CN1308215C - Elevator - Google Patents

Abstract

The present invention relates to an elevator device. A balance cantilever mechanism provided with a horizontally extending swinging shaft and a balance cantilever body which can swing around the swinging shaft as a center is carried on a cage, and the balance cantilever body is provided with a first rope connecting part and a second rope connecting part, wherein the second rope connecting part is positioned at the opposite side of the first rope connecting part oppositely to the swinging shaft. A main rope body is provided with a first main rope coiled and suspended on a first driving pulley and a second main rope coiled and suspended on a second driving pulley, wherein the first main rope has a first cage side end part connected with the first rope connecting part and a first counterweight side end part connected with a counterweight, and the second main rope has a second cage side end part connected with the second rope connecting part and a second counterweight side end part connected with the counterweight.

Description

Elevator device

technical field

The present invention relates to an elevator apparatus for raising and lowering one car by using the driving forces of first and second driving devices.

Background technique

Fig. 11 is a configuration diagram showing, for example, a conventional elevator apparatus shown in EP1006071A1. In the figure, a mechanical room 2 is provided on the upper part of the lifting passage 1 . In the machine room 2, first and second driving devices 3, 4 are provided. The first drive device 3 has a first drive device body 3A including a motor and a brake, and a first drive pulley 5 that is rotated by the first drive device body 3A. The second drive device 4 includes: a second drive device body 4A including a motor and a brake; and a second drive pulley 6 that is rotated by the second drive device body 4A.

A plurality of main cables 7 (only one is shown in the figure) are wound around the first drive pulley 5 and the second drive pulley 6 . The main cable 7 has a first end portion 7a and a second end portion 7b. A first counterweight 8 is suspended from the first end portion 7a. A second counterweight 9 is suspended from the second end portion 7b. The first and second end portions 7a, 7b are connected to the first and second counterweights 8, 9 via rope end springs 15, 16.

A car 10 is suspended in the middle of the main rope 7 . A suspension beam 11 is horizontally fixed to the lower portion of the car 10 . Hanging wheels 12 and 13 on which the main rope 7 is wound are mounted on the hanging wheel beam 11 . Also, the main rope 7 is fixed to the central portion of the suspension beam 11 by the rope fixing portion 14 .

In such an elevator apparatus, the car 10 and the counterweights 8 and 9 are raised and lowered in the hoistway 1 by rotating the first and second drive pulleys 5 and 6 in opposite directions. At this time, since the main rope 7 is fixed to the suspension beam 11 by the rope fixing portion 14 , the main rope 7 does not move relative to the car 10 .

Therefore, in the conventional elevator device, since the main rope 7 is fixed on the suspension beam 11, the difference between the first and second driving devices 3 and 4 due to manufacturing errors and long-term deformation (wear, etc.) , And the first and second drive pulleys 5,6 in the case of a difference in rotational speed and pulley diameter, the inclination of the car 10 may occur, the bad situation that the running performance is reduced.

Also, the main rope 7 may be connected to the suspension beam 11 to allow some displacement. In this case, the main rope 7 moves slightly relative to the car 10, and the car 10 may tilt.

Contents of the invention

The present invention is made to solve the above problems, and an object of the present invention is to obtain an elevator apparatus capable of preventing the car from inclining due to the difference between the first and second driving devices and preventing the decrease in running performance.

According to one aspect of the present invention, an elevator device is provided, which has: a first driving device provided with a first driving pulley; a second driving device provided with a second driving pulley; The main cable body on the top; the car and the counterweight are suspended in the lifting passage by the main cable body, and are lifted and lowered in the lifting passage by the driving force of the first and second drive devices. The car is equipped with a horizontal The balance cantilever mechanism of an extended swing shaft and a balance cantilever body that can swing around the swing shaft. The balance cantilever body has a first rope connection part and a second rope connection part opposite to the swing shaft. In the rope connection part, the main rope body has a first main rope wound on the first driving pulley and a second main rope wound on the second driving pulley, and the first main rope has a second main rope connected to the first rope connecting part. 1. The car-side end and the first counterweight-side end connected to the counterweight. The second main rope has the second car-side end connected to the second rope connection part and the second counterweight connected to the counterweight. Side end, wherein, between the first and second rope connection parts and the first and second car side end, absorbing springs are arranged respectively, and the absorbing spring is relatively inclining due to the inclination of the balance cantilever body. The resulting change in the connection angle between the first and second rope connection parts and the first and second car-side end parts is absorbed.

