected to each fourth belt drive pulley 25Da. The fourth belt drive pulleys 25Da, 25Db, and 25Dc are arranged so as to be shifted from each other in the traveling direction of the rope 4Aa.

  In other words, the fourth car driving pulley 25Da that drives the first car group and the fourth belt driving pulley 25Dc that drives the third car group are the fourth driving the second car group. A belt driving pulley 25Db is disposed. A fourth belt for driving the third car group is disposed between the fourth belt driving pulley 25Db for driving the second car group and the fourth belt driving pulley 25Da for driving the first car group. A driving pulley 25Dc is disposed. The central tension rollers 28Ba to 28Bc arranged so that appropriate belt tension is applied to the second drive belts 24Ba to 24Bc between the fourth drive pulley and the fourth drive pulley are also shifted from side to side.

  The details of the rope drive pulley are shown in a perspective view in FIG. The ropes 4Aa to 4Ac for driving each car group are arranged with their positions shifted in the front-rear direction in order to narrow the distance between the rope drive pulleys 26a to 26c. Since the ropes 4Aa to 4Ac are arranged so as to be displaced forward and backward, the rope drive pulleys 26a to 26c for mounting the ropes 4Aa to 4Ac are also arranged so as to be displaced in the longitudinal direction. Further, the fourth belt drive pulleys 25Da to 25Dc are arranged to be shifted in the front-rear direction similarly to the rope drive pulleys 26a to 26c so that the second drive belts 24Ba to 24Bc do not interfere with each other.

  Since the rope drive pulleys 26a to 26c for driving the other car groups are shifted in the front / rear and left / right directions, the drive pulleys 26a to 26c do not interfere with the adjacent objects even if the number of cars increases. As a result, the dimension in the thickness direction of the drive pulleys 26a to 26c can be shortened, and the drive device is saved in space. That is, by using a plurality of small-diameter pulleys as driving means, the elevator can be downsized. In addition, since each car group is driven by a different drive motor, the car can be moved independently and the transportation capacity can be improved.

  Safety devices are attached to the rope drive systems 41 and 42. Details of this safety device are shown in front view in FIG. This safety device is a device that makes an emergency stop when the second drive belt 24B is cut due to some trouble. When the second drive belt 24B is cut, the rope drive pulley 26 connected to the fourth drive pulley 25D and the pulley connection shaft 27 is all free to rotate. Therefore, even if the cars 3A to 3F are running or stopped, the weights of the cars 3A and 3B, for example, become unbalanced due to the passenger weight, and the cars 3A and 3B fall on one side and rise on the other side. .

  If the abnormal traveling of the cars 3A and 3B continues, there is a risk of colliding with the other cars 3C to 3F. In order to prevent this collision, the central second tension roller 28E is provided with detection means for detecting that the second drive belt 24B has been cut. That is, a detection spring 30 that is a push spring is attached to the tension roller 28E, and a detection switch 31 is installed on the operating shaft of the detection spring 30.

  On the other hand, on the inner side of the arc portion of the rope fastener guide rail 13A, an arc-shaped brake pad 33 in which a recess corresponding to the outer shape of the fourth belt drive pulley 25D and the outer shape of the tension roller 28 is formed. 4 belt drive pulley 25D and tension roller 28 are arranged in the vicinity. A movable iron core 35 is attached to an intermediate portion of the brake pad 33. A solenoid coil 34 is disposed around the movable iron core 35.

  The solenoid coil 34 is accommodated in the case 36 together with the movable iron core 35. Support springs 37 that press the brake pad 33 against the fourth belt drive pulley 25D and the tension roller 28 are disposed at both ends of the brake pad 33 and inside the arc shape. The brake pad 33, the support spring, the movable iron core 35, and the solenoid coil 34 constitute a brake device 32. The brake device 32 is electrically connected to the detection switch 31.

  The safety device of the present embodiment configured as described above operates as follows. When the drive belt 24B is cut, the tension roller 28E is pushed toward the detection switch 31 by the restoring force of the detection spring 30, and finally comes into contact with the detection switch 31. When the detection switch 31 is pushed by the second tension roller 28E, an input signal is generated in the detection switch 31 and an abnormal signal is transmitted to the brake device 32.

  Since the solenoid coil 34 is always energized, in a normal state, the movable iron core 35 is attracted downward in the figure to form a gap between the belt drive pulley 25D and the brake pad 33. When an abnormal signal is transmitted to the brake device 32, the brake device 32 stops energizing the solenoid coil 34. As a result, the restoring force of the support spring 37 acts, and the brake pad 33 is pressed against the belt drive pulley 25D. The belt driving pulley 25 </ b> D is stopped from rotating by the brake pad 33. Since the rotation of the belt drive pulley 25D is stopped, the rotation of the rope drive pulley 26 directly connected by the pulley connecting shaft 27 is also stopped.

