WO2024018564A1

WO2024018564A1 - Elevator device

Info

Publication number: WO2024018564A1
Application number: PCT/JP2022/028222
Authority: WO
Inventors: 大輔中澤; 英一齊藤; 郁香水谷; 誠治渡辺
Original assignee: 三菱電機株式会社
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2024-01-25

Abstract

An elevator device according to the present disclosure includes a car; a counterweight; an elongated body that includes a first linear portion that is connected between the car and the counterweight and that is suspended from the car, a second linear portion that is suspended from the counterweight, and a curved portion connecting the first linear portion and the second linear portion; a first roller and a second roller that sandwich the first linear portion of the elongated body to guide the elongated body; and a third roller and a fourth roller that sandwich the second linear portion of the elongated body to guide the elongated body. A rotational axis of the first roller is parallel to a rotational axis of the second roller. Regarding positions in the vertical direction, a vertical position of the rotational axis of the first roller differs from a vertical position of the rotational axis of the second roller. A rotational axis of the third roller is parallel to a rotational axis of the fourth roller. Regarding positions in the vertical direction, a vertical position of the rotational axis of the third roller differs from a vertical position of the rotational axis of the fourth roller.

Description

elevator equipment

The present disclosure relates to an elevator device.

In conventional elevator equipment, a long body such as a counterbalancing rope is installed between the car and the counterweight in order to compensate for the imbalance in the weight balance between the car and the counterweight due to changes in the car position. (For example, see Patent Document 1). A tension wheel is suspended from the bottom of the counterbalancing rope. Vibration of the balance rope is suppressed by applying tension to the balance rope due to the load of the tension wheel.

Japanese Patent Publication No. 2001-247276

When the load of the tension wheel is added to the load of the balance rope, the load on the connection part of the balance rope to the car increases accordingly, and the load on the connection part of the balance rope to the counterweight also increases accordingly. Furthermore, the load on equipment such as a drive device for running the car becomes large. This results in an increase in the size of the elevator equipment and an expansion of the installation space for the equipment, resulting in an increase in the size of the elevator device.

The present disclosure has been made in order to solve the above-mentioned problems, and is capable of suppressing the increase in size of an elevator device, and suppressing an increase in the horizontal shaking of a long body suspended between a car and a counterweight. It is an object of the present invention to provide an elevator device that can also be suppressed.

The elevator device according to the present disclosure includes a car, a counterweight, a first linear part connected between the car and the counterweight, and suspended from the car, a second linear part suspended from the counterweight, and a first straight part connected between the car and the counterweight. An elongated body having a curved part connecting a first straight part and a second straight part, a first roller and a second roller that guide the elongated body across the first straight part of the elongated body, and an elongated body. a third roller and a fourth roller that guide the elongated body across the second straight part of the body, the rotational axis of the first roller is parallel to the rotational axis of the second roller, and the rotational axis of the first roller is parallel to the rotational axis of the second roller. Regarding the position, the vertical position of the rotation axis of the first roller is different from the vertical position of the rotation axis of the second roller, and the rotation axis of the third roller is parallel to the rotation axis of the fourth roller, and the rotation axis of the third roller is parallel to the rotation axis of the fourth roller. Regarding the position of , the vertical position of the rotation axis of the third roller is different from the vertical position of the rotation axis of the fourth roller.

According to the present disclosure, it is possible to provide an elevator device that can suppress the increase in size of the elevator device and can also suppress an increase in the horizontal sway of a long body suspended between a car and a counterweight. It becomes possible.

1 is a configuration diagram showing an elevator device according to Embodiment 1. FIG. FIG. 2 is a side view showing main parts of the elongate body guiding device according to the first embodiment. FIG. 2 is a perspective view showing main parts of the elongate body guiding device according to the first embodiment. FIG. 3 is a diagram for explaining lateral vibrations that occur in the balancing rope when the car runs. FIG. 2 is an explanatory diagram regarding installation positions of a first roller, a second roller, a third roller, and a fourth roller in the elongate body guiding device according to the first embodiment. FIG. 2 is an explanatory diagram regarding installation positions of a first roller, a second roller, a third roller, and a fourth roller in the elongate body guiding device according to the first embodiment. FIG. 3 is a perspective view showing a long body guiding device according to a second embodiment. FIG. 7 is a cross-sectional view for explaining the arrangement of rollers of the elongate body guiding device according to Embodiment 2; FIG. 7 is a side view illustrating the arrangement of rollers of the elongate body guiding device according to Embodiment 2; FIG. 7 is a perspective view showing a long body guiding device according to Embodiment 3; FIG. 7 is a sectional view showing a main part of a long body guiding device according to Embodiment 3; FIG. 11 is a side view showing a state in which the emergency stop device of the elevator device is activated and the lower curved portion of the balancing rope jumps up in Embodiment 4; FIG. 7 is a perspective view showing a long body guiding device according to a fourth embodiment. FIG. 12 is a perspective view showing a state in which the winding machine brake or the emergency stop device is activated and the curved portion of the balance rope jumps up in the elongate body guiding device according to the fourth embodiment. FIG. 7 is a perspective view showing a modified elongate body guiding device according to Embodiment 4;

Hereinafter, embodiments will be described with reference to the drawings. Common or corresponding elements in each figure are denoted by the same reference numerals, and description thereof will be simplified or omitted.

Embodiment 1.
FIG. 1 is a configuration diagram showing an elevator apparatus according to a first embodiment. In the present disclosure, as shown in FIG. 1, a three-axis orthogonal coordinate system including an X-axis, a Y-axis, and a Z-axis will be used, and the positive direction of the X-axis will be described as being vertically downward. In addition, in this disclosure, when referring to the position, shape, orientation, etc. of each component, unless otherwise specified, it means the position, shape, orientation, etc. when each part of the elevator device is stationary. do.

In FIG. 1, a machine room 2 is provided above a hoistway 1 of an elevator system. The machine room 2 includes a hoisting machine 4 having a driving sheave 3, a deflecting sheave 5 disposed apart from the driving sheave 3, and a control panel 6 corresponding to a control device for controlling the operation of the elevator system. It is provided. A car 7 and a counterweight 8 are provided in the hoistway 1 so as to be movable in the vertical direction. The hoist 4 corresponds to a drive device that drives the car 7 and the counterweight 8. Note that the elevator device of the present disclosure is not limited to the illustrated example, but can also be applied to an elevator device in which the hoisting machine 4 and the control panel 6 are arranged in the hoistway 1 and the machine room 2 is not provided.

