JP2010111460A - Elevator system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator system in which a sash pulley as a driving sheave driven by a motor and the other sash pulley as a deflector sheave are effectively disposed and constituted. <P>SOLUTION: In the elevator system, a rope 17 for suspension and support is wound on a return pulley 22 for a car 11 fixed to the top of a hoistway 13, a return pulley 24 for a relay between the car 11 side and a counter weight side, two sash pulleys 20, 21 provided to a return pulley 23 for the counter weight and the counter weight 12, and two sash pulleys 18, 19 provided to the car 11, respectively, and roping of N:1 (N is an integer not less than 4) is performed. In the counter weight 12, one of the sash pulley 20 as the driving sheave and the sash pulley 21 as the deflector sheave is provided inside the frame 12a of the counter weight 12, and the other one is provided above the outside of the frame. The rope 17 passing through the return pulley 24 for the relay winds on the sash pulley 20, the return pulley 23, and the sash pulley 21 one after the other. Further, the diameter of the sash pulley 20 inside the frame is set larger than that of the sash pulley 21 outside the frame of the upper part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention wraps a rope for suspension support around a return wheel fixed to the top of the hoistway, a suspension wheel provided on the counterweight side, and a suspension car provided on the car side, respectively. The present invention relates to an elevator system that raises and lowers a car and a counterweight by rotating a suspension wheel provided on the counterweight side by a motor mounted on the counterweight.

  2. Description of the Related Art Conventionally, various so-called machine roomless elevators that do not have a machine room at the top of a hoistway have been developed and proposed in order to efficiently use a space in a building and avoid problems such as the right of sunshine.

  There are various types of such machine roomless elevators. Among them, there is a type in which the counterweight is lifted and lowered by using a driving device provided on the counterweight, thereby raising and lowering the car. (For example, refer to Patent Document 1).

In the elevator system with such a configuration, by providing a driving device such as a motor on the counterweight, compared to the conventional configuration in which the driving device is provided in the hoistway, the equipment arrangement is rational and space saving. Can be further improved.
JP 2003-104665 A

  However, an elevator system in which a driving device such as a motor is provided on a counterweight so far has a roping of up to 2: 1 and requires a large driving force to move up and down. For this reason, a relatively large drive device is required, and in order to mount it on the counterweight, there arises a problem that the mounting portion of the counterweight must be enlarged.

  In addition, since the suspension wheel provided on the counterweight itself is rotationally driven by a motor and used as a drive sheave, its mounting structure is different from the conventional counterweight. In particular, when the number of suspension vehicles is increased and roping is set to 4: 1 or more, these must be arranged and configured within the limited shape range of the counterweight, and a new configuration has been desired. .

  An object of the present invention is to provide an elevator system in which a suspension vehicle as a driving sheave driven by a motor and other suspension vehicles as a deflecting sheave are arranged effectively.

  The elevator system according to the present invention comprises a rope for suspension support, a return wheel for a car fixed to the top of the hoistway, a return wheel for relay between the car side and the counterweight side, and a return for the counterweight. An elevator system in which N: 1 (N: integer greater than or equal to 4) roping is applied around a car, a plurality of suspension cars provided on a counterweight, and a plurality of suspension cars provided on a car. The counterweight includes a suspension wheel serving as a drive sheave that is rotationally driven by a motor provided on the counterweight and a suspension wheel serving as a deflecting sheave, and the suspension wheel serving as the drive sheave. And either one of the suspension wheels to be deflected sheaves is installed in a frame constituting the counterweight, and the other is provided outside the frame and above the suspension vehicle provided in the frame, Return for relay from the car side The rope that has passed through the car is alternately wound around a suspension car that serves as the drive sheave, a return wheel for the counterweight, and a suspension car that serves as the deflecting sheave. The diameter is set larger than the diameter of the suspension wheel outside the frame provided in the upper part.

