CN1760105A - Multicar elevator - Google Patents

Abstract

With a circulation type multicar elevator, a plurality of cages is arranged in ascent and descent paths. Ropes connect the plurality of cages in pairs. A drive device for the ropes comprises a plurality of rope drive pulleys, on which the ropes are stretched. The rope drive pulleys are dispersedly arranged on an arc or a smooth curve above and below the ascent and descent paths. The rope drive pulleys are grouped and drive motors are provided every group to rotatingly drive the rope drive pulleys. The respective groups correspond to pairs of cages.

Description

multi-car elevator

technical field

The invention relates to a multi-car elevator, in particular to a multi-car elevator in which a plurality of cars move in circulation in a lifting passage.

Background technique

An example of a conventional multi-car elevator is described in JP-A-8-26629. In the multi-car elevator described in this gazette, two main ropes arranged in parallel are wound around a driving wheel and a driven wheel. Furthermore, these main cables form an annulus having an ascending portion, a descending portion and upper and lower horizontal portions. A connecting beam is connected across the two main cables. A passenger car is rotatably mounted on the connecting beam. A circular ring is formed by the main cable and the car. There are multiple sets of circulating ring bodies, and driving sources for independently driving the driving wheels are provided on each circulating ring body.

In the multi-car elevator described in Japanese Unexamined Patent Publication No. 8-26629, there is shown a method of realizing a multi-car system by configuring a plurality of cars to cycle independently. However, no specific consideration has been given to the operation method of each ring body, the connection of the cables to the passenger cars, etc., and there are several problems in the actual realization of a multi-car elevator. For example, when the main cable is a steel cable, when the car is switched from horizontal movement to vertical movement, the load of the car is quickly added to the steel cable, and the tension of the cable may change to cause vibration or cable slippage .

Contents of the invention

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

The feature of the present invention to achieve the above object is to have a plurality of pairs of passenger cars connected to the two ends of the two cables arranged on the diagonal, and to arrange them on gentle curves or Multiple cable drive pulleys on a line that mixes gentle curves and straight lines drive the cables connecting the pairs of passenger cars.

In addition, in this feature, it is preferable that a plurality of cable drive pulleys are independently arranged on each of the passenger cars, and are arranged so as to change positions from each other along the moving direction of the passenger car, and there is a cable drive pulley for driving the two cables. mechanism, the cable drive mechanism has a drive motor, a belt drive shaft that transmits the power of the drive motor to the cable drive system, and a first drive belt mounted on the belt drive shaft and the drive motor, wherein the cable drive system is arranged opposite The cables on the corners transmit power, and the cable drive system has drive pulleys that are coaxially fixedly installed and rotate synchronously with the plurality of cable drive pulleys, tension rollers located between the drive pulleys, and bridged between the drive pulleys and tension rollers. on the 2nd drive belt.

Another feature of the present invention to achieve the above object is that a plurality of cars are arranged in the hoisting passage, a cable connecting the plurality of cars in pairs, a drive mechanism for driving the cable, and the drive mechanism has a structure for erecting the car. A plurality of cable drive pulleys for the cables are arranged above and below the lifting passage, and the plurality of cable drive pulleys are driven to move the car. On the gentle curve, a plurality of cable drive pulleys are grouped, and a drive motor for rotationally driving the plurality of cable drive pulleys is provided for each group, and each group corresponds to a pair of cars.

In addition, in this feature, it is preferable to install a fourth drive pulley on the other end side of the shaft on which the cable drive pulley is installed on one end side. The shaft is approximately the same length for each group. A second drive belt is mounted on one set, and the motor drives the second drive belt through the first drive belt, so that the plurality of cable drive pulleys of the same set rotate at the same rotational speed. In addition, it is preferable to arrange the cable connecting portion at a diagonal position on the upper part of the car, and to arrange the cable drive pulley and the second cable drive pulley at a position corresponding to the diagonal position of the car at the position above the lifting passage and the position where the car goes straight. 4. The pulley is driven, and the cable connecting portion for the paired car is connected to the cable to form a ring body of the cable of 2 systems.

In the above-mentioned features, it is preferable that the drive mechanism has two cable drive systems corresponding to the two systems of cables, a belt drive shaft having a differential gear device is arranged between the cable drive systems, and a belt drive shaft is installed in the middle of the belt drive shaft. There is a second driving pulley, and a third driving pulley is installed at both ends. The first driving pulley and the second driving pulley installed on the motor are connected by the first driving belt, and the third driving pulley arranged at the ends of the two shafts is connected. The pulleys are respectively connected to the 4th drive pulley by the 2nd drive belt, the 2nd drive belt, the 3rd drive pulley, and the 4th drive pulley constitute the cable drive system, and the drive mechanism drives the two cable drive systems synchronously.

