Multi-car elevator

Abstract

For multiple cars of a multi-car elevator installed in one hoistway, the present invention uses a single counterweight to provide a counterweight function of the same weight for each car or uses the equal number of counterweights. In one counterweight, a counterweight rope for connecting each car may be connected to a car rope or a car pulley. All ropes are arranged on an imaginary radial straight line in different direction from a center vertical line of the car. The multi-car elevator according to the present invention uses minimal space. The present invention can be implemented with minimum changes to a conventional elevator.

Description

Multi-car elevator

[0001] Conventional elevators typically operate with a single car within a single shaft. Multi-car elevators operate with multiple cars within a single shaft. Multi-car elevators could significantly improve elevator efficiency. While related technology has been developed, it has not yet reached a practical level.

[0002] Conventional multi-car elevators faced difficulties installing counterweights for each car. This was due to the lack of a practical way to route multiple counterweights within a single hoistway without colliding with each other. Widening the hoistway would have been prohibitively expensive, making it unconceivable. Because there was no practical way to operate multiple counterweights, connecting counterweights to each car was also out of the question.

[0003] The challenge to be solved is to provide a necessary counterweight or counterweight function for each car when operating multiple cars in a single elevator shaft.

[0004] Additionally, the challenge to be solved is to provide a method for connecting the counterweight and rope to each car and a method for driving multiple cars.

[0005] In the present invention, different solutions are used depending on whether the same number of balance weights are used for multiple cars or whether one balance weight is used.

[0006] When a single counterweight is used, one or more counterweight pulleys are installed as movable pulleys on the counterweight, and one counterweight rope is used for one or more counterweight pulleys. One or more counterweight pulleys are movable pulleys that move together with the counterweight.

[0007] Each car can be connected to the counterweight rope through a counterweight rope connecting car pulley installed in each car, and each car can be driven through a drive pulley connected to a differential device here, and each car can be installed with a counterweight rope connecting car pulley for each car, and connected to the counterweight rope through an intermediate pulley, a counterweight connecting car rope, and each car can be driven through a drive pulley connected to a differential device here, and each car can be driven through a drive pulley having two pulleys here, and each car can be installed with a drive pulley connecting car pulley for each car, and each car can be driven through a drive pulley, a drive pulley connecting car rope, and each car can be installed with a drive pulley connecting car pulley for each car, and each car can be driven through a car-side intermediate pulley, a counterweight-side intermediate pulley, an intermediate rope, a drive pulley connecting car rope, and a drive pulley, and can be connected to a counterweight rope. Alternatively, each car may be driven by a car pulley for connecting a drive pulley to each car, an intermediate pulley having two pulleys, a car rope for connecting the drive pulley, and the drive pulley, and may be connected to a counterweight rope, or each car may be driven by a car pulley for connecting a drive pulley to each car, an intermediate pulley on the counterweight side, a car rope for connecting the drive pulley, and the drive pulley, and may be connected to a counterweight rope.

[0008] All cars are connected to the counterweight through a counterweight rope and receive the force of the counterweight function.

[0009] In the present invention, when the same number of counterweights is used for a plurality of cars, each of the plurality of cars can be connected to each other using each counterweight rope, and each car can be driven by installing a car pulley for connecting a drive pulley to each car, and the car rope for connecting the drive pulley, or each car can be driven by a drive pulley having two pulleys on the counterweight rope.

[0010] All ropes connected to all cars are connected to the cars through pulleys installed at both ends on imaginary radial straight lines in different directions from the center vertical line of the cars, and all imaginary radial straight lines face in different directions so as not to overlap each other.

[0011] The multi-car elevator according to the present invention facilitates the operation of multiple cars within a single hoistway. This allows for the relatively simple conversion of a conventional elevator into a multi-car elevator by adding additional cars and installing counterweights, ropes, pulleys, etc. as needed, without expanding the existing hoistway and maximizing the use of existing equipment.

[0012] Fig. 1 shows an example of connecting a balance weight (21) and each car (1a, 1b, 1c) for multiple cars (1a, 1b, 1c) installed in one elevator shaft. Two balance weight pulleys (23) are installed as movable pulleys on the balance weight (21), and two balance weight rope connection car pulleys (5a, 5b, 5c) are installed on each car (1a, 1b, 1c) for connection to the balance weight rope (22), and the balance weight rope (22) connects the balance weight (21) and all cars (1a, 1b, 1c), and both ends of the balance weight rope (22) are fixed to the balance weight (21).

[0013] Fig. 2 shows another example of connecting a balance weight (21) to each car (1a, 1b, 1c) installed in multiple numbers in one elevator shaft. Three balance weight pulleys (23) are installed as movable pulleys on the balance weight (21).

[0014] Both ends of the counterweight rope (22) are fixed to the ceiling of the elevator shaft or an external location such as a building. Without further explanation, "fixed" refers to being fixed to the ceiling of the elevator shaft, the ceiling of the building, the floor, a pillar, a wall, etc. (hereinafter referred to as "fixed").

[0015] Fig. 3 shows another example of connecting a balance weight (21) and each car (1a, 1b, 1c) installed in multiple numbers in one elevator shaft. Three balance weight pulleys (23) are installed as movable pulleys on the balance weight (21), one end of a balance weight rope (22) is fixed and the other end is fixed to the balance weight (21), and the balance weight rope (22) is attached to the balance weight (21) seven times.

[0016] Fig. 4 shows another example of connecting a balance weight (21) to each car (1a, 1b, 1c) installed in multiple numbers in one elevator shaft. Four balance weight pulleys (23) are installed as movable pulleys on the balance weight (21), and both ends of the balance weight rope (22) are connected to each other.

[0017] Fig. 5 shows another example of connecting a balance weight (21) and each car (1a, 1b, 1c) installed in multiple numbers in one elevator shaft. Five balance weight pulleys (23) are installed as movable pulleys on the balance weight (21), a balance weight rope (22) is attached to the balance weight (21) 10 times, and both ends of the balance weight rope (22) are connected to each other.

[0018] Fig. 6 shows another example of connecting a balance weight (21) and each car (1a, 1b, 1c) installed in multiple places in one elevator shaft. Three balance weight pulleys (23) are installed as movable pulleys in the balance weight (21), four car pulleys (5a) are installed in one car (1a), and two car pulleys (5b, 5c) are installed in the remaining cars (1b, 1c), and a balance weight rope (22) connects the balance weight (21) and all cars (1a, 1b, 1c), and both ends of the balance weight rope (22) are fixed to the balance weight (21).

[0019] Fig. 7 shows another example of connecting a balance weight (21) and each car (1a, 1b, 1c) for multiple cars (1a, 1b, 1c) installed in one elevator shaft. Three balance weight pulleys (23) are installed as movable pulleys on the balance weight (21), and two car pulleys (5a, 5b, 5c) are installed on each car (1a, 1b, 1c), and the balance weight (21) and all cars (1a, 1b, 1c) are divided into two, and the balance weight ropes (22) are connected to one side first and then to each other.

[0020] Fig. 8 shows another example of connecting a balance weight (21) and each car (1a, 1b, 1c) installed in multiple places in one elevator shaft. In the balance weight (21), two balance weight pulleys (23) are installed as movable pulleys, both ends of the balance weight rope (22) are fixed to the balance weight (21), and the balance weight rope (22) connects three intermediate pulleys (18a, 18b, 18c) each having three pulleys and the balance weight pulley (23), and in the first car (1a), two fixed rods (12a) are installed, and both ends of the car rope (3a) for connecting the balance weight rope connecting the car (1a) and the balance weight rope (22) are fixed to the two fixed rods (12a), and the car rope (3a) connected to the fixed pulley (19) is connected to two pulleys in the intermediate pulley (18a), and in the second car (1b), two fixed rods (12b) are installed, and connect the car (1b) and the balance weight rope (22). One end of a car rope (3b) for connecting two counterweight ropes is fixed to two fixed bars (12b), and the other ends of the two car ropes (3b) are respectively connected to two pulleys in the middle pulley (18b), and two car pulleys (5c) are installed in the third car (1c), and both ends of the car rope (3c) for connecting the counterweight ropes connecting the car (1c) and the counterweight rope (22) are respectively fixed, and the car ropes (3c) connected to the two car pulleys (5c) are respectively connected to two pulleys in the middle pulley (18c).

[0021] Fig. 9 shows another example of connecting a balance weight (21) and each car (1a, 1b, 1c) for the cars (1a, 1b, 1c) installed in a single elevator shaft. The balance weight rope (22) connects two balance weight-side intermediate pulleys (16b, 16c) and an intermediate pulley (17a) having two pulleys and a balance weight pulley (23). In the first car (1a), both ends of the car rope (3a) are respectively fixed to two fixed rods (12a), in the second car (1b), one end of the two car ropes (3b) is respectively fixed to two fixed rods (12b), and the other end is fixed to the intermediate pulley (16b), and in the third car (1c), both ends of the car rope (3c) are respectively fixed to the intermediate pulley (16c).

[0022] Fig. 10 shows an example in which two drive pulley connection car pulleys (4a) are installed on the car (1a) for connection of a drive device for the car (1a) shown in Figs. 1 to 9, and a drive pulley (6a) having one pulley connected to the car pulley (4a) and a traction machine, etc., is connected using a car rope (2a) for connection of the drive pulleys.

[0023] Fig. 11 shows an example of an integrated installation of a part related to a balance rope (22) connected to a balance weight (21) for a car (1a) shown in Figs. 1 to 7, and a car pulley (4a), a car rope (2a), and a driving pulley (6a) shown in Fig. 10.

[0024] Fig. 12 shows an example in which a fixed rod (13a), a car pulley (4a) for connecting a drive pulley, and a drive pulley (6a) are installed on the car (1a) for connecting a drive device for a car (1a) shown in Figs. 1 to 9, and the car pulley (4a) and the drive pulley (6a) are connected using a car rope (2a) for connecting the drive pulley.

[0025] Fig. 13 shows an example of an integrated installation of a part related to a balance rope (22) connected to a balance weight (21) for a car (1a) shown in Figs. 1 to 7, and a fixed rod (13a), a car pulley (4a), a car rope (2a), and a driving pulley (6a) shown in Fig. 12.

[0026] Fig. 14 shows an example in which, for one car (1a) shown in Figs. 1 to 7, a part related to a balance rope (22) connected to a balance weight (21) is supplemented with drive pulleys (8a) connected to both sides of two differential devices, and the two drive pulleys (8a) are respectively connected to the balance rope (22) and respectively connected to both axles of a differential device (9a). The drive shaft (10a) of the differential device (9a) can be connected to a traction machine or the like in practice.

[0027] FIG. 15 shows another example in which the driving pulleys (7a, 7b, 7c) having two pulleys are connected to each of the car ropes (3a, 3b, 3c), each of the car ropes (3a, 3b, 3c), the fixed rod (12a, 12b), the car pulley (5c), and the car (1a, 1b, 1c) for driving the respective cars (1a, 1b, 1c) and are connected to the respective car ropes (3a, 3b, 3c).

[0028] In Fig. 16, the middle pulleys (18a, 18b, 18c) are all shown at the upper end.

[0029] In Fig. 17, only one intermediate pulley (18a) is shown at the lower end.

[0030] In Fig. 18, only the two middle pulleys (18a, 18b) are shown at the lower end.

[0031] In Fig. 19, the intermediate pulleys (18a, 18b, 18c) are all shown at the lower end. The distance that the intermediate pulleys (18a, 18b, 18c) are separated from each other corresponds to half the travel distance of each car (1a, 1b, 1c).