Preferably, the elevator device also has a swing sensor for detecting the swing of the balance cantilever body.

Description of drawings

Fig. 1 is a developed structural view showing an elevator apparatus according to Embodiment 1 of the present invention.

Fig. 2 is a plan view showing the elevator apparatus of Fig. 1 .

Fig. 3 is a developed structural view showing an elevator apparatus according to Embodiment 2 of the present invention.

Fig. 4 is a plan view showing an elevator apparatus according to Embodiment 3 of the present invention.

Fig. 5 is a cross-sectional view taken along line V-V in Fig. 4 .

Fig. 6 is a front view showing main parts of an elevator apparatus according to Embodiment 4 of the present invention.

Fig. 7 is a sectional view taken along line VII-VII of Fig. 6 .

Fig. 8 is a block diagram showing a control system of the elevator apparatus of Fig. 6 .

Fig. 9 is a flowchart showing the operation of the control device in Fig. 8 .

Fig. 10 is a front view showing main parts of an elevator apparatus according to Embodiment 5 of the present invention.

Fig. 11 is a configuration diagram showing an example of a conventional elevator apparatus.

Detailed ways

Hereinafter, best embodiments of the present invention will be described with reference to the accompanying drawings.

[Embodiment 1]

Fig. 1 is a developed structural view showing an elevator apparatus according to Embodiment 1 of the present invention, and Fig. 2 is a plan view showing the elevator apparatus in Fig. 1 . Moreover, FIG. 2 shows the planar arrangement of the main equipment after omitting the floor of the machine room.

In the figure, a mechanical room 2 is provided on the upper part of the lifting passage 1 . In the machine room 2, first and second driving devices 3, 4 are provided. The first drive device 3 has a first drive device body 3A including a motor and a brake, and a first drive pulley 5 that is rotated by the first drive device body 3A. The second drive device 4 includes: a second drive device body 4A including a motor and a brake; and a second drive pulley 6 that is rotated by the second drive device body 4A.

The 1st and the 2nd drive unit 3,4 are configured such that the 1st drive unit body 3A is opposite to the 2nd drive unit body 4A, that is, the outsides of the 1st and the 2nd drive pulleys 5,6 are opposed. Also, the first and second driving pulleys 5, 6 are arranged such that their rotation shafts extend horizontally along the front width direction of the hoistway 1 (the left-right direction in FIG. 2 ). However, since FIG. 1 is a developed view, the directions of the driving devices 3 and 4 in FIG. 1 are different from those in FIG. 2 .

On the first drive pulley 5 and the second drive pulley 6, a main cable body 20, which is a main cable assembly, is wound around. The main cable body 20 has a plurality of first main cables 21 wound around the first driving pulley 5 and a plurality of second main cables 22 wound around the second driving pulley 6 .

Each first main cable 21 has a first car-side end portion 21a and a first counterweight-side end portion 21b. Each second main cable 22 has a second car-side end portion 22a and a second counterweight-side end portion 22b. The first counterweight 8 is suspended from the first counterweight-side end portion 21b. The second counterweight 9 is suspended from the second counterweight side end portion 22b. The first and second counterweight-side end portions 21 b and 22 b are connected to the first and second counterweights 8 and 9 via cable end springs 15 and 16 .

