CN100586830C - elevator system - Google Patents

Abstract

An elevator system (100) has a first car (31a) and a second car (31b), which are arranged vertically in a shaft (30). The first car (31a) is connected to a first counterweight (32a) via a main cable (45a). The second car (31b) is connected to a second counterweight (32b) via a main cable (45b). The first counterweight (32a) and the second counterweight (32b) are arranged vertically. The main cables (45a, 45b) are wound around corresponding traction machines (41a, 41b), respectively. The traction machines (41a, 41b) are located in the upper part of the shaft (30). The first car (31a) and the second car (31b) are operated independently by controlling the traction machines (41a, 41b) separately.

Description

elevator system

technical field

The present invention relates to an elevator system that transports passengers and goods to each floor in a building.

Background technique

Elevator systems typically have one car located in one shaft in a building. The car moves in the shaft and transports passengers and goods to the destination floor.

The number of passengers and goods moving in a building increases with the number of floors in the building and the number of elevator systems must be increased. However, if the ratio of elevator space to floor space of a building increases, the utilization of the overall floor space decreases.

As a method for solving this problem, a double-deck elevator system in which two cars are vertically stacked in a main body has been proposed and put into practical use. However, in a double-deck elevator system, although only one car must stop at a certain floor, the other car must stop at the next floor. Therefore, even if the double-deck elevator system has two cars, its transportation efficiency is not significantly improved. Even during periods when only a few passengers use the elevator, two cars must be operated to carry several passengers or goods. So it increases the energy required to transport a person.

Japanese Patent No. 3252575 and Japanese Patent Application KOKAI Publication No. 59-133188 disclose an elevator system having two or more cars independently movable in a shaft. The elevator system described in Japanese Patent No. 3252575 is constructed as shown in FIG. 7 . In this elevator system, a car 1a for an upper floor, a car 1b for an intermediate floor, and a car 1c for a lower floor are vertically arranged in a shaft 7, and the three cars There is a space between the compartments. Hoisting machines 3a, 3b and 3c are provided for the cars 1a, 1b and 1c, respectively.

The hoisting machines 3a, 3b, and 3c have drive pulleys 4a, 4b, and 4c, respectively. Main cables 2a, 2b and 2c are wound around drive pulleys 4a, 4b and 4c, respectively. One end side of each main rope 2a, 2b and 2c is connected to each car 1a, 1b and 1c. The other end of each main rope 2a, 2b and 2c is guided to the rear of the car 1a, 1b and 1c through deflector sheaves 5a, 5b and 5c and is connected to counterweights 6a, 6b and 6c respectively . The counterweights 6a, 6b, and 6c are offset by the deflection pulleys 5a, 5b, and 5c so as not to interfere with each other.

In the elevator system described in Japanese Patent No. 3252575 as shown in FIG. 7, counterweights 6a, 6b, and 6c are suspended from deflection pulleys 5a, 5b, and 5c at positions offset from each other, thereby preventing interference. Therefore, the shaft 7 needs to be wider. The structure of this elevator system is insufficient to increase the space utilization of the building.

The occupied space can be reduced by arranging the counterweights 6a, 6b and 6c longitudinally and moving them along a pair of guide rails. However, if this structure is applied to the elevator system shown in Fig. 7, the moving range of the cars 1a, 1b and 1c is greatly limited. For example, when the car 1a moves upward while the cars 1b and 1c stop at the lower floors, the counterweight 6a interferes with the counterweight 6b on the ascending path, and the car 1a for the upper floors cannot reach the highest floor .

The elevator system described in Japanese Patent Application KOKAI Publication No. 59-133188 is constructed as shown in FIGS. 8 and 9 . The elevator system has a first cage 11 a and a second cage 11 b located in the same shaft 10 . The first cage 11a is located above the second cage 11b. A first counterweight 12a and a second counterweight 12b are provided for the cars 11a and 11b, respectively. The machine room 13 is arranged above the shaft 10 . Hoisting machines 14 a and 14 b corresponding to the first car 11 a and the second car 11 b are provided in the machine room 13 .

The main ropes 15a and 15b are wound around the traction machines 14a and 14b, respectively. The car 11a/11b and the counterweight 12a/12b are suspended in the shaft 10 by main cables 15a and 15b. The cars 11a and 11b move independently by individually driving the traction machines 14a and 14b.

In the elevator system described in Japanese Patent Application KOKAI Publication No. 59-133188, cars 11a and 11b and counterweights 12a and 12b are arranged vertically with a space therebetween, as shown in FIGS. 8 and 9 . This reduces the width of the shaft 10 in the front-to-rear direction, and increases space utilization in the floors of the building.

However, since the machine room 13 for the hoisting machines 14a and 14b is arranged above the shaft 10 in this elevator system, the space utilization in the height of the building is reduced.

