JP2023183948A - Elevator and dynamic vibration absorber - Google Patents

Abstract

To provide an elevator and a dynamic vibration absorber that are able to reduce the mass of a car and also reduce vibration generated in the car.SOLUTION: An elevator includes a car, a counterweight 50, and a dynamic vibration absorber 60. The dynamic vibration absorber 60 is detachably attached to a lower-end part 52a of the counterweight 50 in a vertical direction and includes a spring 63. In the dynamic vibration absorber 60, an opening and/or a space 90 for avoiding contact with a shock absorber 40 is defined at a position facing the shock absorber 40.SELECTED DRAWING: Figure 5

Description

The present invention relates to an elevator and a dynamic vibration absorber.

Elevators are provided with a mechanism for reducing vibrations that occur when a car moves up and down. As a technique for reducing vibrations of a car, for example, there is a technique as described in Patent Document 1.

Patent Document 1 discloses that lower car pulleys are provided on the left and right sides of the lower part of the car frame of a car, which is composed of a car room and a car frame, via support members, and a main rope is wound around the lower car pulleys to lower the car. The technology used to drive this is described. Patent Document 1 describes that left and right support members are connected by a connecting member, and a dynamic vibration absorber that is supported by a spring and moves up and down is provided between the connecting member and the car frame.

JP2008-168980A

Furthermore, in recent years, in order to reduce the mass of a car, it is required not to install a heavy dynamic vibration absorber in the car. However, if a dynamic vibration reducer is not installed, there is a problem in that vibrations generated when the car moves up and down cannot be reduced.

The present purpose is to provide an elevator and a dynamic vibration absorber that can reduce the mass of a car and reduce the vibrations generated in the car, taking the above problems into consideration.

In order to solve the above problems and achieve the purpose, an elevator consists of a car that moves up and down in a hoistway provided in a building structure, a counterweight that is suspended from the car via a main rope, and a Equipped with a vibration absorber. The dynamic vibration absorber is removably attached to the lower end of the counterweight in the vertical direction, and has a spring. Further, the dynamic vibration absorber has an opening and/or a space formed at a position facing the shock absorber installed below the counterweight in the vertical direction to avoid contact with the shock absorber.

In addition, the dynamic vibration absorber includes a fixed part that is removably fixed to the lower end in the vertical direction of a counterweight that is suspended on the car via a main rope, a plurality of dynamic vibration absorber weights, and a dynamic vibration absorber weight. and a support plate on which is installed. An opening and/or space is formed in the dynamic vibration absorber weight and support plate at a position facing the shock absorber installed below the counterweight in the vertical direction to avoid contact with the shock absorber. There is.

According to the elevator and dynamic vibration absorber having the above configuration, the mass of the car can be reduced, and the vibrations generated in the car can be reduced.

FIG. 1 is a schematic configuration diagram showing an elevator according to an embodiment. FIG. 1 is a plan view showing an elevator according to an embodiment. It is a front view showing a counterweight of an elevator concerning an example of an embodiment. FIG. 2 is a perspective view showing a state in which a dynamic vibration reducer is attached to a counterweight of an elevator according to an embodiment. FIG. 2 is a front view showing a state in which a dynamic vibration reducer is attached to a counterweight of an elevator according to an embodiment. FIG. 3 is a front view showing a state in which the counterweight of the elevator according to the embodiment has moved to the lowest position. FIG. 2 is a front view showing a dynamic vibration absorber according to an embodiment. FIG. 1 is a perspective view showing a dynamic vibration reducer according to an embodiment. FIG. 2 is a perspective view showing a state in which the dynamic vibration absorber according to the embodiment has moved to the lowest position.

Embodiments of an elevator and a dynamic vibration absorber will be described below with reference to FIGS. 1 to 9. Note that common members in each figure are given the same reference numerals.

