JPH07157240A - Hydraulic elevator device - Google Patents

Abstract

PURPOSE:To suppress generating a rope surging phenomenon of a main rope, which holds a car hoisted, regardless of a lift position of the car. CONSTITUTION:The intermediate part of a main rope 6 is engaged with a hysraulic jack 3, to connect one end of the rope to a fixed body 2 in an elevator shaft 1 and the other end to a car 5. A weight unit 7 for changing a vibration frequency is provided in the main rope 6, and a vibration absorbing means 10, comprising an elastic unit 11 and a weight piece 12 to have a natural frequency near a vibratory exciting frequency, is provided in the weight unit 7. Thus by absorbing vibration of the main rope 6 by the vibration absorbing means 10, a rope surging phenomenon, generated by changing a frequency of vibration due to a lift position of the car 5, is reduced. Accordingly, vibration of the car by the rope surging phenomenon is prevented, to improve comfortableness of the car.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic elevator system in which a main rope to which a car is connected is engaged with a hydraulic jack, and the car moves up and down by the operation of the hydraulic jack.

[0002]

2. Description of the Related Art FIG. 8 is an elevational view conceptually showing a conventional hydraulic elevator system disclosed in Japanese Patent Publication No. 2-34876. In the figure, (1) is a hoistway of a hydraulic elevator, (2) is a fixed body consisting of a jack stand standing on the bottom of the hoistway (1), (3) is standing on the fixed body (2). Hydraulic jack, (4) is a pulley pivotally attached to the upper end of the hydraulic jack (3), (5) is a car that moves up and down a predetermined path of the hoistway (1),
The middle part of (6) is wrapped around the pulley (4), and one end is the fixed body (2).
The other end is the main rope connected to the car (5), (7) is the main rope
With a weight body provided at a location facing the basket (5) of (6),
A fastener (9) consisting of two weight rods (8) arranged opposite to each other via a main rope (6) and a bolt inserted between the weight rod (8) and a nut screwed into the bolt. It is composed by.

The conventional hydraulic elevator system is constructed as described above, and although not shown, hydraulic oil is supplied from the hydraulic power unit to the hydraulic jack (3),
The car (5) is moved up and down through the main rope (6) by the expansion and contraction operation of (3). In addition, the pressure pulsation generated from the hydraulic power unit may cause the hydraulic jack (3) to vibrate up and down, and this vibration may be transmitted to the main rope (6) engaged with the pulley (4) and resonate and expand.

Such a vibration is called a rope surging phenomenon, and the vibration in the car (4) may increase due to this phenomenon, resulting in poor riding comfort of the car (5). In contrast,
The weight body (7) is attached to the main rope (6) at a position facing the car (5) by the weight rods (8) sandwiching the main rope (6) by the fastener (9). Then, the main body is searched by the weight body (7).
Resonance is prevented by changing the peak frequency of (6).

[0005]

In the conventional hydraulic elevator device as described above, since the car (5) moves up and down via the main rope (6) by the hydraulic jack (3), the car (5) moves up and down. The length of the main rope (6) changes, and the main rope (6) changes accordingly.
Vibration frequency changes every moment. And, since the rope surging phenomenon occurs at a certain elevation position of the car (5), when the weight frequency (7) is attached to the main rope (6) to change the peak frequency and prevent resonance, the main rope is The rope surging phenomenon may occur at another lifting position because the frequency of (6) changes. Therefore, there is a problem in that the vibration in the car (4) becomes large and the riding comfort of the car (5) becomes poor.

The present invention has been made in order to solve such a problem, and provides a hydraulic elevator system in which the rope surging phenomenon is suppressed regardless of the raising / lowering position of a car and the riding comfort of the car is not impaired. The purpose is to get.

[0007]

In the hydraulic elevator apparatus according to the invention of claim 1, the intermediate portion is engaged with the hydraulic jack provided on the hoistway, and one end is fixed to the hoistway fixed body. The end is a main rope connected to each car that moves up and down the hoistway, a weight body connected to this main rope to change the frequency of the main rope, and a vibration absorber provided on the weight body that is made up of an elastic body and a weight piece. Means are provided.

