CN1522219A - Elevator device - Google Patents

Abstract

An elevator comprising first and second drivers disposed horizontally above a cage such that they are superposed on the cage in the vertical projection surface. A first main rope is passed around the first drive sheave of the first driver and a second main rope is passed around the second drive sheave of the second driver. A first cage pulley for leading the first main rope to the cage and a second cage pulley for leading the second main rope to the cage are disposed above the cage in the elevator shaft. A first counterweight pulley for leading the first rope to a counterweight and a second counterweight pulley for leading the second rope to the counterweight are disposed above the counterweight in the elevator shaft.

Description

Elevator device

technical field

The present invention relates to a multi-drive type elevator apparatus in which one elevator car is raised and lowered by a first drive device and a second drive device.

Background technique

Fig. 9 is a perspective view showing, for example, a conventional elevator apparatus disclosed in Japanese Patent Laid-Open No. 7-117957. In the figure, a pair of elevator car guide rails 2 and a pair of counterweight guide rails 3 are provided in an elevator shaft 1 . The elevator car 4 is guided up and down in the elevator shaft 1 by the elevator car guide rail 2 . The counterweight 5 is guided up and down in the lift shaft 1 by the counterweight guide rail 3 .

Above the counterweight 5 in the hoistway 1, first and second driving devices (hoists) 6, 7 are provided. The first driving device 6 includes: a shaft 8 horizontally fixed on the upper part of the elevator shaft 1, a stator (not shown) fixed on the shaft 8, a first driving pulley 9 rotating around the shaft 8, and facing the stator. And it is fixed to the rotor (not shown) inside the first drive pulley 9 .

The second driving device 7 includes: a shaft 8 common to the first driving device 6 , a stator (not shown) fixed on the shaft 8 , a second driving pulley 10 rotating around the shaft 8 , and fixed to the stator. A rotor (not shown) inside the second drive pulley 10 .

Above the elevator car 4 in the elevator shaft 1, first and second return pulleys 11 and 12 are provided to rotate freely. The first and second return pulleys 11 and 12 rotate around a horizontally extending rotary shaft.

The first main rope 13 is fully wound around the first drive pulley 9 and the first return pulley 11 . The second main rope 14 is fully wound around the second drive pulley 10 and the second return pulley 12 .

The elevator car 4 is connected to and suspended from the first ends of the first and second main ropes 13 and 14 . The second ends of the first and second main ropes 13 and 14 are connected to and suspended from a counterweight 5 . That is, the elevator car 4 and the counterweight 5 are suspended in the elevator shaft 1 in a 1:1 rope suspension manner.

This elevator device drives the first and second driving devices 6 and 7 simultaneously and moves the first and second main ropes 13 and 14 simultaneously so that the elevator car 4 and the counterweight 5 are raised and lowered in the hoistway 1 . In addition, the driving method in which one elevator car 4 is driven up and down by two driving devices 6 and 7 is called a multi-driving method. Furthermore, an elevator apparatus in which the drive devices 6 and 7 are arranged in the hoistway 1 without providing a machine room is called a machine room-less elevator.

Here, in the conventional multi-drive type elevator without a machine room shown in FIG. 9 , the drive devices 6 and 7 are arranged in the upper part of the elevator shaft 1 without interfering with the elevator car 4 . That is, the drive devices 6 and 7 are arranged so as not to overlap with the elevator car 4 in the vertical projection plane.

In addition, generally, the diameters of the driving pulleys 6 and 7 should not be smaller than a size specified by a ratio to the diameter of the main ropes 13 and 14 . Therefore, the diameter of the driving pulleys 6 , 7 is larger than the thickness dimension of the counterweight 5 . The driving pulleys 6, 7 are configured to extend horizontally with their rotary shafts, and in order to avoid interference between the elevator car 4 and the driving pulleys 6, 7, it is necessary to separate the counterweight 5 from the elevator car 4 according to the diameter of the driving pulleys 6, 7 configuration, thereby leading to an increase in the top view area of the lift shaft 1 .