[Example of embodiment]
1-1. Configuration Example of Elevator First, the configuration of an elevator according to an embodiment (hereinafter referred to as "this example") will be described with reference to FIGS. 1 and 2.
FIG. 1 is a schematic configuration diagram showing an example of the configuration of an elevator according to the present example. FIG. 2 is a plan view showing the elevator.

As shown in FIG. 1, this is a so-called machine room-less elevator that does not have a machine room above a hoistway formed in a building structure. Further, the example shown in FIG. 1 shows an elevator 100 of a so-called 2:1 roping system.

As shown in FIGS. 1 and 2, the elevator 100 includes a car 4 that ascends and descends within the hoistway 1, a hoist 3, a main rope 13, and is suspended from the car 4 via the main rope 13. It has a counterweight 50, a speed governor 5, a buffer 40, and a control device 30. The buffer 40 is disposed at the bottom of the hoistway 1 in the vertical direction, that is, in a pit of the hoistway 1. The shock absorber 40 is arranged below the car 4 and the counterweight 50, which will be described later, in the vertical direction.

The car 4 is supported by a pair of guide rails 2 , 2 erected within the hoistway 1 so as to be movable up and down in the up and down direction. The guide rail 2 is directed to a rail bracket 20 fixed to the wall surface 1A of the hoistway 1. Further, a lifting pulley (not shown) is provided at the bottom of the car 4 in the vertical direction. A main rope 13 is wound around the lifting pulley.

Further, the car 4 includes an emergency stop device (not shown) and a connection portion that connects to a governor rope 12 wrapped around the speed governor 5. Thereby, the ascending and descending speed of the car 4 is detected by the speed governor 5 via the governor rope 12. Then, when the ascending and descending speed of the car 4 exceeds a predetermined speed, the speed governor 5 activates the emergency stop device. As a result, the car 4 is stopped by the emergency stop device.

The governor 5 includes an upper governor pulley 6, a lower governor pulley 9, a governor weight 10, and a governor rope 12. The upper governor pulley 6 is arranged near the machine beam 3A at the top of the hoistway 1. A governor rope 12 is wound around the upper governor pulley 6.

The lower governor pulley 9 is arranged below the upper governor pulley 6 in the vertical direction, that is, in the pit of the hoistway 1. This lower governor pulley 9 is rotatably supported by a support bracket fixed to the guide rail 2. A governor rope 12 is wound around the lower governor pulley 9. Further, a governor weight 10 is installed on the lower governor pulley 9. A governor weight 10 applies a predetermined tension to a governor rope 12 wound around an upper governor pulley 6 and a lower governor pulley 9.

As shown in FIGS. 1 and 2, the hoist 3 is installed on a machine beam 3A installed at the top of the hoistway 1 in the vertical direction. The hoisting machine 3 is electrically connected to a control device 30. The drive of the hoisting machine 3 is controlled by the control device 30 . A main rope 13 is wound around the sheave of the hoist 3. The main rope 13 is then wound around a pulley for raising the car 4, a weight-side pulley 51 of a counterweight 50 (described later), and a pulley (not shown).

The counterweight 50 is supported by a pair of guide rails 2 , 2 erected within the hoistway 1 so as to be movable up and down in the up and down direction.

1-2. Example of configuration of counterweight Next, the configuration of the counterweight 50 will be described with reference to FIG. 3.
FIG. 3 is a front view showing the counterweight 50. FIG.

As shown in FIG. 3, a buffer 40 is installed at the bottom of the counterweight 50 in the vertical direction. The counterweight 50 includes a weight-side pulley 51, a frame 52, and a plurality of stacked weight members 53.

The frame body 52 is formed into a hollow, substantially rectangular shape. A weight-side pulley 51 is rotatably installed at the top of the frame 52 in the vertical direction. Furthermore, a slider that slides on the guide rail 2 (see FIGS. 1 and 2) is provided on a side surface of the frame 52 in the width direction orthogonal to the up-down direction. Moreover, a plurality of weight members 53 are installed within the frame 52. Note that the number of weight members 53 installed in the frame 52 is configured to be adjustable.

