JP2017065923A - Torsion elimination device of elevator rope, attachment device of elevator rope, elevator device and attachment method of elevator rope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a torsion elimination device of an elevator role which can surely eliminate torsion generated at the rope.SOLUTION: This torsion elimination device of an elevator rope comprises: rope tension detection means which detects rope tension generated at the rope which is anchored by a rope metal fitting 2 at one end, and suspended in a hoistway as the deformation of an elastic body; and rope rotation means which rotates the rope around a center shaft to a direction for eliminating the torsion which is generated when the tension is applied to the rope according to the rope tension which is detected by the rope tension detection means. The rope tension detection means is constituted of a coil spring 13 or the like. The rope rotation means has a rotating body 11 and rotation conversion means for rotating the rotating body 11 with an axial line of the rotating body 11 as a center. The rotation conversion means has a spiral groove 19 formed at the rotating body 11, and a protrusion 12 engaged with the groove 19.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an apparatus for eliminating torsion occurring in an elevator rope.

In the installation work of the elevator, in the work of attaching the rope, the rope is lowered to the hoistway while the rope is sequentially drawn out from the rope drum.
At this time, in a general elevator rope, when a tension is applied to the rope, the rope is untwisted and thus the rope is twisted. Therefore, as the rope 1 descends to the hoistway when the rope is attached, tension is generated by the weight of the rope, and the rope itself is twisted.
However, the end of the rope cannot be rotated because it is fixed by the rope stopper. Furthermore, the rope end connected to the other hoisting machine also has a rope drum, so it cannot rotate.
Therefore, as the rope is lowered to the hoistway, the rope accumulates without being twisted. If this twist is accumulated, problems such as the rope violating during the installation work of the rope and the life of the rope and various pulleys being adversely affected occur.

  In order to solve this problem, conventionally, a rotatable joint is added to the rope stopper to eliminate torsion generated in the rope. (For example, Patent Document 1)

Japanese Patent Laid-Open No. 10-203751 (paragraph 11 on page 4, paragraph 29 on page 6, FIG. 2)

In the conventional configuration, when the building where the elevator is installed is actually high and the length of the rope to be lowered to the hoistway becomes long, a large frictional force is generated in the joint, which inhibits the rotation of the rope.
As a result, the twist that occurs in the rope cannot be sufficiently eliminated simply by adding a rotatable joint, and it is necessary to turn the rope with human hands.
In addition, when the rope is turned by a human hand, there remains a problem in that the adjustment varies depending on the skill of the operator.
Furthermore, when the rope is turned by a human hand, there is a problem that the twisting of the rope can be eliminated only at a limited time such as when installing the elevator or performing maintenance.

  An object of the present invention is to solve such a problem, which is not affected by disturbances such as friction, and reliably eliminates the torsion that occurs when attaching a rope regardless of the skill of the operator. The purpose of the present invention is to obtain a twist-removing device for an elevator rope.

The elevator rope torsion eliminating device according to the present invention is a rope for detecting, as an elastic body deformation, a rope tension generated in the rope when the end is fastened by a rope stopper and the rope is suspended in a hoistway. Tension detecting means;
Rope rotation means for rotating the rope around a central axis in a direction to eliminate torsion that occurs when tension is applied to the rope according to the value of the rope tension detected by the rope tension detection means; ing.

  Also, an elevator rope attachment device provided with an elevator rope torsion elimination device according to the present invention is a device for eliminating twisting of an elevator rope, using a jack to lift the base of the rope tension detection means, and the rope tension detection means. Installed on the floor of the machine room with the rope tension applied only to the elastic body.

According to the elevator rope torsion eliminating device according to the present invention, the rope is actively rotated in a direction to eliminate the torsion of the rope in accordance with the rope tension generated during the rope installation or during the normal operation. Therefore, it is possible to reliably eliminate the torsion of the rope at all times regardless of disturbance such as friction and the skill of the operator.
Further, according to the elevator rope attachment device provided with the elevator rope twist eliminating device according to the present invention, the rope tension is not affected by the fixing spring of the rope stopper, but is detected by the rope tension detecting means as it is. Therefore, the rope rotating means can rotate the rope around the central axis by the amount of rotation necessary to eliminate the twist.

It is a front view which shows the outline in the rope installation operation | work in a general elevator. It is the front view which expanded the rope stopper metal fitting of FIG. It is sectional drawing which shows the twist elimination apparatus of the elevator rope of Embodiment 1 of this invention. It is a perspective view which shows the rotary body of FIG. It is a fragmentary sectional view of the terminal rod and rotary body of FIG. It is a front view which shows the twist elimination apparatus of the elevator rope of Embodiment 2 of this invention. It is a front sectional view showing a twist elimination device for an elevator rope according to Embodiment 3 of the present invention. It is a front sectional view showing a twist elimination device for an elevator rope according to Embodiment 4 of the present invention. It is a front sectional view which shows the twist elimination apparatus of the elevator rope of Embodiment 5 of this invention. It is front sectional drawing which shows the modification of the twist elimination apparatus of the elevator rope of Embodiment 5 of this invention. It is a front sectional view showing a twist elimination apparatus for an elevator rope according to Embodiment 6 of the present invention. It is front sectional drawing which shows the modification of the twist elimination apparatus of the elevator rope of Embodiment 6 of this invention. It is a partial front view of a terminal rod and a rotary body. It is arrow sectional drawing along the XIV-XIV line | wire of FIG. It is sectional drawing which shows the installation procedure of the twist elimination apparatus of the elevator rope of Embodiment 1 of this invention. It is sectional drawing which shows the installation procedure of the twist elimination apparatus of the elevator rope of Embodiment 1 of this invention. It is a front view which shows the twist elimination apparatus of the elevator rope of Embodiment 7 of this invention. It is a front view which shows the elevator provided with the twist elimination apparatus of the elevator rope of Embodiment 7 of this invention. It is sectional drawing which shows the twist elimination apparatus of the elevator rope of Embodiment 8 of this invention. It is a front view which shows the twist elimination apparatus of the elevator rope of Embodiment 9 of this invention. It is a front view which shows the twist cancellation | elimination apparatus of the elevator rope of Embodiment 10 of this invention. It is a front view which shows the twist cancellation | elimination apparatus of the elevator rope of Embodiment 10 of this invention.

