Elevator control cable support device

Abstract

To provide an elevator control cable support device that can reduce the weight of an elevator car.SOLUTION: In an elevator control cable support device 7, a drum device 71 has a drum 713 around which a control cable 6 connected to a car 2 is wound. A holding device 72 holds the control cable 6 unwound from the drum 713. An interlocking mechanism 74 rotates the drum 713 in a direction to wind up the control cable 6 when the car 2 moves upward. The drum device 71 is provided above the movement range of the car 2. The holding device 72 is provided on the upper part of the car 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to an elevator control cable support device that supports a control cable connected to a car.

Background Art

[0002] Patent Document 1 discloses an elevator that supports an intermediate portion of a control cable hanging down from the lower part of a car by a cable support unit.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional elevator disclosed in Patent Document 1, since the control cable hangs down from the lower part of the car, the load of the control cable is applied to the lower part of the car. Therefore, in the conventional elevator, it is necessary to increase the strength of the lower part of the car. As a result, in the conventional elevator, the weight of the car becomes large.

[0005] The present disclosure solves the above problems, and an object thereof is to provide an elevator control cable support device capable of reducing the weight of a car.

Means for Solving the Problems

[0006] The elevator control cable support device according to this disclosure comprises a drum device having a drum around which a control cable connected to the car is wound, a holding device for holding the control cable unwound from the drum, and a rotational force applying unit for rotating the drum in the direction of winding the control cable when the car moves upward. Of the drum device and the holding device, one is the car-side device and the other is the support-side device, the car-side device is provided at the top of the car, and the support-side device is provided above the range of movement of the car. [Effects of the Invention]

[0007] The elevator control cable support device described herein makes it possible to reduce the weight of the elevator car. [Brief explanation of the drawing]

[0008] [Figure 1] This is a side view showing the main parts of the elevator according to Embodiment 1. [Figure 2] This is a side view showing the main parts of the elevator according to Embodiment 2. [Figure 3] This is a side view showing the main parts of the elevator according to Embodiment 3. [Figure 4] This is a side view showing the main parts of the elevator according to Embodiment 4. [Figure 5] This is a side view showing the main parts of the elevator according to Embodiment 5. [Figure 6] This is a side view showing the main parts of the elevator according to Embodiment 6. [Figure 7] This is a side view showing the main parts of the elevator according to Embodiment 7. [Figure 8] Figure 7 is an enlarged view showing the drum device and adjustment mechanism. [Figure 9] Figure 8 is a top view showing the drum device and adjustment mechanism. [Figure 10] This is a front view showing the drum device and adjustment mechanism as seen along arrow A in Figure 9. [Figure 11]This is a top view showing the drum device and adjustment mechanism of an elevator according to Embodiment 8. [Figure 12] This is a front view showing the drum device and adjustment mechanism as seen along arrow B in Figure 11. [Figure 13] This is a top view showing the drum device and adjustment mechanism of an elevator according to Embodiment 9. [Figure 14] This is a front view showing the drum device and adjustment mechanism as seen along arrow C in Figure 13. [Modes for carrying out the invention]

[0009] The embodiments for carrying out the subject matter of this disclosure will be described with reference to the attached figures. In each figure, the same or corresponding parts are denoted by the same reference numerals, and redundant explanations are simplified or omitted as appropriate. The subject matter of this disclosure is not limited to the following embodiments, and any modification of any component of the embodiments or omission of any component of the embodiments is possible without departing from the spirit of this disclosure.

[0010] Embodiment 1. Figure 1 is a side view showing the main parts of an elevator according to Embodiment 1. In the figure, a car 2 and a counterweight (not shown) are suspended in the hoistway 1 by a main rope 3. A pair of car suspension wheels 21 are provided at the bottom of the car 2. A counterweight suspension wheel (not shown) is provided at the top of the counterweight.

[0011] A hoisting machine 4 and a control panel 5 are installed in the upper part of the hoistway 1. The hoisting machine 4 and the control panel 5 are supported by support members 10 fixed within the hoistway 1. Therefore, the elevator in this embodiment is a machine room-less elevator, meaning there is no machine room.

[0012] The hoisting machine 4 comprises a hoisting machine body 41 and a drive sheave 42.

[0013] The hoisting machine main body 41 has a motor. The drive sheave 42 is rotatably provided on the hoisting machine main body 41. The drive sheave 42 rotates with respect to the hoisting machine main body 41 by the driving force of the motor of the hoisting machine main body 41.

[0014] The control panel 5 controls the operation of the elevator. The rotation of the drive sheave 42 with respect to the hoisting machine main body 41 is controlled by the control panel 5.

[0015] The main rope 3 has a first end portion 3a and a second end portion (not shown). The first end portion 3a and the second end portion are connected to the support member 10 at the upper part in the hoistway 1. The main rope 3 is wound around from the first end portion 3a in the order of the pair of car suspension wheels 21, the drive sheave 42, and the counterweight suspension wheel, and reaches the second end portion. Therefore, the suspension method of the car 2 and the counterweight by the main rope 3 is a 2:1 roping method.

[0016] The main rope 3 moves in accordance with the rotation of the drive sheave 42. The pair of car suspension wheels 21 and the counterweight suspension wheel rotate in accordance with the movement of the main rope 3. Thereby, the car 2 and the counterweight move vertically in the hoistway 1 in accordance with the rotation of the drive sheave 42. Further, the pair of car suspension wheels 21 and the counterweight suspension wheel rotate in accordance with the movement of the car 2 and the counterweight. The hoisting machine 4 and the control panel 5 are provided above the respective movement ranges of the car 2 and the counterweight.

[0017] A control cable 6 is connected to the control panel 5. A part of the control cable 6 hangs down in the hoistway 1. The control cable 6 is connected to the car 2 in the hoistway 1. Thereby, the control panel 5 and the car 2 can communicate with each other via the control cable 6. The control cable 6 moves in the hoistway 1 as the car 2 moves.