The lower end 52a of the frame 52 in the vertical direction faces the shock absorber 40 installed in the pit. A dynamic vibration absorber 60 is removably attached to the counterweight 50 having such a configuration.

2. Configuration Example of Dynamic Vibration Absorber Next, the configuration of the dynamic vibration absorber 60 will be described with reference to FIGS. 4 to 9.
4 is a perspective view showing a state in which the dynamic vibration absorber 60 is attached to the counterweight 50, and FIG. 5 is a front view showing a state in which the dynamic vibration absorber 60 is attached to the counterweight 50. FIG. 6 is a front view showing a state in which the counterweight 50 to which the dynamic vibration absorber 60 is attached has moved to the lowest position. 7 is a front view showing the dynamic vibration absorber 60, and FIG. 8 is a perspective view showing the dynamic vibration absorber 60. FIG. 9 is a perspective view showing a state in which the dynamic vibration reducer 60 has moved to the lowest position.

As shown in FIGS. 4 and 5, a dynamic vibration reducer 60 is detachably attached to the lower end 52a of the frame 52 of the counterweight 50. As shown in FIGS. 7 and 8, the dynamic vibration absorber 60 includes a support plate 61, a plurality of dynamic vibration absorber weights 62, a spring 63 that is an elastic member, a fixing part 64, and a plurality of fixing rods 65. It has a plurality of stopper rods 66 and a spring support rod 70. Further, the dynamic vibration absorber 60 includes a weight support plate 67 , a first connecting portion 68 , and a second connecting portion 69 .

Four fixed rods 65, four stopper rods 66, and four spring support rods 70 are provided. The fixed rod 65, the stopper rod 66, and the spring support rod 70 are each arranged with their axial directions parallel to the vertical direction. Further, the fixed rod 65 and the spring support rod 70 are arranged at both ends in the width direction, and the stopper rod 66 is arranged closer to the middle part from both ends in the width direction than the fixed rod and the spring support rod 70.

A fixing portion 64 is installed at the upper end of the fixing rod 65 in the vertical direction. A male thread is formed at the upper end of the fixing rod 65, and is inserted into the lower end 52a of the frame 52. Then, by tightening a nut (not shown) onto the upper end of the fixing rod 65, the lower end 52a of the frame 52 is held between the nut and the fixing part 64. Thereby, as shown in FIGS. 4 and 5, the dynamic vibration absorber 60 is fixed to the lower end 52a of the frame 52. Note that the method of fixing the dynamic vibration reducer 60 is not limited to the fixing method described above, and any fixing method that can be detachably fixed may be used, and various other fixing methods can be applied.

Further, a second connecting portion 69 is installed at the lower ends of the fixed rod 65 and the spring support rod 70 in the vertical direction. The second connecting portion 69 is arranged below the support plate 61 in the vertical direction. The second connecting portion 69 connects two fixed rods 65 arranged in the front-rear direction that is perpendicular to the width direction and the up-down direction. Further, the second connecting portion 69 connects two spring support rods 70 arranged in the front-rear direction that is perpendicular to the width direction and the up-down direction.

A first connecting portion 68 is installed at the upper end of the spring support rod 70 in the vertical direction. The first connecting portion 68 connects two spring support rods 70 arranged in the front-rear direction. Furthermore, a fixed rod 65 passes through the first connecting portion 68 in the vertical direction.

A support plate 61 is fixed to an intermediate portion of the fixed rod 65 and the spring support rod 70 in the vertical direction. The support plate 61 is formed of a substantially flat member. The support plate 61 connects a fixed rod 65 and a spring support rod 70 arranged at both ends in the width direction. Further, an opening 61a is formed in the middle portion of the support plate 61 in the width direction.