In the hydraulic elevator apparatus according to the second aspect of the present invention, the intermediate portion is engaged with the hydraulic jack provided in the hoistway, one end is fixed to the hoistway, and the other end is the hoistway. A main rope connected to each car that moves up and down, a weight body connected to this main rope to change the frequency of the main rope, and a weight body composed of an elastic body and a weight piece with adjustable spring constant. And a vibration absorbing means.

Further, in the hydraulic elevator apparatus according to the third aspect of the present invention, the intermediate portion is engaged with the hydraulic jack provided in the hoistway, one end is fixed to the hoistway and the other end is the hoistway. The main rope connected to the car that moves up and down, the weight body that is connected to this main rope to change the frequency of the main rope, and the vibration absorber provided on the weight body that consists of an elastic body and a weight piece with adjustable mass. Means are provided.

In the hydraulic elevator device according to the fourth aspect of the present invention, the intermediate portion is engaged with the hydraulic jack provided in the hoistway, one end is fixed to the hoistway, and the other end is the hoistway. A main rope connected to each car that moves up and down, a weight body connected to the main rope to change the frequency of the main rope, and a vibration absorbing means provided on the weight body including a damping means, an elastic body and a weight piece. And are provided.

[0011]

In the invention according to claim 1 of the present invention configured as described above, the weight body is provided with the vibration absorbing means for making the natural frequency close to the vibration frequency. As a result, the rope surging phenomenon that occurs when the vibration frequency of the main rope changes depending on the raising / lowering position of the car is reduced by absorbing the vibration of the main rope by the vibration absorbing means.

In the invention according to claim 2 of the present invention configured as described above, the vibration absorbing means for adjusting the spring constant of the elastic body to an appropriate value so that the natural frequency is close to the vibration frequency is provided. It is provided on the weight body. As a result, the rope surging phenomenon that occurs when the vibration frequency of the main rope changes depending on the raising / lowering position of the car is reduced by absorbing the vibration of the main rope by the vibration absorbing means.

Further, in the invention according to claim 3 of the present invention configured as described above, the vibration absorbing means is provided so that the mass of the weight piece is adjusted to an appropriate value and the natural frequency is close to the vibration frequency. It is provided on the body. As a result, the rope surging phenomenon that occurs when the vibration frequency of the main rope changes depending on the raising / lowering position of the car is reduced by absorbing the vibration of the main rope by the vibration absorbing means.

In the invention according to claim 4 of the present invention configured as described above, the weight means is provided with the vibration absorbing means which constitutes the damping means and whose natural frequency is close to the vibration frequency. As a result, the rope surging phenomenon that occurs when the vibration frequency of the main rope changes depending on the raising / lowering position of the car is reduced by absorbing the vibration of the main rope by the vibration absorbing means.

[0015]

【Example】

Example 1. FIG. 1 is a view showing an embodiment of the present invention and is an elevational view conceptually showing a hydraulic elevator system. In the figure, (1) is the hoistway of a hydraulic elevator, and (2) is the hoistway.
Fixed body consisting of jack stand erected on the bottom of (1), (3)
Is a hydraulic jack erected on the fixed body (2), (4) is a pulley pivotally attached to the upper end of the hydraulic jack (3), and (5) is a hoistway (1)
The car (6) that moves up and down along a predetermined path is a main rope whose middle portion is wound around the pulley (4), one end of which is connected to the fixed body (2) and the other end of which is connected to the car (5).

Reference numeral (7) is a weight body provided at a position of the main rope (6) facing the car (5), and two weight rods (8) arranged to face each other through the main rope (6). ) And the weight rod (8) and a fastener (9) consisting of a bolt and a nut screwed into the bolt. (10) is a vibration absorbing means composed of a vibration absorbing system provided in the weight body (7), and an elastic body (11) and an elastic body (11) consisting of a tension coil spring having an upper end connected to the weight body (7) and hanging down. It is composed of a weight piece (12) attached to the lower end of the.

In the hydraulic elevator device constructed as described above, although not shown, pressure oil is supplied to the hydraulic jack (3) from the hydraulic power unit, and the hydraulic jack (3) operates to operate the main rope (6). ), The car (5) is moved up and down. The pressure pulsation generated from the hydraulic power unit causes the hydraulic jack (3) to vibrate up and down, and this vibration is transmitted to the main rope (6) engaged with the pulley (4) and resonates and expands. I have something to do. As a result, the vibration in the car (4) becomes large and the riding comfort of the car (5) deteriorates.