Moreover, the drive pulleys 6, 7 and the return pulleys 11, 12 are configured such that their rotary shafts extend horizontally, and the main ropes 13, 14 are wound up in a half-winding manner, which cannot ensure sufficient traction capacity. Therefore, the main ropes 13, 14 are The full roll hanging method is used for roll hanging. Therefore, the shaft load acting on the rotary shafts of the drive pulleys 6, 7 and the return pulleys 11, 12 increases, and the rotary shafts and their supporting members become larger and more expensive.

Contents of the invention

The present invention was made in order to solve the above-mentioned problems, and an object of the present invention is to provide an elevator apparatus which can save the space in the hoistway and can simplify the supporting structure of the drive unit and the return pulley.

The elevator apparatus of the present invention comprises: lift shaft; Have the 1st driving pulley, the first driving device that is arranged in the upper part in the lifting shaft; Have the 2nd driving pulley, the 2nd driving device that is arranged in the upper part in the lifting shaft; Have the 1st and The second end, the first main rope wound on the first drive pulley; the second main rope having the third and fourth ends, wound on the second drive pulley; the first main rope formed by the first main rope The elevator car is suspended from the third end of the second main rope by the end and the third end of the second main rope and is lifted and lowered in the elevator shaft by the first and second driving devices; the second end of the first main rope and the fourth end of the second main rope A counterweight that is suspended at the end and is lifted and lowered in the elevator shaft by the first and second driving devices, characterized in that the first and second driving devices are horizontally arranged so as to overlap with the elevator car in the vertical projection plane and make the first The shaft of rotation of the second drive pulley and the second driving pulley extends vertically, and above the elevator car in the hoistway, a first car return pulley for guiding the first main rope to the car and a second car return pulley for guiding the second main rope to the car are provided. 2 Car return pulleys, above the counterweight in the hoistway, a first counterweight return pulley for guiding the first main rope to the counterweight and a second counterweight return pulley for guiding the second main rope to the counterweight are provided.

In addition, the elevator device of the present invention includes: an elevator shaft; a first driving device having a first driving pulley arranged on the upper part of the elevator shaft; a second driving device having a second driving pulley arranged on the upper part of the elevator shaft; The elevator car and the counterweight for lifting and lowering the first and second driving devices in the hoistway are characterized in that the first and second driving devices are horizontally arranged so as to overlap the elevator car in the vertical projection plane and make the first and second driving pulleys The rotary shaft of the shaft extends vertically, and the main rope with the first and second ends is wound on the first and second driving pulleys, the first and second ends are connected with the counterweight, and the second end of the main rope is wound. The 1st and 2nd car suspension pulleys are mounted on the lower part of the elevator car, and the 1st car return pulley for guiding the main rope from the 1st driving pulley to the 1st car hanging pulley and the The main rope is guided from the 2nd drive pulley to the 2nd car return pulley of the 2nd car suspension pulley, and the 1st counterweight is installed above the counterweight in the elevator shaft to guide the main rope from the 1st drive pulley to the counterweight The return pulley and the 2nd counterweight return pulley that guides the main rope from the 2nd drive pulley to the counterweight.

Moreover, the elevator device of the present invention includes: an elevator shaft; a first driving device having a first driving pulley disposed on the upper part of the elevator shaft; a second driving device having a second driving pulley arranged on the upper part of the elevator shaft; The elevator car and the counterweight that are lifted and lowered in the hoistway by the first and second driving devices are characterized in that the first and second driving devices are horizontally arranged so as to overlap with the elevator car in the vertical projection plane and make the first and second driving devices The rotation axis of the pulley extends vertically, and the main rope having the first and second ends is wound around the first and second driving pulleys, the first end is connected to one side of the elevator car, and the second end is connected to the elevator car The counterweight hoisting pulley on which the main rope is wound is mounted on the lower part of the counterweight. Above the elevator car in the elevator shaft, there is a first pulley that guides the main rope from the first driving pulley to the side of the elevator car. The car return pulley and the second car return pulley that guide the main rope from the second drive pulley to the other side of the car are provided above the counterweight in the hoistway to guide the main rope from the first drive pulley to the distribution box. The 1st counterweight return sheave of the heavy hoisting sheave and the 2nd counterweight return sheave that guides the main rope from the 2nd drive sheave to the counterweight hoisting sheave.

