EP1593640B1 - Elevator equipment - Google Patents
Elevator equipment Download PDFInfo
- Publication number
- EP1593640B1 EP1593640B1 EP03705095A EP03705095A EP1593640B1 EP 1593640 B1 EP1593640 B1 EP 1593640B1 EP 03705095 A EP03705095 A EP 03705095A EP 03705095 A EP03705095 A EP 03705095A EP 1593640 B1 EP1593640 B1 EP 1593640B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- counterweight
- hoisting
- hoistway
- main rope
- hoisting machines
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/0035—Arrangement of driving gear, e.g. location or support
- B66B11/0045—Arrangement of driving gear, e.g. location or support in the hoistway
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/0035—Arrangement of driving gear, e.g. location or support
- B66B11/0045—Arrangement of driving gear, e.g. location or support in the hoistway
- B66B11/0055—Arrangement of driving gear, e.g. location or support in the hoistway on the counterweight
Definitions
- the present invention relates to a traction-type elevator system wherein a hoisting device is used, and particularly to an elevator system wherein the hosting device is mounted on a counterweight.
- JP 2000 255 932 A discloses an elevator which is capable of reducing the size of a hoistway with respect to earlier elevators.
- the electric motor of the axial gap type is provided so that the stator and the rotor face each other in the direction of the rotation axis of the rotor via an air gap; and for example, in Japanese non-examined laid-open patent publication No. Hei 7-137963 , an elevator system wherein a hoisting machine using this axial gap type electric motor is mounted on the counterweight, is disclosed.
- the radial gap type electric motor is mounted so that the stator and the rotor face each other in the direction vertical to the direction of the rotation axis of the rotor via an air gap; and conventionally, also this radial gap type electric motor has been used in hoisting machines.
- the external form of the hoisting machine i.e. the radial diameter and the thickness of the hoisting machine in the direction of the rotation axis of the drive sheave of the hoisting machine become large.
- the radial gap type electric motor in the case where the torque of the electric motor used for the hoisting machine is to be increased, generally, the thickness of the rotor and the stator in the direction of the rotation axis of the rotor are increased. In accordance with this, the thickness of the hoisting machine in the direction of the rotation axis of the drive sheave becomes large.
- the hoisting machine even if an electric motor of the axial gap type or the radial gap type is used, in order to increase the torque of the hoisting machine according to the increase in capacity of the elevator, the hoisting machine will not fit inside the frame body of the counterweight unless the dimensions of the frame body of the counterweight are not increased, because of the enlargement of the hoisting machine. As a result of this, there is a problem that the space required inside the hoistway is enlarged according to the increase in the area of the horizontal projection view of the hoistway.
- the present invention was devised to solve the above-mentioned problems, and has as its intension to provide an elevator system capable to cope with increase to large capacity of the elevator without causing enlargement of the area of the horizontal projection view of the hoistway, i.e. the space required for the hoistway in a building, wherein the hoisting machine is mounted on the counterweight in an elevator.
- the elevator system in the present invention comprises an elevator car which ascends and descends through the hoistway, a counterweight which travels in the direction opposite to the elevator car, and a main rope which suspends the elevator car and the counterweight; and the elevator car and the counterweight are driven by a hoisting device around which the main rope is passed.
- the hoisting machines used in the hoisting device comprises a drive sheave around which the main rope is passed and an electric motor which drives the drive sheave to rotate.
- the hoisting device comprises at least two of these hoisting machines, and at least one thereof is mounted on the counterweight.
- an elevator capable to correspond to the elevator's increase to large capacity without causing enlargement of the area of the horizontal projection view of the hoistway, i.e. the space required for the hoistway in a building. Also, it is possible to serialize with facility elevators of capacities of small ranges to large ranges by simply adjusting the number of hoisting machines by construction using hoisting machines of the same specifications.
- Figure 1 is a diagram showing an example of an arrangement of the elevator system in accordance with the first embodiment of the present invention; and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the elevator main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway.
- Figure 2 is a plan view of the elevator system in accordance with Figure 1 ; and in Figure 2 , illustration of the deflector sheave and the main rope is omitted because the drawing is used mainly as a drawing to explain the arrangement of the hoisting device mounted on the counterweight and the arrangement of the relation between the elevator car and the counterweight.
- a hoisting device 10 around which a main rope 9 is passed and which drives the elevator car 4 and the counterweight 3 is mounted on the counterweight 3.
- the hoisting device 10 is comprised of two hoisting machines 11; and the torque required for driving the elevator is shared between the two hoisting machines 11.
- Each of the hoisting machines 11 has a drive sheave 12 around which the main rope 9 is passed, and an electric motor 13 which drives the drive sheave 12 to rotate; and the thickness D in the direction of the rotation axis of the drive sheave 12 is formed so as to be smaller than the dimension C in the direction of the external diameter.
- the two hoisting machines 11 are mounted inside the frame body of the counterweight 3 which constructs the external form thereof so as to overlap each other not in the horizontal direction, but in the vertical direction.
- the form of the section of the counterweight 3 in the horizontal direction is short in the direction of the gap between the car 4 and the wall surface 1a; and the counterweight 3 has a long rectangular section in the width direction of the car 4 and also a rectangular parallelpiped external form which is formed long in the vertical direction. That is, the counterweight 3 is arranged so as to take up as little space as possible in the horizontal projection view of the hoistway 1.
- the external form of the counterweight 3 is constructed of a frame body; and a weight for the counterweight is mounted in a lower part of the frame body.
- the hoisting device 10 in the first embodiment has the two hoisting machines 11 mounted so as to overlap each other in the vertical direction so that the dimension A (also referred to as the width A of the counterweight 3 in the present invention) in the longitudinal direction of the counterweight 3 in the horizontal projection view of the hoistway 1 does not widen.
- the hoisting device 10 is mounted on the counterweight 3 with the direction in the thickness of the hoisting machine 11 matching the short-side direction of the counterweight 3, so that the dimension B (also referred to as the thickness B of the counterweight 3 in the present invention) which crosses the above-mentioned dimension A orthogonally does not widen.
- the hoisting device 10 is constructed of two hoisting machines 11 of the same specifications.
- both ends of the main rope 9 are fixed to an upper part of the hoistway 1; and starting at the upper part of the hoistway 1, one end of the main rope 9 is successively passed around the two hoisting machines 11, then around the deflector sheave 8 for the counterweight which is mounted on the counterweight 3 with the intention of increasing the winding amount of the main rope 9 to the hoisting machines 11, and then rises and is passed around two upper-hoistway deflector sheaves 7 which are provided in an upper part of the hoistway 1. Furthermore, the main rope 9 is successively passed around a pair of suspension sheaves 6 for the car that are provided in a lower part of the elevator car 4 and rises again; and the other end of the main rope 9 is fixed to the upper part of the hoistway 1.
