JP2016060635A - Tension adjuster of main rope and elevator device having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized and low-cost rope type elevator device capable of quickly and surely eliminating an imbalance of tension among a plurality of main ropes.SOLUTION: An elevator device 1A is provided with a plurality of main ropes 8a-8d for transmitting driving force of a hoist 9 to lifting bodies 4 and 5, a tension adjuster 7A for automatically eliminating an imbalance of tension generated among the plurality of these main ropes, and a support beam 6 for installing the tension adjuster 7A. The tension adjuster 7A comprises a main balance member 21 rotatably connected to the support beam 6 via a connection pin 24, and secondary balance members 22 and 23 rotatably connected to either end of the main balance member 21 via connection pins 25 and 26, and the main ropes 8a-8d are dispersively linked to either end of the respective secondary balance members 22 and 23.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a tension adjusting device for a main rope and a rope-type elevator device including the same.

  A rope type elevator device connects a riding car and a counterweight as a lifting body using a rope called a main rope, and generally three or more main ropes are used. In this type of elevator device, if the tension acting on each main rope becomes non-uniform, the load on a specific main rope increases and the durability is impaired. It is important to keep. Conventionally, in order to cope with such demands, a tension adjustment device has been provided that automatically adjusts the tension between the main ropes to eliminate unbalance even when there is a variation in the amount of extension between the main ropes. A rope type elevator apparatus has been proposed (see, for example, the abstracts of Patent Document 1 and Patent Document 2).

  The elevator car suspension mechanism described in Patent Document 1 includes a fixed bracket fixed to the upper surface of the car and the counterweight, and a clearance between at least two ropes that suspend the car and the counterweight with respect to the fixed bracket. And a seesaw plate whose fulcrum is supported by a cage or counterweight, and both ends are fixed to a pair of rope stators, and a plurality of ropes are effectively passed through the seesaw plate. It is characterized by being linked to one. According to Patent Document 1, according to the present invention, a plurality of ropes for suspending a car are effectively chained together via a seesaw plate, so that the tension between the ropes due to the difference in the elongation of the individual ropes and the like is reduced. It is stated that the balance can be canceled automatically.

  An elevator main rope mounting apparatus described in Patent Document 2 fixes a first pulley body having a rotatable pulley to each rope stop and a second pulley having a rotatable pulley. A vehicle body is provided between the first pulley bodies, and an intermediate portion of a tension rope having both ends attached to the upper beam is alternately wound around the pulleys of the first and second pulley bodies. To do. Patent Document 2 describes that, according to the present invention, the tension of the main rope can be automatically and uniformly maintained without frequently performing troublesome tension adjustment work.

  Furthermore, the elevator car suspension mechanism described in Patent Document 1 is formed by fixing the end portions of the ropes to the upper frame and the fixed receiver via coil springs. Moreover, the main rope attachment apparatus of the elevator described in Patent Document 2 is formed by fixing the end of each main rope to the upper beam via a spring. According to the techniques described in Patent Literatures 1 and 2, since the coil spring (spring) is arranged at the end of each rope (main rope), when relative elongation occurs between each rope (main rope) In addition, the tension of each rope (main rope) can be adjusted to substantially the same value.

JP-A-7-330250 Japanese Patent Laid-Open No. 9-124254

  However, since the devices described in Patent Documents 1 and 2 each include the number of coil springs corresponding to the number of main ropes as essential components, the width dimension in the arrangement direction of the main ropes becomes large, for example, 2: This is disadvantageous for an elevator apparatus having a narrow space in the hoistway, such as a one-loping machine room-less elevator.

  In addition, since the apparatus described in Patent Document 1 effectively links a plurality of ropes into one via a seesaw plate, when the elongation of one rope occurs, the tension change of the rope is different from the other. There is a problem that it is difficult to propagate to the rope. That is, since each rope constituting the elevator car suspension mechanism is wound around the sheave of the hoisting machine, when one rope is stretched, it is connected to the rope via the seesaw plate. In order to change the tension of other ropes and other ropes connected to the other ropes through the seesaw plate, it is necessary to cause a slip between each rope and the sheave of the hoisting machine. However, in a state where tension is applied to the rope and the sheave is stopped, slippage is unlikely to occur between the rope and the sheave, so that a change in tension of one rope is difficult to propagate to other ropes. Therefore, it is estimated that it is difficult to quickly and reliably adjust the tension imbalance in each rope.

  Furthermore, since the apparatus described in Patent Document 2 includes first and second pulley bodies each having a plurality of pulleys, the configuration is complicated and large, and a great deal of labor is required for installation and maintenance at high cost. Cost.