[0032] Fig. 20 shows another example of connecting a drive pulley (6a, 6b, 6c), a counterweight (21), and each car (1a, 1b, 1c) with one pulley for each of the cars (1a, 1b, 1c) installed in a plurality of ways in one elevator shaft. Car ropes (2a, 2b, 2c), car pulleys (4a, 4b, 4c), drive pulleys (6a, 6b, 6c), car-side intermediate pulleys (15a, 15b, 15c), intermediate ropes (14a, 14b, 14c), counterweight-side intermediate pulleys (16a, 16b, 16c), counterweights (21), counterweight pulleys (23), and counterweight ropes (22) are used.

[0033] Fig. 21 is a variation of Fig. 20, in which all intermediate ropes (14a, 14b, 14c) shown in Fig. 20 are eliminated, the car-side intermediate pulleys (15a, 15b, 15c) and the counterweight-side intermediate pulleys (16a, 16b, 16c) are each integrated to form intermediate pulleys (17a, 17b, 17c) each having two pulleys, and the counterweight rope (22) is shown as an example extended longer.

[0034] Fig. 22 is a variation of Fig. 21, showing that the balance rope (22) is shortened and instead, each car rope (2a, 2b, 2c) is extended.

[0035] Fig. 23 shows a variation of Fig. 21, in which the balance weight (21) is moved to a position below the middle pulley (17a, 17b, 17c), four balance weight pulleys (23) are installed as movable pulleys on the balance weight (21), and both ends of the balance weight rope (22) are fixed.

[0036] Figure 24 shows that all of the intermediate pulleys (17a, 17b, 17c) shown in Figure 23 have moved to the highest position.

[0037] Fig. 25 shows that among the intermediate pulleys (17a, 17b, 17c) shown in Fig. 23, some of the intermediate pulleys (17b, 17c) are in the highest position, and one intermediate pulley (17a) is in the lowest position.

[0038] Fig. 26 shows that among the intermediate pulleys (17a, 17b, 17c) shown in Fig. 23, one intermediate pulley (17c) is at the highest position, and the other intermediate pulley (17a, 17b) is at the lowest position.

[0039] Figure 27 shows the shape in which the middle pulleys (17a, 17b, 17c) shown in Figure 23 are all in the lowest position.

[0040] Fig. 28 shows the positions of the intermediate pulleys (17a, 17b, 17c) and the balance weight (21) in the case where the four balance weight pulleys (23) installed on the balance weight (21) shown in Figs. 23 to 27 are changed to two, the balance weight rope (22) is connected, and both ends of the balance weight rope (22) are fixed to the balance weight (21).

[0041] Fig. 29 shows a case where the two balance pulleys (23) shown in Fig. 28 are used as is, but the ends of the balance rope (22) are not fixed to the balance weight (21).

[0042] Fig. 30 shows a case where the number of balance pulleys (23) shown in Fig. 23 is changed to five and the balance rope (22) is connected.

[0043] Fig. 31 shows another example of connecting a drive pulley (6a, 6b, 6c), a counterweight (21), and each car (1a, 1b, 1c) with one pulley for each of the cars (1a, 1b, 1c) installed in a single elevator shaft. Car ropes (2a, 2b, 2c), car pulleys (4a, 4b, 4c), drive pulleys (6a, 6b, 6c), counterweights (21), counterweight pulleys (23), counterweight ropes (22), and counterweight-side intermediate pulleys (16a, 16b, 16c) are used.

[0044] Fig. 32 shows an example in which all the middle pulleys (16a, 16b, 16c) on the balance side are in the highest position, and thus the balance weight (21) is also in the highest position, Fig. 33 shows an example in which one middle pulley (16a) is in the lowest position, Fig. 34 shows an example in which two middle pulleys (16a, 16b) are in the lowest position, and Fig. 35 shows an example in which all the middle pulleys (16a, 16b, 16c) are in the lowest position, and thus the balance weight (21) is also in the lowest position.

[0045] Fig. 36 shows an example in which the same number of car-connecting balance weights (21a, 21b, 21c) are used for multiple cars (1a, 1b, 1c) installed in one elevator shaft. Two fixing rods (20a, 20b, 20c) for balance weights are installed for each car-connecting balance weight (21a, 21b, 21c), and two fixing rods (11a, 11b, 11c) for balance weights are installed for each car (1a, 1b, 1c), and the fixing rods (20a, 20b, 20c) for balance weights and the fixing rods (11a, 11b, 11c) for balance weights are each connected to each other by car-connecting balance weight ropes (22a, 22b, 22c).

[0046] The present invention will be described in detail through embodiments of the present invention illustrated in the attached drawings. However, the present invention is not limited to the contents illustrated in the drawings.

[0047] If multiple cars can operate within a single elevator shaft, the allocation of operating sections for each car and the method of operation can be determined by various policies. For example, if in a 30-story building, the first car can move from the 1st to the 28th floor, the second car can move from the 2nd to the 29th floor, and the third car can move from the 3rd to the 30th floor, all three cars can be connected and operated together like a train, or they can depart one car at a time at a time, or they can operate in sections such that the first car runs from the 1st to the 10th floor, the second car runs from the 10th to the 20th floor, and the third car runs from the 20th to the 30th floor. In a train-like operation, if the first car starts from the 1st floor, it may be necessary to decide whether the next floor it can stop at will be the 2nd or the 4th floor. If the cars depart one at a time at a time interval, the third car in the upbound direction could depart from the 3rd floor, the second car could depart from the 2nd floor at a set time interval, and the first car could depart from the 1st floor at a set time interval. The first car in the downbound direction could depart from the 28th floor, the second car could depart from the 29th floor, and the third car could depart from the 30th floor at a set time interval. Generally, the car in front will board waiting passengers first. However, in cases where there are significantly more passengers going in one direction than in the other, such as during rush hour, the car in the back may board waiting passengers first when going in the direction with fewer passengers in order to board more passengers in a short period of time. In any case, the car in the back should not ram the car in front, and should wait if necessary. It cannot stop when there are no passengers waiting in front. The car in front may have to make way for the car behind it if there are passengers.If the first car operates from the 1st to the 10th floor, the second car from the 10th to the 20th floor, and the third car from the 20th to the 30th floor, the 10th and 20th floors can be transfer floors where two cars can operate, and if another car is stopped on the transfer floor, the next car that wants to go to the transfer floor can wait on the previous floor until the stopped car leaves. If the stopped car is waiting on the transfer floor without any passengers, the waiting car can be moved to the next floor and wait, and the next waiting car can be stopped on the transfer floor. The transfer floor can be changed at any time as needed, and this can be mainly set by the software program. The above description does not mean that the number of cars is limited to 3, the building is limited to 30 floors, or the basement floor is excluded. There are no restrictions on the number of floors or the basement floor. The present invention does not deal with the software program part. The present invention deals with enabling multiple cars to operate within a single elevator shaft.

[0048] Fig. 1 shows an example of connecting a balance weight (21) and each car (1a, 1b, 1c) installed in multiple numbers in one elevator shaft. Two balance weight pulleys (23) are installed as movable pulleys on the balance weight (21), and two balance weight rope connection car pulleys (5a, 5b, 5c) are installed on each car (1a, 1b, 1c) for connection to the balance weight rope (22), and the balance weight rope (22) connects the balance weight (21) and all cars (1a, 1b, 1c), and both ends of the balance weight rope (22) are fixed to the balance weight (21). The fixed pulley (19) is installed so that the balance weight ropes (22) do not touch each other in the middle. The positions of each car (1a, 1b, 1c) shown in Fig. 1 are only shown in an expanded form to facilitate understanding and to clearly see the connection relationship of the balance rope (22), and in reality, they are arranged within a single elevator shaft. The positions of each car (1a, 1b, 1c) can be adjusted by adjusting the positions of each fixed pulley (19).

[0049] There is no limitation on the number of cars (1a, 1b, 1c) and the type of balance rope (22).

[0050] In Fig. 1, if we look at the weight of the balance function that one balance weight (21) acts on each car (1a, 1b, 1c), the weight of the balance weight (21) is distributed to the balance rope (22) that is attached six times (also called a section, and will be described as 'attached' hereinafter). Therefore, a weight equivalent to 1 / 6 of the weight of the balance weight (21) acts on the balance rope (22). Since the balance rope (22) is attached twice to each car (1a, 1b, 1c), 2 / 6 of the weight of the balance weight (21) acts on all. Therefore, it is preferable that the weights of the balance weights required for each car (1a, 1b, 1c) are all the same, and the weight of an appropriate balance weight (21) is equal to the sum of the weights of the balance weights required for each car (1a, 1b, 1c). However, as can be seen in the example below, it may vary depending on the method of connecting the balance rope (22), and is not limited thereto.

[0051] Looking at the movement distance of the balance weight (21) in Fig. 1, when one car (1a, 1b, 1c) moves 1 m, the length of the balance weight rope (22) that supports the car (1a, 1b, 1c) changes by 2 m. Since the balance weight rope (22) is attached to the balance weight (21) 6 times, a 2 m change in the length of the balance weight rope (22) causes the balance weight (21) to move by 2 / 6 m. Therefore, in a case like Fig. 1, the balance weight (21) moves 1 / 3 of the distance in the opposite direction for the movement distance of each car (1a, 1b, 1c). When all cars (1a, 1b, 1c) move 1 m in the same direction, the balance weight (21) moves 1 m in the opposite direction.

[0052] In Fig. 1, both ends of the balance rope (22) fixed to the balance weight (21) may not be fixed to the balance weight (21) but may be connected to each other. For example, one balance pulley (23) may be further installed as a movable pulley on the balance weight (21), so that three balance pulleys (23) are installed on the balance weight (21), and both ends of the balance rope (22) are connected to each other through the added balance pulleys (23). In such a case, the balance rope (22) is attached to the balance weight (21) six times.

[0053] In Fig. 1, both ends of the balance rope (22) fixed to the balance weight (21) may be fixed to the floor or the like, rather than to the balance weight (21). In this case, the balance rope (22) is attached to the balance weight (21) four times, and a weight equivalent to 1 / 4 of the weight of the balance weight (21) acts on the balance rope (22), and 2 / 4 of the weight of the balance weight (21) acts equally on each car (1a, 1b, 1c). When one car (1a, 1b, 1c) moves 1 m, the length of the balance rope (22) that supports the car (1a, 1b, 1c) changes by 2 m, and since the balance rope (22) is attached to the balance weight (21) four times, a 2 m change in the length of the balance rope (22) causes the balance weight (21) to move by 2 / 4 m. When all cars (1a, 1b, 1c) move 1m in the same direction, the balance weight (21) moves 6 / 4m in the opposite direction.

[0054] Fig. 2 shows another example of connecting a balance weight (21) and each car (1a, 1b, 1c) installed in multiple numbers in one elevator shaft. The difference from Fig. 1 is that three balance weight pulleys (23) are installed as movable pulleys on the balance weight (21), and both ends of the balance weight rope (22) are not fixed to the balance weight (21), but are fixed to the ceiling of the elevator shaft or a building, etc. The balance weight rope (22) is attached to the balance weight (21) six times.