[0018] The control cable 6 is supported by a control cable support device 7. The control cable support device 7 has a drum device 71, a holding device 72, and an interlocking mechanism 74.

[0019] The drum device 71 is installed as a support device in the upper part of the elevator shaft 1. As a support device, the drum device 71 is installed above the respective ranges of movement of the cage 2 and the counterweight. The drum device 71 is supported by the support member 10.

[0020] The drum device 71 includes a drum support 711, a drum rotation shaft 712, and a drum 713.

[0021] The drum support base 711 is fixed to the support member 10. The drum rotation shaft 712 is rotatably mounted on the drum support base 711. The drum rotation shaft 712 is positioned horizontally. In this embodiment, the drum rotation shaft 712 is positioned parallel to the axis of the drive sheave 42.

[0022] The drum 713 is a cylindrical member fixed to the drum rotation shaft 712. The drum 713 is positioned coaxially with the drum rotation shaft 712. The drum 713 rotates integrally with the drum rotation shaft 712 relative to the drum support base 711, about its own axis.

[0023] The control cable 6 is wound around the drum 713. In the drum device 71, the winding of the control cable 6 onto the drum 713 and the unwinding of the control cable 6 from the drum 713 are performed in accordance with the rotation of the drum 713.

[0024] The holding device 72 is installed on the upper part of the cage 2 as a cage-side device. The control cable 6 is connected from the control panel 5 to the cage 2 via the drum device 71 and the holding device 72. The holding device 72 holds the control cable 6. The control cable 6 is connected to the equipment included in the cage 2.

[0025] The interlocking mechanism 74 is a rotational force application unit that applies rotational force to the drum 713. The interlocking mechanism 74 rotates the drum 713 in the direction of winding up the control cable 6 when the cage 2 moves upward. The interlocking mechanism 74 also rotates the drum 713 in the direction of unwinding the control cable 6 when the cage 2 moves downward. In other words, the interlocking mechanism 74 rotates the drum 713 in accordance with the movement of the cage 2. The interlocking mechanism 74 is installed above the respective ranges of movement of the cage 2 and the counterweight.

[0026] The interlocking mechanism 74 mechanically links the drum 713 to the rotation of the drive sheave 42. In this way, the interlocking mechanism 74 imparts the rotational force of the drive sheave 42 to the drum 713. The interlocking mechanism 74 includes a first pulley 741, a second pulley 742, and a transmission body 743.

[0027] The first pulley 741 is fixed as the first rotating member to the rotation axis of the drive sheave 42. As a result, the first pulley 741 rotates integrally with the drive sheave 42 about the axis of the drive sheave 42.

[0028] The second pulley 742 is fixed to the drum rotation shaft 712 as a second rotating member. As a result, the second pulley 742 rotates integrally with the drum rotation shaft 712 and the drum 713 around the axis of the drum 713.

[0029] The transmission body 743 is an endless belt wrapped between the first pulley 741 and the second pulley 742. The transmission body 743 moves in accordance with the rotation of the first pulley 741. The second pulley 742 rotates in accordance with the movement of the transmission body 743. As a result, the rotation of the drive sheave 42 is transmitted to the drum 713 via the first pulley 741, the transmission body 743, and the second pulley 742. The drum 713 rotates as the rotation of the drive sheave 42 is transmitted to the drum 713. As a result, the drum 713 is linked to the rotation of the drive sheave 42 via the interlocking mechanism 74.

[0030] The drum 713 rotates in the direction of winding up the control cable 6 by being linked to the rotation of the drive sheave 42 via the interlocking mechanism 74 when the cage 2 moves upward. Also, the drum 713 rotates in the direction of unwinding the control cable 6 by being linked to the rotation of the drive sheave 42 via the interlocking mechanism 74 when the cage 2 moves downward.

[0031] In the interlocking mechanism 74, the outer diameters of the first pulley 741 and the second pulley 742 are set so that the amount of winding and unwinding of the control cable 6 by the drum 713 corresponds to the travel distance of the basket 2.

[0032] Next, the operation of the elevator will be explained. When the drive sheave 42 rotates due to the control of the control panel 5 for the hoisting machine 4, the car 2 and the counterweight move vertically within the hoistway 1. The direction of rotation of the drive sheave 42 when the car 2 moves upward is opposite to the direction of rotation of the drive sheave 42 when the car 2 moves downward.

[0033] As the cage 2 moves upward, the drum 713 rotates in the direction of winding the control cable 6, in conjunction with the rotation of the drive sheave 42 via the interlocking mechanism 74. As a result, the cage 2 moves upward while the drum 713 winds up the control cable 6.

[0034] As the cage 2 moves downward, the drum 713 rotates in the direction that pays out the control cable 6, in conjunction with the rotation of the drive sheave 42 via the interlocking mechanism 74. As a result, the cage 2 moves downward while the drum 713 pays out the control cable 6.

[0035] In this type of elevator control cable support device 7, the drum device 71 is positioned above the range of motion of the car 2. A holding device 72 is also provided at the top of the car 2. Furthermore, the drum 713 rotates in a direction that winds up the control cable 6 when the car 2 moves upward, via an interlocking mechanism 74. This allows the control cable 6 to hang down from a position above the range of motion of the car 2. This prevents the load of the control cable 6 from being applied to the car 2. Additionally, since the control cable 6 is prevented from hanging down from the bottom of the car 2, there is no need to increase the strength of the bottom of the car 2. Furthermore, there is no need to provide suspension equipment for the control cable 6 at the bottom of the car 2. Therefore, the weight of the car 2 can be reduced. The material cost of the car 2 can also be reduced.

[0036] Furthermore, since the control cable 6 can be prevented from hanging down from the bottom of the car 2, it is possible to suppress imbalance in the car 2 caused by the load of the control cable 6. This eliminates the need to install balance weights in the car 2 to correct the imbalance, making the manufacturing process of the car 2 easier and further reducing the weight of the car 2. In addition, since the control cable 6 can be avoided from being connected to the bottom of the car 2, it is possible to optimize the placement of equipment installed at the bottom of the car 2.