- the main rope 9, which is comprised of a plurality of ropes has only one route, and is successively passed on around the two hoisting machines 11.
- the hoisting device 10 comprises two hoisting machines 11, it is possible to share the torque required for driving the elevator between the two hoisting machines 11.
- the hoisting device 10 in order to cope with elevators of which the load of the elevator car is further increased, i.e. elevators of large capacity, it has been necessary to enlarge the hoisting machine in order to gain the torque necessary for driving the elevator; however, in contrast, as for the hoisting device 10 in the first embodiment, it is not necessary to enlarge the external form of each of the hoisting machines 11.
- the two hoisting machines 11 are mounted inside the frame body of the counterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction.
- hoisting machines 11 using an electric motor 13 of the radial gap type it is possible to control increase in the thickness D in the direction of the rotation axis of the drive sheave 12, and it is unnecessary to widen the thickness B of the counterweight 3.
- hoisting machines 11 using an electric motor 13 of the axial gap type it is possible to control increase in dimension C in the direction of the external diameter and the thickness D in the direction of the rotation axis of the drive sheave of the hoisting machine, so it is unnecessary to widen the width A or the thickness B of the counterweight 3. Accordingly, by using either type of electric motor 13 , it is possible to cope with elevators with increased capacity without enlarging the horizontal projection area of the hoistway.
- Figure 3 is a diagram showing an example of an arrangement of the elevator system in accordance with the second embodiment of the present invention. and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway.
- a hoisting device 10 which comprises two hoisting machines 11 is mounted on the counterweight 3; and the two hoisting machines 11 are mounted inside the frame body of the counterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction. That is, also in this case, two hoisting machines 11 are provided so that there is no necessity to enlarge the width A or the thickness B of the counterweight 3.
- the main rope 9 has only one route, and is successively passed on around the two hoisting machines 11.
- the only difference between the first embodiment and the second embodiment is the manner that the main rope 9 is passed around the hoisting machines 11 and the arrangement of the deflector sheave 8 for the counterweight in accordance with the manner of passing of the main rope 9. That is, while in the first embodiment the deflector sheave 8 for the counterweight is provided after the main rope 9, of which one end is fixed at an upper part of the hoistway 1, is successively passed around the two hoisting machines 11, in the second embodiment, the deflector sheave 8 for the counterweight is provided between the two hoisting machines 11 which are on the route of the main rope 9.
- the hoisting device 10 is comprised of two hoisting machines 11; and the torque required for driving the elevator can be shared between the two hoisting machines 11. For this reason, there is no necessity to enlarge the external form of each of the hoisting machines 11 to adapt to elevators of large capacity. Furthermore, the two hoisting machines 11 are mounted inside the frame body of the counterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction.
- Figure 4 is a diagram showing an example of an arrangement of the elevator system in accordance with the third embodiment of the present invention. and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway.
- a hoisting device 10 which comprises two hoisting machines 11 is mounted on the counterweight 3; and the two hoisting machines 11 are mounted inside the frame body of the counterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction. That is, also in this case, two hoisting machines 11 are provided so that there is no necessity to enlarge the width A or the thickness B of the counterweight 3.
- the main rope 9 used in the third embodiment is comprised of two sets of main rope units 9a and 9b, which are both comprised of a plurality of ropes.
- One end of the main rope unit 9a is fixed to an upper part of the hoistway 1; and the main rope unit 9a is passed around one of the two hoisting machines 11, and stretches to the upper-hoistway deflector sheaves 7.
- the main rope unit 9a is passed on around a pair of suspension sheaves 6 for the car which are provided below the elevator car 4, and rises again; and the other end of the main rope unit 9a is fixed to an upper part of the hoistway 1.
- One end of the other main rope unit 9b is also fixed to an upper part of the hoistway 1; however, next, the main rope unit 9b is passed around the other one of the two hoisting machines 11.
- the subsequent route is the same as that of the main rope unit 9a, thus explanation will be omitted.
- the two sets of main rope units 9a and 9b are equipped in parallel with each other, and are passed around separate hoisting machines.
- the other structures and the motions thereof are the same as the first and second embodiments, so the same numerals are given to the same parts or the corresponding parts, and repeated explanation is omitted.
- the hoisting device 10 is comprised of two hoisting machines 11; and it is possible to share the torque required for driving the elevator between the two hoisting machines 11. For this reason, there is no necessity to enlarge the external form of each of the hoisting machines 11 to adapt to elevators of large capacity. Furthermore, the two hoisting machines 11 are mounted inside the frame body of the counterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction.
- Figure 5 is a diagram showing an example of an arrangement of the elevator system in accordance with the fourth embodiment of the present invention. and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway.
- a hoisting device 10 comprising two hoisting machines 11 is mounted on the counterweight 3; and the two hoisting machines 11 are mounted inside the frame body of the counterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction. That is, also in this case, two hoisting machines 11 are provided so that there is no necessity to enlarge the width A or the thickness B of the counterweight 3.
- the main rope 9 used also in the fourth embodiment is similar to that used in the third embodiment, and is comprised of two sets of main rope units 9a and 9b which are both comprised of a plurality of ropes.
- the fourth embodiment is different from the third embodiment on the point that a deflector sheave 8 for the counterweight is used on the route of one of the main rope units 9a.
- deflector sheave 8 for the counterweight By using deflector sheave 8 for the counterweight in this manner, it is possible to raise freedom of the fixing position of the main rope 9 in the upper part of the hoistway 1 in the horizontal direction and the mounting position of the hoisting machines 11 inside the counterweight 3.
- the other structures and the motions thereof are the same as the first and the other embodiments, so the same numerals are given to the same parts or the corresponding parts, and repeated explanation is omitted.
- the hoisting device 10 is comprised of two hoisting machines 11; and the torque required for driving the elevator can be shared between the two hoisting machines 11. For this reason, there is no necessity to enlarge the external form of each of the hoisting machines 11 to adapt to elevators of large capacity. Furthermore, the two hoisting machines 11 are mounted inside the frame body of the counterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction.
- Figure 6 is a diagram showing an example of an arrangement of the elevator system in accordance with the fifth embodiment of the present invention. and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway.
- a hoisting device 10 comprising two hoisting machines 11 is mounted on the counterweight 3.
- the two hoisting machines 11 are mounted inside the frame body of the counterweight 3 so as to overlap each other in the horizontal direction, but not in the vertical direction. That is, the two hoisting machines 11 are parallelly provided in the horizontal direction.