The car 10 is suspended from the first and second car-side end portions 21a, 22a. A balance suspension mechanism 23 is mounted on the lower portion of the car 10 . The balance cantilever mechanism 23 has: a swing shaft 24 extending horizontally along the depth direction of the car 10 (the up-and-down direction in FIG. 2 ); and a balance cantilever body 25 that can swing around the swing shaft 24 .

The balance cantilever body 25 has: a first rope connecting portion 25a positioned at one end in the longitudinal direction; relative to the swing shaft 24, it is connected to the second rope on the opposite side of the first rope connecting portion 25a, that is, positioned at the other end in the longitudinal direction. Section 25b. The first car-side end portion 21a is connected to the first rope connection portion 25a. The second car-side end portion 22a is connected to the second rope connection portion 25b.

Absorbing springs 26, 27 are disposed respectively between the first rope connecting portion 25a and the first car-side end portion 21a, and between the second rope connecting portion 25b and the second car-side end portion 22a. Changes in connection angles between the first and second rope connection parts 25a, 25b and the first and second car-side end parts 21a, 22a caused by the inclination of the balance boom body 25 are absorbed.

In the lifting passage 1, there are: a pair of car guide rails 28 for guiding the lifting of the car 10; a pair of first counterweight guide rails 29 for guiding the lifting of the first counterweight 8 and a pair of second counterweights 9 A pair of second counterweight guide rails 30 for guiding the lifting. Also, the first and second counterweights 8 and 9 are arranged on the left and right sides of the car 10 with the car 10 interposed therebetween.

In such an elevator device, since the car 10 is suspended by the balance cantilever mechanism 23, the inclination of the car 10 due to the difference between the first and second driving devices 3, 4 can be prevented, and the movement of the car 10 can be prevented. Reduced performance. That is, when there is a difference in rotational speed and pulley diameter between the first and second drive pulleys 5, 6, the difference can be absorbed by only tilting the balance boom body 25 without tilting the car 10.

Moreover, compared with the case of using one drive device, the use of two drive devices 3, 4 can prevent the enlargement of each drive device 3, 4, and it is possible to make the drive from an elevator device with a small car capacity to an elevator with a large car capacity. The driver of the device is generalized.

Again, since absorbing springs 26, 27 are disposed respectively between the 1st and the 2nd rope connecting portions 25a, 25b and the 1st and 2nd car side end portions 21a, 22a, it can absorb the inclination of the cantilever body 25 due to the balance. The change of the connection angle between the first and second rope connecting parts 25a, 25b and the first and second car side ends 21a, 22a caused by the first and second car side ends 21a, 22a can And the balance cantilever body 25 does not apply excessive force, suppressing the generation of stress.

[Embodiment 2]

Next, Fig. 3 is a developed configuration diagram showing an elevator apparatus according to Embodiment 2 of the present invention. In this example, the same balance suspension mechanism 23 as in the first embodiment is mounted on the upper portion of the car 10 . Other structures are the same as those of the first embodiment.

In this way, even when the balance cantilever mechanism 23 is mounted on the upper part of the car 10, it is possible to prevent the inclination of the car 10 due to the difference between the first and second driving devices 3 and 4, and to prevent deterioration of the running performance. reduce.

[Embodiment 3]

Next, Fig. 4 is a plan view showing an elevator apparatus according to Embodiment 3 of the present invention, and Fig. 5 is a cross-sectional view taken along line V-V in Fig. 4 . In addition, in FIG. 4, the planar arrangement of the main equipment which omitted the floor of a machine room is shown.

In the figure, the first and second driving devices 3, 4 are arranged such that the rotation shafts of the first and second driving pulleys 5, 6 are inclined with respect to the front width direction of the hoistway 1 and extend horizontally.

On the first and second car-side end portions 21a, 22a of the first and second main ropes 21, 22, the car 10 is suspended by the balance suspension mechanism 23 as in the first embodiment. On the first and second counterweight side ends 21b, 22b of the first and second main cables 21, 22, a counterweight 31 is suspended by the same balance suspension mechanism 23 as that on the car 10 side.