Contents of the invention

The present invention provides an elevator system having two or more cars in one shaft and improving space utilization of a building in horizontal and vertical directions.

An elevator system according to the invention has a car in a shaft, a counterweight, ropes and a traction machine. The car is arranged along the vertical direction. Counterweights are provided for the cars one by one. Cables connect the cars to corresponding counterweights and suspend them in the shaft. Ropes connected to the car and counterweight are wound around a traction machine which moves the paired car and counterweight along the shaft. The traction machine is arranged in the highest part of the shaft, the traction machine being arranged in the part corresponding to the space between the vertical wall of the shaft and the area through which the car passes. In addition, the traction machine corresponding to the lowest car is arranged in the lowermost part of the shaft, and the other traction machines are arranged in the highest part of the shaft.

The traction machines include at least first and second traction machines. The tallest car corresponds to the highest counterweight. The first traction machine drives the tallest car and counterweight and is located in the tallest part of the shaft. The movement distance of the highest counterweight is 1/2 of the movement distance of the corresponding highest car. The highest counterweight moves in a range above the middle of the shaft. The second traction machine drives one of the other cars other than the tallest car and the corresponding counterweight, and is arranged in the middle of the shaft. These cars and counterweights move in a range below the middle of the shaft.

Additionally, the tallest car corresponds to the tallest counterweight. The first traction machine drives the tallest car and counterweight and is located in the tallest part of the shaft. The movement distance of the highest counterweight is 1/2 of the movement distance of the corresponding highest car. The highest counterweight moves in a range above the middle of the shaft. The second traction machine drives one of the other cars than the tallest car and the corresponding counterweight and is arranged in the lowermost part of the shaft. These cars and counterweights move in a range below the middle of the shaft.

In this case, the traction machine is arranged in a portion corresponding to the space between the vertical wall of the shaft and the area through which the car passes.

While the tallest car stops at the lowest floor of the building, the other cars stop in the lower part of the shaft below the lowest floor. While the lowest car stops at the highest floor of the building, the other cars stop in the upper part of the shaft above the highest floor.

The tallest car has guide pulleys in the upper part. The rope corresponding to the tallest car is wound around said guide pulley, and the tallest car is suspended in the shaft. The cabs below the tallest cab have guide pulleys in the lower part. The cables corresponding to these cars are wound around guide pulleys, and the cars are suspended in the shaft.

The tallest car has shock absorbers. The shock absorber is used to pass the rope wound around the car located below the highest car along the side of the highest car and to limit the swing width of the rope.

The tallest counterweight has a shock absorber. The shock absorber passes the cable along the side of the highest counterweight, the cable suspends the counterweight located below the highest counterweight, and the shock absorber limits the swing width of the cable.

Description of drawings

1 is a side view showing the structure of an elevator system according to a first embodiment of the present invention;

Figure 2 is a horizontal sectional view of the elevator system taken along the line A-A in Figure 1;

Figure 3 is a side perspective view of a variant of the elevator system shown in Figure 1;

4 is a side view showing the structure of an elevator system according to a second embodiment of the present invention;

5 is a side view showing the structure of an elevator system according to a third embodiment of the present invention;

6 is a side view showing the structure of an elevator system according to a fourth embodiment of the present invention;

Fig. 7 is a side view showing the structure of a prior art elevator system;

Fig. 8 is a side view showing the structure of another elevator system of the prior art;

Fig. 9 is a front view of the structure of the elevator system shown in Fig. 8 .

Detailed ways

An elevator system 100 according to a first embodiment of the present invention will be described below with reference to FIGS. 1-6. The elevator system 100 shown in FIG. 1 has a first car 31a, a second car 31b, a first counterweight 32a, a second counterweight 32b, a first main rope 45a, the second main rope 45b, the first traction machine 41a and the second traction machine 41b.

The first cage 31a is always located above the second cage 31b. The first counterweight 32a is always located below the second counterweight 32b.

The first car 31a has a pair of rotatable guide pulleys 35 at the upper part. The second cage 31b has a pair of rotatable guide pulleys 36 at the lower portion. The first counterweight 32a has a pair of rotatable guide pulleys 37 at the upper portion. The second counterweight 32b has a pair of rotatable guide pulleys 38 at the upper portion.

The first hoisting machine 41a and the second hoisting machine 41b are arranged in the upper part of the shaft 30, as shown in FIG. In the region between the regions, as shown in Figure 2. The first main rope 45a is wound around the first traction machine 41a, and the second main rope 45b is wound around the second traction machine 41b.