- the main rope 9 has only one route; and a deflector sheave 8 for the counterweight is arranged between the two hoisting machines 11 on the route of the main rope 9.
- One end of the main rope 9 is fixed to an upper part of the hoistway 1; and the main rope 9 is passed around in the order of: one of the hoisting machines 11, the deflector sheave 8 for the counterweight, and the other hoisting machine 11;and then stretches to the upper-hoistway deflector sheaves 7.
- the main rope 9 After being passed around the two upper-hoistway deflector sheaves 7, the main rope 9 is passed around a pair of suspension sheaves 6 for the car which are provided below the elevator car 4, and rises again; and the other end of the main rope 9 is fixed to an upper part of the hoistway 1.
- the other structures and the motions thereof are the same as the first and the other embodiments, so the same numerals are given to the same parts or the corresponding parts, and repeated explanation is omitted.
- the hoisting device 10 is comprised of two hoisting machines 11; and it is possible to share the torque required for driving the elevator between the two hoisting machines 11. For this reason, there is no necessity to enlarge the external form of each of the hoisting machines 11 to adapt to elevators of large capacity. Furthermore, compared with the first to the fourth embodiments, because the two hoisting machines 11 are arranged parallelly in the horizontal direction, although the width A of the counterweight 3 increases, arrangement wherein the wasted gap inside the frame body of the counterweight 3 is decreased in the horizontal direction can be realized.
- Figure 7 is a diagram showing an example of an arrangement of the elevator system in accordance with the sixth embodiment of the present invention. and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway.
- a hoisting device 10 which comprises two hoisting machines 11 is mounted on the counterweight 3; and the two hoisting machines 11 are mounted inside the frame body of the counterweight 3 so as to overlap each other in the horizontal direction, but not in the vertical direction.
- the main rope 9 used in the sixth embodiment is comprised of two sets of main rope units 9a and 9b which are both comprised of a plurality of ropes.
- One end of the main rope unit 9a is fixed to an upper part of the hoistway 1; and the main rope unit 9a is passed around one of the two hoisting machines 11, and stretches to the upper-hoistway deflector sheaves 7.
- the main rope unit 9a is passed on around a pair of suspension sheaves 6 for the car which are provided below the elevator car 4, and rises again; and the other end of the main rope unit 9a is fixed to an upper part of the hoistway 1.
- One end of the other main rope unit 9b is also fixed to an upper part of the hoistway 1; however, next, the main rope unit 9b is passed around the other one of the two hoisting machines 11.
- the subsequent route is the same as that of the main rope unit 9a, thus explanation will be omitted.
- the two sets of main rope units 9a and 9b are equipped parallelly with each other, and are passed around separate hoisting machines.
- the other structures and the motions thereof are the same as the first and the other embodiments, so the same numerals are given to the same parts or the corresponding parts, and repeated explanation is omitted.
- the hoisting device 10 is comprised of two hoisting machines 11; and it is possible to share the torque required for driving the elevator between the two hoisting machines 11. For this reason, there is no necessity to enlarge the external form of each of the hoisting machines 11 to adapt to elevators of large capacity. Furthermore, compared with the first to the fourth embodiments, because the two hoisting machines 11 are arranged parallelly in the horizontal direction, although the width A of the counterweight 3 increases, arrangement wherein the wasted gap inside the frame body of the counterweight 3 is decreased in the horizontal direction can be realized.
- Figure 8 is a diagram showing an example of an arrangement of the elevator system in accordance with the seventh embodiment of the present invention. and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway.
- the hoisting device 10 comprises two hoisting machines 11.
- one of the hoisting machines 11 is mounted on the counterweight 3, and the other hoisting machine 11 is provided in an upper part of the hoistway 1 so as to overlap the counterweight 3 when viewed from the vertical direction. That is, this hoistingmachine 11 is provided above the travel area of the counterweight 3 which ascends and descends being guided by the guiderails 2 for the counterweight, and between the pair of guiderails 2 , which face each other. Accordingly, also in this case, two hoisting machines 11 are provided so that there is no necessity to widen the width A or the thickness B of the counterweight 3.
- the main rope 9 used in the seventh embodiment has only one route.
- One end of the main rope 9 is fixed to an upper part of the hoistway 1, and the main rope 9 is longitudinally passed on around the two hoisting machines 11, and stretches to the upper-hoistway deflector sheaves 7.
- the main rope 9 is passed on around a pair of suspension sheaves 6 for the car which are provided below the elevator car, and rises again; and the other end of the main rope 9 is fixed to an upper part of the hoistway 1.
- the other structures and the motions thereof are the same as the first and the other embodiments, so the same numerals are given to the same parts or the corresponding parts, and repeated explanation is omitted.
- the hoisting device 10 is comprised of two hoisting machines 11; and it is possible to share the torque required for driving the elevator between the two hoisting machines 11. For this reason, there is no necessity to enlarge the external form of each of the hoisting machines 11 to adapt to elevators of large capacity.
- the two hoisting machines 11 are mounted inside the frame body of the counterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction. Accordingly, with a hoisting device 10 using either the axial gap type or the radial gap type of electric motor 13, it is possible to cope with elevators with increased capacity without enlarging the horizontal projection area of the hoistway, because it is not necessary to enlarge the width A or the thickness B of the counterweight 3.
- the hoisting device 10 comprises two hoisting machines 11
- the number of hoisting machines 11 does not necessarily have to be two; and it is sufficient to mount at least one hoisting machine 11 on the counterweight 3, and the remaining plurality of hoisting machines 11 can be either mounted on the counterweight 3 or provided in an upper part of the hoistway 1. Accordingly, by constructing the hoisting device 10 using N hoisting machines 11 of the same specifications, it is possible to cope with elevators of the capacity of N times without increasing the width A or the thickness B of the counterweight 3.
- the hoisting device 10 is comprised of two hoisting machines 11 of the same specifications; however, the plurality of hoisting machines can also be of different specifications; for example, a combination of hoisting machines of different capacities.
- the elevator system in accordance with the present invention enables structure of an elevator which can cope with increase in capacity of the elevator without enlargement in the horizontal projection area of the hoistway, i.e. increase in the space required for the hoistway in a building. Furthermore, by constructing the elevator by using a plurality of hoisting machines of the same specifications, it is able to serialize with facility elevators of capacities of small ranges to large ranges by just adjusting the number of hoisting machines. Accordingly, the present invention is useful as an elevator system which is excellent in productivity and installability and which can cope with increase in capacity of the elevator without eliminating the merits of an elevator of the space-saving type having a hoisting device mounted on counterweight.