[0055] In Fig. 2, two balance pulleys (23) may be installed on the balance weight (21) by removing one of the three balance pulleys (23) installed on the balance weight (21). In such a case, the balance rope (22) is attached to the balance weight (21) four times, and a weight equivalent to 1 / 4 of the weight of the balance weight (21) acts on the balance rope (22). The balance rope (22) is attached twice to each car (1a, 1b, 1c), so that 2 / 4 of the weight of the balance weight (21) acts on all of them. When one car (1a, 1b, 1c) moves 1 m, the length of the counterweight rope (22) supporting the car (1a, 1b, 1c) changes by 2 m. Since the counterweight rope (22) is attached to the counterweight (21) four times, the 2 m change in the length of the counterweight rope (22) moves the counterweight (21) by 2 / 4 m. When all cars (1a, 1b, 1c) move 1 m in the same direction, the counterweight (21) moves 6 / 4 m in the opposite direction. Since the counterweight (21) moves a greater distance than the distance all cars (1a, 1b, 1c) move in the same direction, there are limitations in the use of the counterweight (21). Therefore, this form can be used only when the operating section of each car (1a, 1b, 1c) is short compared to the length of the elevator shaft, such as when each car (1a, 1b, 1c) operates in a separate section.

[0056] Fig. 3 shows another example of connecting a counterweight (21) to each of the cars (1a, 1b, 1c) installed in multiple numbers within a single elevator shaft. The difference from Fig. 2 is that one end of the counterweight rope (22) is fixed and the other end is fixed to the counterweight (21), and the counterweight rope (22) is attached to the counterweight (21) seven times. A fixed pulley (19) may also be used.

[0057] The weight of the counterweight (21) of Fig. 3 is distributed to the counterweight ropes (22) attached 7 times. Therefore, a weight equivalent to 1 / 7 of the weight of the counterweight (21) acts on the counterweight ropes (22). Since the counterweight ropes (22) are attached twice to each car (1a, 1b, 1c), 2 / 7 of the weight of the counterweight (21) acts on all of them. When another car (1a, 1b, 1c) moves 1 m, the length of the counterweight rope (22) supporting the car (1a, 1b, 1c) changes by 2 m. Since the counterweight ropes (22) are attached 7 times to the counterweight (21), a 2 m change in the length of the counterweight rope (22) causes the counterweight (21) to move by 2 / 7 m.

[0058] In Fig. 3, one more balance pulley (23) is installed as a movable pulley on the balance weight (21), so that four balance pulleys (23) are installed on the balance weight (21), and one end of the balance rope (22) fixed to the balance weight (21) can be separated, connected to the additionally installed balance pulley (23), and then fixed. In such a case, the balance rope (22) is attached to the balance weight (21) eight times. Accordingly, a weight equivalent to 1 / 8 of the weight of the balance weight (21) acts on the balance rope (22), and 2 / 8 of the weight of the balance weight (21) acts equally on each car (1a, 1b, 1c), and when one car (1a, 1b, 1c) moves 1 m, the balance weight (21) moves 2 / 8 m. The weight of the balance function becomes 2 / 8 of the weight of the balance weight (21), and the movement distance of the balance weight (21) moves 2 / 8 of the distance in the opposite direction to the movement distance of each car (1a, 1b, 1c).

[0059] Fig. 4 shows another example of connecting a counterweight (21) and each car (1a, 1b, 1c) for multiple cars (1a, 1b, 1c) installed in one elevator shaft. The difference from Fig. 1 is that four counterweight pulleys (23) are installed as movable pulleys on the counterweight (21), both ends of the counterweight rope (22) are connected to each other, and the counterweight rope (22) is attached to the counterweight (21) eight times. A fixed pulley (19) may also be used. In this case, the weight of the counterweight function becomes 2 / 8 of the weight of the counterweight (21), and the distance of movement of the counterweight (21) is 2 / 8 in the opposite direction to the distance of movement of each car (1a, 1b, 1c).

[0060] Fig. 5 shows another example of connecting a balance weight (21) and each car (1a, 1b, 1c) for multiple cars (1a, 1b, 1c) installed in one elevator shaft. The difference from Fig. 4 is that five balance weight pulleys (23) are installed as movable pulleys on the balance weight (21), and the balance weight rope (22) is attached to the balance weight (21) 10 times. A fixed pulley (19) may also be used. In this case, the weight of the balance weight function becomes 2 / 10 of the weight of the balance weight (21), and the movement distance of the balance weight (21) moves 2 / 10 of the movement distance in the opposite direction to that of each car (1a, 1b, 1c).

[0061] Fig. 6 shows another example of connecting a balance weight (21) and each car (1a, 1b, 1c) installed in multiple places in one elevator shaft. The difference from Fig. 1 is that three balance weight pulleys (23) are installed as movable pulleys on the balance weight (21), four car pulleys (5a) are installed on one car (1a), and the balance weight rope (22) is attached eight times to the balance weight (21), four times to one car (1a), and twice to the remaining cars (1b, 1c). A fixed pulley (19) may also be used. Accordingly, a weight equal to 1 / 8 of the weight of the balance weight (21) acts on the balance rope (22), 4 / 8 of the weight of the balance weight (21) acts on one car (1a), and 2 / 8 of the weight of the balance weight (21) acts on the other cars (1b, 1c). When one car (1a) moves 1 m, the balance weight (21) moves 4 / 8 m, and when the other cars (1b, 1c) move 1 m, the balance weight (21) moves 2 / 8 m.

[0062] Fig. 7 shows another example of connecting a counterweight (21) and each car (1a, 1b, 1c) for multiple cars (1a, 1b, 1c) installed in one elevator shaft. The difference from Fig. 1 is that three counterweight pulleys (23) are installed as movable pulleys on the counterweight (21), both ends of the counterweight rope (22) are connected to each other, and there are only two counterweight ropes (22) connecting the cars (1a, 1b, 1c) and the counterweight (21). The counterweight ropes (22) are attached to the counterweight (21) six times. In this case, the weight of the counterweight function becomes 2 / 6 of the weight of the counterweight (21), and the distance of movement of the counterweight (21) is 2 / 6 in the opposite direction to the distance of movement of each car (1a, 1b, 1c).

[0063] In Fig. 7, the number of balance pulleys (23) can be easily changed, and when the number of balance pulleys (23) is increased, the weight of the balance function that the weight of the balance weight (21) acts on each car (1a, 1b, 1c) decreases, and the movement distance of the balance weight (21) with respect to the movement distance of each car (1a, 1b, 1c) decreases, and when the number of balance pulleys (23) is decreased, the weight of the balance function that the weight of the balance weight (21) acts on each car (1a, 1b, 1c) increases, and the movement distance of the balance weight (21) with respect to the movement distance of each car (1a, 1b, 1c) increases. For example, if the number of balance pulleys (23) is 1, the weight of the balance function acting on each car (1a, 1b, 1c) becomes equal to the weight of the balance weight (21), and the movement distance of the balance weight (21) becomes equal to the movement distance of each car (1a, 1b, 1c). If all cars (1a, 1b, 1c) move 1 m in the same direction, the balance weight (21) moves 3 m in the opposite direction. Since the balance weight (21) moves a greater distance than the distance all cars (1a, 1b, 1c) move in the same direction, there are restrictions on the use of the balance weight (21). Therefore, this form can only be used when the operation section of each car (1a, 1b, 1c) is short compared to the length of the elevator shaft, such as when each car (1a, 1b, 1c) operates in a divided section.

[0064] In FIGS. 4 to 6, all the cars (1a, 1b, 1c) are provided with car pulleys (5a, 5b, 5c), but this is not limited thereto. Instead of two car pulleys (5a, 5b, 5c) connected by a balance rope (22), one of the cars (1a, 1b, 1c) may be provided with two fixed rods (12a, 12b, 12c) as shown in FIG. 8, and both ends of the balance rope (22) may be respectively fixed to the installed fixed rods (12a, 12b, 12c).

[0065] Here, the fixed rods (12a, 12b, 12c) are objects that support each car (1a, 1b, 1c) by protruding outward from the edge of each car (1a, 1b, 1c). They may be attached and installed in the form of a rod or the like, or may be protruding portions from each car (1a, 1b, 1c). This also applies to the car connecting balance weights (21a, 21b, 21c). Hereinafter, such objects or protruding portions from each car (1a, 1b, 1c) or the car connecting balance weights (21a, 21b, 21c) will be referred to as 'fixed rods'.

[0066] In Fig. 7, the method of connecting the balance rope (22) can be changed in various ways. For example, in Fig. 7, the middle part of the balance rope (22) connected from the fixed pulley (19) above the balance rope (21) to the fixed pulley (19) above the car (1a) to which the balance rope (22) is connected can be cut and both ends fixed.

[0067] For another example, one counterweight pulley (23) can be separated from the counterweight (21) and the separated counterweight pulley (23) can be fixed to the floor, or in addition, the counterweight pulley (23) fixed to the floor can be removed and the counterweight rope (22) can be pulled from there and fixed to the floor. In this case, the counterweight rope (22) is attached to the counterweight (21) four times. At this time, the weight of the counterweight function becomes 2 / 4 of the weight of the counterweight (21), and the counterweight (21) moves 2 / 4 of the distance in the opposite direction relative to the movement distance of each car (1a, 1b, 1c). In this case, if all cars (1a, 1b, 1c) move 1m in the same direction, the counterweight (21) moves 6 / 4m in the opposite direction, so the movement distance of the counterweight (21) becomes greater than the simultaneous movement distance of all cars (1b, 1b, 1c) in the same direction.

[0068] Through the above explanation, it can be sufficiently understood that various changes are possible in the connection of the balance rope (22), and an appropriate connection method can be used as needed.

[0069] Figures 1 to 7 illustrate examples of connecting a balance weight (21) and each car (1a, 1b, 1c). The actual location of each car (1a, 1b, 1c) is within one elevator shaft, and they are arranged so as not to collide with each other vertically within the elevator shaft. A method for preventing the balance weight ropes (22) from touching each other in the middle is also described together with the description of Figure 11 below.

[0070] Fig. 8 shows another example of connecting a balance weight (21) and each car (1a, 1b, 1c) installed in multiple places in one elevator shaft. In the balance weight (21), two balance weight pulleys (23) are installed as movable pulleys, both ends of the balance weight rope (22) are fixed to the balance weight (21), and the balance weight rope (22) connects three intermediate pulleys (18a, 18b, 18c) each having three pulleys and the balance weight pulley (23), and in the first car (1a), two fixed rods (12a) are installed, and both ends of the car rope (3a) for connecting the balance weight rope connecting the car (1a) and the balance weight rope (22) are fixed to the two fixed rods (12a), and the car rope (3a) connected to the fixed pulley (19) is connected to two pulleys in the intermediate pulley (18a), and in the second car (1b), two fixed rods (12b) are installed, and connect the car (1b) and the balance weight rope (22). One end of a car rope (3b) for connecting two counterweight ropes is fixed to two fixed bars (12b), and the other ends of the two car ropes (3b) are respectively connected to two pulleys in the middle pulley (18b), and two car pulleys (5c) are installed in the third car (1c), and both ends of the car rope (3c) for connecting the counterweight ropes connecting the car (1c) and the counterweight rope (22) are respectively fixed, and the car ropes (3c) connected to the two car pulleys (5c) are respectively connected to two pulleys in the middle pulley (18c).

[0071] The connection method of each car rope (3a, 3b, 3c) connected to each car (1a, 1b, 1c) is different. This is to introduce various methods with different advantages and disadvantages, and is not intended to indicate any limitations. There are no limitations.

[0072] The fixed pulley (19) is installed so that the balance rope (22) and the car ropes (3a, 3b, 3c) do not touch each other in the middle. The positions of each car (1a, 1b, 1c) shown in Fig. 8 are only shown in an expanded form to clearly show the connection relationship of the car ropes (3a, 3b, 3c) and to help understanding, and in reality, they are arranged in one elevator shaft. The positions of each car (1a, 1b, 1c) can be adjusted by adjusting the positions of each fixed pulley (19).