  The present invention has been made in view of such a state of the art, and an object of the present invention is to provide a tension capable of quickly and surely eliminating tension unbalance between a plurality of main ropes with a small size and low cost. An object of the present invention is to provide an adjusting device and a rope-type elevator device including the adjusting device.

  In order to solve the above-described problems, the present invention relates to an elevator apparatus, and automatically includes a plurality of main ropes that transmit a driving force of a hoisting machine to a lifting body, and an unbalance of tension generated between the plurality of main ropes. In an elevator apparatus comprising a tension adjusting device for eliminating and a support beam for installing the tension adjusting device, the tension adjusting device includes a main balance member rotatably connected to the support beam via a connecting pin; A secondary balance member rotatably connected to the primary balance member via a connection pin, and when the number of primary ropes is an even number, the primary ropes are distributed to the secondary balance member. When the number of the main ropes is an odd number, the main ropes are dispersed and connected to the main balance member and the sub balance member.

  The present invention also relates to a tension adjusting device for a main rope, which is installed on a support beam and automatically adjusts tension unbalance between a plurality of main ropes that transmit a driving force of a hoisting machine to a lifting body. In the apparatus, a main balance member rotatably connected to the support beam via a connection pin, and a sub balance member rotatably connected to the main balance member via a connection pin, When the number of main ropes is an even number, these main ropes are dispersed and connected to the sub-balance member, and when the number of main ropes is an odd number, these main ropes are connected to the main balance member. And the sub-balance member is dispersedly connected.

  According to the present invention, since the main rope tension adjusting device is provided with the main balance member and the sub-balance member, the elevator device can quickly and reliably eliminate the tension imbalance between the main ropes in a small and low cost. Can provide. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a figure which shows the 1st example of the elevator apparatus provided with the tension adjustment apparatus of the main rope. It is a figure which shows the 2nd example of the elevator apparatus provided with the tension adjustment apparatus of the main rope. 1 is a front view of a tension adjusting device according to a first embodiment. 6 is a front view of a tension adjusting device according to Embodiment 2. FIG. 6 is a front view of a tension adjusting device according to Embodiment 3. FIG. 6 is a front view of a tension adjusting device according to Embodiment 4. FIG. FIG. 10 is a front view of a tension adjusting device according to a fifth embodiment. FIG. 10 is a front view of a tension adjusting device according to a sixth embodiment. FIG. 10 is a front view of a tension adjusting device according to a seventh embodiment.

  Hereinafter, embodiments of a tension adjusting device and an elevator apparatus according to the present invention will be described with reference to the drawings.

  First, an embodiment of an elevator apparatus will be described with reference to FIGS. 1 and 2. FIG. 1 shows a traction type elevator apparatus without a machine room, and FIG. 2 shows a traction type elevator apparatus with a machine room type. In addition, this invention is not limited to the elevator apparatus shown in FIG.1 and FIG.2, It can apply to all the rope type elevator apparatuses.

  In the elevator apparatus 1A shown in FIG. 1, guide rails 2 and 3 are vertically installed in the hoistway 1 so that the car 4 and the counterweight 5 are raised and lowered along the guide rails 2 and 3. It has become. A support beam 6 is horizontally installed on the upper part of the hoistway 1, and a tension adjusting device 7 is attached to the support beam 6. Further, a hoisting machine 9 that transmits driving force to the car 4 and the counterweight 5 via the main rope 8 is installed at the bottom of the hoistway 1. Both ends of the main rope 8 are connected to the tension adjusting device 7, a first return wheel 10 provided in the car 4 at an intermediate portion, a second return wheel 11 provided in the support beam 6, and a hoisting machine 9. Are sequentially wound around a sheave 12, a third return wheel 13 provided on the support beam 6, and a fourth return wheel 14 provided on the counterweight 5. In FIG. 1, only one main rope 8 is illustrated, but actually, a plurality of (usually 3 to 10) main ropes 8 are provided. When the sheave 12 of the hoisting machine 9 is rotated in the clockwise direction, the driving force is transmitted to the car 4 and the counterweight 5 via the main rope 8 to lift the car 4. The counterweight 5 is lowered. Further, when the sheave 12 of the hoisting machine 9 is rotated in the counterclockwise direction, the driving force is transmitted to the car 4 and the counterweight 5 via the main rope 8, and the countercar 4 is lowered and the counterweight 5 is raised. To do.