[0037] Furthermore, the interlocking mechanism 74 mechanically links the drum 713 to the rotation of the drive sheave 42. This makes it easy to prevent the control cable 6 from becoming loose or excessive tension from being applied to the control cable 6 when the cage 2 moves.

[0038] Embodiment 2. Figure 2 is a side view showing the main parts of an elevator according to Embodiment 2. In the figure, a machine room 20 is provided above the hoistway 1. The hoisting machine 4, control panel 5, drum device 71, and interlocking mechanism 74 are located in the machine room 20. Therefore, the elevator in this embodiment is an elevator with a machine room 20.

[0039] The hoisting machine 4, control panel 5, drum device 71, and interlocking mechanism 74 are supported on the floor 201 of the machine room 20. As a result, the hoisting machine 4, control panel 5, drum device 71, and interlocking mechanism 74 are positioned above the respective ranges of movement of the cage 2 and the counterweight.

[0040] The main rope 3 is wound around the drive sheave 42 in the machine room 20. The control cable 6 is wound around the drum 713 in the machine room 20.

[0041] The partition wall 202 forming the floor surface 201 of the machine room 20 has a main rope passage hole (not shown) and a control cable passage hole (not shown). The main rope passage hole and the control cable passage hole penetrate the partition wall 202. The main rope 3, wound around the drive sheave 42, reaches the elevator shaft 1 from the machine room 20 through the main rope passage hole. The control cable 6, unwound from the drum 713, reaches the elevator shaft 1 from the machine room 20 through the control cable passage hole.

[0042] The first end 3a of the main rope 3 is connected to the top of the cage 2. The second end of the main rope 3 is connected to the top of the counterweight. Therefore, the suspension method of the cage 2 and the counterweight by the main rope 3 is a 1:1 roping method. The other configurations and operations are the same as in Embodiment 1.

[0043] Thus, even in elevators with a machine room 20, the control cable 6 can be positioned above the range of motion of the elevator car 2. Furthermore, it is possible to prevent the control cable 6 from hanging down from the bottom of the elevator car 2. Therefore, the same effects as in Embodiment 1 can be obtained even in elevators with a machine room 20.

[0044] In embodiments 1 and 2, the transmission body 743 is an endless belt. However, the transmission body 743 is not limited to this, and may be an endless chain, for example. If the transmission body 743 is a chain, the first rotating member and the second rotating member around which the transmission body 743 is wrapped are sprockets, respectively.

[0045] Embodiment 3. Figure 3 is a side view showing the main parts of the elevator according to Embodiment 3. The control cable support device 7 includes a drum device 71, a holding device 72, and an interlocking mechanism 75.

[0046] The drum device 71 is installed on the upper part of the cage 2 as a cage-side device. The configuration of the drum device 71 is the same as in Embodiment 1.

[0047] The holding device 72 is provided as a support-side device in the upper part of the elevator shaft 1. The holding device 72, as a support-side device, is provided above the respective movement ranges of the cage 2 and the counterweight. The holding device 72 is supported by the support member 10. The configuration of the holding device 72 is the same as in Embodiment 1.

[0048] The control cable 6 is connected from the control panel 5 to the cage 2 via the holding device 72 and the drum device 71. The holding device 72 holds the control cable 6. In the drum device 71, the control cable 6 is wound onto the drum 713. The control cable 6 is connected to the equipment contained in the cage 2.

[0049] The interlocking mechanism 75 is a rotational force application unit that applies rotational force to the drum 713. The interlocking mechanism 75 rotates the drum 713 in the direction of winding up the control cable 6 when the cage 2 moves upward. The interlocking mechanism 75 also rotates the drum 713 in the direction of unwinding the control cable 6 when the cage 2 moves downward. In other words, the interlocking mechanism 75 rotates the drum 713 in accordance with the movement of the cage 2. The interlocking mechanism 75 is installed on the cage 2.

[0050] The interlocking mechanism 75 mechanically interlocks the drum 713 with the rotation of one of the cage trolleys 21. In this way, the interlocking mechanism 74 applies the rotational force of the cage trolley 21 to the drum 713. The interlocking mechanism 75 includes a first pulley 751, a second pulley 752, a transmission body 753, and a guide device 754.

[0051] The first pulley 751 is fixed as the first rotating member to the rotation axis of the cage trolley 21. As a result, the first pulley 751 rotates integrally with the cage trolley 21 about the axis of the cage trolley 21.

[0052] The second pulley 752 is fixed to the drum rotation shaft 712 as a second rotating member. As a result, the second pulley 752 rotates integrally with the drum rotation shaft 712 and the drum 713 around the axis of the drum 713.

[0053] The transmission body 753 is an endless belt wrapped between the first pulley 751 and the second pulley 752. The transmission body 753 moves in accordance with the rotation of the first pulley 751. The second pulley 752 rotates in accordance with the movement of the transmission body 753. As a result, the rotation of the cage trolley 21 is transmitted to the drum 713 via the first pulley 751, the transmission body 753, and the second pulley 752. The drum 713 rotates as the rotation of the cage trolley 21 is transmitted to the drum 713. As a result, the drum 713 is linked to the rotation of the cage trolley 21 via the interlocking mechanism 75.

[0054] In the interlocking mechanism 75, the outer diameters of the first pulley 751 and the second pulley 752 are set so that the amount of winding and unwinding of the control cable 6 by the drum 713 corresponds to the travel distance of the basket 2.

[0055] The guide device 754 positions the transmission body 753 to avoid the cage 2. The guide device 754 has a plurality of guide rollers 755.

[0056] Multiple guide rollers 755 are positioned at a distance from each other on the cage 2. The transmission body 753 is wrapped around the multiple guide rollers 755. As a result, the transmission body 753 avoids the cage 2 and reaches the drum device 71 from the cage suspension wheel 21. The transmission body 753 moves in accordance with the rotation of the first pulley 751, guided by the multiple guide rollers 755.