  According to this embodiment, the car can be forcibly stopped by the frictional force between the rope drive pulley and the rope. If the elevator system is equipped with the safety device shown in this example, even if a trouble such as a power failure occurs, the car can be forcibly stopped, and operation can be resumed promptly upon re-energization after a power failure. it can. In this embodiment, the brake pad 33 is pressed against the belt drive pulley 25D, but the brake pad 33 may be pressed against the rope drive pulley 26 and the pulley connecting shaft 27.

  In this embodiment, one car group is stopped. However, the shape of the brake pad 33 may be changed so that all the car groups can be stopped by one brake pad 33. In this case, if one car group is abnormally stopped, the other car groups are also forcibly stopped, so that collision between cars can be reliably prevented.

  In the embodiment of the multi-car elevator, the car is driven by using two front and rear ropes. However, when the belt of the drive device on one side is cut, the brake device attached to the drive motor 23 may be operated. In this case, since the rotation of the rope drive pulley of the other drive device in which the belt is not cut can be restricted, the car can be stopped. In addition, a brake device that restricts the rotation of the belt drive shaft 29 that connects the two rope drive systems 41 and 42 is installed in the vicinity of the belt drive shaft 29, and the rotation of the belt drive shaft 29 is stopped to Rotation may be constrained.

  In the above embodiment, six cars 3A to 3F are arranged in the same hoistway 1A, 1B to form three groups, but four cars are arranged in the same hoistway to form two groups. May be formed, and eight cars may be arranged in the same hoistway to form four groups. In the above embodiment, the two ropes before and after the car are driven simultaneously by one drive motor, but the ropes may be driven one by one using two drive motors. In this case, it is necessary to operate the two drive motors in synchronization.

  Moreover, in the said Example, the drive motor 23 was arrange | positioned in the center part above the hoistways 1A and 1B. However, for example, when the hoistway height is limited due to the layout of the building, or when one group of cars is driven by two drive motors, one of the pulley connection shafts and the drive motor shaft May also be used. Further, in the above embodiment, the detection means for detecting the breakage of the second drive belt is provided in the second tension roller, but it may be provided in the third belt drive pulley 25C. In addition, the drive pulley is arranged in an arc shape, but a curve with little locality variation may be formed by combining an arc, a straight line, an elliptic curve, etc. In that case, the load fluctuation of the rope is in the hoistway and the reverse movement section. The ride performance will be reduced.

  In the above embodiment, the hoistway 1A and the hoistway 1B are separately formed. However, the hoistway 9B is arranged in the middle part of one hoistway so that the hoistway is divided and used. Also good. That is, it is needless to say that a structure in which two cars can be juxtaposed in one elevator shaft may be employed.

1 is a front view of a multicar elevator according to the present invention. The enlarged view of the linear movement area of the multi-car elevator shown in FIG. The enlarged view of the inversion movement area of the multi-car elevator shown in FIG. The cross-sectional view of the multi-car elevator shown in FIG. The detailed front view of the rope fastener used for the multi-car elevator shown in FIG. The perspective view explaining the drive device used for the multi-car elevator shown in FIG. The front view explaining the drive device used for the multi-car elevator shown in FIG. The perspective view explaining the drive device used for the multi-car elevator shown in FIG. The front view of the emergency stop system used for the multi-car elevator shown in FIG.

Explanation of symbols

1A, 1B ... hoistway, 2A, 2B ... reverse movement section, 3A-3F ... (ride) car, 4A, 4B ... rope, 5 ... rope fastener, 6 ... differential gear, 7 ... rope fastener counterweight, DESCRIPTION OF SYMBOLS 8 ... Guide roller, 9 ... Guide rail, 10 ... Reversing guide roller, 11, 11A, 11B ... Reversing guide rail, 12 ... Rope fastener guide roller, 13A-13D ... Rope fastener guide rail, 14 ... Rope fastening Tool support material, 15 ... Rotating shaft, 16 ... Rope fastener frame, 17 ... Rope fastening pulley, 18 ... Spring rod, 19 ... Spring, 20 ... Nut, 21 ... Rope fastening pulley shaft, 22 ... Spring stopper, 23 ... Drive Motor, 24A, 24B ... drive belt, 25A-25D ... belt drive pulley, 26 ... rope drive pulley, 27 ... pulley connection shaft 28, 28A to 28E ... tension roller, 29 ... belt drive shaft, 30 ... detection spring, 31 ... detection switch, 32 ... brake device, 33 ... brake pad, 34 ... solenoid coil, 35 ... movable iron core, 36 ... Case, 37: Support spring, 38 ... Idler pulley, 41, 42 ... Rope drive system.