[0073] There is no limitation on the number of car (1a, 1b, 1c), the type of balance rope (22), and the car rope (3a, 3b, 3c).

[0074] Looking at the weight of the balance function that one balance weight (21) acts on each car (1a, 1b, 1c) in Fig. 8, the weight of the balance weight (21) is distributed to the balance weight rope (22) attached six times. Therefore, a weight equivalent to 1 / 6 of the weight of the balance weight (21) acts on the balance weight rope (22). The balance weight rope (22) is attached twice to each intermediate pulley (18a, 18b, 18c), and each car rope (3a, 3b, 3c) is attached four times. Therefore, a weight equivalent to 2 / 6 of the weight of the balance weight (21) acts on the middle pulleys (18a, 18b, 18c), and since the car ropes (3a, 3b, 3c) are attached twice to each car (1a, 1b, 1c), 1 / 6 of the weight of the balance weight (21) acts on each car (1a, 1b, 1c). Therefore, it is preferable that the weights of the balance weights required for each car (1a, 1b, 1c) are all the same, and the weight of an appropriate balance weight (21) is twice the sum of the weights of the balance weights required for each car (1a, 1b, 1c). However, it is not limited to that.

[0075] Looking at the movement distance of the balance weight (21) in Fig. 8, when one car (1a, 1b, 1c) moves 1 m, the intermediate pulley (18a, 18b, 18c) supporting the car (1a, 1b, 1c) moves 1 / 2 m in the opposite direction. Then, the length of the connected balance weight rope (22) changes by 1 m, and since the balance weight rope (22) is attached to the balance weight (21) 6 times, a 1 m change in the length of the balance weight rope (22) moves the balance weight (21) 1 / 6 m. Therefore, in a case like Fig. 8, the balance weight (21) moves 1 / 6 the distance in the opposite direction for the movement distance of each car (1a, 1b, 1c). When all cars (1a, 1b, 1c) move 1 m in the same direction, the balance weight (21) moves 3 / 6 m in the opposite direction. However, in Fig. 8, when each car (1a, 1b, 1c) moves 1 m, the intermediate pulleys (18a, 18b, 18c) together with the balance weight (21) also move 1 / 2 m. Therefore, since the length of the elevator shaft is shared between the intermediate pulleys (18a, 18b, 18c) and the balance weight (21), the travel distance of the cars (1a, 1b, 1c) may also be limited. This will be analyzed in detail in Figs. 15 to 19.

[0076] Fig. 9 shows another example of connecting a balance weight (21) and each car (1a, 1b, 1c) installed in multiple places in one elevator shaft. In the balance weight (21), two balance weight pulleys (23) are installed as movable pulleys, both ends of the balance weight rope (22) are fixed to the balance weight (21), the balance weight rope (22) connects two balance weight side intermediate pulleys (16b, 16c) and an intermediate pulley (17a) having two pulleys and the balance weight pulley (23), and in the first car (1a), two fixed rods (12a) are installed, both ends of the car rope (3a) are fixed to the two fixed rods (12a), respectively, and the car rope (3a) is connected to the intermediate pulley (17a), and in the second car (1b), two fixed rods (12b) are installed, one end of the two car ropes (3b) is fixed to the two fixed rods (12b), respectively, and the other end is fixed to the intermediate pulley (16b), and in the third car (1c), Two car pulleys (5c) are installed, and both ends of the car rope (3c) connected to the two car pulleys (5c) are fixed to the middle pulley (16c).

[0077] The fixed pulley (19) is installed so that the balance rope (22) and the car ropes (3a, 3b, 3c) do not touch each other in the middle. The positions of each car (1a, 1b, 1c) shown in Fig. 9 are only shown in an expanded form to clearly show the connection relationship of the car ropes (3a, 3b, 3c) and to help understanding, and in reality, they are arranged in one elevator shaft. The positions of each car (1a, 1b, 1c) can be adjusted by adjusting the positions of each fixed pulley (19).

[0078] There is no limitation on the number of car (1a, 1b, 1c), the type of balance rope (22), and the car rope (3a, 3b, 3c).

[0079] Looking at the weight of the balance function that one balance weight (21) exerts on each car (1a, 1b, 1c) in Fig. 9, the weight of the balance weight (21) is distributed to the balance weight rope (22) attached six times. Therefore, a weight equivalent to 1 / 6 of the weight of the balance weight (21) acts on the balance weight rope (22). The balance weight rope (22) is attached twice to each intermediate pulley (16b, 16c, 17a), and each car rope (3a, 3b, 3c) is also attached twice. Therefore, a weight equivalent to 2 / 6 of the weight of the balance weight (21) acts on each intermediate pulley (16b, 16c, 17a), and since each car (1a, 1b, 1c) has two car ropes (3a, 3b, 3c), 2 / 6 of the weight of the balance weight (21) acts on each car (1a, 1b, 1c). Therefore, it is preferable that the weights of the balance weights required for each car (1a, 1b, 1c) are all the same, and the weight of an appropriate balance weight (21) is equal to the sum of the weights of the balance weights required for each car (1a, 1b, 1c). However, it is not limited thereto.

[0080] Looking at the movement distance of the balance weight (21) in Fig. 9, when one car (1a, 1b, 1c) moves 1 m, the intermediate pulley (16b, 16c, 17a) supporting the car (1a, 1b, 1c) moves 1 m in the opposite direction. Then, the length of the connected balance weight rope (22) changes by 2 m, and since the balance weight rope (22) is attached to the balance weight (21) 6 times, a 2 m change in the length of the balance weight rope (22) causes the balance weight (21) to move 2 / 6 m. Therefore, in a case like Fig. 9, the balance weight (21) moves 1 / 3 of the distance in the opposite direction for the movement distance of each car (1a, 1b, 1c). When all cars (1a, 1b, 1c) move 1 m in the same direction, the balance weight (21) moves 1 m in the opposite direction. However, in Fig. 9, when each car (1a, 1b, 1c) moves 1 m, the intermediate pulleys (16b, 16c, 17a) along with the balance weight (21) also move 1 m. Therefore, the length of the elevator shaft is shared between the intermediate pulleys (16b, 16c, 17a) and the balance weight (21), which places greater restrictions on the travel distance of the cars (1a, 1b, 1c) compared to the example shown in Fig. 8.

[0081] Fig. 10 shows an example of a driving device that can be used in the cars (1a, 1b, 1c) shown in Figs. 1 to 9. For one car (1a), two drive pulley connecting car pulleys (4a) for connecting to a drive pulley (6a) having one pulley connected to a traction machine or the like to drive the car (1a) are installed on the car (1a), and it can be seen that the car pulley (4a) and the drive pulley (6a) are connected using a drive pulley connecting car rope (2a) that connects the car pulley (4a) and the drive pulley (6a). One end of the car rope (2a) is fixed. The other end of the car rope (2a) may be wound around the drive pulley (6a), may pass through the drive pulley (6a) and hang to one side, or may be wound around a separate wheel such as a rope winding drum, depending on the characteristics of the drive pulley (6a).

[0082] In Fig. 10, the driving pulley (6a) may be replaced with a driving pulley (7a) having two pulleys and connected to a winding machine, such as that shown in Fig. 15, and the two ends of the car rope (2a) may be respectively connected to the two pulleys of the driving pulley (7a). A fixed pulley (19) may also be used. In addition, the car pulley (4a) for connecting the two driving pulleys may be replaced with a fixed bar (13a) as shown in Fig. 12, and the two ends of the car rope (2a) may respectively be fixed to the two fixed bars (13a).

[0083] The fixed pulley (19), the driving pulley (6a), the driving pulley (7a), the car pulley (4a), and the fixed rod (13a) are installed so that the car rope (2a) does not touch each other in the middle.

[0084] From the above explanation, it can be sufficiently seen that various changes are possible in the connection of the car rope (2a).

[0085] The drive pulley (6a) can be connected to a winding machine or the like in practice, and the winding machine can include an electric motor.

[0086] Depending on the rotation direction of the drive pulley (6a), the car (1a) can be raised or lowered.

[0087] The driving device for one car (1a) shown in Fig. 10 can operate independently of the devices installed to connect the balance weight to one car (1a) shown in Figs. 1 to 9 without being directly connected to each other.

[0088] The above example and explanation for one car (1a) shown in FIGS. 1 to 9 may be applied in the same manner to the other cars (1b, 1c) so that two car pulleys (4b, 4c) are installed in each car (1b, 1c), and a drive pulley (6b, 6c) having one pulley connected to each car pulley (4b, 4c) and each winding machine, etc., may be connected using a car rope (2b, 2c) for connecting the drive pulleys.

[0089] Fig. 11 shows a part of a balance rope (22) connected to a balance weight (21) shown in Figs. 1 to 7 for a car (1a) integrated with a part of a drive device shown in Fig. 10. A fixed pulley (19) is installed so that the balance rope (22) and the car rope (2a) do not touch each other in the middle.

[0090] In the same manner, for the other cars (1b, 1c) shown in FIGS. 1 to 7, the part related to the balance rope (22) connected to the balance weight (21) shown in FIGS. 1 to 7 and the part of the drive device shown in FIG. 10 can be integrated.

[0091] There is no limitation on the number of cars (1a, 1b, 1c), the type of car ropes (2a, 2b, 2c), and the type of balance rope (22).

[0092] When the above-described installation is completed for each of the cars (1a, 1b, 1c) shown in FIGS. 1 to 7, half of the weight of the car (1a) minus the weight of the counterweight function acted upon by the counterweight rope (22) is applied to the driving pulley (6a) and the car rope (2a) each having one pulley. In the case of the other cars (1b, 1c), half of the weight of the car (1b, 1c) minus the weight of the counterweight function acted upon by the counterweight rope (22) is applied to the driving pulleys (6b, 6c) each having one pulley and the car ropes (2b, 2c).

[0093] In Fig. 11, on the upper side of the car (1a), there are eight imaginary radial straight lines drawn in the form of dotted lines at different angles from the central vertical line of the car (1a), and it can be seen that one car pulley (4a) for connecting a drive pulley is installed at each of the two ends of one of the radial straight lines, and one car pulley (5a) for connecting a counterweight rope is installed at each of the two ends of the other radial straight line. It is preferable that the car pulley (4a) for connecting a drive pulley and the car pulley (5a) for connecting a counterweight rope are installed at different heights. The drive pulley connecting car pulley (4a) and the counterweight rope connecting car pulley (5a), which are installed on virtual radial straight lines in different directions, can create the same effect as connecting the car rope (2a) and the counterweight rope (22) to the center of the car (1a), respectively, and prevent the car rope (2a) and the counterweight rope (22) from touching each other. In addition, by selecting the positions of the drive pulley connecting car pulley (4a), the counterweight rope connecting car pulley (5a), the drive pulley (6a), and the fixed pulley (19) slightly off the edge of the car (1a), the car rope (2a) and the counterweight rope (22) are prevented from touching not only the car (1a) to which they are directly connected, but also other cars (1b, 1c) in the same hoistway.

[0094] In the same way, for other cars (1b, 1c) not shown in Fig. 11, car rope connecting car pulleys (4b, 4c), car rope connecting car pulleys (5b, 5c), driving pulleys (6b, 6c), and fixed pulleys (19) can be installed to prevent the car ropes (2b, 2c) and the counterweight rope (22) from touching each other and other cars (1a, 1b, 1c).

[0095] Through the above description of Fig. 11, it will be easily understood that a part related to the car rope (3a) shown in Figs. 8 to 9 and a part of the driving device shown in Fig. 10 are integrated into one car (1a).