More ideally, the cable connection part can be formed in rotation, and a balance weight and a rotation attenuation device can be installed on the rotation axis of the cable connection part, or a cable can be installed on the cable connection part to adjust the tension of the cable and absorb the expansion and contraction of the cable length. spring, or install other drive mechanisms that can move the car independently in the up and down direction on the cable connection, or install the drive motor above the cable 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 arranged at a position separated from the top, or between the fourth drive pulleys, and the second tension roller that stretches the second belt is arranged above the first tension roller, and the tension of the second belt is detected. A fracture sensor for fracture is provided on the second tension roller or the third drive pulley, and a brake device having an electromagnetic coil for applying a braking force to the fourth drive pulley is provided near the fourth drive pulley. In addition, a detection device for detecting the breakage of the second belt may be installed near the second belt, and a brake device may be installed on the output shaft of the differential gear device. After the detection device detects the breakage of the second belt, the The braking device operates.

Description of drawings

Fig. 1 is a front view of one embodiment of the multi-car elevator of the present invention.

Fig. 2 is an enlarged view of a linear movement section of a multi-car elevator.

Fig. 3 is an enlarged view of a reverse movement section of a multi-car elevator.

Fig. 4 is a cross-sectional view of a multi-car elevator.

Figure 5 is a detailed front view of a cable connection used in a multi-car elevator.

Fig. 6 is a perspective view illustrating a drive device used in a multi-car elevator.

Fig. 7 is a front view illustrating a driving device used in a multi-car elevator.

Fig. 8 is a perspective view illustrating a drive device used in a multi-car elevator.

Fig. 9 is a front view of the emergency stop system.

Detailed ways

An embodiment of the multi-car elevator of the present invention will be described below using the drawings. Fig. 1 shows the overall configuration of a multi-car elevator and is a front view thereof. There is formed a circulation path composed of vertically arranged vertical paths 1A, 1B and reverse movement sections 2A, 2B located above and below these vertical paths 1A, 1B. In the circulation path, six cars 3 move clockwise around. The cages 3A and 3B are arranged symmetrically at approximately half the length of the circulation path, and the cages 3A and 3B are connected by cables 4A and 4B. The pair of cars 3A, 3B and the pair of cables 4A, 4B form one group. Similarly, the pair of cars 3C and 3D and the pair of cars 3F and 3F are connected by other cables not shown to form another group. In this embodiment, six cars 3 constitute three groups.

Cable connectors 5 are attached to the left front and right rear of the upper surfaces of the respective cages 3A to 3F. Two systems of a cable 4A connected to the left front of the cars 3A to 3F and a cable 4B connected to the right rear of the cars 3A to 3F are used. The cables 4A and 4B of each system are wound around a plurality of first pulleys (not shown in FIG. 1 ) arranged in upper and lower cable connection guide rails 13A to 13D which will be described in detail later to form a loop.

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

Different output shafts are connected to the differential gear 6 a in the front and rear directions, the front output shaft drives the front cable 4A, and the rear output shaft drives the rear cable 4B. Therefore, belt drive pulleys are respectively attached to the front and rear output shafts of the differential gear 6a. A drive belt 24 is stretched over the belt drive pulley. The driving belt 24 is also stretched over the second pulley coaxially attached to the plurality of first pulleys arranged in the upper cable connector guide rails 13A, 13B. Therefore, when the second pulley rotates, the first pulley also rotates, and the car 3 is circulated by the frictional force of the cables 4A and 4B stretched over the first pulley.

In FIG. 2 , the front view shows how the car 3A is arranged in the elevator passage 1A moving upward. The other cars 3B to 3F and the elevator passage 1B also have the same configuration and operation. Linear guide rails 9A and 9B extending vertically are arranged on both left and right sides of the ascending and descending passage 1A. The guide rail 9B also serves as a guide rail for the adjacent lift passage 1B. Guide rollers 8 are attached to the left and right ends of the upper surface of the car 3A and the left and right ends of the lower surface of the car 3A so as to be rotatable along the guide rails 9A and 9B. Therefore, the car 3A can ascend along the guide rails 9A and 9B in the ascending and descending passage 1A by using the guide rollers 8 installed up, down, left, and right.