  The elevator apparatus 1B shown in FIG. 2 is provided with a machine room 15 above the hoistway 1 and transmits a driving force to the car 4 and the counterweight 5 via the main rope 8. A hoisting machine 9 is installed. In the hoistway 1, a car 4 and a counterweight 5 are installed so as to be able to move up and down along a guide rail (not shown), and a support beam 6 is provided above the car 4 and the counterweight 5. A tension adjusting device 7 is attached. Both ends of the main rope 8 are connected to the tension adjusting device 7, and an intermediate portion is sequentially wound around the sheave 12 of the hoisting machine 9 and the deflecting wheel 16 disposed in the vicinity thereof. The elevator apparatus 1B is also provided with a plurality of main ropes 8. When the sheave 12 of the hoisting machine 9 is rotated in the clockwise direction, the driving force is transmitted to the car 4 and the counterweight 5 via the main rope 8 to lift the car 4. The counterweight 5 is lowered. Further, when the sheave 12 of the hoisting machine 9 is rotated in the counterclockwise direction, the driving force is transmitted to the car 4 and the counterweight 5 via the main rope 8, and the countercar 4 is lowered and the counterweight 5 is raised. To do.

  Since the elevator devices 1A and 1B have both ends of the main rope 8 connected to the tension adjusting device 7, one of the plurality of main ropes 8 is stretched for some reason, and tension is generated between the plurality of main ropes 8. Even when an unbalance occurs, the tension unbalance is automatically canceled by the tension adjusting device 7. Therefore, an increase in the load on the main rope 8 that is not stretched can be prevented, the durability of the main rope 8 can be maintained, and the inclination of the car 4 can also be prevented. In addition, about the structure and effect of the tension | tensile_strength adjusting apparatus 7 which concern on this invention, it demonstrates in detail by the Example described below.

  Next, an embodiment of the tension adjusting device 7 according to the present invention will be described for each example with reference to the drawings. The tension adjusting device 7 according to the present invention includes a main balance member that is rotatably connected to the support beam 6 and a sub-balance member that is rotatably connected to the main balance member. In the embodiment described below, the case where four main ropes 8a to 8d are connected to the tension adjusting device 7 will be described as an example, but the number of main ropes is not limited to four. Any number of three or more can be used.

[Example 1]
As shown in FIG. 3, the tension adjusting device 7A according to the first embodiment includes a bell crank-shaped balance member 21 in which arms having the same length are formed on both sides of a bent portion as a main balance member and a sub-balance member, 22 and 23, and the auxiliary balance members 22 and 23 which are sub balance members are connected to both ends of the main balance member 21 which is a main balance member. The main balance member 21 is swingably connected to the support beam 6 via a connecting pin 24 provided at the bent portion. The sub balance members 22 and 23 are swingably connected to both end portions of the main balance member 21 via connection pins 25 and 26 provided at the bent portions, respectively.

  Connection pins 27, 28, 29, and 30 are rotatably connected to both ends of the subbalance members 22 and 23, and connection ropes 31, 28, 29, and 30 are connected to the connection pins 27, 28, 29, and 30, respectively. 32, 33 and 34 are fixed individually. The four main ropes 8a to 8d connected to the elevator car 4 and the counterweight 5, which are the lifting bodies, are connected to the connecting ropes 31, 32, 33, 34 using the rope end fittings 35, 36, 37, 38, respectively. Is done.

  Since the tension adjusting device 7A according to the first embodiment is configured as described above, length unbalance occurs between the four main ropes 8a to 8d connected to the car 4 and the counterweight 5, As a result, even when an imbalance occurs in the tension acting between the main ropes 8a to 8d, it can be automatically resolved. The reason will be described by taking as an example the case where elongation occurs in the main rope 8b after installation of the elevator apparatus and tension imbalance occurs between the main rope 8a and the main rope 8b. When elongation occurs in the main rope 8b, the tension acting on the main rope 8b decreases and the tension acting on the main rope 8a increases, so that only an angle corresponding to the tension difference between the main rope 8a and the main rope 8b is obtained. The subbalance member 22 swings counterclockwise about the connecting pin 25. Thereby, since the length of the main rope 8a and the main rope 8b is adjusted, the tension imbalance between the main rope 8a and the main rope 8b is automatically eliminated. When elongation occurs in the main rope 8a, the subbalance member 22 swings clockwise around the connecting pin 25, and the tension unbalance between the main rope 8a and the main rope 8b is automatically set. It will be resolved. Note that the unbalance of the lengths between the main ropes 8a to 8d can be caused not only by the rope elongation generated after the installation of the elevator apparatus but also by an error during the installation of the elevator apparatus.