  Hereinafter, an elevator rope torsion eliminating apparatus according to each embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or equivalent members and parts will be described with the same reference numerals.

Embodiment 1.
FIG. 1 is a schematic front view showing an elevator during a rope installation operation in a general elevator.
This elevator is provided with a machine room above the hoistway 9. A rope drum 5 and a hoisting machine 6 are installed on the machine room floor 3 of the machine room.
A car 7 that is guided up and down by an elevator rail 8 extending in the vertical direction is placed in the lower part of the machine room.

The rope installation work in this elevator is performed in the following procedure.
First, one end of the rope 1 drawn out from the rope drum 5 in the direction of arrow A is passed through the hoisting machine 6 and then hung down to the hoistway 9 side so as to be U-shaped as shown by arrow B.
In this rope 1, the strands are twisted together, and when the rope 1 is tensioned, the rope 1 tends to be untwisted, so that the rope 1 is twisted.
Therefore, as the rope 1 descends to the hoistway 9 when the rope is installed, the length of the rope 1 suspended between the rope stopper 2 and the hoisting machine 6 increases, and the tension of the rope 1 due to its own weight is increased. The twist increases in the rope 1 itself.

As shown in FIG. 2, the rope stopper 2 fixed to the machine room floor 3 fixes the end of the rope 1 to the terminal rod 2b via the connecting portion 2a. Then, the terminal rod 2b is protruded upward from the hole formed in the machine room floor 3, and the washer 2e, the fixing portion spring 2c, and the nut 2d are attached in this order. At this time, since the washer 2e and the nut 2d are hollow at the center, the terminal rod 2b passes through the hollow. The terminal rod 2b is threaded at the end opposite to the connecting portion 2a of the rope 1, and by screwing the nut 2d into this end, the fixed portion spring 2c is connected to the washer 2e and the nut 2d. It is pinched and fixed.
Thus, the rope tension normally applied to the rope 1 is transmitted from the end rod 2b to the fixed portion spring 2c via the nut 2d. The fixed part spring 2c is held down by the nut 2d and the washer 2e placed on the machine room floor 3, and the fixed part spring 2c is elastically deformed according to the rope tension.

Thereafter, the rope 1 is lowered from the rope drum 5 to the hoistway 9 while the rope 1 is sequentially fed out, and the rope 1 is hung on the car 7 assembled in advance below the hoistway 9.
At this time, in the general elevator configuration shown in FIG. 1, one end of the rope 1 is fixed by the rope stopper 2, and the rope end connected to the hoisting machine 6 on the opposite side also has the rope drum 5. It cannot be rotated. Therefore, as the rope 1 is lowered to the hoistway 9, the rope tension increases due to its own weight, and the rope 1 accumulates torsion.

FIG. 3 is a cross-sectional view showing the elevator rope torsion eliminating apparatus according to Embodiment 1 of the present invention.
In the elevator rope torsion eliminating device of this embodiment, the coil spring 13 is elastically deformed by the own weight of the rope 1 lowered to the hoistway 9, and the rope 1 is actively eliminated torsion in proportion to the amount of deformation. By having a mechanism that rotates in the direction of rotation, the twist generated in the rope 1 is eliminated.
This elevator rope attachment device includes a rope tension detecting means for detecting, as a deformation of an elastic body, a rope tension generated when an end portion is fastened by a rope stopper 2 and the rope 1 is suspended in the hoistway 9. According to the value of the rope tension detected by the rope tension detecting means, the rope rotation that rotates the rope 1 around the central axis by a necessary amount of rotation in the direction to eliminate the twist generated when the rope 1 is tensioned. Means.
The rope tension detecting means is fitted in the fitting groove 18 at the upper end portion of the rotating body 11 whose lower end portion is fixed to the base rod 17 having the through hole 17a and the end rod 2b of the rope stopper 2 and is penetrated through the through hole 17a. And a coil spring 13 that is provided between the stopper 14 and the base 17 and is an elastic body that detects a rope tension generated in the rope 1.

The rope rotating means includes a rotating body 11 integrally connected to the end of the terminal rod 2b on the same axis as the terminal rod 2b, and moves the rotating body 11 in the vertical direction by rope tension. Rotation conversion means for rotating to the center, and a bearing 15 provided between the stopper 14 and the coil spring 13 for smoothly rotating the rotating body 11 and the stopper 14 relative to the coil spring 13 are provided.
As shown in FIG. 4, the rotation converting means includes a groove 19 formed in a spiral shape on the peripheral surface of the rotating body 11, a protrusion 12 having a proximal end fixed to the through hole 17 a and a distal end engaged with the groove 19. ,have.