A brief description of the drawings

Fig. 1 is a plan view showing an elevator apparatus according to Embodiment 1 of the present invention.

Fig. 2 is a front view showing the outline of the elevator apparatus in Fig. 1 .

Fig. 3 is a plan view showing an elevator apparatus according to Embodiment 2 of the present invention.

Fig. 4 is a front view showing the outline of the elevator apparatus in Fig. 3 .

Fig. 5 is a plan view showing an elevator apparatus according to Embodiment 3 of the present invention.

Fig. 6 is a front view showing the outline of the elevator apparatus in Fig. 5 .

Fig. 7 is a plan view showing an elevator apparatus according to Embodiment 4 of the present invention.

Fig. 8 is a front view showing the outline of the elevator apparatus in Fig. 7 .

Fig. 9 is a perspective view showing an example of a conventional elevator apparatus.

Detailed ways

Embodiments of the present invention will be described below with reference to the drawings.

Example 1

Fig. 1 is a plan view showing an elevator apparatus according to Embodiment 1 of the present invention, and Fig. 2 is a front view showing an outline of the elevator apparatus in Fig. 1 .

In the figure, a pair of elevator car guide rails 22 and a pair of counterweight guide rails 23 are provided in the hoistway 21 . The elevator car 24 is guided by the elevator car guide rails 22 and is raised and lowered within the elevator shaft 21 . The counterweight 25 is guided by the counterweight guide rail 23 and is raised and lowered in the shaft 21 .

The elevator car 24 has mutually opposing first and second side surfaces 24a and 24b, and mutually opposing front surfaces 24c and rear surfaces 24d. An elevator car entrance and exit are provided at the front 24c.

The counterweight 25 is disposed on the side of the elevator car 24 so as to face the first side surface 24c. The counterweight guide rails 23 are arranged such that a straight line connecting the pair of counterweight guide rails 23 extends perpendicularly to a straight line connecting the pair of car guide rails 22 in the vertical projection plane.

A machine table 26 is supported and fixed on upper end portions of the car guide rail 22 and the counterweight guide rail 23 . On the machine table 26 are mounted the first and second driving devices (hoisting machines) 27 and 28 for elevating the elevator car 24 and the counterweight 25 . The first driving device 27 has a first driving device main body 27a including a motor, and a first driving pulley 27b that is rotated by the first driving device main body 27a.

The second driving device 28 has the same size and structure as the first driving device 27, and has a second driving device main body 28a and a second driving pulley 28b.

As the driving devices 27, 28, a thin hoist is used in which the diameter of the driving pulleys 27b, 28b is larger than the axial dimension of the driving device main bodies 27a, 28a. In addition, the drive units 27, 28 are horizontally arranged such that the rotation axes of the drive pulleys 27b, 28b extend vertically. Furthermore, the first and second driving devices 27 and 28 are disposed on the side closer to the second side surface 24b and above the elevator car 24 at the center of the elevator car 24 in the front width direction. That is, the first and second driving devices 27 and 28 are arranged inside the area of the elevator car 24 in the vertical projection plane.

In addition, the first and second driving devices 27 and 28 are arranged at approximately the same height as the first and second driving pulleys 27 and 28 .

The first main rope 29 for suspending the elevator car 24 and the counterweight 25 is wound around the first drive pulley 27b. Although only one 1st main rope 29 is shown in the drawing, it may be a plurality of ropes.