A suspension body 9 for suspending a car 7 and a counterweight 8 is wound around the drive sheave 3 and the deflection sheave 5. A car 7 is connected to one end of the hanging body 9. A counterweight 8 is connected to the other end of the suspension body 9. As the hanging body 9, for example, a rope or a belt is used. The drive sheave 3 is rotated by the driving force of the motor of the hoist 4. Each of the car 7 and the counterweight 8 moves up and down within the hoistway 1 as the driving sheave 3 is rotated. The car 7 and the counterweight 8 move in opposite directions.

A counterbalancing rope 12 is suspended between the car 7 and the counterweight 8. The balance rope 12 corresponds to a flexible elongated body for compensating weight balance. By suspending the balance rope 12 between the car 7 and the counterweight 8, the imbalance in weight balance between the car 7 side and the balance weight 8 side is compensated for. The elongated body for weight balance compensation in the present disclosure is not limited to a rope-like body like the balancing rope 12. The elongated body in the present disclosure may be, for example, an elongated article formed by coating a chain with resin. For example, Whisperflex ("Whisperflex" is a trademark) or the like may be used as a long article formed by coating a chain with resin. Further, the elongated body for weight balance compensation in the present disclosure may be belt-shaped.

The car 7 is provided with a car-side rope hanging part 10. The car-side rope hanging part 10 corresponds to a car-side elongated body hanging part. A counterweight side rope hanging part 11 is provided on the counterweight 8. The counterweight side rope hanging part 11 corresponds to a counterweight side long body hanging part. As shown in FIG. 1, the car-side rope hanging part 10 is preferably provided at the lower part of the car 7. It is desirable that the counterweight side rope hanging part 11 be provided on the side of the counterweight 8.

One end of the balancing rope 12 is connected to the car side rope hanging part 10. The other end of the balance rope 12 is connected to the balance weight side rope hanging part 11. The balance rope 12 is suspended by its own weight between the car side rope suspension part 10 and the counterweight side rope suspension part 11. That is, the balance rope 12 does not suspend the tension wheel.

The balancing rope 12 has a first straight section 15 suspended from the car 7 , a second straight section 16 suspended from the counterweight 8 , and a space between the lower end of the first straight section 15 and the lower end of the second straight section 16 . It has a curved part 13 that connects. Specifically, the first straight portion 15 is a portion that extends vertically downward in a straight line from the car-side rope hanging portion 10 to a point where the balance rope 12 starts curving. Similarly, the second straight portion 16 is specifically a portion that extends vertically downward in a straight line from the balance weight side rope suspension portion 11 to the point where the balance rope 12 starts curving. be. The curved portion 13 may have a semicircular shape. As described above, in this embodiment, the tension wheel in contact with the curved portion 13 is not provided.

The horizontal distance between the car side rope hanging part 10 and the counterweight side rope hanging part 11 is called the "distance between hanging points" and is represented by the symbol D. The distance D between the hanging points corresponds to the horizontal distance between the elongated body hanging parts. The distance D between hanging points corresponds to the horizontal distance between the center line of the first straight section 15 and the center line of the second straight section 16.

The car 7 and the counterweight 8 move in the vertical direction while maintaining the value of the distance D between hanging points. Below the balance rope 12, a portion of the balance rope 12 is bent to form a curved portion 13. When the car 7 and the counterweight 8 move, the balance rope 12 changes the length of the first straight section 15 and the second straight section 16 while maintaining the position where the curved section 13 is formed. Moving. That is, when the car 7 descends and the counterweight 8 rises, the first straight section 15 becomes shorter and the second straight section 16 becomes longer. At this time, the position and shape of the curved portion 13 are maintained. Similarly, when the car 7 goes up and the counterweight 8 goes down, the first straight part 15 becomes longer and the second straight part 16 becomes shorter. Also at this time, the position and shape of the curved portion 13 are maintained.

A car shock absorber (not shown) and a counterweight shock absorber (not shown) are installed on the bottom surface of the hoistway 1 in a pit section that is the lower end of the hoistway 1. The car shock absorber is a device for alleviating the impact that the car 7 receives when the car 7 collides with the floor, that is, the bottom surface of the hoistway 1. Further, the counterweight shock absorber is a device for alleviating the impact that the counterweight 8 receives when the counterweight 8 collides with the floor, that is, the bottom surface of the hoistway 1. Further, at the lower end of the hoistway 1, a long body guide device 14 for guiding the balance rope 12 is installed.

FIG. 2 is a side view showing main parts of the elongate body guiding device 14 according to the first embodiment. FIG. 3 is a perspective view showing main parts of the elongate body guiding device 14 according to the first embodiment. The elongate body guiding device 14 includes a first roller 14a and a second roller 14b. Each of the first roller 14a and the second roller 14b is in contact with the first straight portion 15 of the balancing rope 12. The first roller 14a and the second roller 14b guide the balancing rope 12 while rotating, with the first straight portion 15 of the balancing rope 12 being sandwiched between the first roller 14a and the second roller 14b. The rotation axis of the first roller 14a is parallel to the rotation axis of the second roller 14b. Regarding the vertical position, the vertical position of the rotation axis of the first roller 14a is different from the vertical position of the rotation axis of the second roller 14b. The first roller 14a and the second roller 14b correspond to a first roller pair.

The elongate body guiding device 14 includes a third roller 14c and a fourth roller 14d. Each of the third roller 14c and the fourth roller 14d is in contact with the second straight portion 16 of the balancing rope 12. The third roller 14c and the fourth roller 14d guide the balancing rope 12 while rotating, with the second straight portion 16 of the balancing rope 12 being sandwiched between the third roller 14c and the fourth roller 14d. The rotation axis of the third roller 14c is parallel to the rotation axis of the fourth roller 14d. Regarding the vertical position, the vertical position of the rotation axis of the third roller 14c is different from the vertical position of the rotation axis of the fourth roller 14d. The third roller 14c and the fourth roller 14d correspond to a second roller pair.

The elongated body guide device 14 includes a roller position fixing member 14i. The roller position fixing member 14i fixes the rotating shafts of the first roller 14a, the second roller 14b, the third roller 14c, and the fourth roller 14d so that their positions do not move. That is, the roller position fixing member 14i is configured such that the position of the rotation axis of each of the first roller 14a, second roller 14b, third roller 14c, and fourth roller 14d is set to any of the X-axis, Y-axis, and Z-axis. Each roller is supported so as not to be displaced in any direction. In this example, the roller position fixing member 14i is fixed to the pit portion. In this embodiment, since the positions of the rotational axes of the first roller 14a, second roller 14b, third roller 14c, and fourth roller 14d are immovable, when the car 7 and the counterweight 8 move up and down, , it becomes possible to reliably maintain the shape and size of the curved portion 13 of the balancing rope 12. Further, since there is no need for a mechanism for moving the positions of the respective rotational axes of the first roller 14a, second roller 14b, third roller 14c, and fourth roller 14d, the structure can be simplified and miniaturized.