[0096] Fig. 12 shows another example of a drive device that can be used in the cars (1a, 1b, 1c) shown in Figs. 1 to 9. For one car (1a), a fixed rod (13a), a car pulley (4a) for connecting a drive pulley, and a drive pulley (6a) having one pulley are installed on the car (1a), and it can be seen that the car pulley (4a) and the drive pulley (6a) are connected using a car rope (2a). One end of the car rope (2a) is fixed to the fixed rod (13a) fixed to the car (1a), and the other end may be wound around the drive pulley (6a), or may be hung to one side past the drive pulley (6a), or may be wound around a separate wheel such as a rope winding drum, depending on the characteristics of the drive pulley (6a).

[0097] In Fig. 12, the drive pulley (6a) may be replaced with a drive pulley (7a) having two pulleys as shown in Fig. 15, and the two ends of the car rope (2a) may be connected to the two pulleys of the drive pulley (7a) having two pulleys, respectively. To do so, the fixed bar (13a) would have to be replaced with a car pulley (4a) for connecting the drive pulleys. In addition, the two fixed pulleys (19) shown above may be removed, the car rope (2a) may be cut in the middle, and its two ends may be fixed.

[0098] The fixed pulley (19), the car pulley (4a), and the fixed rod (13a) are installed so that the car rope (2a) does not touch each other in the middle.

[0099] From the above explanation, it can be sufficiently seen that various changes are possible in the connection of the car rope (2a).

[0100] The drive pulley (6a) can be connected to a winding machine or the like in practice, and the winding machine can include an electric motor.

[0101] Depending on the rotation direction of the drive pulley (6a), the car (1a) can be raised or lowered.

[0102] The driving device for the car (1a) shown in Fig. 12 can operate independently of the devices installed to connect the balance weight to the car (1a) shown in Figs. 1 to 9 without being directly connected to each other.

[0103] The above examples and descriptions for one car (1a) shown in FIGS. 1 to 9 can be applied in the same manner to the other cars (1b, 1c) so that a fixed rod (13b, 13c), a car pulley (4b, 4c), and a drive pulley (6b, 6c) having one pulley are installed in each car (1b, 1c), and the car pulleys (4b, 4c) and the drive pulleys (6b, 6c) can be connected using car ropes (2b, 2c), respectively.

[0104] Fig. 13 shows a part of a balance rope (22) connected to a balance weight (21) shown in Figs. 1 to 7 for a car (1a) integrated with a part of a drive device shown in Fig. 12. The fixed pulley (19) and the fixed rod (13a) are installed so that the balance rope (22) and the car rope (2a) do not touch each other in the middle.

[0105] In the same manner, for the other cars (1b, 1c) shown in FIGS. 1 to 7, the part related to the balance rope (22) connected to the balance weight (21) shown in FIGS. 1 to 7 and the part of the drive device shown in FIG. 12 can be integrated.

[0106] There is no limitation on the number of cars (1a, 1b, 1c), types of car ropes (2a, 2b, 2c) and balance ropes (22).

[0107] When the above-described installation is completed for each of the cars (1a, 1b, 1c) shown in FIGS. 1 to 7, half of the weight of the car (1a) minus the weight of the counterweight function acted upon by the counterweight rope (22) is applied to the driving pulley (6a) and the car rope (2a) each having one pulley. In the case of the other cars (1b, 1c), half of the weight of the car (1b, 1c) minus the weight of the counterweight function acted upon by the counterweight rope (22) is applied to the driving pulleys (6b, 6c) each having one pulley and the car ropes (2b, 2c).

[0108] In the same way, for other cars (1b, 1c) not shown in Fig. 13, car rope connecting car pulleys (4b, 4c), counterweight rope connecting car pulleys (5b, 5c), fixed rods (13b, 13c), driving pulleys (6b, 6c), and fixed pulleys (19) can be installed to prevent the car ropes (2b, 2c) and counterweight ropes (22) from touching each other and other cars (1a, 1b, 1c).

[0109] Through the above description of Fig. 13, it will be easily understood that a part related to the car rope (3a) shown in Figs. 8 and 9 and a part of the driving device shown in Fig. 12 are integrated into one car (1a).

[0110] Fig. 14 shows another example of a drive device that can be used in the cars (1a, 1b, 1c) shown in Figs. 1 to 7. This drive device is characterized by including a differential device (9a). It can be seen that for one car (1a), a portion related to a counterweight rope (22) connected to a counterweight (21) shown in Figs. 1 to 7 and a portion of the drive device including the differential device (9a) are integrated. For one car (1a), a differential device (9a) and two drive pulleys (8a) connected to both sides of the differential device are further used, the two drive pulleys (8a) being respectively connected to the counterweight ropes (22) on both sides, and the two drive pulleys (8a) being respectively connected to the shafts on both sides of the differential device (9a). The fixed pulley (19) and the drive pulley (8a) are installed so that the counterweight ropes (22) do not touch each other in the middle.

[0111] In the same manner, other cars (1b, 1c) shown in FIGS. 1 to 7 can be configured like the car (1a) shown in FIG. 14 by further using differential devices (9b, 9c) and drive pulleys (8b, 8c) connected to the differential devices.

[0112] There is no limitation on the number of cars (1a, 1b, 1c) or the type of balance rope (22). An open differential is preferred for the differential device (9a), but there is no limitation.

[0113] The differential device (9a) receives power through the drive shaft (10a) of the differential device (9a). The drive shaft (10a) of the differential device (9a) may be connected to a winding machine or the like in practice. The winding machine may include an electric motor.

[0114] When examining the operation of the car (1a) and the balance weight (21) due to the use of the differential device (9a), even when the drive shaft (10a) of the differential device (9a) is stopped, the drive pulleys (8a) on both sides can rotate by the same angle in opposite directions, so that the balance rope (22) can move freely while the car (1a) is stopped, and when the drive shaft (10a) of the differential device (9a) is rotated, additional rotation occurs in the drive pulleys (8a) on both sides, allowing the car (1a) to move.

[0115] Depending on the rotation direction of the drive shaft (10a) of the differential device (9a), the car (1a) can be raised or lowered.

[0116] The weight of the counterweight function acting through the counterweight rope (22) acts on the drive pulleys (8a) on both sides.

[0117] When the above-described installation is completed for each of the cars (1a, 1b, 1c) shown in FIGS. 1 to 7, the weight of one car (1a) acts on the connected balance rope (22), and the balance rope (22) is connected to the drive pulleys (8a) on both sides, and the balance rope (22) connected to the drive pulley (8a) is pulled by the weight of the balance function by the balance weight (21). Therefore, the weight of the car (1a) minus the weight of the balance function acts on the drive shaft (10a) of the differential device (9a) connected to the drive pulley (8a). In the case of other cars (1b, 1c), the weight of each car (1b, 1c) acts on the connected balance rope (22), and the balance rope (22) is connected to each driving pulley (8b, 8c), and the weight of the balance function by the balance weight (21) acts and is pulled, so that the weight of each car (1b, 1c) minus the weight of the balance function acts on the driving shaft (10b, 10c) of the differential device (9b, 9c) connected to each driving pulley (8b, 8c).

[0118] Fig. 15 shows another example in which the balance weight (21), the balance weight rope (22), the balance weight pulley (23), the intermediate pulleys (18a, 18b, 18c), the car ropes (3a, 3b, 3c), the fixed rods (12a, 12b), the car pulleys (5c), and the drive pulleys (7a, 7b, 7c) each having two pulleys capable of driving the respective cars (1a, 1b, 1c) are connected to the cars (1a, 1b, 1c). Two pulleys of one drive pulley (7a, 7b, 7c) are connected to each car rope (3a, 3b, 3c) connected to one car (1a, 1b, 1c). The two pulleys of the driving pulleys (7a, 7b, 7c) are fixed to the shaft and always rotate together. Since the car ropes (3a, 3b, 3c) are each connected to the balance rope (22) through the intermediate pulleys (18a, 18b, 18c), when the driving pulleys (7a, 7b, 7c) drive the connected cars (1a, 1b, 1c), a part of the weight of the balance rope (21) acts as the weight of the balance function for each car (1a, 1b, 1c).

[0119] It will be seen from the above description that drive pulleys (7a, 7b, 7c) each having two pulleys capable of driving each car (1a, 1b, 1c) can be connected in the same manner as shown in Fig. 9.

[0120] A weight acting on one drive pulley (7a, 7b, 7c) is the weight of the car (1a, 1b, 1c) minus the weight of the counterweight function acting on the car rope (3a, 3b, 3c).

[0121] The fixed pulley (19) and the driving pulley (7a, 7b, 7c) are installed so that the balance rope (22) and the car rope (3a, 3b, 3c) do not touch each other in the middle.

[0122] Each connected car (1a, 1b, 1c) moves up or down according to the rotation of the drive pulley (7a, 7b, 7c).

[0123] The positions of each car (1a, 1b, 1c) shown in Fig. 15 are only shown in an expanded manner to facilitate understanding and to clearly see the connection relationship of the car ropes (3a, 3b, 3c), and in reality, they are arranged within a single elevator shaft. The positions of each car (1a, 1b, 1c) can be adjusted by adjusting the positions of each fixed pulley (19).

[0124] There is no limitation on the number of cars (1a, 1b, 1c) or the type of balance rope (22).

[0125] The drive pulleys (7a, 7b, 7c) can be connected to a traction machine or the like in practice. The traction machine can include an electric motor.

[0126] Fig. 15 shows an example of connecting a balance weight (21) and each car (1a, 1b, 1c). The actual location of each car (1a, 1b, 1c) is within one elevator shaft, and they are arranged so as not to collide with each other vertically within the elevator shaft.

[0127] When all the cars (1a, 1b, 1c) of Fig. 15 move 1 m in the same direction at the same time, all the intermediate pulleys (18a, 18b, 18c) move 1 / 2 m, and the balance weight (21) also moves 1 / 2 m, so it becomes necessary to analyze the movement distance of the intermediate pulleys (18a, 18b, 18c) and the movement distance of the balance weight (21) together.

[0128] Through the analysis of FIGS. 16 to 19, the required length of the counterweight rope (22) shown in FIG. 15 can be determined. It is assumed that each car (1a, 1b, 1c) runs from the top to the bottom of the elevator shaft or runs in sections of a certain distance, and that the running distances are equal. The counterweight rope (22) must ensure the movement of each car (1a, 1b, 1c) from the upper end to the lower end of the section in which each car (1a, 1b, 1c) runs. In FIG. 16, the intermediate pulleys (18a, 18b, 18c) are all at the upper end, and in FIG. 19, the intermediate pulleys (18a, 18b, 18c) are all at the lower end, spaced apart by half the running distance of each car (1a, 1b, 1c). In Fig. 17, one intermediate pulley (18a) is at the lower end, and in Fig. 18, two intermediate pulleys (18a, 18b) are at the lower ends. In Fig. 17, the minimum allowable length of the balance rope (22) can be easily confirmed, because the length of the balance rope (22) cannot be shorter than the length of the balance rope (22) shown in Fig. 17. That is why in Fig. 16, the balance (21) is not close to the upper end, but is spaced apart by about 2 / 6 of the travel distance of the cars (1a, 1b, 1c). If the length of the balance rope (22) is added from left to right in Fig. 16, it is equal to 2 / 6 X 6 = 12 / 6, and if calculated in the same way in Fig. 17, it is equal to 1 / 2 X 4 = 2. Therefore, 5 / 6 must be considered by adding the distance 2 / 6 that must be spaced apart and 1 / 2 the travel distance of the balance rope (21). That is, the operating distance of the car Х 5 / 6 = the length of the elevator shaft can limit the operating distance of the car.