FIG. 5 is a partial cross-sectional view of the terminal rod 2 b and the rotating body 11.
The end of the terminal rod 2b is threaded. The lower end of the rotating body 11 is screwed into the threaded portion, and the nut 2d is tightened from the end of the terminal rod 2b. Are connected together.

In the elevator rope torsion eliminating device of this embodiment, when the rope 1 is fed from the rope drum 5 to the hoistway 9 while being fixed to the end rod 2b of the rope stopper 2 on the rotating body 11, the weight of the rope 1 increases. As the rope tension increases.
When the coil spring 13 is contracted by elastic deformation according to the rope tension, the rotating body 11 integrated with the stopper 14 moves downward.
As the rotator 11 moves downward, the rotator 11 rotates in a direction to eliminate the twist of the rope 1 by the groove 19 engaged with the protrusion 12, and the terminal rod 2 b integrated with the rotator 11 also moves. By rotating, the twist of the rope 1 is eliminated.

  Under the conditions normally used in an elevator, the rope tension T [N] and the rotation amount φ [degree] necessary for eliminating torsion are in a substantially linear relationship, and therefore, the following equation is established.

              φ = αT (1)

  Here, α [degree / N] is the amount of rotation per 1N of rope tension necessary for eliminating torsion. In addition, since the value of (alpha) changes with kinds, such as a structure of the rope 1, and how to twist, it can know by measuring beforehand for every kind of rope 1. FIG. Further, the following equation is established from the rigidity K [N / mm] of the coil spring 13 and the displacement x [mm] in the vertical direction.

              T = Kx (2)

  When the above two formulas are put together, the following formula (3) is obtained.

φ = αKx
φ / x = αK (3)

Since the displacement x is the value of the vertical fluctuation of the rotating body 11 as it is, the spiral groove 19 may be formed in the rotating body 11 so as to satisfy the above expression (3).
That is, the groove 19 is formed so that the rotating body 11 rotates αK [degree] with respect to the displacement 1 mm in the vertical direction of the coil spring 13.
In addition, if the stopper 14 and the coil spring 13 are brought into direct contact, the rotation of the rotating body 11 to which the stopper 14 is fixed may be hindered by frictional force when the weight of the rope increases. Therefore, the rotating body 11 rotates smoothly by arranging the bearing 15 between the stopper 14 and the coil spring 13 here.

  In FIG. 3, the coil spring 13 and the rotating body 11 are arranged concentrically, but the same effect can be obtained even if a plurality of coil springs 13 are arranged on the outer periphery of the rotating body 11.

In the rope attachment device provided with the elevator rope twisting elimination device having the above-described configuration, the coil spring 13 of the rope tension detecting means expands and contracts in the vertical direction in accordance with the rope tension, but a general elevator as shown in FIG. When this elevator rope attachment device is placed on the machine room floor 3 with the above configuration, rope tension is also applied to the fixed portion spring 2c, and the coil spring 13 cannot be deformed in the vertical direction as expected.
Therefore, before unwinding the rope 1 from the rope drum 5, the torsion eliminating device is installed on the machine room floor 3 with the base 17 being lifted by the jack 16 in advance as shown in FIG. Thereafter, as shown in FIG. 16, with the terminal rod 2b and the rotating body 11 connected, the jack 16 is extended and the base 17 is lifted so that the rope tension is applied only to the coil spring 13 as shown in FIG. To. Thereby, it becomes possible to reliably eliminate the twist of the rope 1 as in the formula (3) that has been confirmed in advance with respect to the generated rope tension.

Thus, by adding the jack 16 and the elevator rope attachment device to the rope stopper 2 at the time of attaching the rope 1, it is possible to reliably eliminate torsion that occurs at the time of attaching the rope 1.
After that, when the attachment of the rope 1 is completed, the added jack 16 and the elevator rope attachment device are no longer necessary. Therefore, all the parts except the original rope stopper 2 are removed in the reverse order, and shown in FIG. Thus, the elevator is operated with only the rope stopper 2 installed.

Embodiment 2. FIG.
FIG. 6 is a front view showing an elevator rope twisting eliminating apparatus according to Embodiment 2 of the present invention, and the rope tension is detected by a coil spring 13 as a spring contraction, similar to that of Embodiment 1. FIG. .
The rope tension detecting means of the elevator rope torsion eliminating device according to the second embodiment includes a base 17 and a stopper 14 fixed to an intermediate portion of a rotating body 33 provided extending in the vertical direction to the base 17. And a coil spring 13 provided between the stopper 14 and the base 17.
Further, the rope rotating means of the elevator rope torsion eliminating device includes a rotating body 33 integrally connected to the end of the terminal rod 2b on the same axis as the terminal rod 2b, and the rotating body 33 in the vertical direction by rope tension. A rotation converting means for moving and rotating about the axis; and a bearing 15 provided between the stopper 14 and the coil spring 13 for smoothly rotating the rotating body 33 and the stopper 14 with respect to the coil spring 13. Yes.
The rotation converting means is fixed to the base 17 in mesh with the rack 34 attached to the peripheral surface of the rotating body 33, the wide gear 36 fixed to the tip of the rotating body 33, and the rack 34. A gear mechanism 35.
The gear mechanism 35 includes a spur gear 35a meshed with the rack 34, a face gear 35b whose rotation is synchronized with the spur gear 35a, and a pair of gears 35c that rotate in synchronization with the face gear 35b. .
In the gear mechanism 35, the vertical displacement of the rotating body 33 is converted into rotational motion by the spur gear 35a, the central axis of the rotational motion is converted by the face gear 35b whose rotation is synchronized with the spur gear 35a, and the rotation is transmitted to the gear 35c. Is done. Further, this rotation is transmitted to the wide gear 36.
Here, when the rack 34 moves downward, the wide gear 36 rotates in a direction to cancel the twist of the rope 1.