One side of the first main rope 45a extending downward from the portion wound around the hoisting machine 41a is wound sequentially around two guide pulleys 35 provided at the top of the first car 31a, and thereby changes direction up. The tail end of the first main cable 45a is connected to a fixed part 47 which is arranged in the upper part of the shaft 30 . The other side of the first main rope 45a is wound sequentially around two guide pulleys 37 provided at the top of the first counterweight 32a, and thereby changes direction upward. The tail end of the first main rope 45 a is connected to a fixed part 48 which is arranged in the upper part of the shaft 30 . The first main rope 45a suspends the first car 31a and the first counterweight 32a , which are movable in the vertical direction in the shaft 30 .

One side of the second main rope 45b extending downward from a portion around the winding machine 41b is sequentially wound around two guide pulleys 36 provided at the bottom of the second car 31b, and thus changes The direction is upwards and the tail end of the second main cable 45 b is connected to a fixed part 47 which is arranged in the upper part of the shaft 30 . The other side of the second main rope 45b is wound sequentially around two guide pulleys 38 provided at the top of the second counterweight 32b, and thereby changes direction upward, and the tail end of the second main rope 45b is connected To the fixing part 48 , the part 48 is arranged in the upper part of the shaft 30 . The second main rope 45b suspends the second car 31b and the second counterweight 32b, which are movable in the shaft 30 in the vertical direction.

The first main cable 45a passes along the side of the second counterweight 32b to wrap around it. The second counterweight 32b has circular shock absorbers 50 on both sides. By passing the first main cable 45a through the shock absorber 50, the first main cable 45a is prevented from shaking.

The second main rope 45b passes along the side of the first car 31a to wrap around it. The first cage 31a has circular shock absorbers 51 on both sides. By passing the second main cable 45b through the shock absorber 51, the second main cable 45b is prevented from rattling.

As shown in FIG. 2 , the car guide rail 55 and the counterweight guide rail 56 extend vertically in the shaft 30 . The car guide rails 55 are provided on both sides of the first car 31a and the second car 31b. The first car 31 a and the second car 31 b move vertically along the car guide rail 55 . The weight guide rails 56 are provided on both sides of the first weight 32a and the second weight 32b. The first counterweight 32 a and the second counterweight 32 b move vertically along the counterweight rail 56 .

In FIG. 1 , the lowest floor of the building is indicated by FL, and the highest floor by FH. The shaft 30 ensures sufficient retraction space 58 in the lower part for stopping the second car 31b when the first car 31a stops at the lowest floor FL. Likewise, the shaft 30 ensures sufficient retraction space 59 in the upper part for stopping the first car 31a when the second car 31b stops at the uppermost floor FH.

The elevator system 100 drives the traction machines 41a and 41b by operating the control device to independently move the cars 31a and 31b. In this case, the operation control device integrates the operating states of the first car 31a and the second car 31b, and drives the traction machines 41a and 41b so as not to cause a collision of the cars in the shaft 30, thereby controlling the first car. The range of motion of the car 31a and the second car 31b.

In particular, when the first car 31 a reaches the lowest floor FL, the second car 31 b has already been moved to the retreat space 58 in the lowermost part of the shaft 30 . When the second car 31 b reaches the uppermost floor FH, the first car 31 a has already been moved to the retreat space 59 in the highest part of the shaft 30 . Therefore, the first car 31a and the second car 31b can reach every floor between the lowest floor FL and the highest floor FH.

During periods when several passengers use the elevator, the elevator system 100 may stop one of the cars, for example, the first car 31a in the retreat space 59, and operate only the other second car 31b to serve each floor. Compared with a double-deck elevator that must always operate two cars, the elevator system 100 can reduce energy consumption to almost half, and is advantageous from the viewpoint of energy saving.

When the building is swayed by a strong wind or shaken by an earthquake, the second main rope 45b passing along the side of the first car 31a swings toward the first car 31a. However, since the second main rope 45b is limited in its swing width by the shock absorber 51 connected to the first car 31a, the rope is prevented from contacting or colliding with the first car 31a.

Also, when the building shakes or vibrates, the first main rope 45a passing along the side of the second counterweight 32b will swing toward the second counterweight 32b. Even in this case, since the swing width of the first main cable 45a is limited by the shock absorber 50 connected to the second weight 32b, the cable is prevented from contacting or colliding with the second weight 32b.

The first car 31a is suspended in the shaft 30 by a first main rope 45a wound around a guide pulley 35 arranged at the top of the car. The second car 31b is suspended in the shaft 30 by a second main rope 45b wound around a guide pulley 36 arranged at the bottom of the car. Since there is no guide pulley between the first cage 31a and the second cage 31b, the distance between the cages can be reduced. That is, when the second car 31b stops at a certain floor N of the building, the first car 31a may stop at the adjacent floor (N+1). Thus, elevator system 100 can serve two floors N and (N+1) simultaneously.