[0129] Fig. 20 shows another example of connecting a driving pulley (6a, 6b, 6c) having one pulley each, a balance weight (21), and each car (1a, 1b, 1c) installed in multiple numbers in one elevator shaft. Car ropes (2a, 2b, 2c), car pulleys (4a, 4b, 4c), drive pulleys (6a, 6b, 6c), a counterweight (21), a counterweight pulley (23), and a counterweight rope (22) are used, and three car ropes (2a, 2b, 2c) with both ends fixed to three cars (1a, 1b, 1c) are respectively connected to the car pulleys (4a, 4b, 4c), drive pulleys (6a, 6b, 6c), and car-side intermediate pulleys (15a, 15b, 15c), and also, as shown in FIG. 1, the counterweight rope (22) connected to the counterweight (21) is connected to the counterweight-side intermediate pulleys (16a, 16b, 16c), and the car-side intermediate pulleys (15a, 15b, 15c) and the intermediate pulleys (16a, 16b, 16c) on the balance side are respectively connected via intermediate ropes (14a, 14b, 14c). Accordingly, when the connected car (1a, 1b, 1c) is driven by the driving pulleys (6a, 6b, 6c), a portion of the weight of the balance weight (21) acts as the weight of the balance weight function for each car (1a, 1b, 1c). The fixed pulley (19) is installed so that the car ropes (2a, 2b, 2c), the intermediate ropes (14a, 14b, 14c), and the balance weight rope (22) do not touch each other in the middle. The positions of each car (1a, 1b, 1c) shown in FIG. 20 are only shown in an expanded form to clearly show the connection relationship of the balance weight rope (22) and to help understanding, and in reality, they are arranged within one hoistway. The position of each car (1a, 1b, 1c) can be adjusted by adjusting the position of each fixed pulley (19).

[0130] There is no limitation on the number of cars (1a, 1b, 1c), the type of car ropes (2a, 2b, 2c), the type of intermediate ropes (14a, 14b, 14c), and the type of balance rope (22).

[0131] Looking at the weight of the balance function in which the weight of one balance weight (21) acts on each car (1a, 1b, 1c) in FIG. 20, the weight of the balance weight (21) is distributed to the balance weight ropes (22) attached six times. Therefore, the weight equivalent to 1 / 6 of the balance weight (21) acts on the balance weight ropes (22). The balance weight ropes (22) are attached twice to each of the intermediate ropes (14a, 14b, 14c) through the intermediate pulleys (16a, 16b, 16c) on the balance weight side, so that 2 / 6 of the weight of the balance weight (21) acts. Each car rope (2a, 2b, 2c) is connected to the intermediate rope (14a, 14b, 14c) through the car-side intermediate pulley (15a, 15b, 15c), and each car rope (2a, 2b, 2c) is attached twice to each car-side intermediate pulley (15a, 15b, 15c), so that 1 / 6 of the weight of the counterweight (21) acts on each car rope (2a, 2b, 2c). Each car (1a, 1b, 1c) has the car rope (2a, 2b, 2c) attached twice through two car pulleys (4a, 4b, 4c), so that 2 / 6 of the weight of the counterweight (21) acts on each car (1a, 1b, 1c) as the weight of the counterweight function. Half of the weight of the car (1a, 1b, 1c) excluding the weight of the counterweight function acting by the counterweight rope (22) is applied to one drive pulley (6a, 6b, 6c).

[0132] When one car (1a, 1b, 1c) moves 1 m, the length of the car rope (2a, 2b, 2c) that hangs the car (1a, 1b, 1c) changes by 2 m, and this 2 m change in the length of the car rope (2a, 2b, 2c) moves the connected car-side intermediate pulley (15a, 15b, 15c) by 1 m. When the car-side intermediate pulley (15a, 15b, 15c) moves 1 m, the counterweight-side intermediate pulley (16a, 16b, 16c) connected to it via the intermediate rope (14a, 14b, 14c) also moves by 1 m, and this causes a 2 m change in the length of the counterweight rope (22) that hangs the counterweight (21) and moves the counterweight (21) by 2 / 6 m. Accordingly, in a case such as Fig. 20, the balance weight (21) moves 1 / 3 of the distance in the opposite direction for the movement distance of each car (1a, 1b, 1c). If all cars (1a, 1b, 1c) move 1 m in the same direction, the balance weight (21) moves 1 m in the opposite direction. In view of this, there is no need to worry about the maximum movement distance of the balance weight (21).

[0133] The car ropes (2a, 2b, 2c) shown in Fig. 20 may each have their ends connected to each other.

[0134] The method of connecting the balance weight (21), the balance weight rope (22), and the balance weight pulley (23) shown in Fig. 20 is the same as the method shown in Fig. 1, but this method can be changed to various methods described in addition to the various drawings shown in Figs. 2 to 6 and the above description.

[0135] Also, in Fig. 20, the car (1c), the car rope (2c), the car pulley (4c), the driving pulley (6c) with one pulley, and the intermediate pulley (15c) for connecting the car rope may be removed, and one end of the intermediate rope (14c) may be connected together with one of the intermediate pulleys (15a, 15b) on the car side to which another intermediate rope (14a, 14b) is connected. With this change, the car (1a, 1b) to which one more intermediate rope (14c) is connected receives a force equal to the weight of the counterweight (21) twice that of the other car (1b, 1a) from the counterweight (21). This change may allow one car (1a, 1b) to be used for a special purpose, such as a cargo car.

[0136] From the above explanation, it can be seen that there are various variations possible in the connection of the balance rope (22).

[0137] Fig. 20 shows an example of connecting a balance weight (21) and each car (1a, 1b, 1c). The actual location of each car (1a, 1b, 1c) is within one elevator shaft, and they are arranged so as not to collide with each other vertically within the elevator shaft. The method of preventing the car ropes (2a, 2b, 2c) from touching each other in the middle can be understood from the description of Fig. 11 above.

[0138] Fig. 21 is a variation of Fig. 20, in which the intermediate ropes (14a, 14b, 14c) shown in Fig. 20 are eliminated, the car-side intermediate pulleys (15a, 15b, 15c) and the counterweight-side intermediate pulleys (16a, 16b, 16c) are each integrated to form intermediate pulleys (17a, 17b, 17c) each having two pulleys, and the counterweight rope (22) is shown as an example extended longer.

[0139] The detailed operation of the example shown in Fig. 21 can be understood through the description of Fig. 20 above.

[0140] Fig. 22 is a variation of Fig. 21, showing that the balance rope (22) is shortened and instead, each car rope (2a, 2b, 2c) is extended.

[0141] The detailed operation of the example shown in Fig. 22 can be understood through the description of Fig. 20 above.

[0142] Fig. 23 is a variation of Fig. 21, showing an example in which the balance weight (21) is moved to a position below the intermediate pulleys (17a, 17b, 17c) and the method of connecting the balance weight rope (22) is changed. In Fig. 23, unlike Fig. 21, four balance weight pulleys (23) are installed as movable pulleys on the balance weight (21), and both ends of the balance weight rope (22) are fixed.

[0143] When the balance weight (21) is positioned below the intermediate pulleys (17a, 17b, 17c), a problem that was not considered in FIGS. 20 to 22 arises. In FIG. 21, when all the cars (1a, 1b, 1c) move from the bottom to the top of the elevator shaft, all the intermediate pulleys (17a, 17b, 17c) can move from the top to the bottom of the elevator shaft, and the balance weight (21) can also move from the top to the bottom. However, in FIG. 23, when all the cars (1a, 1b, 1c) move from the bottom to the top of the hoistway, all the intermediate pulleys (17a, 17b, 17c) can move from the top to the bottom of the hoistway, but if the balance weight (21), two balance weight pulleys (23), and the balance weight rope (22) shown in FIG. 21 were moved to a position below the intermediate pulleys (17a, 17b, 17c) in the same connection method, when the intermediate pulleys (17a, 17b, 17c) move to the bottom of the hoistway, the balance weight (21) will have nowhere else to go on the floor inside the hoistway. In other words, there are restrictions on the use of the balance weight (21) and the balance weight rope (22) below the intermediate pulleys (17a, 17b, 17c).

[0144] In Fig. 23, if the connection of the balance weight (21) and the balance rope (22) using the two balance weight pulleys (23) shown in Fig. 21 is used as is, and if all the cars (1a, 1b, 1c) move 1 m in the same direction, even if the balance weight (21) moves 1 m, the intermediate pulleys (17a, 17b, 17c) move 1 m, so the entire length of the hoistway must be shared by the intermediate pulleys (17a, 17b, 17c) and the balance weight (21). Therefore, a form such as Fig. 23 can be used only when the operating section of each car (1a, 1b, 1c) is shorter than the length of the hoistway, such as when each car (1a, 1b, 1c) operates by dividing the section.

[0145] If the balance weight (21) shown in Fig. 23 is used as is, four balance weight pulleys (23) are used, so the effect of the movement distance of the balance weight (21) being shorter than that of the balance weight (21) using two balance weight pulleys (23) shown in Fig. 21 can be seen.

[0146] In Fig. 23, four balance pulleys (23) are used. Increasing the number of balance pulleys (23) and connecting the balance rope (22) in this way helps to reduce the movement distance of the balance weight (21), but because the weight of the balance weight (21) decreases when it acts as the weight of the balance weight function for each car (1a, 1b, 1c), the weight of the balance weight (21) must be increased.

[0147] Figures 24 to 27 are shown to confirm the length of the balance rope (22) required for the balance weight (21) and the balance rope (22) shown in Figure 23. It is assumed that each car (1a, 1b, 1c) runs from the top to the bottom of the elevator shaft or runs in sections of a certain distance, and the running distances are equal. The balance rope (22) must ensure the movement of each car (1a, 1b, 1c) from the upper end to the lower end of the section in which each car (1a, 1b, 1c) runs. In Figure 24, the intermediate pulleys (17a, 17b, 17c) are all at the upper end, and in Figure 27, they are at the lower end, spaced apart by the running distance of each car (1a, 1b, 1c). In Figure 25, only one intermediate pulley (17a) is at the lower end. In Fig. 25, the minimum allowable length of the balance rope (22) can be easily confirmed because the length of the balance rope (22) cannot be shorter than the length of the balance rope (22) shown in Fig. 25. That is why in Fig. 24, the balance (21) is not at the upper end, but is spaced apart by nearly 3 / 4 of the travel distance of the cars (1a, 1b, 1c). If the length of the balance rope (22) is added from left to right in Fig. 24, it is 0.25 + 0.75 + 0.75 + 0.75 + 0.75 + 0.25 = 5, while in Fig. 25, it is 0.5 + 1 + 1 +1 + 0 + 0 + 0.5 = 5. By determining the length of the balance rope (22) in this way, the weight of the balance rope (21) acting on the cars (1a, 1b, 1c) and the travel distance and travel section of the balance rope (21) can also be known through the analysis of FIGS. 24 to 27.

[0148] The weight of the counterweight (21) is distributed to the counterweight rope (22) attached eight times. Therefore, the weight of 1 / 8 of the counterweight (21) acts on the counterweight rope (22). The counterweight rope (22) is attached twice to each intermediate pulley (17a, 17b, 17c), so that 2 / 8 of the weight of the counterweight (21) acts on it, and each car rope (2a, 2b, 2c) is attached twice to each intermediate pulley (17a, 17b, 17c), so that 1 / 8 of the weight of the counterweight (21) acts on it, and each car (1a, 1b, 1c) is attached twice to each car rope (2a, 2b, 2c), so that 2 / 8 of the counterweight (21) acts as the weight of the counterweight function.