Therefore, in order to eliminate the influence of the fixing portion spring 2c, the rope stopper 2 is attached to the rotating body 33 using the nut 2d in a state where the base 17 is previously lifted by the jack 16. When the coil spring 13 contracts in accordance with the tension of the rope 1, the rotating body 33 also moves downward.
Here, in the second embodiment, the vertical movement of the rotating body 33 is converted to the rotation in the rope axis direction via the rack 34 and the gear mechanism 35, and the wide gear 36 fixed to the rotating body 33 is rotated. Let As a result, the terminal rod 2b also rotates in the direction to eliminate the twisting in accordance with the rotation of the rotating body 33, and the twisting of the rope 1 is eliminated.

In order to eliminate the twist correctly, the rack 34, the gear mechanism 35, and the wide gear 36 need to satisfy the above expression (3).
That is, if the rotating body 33 moves up and down by 1 mm, the number of teeth of the gears 35a, 35b, and 35c of the rack 34 and the gear mechanism 35 is determined so that the rotating body 33 rotates by αK [degrees].
At this time, the gear 35 c is integral with the base 17 and the position is not changed, but the rotating body 33 moves in the vertical direction in accordance with the contraction of the coil spring 13. For this reason, the wide gear 36 attached to the rotating body 33 has a width in the height direction so that the gears always mesh with each other.
The maximum amount by which the rotating body 33 moves in the vertical direction can be calculated in advance from the maximum rope tension and the rigidity of the coil spring 13.
Further, the configuration of the rack 34 and the gear mechanism 35 for converting the vertical displacement of the rotating body 33 into the rotation around the axis of the rope 1 is not limited to the configuration specifically shown in FIG. Even if the number is changed, the same effect can be obtained.

Embodiment 3 FIG.
FIG. 7 is a front sectional view showing an elevator rope twisting eliminating apparatus according to Embodiment 3 of the present invention.
In the first embodiment and the second embodiment, the coil spring 13 is arranged coaxially with the fixed portion spring 2c of the rope stopper 2 so that the coil spring 13 is deformed in the vertical direction according to the rope tension. did.
On the other hand, in the elevator rope twisting eliminating apparatus of this embodiment, instead of the coil spring 13 of the first embodiment, the wedges 22 provided on both sides of the rotating body 11 and the wedges 22 are pressed from the back. And a horizontal spring 21 which is a compression spring.
In this embodiment, the rope tension detecting means has a base 17, a stopper 14, a wedge 22 that converts the movement of the rotating body 11 in the axial direction into a movement in the horizontal direction, and a horizontal spring 21. .
The rope rotating means has a rotating body 11 similar to that of the first embodiment and a rotation converting means.
Further, the rotation converting means is the same as that of the first embodiment, the groove 19 formed in a spiral shape on the peripheral surface of the rotating body 11, the protrusion 12 provided in the through hole 17a of the base 17, have.

  In the elevator rope twisting elimination apparatus according to the first embodiment, when the rope tension increases, the wedge 22 bites down while compressing the horizontal spring 21. The stopper 14 is fixed to a portion of the rotating body 11 on the upper side of the wedge 22, and the rotating body 11 moves downward as the rope 11 moves according to the rope tension. Since the rotator 11 has a spiral groove 19 shown in FIG. 4, when the rotator 11 is lowered, the rotator 11 itself rotates in a direction to cancel the twist of the rope 1, and the twist of the rope 1 is It will be resolved.

  The angle of the wedge 22 is θ [degree], the rigidity of the horizontal spring 21 is K ′ [N / mm], and the displacement of the horizontal spring 21 is y [mm]. The following formula is established for the force f [N] generated by the horizontal spring 21 from the rigidity K ′ and the displacement y.

              f = K′y (4)

  If the vertical displacement of the rotating body 11 is x [mm], the following equation is established from the geometric relationship of the wedge.

              tanθ = y / x (5)

  Assuming that the friction of the wedge 22 is very small, the following equation is established from the relationship of the force perpendicular to the wedge surface.

              Tsinθ = fcosθ (6)

  As mentioned above, when the formula (1) and the formulas (4) to (6) are combined, the formula (7) is obtained.

φsinθ / α = K'xtanθcosθ
φ = αK'x (7)

  From the above, it is possible to eliminate the twist of the rope 1 by providing the spiral groove 19 so as to rotate αK ′ degrees whenever the grooved rotating body 11 moves up and down 1 mm.