Description
- The present invention relates to a traction-type elevator system wherein a hoisting device is used, and particularly to an elevator system wherein the hosting device is mounted on a counterweight.
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JP 2000 255 932 A - With a view to reduce the required space in the hoistway of an elevator as much as possible, there have been suggested elevator systems wherein a thin-shaped hoisting machine that can be housed in the frame body of the counterweight is mounted on the counterweight. Since hoisting machines to be used in elevator systems of this type generally require an electric motor which is small in thickness and comparatively large in capacity, electric motors of the axial gap type or the radial gap type using a permanent magnet having the rotation axis of the rotor provided on the same axis as the rotation axis of the drive sheave of the hoisting machine are used. Here, the electric motor of the axial gap type is provided so that the stator and the rotor face each other in the direction of the rotation axis of the rotor via an air gap; and for example, in Japanese non-examined laid-open patent publication No.
Hei 7-137963 - In an elevator system wherein the hoisting machine is mounted on the counterweight as above-mentioned, in order to realize an elevator wherein the load of the elevator car is further increased, e.g. to provide an elevator of large capacity, it is necessary to enlarge the hoisting machine. Here, in order to enlarge the torque of the electric motor used in the hoisting machine, as for the axial gap type electric motor, generally the diameter of the air gap between the stator and the rotor is increased; however, as a result, the diameter of the electric motor becomes large, and there is a tendency that also the thickness of the electric motor in the direction of the rotation axis of the rotor becomes large due to the enlargement of the bearing which supports the rotor. Accordingly, the external form of the hoisting machine, i.e. the radial diameter and the thickness of the hoisting machine in the direction of the rotation axis of the drive sheave of the hoisting machine become large. Also, as for the radial gap type electric motor, in the case where the torque of the electric motor used for the hoisting machine is to be increased, generally, the thickness of the rotor and the stator in the direction of the rotation axis of the rotor are increased. In accordance with this, the thickness of the hoisting machine in the direction of the rotation axis of the drive sheave becomes large.
- According to the aforementioned, even if an electric motor of the axial gap type or the radial gap type is used, in order to increase the torque of the hoisting machine according to the increase in capacity of the elevator, the hoisting machine will not fit inside the frame body of the counterweight unless the dimensions of the frame body of the counterweight are not increased, because of the enlargement of the hoisting machine. As a result of this, there is a problem that the space required inside the hoistway is enlarged according to the increase in the area of the horizontal projection view of the hoistway.
- Furthermore, in the case where one hoisting machine is provided inside the frame body of the counterweight, in order to make the hoisting machine adapt to the increase in the capacity of the elevator, hoisting machines of sizes corresponding to each of the ranges of the capacities of the elevators are needed. Moreover, in order to make one hoisting machine correspond to small ranges to large ranges of the capacities of the elevators, it is necessary to standardize the hoisting machine to a large and costly hoisting machine corresponding to all ranges of capacities, thus making it meaningless.
- The present invention was devised to solve the above-mentioned problems, and has as its intension to provide an elevator system capable to cope with increase to large capacity of the elevator without causing enlargement of the area of the horizontal projection view of the hoistway, i.e. the space required for the hoistway in a building, wherein the hoisting machine is mounted on the counterweight in an elevator.
- The elevator system in the present invention comprises an elevator car which ascends and descends through the hoistway, a counterweight which travels in the direction opposite to the elevator car, and a main rope which suspends the elevator car and the counterweight; and the elevator car and the counterweight are driven by a hoisting device around which the main rope is passed. The hoisting machines used in the hoisting device comprises a drive sheave around which the main rope is passed and an electric motor which drives the drive sheave to rotate. The hoisting device comprises at least two of these hoisting machines, and at least one thereof is mounted on the counterweight.
- Also, it is structured so that all the hoisting machines are mounted on the counterweight.
- Furthermore, it is structured so that at least one of the other hoisting machines of the hoisting device is provided in an upper part of the hoistway.
- According to the aforementioned invention, it is possible to construct an elevator capable to correspond to the elevator's increase to large capacity without causing enlargement of the area of the horizontal projection view of the hoistway, i.e. the space required for the hoistway in a building. Also, it is possible to serialize with facility elevators of capacities of small ranges to large ranges by simply adjusting the number of hoisting machines by construction using hoisting machines of the same specifications.
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Figure 1 is a diagram showing an example of an arrangement of the elevator system in accordance with the first embodiment of the present invention; -
Figure 2 is a plan view of the elevator system in accordance withFigure 1 ; -
Figure 3 is a diagram showing an example of an arrangement of the elevator system in accordance with the second embodiment of the present invention; -
Figure 4 is a diagram showing an example of an arrangement of the elevator system in accordance with the third embodiment of the present invention; -
Figure 5 is a diagram showing an example of an arrangement of the elevator system in accordance with the fourth embodiment of the present invention; -
Figure 6 is a diagram showing an example of an arrangement of the elevator system in accordance with the fifth embodiment of the present invention; -
Figure 7 is a diagram showing an example of an arrangement of the elevator system in accordance with the sixth embodiment of the present invention; and -
Figure 8 is a diagram showing an example of an arrangement of the elevator system in accordance with the seventh embodiment of the present invention. - To describe the present invention in more detail, the invention will be described by referring to the accompanying drawings. In each of the drawings, the same numerals are given to the same parts or the corresponding parts, and repeated explanation will be appropriately simplified or omitted.