On the upper surface of the car 3A, there is provided a cable connecting member 5 for attaching the cables 4A, 4B for suspension-driving the car 3A to the car 3A. On the car 3A, a cable connector support member 14 is attached so as to extend upward, and a rotary shaft 15 extending in the horizontal direction is provided on the cable connector support member 14 . The rotating shaft 15 is freely rotatably combined with the cable connector 5 . When the rotating shaft 15 and the cable connector 5 are arranged in this way, even if the rotating shaft 15 is arranged on the axes of the cables 4A and 4B, the cable connecting member 5 will fall due to its own weight. Therefore, the frame shape and the like of the cable connector 5 are adjusted so that the center of gravity of the cable connector 5 coincides with the axes of the cables 4A and 4B.

Therefore, in this embodiment, the cable connection member counterweight 7 is installed on the rotating shaft 15 of the cable connection member 5 . In addition, in order to suppress the vibration caused by the swing of the cable connector 5 , a rotation damper (not shown) is attached to the rotating shaft 15 . Moreover, in the present embodiment, although the counterweight 7 is used to prevent the cable connector 5 from toppling over, it is also possible to set a linear guide rail extending up and down that supports the cable connector 5 in the lifting passages 1A, 1B, and connect the cable The cable connector guide roller 12 is set on the part 5, so that the guide roller 12 is pushed against the guide rail. In addition, instead of the cable link weight 7 or the rotation damping device, a stopper that restrains the rotation of the rotary shaft 5 may be installed.

FIG. 3 shows details of a reverse movement section 2A in which the car 3A reversely moves from the left elevator passage 1A to the right elevator passage 1B. The lower reverse movement section 2B also has the same configuration, and the operation of the car 3A in the lower reverse movement section 2B is also the same. One guide rail 9A among the guide rails 9A, 9B provided in the ascending and descending passages 1A, 1B is provided at a position slightly protruding from the ascending and descending passage 1A toward the reverse movement section 2A side. On the other hand, the guide rail 9B is provided only at a position on the inner side of the height of the car 3A in the lift passages 1A and 1B. This is to allow the car 3A to traverse the lift passages 1A, 1B in the reverse movement sections 2A, 2B.

In the reverse movement sections 2A and 2B, since there are no left and right guide rails 9A and 9B that support the car 3A, the car 3A is provided with reverse guide rails 11A and 11B that are in contact with the reverse guide rollers 10 installed on the lower side. In the lifting passage 1A, 1B. The guide rails 11A and 11B for reversing are formed in an arc shape, and are disposed at the front side of the car 3A and at the rear side of the car 3A so as not to interfere with the car 3A when the car 3A moves laterally. Location.

Above the guide rail 9B, the guide rails 11A, 11B become discontinuous. This is to avoid a situation where the cable connection 5 and the guide rails 11A, 11B interfere. Notches 11x, 11y are formed at portions where the movement locus of the cable connector 5 intersects with the guide rails 11A, 11B. The guide rails 11A and 11B are arranged so that the other guide roller 10 can contact the reverse guide rail 11B to support the car 3A before the one guide roller 10 passes through the reverse guide rail 11A and reaches the notch 11x. Furthermore, in the lower reverse movement section 2B, since the guide roller 10 can run smoothly without interfering with the cable connector 5 and the guide rail 11, no notch is formed.

The cable connecting member 5 provided on the upper surface of the car 3A can swing around the rotating shaft 15, and the rotating shaft 15 is sandwiched between the cable connecting member 5, and two cable connecting member guide rollers 12 are installed on one side. One cable connector guide roller 12 is attached to the other surface substantially at the position of the rotating shaft 15 . Cable connector guide rails 13A, 13B for guiding the cable connector guide roller 12 are provided in the reverse movement section 2A. The end points of the cable connection guide rails 13A, 13B extend slightly into the lifting section 1A, 1B. The cable connector guide rails 13A, 13B have a shape similar to that of the reversing guide rails 11A, 11B, and are arranged so as to change positions in the front-rear direction. In addition, since there are no interfering members on adjacent sides of the ascending and descending passages 1A, 1B, they overlap each other in the left-right direction.

Also in the lower reverse movement section 2B, cable connector guide rails 13C and 13D are provided in the same manner. The cable connector guide rails 13C and 13D are formed in a shape similar to the reversing guide rail 11 disposed on the lower side, and overlap each other on the inside in the left-right direction. The cable connector guide rails 13C and 13D are also provided so as to change positions from each other in the front-back direction. In this way, the car 3A can be moved along the cable connector guide rails 13A to 13D having curved portions. Therefore, in the car 3A, the cable connector guide roller 12 is brought into contact with the cable connector guide rails 13A to 13D provided at the upper part, and the reversing guide roller 10 is brought into contact with the reversing guide rails 11, 11A, 11B provided at the lower part. Laterally moving, therefore, the swaying of the car 3A can be suppressed.