[0149] When each car (1a, 1b, 1c) moves 1 m, each intermediate pulley (17a, 17b, 17c) also moves 1 m in the opposite direction. When one intermediate pulley (17a, 17b, 17c) moves 1 m, it causes a change in the length of the connected counterweight rope (22) of 2 m, causing the counterweight (21) to move 2 / 8 m. When all cars (1a, 1b, 1c) move 1 m in the same direction simultaneously, the counterweight (21) moves 6 / 8 m.

[0150] Therefore, 12 / 8 must be considered by adding 3 / 4 of the above calculation result that the balance weight (21) must be away from the top of the elevator shaft and 6 / 8 of the distance that the balance weight (21) moves when all the cars (1a, 1b, 1c) move in the same direction simultaneously. The operating distance of the car can be limited by the length of the elevator shaft × 12 / 8 = operating distance of the car.

[0151] Fig. 28 shows a drawing that enables the same analysis of the length of the balance rope (22) in the case where the four balance pulleys (23) installed on the balance weight (21) shown in Figs. 23 to 27 are changed to two, the balance rope (22) is connected, and both ends of the balance rope (22) are fixed to the balance weight (21). The balance weight (21) is not located at the upper end where the intermediate pulleys (17a, 17b, 17c) are located, but is spaced apart by nearly 2 / 3 of the travel distance of the cars (1a, 1b, 1c), and each car (1a, 1b, 1c) acts as the weight of the balance weight (21) for the balance function, and when all cars (1a, 1b, 1c) move 1 m in the same direction simultaneously, the balance weight (21) moves 6 / 6 m. The car's travel distance may be limited by the length of the elevator shaft = car travel distance × 10 / 6.

[0152] Fig. 29 shows a case where the two balance pulleys (23) shown in Fig. 28 are used as is, but the ends of the balance rope (22) are not fixed to the balance weight (21).

[0153] Fig. 30 shows a case where the number of balance pulleys (23) shown in Figs. 24 to 27 is changed to five and the balance rope (22) is connected.

[0154] Fig. 31 shows another example of connecting a driving pulley (6a, 6b, 6c) having one pulley each, a balance weight (21), and each car (1a, 1b, 1c) installed in multiple numbers in one elevator shaft. Car ropes (2a, 2b, 2c), car pulleys (4a, 4b, 4c), driving pulleys (6a, 6b, 6c), a counterweight (21), a counterweight pulley (23), a counterweight rope (22), and a counterweight-side intermediate pulley (16a, 16b, 16c) are used, and three car ropes (2a, 2b, 2c) with one end fixed to three cars (1a, 1b, 1c) are connected to the respective car pulleys (4a, 4b, 4c) and driving pulleys (6a, 6b, 6c), and the other end is connected to the counterweight-side intermediate pulleys (16a, 16b, 16c), and the counterweight rope (22) connected to the counterweight (21) through six counterweight pulleys (23) is connected to the counterweight-side intermediate pulleys (16a, 16b, 16c). It is connected to the pulleys (16a, 16b, 16c). In this way, when the drive pulleys (6a, 6b, 6c) drive the connected cars (1a, 1b, 1c), a portion of the weight of the balance weight (21) acts as the weight of the balance weight function for each car (1a, 1b, 1c).

[0155] The fixed pulley (19) is installed so that the car ropes (2a, 2b, 2c) and the counterweight rope (22) do not touch each other in the middle. The positions of each car (1a, 1b, 1c) shown in Fig. 31 are only shown unfolded to clearly show the connection relationship of the counterweight rope (22) and to help understanding, and in reality, they are arranged in one elevator shaft. The positions of each car (1a, 1b, 1c) can be adjusted by adjusting the positions of each fixed pulley (19).

[0156] There is no limitation on the number of cars (1a, 1b, 1c), the type of car ropes (2a, 2b, 2c), and the type of balance rope (22).

[0157] Looking at the weight of the balance function that the weight of one balance weight (21) acts on each car (1a, 1b, 1c) in Fig. 31, the weight of the balance weight (21) is distributed to the balance weight rope (22) attached 12 times. Therefore, 1 / 12 of the weight of the balance weight (21) acts on the balance weight rope (22). Since the balance weight rope (22) is attached twice to the intermediate pulley (16a, 16b, 16c) on each balance weight side, 2 / 12 of the weight of the balance weight (21) acts on each car rope (2a, 2b, 2c) that is directly connected to the intermediate pulley (16a, 16b, 16c) on each balance weight side, 2 / 12 of the weight of the balance weight (21) also acts as it is on each car rope (2a, 2b, 2c). Each car (1a, 1b, 1c) is connected to two car ropes (2a, 2b, 2c) through two car pulleys (4a, 4b, 4c), so that 4 / 12 of the weight of the counterweight (21) acts as the weight of the counterweight function on each car (1a, 1b, 1c). Half of the weight of the car (1a, 1b, 1c) minus the weight of the counterweight function acted on by the counterweight rope (22) acts on one driving pulley (6a, 6b, 6c).

[0158] When one car (1a, 1b, 1c) moves 1 m, the length of the car rope (2a, 2b, 2c) that supports the car (1a, 1b, 1c) changes by 2 m, and this 2 m change in the length of the car rope (2a, 2b, 2c) causes the intermediate pulley (16a, 16b, 16c) on the connected balance weight side to move by 2 m, which causes a 4 m change in the length of the balance weight rope (22) that supports the balance weight (21), causing the balance weight (21) to move by 4 / 12 m. Therefore, in a case like Fig. 31, the balance weight (21) moves 1 / 3 of the distance in the opposite direction for the movement distance of each car (1a, 1b, 1c). When all the cars (1a, 1b, 1c) move 1 m in the same direction, the middle pulleys (16a, 16b, 16c) on the balance side all move 2 m, but the balance weight (21) moves 1 m.

[0159] In Fig. 31, when all cars (1a, 1b, 1c) move 1 m in the same direction, even if the balance weight (21) moves 1 m, the middle pulley (16a, 16b, 16c) on the balance weight side moves 2 m, so the entire length of the hoistway must be shared between the middle pulley (16a, 16b, 16c) on the balance weight side and the balance weight (21). This would be suitable when the operating section of each car (1a, 1b, 1c) is short compared to the length of the hoistway, such as when each car (1a, 1b, 1c) is divided into sections of a certain distance and operated.

[0160] FIGS. 32 to 35 are shown to confirm the length of the balance rope (22) required for the balance weight (21) and the balance rope (22) shown in FIG. 31. Each car (1a, 1b, 1c) runs from the top to the bottom of the elevator shaft or runs in sections of a certain distance, and it is assumed that the running distances are equal. The balance rope (22) must ensure the movement of each car (1a, 1b, 1c) from the upper end to the lower end of the section in which each car (1a, 1b, 1c) runs. In FIG. 32, the middle pulleys (16a, 16b, 16c) on the balance side are all at the upper end, and in FIG. 35, the middle pulleys (16a, 16b, 16c) are at the lower end at a distance twice the running distance of each car (1a, 1b, 1c). In Fig. 33, only one intermediate pulley (16a) is at the lower end. In Fig. 33, the minimum allowable length of the balance rope (22) can be easily confirmed, because the length of the balance rope (22) cannot be shorter than the length of the balance rope (22) shown in Fig. 33. That is why in Fig. 32, the balance (21) is not at the upper end, but is spaced apart by 10 / 12 times the travel distance of the cars (1a, 1b, 1c). If solved with a formula, the length of the balance rope (22) in Fig. 32 is 0 × 6 + 10 / 12 Х 6 = 5, and in Fig. 33, it is 2 / 12 Х 6 + 1 Х 4 = 5.

[0161] By determining the length of the balance rope (22) in this way, the travel distance and travel section of the balance rope (21) can also be known for the travel distance of the car (1a, 1b, 1c) through the analysis of FIGS. 32 to 35.

[0162] Therefore, the above calculation result of 10 / 12, which requires the balance weight (21) to be away from the top of the elevator shaft, and the distance 1 that the balance weight (21) moves when all the cars (1a, 1b, 1c) move in the same direction simultaneously, must be added to 22 / 12, which must be considered. The operating distance of the car can be limited by the length of the elevator shaft × 22 / 12 = operating distance of the car.

[0163] It can also be seen in Fig. 31 that the number of counterweight pulleys (23) can be increased or decreased. It is also possible to remove one counterweight pulley (23) from each side of the counterweight (21) and secure both ends of the counterweight rope (22) to the floor.

[0164] Through the above explanation, it can be sufficiently understood that various changes are possible in the connection of the balance rope (22), and an appropriate connection method can be used as needed.

[0165] Fig. 31 shows an example of connecting a balance weight (21) and each car (1a, 1b, 1c). The actual location of each car (1a, 1b, 1c) is within one elevator shaft, and they are arranged so as not to collide with each other vertically within the elevator shaft. The method of preventing the balance weight ropes (22) from touching each other in the middle is the same as that described in Fig. 11 above.

[0166] Fig. 36 shows an example in which the same number of car-connecting balance weights (21a, 21b, 21c) are used for multiple cars (1a, 1b, 1c) installed in one elevator shaft. Two fixing rods (20a, 20b, 20c) for balance weights are installed for each car-connecting balance weight (21a, 21b, 21c), and two fixing rods (11a, 11b, 11c) for balance weights are installed for each car (1a, 1b, 1c), and each fixing rod (20a, 20b, 20c) for balance weights and each fixing rod (11a, 11b, 11c) for balance weights are connected one by one by car-connecting balance weight ropes (22a, 22b, 22c).

[0167] In each of the cars (1c) of FIGS. 8, 9, and 15, a car pulley (5c) for connecting a balance rope is installed in place of the fixed rod (12c), and it can be seen that the car ropes (3c) for connecting a balance rope are connected to each other. In the same way, a car pulley (5a, 5b, 5c) for connecting a balance rope may be installed in place of each of the fixed rods (11a, 11b, 11c) for connecting a balance rope in FIG. 36, and a balance pulley (23) may be installed in place of the fixed rods (20a, 20b, 20c) for the balance rope. When the car pulleys (5a, 5b, 5c) for connecting the counterweight ropes or the counterweight pulley (23) are installed, each counterweight rope (22a, 22b, 22c) is connected to each other from a state of being separated into two, and each becomes one. When both the car pulleys (5a, 5b, 5c) for connecting the counterweight ropes and the counterweight pulley (23) are installed, each counterweight rope (22a, 22b, 22c) will be in the shape of a loop.

[0168] The fixed pulley (19) is installed so that the car connecting balance ropes (22a, 22b, 22c) do not touch each other in the middle. If necessary, pulleys may be installed on the sides of some cars (1a, 1b) and on the sides of some car connecting balance ropes (21b, 21c) to serve an auxiliary role in preventing the car connecting balance ropes (22a, 22b, 22c) from touching each other. This can be applied commonly to all cars.

[0169] Fig. 36 shows the relationship between the cars (1a, 1b, 1c) arranged in one elevator shaft and the car-connecting balance weights (21a, 21b, 21c). It can be seen that the car-connecting balance weight ropes (22a, 22b, 22c) do not touch the sides of the cars (1a, 1b, 1c) and the car-connecting balance weights (21a, 21b, 21c). If the cars (1a, 1b, 1c) operate without colliding with each other vertically, the car-connecting balance weights (21a, 21b, 21c) will also not collide with each other vertically. The positions of the balance weight fixing rods (20a, 20b, 20c) and the balance weight connecting rods (11a, 11b, 11c) can be adjusted.