  Similarly, when elongation occurs in the main rope 8c or the main rope 8d and an unbalance of tension occurs between the main rope 8c and the main rope 8d, the sub balance member 23 is watched around the connecting pin 26. And the tension unbalance between the main rope 8c and the main rope 8d is automatically eliminated.

  Further, when the tension on the main ropes 8a, 8b connected to the sub balance member 22 is higher than the tension on the main ropes 8c, 8d connected to the sub balance member 23, the tension difference is determined. Since the main balance member 21 rotates counterclockwise about the connecting pin 24 by the angle, the tension unbalance between the subbalance member 22 side and the subbalance member 23 side is automatically eliminated. . When the tension on the side of the main ropes 8c, 8d connected to the sub-balance member 23 is higher than the tension on the side of the main ropes 8a, 8b connected to the sub-balance member 22, an angle corresponding to the tension difference Accordingly, the main balance member 21 rotates clockwise about the connecting pin 24, so that the tension imbalance between the sub-balance member 22 side and the sub-balance member 23 side is automatically eliminated.

  The tension adjusting device 7A according to the first embodiment uses the main balance member 21 and the subbalance members 22 and 23 to eliminate the tension imbalance acting between the main ropes 8a to 8d. As a result, the spring device and pulley device provided as the above are unnecessary. Therefore, the tension adjusting device can be made small and simple, and can be easily applied to a machine room-less elevator with a narrow space in the hoistway. Further, in the tension adjusting device 7A according to the first embodiment, the main balance member 21 and the sub balance members 22 and 23 are formed in the bell crank shape, so that the installation of the main balance member 21 on the support beam 6 and the sub balance members 22 and 23 are performed. The main ropes 8a to 8d can be easily connected. That is, when the main balance member 21 is formed in a bell crank shape, the sub balance members 22 and 23 are less likely to interfere with the support beam 6, so that the installation of the main balance member 21 with respect to the support beam 6 can be facilitated. In addition, when the auxiliary balance members 22 and 23 are formed in a bell crank shape, the auxiliary balance members 22 and 23 are less likely to interfere with the main balance member 21, so that the main rope 8a using the rope end fittings 35, 36, 37, and 38 is used. -8d and the connecting work of the connecting ropes 31, 32, 33, 34 can be facilitated.

  As the balance members 21, 22, 23, it is not always necessary to use a bell crank-shaped member, and a straight rod shape having a connecting pin mounting portion at the center and swinging around the connecting pin mounting portion. Things can also be used.

[Example 2]
As shown in FIG. 4, the tension adjusting device 7 </ b> B according to the second embodiment includes a sub-balance member 22 that is a sub-balance member only at one end of a main balance member 21 that is a main balance member. 8c can be applied to an elevator apparatus that drives the elevator car 4 and the counterweight 5 as lifting bodies. In the tension adjusting device 7B of this example, the main rope 8a is connected to one end of the subbalance member 22 via the connecting pin 27, the connecting rope 31, and the rope end fitting 35, and the other end of the subbalance member 22 is connected to the other end of the subbalance member 22. The main rope 8b is connected via the connecting pin 28, the connecting rope 32 and the rope end fitting 36, and the main rope 8c is connected to the other end of the main balance member 21 via the connecting pin 29, the connecting rope 33 and the rope end fitting 37. Connected. The other portions are the same as those of the tension adjusting device 7A according to the first embodiment, and therefore the corresponding portions are denoted by the same reference numerals and description thereof is omitted. In order to keep the balance of force, the length of the main balance member on the main rope 8c side is set to be twice as long as the other.

  Since the tension adjusting device 7B according to the second embodiment is configured in this way, length unbalance occurs between the three main ropes 8a to 8c connected to the car 4 and the counterweight 5, As a result, even when an imbalance occurs in the tension acting between the main ropes 8a to 8c, it can be automatically resolved. First, when elongation occurs in the main rope 8b after the elevator apparatus is installed, the tension acting on the main rope 8b is reduced and the tension acting on the main rope 8a is increased. Therefore, the main rope 8a and the main rope 8b The sub-balance member 22 swings counterclockwise about the connecting pin 25 by an angle corresponding to the difference in tension between the first and second pins. Thereby, since the length of the main rope 8a and the main rope 8b is adjusted, the tension imbalance between the main rope 8a and the main rope 8b is automatically eliminated. When elongation occurs in the main rope 8a, the subbalance member 22 swings clockwise around the connecting pin 25, and the tension unbalance between the main rope 8a and the main rope 8b is automatically set. It will be resolved. These operations are the same as those of the tension adjusting device 7A according to the first embodiment.