[0057] Each cage trolley 21 rotates in accordance with the movement of the cage 2. When the cage 2 moves upward, the rotation of the cage trolley 21 is linked to the drum 713 via the interlocking mechanism 75, causing the drum 713 to rotate in the direction of winding up the control cable 6. Similarly, when the cage 2 moves downward, the rotation of the cage trolley 21 is linked to the drum 713 via the interlocking mechanism 75, causing the drum 713 to rotate in the direction of unwinding the control cable 6. The other configurations are the same as in Embodiment 1.

[0058] Next, the operation of the elevator will be explained. When the drive sheave 42 rotates due to the control of the control panel 5 to the hoisting machine 4, the car 2 and counterweight move vertically within the hoistway 1. As the car 2 moves vertically, each car suspension wheel 21 rotates in accordance with the movement of the car 2. The direction of rotation of the car suspension wheels 21 when the car 2 moves upward is opposite to the direction of rotation of the car suspension wheels 21 when the car 2 moves downward.

[0059] As the cage 2 moves upward, the drum 713 rotates in the direction of winding up the control cable 6, as it is linked to the rotation of the cage suspension wheel 21 via the interlocking mechanism 75. As a result, the cage 2 moves upward while the drum 713 winds up the control cable 6.

[0060] As the cage 2 moves downward, the drum 713 rotates in the direction that pays out the control cable 6, as it is linked to the rotation of the cage suspension wheel 21 via the interlocking mechanism 75. As a result, the cage 2 moves downward while the drum 713 pays out the control cable 6.

[0061] In this elevator control cable support device 7, the holding device 72 is installed above the range of movement of the car 2. Additionally, the drum device 71 is installed above the car 2. Furthermore, the drum 713 rotates in a direction that winds up the control cable 6 by the interlocking mechanism 75 when the car 2 moves upward. This allows the control cable 6 to hang down from a position above the range of movement of the car 2. It also prevents the control cable 6 from hanging down from the bottom of the car 2. Therefore, the same effects as in Embodiment 1 can be obtained. Furthermore, even if the drum device 71 cannot be installed in the upper part of the hoistway 1 due to space limitations, the holding device 72, which requires less installation space than the drum device 71, can be installed in the upper part of the hoistway 1. This improves the flexibility of the installation of the control cable support device 7.

[0062] Furthermore, the interlocking mechanism 75 mechanically links the drum 713 to the rotation of the cage suspension wheel 21. This makes it easy to prevent the control cable 6 from slackening or excessive tension from being applied to the control cable 6 when the cage 2 moves.

[0063] Embodiment 4. Figure 4 is a side view showing the main parts of the elevator according to Embodiment 4. In the figure, a machine room 20 is provided above the hoistway 1. The hoisting machine 4, control panel 5, and holding device 72 are located in the machine room 20. Therefore, the elevator in this embodiment is an elevator that has a machine room 20.

[0064] The hoisting machine 4, control panel 5, and holding device 72 are supported on the floor 201 of the machine room 20. As a result, the hoisting machine 4, control panel 5, and holding device 72 are positioned above the respective ranges of movement of the cage 2 and the counterweight.

[0065] The main rope 3 is wound around the drive sheave 42 in the machine room 20. The control cable 6 is held in the holding device 72 in the machine room 20.

[0066] The partition wall 202 forming the floor surface 201 of the machine room 20 has a main rope passage hole (not shown) and a control cable passage hole (not shown). The main rope passage hole and the control cable passage hole penetrate the partition wall 202. The main rope 3, which is wound around the drive sheave 42, reaches the elevator shaft 1 from the machine room 20 through the main rope passage hole. The control cable 6 hanging from the holding device 72 reaches the elevator shaft 1 from the machine room 20 through the control cable passage hole.

[0067] The first end 3a and the second end of the main rope 3 are connected to the partition wall 202. A single cage suspension wheel 21 is provided at the top of the cage 2. The main rope 3 is wound around the cage suspension wheel 21, the drive sheave 42, and the counterweight suspension wheel in that order, starting from the first end 3a, and reaching the second end. Therefore, the suspension method for the cage 2 and the counterweight by the main rope 3 is a 2:1 roping system.

[0068] The interlocking mechanism 75 mechanically interlocks the drum 713 with the rotation of the cage trolley 21. In this way, the interlocking mechanism 74 imparts the rotational force of the cage trolley 21 to the drum 713. The interlocking mechanism 75 includes a first pulley 751, a second pulley 752, and a transmission body 753. The configurations of the first pulley 751, the second pulley 752, and the transmission body 753 are the same as in Embodiment 3.

[0069] In this embodiment, since both the first pulley 751 and the second pulley 752 are located on the upper part of the cage 2, the transmission body 753 can be wrapped around the first pulley 751 and the second pulley 752 without using the guide device 754. Therefore, in this embodiment, the guide device 754 in Embodiment 3 is not provided on the cage 2. In this embodiment, the transmission body 753 is wrapped around the first pulley 751 and the second pulley 752 without being wrapped around each guide roller 755 of the guide device 754. Other configurations and operations are the same as in Embodiment 3.

[0070] Thus, even in elevators where a machine room 20 is present, the control cable 6 can be positioned above the range of motion of the elevator car 2. Furthermore, it is possible to prevent the control cable 6 from hanging down from the bottom of the elevator car 2. Therefore, the same effects as in Embodiment 3 can be obtained.

[0071] In embodiments 3 and 4, the transmission body 753 is an endless belt. However, the transmission body 753 is not limited to this, and may be an endless chain, for example. If the transmission body 753 is a chain, the first rotating member and the second rotating member around which the transmission body 753 is wrapped are sprockets, respectively.

[0072] Embodiment 5. Figure 5 is a side view showing the main parts of the elevator according to Embodiment 5. In this embodiment, an elastic body 76 is used instead of the interlocking mechanism 74 in Embodiment 1. The control cable support device 7 includes a drum device 71, a holding device 72, and an elastic body 76. The configurations of the drum device 71 and the holding device 72 are the same as in Embodiment 1.