  In addition, the elevator system according to the present invention intersects the rotation surface of the suspension vehicle in the frame constituting the counterweight and the rotation surface of the suspension vehicle outside the frame provided in the upper part thereof as viewed from above. It is good also as a structure installed by the angle relationship to do.

  According to the present invention, a suspension wheel as a drive sheave driven by a motor and a suspension wheel as a deflecting sheave are provided on the counterweight side, and N: 1 (N is an integer of 4 or more) roping is performed, and a drive part It is possible to achieve a structure that does not cause an increase in the size of the counterweight by effectively arranging and configuring these suspension wheels.

  Hereinafter, an embodiment of an elevator system according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a front view showing a relationship between a car 11 and a counterweight 12 of an elevator system according to an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a car 11 and a counterweight. The state of roping for 12 is shown. In addition, in FIG. 3, illustration is abbreviate | omitted about the guide rail mentioned later shown in FIG.

  1 and 2, the car 11 is installed in a hoistway 13 of the building so as to be able to be raised and lowered. The car 11 has a vertical direction substantially in the center in the depth direction (the left-right direction in FIG. 1) on both side surfaces. It is guided up and down by a pair of guide rails 14 provided along the direction. In the same hoistway 13, the counterweight 12 is installed so as to be able to be raised and lowered between one side surface (side surface on the back side in FIG. 1) of the car 11 and an inner wall surface (not shown) of the hoistway 13. . Then, the counterweight 12 is guided up and down by a pair of guide rails 15 provided along the vertical direction on both side surfaces of the counterweight 12 in the width direction (left and right direction in FIGS. 1 and 2).

  For the car 11 and the counterweight 12, two ropes for supporting the suspension are provided on the counterweight 12 side, two suspension cars provided on the car 11 side, and N: 1 (N is an integer of 4 or more) roping is applied to each of the return wheels fixed to the top of the hoistway 13 in correspondence with these suspension vehicles. The car 11 and the counterweight 12 are moved up and down by rotating a suspension wheel provided on the counterweight 12 side by a motor in which this rope is mounted on the counterweight 12.

  For example, FIG. 3 shows a case of 4: 1 roping, and both ends 17 a and 17 b of the suspension support rope 17 are fixed to the top of the hoistway 13. In order to wind the rope 17, the car 11 and the counterweight 12 are provided with two suspension wheels 18, 19, 20, and 21, respectively. The number of return wheels 22, 23, 24 corresponding to 19 and 20, 21 is provided.

  The plurality of suspension wheels 18 and 19 provided on the upper surface of the car 11 are arranged such that their rotation surfaces are along the width direction (vertical direction in FIG. 2) of the car 11 having a rectangular parallelepiped shape. Are arranged side by side in the width direction. In addition, the plurality of suspension wheels 20 and 21 provided on the counterweight 12 side are in a state in which their rotational surfaces are along the width direction (the left-right direction in FIG. 2) of the counterweight 12 having a rectangular parallelepiped shape. The suspension wheel 20 is provided in the counterweight 12, and the other suspension wheel 21 is provided outside the balance weight 12 and above the suspension wheel 20 provided in the balance weight 12.

  The return wheel 22 is for the car 11, is constituted by two pulleys 22 a and 22 b, and is provided for turning back a rope passing through one suspension wheel 18 provided on the car 11 to the other suspension wheel 19. It has been. The return wheel 23 is for the counterweight 12, and is provided to return the rope 17 that has passed through one suspension wheel 20 provided on the balance weight 12 to the other suspension wheel 21. The return wheel 24 is used for relaying between the car 11 side and the counterweight 12 side, and the rope 17 passed through the suspension car 19 on the car11 side is used as the suspension car 20 on the counterweight 12 side. In order to turn back, as shown in FIG. 2, it is provided at a predetermined angle.