  On the other hand, when the tension on the main ropes 8a and 8b connected to the sub balance member 22 is higher than the tension on the main rope 8c connected to the other end of the main balance member 21, the tension difference is increased. Since the main balance member 21 rotates counterclockwise about the connecting pin 24 by the corresponding angle, the unbalance between the tension on the main ropes 8a and 8b and the tension on the main rope 8c is automatically eliminated. The Further, when the tension on the main rope 8c side becomes higher than the tension on the main ropes 8a and 8b connected to the sub balance member 22, the main balance member 21 is connected by an angle corresponding to the tension difference. Since it rotates clockwise around the pin 24, the unbalance between the tension on the main ropes 8a, 8b and the tension on the main rope 8c is automatically eliminated.

  The tension adjusting device 7B according to the second embodiment connects two of the three main ropes 8a to 8c to both ends of the subbalance member 22 attached to one end of the main balance member 21, and the other one. Is connected to the other end of the main balance member 21, and can be applied to an elevator apparatus of a type that drives the elevator car 4 and the counterweight 5 that are lifting bodies using the three main ropes 8a to 8c. The other points are the same as those of the tension adjusting device 7A according to the first embodiment.

Example 3
As shown in FIG. 5, the tension adjusting device 7 </ b> C according to the third embodiment uses a bell crank-shaped main balance member 21 as a main balance member and a main balance via connecting pins 25 and 26 as a sub balance member. The auxiliary pulleys 41 and 42 rotatably connected to both ends of the member 21 are used. The main ropes 8 a and 8 b connected by using the rope end fitting 43 are wound around the auxiliary pulley 41. Further, the main ropes 8 c and 8 d connected with the rope end fitting 44 are wound around the auxiliary pulley 42. The rope end fittings 43 and 44 are arranged at positions that do not interfere with the auxiliary pulleys 41 and 42 even when the auxiliary pulleys 41 and 42 rotate according to the extension of the main ropes 8a to 8d. The other portions are the same as those of the tension adjusting device 7A according to the first embodiment, and therefore the corresponding portions are denoted by the same reference numerals and description thereof is omitted.

  Since the tension adjusting device 7C according to the third embodiment is configured in this manner, length unbalance occurs between the four main ropes 8a to 8d connected to the car 4 and the counterweight 5, As a result, even when an imbalance occurs in the tension acting between the main ropes 8a to 8d, it can be automatically resolved. First, when elongation occurs in the main rope 8b after the elevator apparatus is installed, the tension acting on the main rope 8b is reduced and the tension acting on the main rope 8a is increased. Therefore, the main rope 8a and the main rope 8b The auxiliary pulley 41 rotates counterclockwise about the connecting pin 25 by an angle corresponding to the tension difference between the first and second pins. Thereby, since the length of the main rope 8a and the main rope 8b is adjusted, the tension imbalance between the main rope 8a and the main rope 8b is automatically eliminated. When elongation occurs in the main rope 8a, the sub pulley 41 rotates clockwise around the connecting pin 25, and the tension unbalance between the main rope 8a and the main rope 8b is automatically eliminated. Is done.

  On the other hand, when the tension on the main ropes 8a and 8b wound around the auxiliary pulley 41 becomes higher than the tension on the main ropes 8c and 8d wound around the auxiliary pulley 42, the tension difference is determined. Since the main balance member 21 swings counterclockwise about the connecting pin 24 by the angle, the unbalance between the tension on the main ropes 8a and 8b and the tension on the main ropes 8c and 8d is automatically performed. It will be resolved. Further, when the tension on the main ropes 8c, 8d wound around the auxiliary pulley 42 is higher than the tension on the main ropes 8a, 8b wound around the auxiliary pulley 41, the tension difference depends on the tension difference. Since the main balance member 21 swings clockwise about the connecting pin 24 by the angle, the unbalance between the tension on the main ropes 8a and 8b and the tension on the main ropes 8c and 8d is automatically eliminated. Is done.

  Thus, the tension adjusting device 7C according to the third embodiment can exhibit the same effects as those of the tension adjusting device 7A according to the first embodiment and the tension adjusting device 7B according to the second embodiment.