[0073] The elastic body 76 is a rotational force applying unit that imparts rotational force to the drum 713. The elastic body 76 is provided on the drum support base 711. The elastic body 76 imparts an elastic restoring force to the drum 713 as a rotational force via the drum rotation shaft 712 in the direction of winding the control cable 6. As a result, the elastic restoring force of the elastic body 76 is constantly applied to the drum 713 in the direction of winding the control cable 6. A torsion spring, a spiral spring, or the like can be used as the elastic body 76.

[0074] The drum 713 rotates in the direction of winding the control cable 6 due to the elastic restoring force of the elastic body 76 when the cage 2 moves upward. Also, when the cage 2 moves downward, the drum 713 rotates in the direction of unwinding the control cable 6 against the elastic restoring force of the elastic body 76 due to the weight of the cage 2. The other configurations are the same as in Embodiment 1.

[0075] Next, the operation of the elevator will be explained. When the drive sheave 42 rotates due to the control of the control panel 5 for the hoisting machine 4, the car 2 and the counterweight move vertically within the hoistway 1. The direction of rotation of the drive sheave 42 when the car 2 moves upward is opposite to the direction of rotation of the drive sheave 42 when the car 2 moves downward.

[0076] As the cage 2 moves upward, the elastic restoring force of the elastic body 76 causes the drum 713 to rotate in the direction of winding up the control cable 6. As a result, the drum 713 winds up the control cable 6 while the cage 2 moves upward.

[0077] As the cage 2 moves downward, the weight of the cage 2 causes the drum 713 to rotate in the direction that pays out the control cable 6, against the elastic restoring force of the elastic body 76. As a result, the drum 713 pays out the control cable 6 as the cage 2 moves downward.

[0078] In this elevator control cable support device 7, the same effects as in Embodiment 1 can be obtained. Furthermore, the elastic restoring force of the elastic body 76 can be applied to the drum 713 as a rotational force. As a result, the number of parts in the control cable support device 7 can be reduced compared to Embodiments 1 to 4, and the structure of the control cable support device 7 can be simplified. In addition, it is no longer necessary to link the drum 713 to the rotation of the drive sheave 42 or to the rotation of the car suspension wheel 21. As a result, the degree of freedom in the installation position of the drum device 71 can be increased, and the installation work of the control cable support device 7 can be made easier.

[0079] Furthermore, even when the elevator car 2 is moving, the elastic restoring force of the elastic body 76 can always maintain tension on the control cable 6. This makes it possible to more reliably suppress the lateral swaying of the control cable 6 when the elevator car 2 is moving. Consequently, it is possible to more reliably prevent the control cable 6 from getting caught on beams or other objects in the elevator shaft 1 when the elevator car 2 is moving.

[0080] Embodiment 6. Figure 6 is a side view showing the main parts of an elevator according to Embodiment 6. In the figure, a machine room 20 is provided above the hoistway 1. The hoisting machine 4, control panel 5, drum device 71, and elastic body 76 are located in the machine room 20. Therefore, the elevator in this embodiment is an elevator that has a machine room 20.

[0081] The hoisting machine 4, control panel 5, drum device 71, and elastic body 76 are supported on the floor 201 of the machine room 20. As a result, the hoisting machine 4, control panel 5, drum device 71, and elastic body 76 are positioned above the respective ranges of movement of the cage 2 and the counterweight.

[0082] The main rope 3 is wound around the drive sheave 42 in the machine room 20. The control cable 6 is wound around the drum 713 in the machine room 20.

[0083] The partition wall 202 forming the floor surface 201 of the machine room 20 has a main rope passage hole (not shown) and a control cable passage hole (not shown). The main rope passage hole and the control cable passage hole penetrate the partition wall 202. The main rope 3, wound around the drive sheave 42, reaches the elevator shaft 1 from the machine room 20 through the main rope passage hole. The control cable 6, unwound from the drum 713, reaches the elevator shaft 1 from the machine room 20 through the control cable passage hole.

[0084] The first end 3a of the main rope 3 is connected to the top of the cage 2. The second end of the main rope 3 is connected to the top of the counterweight. Therefore, the suspension method of the cage 2 and the counterweight by the main rope 3 is a 1:1 roping method. The other configurations and operations are the same as in Embodiment 5.

[0085] Thus, the same effects as in Embodiment 1 can be obtained even in elevators with a machine room 20. Furthermore, the elastic restoring force of the elastic body 76 can be applied to the drum 713 as a rotational force. As a result, the same effects as in Embodiment 5 can be obtained even in elevators with a machine room 20.

[0086] In embodiments 5 and 6, the drum device 71 is provided as a support-side device above the respective movement ranges of the cage 2 and the counterweight, and the holding device 72 is provided as a cage-side device on the upper part of the cage 2. However, the holding device 72 may be provided as a support-side device above the respective movement ranges of the cage 2 and the counterweight, and the drum device 71 may be provided as a cage-side device on the upper part of the cage 2. Even in this case, the same effects as in embodiment 1 can be obtained. Furthermore, the structure of the control cable support device 7 can be simplified, and the installation work of the control cable support device 7 can be made easier. In addition, it is possible to more reliably prevent the control cable 6 from getting caught on beams or other objects in the elevator shaft 1.

[0087] Embodiment 7. Figure 7 is a side view showing the main parts of the elevator according to Embodiment 7. The control cable support device 7 includes a drum device 71, a holding device 72, an elastic body 76, and an adjustment mechanism 77. The configurations of the drum device 71, the holding device 72, and the elastic body 76 are the same as in Embodiment 6.

[0088] A suspension reference line P is pre-set along the vertical direction in the hoistway 1. The holding device 72 is positioned on the suspension reference line P. When the elevator car 2 moves in the vertical direction, the holding device 72, as a car-side device, moves along the suspension reference line P. The position of the control cable 6 that reaches the holding device 72 from the drum 713 coincides with the suspension reference line P.