  Here, the two pulleys 22a and 22b constituting the return wheel 22 for the car 11 are disposed in the vicinity of the inside of the pair of guide rails 14 for the car 11, as shown in FIG. That is, the two pulleys 22a and 22b are located near the rails 14a or 14b of the pair of guide rails 14, and are attached to the corresponding ones of the rails 14a or 14b in a cantilever structure. Thus, the return pulley 22 is constituted by two pulleys 22a and 22b, and these are arranged near the corresponding rails 14a and 14b of the pair of guide rails 14, so that these two pulleys 22a and 22b are connected to the rail 14a. , 14b can be firmly held and fixed with a simple structure, and the load on the rails 14a, 14b can be reduced.

  As described above, in the two suspension wheels 20 and 21 provided on the counterweight 12 side, one suspension wheel 20 is provided in the balance weight 12 and the other suspension wheel 21 is provided on the one suspension wheel 20. It is provided above.

  As shown in FIG. 5, the counterweight 12 is actually composed of a frame 12a that forms an outline of the counterweight 12, and a weight portion 12b provided in the frame 12a. Therefore, one suspension vehicle 20 is provided in the frame 12a as shown in the figure, and the other suspension vehicle 21 is provided above the suspension vehicle 20 outside the frame 12a.

  Here, the diameter of the suspension wheel 20 provided in the frame 12a of the counterweight 12 is set larger than the diameter of the suspension wheel 21 outside the frame 12a provided in the upper part thereof.

  As shown in FIG. 3, one end 17 a of the rope 17 is fixed to the top of the hoistway 13, and the rope 17 is wound around one suspension car 18 on the car 11, and then the two of return wheels 22 at the top of the hoistway. It is wound around two pulleys 22a and 22b and is turned back downward. After that, after being wound around the other suspension wheel 19 on the car 11, it is wound around a relay return wheel 24 provided at the top of the hoistway, turned toward the counterweight 12, and folded back. . Then, after being wound around one large-diameter suspension wheel 20 provided in the counterweight 12, it is wound around a return wheel 23 at the top of the hoistway and folded downward. Further, after being wound around the other suspension wheel 21 having a relatively small diameter on the counterweight 12, the other end 17 b of the rope 17 is fixed to the top of the hoistway 13.

  Thus, in the example of FIG. 3, the rope 17 is wound around the suspension wheels 18, 19, 20, 21 and the return wheels 22, 24, 23 alternately so that 4: 1 roping is performed. .

  Here, since the suspension vehicle 20 installed in the counterweight 12 has a larger diameter than the suspension vehicle 21 installed in the upper part thereof, the rope 17 that has passed through the return wheel 24 for relay is suspended as described above. The rope 17 can be stretched without coming into contact with each other even if it is wound around the return wheel 23 at the top of the hoistway and then wound around the other suspension wheel 21 on the counterweight 12. It is possible to arrange the suspension wheels 20 and 21 vertically inside and outside the counterweight 12.

  Further, the counterweight 12 is provided with a drive sheave that drives the rope 17 in its length direction to move the counterweight 12 and the car 11 up and down. In the example of FIG. 3, the suspension wheel 20 in the counterweight 12 on which the rope 17 that has passed through the return wheel 24 used for relay from the car 11 side is first wound is used as the drive sheave. The suspension wheel 20 serving as the drive sheave is configured integrally with a flat motor in the counterweight 12 and is rotationally driven by the motor.

  Here, the suspension wheels 20 and 21 are dynamic pulleys, and constitute a 4: 1 roping together with the return wheels 23 and 24. In this case, looking at the counterweight 12 side, if the suspension wheels 20 and 21 and the return wheels 23 and 24 have the same diameter, the suspension wheel 21 on which the rope 17 is wound first from the fixed end 17b of the rope 17 is used. Assuming that the rotation speed is V, the rotation speed of the return wheel 23 around which the rope 17 is wound next is 2V, and the rotation speed of the suspension wheel 20 around which the rope 17 is wound next is 3V. In other words, as the counterweight 12 and the car 11 are moved up and down, one suspension wheel 20 provided on the counterweight 12 rotates at a speed three times that of the other suspension wheel 21.