The roller position fixing member 14i fixes the rotational axes of the first roller 14a, the second roller 14b, the third roller 14c, and the fourth roller 14d so that the positions of the respective rotation axes in the horizontal direction do not change. This corresponds to a roller support section that supports the second roller 14b, the third roller 14c, and the fourth roller 14d.

Each of the first roller 14a, second roller 14b, third roller 14c, and fourth roller 14d may be, for example, a metal roller, or a metal roller coated with a resin. Alternatively, it may be a metal roller coated with rubber, a resin roller, or a rubber roller.

Each of the first roller 14a, second roller 14b, third roller 14c, and fourth roller 14d may have a bearing on its rotation axis. The bearing may be a rolling bearing.

The rotational axes of the first roller 14a, second roller 14b, third roller 14c, and fourth roller 14d are perpendicular to the plane including the curved portion 13. That is, these rotational axes are parallel to the Z-axis direction in FIG. 1 and also parallel to the rotational axis of the drive sheave 3.

Here, the relationship between the lateral vibration that occurs in the balancing rope 12 when the car 7 runs and the arrangement of each of the first roller 14a to the fourth roller 14d will be explained using FIG. 4. FIG. 4 is a diagram for explaining the lateral vibration that occurs in the balance rope 12 when the car 7 runs. FIG. 4A shows a state in which the car 7 runs when the balancing rope 12 is suspended between the car 7 and the counterweight 8 without the elongated body guide device 14 of FIGS. 1 to 3 installed. FIG. 2 is a schematic diagram showing a state in which lateral vibration occurs in the balance rope 12. When the car 7 travels upward or downward, the acceleration/deceleration causes a pendulum-like lateral vibration below the balancing rope 12, as shown in FIG. 4A. Here, the lateral vibration that occurs in the balance rope 12 is a vibration that occurs in the left-right direction within a plane that includes the curved portion 13, that is, within the XY plane.

FIG. 4B is a schematic diagram showing the lateral vibration of the balance rope 12 when the car 7 runs when only two rollers, the second roller 14b and the fourth roller 14d, are installed in the elongated body guide device 14. be. When the car 7 travels upward or downward, lateral vibrations occur in the balance rope 12 due to acceleration and deceleration. In the example of FIG. 4B, when horizontal vibration occurs in the balance rope 12, the leftward displacement of the first straight portion 15 of the balance rope 12 is restrained by the second roller 14b, and the pendulum-like displacement is reduced. It shows. On the other hand, in the example of FIG. 4B, since no roller is disposed inside the curved portion 13 below the balancing rope 12, the displacement of the curved portion 13 in the inner direction is not restrained, and This shows a state in which a displacement has occurred. Further, when the balance rope 12 collides with the roller, local bending displacement occurs in the balance rope 12 using the roller as a fulcrum. This bending displacement becomes transverse vibration with a short wavelength and propagates through the balance rope 12.

FIG. 4C shows the state of the counterbalance rope 12 when the car 7 is running when the first roller 14a, second roller 14b, third roller 14c, and fourth roller 14d of the elongate body guiding device 14 are installed. FIG. The effect when four rollers are arranged as shown in FIG. 4C will be explained. When lateral vibration occurs in the balance rope 12, as explained using FIG. 4B, the second roller 14b disposed outside the lower curved part 13 of the balance rope 12 moves The leftward displacement of is restrained. The fourth roller 14d restrains the second straight portion 16 of the balancing rope 12 from shifting to the right. The first roller 14a restrains the rightward displacement of the first straight section 15 of the balancing rope 12, and also regulates the hanging shape of the balancing rope 12 so that the first straight section 15 becomes vertical. That is, the first roller 14a regulates the hanging shape of the balance rope 12 so that the first straight portion 15 is maintained perpendicular to the YZ plane. The third roller 14c restricts leftward displacement of the second straight portion 16 of the balancing rope 12, and also restricts the hanging shape of the balancing rope 12 so that the second straight portion 16 is vertical. That is, the third roller 14c regulates the hanging shape of the balance rope 12 so that the second straight portion 16 is maintained perpendicular to the YZ plane. As described above, according to the arrangement of the rollers in FIG. 4C, it is possible to reliably suppress pendulum-like lateral vibrations that may occur in the balancing rope 12 when the car 7 runs.

As described above, in the elongate body guiding device 14, the first straight portion 15 of the balancing rope 12 is sandwiched between the first roller 14a and the second roller 14b, which are arranged at different heights in the vertical direction. It will be done. Thereby, the bending of the balancing rope 12 is restrained at the position where the first roller 14a and the second roller 14b are arranged. Therefore, it is possible to suppress propagation of short-wavelength vibrations caused by a starting shock or acceleration/deceleration when the car 7 starts running on the balance rope 12. In contrast, assuming that the first roller 14a and the second roller 14b were at the same height as each other, the bending of the counterbalancing rope 12 at the position where the first roller 14a and the second roller 14b are located Since it is not constrained, vibrations with short wavelengths cannot be prevented from propagating on the balance rope 12.

Similarly, in the elongate body guiding device 14, the second straight portion 16 of the balancing rope 12 is sandwiched between the third roller 14c and the fourth roller 14d, which are arranged at different heights in the vertical direction. . Thereby, the bending of the balancing rope 12 is restrained at the positions where the third roller 14c and the fourth roller 14d are arranged. Therefore, it is possible to suppress propagation of short-wavelength vibrations caused by a starting shock or acceleration/deceleration when the car 7 starts running on the balance rope 12. In contrast, assuming that the third roller 14c and the fourth roller 14d were at the same height, the bending of the balance rope 12 would be Since it is not constrained, vibrations with short wavelengths cannot be prevented from propagating on the balance rope 12.