Details of the installation position of the cable connector 5 , the positions of the cable connector guide rails 13A to 13D, and the positions of the reversing guide rails 11 , 11A, and 11B will be described with reference to FIG. 4 . Fig. 4 is a cross-sectional view of a multi-car elevator disposed on an elevator shaft. The lower side of the drawing is the front door side, and the upper side of the drawing is the rear side. When the car 3A is taken as an example, the cable connecting member 5 is protrudingly disposed behind the rear left corner of the car 3A and in front of the front right corner of the car 3A. The cables 4Ba and 4Aa extending from the two cable connectors 5 suspend the car 3A. Therefore, when the center of gravity of the car 3A coincides with the midpoint of the line connecting the two cable connectors 5, the car 3A can be stably raised and lowered without applying an offset load to the cables 4Ba, 4Aa. Thus, the pair of cables 4Aa, 4Ba of the suspended cars 3A, 3B, the pair of cables 4Ab, 4Bb of the suspended cars 3C, 3D, the pair of cables 4Ac, 4Bc of the suspended cars 3E, 3F, They are arranged such that the inner side becomes the inner side (4Aa, 4Ba), the middle side becomes the middle side (4Ab, 4Bb), and the outer side becomes the outer side (4Ac, 4Bc) with respect to the cages 3A-3F, respectively.

The guide rails 11, 11A, and 11B for reversing are provided on the car 3A separated from the passage area of the cars 3A to 3F so that the cars 3A to 3F can also pass through the reversing movement sections 2A and 2B as described above. ~ Front and rear direction of 3F. Corresponding to the guide rails 11, 11A, and 11B for reversing, guide rollers 10 for reversing are provided at four positions, front, rear, left, and right, on the lower side of the cages 3A to 3F. On the outer side in the front-rear direction of the reversing guide rail 11 , a cable connector guide rail 13 is provided.

The details of the cable connector 5 will be described using the front view shown in FIG. 5 . The cable connector 5 attached to the upper right front side of the car 3A will be described as an example. The rotation shaft 15 is attached to the longitudinal center portion of the elongated cable connector frame 16 having the wide portion 16b formed in the center. A pair of upper and lower cable connection pulley shafts 21 extends in the horizontal direction in the vicinity of the longitudinal end of the wide portion 16b, and a cable connection pulley 17 is attached to each cable connection pulley shaft 21 . After the upper cable 4Aau is wound around the cable connection pulley 17, it is connected to one end of the spring bar 18 by the joint 18b.

At the other end of the spring rod 18, a screw thread is formed, and a nut 20 is screwed together. On the spring rod 18 , a spring 19 is mounted, 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 stop 22 mounted on the cable connector frame 16 . At this time, the spring rod 18 slides in the hole formed in the spring stopper 22 . When the nut 20 is tightened, a restoring force is generated in the spring 19, applying sufficient tension to the cables 4Aau, 4Aad.

Moreover, the cable 4Aad on the lower side also has the same structure. Therefore, according to this embodiment, the cables 4Aau in the traveling direction and the cables 4Aad in the backward direction of the car 3A form a loop, and these cables 4Aau, 4Aad are independently connected by the cable connector 5 . This makes it easier to adjust or replace the cable when the cable is elongated than when a single loop cable is used.

In this embodiment, the cable connector frame 16 and the cable connection pulley shaft 21 can be slid in the up and down travel direction of the car 3A. The cars 3A, 3B connected by the cables 4Aa, 4Ab are independently and slightly moved. Since the cars 3A to 3D can be moved slightly, the leveling adjustment when the elevator stops at the boarding place becomes easier. It is also possible to set up and down telescopic mechanisms on the cable connector supporting part 14 to adjust the leveling. Also, in this embodiment, tension is applied to the cables 4Aa and 4Ab using the spring 19, but if a rotary actuator is attached to the cable connector pulley shaft 21, the tension of the cables 4Aa and 4Ab can be actively adjusted.