A spring 63 is attached to the spring support rod 70. The spring 63 is interposed between the second connecting portion 69 representing a spring receiving portion and the support plate 61 . Further, a spring receiving seat 71 is provided between the upper end of the spring 63 and the lower surface of the support plate 61. As the spring 63, a compression coil spring is applied. Note that, as the spring 63, various other spring members such as a leaf spring or a disc spring can be used.

At both ends of the support plate 61 in the width direction, a stopper rod 66 is attached closer to the middle than the fixed rod 65 and the support rod 70 . The stopper rod 66 protrudes downward from the support plate 61 in the vertical direction. A weight support plate 67 is fixed to the lower end of the stopper rod 66 in the vertical direction. Therefore, the weight support plate 67 is arranged below the support plate 61 in the vertical direction.

The weight support plate 67 connects two stopper rods 66 arranged in the front-rear direction. A plurality of dynamic vibration absorber weights 62 are stacked on the weight support plate 67 . Further, the plurality of dynamic vibration absorber weights 62 are also stacked on the top surface of the support plate 61 in the vertical direction. Therefore, the plurality of dynamic vibration absorber weights 62 are divided into a first weight group installed on the weight support plate 67 and a second weight group installed on the support plate 61.

Further, the plurality of dynamic vibration absorber weights 62 are arranged on both sides in the width direction with the opening 61a provided in the support plate 61 being sandwiched therebetween. Therefore, a space 90 (see FIGS. 5 and 7) is formed in the middle portion of the plurality of dynamic vibration absorber weights 62 in the width direction.

When vibration occurs in the car 4, the vibration generated in the car 4 is transmitted to the counterweight 50 via the main rope 13. The vibrations transmitted to the counterweight 50 cause the dynamic vibration reducer 60 to vibrate, thereby canceling out the vibrations generated in the car 4. In this way, according to the elevator 100 of this example, vibrations occurring in the car 4 can be suppressed without increasing the mass of the car 4.

In addition, by adjusting the number of dynamic vibration absorber weights 62 (second weight group) installed on the support plate 61 and the number of dynamic vibration absorber weights 62 (first weight group) installed on the weight support plate 67, The natural frequency of the dynamic vibration reducer 60 can be easily adjusted. Thereby, the natural frequency of the dynamic vibration absorber 60 can be adjusted according to the vibration characteristics of the elevator 100 installed in the building structure, and the vibrations generated in the car 4 can be reduced.

Further, as described above, as shown in FIGS. 5 and 6, the buffer 40 installed on the support base 41 is arranged below the counterweight 50. Therefore, when the counterweight 50 is moved to the lowest position, the dynamic vibration reducer 60 provided at the lower end of the counterweight 50 may come into contact with the shock absorber 40 . On the other hand, in the dynamic vibration absorber 60 of this example, an opening 61a is formed in the support plate 61, and a space 90 is formed in the middle part of the plurality of dynamic vibration absorber weights 62 in the width direction. There is.

As a result, when the counterweight 50 is moved to the lowest position, as shown in FIGS. It is inserted into the portion 61a. Thereby, even if the dynamic vibration absorber 60 is attached to the lower end portion of the counterweight 50, it is possible to prevent the dynamic vibration absorber 60 and the shock absorber 40 from coming into contact with each other.

Further, in this example, an example has been described in which the dynamic vibration reducer weights 62 are arranged on both sides in the width direction with a space 90 left in the middle part in the width direction, but the present invention is not limited to this. For example, like the support plate 61, the dynamic vibration absorber weight 62 may also have an opening in the middle portion in the width direction.

Furthermore, the positions where the space 90 and the opening 61a are provided are not limited to the middle part in the width direction, but are appropriately set depending on the position where the buffer 40 is installed, and are located above and below the buffer 40. The position may be any position that faces the shock absorber 40 in the upper direction.

Furthermore, the dynamic vibration reducer 60 of this example is detachably attached to the lower end of the counterweight 50. Therefore, according to the dynamic vibration reducer 60 of this example, it can be easily retrofitted to the counterweight 50 not only for new elevators but also for renovation work of existing elevators.