Embodiment 4 FIG.
FIG. 8 is a front sectional view showing an elevator rope twisting eliminating apparatus according to Embodiment 4 of the present invention.
In this embodiment, the rope tension detection means has a base 17, a stopper 14, a wedge 22, and a horizontal spring 21 which is a compression spring, as in the third embodiment.
The rope rotating means is a rotation converting means for rotating the rotating body 33 coaxially connected to the end of the terminal rod 2b on the same axis as the terminal rod 2b and the rotating body 33 moving in the vertical direction by the rope tension around the axis. And a bearing 15 that is provided between the stopper 14 and the wedge 22 and smoothly rotates the rotating body 33 and the stopper 14 relative to the wedge 22.
The rotation converting means includes a rack 34 attached to the upper end of the wedge 22, a wide gear 36 fixed to the tip of the rotating body 33, and a gear mechanism 35 that meshes with the rack 34 and is fixed to the base 17. And.
The gear mechanism 35 includes a spur gear 35a meshed with the rack 34, a face gear 35b whose rotation is synchronized with the spur gear 35a, and a pair of gears 35c that rotate in synchronization with the face gear 35b. .
In the gear mechanism 35, the horizontal movement of the wedge 22 generated by the deformation of the horizontal spring 21 is converted into rotational movement by the spur gear 35a, and the central axis of the rotational movement is converted by the face gear 35b whose rotation is synchronized with the spur gear 35a. Thus, the rotation is transmitted to the gear 35c. Further, this rotation is transmitted to the wide gear 36.
Here, when the rotary body 33 is lowered and the wedge 22 is pushed and widened, the wide gear 36 rotates in a direction to cancel the twist of the rope 1.

The relationship between the displacement y [mm] of the horizontal spring 21 and the generated force f [N] is from the above equation (4), and the relationship between the rope tension T [N] and the force force f [N] generated by the horizontal spring 21 is as described above. It can be obtained from equation (6).
By summing up the above formula (1), formula (A) is obtained.

φsinθ / α ＝ K'ycosθ
φ = αK'y / tanθ (A)

  Therefore, every time the rotating body 33 is lowered and the wedge 22 is pushed and expanded in the horizontal direction by 1 mm, the teeth of the gears 35a, 35b, and 35c of the rack 34 and the gear mechanism 35 so that the αK ′ / tan θ degree rotating body 33 rotates. The twist of the rope 1 can be eliminated by determining the number.

Embodiment 5. FIG.
In the first to fourth embodiments, the rotation according to the rope tension is given to the rope 1 by a mechanical configuration.
On the other hand, in this embodiment, the tension of the rope 1 is measured by a sensor or the like, and once converted into an electrical signal, the rope is rotated by the motor 52 in accordance with the signal.
FIG. 9 is a front sectional view showing an elevator rope twisting eliminating apparatus according to the fifth embodiment.
The rope tension detecting means of the elevator rope torsion eliminating device includes a base 17 and a stopper 14 that passes through the base 17 and is fixed to the end of a rotating body 54 that is attached to the end rod 2b of the rope stopper 2. And a hollow load cell 41 which is a load sensor provided between the stopper 14 and the base 17 and a rotating body 54 and the stopper 14 which are provided between the stopper 14 and the load cell 41 and rotate smoothly with respect to the load cell 41. And a bearing 15 to be moved.
It should be noted that the bearing 15 prevents damage from being scratched or worn when the stopper 14 and the load cell 41 are in direct contact with each other.
The rope rotating means includes a rotating body 54 integrally connected to the end of the end rod 2b of the rope stopper 2 on the same axis as the end rod 2b, and the rotating body 54 according to the value of the load cell 41. And a rotation body side gear 53b fixed to the end of the rotation body 54.
The rotation changing means includes a controller 51 that determines the amount of rotation of the rotating body 54 based on a signal from the load cell 41, a motor 52 that is driven by a signal from the controller 51, and a rotating body side gear 53b that is connected to the motor 52. And an intermeshing motor side gear 53a.

The rope tension is transmitted from the terminal rod 2 b to the rotating body 54, and the load cell 41 is compressed by the stopper 14 fixed to the rotating body 54.
The value of the rope tension measured by the load cell 41 is input to the controller 51, and the rope 1 is rotated in a direction to eliminate the twist of the rope 1 by the motor 52 so that the rotation amount according to the tension is obtained. Since the relationship between the rope tension T and the rotation amount φ [degree] necessary to eliminate torsion is known as shown in the equation (1), the number of teeth of the rotating body side gear 53b with respect to the motor side gear 53a is If it is m times, the rotation amount φ ′ [degree] of the motor 52 necessary for eliminating the twist is obtained by the following equation.

φ = αT = N '/ m
φ '= mαT (8)

That is, the output of the controller 51 is determined so that the motor 52 rotates by a value obtained by multiplying the tension T [N] measured by the load cell 41 by mα.
At this time, before unwinding the rope from the rope drum 5, the base 17 is lifted in advance by the jack 16, so that it is not affected by the fixed portion spring 2c that is deformed in the vertical direction by the weight of the rope, and the motor side gear 53a is stably The rotor side gear 53b meshes.
As a result, the rotating body 54 is rotated via the motor-side gear 53a, and the terminal rod 2b connected integrally with the rotating body 54 is rotated, and the twist of the rope 1 is eliminated.