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Figure 1 is a diagram showing an example of an arrangement of the elevator system in accordance with the first embodiment of the present invention; and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the elevator main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway. -
Figure 2 is a plan view of the elevator system in accordance withFigure 1 ; and inFigure 2 , illustration of the deflector sheave and the main rope is omitted because the drawing is used mainly as a drawing to explain the arrangement of the hoisting device mounted on the counterweight and the arrangement of the relation between the elevator car and the counterweight. - In
Figure 1 andFigure 2 , in thehoistway 1, there are provided a pair ofguiderails 2 for the counterweight, and another pair of guiderails (not shown) for the elevator car respectively. Thecounterweight 3 ascends and descends thehoistway 1 being guided by theguiderails 2 for the counterweight. Theelevator car 4 ascends and descends thehoistway 1 in the direction opposite to thecounterweight 3 being guided by the guiderails for the elevator car. Furthermore, on theelevator car 4 there are providedentrance doors 5; and the surface having theentrance doors 5 is treated as the front face of thecar 4. Thecounterweight 3 is provided between the back face of theelevator car 4 which is opposite to the front face of thecar 4, and thewall surface 1a of thehoistway 1. Thecounterweight 3 can also be arranged between either of the side faces of theelevator car 4 which are orthogonal to the front face of theelevator car 4, and thewall surface 1a of thehoistway 1. - Next: a hoisting
device 10 around which amain rope 9 is passed and which drives theelevator car 4 and thecounterweight 3 is mounted on thecounterweight 3. The hoistingdevice 10 is comprised of twohoisting machines 11; and the torque required for driving the elevator is shared between the twohoisting machines 11. Each of the hoistingmachines 11 has adrive sheave 12 around which themain rope 9 is passed, and anelectric motor 13 which drives thedrive sheave 12 to rotate; and the thickness D in the direction of the rotation axis of thedrive sheave 12 is formed so as to be smaller than the dimension C in the direction of the external diameter. - Next: the two
hoisting machines 11 are mounted inside the frame body of thecounterweight 3 which constructs the external form thereof so as to overlap each other not in the horizontal direction, but in the vertical direction. To describe further, as shown inFigure 2 , generally, the form of the section of thecounterweight 3 in the horizontal direction is short in the direction of the gap between thecar 4 and thewall surface 1a; and thecounterweight 3 has a long rectangular section in the width direction of thecar 4 and also a rectangular parallelpiped external form which is formed long in the vertical direction. That is, thecounterweight 3 is arranged so as to take up as little space as possible in the horizontal projection view of thehoistway 1. Also, the external form of thecounterweight 3 is constructed of a frame body; and a weight for the counterweight is mounted in a lower part of the frame body. In thecounterweight 3 shown inFigure 1 (and in the remaining drawings), illustration of the weight for the counterweight is omitted; and the external form of thecounterweight 3 in the drawings show the external form of the frame body. Accordingly, the hoistingdevice 10 in the first embodiment has the two hoistingmachines 11 mounted so as to overlap each other in the vertical direction so that the dimension A (also referred to as the width A of thecounterweight 3 in the present invention) in the longitudinal direction of thecounterweight 3 in the horizontal projection view of thehoistway 1 does not widen. Also, the hoistingdevice 10 is mounted on thecounterweight 3 with the direction in the thickness of the hoistingmachine 11 matching the short-side direction of thecounterweight 3, so that the dimension B (also referred to as the thickness B of thecounterweight 3 in the present invention) which crosses the above-mentioned dimension A orthogonally does not widen. In the first embodiment, the hoistingdevice 10 is constructed of twohoisting machines 11 of the same specifications. - Next: both ends of the
main rope 9 are fixed to an upper part of thehoistway 1; and starting at the upper part of thehoistway 1, one end of themain rope 9 is successively passed around the twohoisting machines 11, then around thedeflector sheave 8 for the counterweight which is mounted on thecounterweight 3 with the intention of increasing the winding amount of themain rope 9 to the hoistingmachines 11, and then rises and is passed around two upper-hoistway deflector sheaves 7 which are provided in an upper part of thehoistway 1. Furthermore, themain rope 9 is successively passed around a pair ofsuspension sheaves 6 for the car that are provided in a lower part of theelevator car 4 and rises again; and the other end of themain rope 9 is fixed to the upper part of thehoistway 1. In the first embodiment of the present invention, themain rope 9, which is comprised of a plurality of ropes, has only one route, and is successively passed on around the two hoistingmachines 11. - According to the aforementioned first embodiment, because the hoisting
device 10 comprises twohoisting machines 11, it is possible to share the torque required for driving the elevator between the twohoisting machines 11. Conventionally, in order to cope with elevators of which the load of the elevator car is further increased, i.e. elevators of large capacity, it has been necessary to enlarge the hoisting machine in order to gain the torque necessary for driving the elevator; however, in contrast, as for the hoistingdevice 10 in the first embodiment, it is not necessary to enlarge the external form of each of thehoisting machines 11. Moreover, the two hoistingmachines 11 are mounted inside the frame body of thecounterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction. In accordance with this, as for hoistingmachines 11 using anelectric motor 13 of the radial gap type, it is possible to control increase in the thickness D in the direction of the rotation axis of thedrive sheave 12, and it is unnecessary to widen the thickness B of thecounterweight 3. Also, as for hoistingmachines 11 using anelectric motor 13 of the axial gap type, it is possible to control increase in dimension C in the direction of the external diameter and the thickness D in the direction of the rotation axis of the drive sheave of the hoisting machine, so it is unnecessary to widen the width A or the thickness B of thecounterweight 3. Accordingly, by using either type ofelectric motor 13 , it is possible to cope with elevators with increased capacity without enlarging the horizontal projection area of the hoistway. - Moreover, by adopting two hoisting
machines 11 of the same specifications as hoistingmachines 11 of thehoisting device 10, productivity and installability of thehoistingmachines 11 are improved. For this reason, in the case where the capacity of the elevator is to be further increased, it is possible to cope by increasing the number ofhoisting machines 11 of the same specifications. That is, it is able to serialize with facility elevators of capacities of small ranges to large ranges by simply adjusting the number of hoisting machines. -
Figure 3 is a diagram showing an example of an arrangement of the elevator system in accordance with the second embodiment of the present invention; and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway. - As shown in
Figure 3 , in the second embodiment, similarly to the first embodiment, ahoisting device 10 which comprises two hoistingmachines 11 is mounted on thecounterweight 3; and the twohoisting machines 11 are mounted inside the frame body of thecounterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction. That is, also in this case, two hoistingmachines 11 are provided so that there is no necessity to enlarge the width A or the thickness B of thecounterweight 3. Themain rope 9 has only one route, and is successively passed on around the twohoisting machines 11. - Here, the only difference between the first embodiment and the second embodiment is the manner that the
main rope 9 is passed around thehoisting machines 11 and the arrangement of thedeflector sheave 8 for the counterweight in accordance with the manner of passing of themain rope 9. That is, while in the first embodiment thedeflector sheave 8 for the counterweight is provided after themain rope 9, of which one end is fixed at an upper part of thehoistway 1, is successively passed around the twohoisting machines 11, in the second embodiment, thedeflector sheave 8 for the counterweight is provided between the twohoisting machines 11 which are on the route of themain rope 9. In this manner, it is possible to select a suitable arrangement location for thehoisting device 10 according to the situation in setting thehoisting machines 11 on thecounterweight 3 by changing the arrangement location of thedeflector sheave 8 for the counterweight. The other structures and the motions thereof are the same as the first embodiment, so the same numerals are given to the same parts or the corresponding parts, and repeated explanation is omitted. - Also in the aforementioned second embodiment, the hoisting
device 10 is comprised of two hoistingmachines 11; and the torque required for driving the elevator can be shared between the twohoisting machines 11. For this reason, there is no necessity to enlarge the external form of each of thehoisting machines 11 to adapt to elevators of large capacity. Furthermore, the twohoisting machines 11 are mounted inside the frame body of thecounterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction. Accordingly, with ahoisting device 10 using either the axial gap type or the radial gap type ofelectric motor 13, it is possible to cope with elevators with increased capacity without enlarging the horizontal projection area of the hoistway, because it is not necessary to enlarge the width A or the thickness B of thecounterweight 3. - In addition to this, the same effects as the first embodiment can be attained.