The second main rope 30 for suspending the elevator car 24 and the counterweight 25 is wound around the second drive pulley 28b. Although only one second main rope 30 is shown in the figure, it may be a plurality of ropes.

The winding angles of the first and second main ropes 29, 30 to the drive pulleys 27b, 28b are set to be larger than 90°. More specifically, the above-mentioned winding angle is set to be greater than 130°. In addition, the first and second main ropes 29 and 30 are half wound around the drive pulleys 27b and 28b.

A first car return pulley 31 that guides the first main rope 29 to the car 24 is arranged above the first side surface 24 a of the car 24 . A second car return pulley 32 that guides the second main rope 30 to the car 24 is arranged above the second side surface 24 b of the car 24 .

Above the counterweight 25 in the hoistway 21, a first counterweight return pulley 33 that guides the first main rope 29 to the counterweight 25 and a second counterweight return that guides the second main rope 30 to the counterweight 25 are disposed. pulley34.

The auxiliary pulley 35 which winds the 2nd main rope 30 and increases the winding angle of the 2nd main rope 30 with respect to the 2nd driving pulley 28b is arrange|positioned at the upper part in the hoistway 21. As shown in FIG.

The return pulleys 31-34 are arrange|positioned so that the rotary shaft may extend horizontally. The auxiliary pulley 35 is arranged such that its rotation axis extends approximately vertically.

First and second car suspension parts 36 and 37 are provided at lower end portions of the first and second side surfaces 24 a and 24 b of the car 24 . The first and second car suspension parts 36 and 37 are arranged so that the straight line connecting them passes through the center of gravity of the car 24 in the vertical projection plane.

The first main rope 29 has a first end portion 29 a connected to the first car suspension portion 36 and a second end portion 29 b connected to the upper frame 25 a of the counterweight 25 . The 2nd main rope 30 has the 3rd end portion 30a that is connected with the 2nd car suspension portion 37 and the 4th end portion 30b that is connected with the upper frame 25a of counterweight 25.

Pulley shackles 38 are respectively connected to the first to fourth end portions 29a, 29b, 30a, and 30b. A shackle spring 39 is interposed between the pulley shackle 38 and the lower surfaces of the car suspension parts 36 and 37 and the lower surface of the upper frame 25a.

In the lower part of the elevator car 24, a first detection device 40 for detecting the displacement of the pulley shackle 38 of the first elevator car suspension part 36 and a displacement of the pulley shackle 38 of the second elevator car suspension part 37 are provided. The second detection device 41 for detecting the amount. As the first and second detection means 40 and 41, for example, reflective optical sensors can be used. In addition, not only reflective optical sensors but also various contact or non-contact sensors can be used.

A control panel 42 for controlling the first and second driving devices 27 and 28 and a speed controller 43 for detecting overspeed of the elevator car 24 are mounted on the machine table 26 . That is, the control panel 42, the speed governor 43, the first and second driving devices 27, 28, the first and second car return pulleys 31, 32, the first and second counterweight return pulleys, and the first and second counterweight return pulleys are mounted on the mechanical platform 26. Pulley 33,34, auxiliary pulley 35.

In addition, as shown in FIG. 2 , the machine table 26 is disposed between the first and second driving devices 27, 28, the first and second car return pulleys 31, 32, and the first and second counterweight return pulleys 33, 34. within the setting range for the up and down direction. Furthermore, the machine table 26 is supported on the upper portions of the car guide rail 22 and the counterweight guide rail 23 via a plurality of support stands 44 and a plurality of buffer members 45 .