FIG. 5 is an explanatory diagram regarding the installation positions of the first roller 14a, second roller 14b, third roller 14c, and fourth roller 14d in the elongate body guiding device 14 according to the first embodiment. The first roller 14a, the second roller 14b, the third roller 14c, and the fourth roller 14d may be arranged as shown in FIG. That is, the vertical distance from the lowest point of the curved portion 13 of the balancing rope 12 to the center of the lower one of the first roller 14a and the second roller 14b, and the highest point of the curved portion 13 of the balancing rope 12. At least one of the distances in the vertical direction from the lower part to the center of the lower roller of the third roller 14c and the fourth roller 14d is the distance between the first straight part 15 and the second straight part 16 of the balancing rope 12. Each roller may be arranged so that the distance between the suspension points is half (D/2) or more of the horizontal distance between the suspension points.

As shown in FIG. 4A, when the car 7 runs, a pendulum-like lateral vibration occurs in the balance rope 12. At this time, the displacement of the lateral vibration becomes maximum at a position D/2 above the bottom of the curved portion 13 of the balancing rope 12. On the other hand, by arranging the rollers as described above, each roller restrains the left-right displacement of the balance rope 12 near the position where the displacement of the lateral vibration of the balance rope 12 is maximum. Therefore, by arranging each roller in this manner, it is possible to more reliably suppress the occurrence of lateral vibrations occurring in the balance rope 12 while the car 7 is running.

In the example shown in FIG. 5, the vertical distance from the bottom of the curved portion 13 of the balancing rope 12 to the center of the lower one of the first roller 14a and the second roller 14b is D/2. be equivalent to. Furthermore, the distance in the vertical direction from the bottom of the curved portion 13 of the balancing rope 12 to the center of the lower one of the third roller 14c and the fourth roller 14d is equal to D/2.

Also, the distance in the vertical direction from the bottom of the curved portion 13 of the balancing rope 12 to the center of the lower one of the first roller 14a and the second roller 14b, and the highest point of the curved portion 13 of the balancing rope 12. At least one of the distances in the vertical direction from the bottom to the center of the lower roller of the third roller 14c and the fourth roller 14d is preferably D or less, and 3D/4 or less. is even more preferable. Thereby, each roller restrains the displacement of the balance rope 12 in the left-right direction near the position where the displacement of the lateral vibration of the balance rope 12 is maximum. Therefore, by arranging each roller in this manner, it is possible to more reliably suppress the occurrence of lateral vibrations occurring in the balance rope 12 while the car 7 is running.

FIG. 6 is an explanatory diagram regarding the installation positions of the first roller 14a, second roller 14b, third roller 14c, and fourth roller 14d in the elongate body guiding device 14 according to the first embodiment. The first roller 14a, the second roller 14b, the third roller 14c, and the fourth roller 14d may be arranged as shown in FIG. That is, the vertical distance from the bottom of the curved portion 13 of the balancing rope 12 to the lowest position where the car 7 or the counterweight 8 can move is defined as PD, and from the bottom of the curved portion 13 of the balancing rope 12, Let A be the vertical distance to the upper end of the lower roller among the first roller 14a and the second roller 14b, and let A be the vertical distance between the center of the first roller 14a and the center of the second roller 14b. Each roller may be arranged so as to satisfy the relationship 0<r<(PD-A), where r. The "lowest position to which the car 7 or the counterweight 8 can move" is the same height as the floor surface inside the car 7 when the car 7 collides with the car shock absorber and the car shock absorber is compressed the most. , or corresponds to the same height as the lower end of the counterweight 8 when the counterweight 8 collides with the counterweight buffer and the counterweight buffer is compressed to the maximum.

As shown in FIG. 4B, when lateral vibration occurs in the balance rope 12 and the balance rope 12 collides with the roller, the balance rope 12 locally bends using the roller as a fulcrum, causing lateral vibration with a short wavelength. On the other hand, by arranging each roller so as to satisfy the conditions explained using FIG. is suppressed more reliably. Therefore, it is possible to more reliably suppress the occurrence of lateral vibrations occurring in the balance rope 12 while the car 7 is running.

In the example shown in FIG. 6, the upper end of the upper roller of the first roller 14a and the second roller 14b is located at a lower position than the position of the lowest layer to which the car 7 can move. The upper end of the upper roller of the third roller 14c and the fourth roller 14d is located at a lower position than the lowest position to which the counterweight 8 can move.

If the elevator device is equipped with the elongated body guide device 14 of the present embodiment, the hanging shape of the balancing rope 12 can be brought close to the ideal shape that is less likely to sway, and the ideal shape can be achieved while the car 7 is running. The shape can be maintained reliably. Thereby, it is possible to reliably suppress an increase in the horizontal oscillation of the balance rope 12 when the car 7 and the balance weight 8 are moved. Further, since no load from a tension wheel or the like is applied to the balance rope 12, the burden on equipment such as the car-side rope suspension section 10, the counterweight-side rope suspension section 11, and the hoist 4 can be reduced. Thereby, it is possible to suppress the enlargement of these devices, and it is also possible to suppress the enlargement of the elevator device.

Generally, in a configuration in which a tension wheel is not suspended from the balance rope 12, the shape and radius of curvature of the curved portion 13 formed below the balance rope 12 may deviate from the design values depending on the rigidity of the balance rope 12. . If the car 7 and the counterweight 8 are moved in a state where the shape and radius of curvature of the curved portion 13 of the balance rope 12 largely deviate from the design values, the horizontal oscillation of the balance rope 12 tends to increase. On the other hand, in this embodiment, the shape and radius of curvature of the curved portion 13 of the balancing rope 12 can be adjusted by providing the first roller 14a, the second roller 14b, the third roller 14c, and the fourth roller 14d. , it is possible to reliably maintain a state that conforms to the design values without a tension wheel. Therefore, when the car 7 and the counterweight 8 move, the horizontal swing of the balance rope 12 can be suppressed more reliably.

In this embodiment, the positions of the first roller 14a, second roller 14b, third roller 14c, and fourth roller 14d in the horizontal direction do not change. Therefore, when the car 7 and the counterweight 8 move, the shape and radius of curvature of the curved portion 13 of the counterbalance rope 12 can be more reliably maintained in a state that matches the design values. Further, when the car 7 and the counterweight 8 move, the horizontal distance between the center line of the first straight section 15 and the center line of the second straight section 16 is equal to the distance D between the hanging points. can be maintained more reliably.

In the illustrated example, in the first roller pair, the first roller 14a is arranged closer to the second straight portion 16 than the second roller 14b, that is, the first roller 14a is on the inside and the second roller 14b is on the outside. This was explained using an example arranged in . The present disclosure is not limited to these examples, and the second roller 14b may be arranged closer to the second straight portion 16 than the first roller 14a. That is, the first roller 14a may be placed on the outside and the second roller 14b may be placed on the inside.