Example 4
As shown in FIG. 6, the tension adjusting device 7D according to the fourth embodiment uses a main pulley 51 that is rotatably connected to the support beam 6 via a connecting pin 24 as a main balance member, and a sub-balance member. As described above, bell crank-shaped auxiliary balance members 22 and 23 in which arms having the same length are formed on both sides of the bent portion are used. The sub balance members 22 and 23 are connected to a main pulley 51 which is a main balance member via connection pins 25 and 26. The other portions are the same as those of the tension adjusting device 7A according to the first embodiment, and therefore the corresponding portions are denoted by the same reference numerals and description thereof is omitted.

  Since the tension adjusting device 7D according to the fourth embodiment is configured in this manner, length unbalance occurs between the four main ropes 8a to 8d connected to the car 4 and the counterweight 5, As a result, even when an imbalance occurs in the tension acting between the main ropes 8a to 8d, it can be automatically resolved. First, when elongation occurs in the main rope 8b after the elevator apparatus is installed, the tension acting on the main rope 8b is reduced and the tension acting on the main rope 8a is increased. Therefore, the main rope 8a and the main rope 8b The sub-balance member 22 swings counterclockwise about the connecting pin 25 by an angle corresponding to the difference in tension between the first and second pins. Thereby, since the length of the main rope 8a and the main rope 8b is adjusted, the tension imbalance between the main rope 8a and the main rope 8b is automatically eliminated. When elongation occurs in the main rope 8a, the subbalance member 22 swings clockwise around the connecting pin 25, and the tension unbalance between the main rope 8a and the main rope 8b is automatically set. It will be resolved.

  Further, when the main rope 8d is stretched after the elevator apparatus is installed, the tension acting on the main rope 8d is reduced and the tension acting on the main rope 8c is increased, so that the main rope 8c and the main rope 8d are increased. The subbalance member 23 swings counterclockwise about the connecting pin 26 by an angle corresponding to the difference in tension between the first and second pins. Thereby, since the length of the main rope 8c and the main rope 8d is adjusted, the tension imbalance between the main rope 8c and the main rope 8d is automatically eliminated. When elongation occurs in the main rope 8c, the sub balance member 23 swings clockwise around the connecting pin 26, and the tension unbalance between the main rope 8c and the main rope 8d is automatically set. It will be resolved.

  On the other hand, if the tension on the side of the main ropes 8a, 8b connected to the sub balance member 22 is higher than the tension on the side of the main ropes 8c, 8d connected to the sub balance member 23, depending on the tension difference Since the main pulley 51 rotates counterclockwise about the connecting pin 24 by the angle, the tension unbalance between the auxiliary balance member 22 side and the auxiliary balance member 23 side is automatically eliminated. . When the tension on the side of the main ropes 8c, 8d connected to the sub-balance member 23 is higher than the tension on the side of the main ropes 8a, 8b connected to the sub-balance member 22, an angle corresponding to the tension difference Therefore, since the main pulley 51 rotates clockwise about the connecting pin 24, the tension imbalance between the auxiliary balance member 22 side and the auxiliary balance member 23 side is automatically eliminated.

  As described above, the tension adjusting device 7D according to the fourth embodiment has the same effects as those of the tension adjusting device 7A according to the first embodiment, the tension adjusting device 7B according to the second embodiment, and the tension adjusting device 7C according to the third embodiment. Can demonstrate.

Example 5
As shown in FIG. 7, the tension adjusting device 7E according to the fifth embodiment uses, as a main balance member, a main pulley 51 that is rotatably connected to the support beam 6 via a connection pin 24, and a sub-balance member. As described above, the sub pulleys 41 and 42 that are rotatably connected to the distal end portion of the connecting rope 52 wound around the main pulley 51 are used. The sub pulley 41 is rotatably connected to a pulley mounting body 53 via a connecting pin 25, and a connecting rope 54 is attached to the pulley mounting body 53. The connecting rope 54 is connected to one end of the connecting rope 52 through the end fitting 55. On the other hand, the auxiliary pulley 42 is rotatably connected to the auxiliary pulley attachment body 56 via the connection pin 26, and a connection rope 57 is attached to the auxiliary pulley attachment body 56. The connecting rope 57 is connected to the other end of the connecting rope 52 via the end fitting 58. The main ropes 8 a and 8 b connected by using the rope end fitting 43 are wound around the auxiliary pulley 41. Further, the main ropes 8 c and 8 d connected with the rope end fitting 44 are wound around the auxiliary pulley 42. The rope end fittings 43 and 44 are arranged at positions that do not interfere with the auxiliary pulleys 41 and 42 even when the auxiliary pulleys 41 and 42 rotate according to the extension of the main ropes 8a to 8d.