  However, in this embodiment, the suspension wheel 20 serving as a drive sheave provided in the counterweight 12 is formed to have a larger diameter than the suspension wheel 21 serving as a deflecting sheave installed outside the upper frame. Therefore, although it depends on the size of the diameter, it does not rotate at a speed three times that of the other suspension wheel 21 as in the case of the same diameter described above. Even so, if the diameter of the suspension wheel 20 serving as the drive sheave is less than three times the diameter of the suspension wheel 21 serving as the deflecting sheave, the suspension wheel 20 serving as the drive sheave rotates at a higher speed than the suspension wheel 21 serving as the deflecting sheave. It will be. Thus, when high-speed rotation is required, less rotational torque is required.

  Generally, in order to increase the generated torque, a motor must pass a large current, and an increase in size is inevitable. On the other hand, increasing the rotational speed can be easily handled by increasing the number of input pulses, and does not require an increase in the size of the motor itself. Therefore, the motor that drives the suspension wheel 20 that is a drive sheave can be configured in a small size by reducing the torque, and can have a structure suitable for mounting on the counterweight 12.

  In this way, the drive motor mounted with the suspension wheel 20 serving as the drive sheave in the counterweight 12 can be reduced in size, and the installation in the counterweight 12 is facilitated. Further rationalization can be achieved, and a sufficient lifting drive force can be obtained.

  In addition, any one of the two suspension wheels 20 and 21 is provided in the frame 12a of the counterweight 12, and the other is disposed in an upper portion outside the frame 12a, so that these two suspension wheels 20 are provided. , 21 are arranged at the center in the width direction of the counterweight 12. Accordingly, the counterweight 12 is hung from the center of gravity, and smooth elevation is possible. Furthermore, the elevator system can be configured without increasing the width dimension or the thickness dimension of the counterweight 12.

  In the above embodiment, the return wheel 22 for the car 11 is constituted by two pulleys 22a and 22b. However, the return wheel 22 may be constituted by one pulley as shown in FIG. Thus, if the return wheel 22 is made into one pulley, the effect which can simplify the structure in the top part of the hoistway 13 will arise.

  Next, the suspension structure on the side of the car 11 will be described. In the above embodiment, the suspension cars 18 and 19 on the side of the car 11 are provided on the upper surface of the car 11. However, as shown in FIG. It may be provided at the lower part of the side surface of the car 11 or may be provided at the upper part of the side surface of the car 11 as shown in FIG.

  Here, in the middle part of the rectangular parallelepiped car 11 in the front-rear direction (left-right direction in FIG. 2), although not shown, the upper surface and the lower surface of the car 11 are along the transverse direction (up-down direction in FIG. 2). An upper beam and a lower beam are provided. Further, a vertical frame connecting both ends of the upper beam and the lower beam is provided on both side surfaces of the car 11. The suspension wheels 18 and 19 provided on the upper surface of the car 11 shown in FIGS. 3 and 6 are actually rotatably provided on the upper beam.

  In addition, the suspension vehicles 18 and 19 at the lower side of the car 11 shown in FIG. 7 (in FIG. 7, the suspension car 18 is hidden behind the car 11 and cannot be seen) are placed on both sides of the car 11 as described above. Each is provided rotatably at the lower part of the provided vertical frame. Similarly, the suspension vehicles 18 and 19 at the upper part of the side surface of the car 11 shown in FIG. 8 (the suspension car 18 is hidden behind the car 11 and cannot be seen in FIG. 8) are provided vertically on both sides of the car 11. The upper part of the frame is rotatably provided.

  If the suspension wheels 18 and 19 are thus provided on the side surface portion of the car 11, the upper beam portion of the car 11 can be simplified. Further, by providing the suspension wheels 18 and 19 on the side surface portion of the car 11, the installation work including the work of winding the rope 17 around the car 11 becomes easy. Further, in the configuration of FIG. 8, the rope 17 can be shortened.