In FIG. 9, one hollow load cell 41 is arranged between the stopper 14 and the base 17. However, as shown in FIG. 10, it is also possible to arrange the load cell 41 between each jack 16 and the machine room floor 3. Similar effects can be obtained.
Further, the same applies when a load cell is disposed between the base 17 and the jack 16 instead of the machine room floor 3.

Embodiment 6 FIG.
FIG. 11 is a front view showing an elevator rope twisting eliminating apparatus according to Embodiment 5 of the present invention.
The elevator rope twisting eliminating apparatus according to this embodiment includes a strain gauge 42 that is a load tension detecting means, and a rope rotating means, which are attached to the end rod 2b of the rope stopper 2.
The rope rotating means includes a rod side gear 56 fixed to the end of the end rod 2b of the rope stopper 2 and the end rod 2b around the axis of the end rod 2b according to the value of the strain gauge 42. Rotation converting means for rotating.
The rotation converting means includes a controller 51 to which a measurement signal of the strain gauge 42 is sent, a motor 52 driven by a signal from the controller 51, and a motor side wide gear connected to the motor 52 and meshed with a rod side gear 56. 55.
In the elevator rope attachment device of this embodiment, the rope 1 is rotated in a direction to cancel the twist of the rope 1 by the motor 52 while the rope tension is applied to the fixed portion spring 2c.

  In this embodiment, the strain gauge 42 is attached to the end rod 2b of the rope stopper 2 to which the rope tension is constantly applied, and a signal corresponding to the tension can be obtained from the strain gauge 42. At this time, if the cross-sectional area of the rope stopper 2 to which the strain gauge 42 is attached is A [mm2], the relationship between the rope tension T [N] and the strain ε obtained from the signal is Young's modulus E [N / mm2 ], The following equation is established.

Eε = T / A
T = AEε (9)

  Further, since the relationship between the rope tension T and the rotation amount φ necessary for eliminating torsion is known as shown in the equation (1), the number of teeth of the rod-side gear 56 with respect to the motor-side wide gear 55 is m. If it is doubled, the rotation amount φ ″ [degree] of the motor 52 necessary for eliminating the torsion can be obtained by the following equation.

φ = αT = αAEε = φ "/ m
φ ”= mαAEε (10)

  That is, the controller 51 outputs a signal for rotating the motor 52 by a value obtained by multiplying the strain ε obtained from the strain gauge 42 by mαAE.

In this embodiment, the fixed portion spring 2c gradually contracts due to the weight of the rope 1, so that the height of the rod-side gear 56 from the machine room floor 3 also changes. Therefore, the motor-side wide gear 55 attached to the motor 52 has a width in the height direction so that the engagement can be maintained even if the height of the rod-side gear 56 changes.
This width can be calculated in advance from the rigidity of the fixed portion spring 2c, the length of the rope 1 to be lowered to the hoistway 9, and the density of the rope 1, and therefore, a value larger than the previous calculation result is secured. To do.

Instead of the strain gauge 42, a tension meter 43 as a rope tension detecting means may be attached to the rope 1 as shown in FIG. The tensiometer 43 includes a pair of small-diameter rollers 43a arranged in the vertical direction, and a large-diameter roller 43b movable between the small-diameter rollers 43a and the small-diameter rollers 43a. The rope 1 passes between the pair of both small-diameter rollers 43a and the large-diameter roller 43b so as to be biased toward the both small-diameter rollers 43a, and the rope 1 is in contact with the large-diameter roller 43b by applying rope tension to the rope 1. The large-diameter roller 43b is also moved in accordance with the linear movement of the portion, and the rope tension applied to the rope 1 can be known from this movement amount.
In this embodiment, the rope rotating means is the same as that of FIG. 11, the rod side gear 56 fixed to the end of the terminal rod 2 b of the rope stopper 2 and the value of the tension meter 43. And a rotation converting means for rotating the terminal rod 2b around the axis of the terminal rod 2b.
The rotation converting means includes a controller 51 to which a measurement signal from the tension meter 43 is sent, a motor 52 driven by a signal from the controller 51, and a motor side wide gear 55 connected to the motor 52 and meshed with a rod side gear 56. And.

  Further, instead of the tension meter 43 in FIG. 12, a load cell as a load sensor may be provided between the washer 2 e and the machine room floor 3.

Embodiment 7 FIG.
In Embodiments 1 to 6 that have been described so far, the focus has been mainly on the rope tension at the time of attaching the rope, but even during normal operation, the rope tension can be changed by changing the position of the cage or the secular change of the rope itself. Will fluctuate.
Therefore, by using the fixing portion spring 2c attached to the rope stopper 2 as an elastic body as a rope tension detecting means, it is possible to eliminate the torsion of the rope not only during the rope installation work but also during the normal operation of the elevator. Become.

FIG. 17 is a front view showing a rope twist eliminating apparatus according to Embodiment 7 of the present invention. FIG. 18 is a front view showing an elevator equipped with this rope twist eliminating device.
FIG. 17 is obtained by removing the jack 16 from the configuration shown in FIG. 6 and directly installing the machine 17 above the base 17 on the machine room floor 3. With the configuration shown in FIG. 17, the coil spring 13, which is an elastic body, is deformed by the rope tension not only when the rope is attached but also during normal operation. According to the deformation of the coil spring 13, the rotating body 33 connected to the rope 1 via the rack 34 and the gear mechanism 35, which are rotation conversion means, rotates, and the twist of the rope 1 is eliminated.
Then, as shown in FIG. 18, by installing the rope twist eliminating device at both ends of the rope, it becomes possible to always eliminate the twist of the rope.