In Embodiment 1, two counterweights 8 and 9 are used, but in Embodiment 3 only one counterweight 31 is used. Also, the balance cantilever mechanism 23 on the counterweight 31 side is slightly different from the balance cantilever mechanism 23 on the car 10 side in terms of size, etc., but since it has the same function, the same symbols are used for simplicity in the figure.

The balance suspension mechanism 23 on the counterweight 31 side is mounted on the upper part of the counterweight 31 . The first counterweight-side end portion 21b of the first main cable 21 is connected to the first rope connection portion 25a of the balance boom main body 25 on the counterweight 31 side through an absorption spring 33 . The second weight-side end portion 22b of the second main cable 22 is connected to the second rope connection portion 25b of the balance boom main body 25 on the side of the weight 31 via an absorption spring 34 .

In the hoistway 1, a pair of counterweight guide rails 32 for guiding the up and down of the counterweight 31 is provided. Also, the counterweight 31 is arranged behind the car 10 . In the machine room 2 (see FIG. 4 ), a first deflection sheave 35 for guiding the first main rope 21 to the counterweight 31 and a second deflection sheave 36 for guiding the second main rope 22 to the counterweight 31 are disposed. Other structures are the same as those of the first embodiment.

With such an elevator apparatus, one counterweight 31 can be provided, and accordingly, one set of counterweight guide rails 32 can be used, and the overall structure can be simplified. Again, since the counterweight 31 is suspended by the balance suspension mechanism 23, it is possible to prevent the inclination of the counterweight 31 due to the difference between the first and second driving devices 3 and 4, and to make the counterweight 31 go up and down smoothly.

In addition, the balance suspension mechanism 23 on the side of the counterweight 31 may be mounted on the lower part of the counterweight 31 .

[Embodiment 4]

Next, Fig. 6 is a front view showing a main part of an elevator apparatus according to Embodiment 4 of the present invention, and Fig. 7 is a sectional view taken along line VII-VII of Fig. 6 . In the figure, the swing shaft 24 swings integrally with the balance cantilever body 25 . A swing sensor 41 that detects the swing of the balance arm main body 25 by detecting the rotation of the swing shaft 24 is engaged with the swing shaft 24 . Between the car 10 and the balance boom main body 25, first and second buffers 42, 43 are disposed.

Fig. 8 is a block diagram showing a control system of the elevator apparatus of Fig. 6 . In the control device 44, be provided with: the drive control part 45 that is connected with the 1st and the 2nd drive device 3,4; The inclination angle detection part 46 that is connected with the swing sensor 41; and an inclination correction unit 48 connected to the drive control unit 45 and the inclination determination unit 47 .

The drive control unit 45 individually controls the drive of the first and second drive devices 3 and 4 . The inclination angle detection unit 46 detects the inclination angle of the balance arm main body 25 based on the signal from the swing sensor 41 . The inclination determination part 47 judges whether the inclination angle of the balance cantilever body 25 is below a preset value, and calculates the rate of change of the inclination angle of the balance cantilever body 25, and determines whether the rate of change is below a preset value. Make a judgment. The inclination correction unit 48 calculates a signal for canceling the inclination of the balance arm main body 25 and outputs the signal to the drive control unit 45 .

Other structures are the same as those of the first embodiment.

Next, the principle of operation will be described. The function of the balance suspension mechanism 23 is the same as that of the first embodiment. FIG. 9 is a flowchart showing the operation of the control device 44 in FIG. 8 . When the car 10 stops at the hall floor, when a call is received and an operation command is input to the control device 44, whether the tilt angle of the balance boom body 25 is determined by the tilt determination unit 47 below the set value (step S1). If the inclination angle is below the set value (horizontal or substantially horizontal), an operation permission command is output from the inclination determination unit 47 to the drive control unit 45 (step S2), and the first and second drive devices 3, 4 are driven.