In such an elevator apparatus, the elevator car 24 and the counterweight 25 are moved up and down in the hoistway 21 by simultaneously driving the first and second driving devices 27 and 28 . At this time, since the first and second driving devices 27, 28 are arranged horizontally, and the elevator car return pulleys 31, 32 and the counterweight return pulleys 33, 34 are used, even if the main ropes 29, 30 are wound in a half-winding manner Hanging on the driving pulleys 27b, 28b also ensures a sufficient winding angle. Thereby, the shaft load of drive pulley 27b, 28b can be lightened, and the support structure of drive apparatus 27, 28 and return pulleys 31-34 can be simplified.

In addition, since the first and second driving devices 27 and 28 are arranged so as to overlap the elevator car 24 in the vertical projection plane, the planar planar size of the elevator shaft 21 can be suppressed. In addition, since a thin winch is used as the driving means 27, 28, regardless of the diameter of the driving pulleys 27b, 28b, while avoiding the interference between the elevator car 24 and the driving means 27, 28, the increase in the vertical dimension of the elevator shaft 21 can be suppressed. big. Thereby, the space in the elevator shaft 21 can be saved.

Furthermore, since the first and second detection devices 40, 41 are arranged at the lower portion of the elevator car 24, the tension difference between the first and second main ropes 29, 30 can be monitored. The tension difference is monitored by the control panel 42, and when the tension difference reaches a preset value, an instruction signal for eliminating the tension difference is sent from the control panel 42 to the driving devices 27, 28.

Furthermore, since the auxiliary pulley 35 is used, the winding angle of the second main rope 30 to the second drive pulley 28b is increased, and sufficient traction capacity can be ensured.

In addition, the control panel 42, the speed governor 43, the first and second driving devices 27, 28, the first and second car return pulleys 31, 32, the first and second counterweight return pulleys 33, 34, and the auxiliary pulley 35 are loaded on the common mechanical platform 26, can make the structure simple. Furthermore, the machine table 26 and the equipment mounted on the machine table 26 can be unitized, and can be easily installed in the elevator shaft 21 .

In addition, the machine table 26 is installed within the range of the vertical direction of the first and second driving devices 27, 28, the first and second car return pulleys 31, 32, and the first and second counterweight return pulleys 33, 34. , can save the upper space in the elevator shaft 21.

In addition, the mechanical table 26 is supported on the upper part of the elevator car guide rail 22 and the counterweight guide rail 23 through a plurality of support platforms 44 and a plurality of buffer members 45, which can prevent the vibration of the driving devices 27, 28 and the return pulleys 31-34 from being transmitted to the guide rail 22. ,twenty three.

Moreover, the elevator car suspension parts 36, 37 are arranged at a position lower than the upper surface of the elevator car 24, and the shackle spring 39 is arranged at the lower part of the elevator car suspension parts 36, 37, so the rope shackle 38 and the shackle spring 39 It is not necessary to protrude above the elevator car 24, and the height dimension of the elevator shaft 21 can be reduced.

Furthermore, the first and second car suspension parts 36, 37 are arranged so that the straight line connecting them passes through the center of gravity of the car 24 in the vertical projection plane, so that the car 24 can be suspended stably.

In Embodiment 1, the first and second driving devices 27 and 28 are disposed on the side of the entrance width direction center of the elevator car 24 close to the second side surface 24b, but the second driving device 28 may also be disposed on the first side surface 24a side, for example. . In this case, the auxiliary pulley 35 is arranged in the vicinity of the first driving device 27, and the part of the second main rope 30 from the second driving pulley 28b toward the second counterweight return pulley 34 is wound on the auxiliary pulley 35, thereby, The winding angle of the second main rope 30 with respect to the second drive pulley 28b can be increased.

Example 2

Next, FIG. 3 is a plan view showing an elevator apparatus according to Embodiment 2 of the present invention, and FIG. 4 is a front view showing an outline of the elevator apparatus in FIG. 3 . In the drawing, the counterweight 25 is disposed behind the car 24 so as to face the rear face 24d of the car 24 . The counterweight guide rails 23 are arranged such that a straight line connecting the pair of counterweight guide rails 23 extends parallel to a straight line connecting the pair of elevator car guide rails 22 in the vertical projection plane.