Embodiment 8 FIG.
17 and 18 show a configuration in which the rope twist elimination apparatus described in the second embodiment is modified, but the same effects can be obtained with the configurations described in the other embodiments. An example is shown in FIG. The configuration shown in FIG. 19 is a mode in which the jack 16 is eliminated from the configuration shown in FIG. 3 as the rope twist eliminating device described in the first embodiment.

Embodiment 9 FIG.
FIG. 20 is a front view showing a rope twist eliminating apparatus according to Embodiment 9 of the present invention.
In the present embodiment, the deformation of the elastic body is measured by a sensor or the like, and once converted into an electrical signal, the rope 1 is rotated by the motor 52 in accordance with the signal.
The rope tension detecting means of the elevator rope torsion eliminating device includes a fixed portion spring 2c, which is an elastic body, and a displacement sensor 57 that measures the deformation of the elastic body.
The rope rotating means includes a rod side gear 56 fixed to the end of the end rod 2b of the rope stopper 2 and the end rod 2b around the axis of the end rod 2b according to the value of the displacement sensor 57. Rotation converting means for rotating.
The rotation converting means includes a controller 51 to which a measurement signal of the displacement sensor 57 is sent, a motor 52 driven by a signal from the controller 51, and a motor side wide gear connected to the motor 52 and meshed with a rod side gear 56. 55.

In this embodiment, a signal corresponding to the rope tension can always be obtained by measuring the deformation of the fixed portion spring 2c to which the rope tension is always applied by the displacement sensor 57.
At this time, the following equation is established from the rigidity K ″ [N / mm] of the fixed portion spring 2c and the amount of deformation x [mm] in the vertical direction.
T = K ″ x (11)
Since the relationship between the rope tension T and the amount of rotation φ necessary to eliminate torsion is known as shown in the equation (1), the number of teeth of the rod side gear 56 is m times that of the motor side wide gear 55. Then, the rotation amount φ ′ ″ [degree] of the motor 52 necessary for eliminating torsion can be obtained as follows.
φ = αT = αK ″ x = φ ′ ″ / m
φ '''=mαK''x (12)
That is, the controller 51 outputs a signal for rotating the motor 52 by a value obtained by multiplying the deformation amount x obtained from the displacement sensor 57 by mαK ″.
In this embodiment, since the fixed portion spring 2c is elastically deformed by the own weight of the rope 1, the height of the rod-side gear 56 from the machine room floor 3 also changes. Therefore, the motor-side wide gear 55 attached to the motor 52 has a width in the height direction so that the engagement can be maintained even if the height of the rod-side gear 56 changes.

Embodiment 10 FIG.
In the ninth embodiment, the rope is rotated via the motor-side wide gear 55 and the rod-side gear 56, but the same effect can be obtained by rotating the terminal rod 2b directly by the motor 52 as shown in FIG. Is obtained. In this case, m times the number of teeth in equation (12) is not necessary.
In addition, the fixing portion spring 2c is elastically deformed, whereas the mounting position of the motor 52 is fixed. Therefore, by connecting the motor 52 and the terminal rod 2b via the joint 58, the motor 52 is always engaged with the motor 52 even if the fixed spring 2c is deformed in the vertical direction.
In the ninth and tenth embodiments, the displacement sensor 57 is used as a method for measuring the deformation amount of the fixed portion spring 2c, which is an elastic body, but other measurement methods may be used. FIG. 22 shows an example. That is, FIG. 22 exemplifies a configuration in which the strain gauge 42 is attached to the fixed portion spring 2c with respect to the tenth embodiment, but although not illustrated, the strain gauge is similarly applied to the ninth embodiment. It is possible to carry out with modification so as to stick.

Note that the invention of the present application includes a combination of part or all of the configurations of any one or more of the embodiments described above with the other embodiments. Moreover, although each said embodiment demonstrated the attachment apparatus of the rope in the elevator with a machine room, this invention is applicable also to an elevator without a machine room.
The rotating body 33 according to the second embodiment, the rotating body 11 according to the third embodiment, and the rotating body 54 according to the fourth embodiment are integrally connected to the terminal rod 2b with the same structure as the rotating body 11 according to the first embodiment. However, as shown in FIGS. 13 and 14, the terminal rod 2 b and the rotating bodies 11, 33, and 54 of each embodiment may be integrally connected.
In other words, in this example, the terminal rod 2b and each of the rotating bodies 11, 33, 54 are perforated, and the pin 61 is inserted so that the terminal rod 2b and each of the rotating bodies 11, 33 are inserted as in the case of FIG. , 54 can be connected together.
Moreover, about the fixing method of the terminal rod 2b and each rotary body 11,33,54, other fixing methods, such as a universal joint, may be used.