  In the example of FIG. 9, the suspension wheels 18 and 19 are respectively constituted by two pulleys 18a, 18b and 19a, 19b, and are arranged on the upper surface of the two carriages 18a, 18b and 19a, 19b. It is attached to the beam. That is, the suspension vehicles 18 and 19 are arranged at intervals in the depth direction of the car 11 (left and right direction in FIG. 2), and the two pulleys 18a and 18b and 19a and 19b are arranged in the width direction of the car 11 ( They are arranged at intervals in the vertical direction of FIG.

  In this case, the rope 17 is wound around one pulley 18 a and the other pulley 18 b of the suspension wheel 18 from one end 17 a fixed to the front side of the top of the hoistway 13, and then on the top of the hoistway 13. It is wound around the provided return wheel 22 and folded back toward the car 11 again. The return wheel 22 is arranged close to one wall surface of the hoistway 13, and the rotation surface thereof is along the depth direction of the car 11. Therefore, the rope 17 turned back by the return wheel 22 is turned back at a predetermined interval in the depth direction of the car 11 and wound around the two pulleys 19b and 19a of the suspension car 19 on the car 11. After that, it is wound around a return wheel 24 used for relaying with the counterweight 12.

  In FIG. 10, the pulleys 18a, 18b and 19a, 19b of the suspension cars 18, 19 on the side of the car 11 are arranged on the lower surface of the car 11, and are attached to a lower beam (not shown). The other structure is the same as that shown in FIG.

  When configured as shown in FIGS. 9 and 10, the return wheel 22 is disposed close to one wall surface of the hoistway 13, and the rotation surface thereof is along the depth direction of the car 11. The pair of guide rails 14 shown in FIG. 2 can be directly attached to the upper end of one rail 14a. Therefore, it is not necessary to provide a beam for the return wheel 22 at the top of the hoistway 13, and the top structure of the hoistway 13 can be simplified.

  Although the embodiment shown in FIG. 11 performs the 4: 1 roping as in the embodiments described so far, the arrangement of the two suspension wheels 20 and 21 provided on the counterweight 12 is different. That is, the two suspension wheels 20 and 21 have their rotation surfaces along the width direction of the counterweight 12 having a rectangular parallelepiped shape. A suspension wheel 20 serving as a drive sheave integrated with a flat drive motor is provided above the suspension wheel 21 and outside the frame 12a of the counterweight 12. Also in this case, the suspension wheel 21 provided in the frame 12a of the counterweight 12 has a larger diameter than the suspension wheel 20 outside the frame.

  As shown in FIG. 11, the rope 17 has one end 17 a fixed to the top of the hoistway 13, and after being wound around one suspension wheel 18 on the car 11, the rope 17 has two return wheels 22 at the top of the hoistway. It is wound around two pulleys 22a and 22b and is turned back downward. After that, after being wound around the other suspension wheel 19 on the car 11, it is wound around a relay return wheel 24 provided at the top of the hoistway, turned toward the counterweight 12, and folded back. . The rope 17 that has passed through the return wheel 24 is a suspension wheel that becomes a relatively small-diameter drive sheave installed at the upper part outside the illustrated frame 12a out of the two suspension wheels 20 and 21 disposed on the counterweight 12. 20 is wound around. After that, it is wound around a return wheel 23 provided at the top of the hoistway 13 and is turned back toward the counterweight 12 again. The rope 17 wound around the return wheel 23 is wound around a suspension wheel 21 which is a relatively large-diameter deflecting sheave installed in the frame 12a of the counterweight 12, and thereafter, the end portion 17b is Fixed to the top of the hoistway 13.