When the inclination angle exceeds the set value, a signal for canceling the inclination of the balance cantilever main body 25 is calculated by the inclination correction unit 48 and output to the drive control unit 45 . Thereby, at least one of the first and second driving devices 3 and 4 can be driven to a state in which the inclination of the balance arm main body 25 is canceled (step S3). Then, it is judged by the inclination determination part 47 whether the inclination angle is below a set value, and if it is below a set value, an operation permission command is output (step S2).

In the event that the inclination removal control is performed, but the inclination angle exceeds the set value, it is judged that there is some kind of abnormality in the control system or the drive system, and the start of the first and second drive devices 3 and 4 is suspended, and a report is sent to the elevator. The management office outputs an abnormality detection signal (step S5).

When the operation permission command was output and the car 10 actually moved, the rate of change of the inclination angle of the balance cantilever body 25 was calculated by the inclination determination section 47, and whether the rate of change was determined below the set value (step S6) . When the rate of change of the inclination angle exceeds the setting value, that is, after the balance cantilever body 25 inclines sharply, it is judged that it is difficult to remove the inclination, and the car 10 decelerates and stops, or stops at the nearest floor (step S7). Furthermore, an abnormality detection signal is output to the management room of an elevator, etc.

Moreover, if there is no abnormality in the rate of change of the inclination angle, it is determined whether the magnitude of the inclination angle is equal to or less than a set value (step S8). The set value used as the judgment standard at this time may be the same as or different from the set value in the stopped state of the car 10 . After the determination of the angle of inclination, whether the operation of the car 10 is confirmed (step S9), if the car 10 is in operation, the speed of change and the size of the angle of inclination are determined continuously or periodically.

When the inclination angle exceeds the set value during the operation of the car 10, the signal for canceling the inclination of the balance cantilever body 25 is calculated by the inclination correction unit 48 and output to the drive control unit 45. As a result, the first and second driving devices 3 and 4 are driven to a state in which the inclination of the balance arm main body 25 is canceled (step S10 ).

In such an elevator apparatus, since the swing sensor 41 for detecting the swing of the balance arm body 25 is used, it is easy to monitor whether there is any abnormality in the inclination angle of the balance arm body 25, and the reliability can be improved.

Also, since the first and second buffers 42, 43 are disposed between the car 10 and the balance boom body 25, unstable movement of the balance boom body 25 can be prevented, and the output of the swing sensor 41 can be stabilized.

Again, under the stop state of car 10, because at least any one of the 1st and the 2nd driving device 3,4 can be controlled to cancel the inclination state of balance cantilever main body 25 according to the information from swing sensor 41, so in the lifting At the beginning, the balance cantilever body 25 can be kept in a neutral (horizontal) state, and the running performance of the car 10 can be further improved.

Again, in the operation of the car 10, since the first and second driving devices 3 and 4 can be controlled to cancel the inclination of the balance cantilever body 25 according to the information from the swing sensor 41, in the operation of the car 10 The balance cantilever main body 25 can also be maintained in a neutral (horizontal) state, and the running performance of the car 10 can be further improved.

Moreover, in the operation of the car 10, since the speed of change of the inclination angle of the balance cantilever body 25 can be detected according to the information from the swing sensor 41, and whether the speed of change is below the set value is judged, it can be performed earlier. Detect abnormalities of the drive system and control system accurately.

Also, when the rate of change of the inclination angle of the balance cantilever body 25 exceeds the set value, the car 10 is decelerated to a stop or stopped on the nearest floor, and an abnormality detection signal is generated and output, so the processing when an abnormality occurs can be carried out as early as possible. .

[Embodiment 5]

Next, Fig. 10 is a front view showing a main part of an elevator apparatus according to Embodiment 5 of the present invention. Among the figure, between the car 10 and the balance cantilever body 25, two swing sensors 49a, 49b are configured, which detect the swing of the balance cantilever body 25 by detecting the distance between the car 10 and the balance cantilever body 25. to test. The swing sensors 49 a , 49 b are arranged at equal intervals from the swing axis 24 . Other structures are the same as those of the fourth embodiment.