The first cage 31a and the second cage 31b and the first counterweight 32a and the second counterweight 32b are arranged vertically to each other in the shaft 30 . In the upper part of the shaft 30, the traction machines 41a and 41b are arranged in the area formed between the vertical walls of the shaft 30 and the area where the first car 31a and the second car 31b run Extend vertically. Compared with conventional systems, the horizontal cross section of the shaft 30 can be reduced, and there is no need to provide a machine room for the traction machine at the upper part of the shaft 30 . Accordingly, the elevator system 100 improves space utilization in the horizontal and vertical directions of the building.

In the first embodiment, the first hoisting machine 41a and the second hoisting machine 41b are arranged in phase with the gap between the vertical wall of the shaft 30 and the area where the first car 31a and the second car 31b move. In the upper part of the corresponding shaft 30 . However, it is permissible to arrange the first traction machine 41 a and the second traction machine 41 b at positions outside the area corresponding to the space as long as it is in the upper portion of the shaft 30 .

In the first embodiment, two counterweights 32a and 32b are suspended in a region on the rear side of the region where the cars 31a and 31b move. However, when sufficient space cannot be secured in the rear sides of the cars 31a and 31b, it is allowed to hang the first counterweight 32a on the right side of the area where the cars 31a and 31b move, and hang the second counterweight on the The area on the left side is modified as shown in Figure 3. In FIG. 3 , components having the same functions as those of the elevator system 100 of the first embodiment have the same reference numerals.

An elevator system 100a according to a second embodiment will be described below with reference to FIG. 4 . Components having the same functions as those in the elevator system 100 of the first embodiment have the same reference numerals, and detailed description will be omitted. The elevator system 100 a of the second embodiment has a first hoisting machine 41 a located in the upper part of the shaft 30 and a second hoisting machine 41 b located in the pit 63 in the lower part of the shaft 30 . The elevator system 100a has a deflection sheave 64 and a pair of turning sheaves 65 and 66 adjacent to the first hoisting machine 41a.

The first main rope 45a is wound around the first hoisting machine 41a. On the basis of the part wound around the first traction machine 41a, one side of the first main rope 45a extends downward, and is wound sequentially around two guide pulleys 35, which are arranged on the extended path. At the top of the first cab 31a, and thus changes direction upwards. The tail end of the one side of the first main rope 45 a is connected to a fixing part 47 provided in the upper part of the shaft 30 .

The other side of the first main rope 45a is guided downwards by deflection pulleys 64, wound around two guide pulleys 37 provided at the top of the first counterweight 32a, and thereby changes direction upwards. The tail end of the other side of the first main rope 45 a is connected to a fixing member 48 provided in an upper portion of the shaft 30 . The first main rope 45a suspends the first car 31a and the first counterweight 32a , which are movable in the vertical direction in the shaft 30 .

The second main rope 45b is wound around the second hoisting machine 41b which is arranged in the pit 63 . On the basis of the portion wound around the second hoisting machine 41b, one side of the second main rope 45b extending upward is wound around the diverting pulley 65, and thereby changes direction downward. The diverted second main rope 45b is wound sequentially around the two guide pulleys 36 provided at the bottom of the second cage 31b and thereby changes direction again upwards. The tail end of the one side of the second main cable 45 b is connected to a fixing part 47 provided in the upper part of the shaft 30 .

The other side of the second main rope 45b extends upward from the second traction machine 41b, is wound around the diverting pulley 66, and thereby changes direction downward. The diverted second main rope 45b extends downward, wraps around one guide pulley 38 provided at the top of the second counterweight 32b, and thereby changes direction upward again. The tail end of the other side of the second main cable 45 b is connected to a fixing part 48 provided in the upper part of the shaft 30 . The second main rope 45b suspends the second car 31b and the second counterweight 32b, which are movable in the shaft 30 in the vertical direction.

Similar to the elevator system 100 of the first embodiment, the elevator system 100a drives the traction machines 41a and 41b individually, thereby moving the cars 31a and 31b independently to serve each floor of the building.

Similar to the elevator system 100 of the first embodiment, the elevator system 100a has setback spaces 58 and 59 . When the first car 31 a reaches the lowest floor FL, the second car 31 b has already stopped at the retreat space 58 provided in the lowermost part of the shaft 30 . When the second car 31b reaches the uppermost floor FH, the first car 31a has already stopped at the retreat space 59 provided in the highest part of the shaft 30 . Therefore, the first car 31a and the second car 31b can stop at every floor between the lowest floor FL and the highest floor FH.

During periods when several passengers use the elevator, the elevator system 100a may stop one of the cars, such as the first car 31a in the setback space 59, and operate only the other second car 31b to serve each floor. Compared with a double-deck elevator that must always operate two cars, the elevator system 100a can reduce energy consumption to almost half, and is advantageous from the viewpoint of energy saving.