-
Figure 4 is a diagram showing an example of an arrangement of the elevator system in accordance with the third embodiment of the present invention; and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway. - As shown in
Figure 4 , in the third embodiment, similarly to the first and second embodiments, ahoisting device 10 which comprises two hoistingmachines 11 is mounted on thecounterweight 3; and the twohoisting machines 11 are mounted inside the frame body of thecounterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction. That is, also in this case, two hoistingmachines 11 are provided so that there is no necessity to enlarge the width A or the thickness B of thecounterweight 3. - Next: the
main rope 9 used in the third embodiment is comprised of two sets ofmain rope units main rope unit 9a is fixed to an upper part of thehoistway 1; and themain rope unit 9a is passed around one of the twohoisting machines 11, and stretches to the upper-hoistway deflector sheaves 7. Then, after being passed around the two upper-hoistway deflector sheaves 7, themain rope unit 9a is passed on around a pair ofsuspension sheaves 6 for the car which are provided below theelevator car 4, and rises again; and the other end of themain rope unit 9a is fixed to an upper part of thehoistway 1. One end of the othermain rope unit 9b is also fixed to an upper part of thehoistway 1; however, next, themain rope unit 9b is passed around the other one of the twohoisting machines 11. The subsequent route is the same as that of themain rope unit 9a, thus explanation will be omitted. Accordingly, the two sets ofmain rope units - Also in the aforementioned third embodiment , the hoisting
device 10 is comprised of two hoistingmachines 11; and it is possible to share the torque required for driving the elevator between the twohoisting machines 11. For this reason, there is no necessity to enlarge the external form of each of thehoisting machines 11 to adapt to elevators of large capacity. Furthermore, the twohoisting machines 11 are mounted inside the frame body of thecounterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction. Accordingly, with ahoisting device 10 using either the axial gap type or the radial gap type ofelectric motor 13, it is possible to cope with elevators with increased capacity without enlarging the horizontal projection area of the hoistway, because it is not necessary to enlarge the width A or the thickness B of thecounterweight 3. - In addition to this, the same effects as the first and the other embodiments can be attained.
-
Figure 5 is a diagram showing an example of an arrangement of the elevator system in accordance with the fourth embodiment of the present invention; and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway. - As shown in
Figure 5 , in the fourth embodiment, similarly to the third embodiment, ahoisting device 10 comprising two hoistingmachines 11 is mounted on thecounterweight 3; and the twohoisting machines 11 are mounted inside the frame body of thecounterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction. That is, also in this case, two hoistingmachines 11 are provided so that there is no necessity to enlarge the width A or the thickness B of thecounterweight 3. Themain rope 9 used also in the fourth embodiment is similar to that used in the third embodiment, and is comprised of two sets ofmain rope units - Here, the fourth embodiment is different from the third embodiment on the point that a
deflector sheave 8 for the counterweight is used on the route of one of themain rope units 9a. By usingdeflector sheave 8 for the counterweight in this manner, it is possible to raise freedom of the fixing position of themain rope 9 in the upper part of thehoistway 1 in the horizontal direction and the mounting position of thehoisting machines 11 inside thecounterweight 3. The other structures and the motions thereof are the same as the first and the other embodiments, so the same numerals are given to the same parts or the corresponding parts, and repeated explanation is omitted. - Also in the aforementioned fourth embodiment, the hoisting
device 10 is comprised of two hoistingmachines 11; and the torque required for driving the elevator can be shared between the twohoisting machines 11. For this reason, there is no necessity to enlarge the external form of each of thehoisting machines 11 to adapt to elevators of large capacity. Furthermore, the twohoisting machines 11 are mounted inside the frame body of thecounterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction. Accordingly, with ahoisting device 10 using either the axial gap type or the radial gap type ofelectric motor 13, it is possible to cope with elevators with increased capacity without enlarging the horizontal projection area of the hoistway, because it is not necessary to enlarge the width A or the thickness B of thecounterweight 3. - In addition to this, the same effects as the first and the other embodiments can be attained.
-
Figure 6 is a diagram showing an example of an arrangement of the elevator system in accordance with the fifth embodiment of the present invention; and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway. - As shown in
Figure 6 , in the fifth embodiment, similarly to the first to the fourth embodiments, ahoisting device 10 comprising two hoistingmachines 11 is mounted on thecounterweight 3. However, in the fifth embodiment, unlike in the first to the fourth embodiments, the twohoisting machines 11 are mounted inside the frame body of thecounterweight 3 so as to overlap each other in the horizontal direction, but not in the vertical direction. That is, the twohoisting machines 11 are parallelly provided in the horizontal direction. - Next: similarly to the second embodiment, the
main rope 9 has only one route; and adeflector sheave 8 for the counterweight is arranged between the twohoisting machines 11 on the route of themain rope 9. One end of themain rope 9 is fixed to an upper part of thehoistway 1; and themain rope 9 is passed around in the order of: one of thehoisting machines 11, thedeflector sheave 8 for the counterweight, and the other hoistingmachine 11;and then stretches to the upper-hoistway deflector sheaves 7. After being passed around the two upper-hoistway deflector sheaves 7, themain rope 9 is passed around a pair ofsuspension sheaves 6 for the car which are provided below theelevator car 4, and rises again; and the other end of themain rope 9 is fixed to an upper part of thehoistway 1. The other structures and the motions thereof are the same as the first and the other embodiments, so the same numerals are given to the same parts or the corresponding parts, and repeated explanation is omitted. - According to the aforementioned fifth embodiment, because the
hoisting device 10 is comprised of two hoistingmachines 11; and it is possible to share the torque required for driving the elevator between the twohoisting machines 11. For this reason, there is no necessity to enlarge the external form of each of thehoisting machines 11 to adapt to elevators of large capacity. Furthermore, compared with the first to the fourth embodiments, because the twohoisting machines 11 are arranged parallelly in the horizontal direction, although the width A of thecounterweight 3 increases, arrangement wherein the wasted gap inside the frame body of thecounterweight 3 is decreased in the horizontal direction can be realized. Accordingly, in the case where the number of hoisting machines are further increased in order to adapt to elevators of large capacity, it is possible to minimize increase in the dimension E of the vertical direction of thecounterweight 3, and to improve volumetric efficiency with respect to arrangement of thehoisting machines 11 inside the frame body of thecounterweight 3. - In addition to this, the same effects as the first and the other embodiments can be attained.