In this way, even if the swing sensors 49a, 49b of the type for detecting the distance between the car 10 and the balance boom body 25 are used, it is easy to monitor whether the inclination angle of the balance boom body 25 is abnormal, and reliability can be improved.

Also, in Embodiment 4, the inclination angle of the balance cantilever body 25 is judged just before the car 10 starts to run, but it can be judged just after landing, or it can continue to be judged during the stop.

Again, in Embodiment 4, the information from the swing sensor 41 is utilized to determine the rate of change of the inclination angle of the balance cantilever body 25, and the car 10 can also be moved after reaching the preset limit value of the swing angle. Stop at the nearest floor or decelerate to stop. Also, a limit switch that is operated when the balance cantilever body 25 is tilted to a limit value, which is separate from the swing sensor, can be additionally provided.

Also, in Embodiment 5, the inclination angle of the balance cantilever main body 25 obtained from the distance between the car 10 and the balance cantilever main body 25 is determined, but it is also possible to directly determine the distance without obtaining the inclination angle. determination.

Also, in Embodiments 1 to 5, the elevator apparatus in which the first and second driving devices 3 and 4 are installed in the machine room 2 is shown, but the present invention is also applicable to the arrangement of the first and second driving devices in Elevator without machine room in hoistway. In the elevator without a machine room, the first and second driving devices can be supported by a support beam fixed to the upper part of the hoistway or a support beam fixed to the upper part of the guide rail.

Claims (7)

1. An elevator device, characterized in that it has: 1st drive means with 1st drive pulley; 2nd drive unit with 2nd drive pulley; the main cable body coiled on the first and second drive pulleys; and the car and the counterweight that are suspended in the hoisting passage by the main cable body and are lifted and lowered in the hoisting passage by the driving force of the first and second drive devices, A balance cantilever mechanism having a horizontally extending swing shaft and a balance cantilever body swingable around the swing shaft is mounted on the car, The balance cantilever body has a first rope connection part and a second rope connection part opposite to the first rope connection part relative to the swing axis, The main cable body has a first main cable wound on the first drive pulley and a second main cable wound on the second drive pulley, The first main rope has a first car-side end connected to the first rope connection portion and a first counterweight-side end connected to the counterweight, The second main rope has a second car-side end connected to the second rope connecting portion and a second counterweight-side end connected to the counterweight, Wherein, absorbing springs are arranged respectively between the first and second rope connecting parts and the end parts of the first and second car sides, and the absorbing springs can resist the inclination of the cantilever body of the balance caused by the absorbing springs. Changes in connection angles between the first and second rope connection portions and the first and second car-side end portions are absorbed. 2. The elevator apparatus according to claim 1, further comprising a swing sensor for detecting the swing of the balance cantilever body. 3. The elevator apparatus according to claim 2, wherein a buffer is provided between the balance cantilever body and the car. 4. The elevator apparatus according to claim 2, further comprising a control device configured to control said first and second elevators based on information from said swing sensor when said car is in a stopped state. At least one side of the driving device is controlled to counteract the tilt state of the balance cantilever body. 5. The elevator apparatus according to claim 2, further comprising a control device for driving said first and second elevators according to information from said swing sensor during operation of said car. The device is controlled to counteract the tilted state of the balance cantilever body. 6. The elevator device according to claim 2, further comprising a control device, which controls the inclination angle of the balance cantilever body according to the information from the swing sensor during the operation of the car. The speed of change is detected, and it is judged whether the speed of change is below a preset value. 7. The elevator device according to claim 6, characterized in that, when the change speed of the inclination angle of the cantilever body of the balance exceeds the set value, the control device stops the car at the closest floors and output abnormal signals.

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