  Since the tension adjusting device 7E according to the fifth embodiment is configured in this way, length unbalance occurs between the four main ropes 8a to 8d connected to the car 4 and the counterweight 5, As a result, even when an imbalance occurs in the tension acting between the main ropes 8a to 8d, it can be automatically resolved. First, when elongation occurs in the main rope 8b after the elevator apparatus is installed, the tension acting on the main rope 8b is reduced and the tension acting on the main rope 8a is increased. Therefore, the main rope 8a and the main rope 8b The auxiliary pulley 41 rotates counterclockwise about the connecting pin 25 by an angle corresponding to the tension difference between the first and second pins. Thereby, since the length of the main rope 8a and the main rope 8b is adjusted, the tension imbalance between the main rope 8a and the main rope 8b is automatically eliminated. When elongation occurs in the main rope 8a, the sub pulley 41 rotates clockwise around the connecting pin 25, and the tension unbalance between the main rope 8a and the main rope 8b is automatically eliminated. Is done.

  Further, when the main rope 8d is stretched after the elevator apparatus is installed, the tension acting on the main rope 8d is reduced and the tension acting on the main rope 8c is increased, so that the main rope 8c and the main rope 8d are increased. The sub pulley 42 rotates counterclockwise about the connecting pin 26 by an angle corresponding to the difference in tension between the first and second pins. Thereby, since the length of the main rope 8c and the main rope 8d is adjusted, the tension imbalance between the main rope 8c and the main rope 8d is automatically eliminated. When elongation occurs in the main rope 8c, the auxiliary pulley 42 rotates clockwise around the connecting pin 26, and tension unbalance between the main rope 8c and the main rope 8d is automatically eliminated. Is done.

  On the other hand, when the tension on the side of the main ropes 8a and 8b connected to the auxiliary pulley 41 is higher than the tension on the side of the main ropes 8c and 8d connected to the auxiliary pulley 42, an angle corresponding to the difference in tension. Therefore, since the main pulley 51 rotates counterclockwise around the connecting pin 24, the tension imbalance between the auxiliary pulley 41 side and the auxiliary pulley 42 side is automatically eliminated. When the tension on the side of the main ropes 8c, 8d connected to the auxiliary pulley 42 is higher than the tension on the side of the main ropes 8a, 8b connected to the auxiliary pulley 41, only an angle corresponding to the tension difference is obtained. Since the main pulley 51 rotates clockwise around the connecting pin 24, the tension imbalance between the auxiliary pulley 41 side and the auxiliary pulley 42 side is automatically eliminated.

  As described above, the tension adjusting device 7E according to the fifth embodiment also includes the tension adjusting device 7A according to the first embodiment, the tension adjusting device 7B according to the second embodiment, the tension adjusting device 7C according to the third embodiment, and the fourth embodiment. The same effect as the tension adjusting device 7D can be exhibited.

Example 6
As shown in FIG. 8, the tension adjusting device 7 </ b> F according to the sixth embodiment is characterized in that the end of the connection rope 52 is fixed to the main pulley 51 instead of winding the connection rope 52 around the main pulley 51. . The other portions are the same as those of the tension adjusting device 7E according to the fifth embodiment, and therefore the corresponding portions are denoted by the same reference numerals and description thereof is omitted.

  Since the tension adjusting device 7F according to the sixth embodiment is configured as described above, in the same manner as the tension adjusting device 7E according to the fifth embodiment, when any of the four main ropes 8a to 8d is elongated. The tension imbalance acting on the main ropes 8a to 8d can be automatically eliminated. Therefore, even with the tension adjusting device 7F according to the sixth embodiment, the tension adjusting device 7A according to the first embodiment, the tension adjusting device 7B according to the second embodiment, the tension adjusting device 7C according to the third embodiment, and the tension according to the fourth embodiment. The same effects as those of the adjusting device 7D and the tension adjusting device 7E according to the fifth embodiment can be exhibited.

Example 7
As shown in FIG. 9, the tension adjusting device 7G according to the seventh embodiment includes a main support beam 6a that fixes the support beam 6 to fixed parts such as the hoistway 1, the car 4, the counterweight 5, and the like. The secondary support beam 6b is connected to the beam 6a via a vibration isolation member 61 such as a vibration isolation rubber, and the main balance member 21 as the main balance member is rotatably connected to the secondary support beam 6b. Features. The other parts are the same as those of the tension adjusting device 7A according to the first embodiment, and thus the corresponding parts are denoted by the same reference numerals and description thereof is omitted.