When the building is swayed by a strong wind or shaken by an earthquake, the second main cable 45b controls its swing width through a shock absorber 51, which is connected to the first car 31a, preventing the main cable from contacting the first car 31a. The car 31a touches or collides. Also, the first main rope 45a can control its swing width through the shock absorber 50, which is connected to the second weight 32b, preventing the main rope from contacting or colliding with the second weight 32b.

The first car 31a is suspended in the shaft 30 by a first main rope 45a which is wound around two guide pulleys 35 arranged at the top. The second car 31b is suspended in the shaft 30 by a second main rope 45b which is wound around two guide pulleys 36 arranged at the bottom. Since there is no guide pulley between the first cage 31a and the second cage 31b, the distance between the cages can be reduced. That is, when the second car 31b stops at a certain floor N of the building, the first car 31a can stop at the next floor (N+1). Thus, elevator system 100a can serve two floors N and (N+1) simultaneously.

The first cage 31a and the second cage 31b and the first counterweight 32a and the second counterweight 32b are arranged vertically to each other in the shaft 30 . Traction machines 41 a and 41 b are provided in upper and lower parts of the shaft 30 . Compared with conventional systems, the horizontal cross-section of the shaft 30 can be reduced, and there is no need to provide a machine room for the traction machine in the upper part of the shaft. Accordingly, the elevator system 100a increases the space utilization of the building both horizontally and vertically.

An elevator system 100b according to a third embodiment will be described below with reference to FIG. 5 . Components having the same functions as those in the elevator systems 100 and 100a in the first and second embodiments have the same reference numerals, and detailed description will be omitted. In the elevator system 100b of the third embodiment, the first counterweight 32a is disposed higher than the second counterweight 32b. The first traction machine 41a is disposed in the upper portion of the shaft 30, and the second traction machine 41b is disposed in the middle of the shaft 30 in the vertical direction. The deflection pulley 64 is provided near the first hoisting machine 41a.

In the main rope 45a wound around the first traction machine 41a, on the basis of the portion wound around the traction machine, one side extends downward and is directly connected to the top of the first car 31a. The other side of the first main rope 45a is guided downwards by deflection pulleys 64, wrapped around two guide pulleys 37 connected to the top of the first counterweight 32a, and thus redirected upwards. The tail end of the other side of the first main rope 45 a is connected to a fixing part 48 provided in the upper part of the shaft 30 . The first main rope 45a suspends the first car 31a and the first counterweight 32a , which are movable in the vertical direction in the shaft 30 .

The second traction machine 41b is disposed in the middle of the shaft 30 in the vertical direction in a portion corresponding to the space formed in the horizontal direction between the vertical wall of the shaft 30 and the area where the cars 31a and 31b run. . The second main rope 45b is wound around the second hoisting machine 41b.

In the second main rope 45b, on the basis of the portion wound around the hoisting machine 41b, one side extends downward, and is wound sequentially around two guide pulleys provided at the bottom of the second car 31b. 36 around, and thereby change direction upwards. The tail end of the one side of the second main rope 45 b is connected to a fixing member 70 provided in the middle of the shaft 30 .

The other side of the second main rope 45b extends downward from the second traction machine 41b, is wound sequentially around two guide pulleys 38 provided at the top of the second counterweight 32b, and thereby changes direction upward. The diverted second main rope 45 b extends upward, and the tail end of the other side of the second main rope 45 b is connected to a fixing member 71 provided in the middle of the shaft 30 . The second main rope 45b suspends the second car 31b and the second counterweight 32b, which are movable in the shaft 30 in the vertical direction.

The elevator system 100b secures a retreat space 58 located below the lowest floor FL, which is the same as those in the first and second embodiments. In the elevator system 100b, when the first car 31a reaches the lowest floor FL, the second car 31b has stopped at the retreat space 58. As shown in FIG.

In the elevator system 100b, the moving distance of the first counterweight 32a is 1/2 of the moving distance of the first car 31a. The movement distance of the second counterweight 32b is the same as the movement distance of the second car 31b. In the elevator system 100b, even when the first car 31a moves in the shaft 30 to stop at all floors, the first counterweight 32a moves only in an upper range higher than the middle of the shaft 30. Since the second counterweight 32b is suspended between the fixing member 71 and the second traction machine 41b provided in the middle of the shaft 30, it does not interfere with the first counterweight 32a.

Therefore, in the elevator system 100b, the first hoisting machine 41a and the second hoisting machine 41b are controlled so that the second car 31b does not collide with the first car 31a located in a region lower than the fixed parts 70 and 71 interference occurs. When the first car 31a is positioned higher than the middle of the shaft 30, the first car 31a and the second car 31b move exactly like two independent elevators and can serve all floors of the building.