The first and second driving devices 27 and 28 are disposed on the side closer to the front face 24c and above the elevator car 24 in the center of the car 24 in the depth direction (vertical direction in FIG. 3 ). A portion of the first main rope 29 extending from the first drive pulley 27b to the first car return pulley 31 and a portion of the second main rope 30 extending from the second drive pulley 28b to the second car return pulley 32 cross each other. Other structures are the same as in Embodiment 1.

In this elevator device, the first and second driving devices 27, 28 are horizontally arranged so that they overlap the elevator car 24 in the vertical projection plane, and the main ropes 29, 30 return to the car through the car return pulleys 31, 32 and the counterweight. The pulleys 33, 34 are guided to the elevator car 24 and the counterweight 25, and the same effect as that of the first embodiment can be obtained.

Example 3

Next, FIG. 5 is a plan view showing an elevator apparatus according to Embodiment 3 of the present invention, and FIG. 6 is a front view showing an outline of the elevator apparatus in FIG. 5 . In the figure, the lower part of the car 24 is provided with first and second car return pulleys which can rotate freely. The car return pulleys 51 and 52 are disposed so that their rotary shafts extend horizontally in parallel with the depth direction of the car 24 . In addition, the car return pulleys 51, 52 are disposed so as to intersect the first and second side surfaces 24a, 24b within the vertical projection plane.

1st and 2nd drive pulleys 27b, 28b, 1st and 2nd car return pulleys 31, 32, 1st and 2nd counterweight return pulleys 33, 34, 1st and 2nd car suspension pulleys 51, 52 The main rope 53 is hung on the volume. The main rope 53 shows only one in the figure, but may include one or more ropes.

In addition, the car return pulleys 51 , 52 are configured such that the main rope 53 passes between them through the center of gravity of the car 24 .

The main rope 53 has first and second end portions 53a, 53b. The first and second end portions 53a, 53b are connected to the upper frame 25a of the counterweight 25 via the rope shackle 38 and the shackle spring 39 .

In addition, the main rope 53 is suspended from the first end portion 53a by the first counterweight return pulley 33, the first drive pulley 27b, the first car return pulley 31, the first car suspension pulley 51, and the second car suspension pulley. The pulley 52, the second car return pulley 32, the second drive pulley 28b, and the second counterweight return pulley 34 are wound up to the second end portion 53b in this order.

The first and second detection devices 40 and 41 are mounted on the upper frame 25 a of the counterweight 25 . Other structures are the same as in Embodiment 2.

In this elevator device, the first and second driving devices 27, 28 are horizontally arranged so that they overlap the elevator car 24 in the vertical projection plane, and the main rope 53 returns to the car through the car return pulleys 31, 32 and the counterweight. The pulleys 33, 34 are guided to the elevator car 24 and the counterweight 25, and the same effects as in Embodiments 1 and 2 can be obtained.

In addition, since the car 24 is suspended by the car suspension pulleys 51 and 52 which can rotate freely, the car 24 can be suspended stably. Furthermore, the number of main ropes 53 can be reduced, thereby reducing the number of terminal connection parts of the main ropes 53 and reducing costs.

Example 4

Next, FIG. 7 is a plan view showing an elevator apparatus according to Embodiment 4 of the present invention, and FIG. 8 is a front view showing an outline of the elevator apparatus in FIG. 7 . In the figure, a rotatable counterweight suspension pulley 54 is mounted on the lower portion of the counterweight 25 . The counterweight suspending pulley 54 is disposed so that its rotation axis is parallel to the width direction of the counterweight 25 (left-right direction in FIGS. 7 and 8 ) and extends horizontally. In addition, the counterweight suspending pulley 54 is disposed at the center of the counterweight 25 in the width direction, that is, at the center of gravity of the counterweight 25 .