1 rope, 2 rope stopper, 2a connection part, 2b terminal rod, 2c fixed part spring, 2d nut, 2e washer, 3 machine room floor, 5 rope drum, 6 hoisting machine,
7 car, 8 elevator rail, 9 hoistway, 11 rotating body, 12 protrusion, 13 coil spring, 14 stopper, 15 bearing, 16 jack, 17 base, 17a
Through hole, 18 fitting groove, 19 groove, 21 horizontal spring, 22 wedge, 33 rotating body, 34
Rack, 35 gear mechanism, 35a spur gear, 35b face gear, 35c gear, 3
6 Wide gear, 41 Load cell, 42 Strain gauge (Rope tension detection means), 43
Tension meter (rope tension detecting means), 43a small diameter roller, 43b large diameter roller, 51 controller, 52 motor, 53a motor side gear, 53b rotating body side gear, 54 rotating body, 55 motor side wide gear, 56 rod side gear, 57 Displacement sensor, 58 joints, 61 pins, 71 weights.

Claims (15)

Rope tension detecting means for detecting the rope tension generated at the rope whose end is fastened by a rope stopper and suspended in the hoistway as deformation of the elastic body;
Rope twisting means for rotating the rope around a central axis in a direction to eliminate twisting that occurs in the rope in accordance with the value of the rope tension detected by the rope tension detecting means. apparatus.   The rope rotating means includes a rotating body integrally connected to the end of the end rod of the rope stopper metal fitting coaxially with the rotating body, and the rotating body that moves in the vertical direction by the rope tension. The elevator rope torsion elimination apparatus according to claim 1, further comprising: a rotation conversion unit configured to rotate about an axis.   The elevator rope torsion eliminating apparatus according to claim 2, wherein the rope tension detecting means includes a compression spring that is elastically deformed in accordance with the value of the rope tension. The rope tension detecting means includes a base, a stopper fixed to an end portion of the rotating body that passes through the through hole of the base, and the rotating body provided between the base and the stopper so as to surround the rotating body. A compression spring;
The rotation converting means includes a groove formed in a spiral shape on a peripheral surface of the rotating body, and a protrusion having a base end fixed to the through hole and a distal end engaged with the groove. Item 4. The elevator rope twisting eliminating apparatus according to Item 3.   The elevator rope twisting eliminating apparatus according to claim 4, wherein a bearing is provided between the stopper and the compression spring. The rope tension detecting means includes a base, a stopper fixed to an intermediate portion of the rotating body that passes through the through hole of the base, and the rotating body provided between the base and the stopper so as to surround the rotating body. A compression spring;
The rotation converting means includes a rack provided on the rotating body along the axial direction, a gear mechanism meshed with the rack, and a wide gear fixed to the rotating body and meshed with the gear mechanism. The twist elimination apparatus of the elevator rope of Claim 3. The rope tension detecting means includes a base, a stopper fixed to an end of the rotating body that passes through the through-hole of the base, and an axial movement of the rotating body provided between the base and the stopper. A wedge that converts the movement into a horizontal movement, and the compression spring that horizontally presses the wedge from the back side opposite to the rotating body,
The rotation converting means includes a groove formed in a spiral shape on a peripheral surface of the rotating body, and a protrusion having a base end fixed to the through hole and a distal end engaged with the groove. Item 4. The elevator rope twisting eliminating apparatus according to Item 3. The rope tension detecting means includes a base, a stopper fixed to an intermediate portion of the rotating body that passes through the through hole of the base, and an axial movement of the rotating body provided between the base and the stopper. A wedge that converts the movement into a horizontal movement, and the compression spring that horizontally presses the wedge from the back side opposite to the rotating body,
The rotation converting means includes a rack provided on the wedge, a gear mechanism meshed with the rack, and a wide gear fixed to the rotating body and meshed with the gear mechanism. The twist prevention device of the elevator rope as described in 2.   The elevator rope twisting eliminating apparatus according to claim 7 or 8, wherein a bearing is provided between the stopper and the wedge. The rope tension detecting means has an elastic body that deforms according to the value of the rope tension, and a sensor that detects a deformation amount of the elastic body,
The elevator rope torsion eliminating device according to claim 1, wherein the rope rotating means rotates the rope around a central axis according to a value of the sensor. The twist elimination apparatus of the elevator rope according to any one of claims 1 to 10,
The rope;
Whether suspended from the rope,
A hoisting machine that drives the rope to raise and lower the car in a hoistway;
Elevator device equipped with. Rope tension detecting means for detecting the rope tension generated at the rope whose end is fastened by a rope stopper and suspended in the hoistway as deformation of the elastic body;
An elevator rope attachment device comprising: rope rotation means for rotating the rope around a central axis in a direction to eliminate torsion occurring in the rope according to the value of the rope tension detected by the rope tension detection means . An elevator rope attachment method for attaching an elevator rope using the elevator rope attachment device according to claim 12,
Installing the elevator rope attachment device on the machine room floor;
Fixing the rotating body to the rope with the rope stopper;
A method of attaching an elevator rope, comprising the step of suspending the rope in a hoistway. 13. The elevator rope attachment device according to claim 12, further comprising a jack that lifts the rope tension detection means and the rope rotation means when attaching the rope. An elevator rope attachment method for attaching an elevator rope using the elevator rope attachment device according to claim 14,
Installing the elevator rope mounting device on the machine room floor with the jack contracted;
Fixing the rotating body to the rope with the rope stopper;
Lifting the base with the jack and placing the rope tension on a compression spring; and
A method of attaching an elevator rope, comprising the step of suspending the rope in a hoistway.

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