Claims (13)

  There are a plurality of car pairs in which the car is connected to both ends of the two ropes arranged diagonally, and the rope connecting the car pairs is on a smooth curve or a line with a smooth curve and a straight line A circulating multi-car elevator that is driven by a number of arranged rope drive pulleys.   2. The circulating multi-car elevator according to claim 1, wherein the plurality of rope drive pulleys are arranged separately for each pair of cars and are arranged at different positions in the traveling direction of the cars. .   Rope drive means for driving the two ropes, the rope drive means is a drive motor, and a belt drive shaft for transmitting to a rope drive system for transmitting the power of the drive motor to a diagonally arranged rope; A first drive belt mounted on a belt drive shaft and a drive motor, and the rope drive system is fixedly mounted coaxially with the plurality of rope drive pulleys, and a drive pulley that rotates synchronously; The circulation type multi-car elevator according to claim 1, further comprising a tension roller positioned between the drive pulleys, and a second drive belt mounted on the drive pulley and the tension roller.   A plurality of cars are arranged in the hoistway, and a rope for connecting the plurality of cars in pairs and a driving means for driving the rope are provided, and the driving means drives a plurality of ropes for mounting the rope. A plurality of rope drive pulleys are disposed above and below the hoistway, and the plurality of rope drive pulleys are driven to drive the car, and the multiple rope drive pulleys are arranged on an arc. Alternatively, the plurality of rope drive pulleys are arranged in a distributed manner on a smooth curve, and a drive motor for rotating the multiple rope drive pulleys is provided for each group, and each group corresponds to the car pair. A multi-car elevator characterized by   A fourth drive pulley is attached to the other end side of the shaft to which the rope drive pulley is attached to one end side, and this shaft has substantially the same length for each group. Two drive belts are mounted, and the motor drives the second drive belt via the first drive belt, and rotates a number of rope drive pulleys of the same group at the same rotation speed. The multi-car elevator according to claim 4.   A rope fastening portion is arranged at a diagonal position on the upper part of the car, and the rope driving pulley and the fourth driving pulley are placed above the hoistway and at a position corresponding to the diagonal position of the car at the position where the car goes straight. The multi-car elevator according to claim 5, wherein the multi-car elevator is arranged and connected to the rope at a rope fastening portion to form a pair of rope loops.   The drive means has two rope drive systems corresponding to the two systems of ropes, a belt drive shaft having a differential gear device is disposed between the rope drive systems, and an intermediate portion of the belt drive shaft The second drive pulley is attached to both ends, the third drive pulley is attached to both ends, and the first drive pulley attached to the motor and the second drive pulley are connected via the first drive belt. The third drive pulleys disposed at both shaft ends are connected to the fourth drive pulley via the second drive belt, respectively, and the second drive belt, the third drive pulley, The multi-car elevator according to claim 6, wherein the drive pulley of 4 constitutes a rope drive system, and the drive means drives the two rope drive systems in synchronization.   The multi-car elevator according to claim 7, wherein the rope fastening portion is formed to be turnable, and a counterweight and a rotation damping device are provided on a turning shaft of the rope fastening portion.   The multi-car elevator according to claim 6, wherein a spring capable of adjusting rope tension and absorbing expansion and contraction of the rope length is attached to the rope fastening portion.   The multi-car elevator according to claim 6, wherein the rope fastening portion is provided with other driving means that allows the car to move independently in the vertical direction.   The multi-car elevator according to claim 7, wherein the drive motor is installed above the rope drive pulley and the fourth drive pulley or at a position separated in the axial direction of the belt drive shaft.   A first tension roller that applies tension to the second belt is disposed between the fourth drive pulleys, and a second tension roller on which the second belt is mounted is disposed above the first tension roller. And a break sensor for detecting breakage of the second belt is provided in the second tension roller or the third drive pulley, and a braking force is applied to the fourth drive pulley in the vicinity of the fourth drive pulley. The multi-car elevator according to claim 7, further comprising a brake device provided with an electromagnetic solenoid. When a detection device for detecting breakage of the second belt is provided in the vicinity of the second belt, a brake device is attached to the output shaft of the differential gear device, and the detection device detects breakage of the second belt The multi-car elevator according to claim 7, wherein the brake device is operated.

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