[0089] When the control cable 6 is wound around the drum 713, the control cable 6 is laminated on the outer surface of the drum 713. The thickness of the laminated control cable 6 relative to the drum 713 increases as the drum 713 winds up the control cable 6 and decreases as the drum 713 unwinds the control cable 6. Therefore, if the position of the drum device 71 is fixed with respect to the suspension reference line P, the position of the control cable 6 from the drum 713 to the holding device 72 will deviate from the suspension reference line P due to the change in the laminated thickness of the control cable 6 relative to the drum 713.

[0090] The adjustment mechanism 77 adjusts the position of the drum device 71 relative to the suspension reference line P so that the position of the control cable 6 reaching from the drum 713 to the holding device 72 is maintained to coincide with the suspension reference line P. The stacking thickness of the control cable 6 relative to the drum 713 changes according to the rotation of the drum 713. Therefore, the adjustment mechanism 77 adjusts the position of the drum device 71 relative to the suspension reference line P according to the rotation of the drum 713.

[0091] The adjustment mechanism 77 moves the drum device 71 away from the suspension reference line P by rotating the drum 713 in the direction of winding the control cable 6. The adjustment mechanism 77 also moves the drum device 71 away from the suspension reference line P by rotating the drum 713 in the direction of unwinding the control cable 6. As a result, even if the stacking thickness of the control cable 6 relative to the drum 713 changes as the drum 713 rotates, the position of the control cable 6 reaching the holding device 72 from the drum 713 is maintained to coincide with the suspension reference line P.

[0092] Figure 8 is an enlarged view showing the drum device 71 and adjustment mechanism 77 of Figure 7. Figure 9 is a top view showing the drum device 71 and adjustment mechanism 77 of Figure 8. Figure 10 is a front view showing the drum device 71 and adjustment mechanism 77 as seen along arrow A in Figure 9. In this embodiment, the control cable 6 is belt-shaped. Therefore, in this embodiment, the width dimension of the control cable 6 is larger than the thickness dimension of the control cable 6. The control cable 6 is wound around the drum 713 with the width direction of the control cable 6 aligned with the axial direction of the drum 713.

[0093] The control cable 6, which extends from the drum 713 to the holding device 72, is passed through a control cable passage hole 203 formed in the partition wall 202, as shown in Figure 9. The suspension reference line P is set as a straight line passing through the control cable passage hole 203.

[0094] In the drum device 71, one drum support 711 is positioned on each side of the drum 713 in the axial direction of the drum 713. The drum rotation shaft 712 and the drum 713 are supported by the two drum support 711.

[0095] The adjustment mechanism 77 includes a pair of support rails 771 and a gear device 772.

[0096] A pair of support rails 771 are fixed horizontally to the floor surface 201 of the machine room 20. The pair of support rails 771 are arranged parallel to each other. The axis of the drum 713 is perpendicular to each support rail 771 when the drum device 71 is viewed from above.

[0097] The drum support bases 711 are slidably mounted one on each of the pair of support rails 771. This allows the drum device 71 to move relative to each support rail 771 in the longitudinal direction of each support rail 771.

[0098] The gear unit 772 is positioned further from the drum 713 than one of the drum supports 711 in the axial direction of the drum 713. The gear unit 772 includes a rack gear 773, a first gear 774, a second gear 775, and a third gear 776.

[0099] The rack gear 773 is fixed to the floor surface 201. The rack gear 773 is arranged parallel to each support rail 771. The rack gear 773 has multiple teeth arranged in the longitudinal direction of the rack gear 773.

[0100] The first gear 774 is fixed to the drum rotation shaft 712. As a result, the first gear 774 rotates integrally with the drum rotation shaft 712 and the drum 713 around the axis of the drum 713. The first gear 774 is positioned coaxially with the axis of the drum 713. Multiple teeth are provided on the outer circumference of the first gear 774, arranged in the circumferential direction.

[0101] The second gear 775 and the third gear 776 are positioned between the rack gear 773 and the first gear 774. The second gear 775 is positioned between the third gear 776 and the first gear 774. The respective axes of the second gear 775 and the third gear 776 are attached to one of the drum supports 711. The respective axes of the second gear 775 and the third gear 776 are parallel to the axis of the first gear 774.

[0102] Multiple teeth are provided on the outer circumference of the second gear 775, arranged in the circumferential direction. In this embodiment, the outer diameter of the second gear 775 is the same as the outer diameter of the first gear 774.

[0103] Multiple teeth are provided on the outer circumference of the third gear 776, arranged in the circumferential direction. In this embodiment, the outer diameter of the third gear 776 is larger than the outer diameter of the second gear 775.

[0104] The second gear 775 meshes with the first gear 774 and the third gear 776, respectively. The third gear 776 meshes with the second gear 775 and the rack gear 773, respectively. As a result, the second gear 775 and the third gear 776 rotate in accordance with the rotation of the first gear 774.

[0105] The third gear 776 moves along the longitudinal direction of the rack gear 773 while engaging with it as the third gear 776 rotates. As a result, the drum device 71 moves along the longitudinal direction of the support rail 771 in accordance with the rotation of the drum rotation axis 712 and the drum 713.

[0106] Therefore, as the drum 713 rotates in the direction of winding up the control cable 6, the gear device 772 operates, causing the drum device 71 to move away from the suspension reference line P as the axis of the drum 713 moves away from the suspension reference line P. Also, as the drum 713 rotates in the direction of unwinding the control cable 6, the gear device 772 operates, causing the drum device 71 to move closer to the suspension reference line P as the axis of the drum 713 moves towards the suspension reference line P.

[0107] The distance traveled by the drum device 71 when the drum 713 rotates is equal to the change in the stacking thickness of the control cable 6 relative to the drum 713 when the drum 713 rotates, due to the adjustment of the gear ratio in the gear device 772. As a result, when the drum 713 rotates, the movement of the drum device 71 relative to the support rail 771 maintains the position of the control cable 6, which extends from the drum 713 to the holding device 72, at the position of the suspension reference line P. The other configurations are the same as in Embodiment 6.