The details of the drive system 41 for driving the cables 4Aa of the cars 3A, 3B are shown in perspective view in FIG. 6 . This FIG. 6 is a view of the upper side of the car 3A seen from the front when the car 3A is in the hoistway 1A. The driving system 41 of the front side cable 4Aa is shown. The drive system 41 is located above the front right side of the car 3A. In the reversing movement section 2A formed above the lifting passage 1A, a partially arc-shaped cable connector guide rail 13A is fixed. Two cable connector guide rails 13A of the same shape are arranged to face each other, and the cable drive pulley 26 and the idler pulley 38 on which the cable 4Aa is stretched are arranged between the cable connector guide rails 13A.

The pulleys 26, 38 are arranged along the cable connector guide rail 13A. There are seven cable drive pulleys 26 in this embodiment, and one idler pulley 38 is provided at each of the two ends of the cable drive pulley 26 row. Each cable driving pulley 26 is fixedly installed on the head end side of the pulley connection shaft 27 of the cable connector guide rail 13A penetrating one side (the front side in FIG. 6) on the cable connector rail 13A. On the opposite end of the pulley connection shaft 27, a fourth belt drive pulley 25D, which will be described in detail later, is fixedly attached. Therefore, the fourth belt drive pulley 25D and the cable drive pulley 26 rotate together.

The drive system 42 for driving the rope 4Ba is also provided with the same configuration on the opposite side of the drive system (the rear side of the car 3A) across the car 3A. In order to achieve synchronization of the two cables 4Aa, 4Ba, the two cable drive systems 41 , 42 are driven by the same drive motor 23 . In FIG. 6 , the details of the drive system 42 that drives the cables 4Ba on the rear side of the car 3A are omitted. In order to drive the two cable drive systems 41, 42 with the same drive motor 23, the second drive belt 24B is driven by the third belt drive pulley, wherein the second drive belt 24B is mounted on the head end portion fixedly arranged on the belt drive shaft 29. On the 3rd belt drive pulley 23C. A second belt drive pulley 25B is fixedly installed in the middle of the belt drive shaft 29, and a first drive belt 24A is spanned between the second belt drive pulley 25B and the first drive pulley mounted on the head end of the drive motor 23.

In this embodiment, the power of the drive motor 23 is transmitted to the belt drive shaft 29 using the first drive belt 24A, but if the drive motor 23 can be arranged near the belt drive shaft 29, a gear transmission mechanism can be used. In addition, in FIG. 6 , illustration of the differential gear 6 is omitted.

The belt drive shaft 29 is disposed obliquely above or above the cable connector guide rail 13A. The 2nd drive belt 24B that is installed on the 3rd belt drive pulley 25C that is located at the head end of the belt drive shaft 29 is also spanned over the 2nd drive belt 24B that is located at the head end of the pulley connection shaft 27 that passes through the cable connector guide rail 13A and is configured. 4 belt drive pulleys on 25D. In addition, in order to apply tension to the second drive belt 24B and provide sufficient frictional force to the fourth belt drive pulley 25D, a tension roller 28 is arranged between the fourth belt drive pulleys 25D and 25D. The second drive belt 24B is stretched over. The 4th belt drive pulley 25D is arranged at both ends of the drive pulley block formed by the 4th belt drive pulley 25D and the tension roller 28, and the top of the 4th belt drive pulley 25D at this end is provided with the second drive belt 24B. For proper tension, three second tension rollers 28A to 28C are arranged.

In the cable drive system 41 comprised in this way, the cable 4Aa is wound around the several cable drive pulley 26 and the idler pulley 38 arrange|positioned in an arc shape or gentle curve shape. One cable drive pulley 26 is directly connected to one fourth belt drive pulley 25D via a pulley connection shaft 27 . The pulley connection shaft 27 is pivotally supported on the cable connector guide rail 13A. The plurality of cable drive pulleys 26 are rotated synchronously by the second drive belt 24B wound around the fourth belt drive pulley 25D.

According to this embodiment, a plurality of cable drive pulleys 26 are rotated together using one drive motor 23, and the cars 3A, 3B can be synchronously driven by the traction force of the cables 4Aa, 4Ba and the cable drive pulley 26. In addition, since the plurality of cable driving pulleys 26 are arranged in an arc shape or a gentle curve shape including a straight line, the same driving force as when using a single large-diameter pulley is generated, so the car 3A can be reversed. It is suppressed that the tension of the cables 4Aa, 4Ba fluctuates rapidly during movement. In addition, according to the present embodiment, when the car 3A passes through the reverse movement sections 2A, 2B, the cable connector guide roller 12 moves on the cable connector guide rail 13 . This prevents the cable connector 5 from colliding with the cable drive pulley 26 .