The first end portion 53a of the main rope 53 is connected to the first car suspension portion 36 via the rope shackle 38 and the shackle spring 39 . The second end portion 53b of the main rope 53 is connected to the second car suspension portion 37 via the rope shackle 38 and the shackle spring 39 .

In addition, the main rope 53 passes the first car return pulley 31, the first drive pulley 27b, the first counterweight return pulley 33, the counterweight suspension pulley 54, the second counterweight return pulley 34, The order of the 2nd drive pulley 28b and the 2nd car return pulley 32 is wound up to the 2nd end part 53b sequentially. Other structures are the same as in Embodiment 2.

In this elevator device, the first and second driving devices 27, 28 are horizontally arranged so that they overlap the elevator car 24 in the vertical projection plane, and the main rope 53 returns to the car through the car return pulleys 31, 32 and the counterweight. The pulleys 33, 34 are guided to the elevator car 24 and the counterweight 25, and the same effects as in Embodiments 1 and 2 can be obtained.

In addition, the counterweight 25 is suspended by the freely rotatable counterweight suspension pulley 54, so that the counterweight 25 can be stably suspended. Furthermore, the number of main ropes 53 can be reduced, thereby reducing the number of end connection parts of the main ropes 53 and reducing costs.

In Embodiment 4, the counterweight suspension pulley 54 is installed on the bottom of the counterweight 25 , but the counterweight suspension pulley 54 may also be installed on the top of the counterweight 25 .

In addition, in Embodiments 1 to 4, the mechanical table 26 may also be fixed on the wall of the elevator shaft instead of the guide rails 22 and 23 .

In addition, as the main rope, although a steel rope can also be used, a resin-coated rope in which an outer layer coating made of a high-friction resin material is provided on the outer periphery can also be used, and the diameter of the driving pulley and the return pulley can be reduced. Small, saving space in the lift shaft.

Claims (10)