  Also in this case, since the suspension wheels 20 and 21 are moving pulleys and constitute a 4: 1 roping together with the return wheels 23 and 24, the suspension wheels 20 and 21 and the return wheels 23 and 24 have the same diameter. For example, when the rotation speed of the suspension wheel 21 around which the rope 17 is wound first from the fixed end 17b of the rope 17 is V, the rotation speed of the suspension wheel 20 serving as the drive sheave is 3V. However, in this embodiment, since the suspension wheel 21 serving as the deflecting sheave has a larger diameter than the suspension wheel 20 serving as the drive sheave, one of the drive sheaves as the counterweight 12 and the car 11 are moved up and down. The suspension vehicle 20 rotates at a speed higher than three times that of the other suspension vehicle 21, and the required rotational torque is reduced by the high speed rotation. Accordingly, the motor for driving the suspension wheel 20 that is a drive sheave can be configured to be even smaller, and a structure suitable for mounting on the counterweight 12 can be achieved.

  In addition, it is possible to suspend the counterweight 12 in the center of gravity by arranging one of the two suspension wheels 20 and 21 in the counterweight 12 and the other in the upper portion outside the frame. In addition, the elevator system can be configured without increasing the width dimension or the thickness dimension.

  In FIG. 11, the return wheel 22 for the car 11 is composed of two pulleys 22a and 22b. However, as shown in FIG. 6, the return wheel 22 may be composed of one pulley. The structure described with reference to FIGS. 7 to 10 can be similarly applied to the suspension structure on the car 11 side.

  Next, the embodiment shown in FIGS. 12 and 13 will be described. Also in this embodiment, two suspension wheels 20 and 21 are provided on the counterweight 12, and 4: 1 roping is performed together with the return wheel 23 for the counterweight 12 and the return wheel 24 for relay from the car 11 side. ing. However, the two suspension wheels 20 and 21 have the same diameter. In addition, one of the suspension wheels 20 is a drive sheave integrally configured with a flat drive motor, and the rotation surface thereof is in a state along the width direction of the counterweight 12 having a rectangular parallelepiped shape. , Provided in the frame 12 a of the counterweight 12.

  On the other hand, the other suspension wheel 21 is used as a warping sheave, and is installed outside the frame 12 a above the suspension wheel 20. As shown in FIG. 12, the rotation surface of the suspension wheel 21 is provided along a direction intersecting with the width direction of the counterweight 12 having a rectangular parallelepiped shape.

  Other configurations are the same as those described in FIG. 2 and FIG.

  In this case, as shown in FIG. 13, one end 17 a of the rope 17 is fixed to the top of the hoistway 13, and the rope 17 is wound around one suspension wheel 18 on the car 11 and then returned to the top of the hoistway. It is wound around two pulleys 22a and 22b of 22, and is turned back downward. After that, after being wound around the other suspension wheel 19 on the car 11, it is wound around a relay return wheel 24 provided at the top of the hoistway, turned toward the counterweight 12, and folded back. . The rope 17 that has passed through the return wheel 24 is wound around a suspension wheel 20 that is a drive sheave installed in the balance weight 12 out of the two suspension wheels 20 and 21 disposed on the balance weight 12. . After that, it is wound around a return wheel 23 provided at the top of the hoistway 13 and is turned back toward the counterweight 12 again. The rope 17 folded back from the return wheel 23 is wound around a suspension wheel 21 serving as a deflecting sheave installed at the upper part outside the counterweight 12, and then the end 17 b is fixed to the top of the hoistway 13. Is done.

  Also in this case, the suspension wheels 20 and 21 are moving pulleys and constitute a 4: 1 roping together with the return wheels 23 and 24. Moreover, since the suspension wheels 20 and 21 and the return wheels 23 and 24 have the same diameter, if the rotational speed of the suspension wheel 21 on which the rope 17 is first wound from the fixed end 17b of the rope 17 is V, the drive The rotation speed of the suspension wheel 20 serving as a sheave is 3V. In other words, as the counterweight 12 and the car 11 are moved up and down, one suspension wheel 20 provided on the counterweight 12 rotates at a speed three times that of the other suspension wheel 21. In other words, the suspension wheel 20 that is a drive sheave needs to be rotated at a speed that is three times the lifting speed of the counterweight 12. However, the required rotational torque is reduced by the high speed rotation. Therefore, the motor for driving the suspension wheel 20 that is a drive sheave can be configured in a small size, and a structure suitable for mounting on the counterweight 12 can be obtained.