And when the diameter of the 3rd belt drive pulley 25C attached to the front and back of the belt drive shaft 29 differs, the rotation speed of the cable drive pulley 26 of front and rear just differs. At this time, either one of the two cables 4Aa, 4Ba drives the car 3 while slipping with the cable drive pulley 26 . As a result, the wear of the cable 4 is accelerated. In this embodiment, the differential gear 6 (not shown) is interposed between the belt drive shafts 29 connected to the above-mentioned third belt drive pulley 25C. In this way, the difference in rotational speed due to the difference in diameter of the two third drive pulleys 25C can be absorbed.

In the above-mentioned embodiment, the drive system of one pair of cars 3A, 3B was described, and FIG. 7 shows the details of the drive system when three pairs of cars 3A to 3F are installed in the same elevator passage as shown in FIG. 1 . Condition. Fig. 7 is a front view of a drive system for driving 3 pairs of car groups. When the cars 3A-3F are in the lifting passage 1A, the driving system is located at the upper right front of the cars 3A-3F.

The first car group with a notation a, the second car group with a notation b, and the third car group with a notation c are driven by respective different drive motors 23a to 23c. In order to simplify the description, only a part of the first car group will be described below.

A drive belt 24Aa is stretched over the first drive pulley 25Aa attached to the shaft end of the drive motor 23a. This drive belt 24Aa moves independently of the other drive belts 24Ab, 24Ac. Groups of fourth belt drive pulleys 25Da to 25Dc that drive drive belts 24Aa to 24Ac are formed for each car group. The cable drive pulley 26 is connected to each 4th belt drive pulley 25D. The 4th belt drive pulley 25Da, 25Db, 25Dc is arrange|positioned so that it may deviate along the moving direction of the cable 4Aa, respectively.

That is, the fourth belt drive pulley 25Db for driving the second car group is disposed between the fourth belt drive pulley 25Da for driving the first car group and the fourth belt drive pulley 25Dc for driving the third car group. Moreover, the 4th belt drive pulley 25Dc which drives the 3rd car group is arrange|positioned between the 4th belt drive pulley 25Db which drives the 2nd car group, and the 4th belt drive pulley 25Da which drives the 1st car group. Center tension rollers 28Ba to 28Bc arranged between the fourth drive pulley so as to give appropriate tension to the second drive belts 24Ba to 24Bc are also arranged with a left-right shift.

The details of the cable drive pulley are shown in perspective view in FIG. 8 . The cables 4Aa to 4Ac that drive the respective car groups are arranged with their positions shifted in the front-rear direction in order to reduce the distance between the cable drive pulleys 26a to 26c. Since the cables 4Aa to 4Ac are shifted forward and backward, the cable drive pulleys 26a to 26c on which the respective cables 4Aa to 4Ac are stretched are also shifted in the front and rear direction. Moreover, the 4th belt drive pulleys 25Da-25Dc are shifted and arrange|positioned similarly to the cable drive pulleys 26a-26c in the front-back direction so that the 2nd drive belts 24Ba-24Bc may not interfere.

Since the cable drive pulleys 26a to 26c for driving other car groups are arranged in a front-back, left, and right shift, even if the number of cars increases, the drive pulleys 26a to 26c do not interfere with adjacent objects. As a result, the dimensions in the thickness direction of the driving pulleys 26a to 26c can be shortened, and the space of the driving device can be further saved. That is, by using a plurality of small-diameter pulleys as a drive mechanism, the elevator can be downsized. In addition, since each group of cars is driven by a different driving motor, the cars can be moved independently and the conveying force can be improved.

On the driving system 41, 42 of the cable, a safety device is installed. Details of the safety device are shown in front view in FIG. 9 . This safety device is a device for making an emergency stop when the second drive belt 24B breaks due to any problem. When the second drive belt 24B breaks, all the cable drive pulleys 26 connected to the pulley connecting shaft 27 by the fourth drive pulley 25D will idle. Therefore, even if the cars 3A to 3F are moving or stopped, due to the weight of passengers, for example, the weight of the car 3A and the car 3B will be unbalanced, and the cars 3A and 3B will fall on one side and rise on the other side. .

If the abnormal movement of the cars 3A and 3B continues, collisions with other cars 3C to 3F may occur. In order to prevent this collision, the second tension roller 28E in the center is provided with a detection mechanism for detecting the breakage of the second drive belt 24B. That is, a detection spring 30 as a pressing spring is attached to the tension roller 28E, and a detection switch 31 is provided on an operating shaft of the detection spring 30 .