[0108] In this elevator control cable support device 7, the elastic restoring force of the elastic body 76 can be applied to the drum 713 as a rotational force. Therefore, the same effects as in Embodiment 6 can be obtained. In addition, the adjustment mechanism 77 adjusts the position of the drum device 71 with respect to the suspension reference line P according to the rotation of the drum 713. Therefore, even if the stacking thickness of the control cable 6 relative to the drum 713 changes, the position of the control cable 6 from the drum 713 to the holding device 72 can be maintained with respect to the suspension reference line P. This prevents the control cable 6 in the hoistway 1 from swinging from side to side when the car 2 moves in the vertical direction.

[0109] Embodiment 8. Figure 11 is a top view showing the drum device 71 and adjustment mechanism 77 of the elevator according to Embodiment 8. Figure 12 is a front view showing the drum device 71 and adjustment mechanism 77 as seen along arrow B in Figure 11. The adjustment mechanism 77 includes a pair of support rails 771 and a reduction gear 78. The configuration of the pair of support rails 771 is the same as in Embodiment 7.

[0110] The reduction gear 78 is positioned further from the drum 713 than one of the drum supports 711 in the axial direction of the drum 713. The reduction gear 78 includes a rack gear 781, a first sprocket 782, a second sprocket 783, a chain 784, and a rotary gear 785.

[0111] The rack gear 781 is fixed to the floor surface 201. The rack gear 781 is arranged parallel to each support rail 771. The rack gear 781 has multiple teeth arranged in the longitudinal direction of the rack gear 781.

[0112] The first sprocket 782 is fixed to the drum rotation shaft 712 as the first rotating member. As a result, the first sprocket 782 rotates integrally with the drum rotation shaft 712 and the drum 713 around the axis of the drum 713. The first sprocket 782 is positioned coaxially with the axis of the drum 713. Multiple teeth are provided on the outer circumference of the first sprocket 782, arranged in the circumferential direction.

[0113] The second sprocket 783 is positioned as a second rotating member at a distance from the first sprocket 782. In this embodiment, the second sprocket 783 is positioned below the first sprocket 782. The axis of rotation of the second sprocket 783 is attached to one of the drum supports 711. The axis of the second sprocket 783 is parallel to the axis of the first sprocket 782.

[0114] The first sprocket 782 and the second sprocket 783 are positioned outside the area of ​​the rack gear 773 when the reduction gear 78 is viewed from above. In this embodiment, when the reduction gear 78 is viewed from above, the first sprocket 782 and the second sprocket 783 are positioned further from one of the drum supports 711 than the rack gear 773.

[0115] The outer circumference of the second sprocket 783 is provided with multiple teeth arranged in the circumferential direction of the second sprocket 783. In this embodiment, the outer diameter of the second sprocket 783 is larger than the outer diameter of the first sprocket 782.

[0116] An endless chain 784 is wrapped around the first sprocket 782 and the second sprocket 783 as a transmission element. As a result, the chain 784 engages with the teeth of the first sprocket 782 and the second sprocket 783, respectively. The chain 784 moves in accordance with the rotation of the first sprocket 782. The second sprocket 783 rotates in accordance with the movement of the chain 784.

[0117] The rotating gear 785 is fixed to the rotation axis of the second sprocket 783. As a result, the rotating gear 785 rotates integrally with the second sprocket 783 around its axis. In this embodiment, the outer diameter of the rotating gear 785 is smaller than the outer diameter of the second sprocket 783.

[0118] The rotating gear 785 is positioned between the second sprocket 783 and one of the drum support bases 711. Multiple teeth are provided on the outer circumference of the rotating gear 785, arranged in the circumferential direction. The rotating gear 785 meshes with the rack gear 781. As the rotating gear 785 rotates, it moves along the longitudinal direction of the rack gear 781 while meshing with it.

[0119] Therefore, as the reduction gear 78 operates in response to the rotation of the drum 713 in the direction of winding up the control cable 6, the drum device 71 moves in a direction away from the suspension reference line P, with the axis of the drum 713 moving away from the suspension reference line P. Also, as the reduction gear 78 operates in response to the rotation of the drum 713 in the direction of unwinding the control cable 6, the drum device 71 moves in a direction closer to the suspension reference line P, with the axis of the drum 713 moving towards the suspension reference line P.

[0120] The distance traveled by the drum device 71 when the drum 713 rotates is equal to the change in the stacking thickness of the control cable 6 relative to the drum 713 when the drum 713 rotates, by adjusting the reduction ratio in the reduction gear 78. The reduction ratio in the reduction gear 78 is adjusted by adjusting the outer diameters of the first sprocket 782, the second sprocket 783, and the rotating gear 785, respectively. The other configurations are the same as in Embodiment 7.

[0121] Even with such an adjustment mechanism 77, the position of the drum device 71 relative to the suspension reference line P can be adjusted according to the rotation of the drum 713 by transmitting the rotation of the first sprocket 782 to the second sprocket 783 through the movement of the chain 784.

[0122] Embodiment 9. Figure 13 is a top view showing the drum device 71 and adjustment mechanism 77 of the elevator according to Embodiment 9. Figure 14 is a front view showing the drum device 71 and adjustment mechanism 77 as seen along arrow C in Figure 13. The adjustment mechanism 77 includes a pair of support rails 771 and a reduction gear 79. The configuration of the pair of support rails 771 is the same as in Embodiment 8.

[0123] The reduction gear 79 is positioned further from the drum 713 than one of the drum supports 711 in the axial direction of the drum 713. The reduction gear 79 includes a rack gear 791, a first pulley 792, a second pulley 793, a belt 794, and a rotary gear 795. The configuration of the rack gear 791 is the same as that of the rack gear 781 in Embodiment 8.

[0124] The first pulley 792 is fixed to the drum rotation shaft 712 as the first rotating member. As a result, the first pulley 792 rotates integrally with the drum rotation shaft 712 and the drum 713 around the axis of the drum 713. The first pulley 792 is positioned coaxially with the axis of the drum 713.