  In addition, the two suspension wheels 20 and 21 provided on the counterweight 12 have the same diameter, and are arranged above and below, but the rotation surfaces of the two suspension wheels 20 and 21 are above them. Since they are installed so as to intersect with each other when viewed from above, the ropes do not contact each other even if the ropes 17 are hung in the order described above.

  Furthermore, by providing one of the two suspension wheels 20 and 21 in the counterweight 12 and having the other provided in the upper part outside the frame, the counterweight 12 can be suspended from the center of gravity. In addition, an elevator system can be configured without increasing the width dimension or the thickness dimension.

  In FIG. 13, the return wheel 22 for the car 11 is composed of two pulleys 22a and 22b. However, as shown in FIG. 6, the return wheel 22 may be composed of one pulley. The structure described with reference to FIGS. 7 to 10 can be similarly applied to the suspension structure on the car 11 side.

  Although not shown, in addition to the return wheel 23 for the counterweight 12, another return wheel is provided on the top of the hoistway 13, and the rope passes through the suspension wheel 21 that serves as a deflecting sheave provided on the counterweight 12. 17 may be wound around the added return wheel, folded back to the counterweight 12 side, and the end portion 17b of the rope 17 may be fixed on the counterweight 12 to perform 5: 1 roping. In this case, the relationship between the two suspension wheels 20 and 21 in the counterweight 12 may be any of FIGS. 3, 11, and 13. Of course, on the side of the car 11, another return wheel is provided at the top of the hoistway 13 in addition to the return wheel 22 in accordance with the counterweight 12 side described above, and the suspension wheel 18 provided on the car 11 is provided. The passed rope 17 is wrapped around the added return wheel, folded back to the counterweight 12 side, and the end 17a of the rope 17 is fixed on the car 11, so that 5: 1 roping is performed.

  As described above, in each of the embodiments described above, the two suspension wheels 20 and 21 provided on the counterweight 12 are arranged vertically on the inside and outside of the counterweight 12, so that the counterweight 12 can be suspended at the center of gravity. In addition, roping of N: 1 (N is an integer of 4 or more) is possible without increasing the width and thickness of the counterweight 12. Also, a suspension wheel on the counterweight side on which the rope that has been subjected to N: 1 roping and passed through the return wheel used for relay from the car side is first wound is driven by a drive motor provided on the counterweight. Since the drive sheave is rotationally driven, the drive motor can be reduced in size due to low torque specifications by high-speed rotation, and a configuration suitable for mounting on a counterweight can be achieved.

1 is a front view illustrating an embodiment of an elevator system according to the present invention. It is a top view which shows the apparatus arrangement | positioning of embodiment of FIG. It is a perspective view explaining the roping in embodiment of FIG. It is a fragmentary figure which shows the relationship between the two pulleys which comprise the return pulley for passenger cars in embodiment of FIG. 1, and the guide rail which supports this. It is a front view which shows the relationship between the counterweight and the suspension wheel in embodiment of FIG. It is a perspective view at the time of comprising the return pulley for passenger cars in embodiment shown in FIG. 1 with one pulley. It is a perspective view at the time of providing the suspension vehicle for cars in embodiment shown in FIG. 1 in the side part lower part of a car. It is a perspective view at the time of providing the suspension vehicle for cars in embodiment shown in FIG. 1 in the side part upper part of a car. It is a perspective view at the time of providing the suspension vehicle for cars in embodiment shown in FIG. 1 on the upper surface of a car. It is a perspective view at the time of providing the suspension vehicle for cars in embodiment shown in FIG. 1 in the lower surface of a car. It is a top view which shows the apparatus arrangement | positioning of embodiment which provided the suspension wheel used as a deflecting sheave in the counterweight. It is a top view which shows the equipment arrangement | positioning of embodiment which made the suspension wheel used as a deflecting sheave the same diameter as the suspension vehicle used as the drive sheave provided in the counterweight, and made those rotation surfaces cross | intersect each other. It is a perspective view explaining the roping in embodiment shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Passenger car 12 Counterweight 13 Hoistway 14 Guide rail for passenger car 15 Guide rail for counterweight 17 Rope 18, 19 Suspension car on the car side 20 Suspension car on the counterweight side used as a driving sheave 21 Deflection A suspension wheel on the counterweight side that becomes the sheave 22 Return wheel for the car 23 Return wheel for the counterweight 24 Relay wheel for relay