Note that when the dynamic vibration absorber 60 is retrofitted to the counterweight 50, the weight balance with the car 4 changes by the weight of the dynamic vibration absorber 60. However, generally, the number of weight members 53 installed in the frame 52 of the counterweight 50 is configured to be adjustable. Therefore, by reducing the number of weight members 53 of the counterweight 50 by the weight of the dynamic vibration absorber 60, the weights of the balance weight 50 and the dynamic vibration absorber 60 can be adjusted to desired weights. As a result, even when the dynamic vibration absorber 60 is retrofitted, changes in the weight balance with the car 4 can be prevented.

The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the gist of the invention as set forth in the claims.

In addition, in the above-mentioned embodiment, an example in which a 2:1 roping type elevator is applied as the elevator is explained, but the invention is not limited to this, and an elevator with a 1:1 roping type or a compen rope can be used. It can also be applied to elevators.

In addition, although words such as "parallel" and "orthogonal" are used in this specification, these do not mean strictly "parallel" and "orthogonal", but include "parallel" and "orthogonal". , and may also be in a "substantially parallel" or "substantially perpendicular" state within the range where the function can be achieved.

1... Hoistway, 1A... Wall surface, 3... Hoisting machine, 4... Car, 5... Speed governor, 13... Main rope, 40... Buffer, 41... Support stand, 51... Weight side pulley, 52... Frame body, 52a...lower end, 53...weight member, 60...dynamic vibration absorber, 61...support plate, 61a...opening, 62...weight for dynamic vibration absorber, 63...spring (elastic member), 64...fixing part, 65... Fixed rod, 66...Stopper rod, 67...Weight support plate, 68...First connection part, 69...Second connection part (spring receiving part), 70...Support rod, 90...Space, 100...Elevator

Claims (7)

A car that moves up and down in a hoistway installed in a building structure,
a counterweight suspended on the car via a main rope;
a dynamic vibration absorber that is removably attached to the lower end of the counterweight in the vertical direction and has a spring;
The dynamic vibration absorber has an opening and/or space formed at a position facing the shock absorber installed below the counterweight in the vertical direction to avoid contact with the shock absorber. . The dynamic vibration reducer is
multiple dynamic vibration absorber weights;
a support plate on which the dynamic vibration absorber weight is installed;
The support plate has the opening formed therein;
The elevator according to claim 1, wherein the dynamic vibration reducer weight has an opening and/or a space formed therein. The dynamic vibration absorber weights are arranged on both sides of the support plate in the width direction, with the opening formed in the support plate sandwiched therebetween,
The elevator according to claim 2, wherein the space is formed between the dynamic vibration absorber weights. The elevator according to claim 1, wherein the dynamic vibration reducer has a fixing part that is detachably fixed to a lower end of the frame of the counterweight. The dynamic vibration absorber includes a weight support plate that is arranged below the support plate in the vertical direction, and on which a predetermined number of the dynamic vibration absorber weights among the plurality of dynamic vibration absorber weights are installed;
The plurality of dynamic vibration absorber weights are
a first group of weights installed on the weight support plate;
The elevator according to claim 2, wherein the elevator is divided into a second group of weights installed on the support plate. The dynamic vibration absorber has a spring receiving part arranged below the support plate in the vertical direction,
The elevator according to claim 5, wherein the spring is interposed between the support plate and the spring receiver. a fixing part that is removably fixed to the lower end in the vertical direction of a counterweight suspended on the car via a main rope;
multiple dynamic vibration absorber weights;
a support plate on which the dynamic vibration absorber weight is installed;
An opening and/or space is formed in the dynamic vibration absorber weight and the support plate at a position facing the buffer installed below the counterweight in the vertical direction to avoid contact with the buffer. Dynamic vibration reducer.

Images