[0170] There is no limitation on the number of cars (1a, 1b, 1c) and the type of counterweight ropes (22a, 22b, 22c).

[0171] The weight of each car connection balance weight (21a, 21b, 21c) is applied to each car (1a, 1b, 1c) through the connected balance weight rope (22a, 22b, 22c).

[0172] Looking at the movement of the car connecting balance weights (21a, 21b, 21c) in Fig. 36, the movement distance of each car connecting balance weight (21a, 21b, 21c) is the same as the movement distance of each car (1a, 1b, 1c) connected by the car connecting balance weight rope (22a, 22b, 22c), and only the direction is opposite. The car (1a) installed at the top cannot go to the bottom floor of the hoistway because of the other cars (1b, 1c), and the car (1c) installed at the bottom cannot go to the top ceiling of the hoistway because of the other cars (1a, 1b). Accordingly, the movable section of each car (1a, 1b, 1c) becomes shorter than the distance from the ceiling to the floor of the elevator shaft, and since the movable section of each car connecting balance weight (21a, 21b, 21c) is also under the same condition, there is no problem in the operation of each car (1a, 1b, 1c) and each car connecting balance weight (21a, 21b, 21c).

[0173] The driving devices shown in FIGS. 10 and 12 may also be applied to each car (1a, 1b, 1c) of FIG. 36 to drive each car (1a, 1b, 1c). When the driving device shown in FIG. 10 is applied, the driving pulleys (6a, 6b, 6c) with one pulley shown in FIG. 10 may be replaced with driving pulleys (7a, 7b, 7c) with two pulleys shown in FIG. 15, as described in the detailed description of FIG. 10, and both ends of the car ropes (2a, 2b, 2c) for connecting the driving pulleys may be connected to the two pulleys of the driving pulleys (7a, 7b, 7c), respectively. As detailed in Fig. 10, in addition, the two drive pulley connecting car pulleys (4a) may be changed to fixed rods (13a) as shown in Fig. 12, and each end of the car rope (2a) may be fixed to the two fixed rods (13a), respectively.

[0174] When applying the driving device shown in Fig. 12, as in the detailed description of Fig. 12, the driving pulleys (6a, 6b, 6c) with one pulley shown in Fig. 12 may be replaced with driving pulleys (7a, 7b, 7c) with two pulleys shown in Fig. 15, and both ends of the car ropes (2a, 2b, 2c) for connecting the driving pulleys may be respectively connected to the two pulleys of the driving pulleys (7a, 7b, 7c). In addition, as in the detailed description of Fig. 12, each car rope (2a, 2b, 2c) for connecting the driving pulleys may be cut in the middle so that both ends thereof may be fixed.

[0175] Here, the drive pulleys (6a, 6b, 6c, 7a, 7b, 7c) can be connected to a traction machine or the like in practice. The traction machine can include an electric motor.

[0176] Also, each car (1a, 1b, 1c) can be raised or lowered depending on the rotation direction of each drive pulley (6a, 6b, 6c, 7a, 7b, 7c).

[0177] The driving pulleys (7a, 7b, 7c) with two pulleys shown in FIG. 15 may be applied to the car connecting balance ropes (22a, 22b, 22c) between the respective cars (1a, 1b, 1c) and the car connecting balance weights (21a, 21b, 21c) in FIG. 36, or the driving pulleys (6a, 6b, 6c) with one pulley shown in FIG. 20 may be applied. In order to use a drive pulley (6a, 6b, 6c) with one pulley, instead of installing two fixing rods (11a, 11b, 11c) for connecting the balance weights on each car (1a, 1b, 1c), two car pulleys (5a, 5b, 5c) for connecting the balance weight ropes are installed in their place, or instead of installing two fixing rods (20a, 20b, 20c) for the balance weights on each car (21a, 21b, 21c), two balance weight pulleys (23) are installed in their place, and each balance weight rope (22a, 22b, 22c) is connected to each other from a state of being separated into two to become one, and each drive pulley (6a, 6b, 6c) is connected to each balance weight rope (22a, 22b, It is recommended to connect to one of the 22c). And instead of installing two fixing rods (11a, 11b, 11c) for connecting the balance weights on each car (1a, 1b, 1c), two car pulleys (5a, 5b, 5c) for connecting the balance weight ropes are installed in their place, and instead of installing two fixing rods (20a, 20b, 20c) for the balance weights on each car (21a, 21b, 21c), two balance weight pulleys (23) are installed in their place, and each balance weight rope (22a, 22b, 22c) is connected to each other in a state of being separated into two pieces to form one loop, and one point of each balance weight rope (22a, 22b, 22c) is fixed, or the loop is cut so that both ends are fixed to two points, and each driving pulley (6a, 6b, 6c) It is also good to connect to one point of each balance rope (22a, 22b, 22c).

[0178] The drive pulley (7a, 7b, 7c) with two pulleys can be used both when the fixed rod (11a, 11b, 11c, 20a, 20b, 20c) is installed and when the pulley (5a, 5b, 5c, 23) is installed.

[0179] The drive pulleys (7a, 7b, 7c, 6a, 6b, 6c) can be connected to a traction machine or the like in practice. The traction machine can include an electric motor.

[0180] Also, each car (1a, 1b, 1c) can be raised or lowered depending on the rotation direction of each drive pulley (7a, 7b, 7c, 6a, 6b, 6c).

[0181] For newly installed elevators or existing elevators, the multi-car elevator according to the present invention will be able to easily operate by installing multiple cars in a conventional hoistway as needed and connecting a counterweight rope to each car.

Claims

1. In a multi-car elevator, A counterweight having one or more counterweight pulleys installed as movable pulleys; and A balance rope connected to one or more of the above balance pulleys; A multi-car elevator characterized in that the above-mentioned counterweight functions as a counterweight for a plurality of cars through the above-mentioned counterweight rope.

2. In claim 1, Further comprising a car pulley or fixed bar for connecting a balance rope installed on each of the above plurality of cars; A multi-car elevator, characterized in that the counterweight rope is connected to the car pulley or the fixed bar for connecting the counterweight rope of each of the plurality of cars.

3. In claim 1, A car pulley or fixed bar for connecting a counterweight rope installed on each of the above-mentioned plurality of cars; A middle pulley having three pulleys, a middle pulley having two pulleys, or a middle pulley on the counterweight side, for each of the above plurality of cars; and Further comprising a car rope for connecting a balance rope to each of the above plurality of cars; A multi-car elevator, characterized in that each of the plurality of cars is connected to each of the counterweight rope connecting car pulleys or the fixed rods and each of the intermediate pulleys with three pulleys, the intermediate pulleys with two pulleys, or the intermediate pulleys on the counterweight side by each of the counterweight rope connecting car ropes, and each of the intermediate pulleys with three pulleys, the intermediate pulleys with two pulleys, or the intermediate pulleys on the counterweight side are connected to the counterweight ropes.

4. In multi-car elevators, A counterweight for connecting the cars and a counterweight rope for connecting the cars, each for a plurality of cars; A car pulley for connecting a counterweight rope or a fixed bar for connecting a counterweight installed on each of the above plurality of cars; and Including a balance pulley or a fixed bar for a balance weight installed on each of the above car connection balance weights; A multi-car elevator, characterized in that each of the plurality of cars is connected to a respective car pulley for connecting the counterweight rope or a fixed rod for connecting the counterweight, and each of the counterweight pulleys or fixed rods for the counterweights is connected to a respective car connecting counterweight rope.

5. In claim 2, A car pulley or second fixed bar for connecting a drive pulley installed in each of the above plurality of cars; A drive pulley having one pulley or a drive pulley having two pulleys for each of the plurality of cars; and Further comprising a car rope for connecting a drive pulley to each of the above plurality of cars; A multi-car elevator, characterized in that each of the plurality of cars is connected to a respective car pulley for connecting the drive pulley or the second fixed rod and each of the drive pulleys having one pulley or the drive pulleys having two pulleys by a car rope for connecting the drive pulleys.

6. In claim 3, A car pulley or second fixed bar for connecting a drive pulley installed in each of the above plurality of cars; A drive pulley having one pulley or a drive pulley having two pulleys for each of the plurality of cars; and Further comprising a car rope for connecting a drive pulley to each of the above plurality of cars; A multi-car elevator, characterized in that each of the plurality of cars is connected to a respective car pulley for connecting the drive pulley or the second fixed rod and each of the drive pulleys having one pulley or the drive pulleys having two pulleys by a car rope for connecting the drive pulleys.

7. In claim 4, A car pulley or second fixed bar for connecting a drive pulley installed in each of the above plurality of cars; A drive pulley having one pulley or a drive pulley having two pulleys for each of the plurality of cars; and Further comprising a car rope for connecting a drive pulley to each of the above plurality of cars; A multi-car elevator, characterized in that each of the plurality of cars is connected to a respective car pulley for connecting the drive pulley or the second fixed rod and each of the drive pulleys having one pulley or the drive pulleys having two pulleys by a car rope for connecting the drive pulleys.

8. In claim 2, Each of the above plurality of cars further comprises a differential device and two drive pulleys connected to both sides of the differential device; A multi-car elevator, characterized in that each of the plurality of cars has a counterweight rope connected to two drive pulleys connected to both sides of each of the differential devices.

9. In claim 3, Each of the above plurality of cars further comprises a differential device and two drive pulleys connected to both sides of the differential device; A multi-car elevator, characterized in that each of the plurality of cars has a car rope for connecting the counterweight ropes connected to two drive pulleys connected to both sides of each of the differential devices.

10. In claim 1, A car pulley for connecting a counterweight rope, a car pulley for connecting a driving pulley, or a fixed bar installed on each of the above-mentioned plurality of cars; A middle pulley having three pulleys, a middle pulley having two pulleys, a counterweight side middle pulley, or a car side middle pulley for each of the above plurality of cars; A car rope for connecting a balance rope to each of the above plurality of cars or a car rope for connecting a driving pulley; and Further comprising a drive pulley having two pulleys or a drive pulley having one pulley for each of the above plurality of cars; Each of the above plurality of cars is provided with a car pulley for connecting the balance rope, a car pulley for connecting the driving pulley, or the fixed bar. a drive pulley having the two pulleys mentioned above or a drive pulley having the one pulley mentioned above, and Each of the above three pulleys, the above two pulleys, the above counterweight side pulley, or the above car side pulley A multi-car elevator, characterized in that each of the above-mentioned counterweight rope connecting car ropes or the above-mentioned driving pulley connecting car ropes is respectively connected, and each of the above-mentioned intermediate pulleys with three pulleys, the above-mentioned intermediate pulleys with two pulleys, the above-mentioned counterweight-side intermediate pulleys, or the above-mentioned car-side intermediate pulleys are connected to the counterweight ropes, and the car-side intermediate pulleys are connected to the counterweight ropes via the intermediate ropes and the counterweight-side intermediate pulleys.

11. In claim 4, Further comprising a drive pulley having two pulleys or a drive pulley having one pulley for each of the above plurality of cars; A multi-car elevator, characterized in that each of the above plurality of cars has a driving pulley having two pulleys or a driving pulley having one pulley, each of which is connected to a respective car-connecting counterweight rope.

12. In a multi-car elevator, A multi-car elevator, characterized in that a car pulley for connecting a driving pulley, a car pulley for connecting a counterweight rope, a fixing rod for connecting a counterweight, and a fixing rod, which can be installed in each of a plurality of cars, are each installed on imaginary radial straight lines in different directions from the central vertical line of each of the plurality of cars, but are installed at a position that is off the edge of each of the plurality of cars.

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