Buildings usually have an entrance at one of the lower floors. People visiting the building use the elevator 100b to move from the entrance floor to the destination floor. In other words, the number of passengers in the car decreases as the car rises to higher floors, during which time the passengers leave the elevator. In the elevator system 100b, the first car 31a and the second car 31b are operated for floors below the middle of the shaft, and only the first car 31a is operated for floors above the middle of the shaft. That is, the elevator system 100b is configured to operate two cars for lower floors with high utilization and operate one car for upper floors with low utilization. This increases operational efficiency compared to normal double-deck elevator systems.

In addition, in the elevator system 100b, when the first car 31a stops at the lowest floor FL, the second car 31b stops at the retreat space 58 . Therefore, the first car 31a can serve all floors. The second car 31b serves floors below the middle of the shaft 30 in which the second traction machine 41b is arranged.

When a building has an entrance to a platform, such as on any floor between the middle and the lowest floor, there are two large flows of people, up and down from the entrance. In this case, the elevator system 100b can effectively improve operation efficiency by using the first car 31a for people going up and using the second car 31b for people going down.

In addition, in the elevator system 100 b during periods when there are fewer passengers, only the first car 31 a is operated for each floor, and the second car 31 b stays in the retreat space 58 . In this manner of operation, the elevator system 100b can reduce energy consumption to almost half that of a double-deck elevator, which always operates two cars simultaneously. This is advantageous from the viewpoint of energy saving.

In the elevator system 100b, the first car 31a and the second car 31b and the first counterweight 32a and the second counterweight 32b are arranged vertically to each other, the first hoisting machine 41a is arranged in the upper part of the shaft 30, and the second The second traction machine 41b is arranged in the middle of the vertical shaft 30 . In the elevator system 100b, the horizontal cross-section of the shaft 30 can be reduced compared with a general elevator, and there is no need to provide a machine room for a traction machine in the upper portion of the shaft 30 . Accordingly, the elevator system 100b can increase floor area utilization as well as vertical space utilization of the building.

An elevator system 100c according to a fourth embodiment will be described below with reference to FIG. 6 . In the elevator 100c of the fourth embodiment, the first car 31a and the second car 31b, the first counterweight 32a and the second counterweight 32b, the first hoisting machine 41a, the deflection pulley 64, and the fixing members 48, 70 and 71 are provided at the same positions as those in the elevator system 100b of the third embodiment. The difference from the elevator system 100b of the third embodiment is that the second hoisting machine 41b is provided at a different position, and deflection pulleys 78 and 79 are newly provided.

In the elevator system 100c of the fourth embodiment, as in the elevator system 100b of the third embodiment, the first counterweight 32a is located above the second counterweight 32b. The first traction machine 41 a is provided in the upper part of the shaft 30 . The second hoisting machine 41b is provided in the pit 63 below the lowest floor FL in the shaft 30, as is the case with the second embodiment. The deflection pulley 64 is arranged in the vicinity of the first traction machine 41 a, and the deflection pulleys 78 and 79 are arranged at a similar vertical height to the fixed parts 70 and 71 which are arranged in the middle of the shaft 30 .

In the first main rope 45a wound around the first traction machine 41a, on the basis of the part wound around the traction machine, one side extends downward, and the far end is directly connected to the first car The top of 31a. The other side of the first main cable 45a extends downwards past the deflection pulley 64, wraps around the two guide pulleys 37 connected to the first counterweight 32a, and thereby changes direction upwards. The tail end of said other side of the first main cable 45 a is connected to a fixed part 48 which is located in the upper part of the shaft 30 . The first main rope 45a suspends the first car 31a and the first counterweight 32a, said car and counterweight being movable in the shaft 30 in the vertical direction.

In the second main rope 45b wound around the second hoisting machine 41b, on the basis of the portion wound around the hoisting machine, one side extends upward, and is wound around the diverting pulley 78, thereby changing the direction. Downwards, wraps around two guide pulleys 36 connected to the bottom of the second cage 31b, and thus extends upwards again. A tail end of one side of the second main rope 45 b is connected to a fixing part 70 provided at the middle of the shaft 30 .

The other end side of the second main rope 45b extends upward from the second traction machine 41b, is wound around the deflection pulley 79 so as to bend downward, and is wound around a guide connected to the top of the second counterweight 32b. around the pulley 38 and thus again upwards. The tail end of the other side of the second main rope 45 b is connected to a fixing part 71 provided in the middle of the shaft 30 . The second main rope 45b suspends the second car 31b and the second counterweight 32b, which are movable in the shaft 30 in the vertical direction.

A retreat space 58 is provided in the lower part of the shaft 30 so as to hold the second car 31b when the first car 31a stops at the lowest floor FL of the building.