  Since the tension adjusting device 7G according to the seventh embodiment is configured as described above, the tension adjusting device 7G has the same effect as the tension adjusting device 7A according to the first embodiment, and vibration generated on the main support beam 6a side due to an external factor. Can be absorbed by the vibration isolating member 61, and therefore the seismic resistance can be improved as compared with the tension adjusting device 7A according to the first embodiment.

  In the seventh embodiment, the main balance member 21 of the tension adjusting device 7A according to the first embodiment is connected to the auxiliary support beam 6b. However, the main balance member 21 of the tension adjusting device 7B according to the second embodiment, and the third embodiment. The main balance member 21 of the tension adjusting device 7C according to the above, the main pulley 51 of the tension adjusting device 7D according to the fourth embodiment, the main pulley 51 of the tension adjusting device 7E according to the fifth embodiment, or the tension adjusting device according to the sixth embodiment. The main pulley 51 of 7F can also be connected to the sub-support beam 6b.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, in Examples 1 to 7 described above, the tension adjusting device has a two-stage configuration including a main balance member connected to the support beam and a sub-balance member connected to the main balance member. A three-stage structure in which a third-stage sub-balance member is further connected to both ends of the member may be employed. If a three-stage tension adjusting device is used, a total of eight main ropes can be connected. In the first to seventh embodiments described above, only one set of two-stage tension adjusting devices is provided, but a plurality of two-stage or three-stage tension adjusting devices may be provided. By providing a plurality of sets of tension adjusting devices, it is possible to apply to an elevator device that drives a lifting body with a larger number of main ropes.

4 Carrying cage 5 Balance weight 6 Support beam 7 (7A-7G) Tension adjusting device 8 (8a-8d) Main rope 9 Hoisting machine 21 Main balance member 22, 23 Subbalance member 24-30 Connecting pin 41, 42 Sub pulley 51 Main pulley 52 Connecting rope

Claims (9)

A plurality of main ropes for transmitting the driving force of the hoisting machine to the lifting body, a tension adjusting device for automatically eliminating tension unbalance between the plurality of main ropes, and a support beam for installing the tension adjusting device In an elevator apparatus equipped with
The tension adjusting device includes a main balance member rotatably connected to the support beam via a connection pin, and a sub-balance member rotatably connected to the main balance member via a connection pin. When the number of the main ropes is an even number, the main ropes are dispersed and connected to the sub-balance member, and when the number of the main ropes is an odd number, the main ropes are An elevator apparatus characterized by being dispersedly connected to a main balance member and the sub-balance member.   At least one of the main balance member and the sub-balance member is a balance member that swings around the connection pin, with arm portions formed symmetrically on both sides of the connection pin through the setting portion. The elevator apparatus according to claim 1.   The balance member is a bell crank in which arms having the same length are formed at angles on both sides of a bent portion, and the connecting pin is set in the bent portion. The elevator apparatus as described in.   The elevator apparatus according to claim 1, wherein at least one of the main balance member and the sub balance member is a pulley that rotates around the connection pin.   The said sub balance member is a pulley, The connection body of the two said main ropes was wound around the sub pulley which is the said sub balance member, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. Elevator equipment.   The main balance member is a pulley, a connecting rope having auxiliary pulley attachments attached to both ends is wound around the main pulley which is the main balance member, and the auxiliary balance member is attached to the auxiliary pulley attachment member via the connection pin. The elevator apparatus according to any one of claims 1 to 5, wherein the auxiliary pulley is rotatably attached.   The main balance member is a pulley, and the other end of a connection rope having a sub pulley attachment body attached to one end is fixed to the main pulley which is the main balance member, and the sub pulley attachment body is connected to the main pulley via the connection pin. The elevator apparatus according to any one of claims 1 to 5, wherein an auxiliary pulley that is an auxiliary balance member is rotatably attached.   The support beam is composed of a main support beam fixed to a fixed portion and a sub-support beam connected to the main support beam via a vibration isolation member, and the main balance member is rotated on the sub-support beam. The elevator apparatus according to any one of claims 1 to 7, wherein the elevator apparatus is connected in a possible manner. In the tension adjusting device that is installed on the support beam and automatically cancels the tension imbalance between the main ropes that transmit the driving force of the hoisting machine to the lifting body,
A main balance member rotatably connected to the support beam via a connection pin; and a sub-balance member rotatably connected to the main balance member via a connection pin. When the number is an even number, these main ropes are dispersed and connected to the sub balance member, and when the number of the main ropes is an odd number, these main ropes are connected to the main balance member and the sub balance member. A main rope tension adjusting device dispersed and connected to a balance member.