On the other hand, at the location of the main rope (6) facing the car (5), the weight rods (8) are attached to each other by the fasteners (9).
The weight body (7) is attached by pinching (6). Then, the weight body (7) changes the peak frequency of the main rope (6) to prevent resonance. And, as a countermeasure against rope surging, the weight body (7) is attached to the main rope (6), the frequency is changed, and the rope surging phenomenon may occur due to the change in the ascending / descending position of the car (5).

However, even in such a case, the weight body (7)
Vibration of the main rope (6) is absorbed by the vibration absorbing means (10) attached to the car, and it is possible to prevent vibration of the car (5) due to the rope surging phenomenon and maintain a good ride comfort of the car (5). be able to. The natural frequency of the vibration absorbing means (10) is determined by the spring constant of the elastic body (11) and the mass of the weight piece (12), but the natural frequency of the vibration absorbing means (10) causes rope surging. It is set to a value close to the excitation frequency.

Example 2. 2 and 3 are views showing another embodiment of the present invention, FIG. 2 is an enlarged view of a portion II of FIG. 1, and FIG. 3 is a plan view of FIG. Three
Other than that is configured similarly to FIG. In the figure,
The same reference numerals denote corresponding parts, and (10) is a vibration absorbing means, which is composed of leaf springs which are respectively mounted on the weight rods (8) and project horizontally, and which are provided with a slot (13) along the longitudinal direction. The adjustment fastener (14) is composed of a bolt that is inserted into the body (11) and the weight piece (12) and is slidably inserted into the slot (13), and a nut that is screwed into the bolt.

Also in the hydraulic elevator apparatus constructed as described above, the weight body (7) and the vibration absorbing means (1) are attached to the main rope (6).
0) is provided. Therefore, although detailed description is omitted, it is apparent that the same effects as those of the embodiment of FIG. 1 can be obtained in the embodiments of FIGS. 2 and 3. Also, the slot (1
Since the weight piece (12) can be moved along the length of the elastic body (11) by 3) and fastened to the position shown by the broken line in FIGS. 2 and 3, for example, the spring constant of the elastic body (11) can be changed. It can be easily adjusted to the required value.

Therefore, the natural frequency of the vibration absorbing means (10) can be easily set to an appropriate value, and the vibration absorbing means (1
0) can be formed. As a result, vibration of the car (5) due to the rope surging phenomenon can be prevented more effectively, and good riding comfort of the car (5) can be maintained.

Example 3. 4 and 5 are also diagrams showing another embodiment of the present invention, FIG. 4 is an enlarged view of the II portion of FIG. 1, and FIG. 5 is a plan view of FIG. 5
Other than that is configured similarly to FIG. In the figure,
The same reference numerals denote corresponding parts, and (10) is a vibration absorbing means, which is an elastic body (11) and a plurality of weight plates (15) each of which is attached to the weight rod (8) and which is a plate spring horizontally projected. Are inserted in the weight pieces (12) arranged in a stacked state and the elastic body (1
The adjusting fastener (14) is composed of a bolt inserted into 1) and a nut screwed into the bolt.

Also in the hydraulic elevator apparatus constructed as described above, the weight body (7) and the vibration absorbing means (1) are attached to the main rope (6).
0) is provided. Therefore, although detailed description is omitted, it is apparent that the same effects as those of the embodiment of FIG. 1 can be obtained in the embodiments of FIGS. 2 and 3. Moreover, since the mass of the weight piece (12) can be changed by appropriately increasing or decreasing the number of the weight plates (15), the natural frequency of the vibration absorbing means (10) can be easily set to an appropriate value. It is possible to form the optimum vibration absorbing means (10) for the vibration frequency that is a factor of rope surging. As a result, vibration of the car (5) due to the rope surging phenomenon can be prevented more effectively, and good riding comfort of the car (5) can be maintained.