-
Figure 7 is a diagram showing an example of an arrangement of the elevator system in accordance with the sixth embodiment of the present invention; and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway. - As shown in
Figure 7 , in the sixth embodiment, similarly to the fifth embodiment, ahoisting device 10 which comprises two hoistingmachines 11 is mounted on thecounterweight 3; and the twohoisting machines 11 are mounted inside the frame body of thecounterweight 3 so as to overlap each other in the horizontal direction, but not in the vertical direction. - Next: similarly to the third embodiment, the
main rope 9 used in the sixth embodiment is comprised of two sets ofmain rope units main rope unit 9a is fixed to an upper part of thehoistway 1; and themain rope unit 9a is passed around one of the twohoisting machines 11, and stretches to the upper-hoistway deflector sheaves 7. Then, after being passed around the two upper-hoistway deflector sheaves 7, themain rope unit 9a is passed on around a pair ofsuspension sheaves 6 for the car which are provided below theelevator car 4, and rises again; and the other end of themain rope unit 9a is fixed to an upper part of thehoistway 1. One end of the othermain rope unit 9b is also fixed to an upper part of thehoistway 1; however, next, themain rope unit 9b is passed around the other one of the twohoisting machines 11. The subsequent route is the same as that of themain rope unit 9a, thus explanation will be omitted. Accordingly, the two sets ofmain rope units - According to the aforementioned sixth embodiment, the hoisting
device 10 is comprised of two hoistingmachines 11; and it is possible to share the torque required for driving the elevator between the twohoisting machines 11. For this reason, there is no necessity to enlarge the external form of each of thehoisting machines 11 to adapt to elevators of large capacity. Furthermore, compared with the first to the fourth embodiments, because the twohoisting machines 11 are arranged parallelly in the horizontal direction, although the width A of thecounterweight 3 increases, arrangement wherein the wasted gap inside the frame body of thecounterweight 3 is decreased in the horizontal direction can be realized. Accordingly, in the case where the number of hoisting machines are further increased in order to adapt to elevators of large capacity, it is possible to minimize increase in the dimension E of the vertical direction of thecounterweight 3, and to improve volumetric efficiency with respect to arrangement of thehoisting machines 11 inside the frame body of thecounterweight 3. - In addition to this, the same effects as the first and the other embodiments can be attained.
-
Figure 8 is a diagram showing an example of an arrangement of the elevator system in accordance with the seventh embodiment of the present invention; and is a conceptual drawing showing the elevator car and the counterweight, which are suspended by the main rope, being driven to ascend and descend the hoistway by the hoisting device that is mounted on the counterweight, by expanding the elevation of the elevator system viewed from the horizontal direction of the hoistway. - As shown in
Figure 8 , similarly to the other embodiments, the hoistingdevice 10 comprises two hoistingmachines 11. However, in the seventh embodiment, one of thehoisting machines 11 is mounted on thecounterweight 3, and the other hoistingmachine 11 is provided in an upper part of thehoistway 1 so as to overlap thecounterweight 3 when viewed from the vertical direction. That is, thishoistingmachine 11 is provided above the travel area of thecounterweight 3 which ascends and descends being guided by theguiderails 2 for the counterweight, and between the pair ofguiderails 2 , which face each other. Accordingly, also in this case, two hoistingmachines 11 are provided so that there is no necessity to widen the width A or the thickness B of thecounterweight 3. - Next: the
main rope 9 used in the seventh embodiment has only one route. One end of themain rope 9 is fixed to an upper part of thehoistway 1, and themain rope 9 is longitudinally passed on around the twohoisting machines 11, and stretches to the upper-hoistway deflector sheaves 7. After being passed around the two upper-hoistway deflector sheaves 7, themain rope 9 is passed on around a pair ofsuspension sheaves 6 for the car which are provided below the elevator car, and rises again; and the other end of themain rope 9 is fixed to an upper part of thehoistway 1. The other structures and the motions thereof are the same as the first and the other embodiments, so the same numerals are given to the same parts or the corresponding parts, and repeated explanation is omitted. - Also in the seventh embodiment, the hoisting
device 10 is comprised of two hoistingmachines 11; and it is possible to share the torque required for driving the elevator between the twohoisting machines 11. For this reason, there is no necessity to enlarge the external form of each of thehoisting machines 11 to adapt to elevators of large capacity. Furthermore, the twohoisting machines 11 are mounted inside the frame body of thecounterweight 3 so as to overlap each other not in the horizontal direction, but in the vertical direction. Accordingly, with ahoisting device 10 using either the axial gap type or the radial gap type ofelectric motor 13, it is possible to cope with elevators with increased capacity without enlarging the horizontal projection area of the hoistway, because it is not necessary to enlarge the width A or the thickness B of thecounterweight 3. - In addition to this, the same effects as the first and the other embodiments can be attained.
- In the above-mentioned embodiments, examples wherein the
hoisting device 10 comprises two hoistingmachines 11 are described; however, in the elevator system in the present invention, the number ofhoisting machines 11 does not necessarily have to be two; and it is sufficient to mount at least one hoistingmachine 11 on thecounterweight 3, and the remaining plurality of hoistingmachines 11 can be either mounted on thecounterweight 3 or provided in an upper part of thehoistway 1. Accordingly, by constructing thehoisting device 10 usingN hoisting machines 11 of the same specifications, it is possible to cope with elevators of the capacity of N times without increasing the width A or the thickness B of thecounterweight 3. In accordance with this, by adjusting the number ofhoisting machines 11 to be mounted on thehoisting device 10, it is possible to provide an elevator system with an elevator of capacities of small ranges to large ranges without enlarging the horizontal projection area of thehoistway 1. - Furthermore, in the aforementioned embodiments, examples wherein the
hoisting device 10 is comprised of two hoistingmachines 11 of the same specifications are described; however, the plurality of hoisting machines can also be of different specifications; for example, a combination of hoisting machines of different capacities. - As aforementioned, the elevator system in accordance with the present invention enables structure of an elevator which can cope with increase in capacity of the elevator without enlargement in the horizontal projection area of the hoistway, i.e. increase in the space required for the hoistway in a building. Furthermore, by constructing the elevator by using a plurality of hoisting machines of the same specifications, it is able to serialize with facility elevators of capacities of small ranges to large ranges by just adjusting the number of hoisting machines. Accordingly, the present invention is useful as an elevator system which is excellent in productivity and installability and which can cope with increase in capacity of the elevator without eliminating the merits of an elevator of the space-saving type having a hoisting device mounted on counterweight.