[0125] The second pulley 793 is positioned as a second rotating member at a distance from the first pulley 792. In this embodiment, the second pulley 793 is positioned below the first pulley 792. The axis of rotation of the second pulley 793 is attached to one of the drum supports 711. The axis of the second pulley 793 is parallel to the axis of the first pulley 792.

[0126] The first pulley 792 and the second pulley 793 are positioned outside the area of ​​the rack gear 773 when the reduction gear 79 is viewed from above. In this embodiment, when the reduction gear 79 is viewed from above, the first pulley 792 and the second pulley 793 are positioned further from one of the drum supports 711 than the rack gear 773. Also in this embodiment, the outer diameter of the second pulley 793 is larger than the outer diameter of the first pulley 792.

[0127] An endless belt 794 is wrapped around the first pulley 792 and the second pulley 793 as a transmission. The belt 794 moves in accordance with the rotation of the first pulley 792. The second pulley 793 rotates in accordance with the movement of the belt 794.

[0128] The rotating gear 795 is fixed to the rotation axis of the second pulley 793. As a result, the rotating gear 795 rotates integrally with the second pulley 793 around the axis of the second pulley 793. In this embodiment, the outer diameter of the rotating gear 795 is smaller than the outer diameter of the second pulley 793.

[0129] The rotating gear 795 is positioned between the second pulley 793 and one of the drum supports 711. Multiple teeth are provided on the outer circumference of the rotating gear 795, arranged in the circumferential direction. The rotating gear 795 meshes with the rack gear 791. As the rotating gear 795 rotates, it moves in the longitudinal direction of the rack gear 791 while meshing with it.

[0130] Therefore, as the reduction gear 79 operates in response to the rotation of the drum 713 in the direction of winding up the control cable 6, the drum device 71 moves in a direction away from the suspension reference line P, with the axis of the drum 713 moving away from the suspension reference line P. Also, as the reduction gear 79 operates in response to the rotation of the drum 713 in the direction of unwinding the control cable 6, the drum device 71 moves in a direction closer to the suspension reference line P, with the axis of the drum 713 moving towards the suspension reference line P.

[0131] The distance traveled by the drum device 71 when the drum 713 rotates is equal to the change in the stacking thickness of the control cable 6 relative to the drum 713 when the drum 713 rotates, by adjusting the reduction ratio in the reduction gear 79. The reduction ratio in the reduction gear 79 is adjusted by adjusting the outer diameters of the first pulley 792, the second pulley 793, and the rotating gear 795, respectively. The other configurations are the same as in Embodiment 8.

[0132] Even with such an adjustment mechanism 77, the position of the drum device 71 relative to the suspension reference line P can be adjusted according to the rotation of the drum 713 by transmitting the rotation of the first pulley 792 to the second pulley 793 through the movement of the belt 794.

[0133] In embodiments 7 to 9, the drum device 71 is provided as a support-side device above the respective movement ranges of the cage 2 and the counterweight, and the holding device 72 is provided as a cage-side device on the upper part of the cage 2. However, the holding device 72 may be provided as a support-side device above the respective movement ranges of the cage 2 and the counterweight, and the drum device 71 may be provided as a cage-side device on the upper part of the cage 2. Even in this case, the same effects as in embodiment 6 can be obtained. In this case, the adjustment mechanism 77 is provided on the upper part of the cage 2 together with the drum device 71.

[0134] Furthermore, in embodiments 7 to 9, the adjustment mechanism 77 is applied to the control cable support device 7 in embodiment 6. However, the invention is not limited to this, and the adjustment mechanism 77 may also be applied to the control cable support device 7 in embodiments 1 to 5. When the adjustment mechanism 77 is applied to the control cable support device 7 in embodiments 1, 2 and 5, the adjustment mechanism 77 is provided above the respective movement ranges of the cage 2 and the counterweight. When the adjustment mechanism 77 is applied to the control cable support device 7 in embodiments 3 and 4, the adjustment mechanism 77 is provided on the upper part of the cage 2.

[0135] The configurations shown in the embodiments described above are merely examples of the content of this disclosure. The embodiments can be combined with other known technologies. Some parts of the configurations of the embodiments can be omitted or modified without departing from the gist of this disclosure. [Explanation of Symbols]

[0136] 2 cage, 4 hoisting machine, 6 control cable, 21 cage suspension wheel, 42 drive sheave, 71 drum device, 72 holding device, 74 interlocking mechanism (rotational force application part), 75 interlocking mechanism (rotational force application part), 76 elastic body (rotational force application part), 77 adjustment mechanism, 713 drum.

Claims

1. A drum device having a drum around which control cables connected to a cage are wound, A holding device for holding the control cable unwound from the drum, A rotational force application unit that rotates the drum in the direction of winding the control cable when the basket moves upward, Equipped with, Of the drum device and the holding device, one is a cage-side device and the other is a support-side device. The aforementioned cage-side device is provided on the upper part of the cage, The support device is provided above the range of movement of the cage. The drum device is the cage-side device, The rotational force application unit is an interlocking mechanism that mechanically links the drum to the rotation of the cage suspension wheel provided on the cage. The aforementioned cage suspension vehicle rotates in accordance with the movement of the cage. The drum rotates in the direction of winding the control cable by being linked to the rotation of the cage suspension wheel when the cage moves upward via the interlocking mechanism. The drum is an elevator control cable support device that rotates in the direction of unwinding the control cable by being linked to the rotation of the car suspension wheel when the car moves downward via the interlocking mechanism.

2. The system includes an adjustment mechanism that adjusts the position of the drum device relative to a pre-set suspension reference line in the vertical direction according to the rotation of the drum, The holding device is positioned on the suspension reference line, The adjustment mechanism moves the drum device in a direction such that the axis of the drum moves away from the suspension reference line as the drum rotates in the direction of winding the control cable. The control cable support device for an elevator according to claim 1, wherein the adjustment mechanism moves the drum device in a direction in which the axis of the drum approaches the suspension reference line by rotating the drum in the direction in which the control cable is unfurled.

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