Example 4. 6 and 7 are views showing another embodiment of the present invention, FIG. 6 is an enlarged view of the II portion of FIG. 1, and FIG. 7 is a plan view of FIG. 7
Other than that is configured similarly to FIG. In the figure,
(16) is a fixture that is attached to the weight rod (8) and is horizontally projected, and (10) is a fixture.
(16) is a vibration-absorbing device arranged upright, and the cylinder (1
7), the lid (18) of the cylinder (17), the high viscosity oil (19) such as silicone oil contained in the cylinder (17), the elastic body (11) and the high viscosity oil supported by the elastic body (11). It is composed of a weight body (12) suspended in (19).

(20) consists of a high-viscosity oil (19), an oil damper formed mainly of a weight body (12) suspended in the high-viscosity oil (19) through an elastic body (11), and a damping It is a damping means that forms a system. Reference numeral (21) is a fastener which is composed of a bolt inserted into the base plate of the cylinder (17) and a nut screwed into the bolt, and which fastens the vibration absorbing means (10) to the fixture (16).

Also in the hydraulic elevator apparatus constructed as described above, the weight body (7) and the vibration absorbing means (1) are attached to the main rope (6).
0) is provided. Therefore, although detailed description is omitted, it is apparent that the same effects as those of the embodiment of FIG. 1 can be obtained in the embodiments of FIGS. 2 and 3. Further, the weight body (12) of the damping means (20) configured in the vibration absorbing means (10) generates viscous damping by vibrating vertically in the high viscosity oil (19) via the elastic body (11). To do. As a result, it is possible to obtain a vibration absorbing action over a wider range of vibration frequencies, and it is possible to form the vibration absorbing means (10) that is optimum for the vibration frequency that is a factor of rope surging. Therefore, the vibration of the car (5) due to the rope surging phenomenon can be prevented more effectively, and a good riding comfort of the car (5) can be maintained.

[0028]

As described above, according to the first aspect of the present invention, the intermediate portion is engaged with the hydraulic jack provided on the hoistway, one end of which is the fixed body of the hoistway, and the other end of which is the hoistway. A main rope connected to each of the ascending and descending cars, a weight body attached to the main rope to change the frequency of the main rope, and an elastic body and a weight piece attached to the weight body. And a vibration absorbing means that is close to As a result, the rope surging phenomenon that occurs when the vibration frequency of the main rope changes depending on the raising / lowering position of the car is reduced by absorbing the vibration of the main rope by the vibration absorbing means. Therefore, it is possible to prevent the vibration of the car due to the rope surging phenomenon, and it is possible to obtain a good ride comfort of the car.

Further, as described above, in the invention according to claim 2 of the present invention, the intermediate portion is engaged with the hydraulic jack provided in the hoistway, one end of which is the fixed body of the hoistway, and the other end of which is the hoistway. A main rope connected to each of the ascending and descending cages, a weight body attached to the main rope to change the frequency of the main rope, and an elastic body with adjustable spring constant and a weight piece. And a vibration absorbing means whose number is close to the vibration frequency.

As a result, the rope surging phenomenon which occurs when the vibration frequency of the main rope changes depending on the ascending / descending position of the car is reduced by absorbing the vibration of the main rope by the vibration absorbing means. Therefore, it is possible to prevent the vibration of the car due to the rope surging phenomenon, and it is possible to obtain a good ride comfort of the car. Further, the natural frequency of the vibration absorbing means (10) can be easily set to an appropriate value by adjusting the spring constant of the elastic body, and the optimum vibration absorbing means for the vibration frequency that is a factor of rope surging. Can be formed. As a result, the vibration of the car due to the rope surging phenomenon can be more effectively prevented, and a good ride comfort of the car can be obtained.

Further, as described above, in the invention according to claim 3 of the present invention, the intermediate portion is engaged with the hydraulic jack provided in the hoistway, one end of which is the fixed body of the hoistway, and the other end of which is the hoistway. A main rope connected to each car that moves up and down, a weight body that is attached to the main rope to change the frequency of the main rope, and an elastic body and a weight piece with adjustable mass attached to the weight body. And a vibration absorbing means whose number is close to the vibration frequency.