On the other hand, on the inner side of the arc portion of the cable connector guide rail 13A, a concave arc-shaped braking pad 33 corresponding to the outer shape of the fourth belt drive pulley 25D and the outer shape of the tension roller 28 is formed, and is It is arranged near the fourth belt drive pulley 25D and the tension roller 28 . In the middle part of the brake pad 33, a movable iron core 35 is attached. Around the movable iron core 35, the electromagnetic coil 34 is arranged.

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

The safety device of the present embodiment thus constituted operates as follows. When the drive belt 24B breaks, the tension roller 28E is pushed toward the detection switch 31 by the restoring force of the detection spring 30 , and finally brought into contact with the detection switch 31 . When the switch 31 for detection is pushed against the second tension roller 28E, an input signal is generated at the switch 31 for detection, and an abnormal signal is transmitted to the braking device 32 .

Since the electromagnetic coil 34 is always energized, the movable iron core 35 is attracted to the lower side in the figure in a normal state, and a gap is formed between the belt drive pulley 25D and the brake pad 33 . When an abnormal signal is transmitted to the braking device 32 , the braking device 32 stops energizing the electromagnetic coil 34 . As a result, the restoring force of the support spring 37 acts to push the brake pad 33 against the belt drive pulley 25D. The rotation of the belt drive pulley 25D is stopped by the brake pad 33 . Since the rotation of the belt drive pulley 25D stops, the rotation of the cable drive pulley 26 directly connected by the pulley connection shaft 27 also stops.

According to this embodiment, the car can be forcibly stopped by utilizing the frictional force between the cable driving pulley and the cable. When the elevator is equipped with the safety device shown in this embodiment, for example, even if a failure such as a power failure occurs, the car can be forcibly stopped, and when the power is re-energized after the power failure, the operation can be quickly restarted. Furthermore, in the present embodiment, although the brake pad 33 is pressed against the belt drive pulley 25D, the brake pad 33 may be pressed against the cable drive pulley 26 or the pulley connection shaft 27 .

In addition, in this embodiment, one car group is stopped, but the shape of the brake pad 33 may be changed, and all the car groups may be stopped by one brake pad 33 . At this time, when one car group stops suddenly, the other car groups also forcibly stop, so that the collision between the cars can be reliably prevented.

In the embodiment of the multi-car elevator, although the cars are driven by the front and rear two cables, if the belt of the driving device on one side breaks, the braking device mounted on the driving motor 23 can also be activated. At this time, since the rotation of the cable drive pulley of the other driving device whose belt is not broken can be restrained, the car can be stopped. In addition, a braking device that constrains the rotation of the belt drive shaft 29 that connects the two cable drive systems 41, 42 may be provided near the belt drive shaft 29 to stop the rotation of the belt drive shaft 29 and restrict the rotation of the cable drive pulley 26. rotate.

In the above-described embodiment, although six cars 3A to 3F are arranged in the same elevator passage 1A, 1B to form three groups, it is also possible to arrange four cars in the same elevator passage to form two groups. It is also possible to arrange 8 cars in the same elevator passage to form 4 groups. In addition, in the above-mentioned embodiment, although the cables of the two systems in the front and rear of the car are simultaneously driven by one drive motor, it is also possible to use two drive motors to drive the cables of one system each. At this time, it is necessary to make the two drive motors rotate synchronously.

In addition, in the above-described embodiment, the drive motor 23 is arranged in the upper central portion of the lift passages 1A, 1B. However, for example, due to the planning of the building, when the height of the hoistway is limited or when a group of cars is driven by two drive motors, any one of the cable connection shaft and the drive motor shaft can be used in combination. In addition, in the above-mentioned embodiment, although the detection mechanism for detecting the breakage of the second driving belt is provided on the second tension roller, it may be provided on the third belt driving pulley 25C. In addition, although the driving pulley is arranged in an arc shape, it is also possible to combine arcs, straight lines, elliptic curves, etc. to form a curve with small curvature fluctuations. Less, ride comfort is improved.

In the above-mentioned embodiment, although the ascending passage 1A and the ascending passage 1B are formed separately, the ascending and descending passage may be divided and used by disposing the ascending and descending rail 9B in the middle part in one ascending and descending passage. That is, of course, a structure in which two cars can be juxtaposed in one elevator shaft is also possible.

According to the present invention, since the paired cars are connected by cables to form a circulating ring body, the ring body is driven independently, and the shape of the ring body is set into an egg shape, so the multi-car elevator can be operated stably . In addition, vibration and noise can be reduced because sudden changes in the load on the cable are moderated.

The preferred embodiments described here are only exemplary rather than limiting, and the present invention also includes all changes belonging to the contents of the technical solutions.