Claims (5)

The suspension support rope is attached to the return car for the car fixed to the top of the hoistway, the return car for the relay between the car side and the counterweight side, the return car for the counterweight, and the counterweight. An elevator system in which a plurality of suspension vehicles provided and a plurality of suspension vehicles provided in a car are respectively wound and subjected to N: 1 (N: integer greater than or equal to 4) roping,
The counterweight includes a suspension wheel that serves as a drive sheave that is rotationally driven by a motor provided on the counterweight, and a suspension wheel that serves as a deflecting sheave.
Either one of the suspension sheave as the drive sheave or the suspension sheave as the deflecting sheave is installed in the frame constituting the counterweight, and the other is outside the frame and the suspension provided in the frame Provided above the car,
The ropes that have passed through the return wheel for relay from the car side are alternately wound around the suspension wheel that serves as the drive sheave, the return wheel for the counterweight, and the suspension wheel that serves as the deflecting sheave. ,
Furthermore, the diameter of the suspension vehicle in the said frame was set larger than the diameter of the suspension vehicle outside the frame provided in the upper part. The elevator system characterized by the above-mentioned. The suspension support rope is attached to the return car for the car fixed to the top of the hoistway, the return car for the relay between the car side and the counterweight side, the return car for the counterweight, and the counterweight. It is an elevator system in which two suspension vehicles provided and two suspension vehicles provided in a car are respectively wound and subjected to N: 1 (N is an integer of 4 or more) roping,
The counterweight includes a suspension wheel that serves as a drive sheave that is rotationally driven by a motor provided on the counterweight, and a suspension wheel that serves as a deflecting sheave.
Either one of the suspension sheave as the drive sheave or the suspension sheave as the deflecting sheave is installed in the frame constituting the counterweight, and the other is outside the frame and the suspension provided in the frame Provided above the car,
The rope that has passed through the return wheel for relay from the car side is alternately wound around the suspension wheel that becomes the drive sheave, the return wheel for the counterweight, and the suspension wheel that becomes the deflecting sheave.
Further, the elevator is characterized in that the rotation surface of the suspension vehicle in the frame and the rotation surface of the suspension vehicle outside the frame provided on the frame are installed at an angular relationship crossing each other when viewed from above. system.   The suspension wheel that serves as the drive sheave is installed in a frame that constitutes the counterweight, and the suspension vehicle that serves as the deflecting sheave is installed outside the frame and above the suspension vehicle provided in the frame. The elevator system according to claim 1 or 2, wherein   The suspension car that serves as the deflecting sheave is installed in a frame that constitutes the counterweight, and the suspension car that serves as the drive sheave is installed outside the frame and above the suspension car provided in the frame. The elevator system according to claim 1 or 2, wherein   The car has a rectangular parallelepiped shape, and a pair of guide rails for vertically guiding the car in the hoistway are vertically arranged on both sides of the car. The return pulley for the car that turns the passed rope toward the other suspension car of the car is composed of two pulleys arranged in the vicinity of the inside of the pair of guide rails. The elevator system according to any one of claims 1 to 4, wherein the elevator system is attached to a corresponding one of the guide rails.

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