Claims (8)
- An elevator system comprising:an elevator car (4) which travels through a hoistway (1);a counterweight (3) which travels through said hoistway (1) in the direction opposite to said elevator car (4);a main rope (9) which suspends said elevator car (4) and said counterweight (3); anda hoisting device (10) around which said main rope (9) is passed, and which drives said elevator car (4) and said counterweight (3);characterized in that said hoisting device (10) comprises at least two hoisting machines (11) comprising a drive sheave (12) around which said main rope (9) is passed and an electric motor (13) to drive said drive sheave (12) to rotate, and that at least one of said hoisting machines (11) is mounted on said counterweight (3).
- The elevator system according to claim 1, characterized in that all of said hoisting machines (11) of said hoisting device (10) are mounted on said counterweight (3).
- The elevator system according to claim 2, characterized in that at least two of said hoisting machines (11) of said hoisting device (10) are mounted inside the frame body of said counterweight (3) so as to overlap each other not in the horizontal direction, but in the vertical direction.
- The elevator system according to claim 1, characterized in that at least one of the rest of said hoisting machines (11) of said hoisting device (10) is provided in an upper part of the hoistway (1).
- The elevator system according to claim 4, characterized in that at least one of said hoisting machines (11) which are provided in said upper part of the hoistway (1) is installed so as to overlap said counterweight (3) in the vertical direction.
- The elevator system according to any one of claims 1 through 5, characterized in that said main rope (9) is successively passed on around at least two of said hoisting machines (11).
- The elevator system according to any one of claims 1 through 5, characterized in that said main rope (9) comprises at least two parallelly equipped sets of main rope units (9a, 9b), and that each of main rope units (9a, 9b) is passed around different said hoisting machine (11).
- The elevator system according to any one of claims 1 through 7, characterized in that hoisting machines (11) of same specifications are used as at least two of said hoisting machines (11) of said hoisting device (10).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2003/001470 WO2004071926A1 (en) | 2003-02-13 | 2003-02-13 | Elevator equipment |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1593640A1 EP1593640A1 (en) | 2005-11-09 |
EP1593640A4 EP1593640A4 (en) | 2011-04-13 |
EP1593640B1 true EP1593640B1 (en) | 2012-10-03 |
Family
ID=32866107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03705095A Expired - Fee Related EP1593640B1 (en) | 2003-02-13 | 2003-02-13 | Elevator equipment |
Country Status (5)
Country | Link |
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EP (1) | EP1593640B1 (en) |
JP (1) | JP4429920B2 (en) |
KR (1) | KR100688730B1 (en) |
CN (1) | CN100333991C (en) |
WO (1) | WO2004071926A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4561290B2 (en) * | 2004-10-06 | 2010-10-13 | 株式会社日立製作所 | Elevator equipment |
EP1832543B1 (en) * | 2004-12-27 | 2014-03-26 | Mitsubishi Denki Kabushiki Kaisha | Elevator apparatus |
CN1970422A (en) * | 2006-12-05 | 2007-05-30 | 孟繁贵 | Indirect-drive towed elevator |
KR100872928B1 (en) | 2007-03-26 | 2008-12-08 | 미쓰비시덴키 가부시키가이샤 | Elevator apparatus |
FI20070562L (en) | 2007-07-20 | 2009-01-21 | Kone Corp | Elevator |
RU2535956C2 (en) * | 2009-03-16 | 2014-12-20 | Отис Элевэйтор Компани | Configuration of elevator drives |
JP5932486B2 (en) * | 2012-05-28 | 2016-06-08 | 株式会社日立製作所 | Elevator equipment |
CN102942098A (en) * | 2012-11-09 | 2013-02-27 | 江苏大学 | Dual-motor elevator traction system and control method thereof |
CN105473488A (en) * | 2013-08-22 | 2016-04-06 | 三菱电机株式会社 | Elevator device |
WO2015125288A1 (en) * | 2014-02-24 | 2015-08-27 | 株式会社日立製作所 | Elevator device |
CN105775969A (en) * | 2015-12-15 | 2016-07-20 | 上海长江斯迈普电梯有限公司 | Brake voltage division control circuit of elevator tractor |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0570057A (en) * | 1991-09-17 | 1993-03-23 | Hitachi Building Syst Eng & Service Co Ltd | Elevator device |
EP0565516A1 (en) * | 1992-04-09 | 1993-10-13 | Werner Mag. Dr. Hagel | Elevator |
FI95687C (en) * | 1993-06-28 | 1996-03-11 | Kone Oy | Counterweight elevator machine / elevator motor |
BR9908227A (en) * | 1998-02-26 | 2000-10-31 | Otis Elevator Co | Belt lift with a drive counterweight |
JP2002504473A (en) * | 1998-02-26 | 2002-02-12 | オーチス エレベータ カンパニー | Double sheave rope type elevator system using flat flexible rope |
US6085874A (en) * | 1998-12-22 | 2000-07-11 | Otis Elevator Company | Rail-climbing elevator counterweight having flat machines |
JP4219034B2 (en) * | 1999-03-03 | 2009-02-04 | 東芝エレベータ株式会社 | elevator |
WO2002094701A1 (en) * | 2001-05-24 | 2002-11-28 | Mitsubishi Denki Kabushiki Kaisha | Elevator apparatus |
-
2003
- 2003-02-13 EP EP03705095A patent/EP1593640B1/en not_active Expired - Fee Related
- 2003-02-13 JP JP2004568177A patent/JP4429920B2/en not_active Expired - Fee Related
- 2003-02-13 KR KR1020047016333A patent/KR100688730B1/en not_active IP Right Cessation
- 2003-02-13 WO PCT/JP2003/001470 patent/WO2004071926A1/en active Application Filing
- 2003-02-13 CN CNB038050129A patent/CN100333991C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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EP1593640A1 (en) | 2005-11-09 |
KR20040099438A (en) | 2004-11-26 |
CN1639046A (en) | 2005-07-13 |
EP1593640A4 (en) | 2011-04-13 |
CN100333991C (en) | 2007-08-29 |
JP4429920B2 (en) | 2010-03-10 |
KR100688730B1 (en) | 2007-03-02 |
WO2004071926A1 (en) | 2004-08-26 |
JPWO2004071926A1 (en) | 2006-06-01 |
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