In the elevator system 100c structured as described above, the first car 31a and the second car 31b and the first counterweight 32a and the second counterweight 32b operate in the same manner as the third embodiment. When the first car 31a and the first counterweight 32a move, the moving distance of the first counterweight 32a is 1/2 of the moving distance of the first car 31a. When the second car 31b and the second counterweight 32b move, the moving distance of the second counterweight 32b is the same as the moving distance of the second car 31b.

Operations of the first hoisting machine 41a and the second hoisting machine 41b are controlled so that the first car 31a does not interfere with the second car 31b in a range lower than where the fixing members 70 and 71 are disposed. Since the first car 31a and the second car 31b can be operated as independent elevators in the elevator system 100c, the operating efficiency for each floor in the building is improved.

When the first car 31 a stops at the lowest floor FL, the second car 31 b is located in the retreat space 58 . Only the first car 31a can serve all floors. The second car 31b serves the range below the middle of the shaft 30 where the fixing members 70 and 71 are disposed. When a building has an entrance to a platform, for example at a certain floor between the middle floor and the lowest floor, two large crowd flows arise, divided up and down from the entrance floor. In this case, the elevator system 100c can increase operational efficiency by using the first car 31a for people going up and using the second car 31b for people going down.

Also, in the elevator system 100c, only the first car 31a is operated for each floor during periods when there are only a few passengers, while the second car 31b is located in the retreat space 58 . Thus, the elevator system 100c can reduce energy consumption to almost half that of a double-deck elevator, which always operates two cars simultaneously. This is advantageous from the viewpoint of energy saving.

Since the first car 31a and the second car 31b and the first counterweight 32a and the second counterweight 32b are arranged in the vertical direction in the elevator system 100c, the horizontal cross section of the shaft 30 is can be reduced. In addition, in the elevator system 100c, the first hoisting machine 41a is located in the upper portion of the shaft, and the second hoisting machine 41b is located in the lower portion of the shaft 30 . Therefore, there is no need to provide a machine room for the traction machine in the upper part of the shaft 30 . The elevator system 100c can improve utilization of floor area and vertical space utilization of a building.

In the embodiment described here, the elevator system has two cars and two counterweights in one shaft. In the elevator system according to the invention, it is also possible to arrange a corresponding number of three or more cars and counterweights in the vertical direction in the shaft.

Industrial Applicability

The elevator system according to the present invention is highly efficient when applied to a high-rise building in which the hours of elevator use and floors are uneven.

Claims (12)

1. an elevator device (100) comprising:

(31a 31b), is arranged in the vertical shaft (30) along vertical direction a plurality of cars, and moves independently in vertical shaft (30);

A plurality of counterweights (32a, 32b), be provided for seriatim car (31a, 31b);

Cable (45a, 45b), with car (31a, 31b) (32a 32b) connects into rightly, and they is suspended in the vertical shaft (30) with corresponding counterweight; With

(41a 41b), is arranged in the highest part of vertical shaft (30) a plurality of towing machines, and (45a's cable one of 45b) reels around described towing machine, so that described car (31a, 31b) and corresponding counterweight (32a, 32b) to moving along vertical shaft (30)

Wherein (41a 41b) is arranged on that (31a is 31b) in the corresponding part in the space between the zone of process with the vertical wall of vertical shaft (30) and car to towing machine.

2. an elevator device (100a) comprising:

(31a 31b), is arranged in the vertical shaft (30) along vertical direction a plurality of cars, and moves independently in vertical shaft (30);

A plurality of counterweights (32a, 32b), be provided for seriatim car (31a, 31b);

Cable (45a, 45b), with car (31a, 31b) (32a 32b) connects into rightly, and they is suspended in the vertical shaft (30) with corresponding counterweight; With

A plurality of towing machines (41a, 41b), cable (45a one of 45b) reels around described towing machine, thus make car (31a, 31b) and corresponding counterweight (32a, 32b) to moving along vertical shaft (30),

Wherein with car (31a, 31b) the position minimum corresponding towing machine of car (31b) (41b) be arranged on vertical shaft (30) by under part in, and be arranged in the highest part of vertical shaft (30) with the corresponding towing machine of another car (31a) (41a).