Claims (13)

1. A circulation-type multi-car elevator, characterized in that it has a plurality of pairs of passenger cars connected to passenger cars on both ends of 2 cables arranged on diagonals, and is configured in flexible Multiple cable drive pulleys on a gentle curve, or a mixture of gentle curves and straight lines, drive the cables connecting the pairs of passenger cars. 2. The circulation-type multi-car elevator according to claim 1, wherein the plurality of cable drive pulleys are individually arranged on each passenger car, and are mutually changed along the moving direction of the passenger car Location configuration. 3. The circular multi-car elevator according to claim 1, further comprising a cable driving mechanism for driving the two cables, The cable drive mechanism has a drive motor, a belt drive shaft that transmits the power of the drive motor to the cable drive system, and a first drive belt mounted on the belt drive shaft and the drive motor, wherein the cable drive system is arranged diagonally. The cables transmit power, The cable drive system includes drive pulleys coaxially fixed to the plurality of cable drive pulleys and rotating synchronously, tension rollers positioned between the drive pulleys, and a second drive belt stretched over the drive pulleys and tension rollers. 4. A multi-car elevator, characterized in that a plurality of cars are arranged in the lifting passage, and a cable connecting the plurality of cars in pairs and a drive mechanism for driving the cable are provided, and the drive mechanism It has a plurality of cable drive pulleys on which the cables are erected, and the plurality of cable drive pulleys are arranged above and below the lifting passage, and the plurality of cable drive pulleys are driven to move the car, wherein the plurality of cable drive pulleys are driven The pulleys are distributed on arcs or gentle curves, and the plurality of cable drive pulleys are grouped, and each group is provided with a drive motor that rotates and drives the plurality of cable drive pulleys, and each group is connected to the car Correspondence. 5. The multi-car elevator according to claim 4, wherein a fourth drive pulley is mounted on the other end side of the shaft on which the cable drive pulley is mounted at one end, and the shaft is substantially the same for each group. The length of the second driving pulley is set on the fourth driving pulley for each group, and the motor drives the second driving belt through the first driving belt, so that a plurality of cable driving pulleys of the same group rotate at the same speed. 6. The multi-car elevator according to claim 5, characterized in that the cable connection portion is arranged at a diagonal position on the upper part of the car, and the car on the position above the lifting passage and directly advancing with the car The cable drive pulley and the fourth drive pulley are arranged at positions corresponding to the diagonal positions of the car, and the paired car cable connection parts are connected to the cables to form a loop of two systems of cables. 7. The multi-car elevator according to claim 6, wherein the drive mechanism has two cable drive systems corresponding to the two systems of cables, and a differential gear device is arranged between the cable drive systems The belt drive shaft, the second drive pulley is installed in the middle part of the belt drive shaft, the third drive pulley is installed at both ends, the first drive pulley and the second drive pulley installed on the motor Connected by the first drive belt, on the third drive pulley arranged at the ends of the two shafts, respectively connected to the fourth drive pulley by the second drive belt, the second drive belt and the third drive pulley, the fourth drive pulley The drive pulley constitutes a cable drive system, and the drive mechanism drives the two cable drive systems synchronously. 8. The multi-car elevator according to claim 7, wherein the cable connecting portion is formed to be rotatable, and a balance weight and a rotation damping device are provided on the rotating shaft of the cable connecting portion. 9. The multi-car elevator according to claim 6, characterized in that a telescopic spring capable of adjusting the tension of the cable and absorbing the length of the cable is installed on the cable connecting portion. 10. The multi-car elevator according to claim 6, wherein another driving mechanism capable of independently moving the cars in the vertical direction is provided on the cable connecting portion. 11. The multi-car elevator according to claim 7, wherein the drive motor is installed above the cable drive pulley and the fourth drive pulley or at a position separated from the belt drive shaft in the axial direction superior. 12. The multi-car elevator according to claim 7, wherein a first tension roller for applying tension to the second belt is arranged between the fourth drive pulleys, and a tension roller is arranged above the first tension roller. For the second tension roller of the second belt, a fracture sensor that detects the fracture of the second belt is installed on the second tension roller or the third drive pulley, and the fourth drive pulley is installed near the fourth drive pulley. The pulley imparts braking force and has a braking device with an electromagnetic coil. 13. The multi-car elevator according to claim 7, characterized in that a detection device for detecting the breakage of the second belt is provided near the second belt, and is installed on the output shaft of the differential gear device. The brake device operates the brake device after the detection device detects the breakage of the second belt.

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