In the illustrated example, in the second roller pair, the third roller 14c is arranged closer to the first straight portion 15 than the fourth roller 14d, that is, the third roller 14c is on the inside and the fourth roller 14d is on the outside. This was explained using an example arranged in . The present disclosure is not limited to these examples, and the fourth roller 14d may be arranged closer to the first straight portion 15 than the third roller 14c. That is, the third roller 14c may be placed on the outside and the fourth roller 14d may be placed on the inside.

In the example of FIG. 5, the diameter of the first roller 14a is equal to the diameter of the second roller 14b, and the diameter of the third roller 14c is equal to the diameter of the fourth roller 14d. In the example of FIG. 6, the diameter of the first roller 14a is smaller than the diameter of the second roller 14b, and the diameter of the third roller 14c is smaller than the diameter of the fourth roller 14d. The diameter of the first roller 14a may be larger than the diameter of the second roller 14b, and the diameter of the third roller 14c may be larger than the diameter of the fourth roller 14d.

In the examples of FIGS. 1, 2, 3, and 4C, the rotation axis of the inner first roller 14a is located at a higher position than the rotation axis of the outer second roller 14b. Further, the rotation axis of the inner third roller 14c is located at a higher position than the rotation axis of the outer fourth roller 14d.

In the example of FIGS. 5 and 6, the rotation axis of the inner first roller 14a is located at a lower position than the rotation axis of the outer second roller 14b. Further, the rotation axis of the inner third roller 14c is located at a lower position than the rotation axis of the outer fourth roller 14d.

A groove in contact with the balancing rope 12 may be provided in the outer circumference of the first roller 14a in an annular shape along the circumferential direction of the first roller 14a. A groove in contact with the balancing rope 12 may be provided in the outer circumference of the second roller 14b in an annular shape along the circumferential direction of the second roller 14b. A groove in contact with the balancing rope 12 may be provided in an annular shape along the circumferential direction of the third roller 14c on the outer peripheral portion of the third roller 14c. A groove in contact with the balancing rope 12 may be provided in the outer circumference of the fourth roller 14d in an annular shape along the circumferential direction of the fourth roller 14d. By providing each roller with a groove as described above, each roller can guide the balance rope 12 more appropriately.

Embodiment 2.
Next, a second embodiment will be described with reference to FIGS. 7 to 9, but the explanation will focus on the differences from the first embodiment described above, and common explanations will be simplified or omitted. Further, elements common to or corresponding to those described above are given the same reference numerals. FIG. 7 is a perspective view showing a long body guiding device 14A according to the second embodiment. FIG. 8 is a cross-sectional view for explaining the arrangement of each roller of the elongate body guiding device 14A. FIG. 9 is a side view illustrating the arrangement of each roller of the elongate body guiding device 14A.

According to this embodiment, it is possible to more reliably suppress the vibration component of the balance rope 12 that occurs in the plane direction perpendicular to the plane including the curved portion 13, that is, the Z-axis direction.

In the elevator system shown in FIG. 1, when the car 7 runs without the elongated body guide device 14A installed, the direction along the plane perpendicular to the plane including the lower curved portion 13 of the counterbalancing rope 12, that is, the ZX plane. In the direction along , the balance rope 12 may undergo pendulum-like oscillations. In order to suppress this vibration, in the elongated body guiding device 14A, in addition to the first roller 14a, the second roller 14b, the third roller 14c, and the fourth roller 14d, as shown in FIG. , a sixth roller 14f, a seventh roller 14g, and an eighth roller 14h. As shown in FIG. 7B, the elongate body guide device 14A includes a roller position fixing member 14i that fixes the position of each rotation axis of the first roller 14a to the eighth roller 14h. In this example, the roller position fixing member 14i is fixed to the pit portion. FIG. 7A is a diagram in which illustration of the roller position fixing member 14i is omitted. FIG. 7B is a diagram of the elongate body guiding device 14A including the roller position fixing member 14i. FIG. 8A shows a cross-sectional view at the height of point A shown in FIG. 7A. FIG. 8B shows a cross-sectional view at the height of point B shown in FIG. 7A.

In this embodiment, the first roller 14a, second roller 14b, third roller 14c, and fourth roller 14d are the same as in Embodiment 1, so their description will be omitted.

The fifth roller 14e and the sixth roller 14f guide the balancing rope 12 with the first straight portion 15 of the balancing rope 12 sandwiched between them. Each of the fifth roller 14e and the sixth roller 14f is rotatable while contacting the balancing rope 12. The rotation axis of the fifth roller 14e is parallel to the rotation axis of the sixth roller 14f. The rotation axis of the fifth roller 14e is perpendicular to the rotation axis of the first roller 14a. The rotation axis of the sixth roller 14f is perpendicular to the rotation axis of the second roller 14b. Regarding the vertical position, the vertical position of the rotating shaft of the fifth roller 14e is different from the vertical position of the rotating shaft of the sixth roller 14f. The fifth roller 14e and the sixth roller 14f correspond to a third roller pair.

The seventh roller 14g and the eighth roller 14h guide the balancing rope 12 with the second straight portion 16 of the balancing rope 12 in between. Each of the seventh roller 14g and the eighth roller 14h is rotatable while contacting the balance rope 12. The rotation axis of the seventh roller 14g is parallel to the rotation axis of the eighth roller 14h. The rotation axis of the seventh roller 14g is perpendicular to the rotation axis of the third roller 14c. The rotation axis of the eighth roller 14h is perpendicular to the rotation axis of the fourth roller 14d. Regarding the vertical position, the vertical position of the rotation axis of the seventh roller 14g is different from the vertical position of the rotation axis of the eighth roller 14h. The seventh roller 14g and the eighth roller 14h correspond to a fourth roller pair. The roller position fixing member 14i fixes the respective positions of the first to fourth roller pairs.