3. an elevator device (100b) comprising:

(31a 31b), is arranged in the vertical shaft (30) along vertical direction a plurality of cars, and moves independently in vertical shaft (30);

A plurality of counterweights (32a, 32b), be provided for seriatim car (31a, 31b);

Cable (45a, 45b), with car (31a, 31b) (32a 32b) connects into rightly, and they is suspended in the vertical shaft (30) with corresponding counterweight; With

A plurality of towing machines (41a, 41b), cable (45a one of 45b) reels around described towing machine, thus make car (31a, 31b) and corresponding counterweight (32a, 32b) to moving along vertical shaft (30),

Wherein car (31a, 31b) in the highest car (31a) in position corresponding to counterweight (32a, 32b) the highest counterweight (32a) in the position in;

The towing machine (41a) that drives the highest described car (31a) and the highest counterweight (32a) is arranged in the highest part of vertical shaft (30);

The highest described car (31a) moves to lowest floor from the highest floor;

The highest described counterweight (32a) in the scope at the middle part that is higher than vertical shaft (30), move the highest described car (31a) miles of relative movement 1/2;

Drive the highest described car (31a) car (31b) and the towing machine (41b) of corresponding counterweight (32b) middle part that is arranged on vertical shaft (30) in addition; With

The highest described car (31a) car (31b) and corresponding counterweight (32b) in addition moves in the scope at the middle part that is lower than vertical shaft (30).

4. an elevator device (100c) comprising:

(31a 31b), is arranged in the vertical shaft (30) along vertical direction a plurality of cars, and moves independently in vertical shaft (30);

A plurality of counterweights (32a, 32b), be provided for seriatim car (31a, 31b);

Cable (45a, 45b), with car (31a, 31b) (32a 32b) connects into rightly, and they is suspended in the vertical shaft (30) with corresponding counterweight; With

A plurality of towing machines (41a, 41b), cable (45a one of 45b) reels around described towing machine, thus make car (31a, 31b) and corresponding counterweight (32a, 32b) to moving along vertical shaft (30), described towing machine comprises first and second towing machines at least,

Wherein car (31a, 31b) in the highest car (31a) in position corresponding to counterweight (32a, 32b) the highest counterweight (32a) in the position in;

First towing machine (41a) that drives the highest described car (31a) and the highest counterweight (32a) is arranged in the highest part of vertical shaft (30);

The highest described car (31a) moves to lowest floor from uppermost storey;

The highest described counterweight (32a) in the scope at the middle part that is higher than vertical shaft (30), move the highest described car (31a) miles of relative movement 1/2;

Second towing machine (41b) that drives car (31b) outside the highest described car (31a) and corresponding counterweight (32b) is arranged on the middle part of vertical shaft (30); With

Other car (31b) outside the highest described car (31a) and corresponding counterweight (32b) move in the scope at the middle part that is lower than vertical shaft (30).

Elevator device 5. as claimed in claim 2 (100,100a), it is characterized in that (41a 41b) is arranged on that (31a is 31b) in the corresponding part in the space between the zone of process with the vertical wall of vertical shaft (30) and car to towing machine.

6. (100b 100c), is characterized in that, (41a 41b) is arranged on that (31a is 31b) in the corresponding part in the space between the zone of process with the vertical wall of vertical shaft (30) and car to towing machine as claim 3 or 4 described elevator devices.

As each described elevator device among the claim 1-4 (100,100a, 100b, 100c), it is characterized in that, as car (31a, the highest car (31a) in position is parked in lowest floor (FL) when locating 31b), and another car (31b) rests in the vertical shaft (30) that is lower than lowest floor.

8. as claim 1,2 or 5 described elevator devices (100,100a), it is characterized in that, as car (31a, the minimum car (31b) in position stops at uppermost storey (FH) when locating 31b), and another car (31a) rests in the vertical shaft (30) that is higher than uppermost storey.

As claim 1,2 or 5 described elevator devices (100,100a), it is characterized in that the highest car (31a) in position has the top guide pulley (35) that is positioned at the top;

Be wound on described top guide pulley (35) on every side with the corresponding cable of the highest described car (31a) (45a);

The highest described car (31a) other car (31b) in addition has the lower guide pulley (36) that is positioned at the bottom; With

Be wound on described lower guide pulley (36) on every side with the highest described car (31a) the corresponding cable of car (31b) (45b) in addition.

10. (100b 100c), is characterized in that, the car (31b) outside the highest described car (31a) has the lower guide pulley (36) that is positioned at the bottom as claim 3 or 4 described elevator devices; With

Be wound on described lower guide pulley (36) on every side with the corresponding cable of car (31b) (45b) outside the highest described car (31a).

11. as each described elevator device among the claim 1-4 (100,100a, 100b 100c), is characterized in that, the highest car (31a) in position has bumper (51); Described bumper (51) makes the side process of the cable (45b) of the car (31b) outside the suspension the highest described car (31a) along the highest described car (31a), and the vibrations of restriction cable (45b).

12. as claim 1,2 or 5 described elevator devices, it is characterized in that,

The highest counterweight (32a) in position has bumper (50); Described bumper makes the cable (45b) that hangs the counterweight (32b) outside the highest described counterweight (32a) the side process along the highest described counterweight (32a), and the swing width of described bumper (50) restriction cable (45b).

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