As a result, the rope surging phenomenon which occurs when the vibration frequency of the main rope changes depending on the raising / lowering position of the car is reduced by absorbing the vibration of the main rope by the vibration absorbing means. Therefore, it is possible to prevent the vibration of the car due to the rope surging phenomenon, and it is possible to obtain a good ride comfort of the car. Also, by adjusting the mass of the weight piece, the natural frequency of the vibration absorbing means (10) can be easily set to an appropriate value, and the optimum vibration absorbing means for the vibration frequency that is a factor of rope surging can be obtained. Can be formed. As a result, the vibration of the car due to the rope surging phenomenon can be more effectively prevented, and a good ride comfort of the car can be obtained.

As described above, in the invention according to claim 4 of the present invention, the intermediate portion is engaged with the hydraulic jack provided in the hoistway, one end of which is the fixed body of the hoistway, and the other end of which is the hoistway. A main rope connected to each of the ascending and descending cages, a weight body attached to the main rope to change the frequency of the main rope, and a damping means configured to be an elastic body and a weight piece. The vibration absorbing means is provided so that the frequency is close to the vibration frequency.

As a result, the rope surging phenomenon which occurs when the vibration frequency of the main rope changes depending on the raising / lowering position of the car is reduced by absorbing the vibration of the main rope by the vibration absorbing means. Therefore, it is possible to prevent the vibration of the car due to the rope surging phenomenon, and it is possible to obtain a good ride comfort of the car. In addition, since the damping means is provided side by side with the vibration absorbing means, it is possible to obtain a vibration absorbing effect over a wider range of vibration frequencies, and to provide an optimum vibration absorbing means for the vibration frequency that is a factor of rope surging. Can be formed. As a result, it is possible to more effectively prevent the cage vibration due to the rope surging phenomenon,
There is an effect of obtaining a good car riding comfort.

[Brief description of drawings]

FIG. 1 is a view showing a first embodiment of the present invention, and is a conceptual elevational view of a hydraulic elevator device.

FIG. 2 is a view showing a second embodiment of the present invention and is an equivalent view in which a portion II of FIG. 1 is enlarged.

FIG. 3 is a plan view of FIG.

FIG. 4 is a view showing a third embodiment of the present invention and is an enlarged view of a portion II of FIG. 1.

5 is a plan view of FIG.

FIG. 6 is a view showing a fourth embodiment of the present invention and is an equivalent view in which a portion II of FIG. 1 is enlarged.

FIG. 7 is a plan view of FIG.

FIG. 8 is a conceptual elevational view of a hydraulic elevator device showing a conventional hydraulic elevator device.

[Explanation of symbols]

 1 hoistway 2 fixed body 3 hydraulic jack 5 car 6 main rope 7 weight body 10 vibration absorbing means 11 elastic body 12 weight piece 20 damping means

Claims (4)

[Claims] 1. A main rope having an intermediate portion engaged with a hydraulic jack provided in the hoistway, one end of which is connected to a fixed body of the hoistway and the other end of which is connected to a car that hoists up and down the hoistway. A hydraulic elevator device comprising: a weight body connected to a rope to change the frequency of the main rope; and a vibration absorbing means formed of an elastic body and a weight piece provided on the weight body. 2. A main rope having an intermediate portion engaged with a hydraulic jack provided in the hoistway, one end of which is connected to a fixed body of the hoistway and the other end of which is connected to a car that hoists up and down the hoistway, and a main rope. A hydraulic elevator device comprising: a weight body connected to a rope to change the frequency of the main rope; and a vibration absorbing means provided on the weight body, the elastic body having a spring constant adjustable and a weight piece. 3. A main rope, the middle portion of which is engaged with a hydraulic jack provided on the hoistway, one end of which is connected to a fixed body of the hoistway and the other end of which is connected to a car that hoists up and down the hoistway, respectively. A hydraulic elevator apparatus comprising: a weight body connected to a rope to change the frequency of the main rope; and a vibration absorbing means provided on the weight body, the weight body comprising an elastic body and a weight-adjustable weight piece. 4. A main rope connected to an intermediate part of a hydraulic jack provided on the hoistway, one end of which is connected to a fixed body of the hoistway and the other end of which is connected to a car that hoists up and down the hoistway, and a main rope. A hydraulic elevator apparatus comprising: a weight body connected to a rope to change the frequency of the main rope; and a vibration absorbing means provided on the weight body, the damping means being configured by an elastic body and a weight piece.