As described above, in the elongate body guiding device 14A according to the second embodiment, the first to fourth roller pairs are provided to restrain the displacement of the balance rope 12. For this reason, if the elevator device has the elongated body guide device 14A, in addition to reliably suppressing vibrations in the left and right direction of the surface including the curved portion 13 of the balancing rope 12, Vibration in the direction along the surface can also be suppressed more reliably. In addition, in the illustrated example, there is the following positional relationship. The center of the lower roller of the fifth roller 14e and the sixth roller 14f is located higher than the center of the lower roller of the first roller 14a and the second roller 14b. The center of the upper roller of the fifth roller 14e and the sixth roller 14f is located at a lower position than the center of the upper roller of the first roller 14a and the second roller 14b. The center of the lower roller among the seventh roller 14g and the eighth roller 14h is located at a higher position than the center of the lower roller among the third roller 14c and the fourth roller 14d. The center of the upper roller among the seventh roller 14g and the eighth roller 14h is located at a lower position than the center of the upper roller among the third roller 14c and the fourth roller 14d. The present disclosure is not limited to such an example, and the following positional relationship may be used. The center of the lower roller among the fifth roller 14e and the sixth roller 14f may be located at a lower position than the center of the lower roller among the first roller 14a and the second roller 14b. The center of the upper roller of the fifth roller 14e and the sixth roller 14f may be located at a higher position than the center of the upper roller of the first roller 14a and the second roller 14b. The center of the lower roller among the seventh roller 14g and the eighth roller 14h may be located at a lower position than the center of the lower roller among the third roller 14c and the fourth roller 14d. The center of the upper roller of the seventh roller 14g and the eighth roller 14h may be located at a higher position than the center of the upper roller of the third roller 14c and the fourth roller 14d.

Embodiment 3.
Next, Embodiment 3 will be described with reference to FIGS. 10 and 11, but the explanation will focus on the differences from Embodiment 1 described above, and common explanations will be simplified or omitted. Further, elements common to or corresponding to those described above are given the same reference numerals. FIG. 10 is a perspective view showing a long body guiding device 14B according to the third embodiment. FIG. 11 is a sectional view showing a main part of the elongate body guiding device 14B. FIG. 11A shows the main part of the elongate body guiding device 14B at height A in FIG. FIG. 11B shows the main part of the elongate body guiding device 14B at height B in FIG.

In this embodiment, a configuration example of the elongate body guiding device 14B in a case where a plurality of balancing ropes 12 are suspended will be described. The elevator system of this embodiment includes a plurality of balancing ropes 12 arranged in parallel with each other.

In the elevator system shown in FIG. 1, when there is a large unbalance between the weight of the suspended body 9 on the car 7 side and the suspended body 9 on the counterweight 8 side, in order to compensate for the unbalanced weight, the elevator system shown in FIG. As shown in FIG. 2, a plurality of balancing ropes 12 may be hung.

The elongated body guiding device 14B shown in FIGS. 10 and 11 has a configuration corresponding to a case where a plurality of balancing ropes 12 are suspended. As shown in FIG. 11A, a plurality of parallel grooves 17 are annularly provided along the circumferential direction of the first roller 14a in contact with each of the plurality of balancing ropes 12 individually on the outer circumference of the first roller 14a. ing. A plurality of parallel grooves 17 that contact each of the plurality of balancing ropes 12 individually are provided in an annular shape along the circumferential direction of the third roller 14c on the outer peripheral portion of the third roller 14c. As shown in FIG. 11B, a plurality of parallel grooves 17 are annularly provided on the outer circumference of the second roller 14b along the circumferential direction of the second roller 14b and contact each of the plurality of balancing ropes 12 individually. ing. A plurality of parallel grooves 17 that contact each of the plurality of balancing ropes 12 individually are provided in an annular shape along the circumferential direction of the fourth roller 14d on the outer peripheral portion of the fourth roller 14d.

In this embodiment, each of the plurality of balancing ropes 12 is guided through the corresponding groove 17 while individually contacting each of the first roller 14a to the fourth roller 14d. If the elevator device is equipped with such a long body guide device 14B, the hanging shape of each of the plurality of balancing ropes 12 can be approximated to an ideal shape that is less likely to sway, and even when the car 7 is running, the hanging shape can be brought close to the ideal shape. The shape can be maintained reliably. Thereby, it is possible to more reliably suppress an increase in the horizontal oscillation of the balance rope 12 when the car 7 and the balance weight 8 are moved. Further, since no load from a tension wheel or the like is applied to the balance rope 12, the burden on equipment such as the car-side rope suspension section 10, the counterweight-side rope suspension section 11, and the hoist 4 can be reduced. Thereby, it is possible to suppress the enlargement of these devices, and it is also possible to suppress the enlargement of the elevator device.

Embodiment 4.
Next, Embodiment 4 will be described with reference to FIGS. 12 to 15, but the explanation will focus on the differences from Embodiment 1 described above, and common explanations will be simplified or omitted. Further, elements common to or corresponding to those described above are given the same reference numerals.

In the present embodiment, when the emergency stop device (not shown) of the elevator device is activated and the lower curved portion 13 of the balancing rope 12 jumps up, this embodiment more reliably prevents an excessive load from being applied to the balancing rope 12. An example of a configuration for preventing this will be described.

FIG. 12 is a side view showing a state in which the emergency stop device of the elevator device is activated and the lower curved portion 13 of the balancing rope 12 jumps up in the fourth embodiment. When an abnormality such as a power outage occurs in the elevator system, sudden braking is applied by a hoisting machine brake (not shown) provided on the hoisting machine 4. Additionally, if an abnormality occurs in the elevator system, such as breakage of the suspended body 9 or abnormal speed increase due to runaway of the control panel 6, an emergency stop device (not shown) provided in the car 7 is activated and sudden braking is performed. work. When such sudden braking is applied, there is a possibility that a shift occurs in the vertical movement of the car 7 and the counterweight 8, causing the curved portion 13 to jump up as shown in FIG. 12.

FIG. 13 is a perspective view showing a long body guiding device 14C according to the fourth embodiment. As shown in FIG. 13, the elongate body guide device 14C includes a first roller 14a, a second roller 14b, a third roller 14c, and a fourth roller 14d. The arrangement of these rollers is similar to the configuration described in the first embodiment.

The elongated body guide device 14C includes a roller position fixing member 14j. Four

elongated holes

18a, 18b, 18c, and 18d are formed in the roller position fixing member 14j. Each of the

elongated hole portions

18a, 18b, 18c, and 18d has an elongated hole that forms a rectangular opening that is elongated in the vertical direction. The first roller 14a is supported so as to be slidable in the vertical direction, that is, in the X-axis direction, along the

elongated holes

18a and 18b. The third roller 14c is supported so as to be slidable in the vertical direction, that is, in the X-axis direction, along the

elongated holes

18c and 18d. The vertical dimension of each of the

elongated holes

18a, 18b, 18c, and 18d is L. Displacement of the first roller 14a and the third roller 14c in the left-right direction, that is, in the Y-axis direction, is restricted. The first roller 14a and the third roller 14c do not move in the left-right direction, that is, in the Y-axis direction.