1. An elevator device comprising: elevator shaft; having a first driving pulley, and a first driving device arranged at the upper part of the elevator shaft; a second driving device having a second driving pulley and disposed on the upper part of the elevator shaft; a first main rope having first and second ends wound around the first drive pulley; a second main rope having third and fourth ends wound around the second drive pulley; an elevator car suspended from the first end of the first main rope and the third end of the second main rope and raised and lowered in the elevator shaft by the first and second driving devices; a counterweight suspended from the second end of the first main rope and the fourth end of the second main rope and raised and lowered in the elevator shaft by the first and second driving devices, It is characterized in that, The first and second driving devices are arranged horizontally so as to overlap with the elevator car in a vertical projection plane and to extend vertically the rotation axes of the first and second driving pulleys, A first car return pulley for guiding the first main rope to the car and a first car return pulley for guiding the second main rope to the car are provided above the car in the hoistway. 2 lift car return pulleys, A first counterweight return pulley for guiding the first main rope to the counterweight and a second counterweight for guiding the second main rope to the counterweight are provided above the counterweight in the shaft. 2 Counterweight return pulleys. 2. The elevator apparatus according to claim 1, characterized in that, The elevator car has mutually opposite first and second sides and mutually opposite front and rear, The counterweight is arranged to face the first side surface, The first and second driving devices are disposed on the side near the second side surface at the center of the entrance width direction of the elevator car in the vertical projection plane, The first elevator car return pulley is disposed above the first side surface, The second elevator car return pulley is disposed above the second side surface, The second main rope is wound around an upper portion in the shaft, and an auxiliary pulley is arranged to increase a winding angle of the second main rope to the second drive pulley. 3. The elevator apparatus according to claim 1, wherein: The elevator car has mutually opposite first and second sides and mutually opposite front and rear, said counterweight is disposed opposite said rear face, The first and second driving devices are arranged on the side closer to the front side of the center of the elevator car in the depth direction in the vertical projection plane, The first elevator car return pulley is disposed above the first side surface, The second elevator car return pulley is disposed above the second side surface, A portion extending from the first drive pulley of the first main rope to the first car return pulley and from the second drive pulley of the second main rope to the second car return pulley The extended parts intersect each other. 4. The elevator apparatus according to claim 1, wherein a first detection device for detecting the displacement of the first end portion of the first main rope and a pair of detection devices are mounted on the elevator car. A second detection device for detecting a displacement amount of the third end portion of the second main rope. 5. An elevator device comprising: elevator shaft; having a first driving pulley, and a first driving device arranged at the upper part of the elevator shaft; a second driving device having a second driving pulley and disposed on the upper part of the elevator shaft; the elevator car and the counterweight that are raised and lowered in the elevator shaft by the first and second driving devices, It is characterized in that, The first and second driving devices are arranged horizontally so as to overlap with the elevator car in a vertical projection plane and to extend vertically the rotation axes of the first and second driving pulleys, A main rope having first and second ends is wound around the first and second drive pulleys, the first and second ends are connected to the counterweight, The first and second elevator car suspension pulleys on which the main rope is wound are mounted on the lower part of the elevator car, Above the elevator car in the elevator shaft, there is provided a first elevator car return pulley that guides the main rope from the first drive pulley to the first elevator car hanging pulley and guides the main rope from the said second drive pulley leads to a second car return pulley of said second car hanging pulley, A first counterweight return pulley for guiding the main rope from the first drive pulley to the counterweight and a first counterweight return pulley for guiding the main rope from the second drive pulley are provided above the counterweight in the shaft. 2nd counterweight return pulley leading to the counterweight. 6. An elevator device comprising: Liftshaft: having a first driving pulley, and a first driving device arranged at the upper part of the elevator shaft; a second driving device having a second driving pulley and disposed on the upper part of the elevator shaft; the elevator car and the counterweight that are lifted and lowered in the elevator shaft by the first and second driving devices, It is characterized in that, The first and second driving devices are arranged horizontally so as to overlap with the elevator car in a vertical projection plane and to extend vertically the rotation axes of the first and second driving pulleys, A main rope having first and second ends is wound around the first and second drive pulleys, The first end is connected to one side of the elevator car, and the second end is connected to the other side of the elevator car, The counterweight hanging pulley on which the main rope is wound is mounted on the lower part of the counterweight, Above the elevator car in the elevator shaft, there is provided a first elevator car return pulley for guiding the main rope from the first drive pulley to the side of the elevator car and a first elevator car return pulley for guiding the main rope from the the 2nd drive pulley leads to the 2nd car return pulley on the other side of the car, A first counterweight return pulley for guiding the main rope from the first drive pulley to the counterweight hoisting pulley and a first counterweight return pulley for guiding the main rope from the The second drive pulley leads to the second counterweight return pulley of the counterweight hanger pulley. 7. The elevator device according to any one of claims 1 to 6, characterized in that, the first and the second driving means are respectively provided with a driving means body comprising a motor and the driving means rotated by the driving means body. The diameter of the pulley and the driving pulley is larger than the axial dimension of the driving device body. 8. Elevator installation according to any one of claims 1 to 6, characterized in that A mechanical platform is provided in the upper part of the elevator shaft, A control panel for controlling the first and second driving devices, a speed controller for detecting overspeed of the elevator car, the first and second driving devices, and the The first and second elevator car return pulleys, and the first and second counterweight return pulleys. 9. The elevator apparatus according to claim 8, wherein the machine table is disposed on the first and second driving devices, the first and second car return pulleys, the first and second 2. Return the counterweight within the setting range of the vertical direction of the pulley. 10. Elevator apparatus as claimed in claim 8, characterized in that, An elevator car guide rail for guiding the elevator car up and down and a counterweight guide rail for guiding the counterweight up and down are provided in the elevator shaft, The machine table is supported on an upper portion of at least one of the elevator car guide rail and the counterweight guide rail via a buffer member.

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