As described above, in this embodiment, the first roller 14a is located closer to the second straight portion 16 than the second roller 14b, and is provided so as to be movable in the vertical direction. Further, the third roller 14c is located closer to the first straight portion 15 than the fourth roller 14d, and is provided so as to be movable in the vertical direction. In the illustrated example, the first roller 14a and the third roller 14c are arranged inside the curved portion 13.

The roller position fixing member 14j in this embodiment is arranged so that the positions of the rotational axes of the first roller 14a, second roller 14b, third roller 14c, and fourth roller 14d in the horizontal direction do not change. This corresponds to a roller support section that supports the first roller 14a, second roller 14b, third roller 14c, and fourth roller 14d. The roller position fixing member 14j in this embodiment is such that the positions of the rotation axes of the first roller 14a and the third roller 14c are movable in the X-axis direction, that is, in the vertical direction, and the positions of the rotation axes of the first roller 14a and the third roller 14c are The first roller 14a and the third roller 14c are supported so that the position of the rotation axis of the roller does not displace in either the Y-axis or Z-axis direction. The roller position fixing member 14j also fixes the second roller 14b and the fourth roller 14d so that the positions of the rotational axes of the second roller 14b and the fourth roller 14d are not displaced in any of the X-axis, Y-axis, and Z-axis directions. 14b and the fourth roller 14d.

Under normal conditions, when neither the hoisting machine brake nor the emergency stop device is in operation, the first roller 14a is supported by its own weight at the lower end portions of the

elongated holes

18a and 18b, as shown in FIG. Similarly, the third roller 14c is supported by its own weight at the lower end portions of 18c and 18d.

FIG. 14 is a perspective view showing a state when the winding machine brake or the emergency stop device is activated and the curved portion 13 of the balance rope 12 jumps up in the elongated body guide device 14C according to the fourth embodiment. . When the hoisting machine brake or the emergency stop device is activated and the curved portion 13 of the balance rope 12 jumps up, the balance rope 12 moves over the first roller 14a and the first roller 14a disposed inside the curved portion 13, as shown in FIG. It comes into contact with the third roller 14c. After the curved portion 13 of the balancing rope 12 contacts the first roller 14a and the third roller 14c, when the curved portion 13 is further displaced upward, the first roller 14a moves upward along the

elongated holes

18a and 18b. The third roller 14c is displaced upward along the

elongated holes

18c and 18d.

In the elevator system of this embodiment including such a long body guide device 14C, the first roller 14a and the third roller 14c are configured to be movable in the vertical direction, so that the emergency stop device etc. are activated. When the curved portion 13 of the balancing rope 12 jumps up, it is possible to more reliably prevent an excessive load from acting on the balancing rope 12 and the elongated body guide device 14C. Since an excessive load is not applied to the balance rope 12, the load on equipment such as the car side rope suspension section 10, the counterweight side rope suspension section 11, and the hoist 4 can be further reduced. Thereby, it is possible to more reliably suppress the enlargement of these devices, and it is also possible to suppress the enlargement of the elevator device more reliably.

The elevator device of this embodiment further includes a first stopper that restricts upward displacement of the first roller 14a in the vertical direction, and a second stopper that restricts upward displacement of the third roller 14c. The upper ends of the

elongated holes

18a and 18b correspond to first stoppers. The upper ends of the

elongated holes

18c and 18d correspond to second stoppers.

When the first roller 14a is displaced upward by a distance L and reaches the upper ends of the

elongated holes

18a and 18b, that is, the first stopper, the first roller 14a is no longer displaced upward. When the third roller 14c is displaced upward by a distance L and reaches the upper ends of the

elongated holes

18c and 18d, that is, the second stopper, the third roller 14c is no longer displaced upward.

In this embodiment, by providing the first stopper and the second stopper described above, when the curved part 13 of the balancing rope 12 jumps up, the curved part 13 is more reliably prevented from rising excessively. can. Therefore, it is possible to more reliably prevent the balance rope 12 from colliding with other parts.

An elastic body such as a spring or rubber may be arranged at the upper end portions of the

elongated holes

18a, 18b, 18c, and 18d. The elastic bodies disposed at the upper ends of the

elongated holes

18a and 18b can absorb the impact when the first roller 14a reaches the upper ends of the

elongated holes

18a and 18b. The elastic bodies disposed at the upper ends of the

elongated holes

18c and 18d can absorb the impact when the third roller 14c reaches the upper ends of the

elongated holes

18c and 18d.

FIG. 15 is a perspective view showing a modified elongate body guiding device 14D according to the fourth embodiment. Instead of the examples shown in FIGS. 13 and 14, an example shown in FIG. 15 may be used. In the elongate body guiding device 14C shown in FIGS. 13 and 14, in the first roller pair, the first roller 14a is arranged closer to the second straight portion 16 than the second roller 14b. On the other hand, in the elongate body guiding device 14D shown in FIG. 15, the second roller 14b is arranged closer to the second straight portion 16 than the first roller 14a. That is, the second roller 14b is on the inside, and the first roller 14a is on the outside.

In the elongate body guiding device 14C shown in FIGS. 13 and 14, in the second roller pair, the third roller 14c is arranged closer to the first straight portion 15 than the fourth roller 14d. On the other hand, in the elongate body guide device 14D shown in FIG. 15, the fourth roller 14d is arranged closer to the first straight portion 15 than the third roller 14c. That is, the fourth roller 14d is on the inside, and the third roller 14c is on the outside.

In the elongated body guide device 14D shown in FIG. 15, the second roller 14b is supported so as to be slidable in the vertical direction, that is, in the X-axis direction along the

elongated holes

18a and 18b. The fourth roller 14d is supported so as to be slidable in the vertical direction, that is, in the X-axis direction, along the

elongated holes

18c and 18d. When the second roller 14b is displaced upward by a distance L and reaches the upper ends of the

elongated holes

18a and 18b, the upward displacement of the second roller 14b causes the upper ends of the

elongated holes

18a and 18b to become stoppers. be restrained by this. As a result, the second roller 14b will no longer be displaced upward. The upper ends of the

elongated holes

18a and 18b correspond to a third stopper that restricts upward displacement of the second roller 14b in the vertical direction.

In the elongated body guide device 14D shown in FIG. 15, the fourth roller 14d is supported so as to be slidable in the vertical direction, that is, in the X-axis direction along the

elongated holes

18c and 18d. When the fourth roller 14d is displaced upward by a distance L and reaches the upper ends of the

elongated holes

18c and 18d, the upward displacement of the fourth roller 14d causes the upper ends of the

elongated holes

18c and 18d to become stoppers. be restrained by this. As a result, the fourth roller 14d will no longer be displaced upward. The upper ends of the

elongated holes

18c and 18d correspond to a fourth stopper that restricts upward displacement of the fourth roller 14d in the vertical direction.

Also in the elongate body guide device 14D shown in FIG. 15, it is preferable to arrange elastic bodies at the upper end portions of the

elongate holes

18a, 18b, 18c, and 18d. Thereby, the impact when the upward displacement of the second roller 14b and the fourth roller 14d reaches the upper ends of the

elongated holes

18a, 18b, 18c, and 18d can be absorbed.

In the elongated body guiding device 14D shown in FIG. 15, when the curved portion 13 of the counterbalance rope 12 is not raised, the outer first roller 14a is at a higher vertical position than the inner second roller 14b, and the outer first roller 14a is at a higher vertical position than the inner second roller 14b. The third roller 14c is located at a higher position than the inner fourth roller 14d.

Note that among the features of the plurality of embodiments described above, two or more features that can be combined may be combined and implemented.

The elevator device according to the present disclosure can be used in an elevator device that has an elongated body for weight compensation that is suspended between a car and a counterweight.

1. Hoistway, 2. Machine room, 3. Driving sheave, 4. Hoisting machine, 5. Deflection wheel, 6. Control panel, 7. Car, 8. Counterweight, 9. Suspension body, 10. Car side rope hanging part, 11. Counterweight. side rope Hanging part, 12 Balance rope, 13 Curved part, 14 Long body guide device, 14A Long body guide device, 14B Long body guide device, 14C Long body guide device, 14D Long body guide device, 14a First roller , 14b second roller, 14c third roller, 14d fourth roller, 14e fifth roller, 14f sixth roller, 14g seventh roller, 14h eighth roller, 14i roller position fixing member, 14j roller position fixing member, 15th 1 straight part, 16 2nd straight part, 17 groove, 18a, 18b, 18c, 18d long hole part

Claims

basket,
A counterweight and
a first straight part connected between the car and the counterweight and suspended from the car; a second straight part suspended from the balance weight; the first straight part and the second straight part; a long body having a curved part connecting the
a first roller and a second roller that guide the elongated body across the first linear portion of the elongated body;
a third roller and a fourth roller that guide the elongated body across the second straight portion of the elongated body;
Equipped with
The rotation axis of the first roller is parallel to the rotation axis of the second roller,
Regarding the vertical position, the vertical position of the rotation axis of the first roller is different from the vertical position of the rotation axis of the second roller,
The rotation axis of the third roller is parallel to the rotation axis of the fourth roller,
Regarding the vertical position, the vertical position of the rotation axis of the third roller is different from the vertical position of the rotation axis of the fourth roller.
elevator equipment.
the vertical distance from the bottom of the curved portion of the elongated body to the center of the lower one of the first roller and the second roller, and the distance of the curved portion of the elongated body; At least one of the distances in the vertical direction from the bottom to the center of the lower roller of the third roller and the fourth roller is between the first straight portion of the elongated body and the second roller. 2. The elevator system according to claim 1, wherein the distance is at least half of the horizontal distance from the straight portion.
PD is a vertical distance from the bottom of the curved part of the elongated body to the lowest position where the car or the counterweight can move;
A vertical distance from the lowest part of the curved part of the elongated body to the upper end of the lower roller of the first roller and the second roller,
When the vertical distance between the center of the first roller and the center of the second roller is r,
0<r<(PD-A)
The elevator device according to claim 1 or 2, which satisfies the following relationship.
A groove in contact with the elongated body is provided in the outer peripheral part of the first roller along the circumferential direction of the first roller,
A groove in contact with the elongated body is provided in the outer peripheral part of the second roller along the circumferential direction of the second roller,
A groove in contact with the elongated body is provided in the outer peripheral part of the third roller along the circumferential direction of the third roller,
The elevator device according to any one of claims 1 to 3, wherein a groove in contact with the elongated body is provided in an outer peripheral portion of the fourth roller along a circumferential direction of the fourth roller.
comprising a plurality of the elongated bodies arranged in parallel to each other,
A plurality of grooves are provided along the circumferential direction of the first roller in an outer peripheral portion of the first roller, the grooves contacting each of the plurality of elongated bodies individually,
A plurality of grooves are provided along the circumferential direction of the second roller in an outer peripheral portion of the second roller, the grooves contacting each of the plurality of elongated bodies individually,
A plurality of grooves are provided along the circumferential direction of the third roller in the outer circumference of the third roller, the grooves contacting each of the plurality of elongated bodies individually,
Any one of claims 1 to 3, wherein a plurality of grooves are provided in an outer peripheral portion of the fourth roller along a circumferential direction of the fourth roller, the grooves individually contacting each of the plurality of elongated bodies. The elevator device according to item 1.
a fifth roller and a sixth roller that guide the elongated body across the first linear portion of the elongated body;
a seventh roller and an eighth roller that guide the elongated body across the second straight portion of the elongated body;
Furthermore,
The rotation axis of the fifth roller is perpendicular to the rotation axis of the first roller,
The rotation axis of the fifth roller is parallel to the rotation axis of the sixth roller,
Regarding the vertical position, the vertical position of the rotation axis of the fifth roller is different from the vertical position of the rotation axis of the sixth roller,
The rotation axis of the seventh roller is perpendicular to the rotation axis of the third roller,
The rotation axis of the seventh roller is parallel to the rotation axis of the eighth roller,
The elevator device according to any one of claims 1 to 5, wherein the vertical position of the rotation axis of the seventh roller is different from the vertical position of the rotation axis of the eighth roller.
The first roller is located closer to the second straight portion than the second roller, and is provided so as to be movable in the vertical direction,
The third roller is located closer to the first linear portion than the fourth roller, and is provided so as to be movable in the vertical direction. elevator equipment.
a first stopper that restricts vertical upward displacement of the first roller;
a second stopper that suppresses upward displacement of the third roller in the vertical direction;
The elevator system according to claim 7, further comprising:
the elongated body does not suspend the tension wheel;
The first roller, the second roller, and the fourth roller are arranged so that the positions of the rotational axes of the first roller, the second roller, the third roller, and the fourth roller do not change in the horizontal direction. The elevator device according to any one of claims 1 to 8, further comprising a roller support section that supports three rollers and the fourth roller.