JPH03120188A - Vibro-suppressing device for elevator - Google Patents

Abstract

PURPOSE:To prevent an uncomfortable feeling from being given to passengers by providing a supporting condition selecting means in which a supporting condition of an elevator cage by the second supporting means is selected in accordance with various informations of elevator cage position, elevator cage speed, hoist braking torque, etc. CONSTITUTION:An elevator cage is resiliently supported always by a vibro- suppressing spring 6, which is the first supporting means, while supported selectively to resilient supporting and damper supporting through a damper 7 and a vibro-suppressing spring 22, which are the second supporting means in a position relation parallel with this vibrosuppressing coil 6, by on-off turning a solenoid 23 in accordance with various informations of cage position, cage speed, hoist braking torque, etc. Accordingly, in accordance with such as changing an elevator operation mode, a damping constant for vibration of the first and second supporting means total unit is suitably changed, and even in a motion condition whatever it may be, natural vibration of an elevator system total unit is prevented from interfering with disturbance with vibration of the cage suppressed.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an elevator vibration damping device.
In particular, the present invention relates to an elevator vibration damping device that suppresses vibrations of an elevator car depending on the operating state of the elevator.

[Prior Art] Conventionally, various vibration damping devices have been employed in elevators to suppress vibrations of elevator cars. For example, these vibration damping devices include Japanese Patent Application Laid-Open No. 57-85772,
Special Publication No. 63-11276 and Utility Model Publication No. 1273-1983
There is a technique described in Publication No. 57 and the like. Among these, Japanese Utility Model Application Publication No. 54-127357 describes a vibration damping device that combines a vibration isolating spring and a damper mechanism.

FIG. 5 is a side view showing the overall structure of an elevator equipped with a conventional elevator vibration damping device. Note that this vibration damping device is a combination of a vibration isolating spring and a damper mechanism.

In the figure, (1) is a hoist installed in the machine room, (2)
) is the rope wound around the hoist (1), (3) is the hanging sheave for the elevator car, and this hanging sheave (3)
The aforementioned rope (2) is also wrapped around it. (4) is a receiving member that rotatably supports the hanging sheave (3); (5)
(6) is an elevator car frame, (6) is a vibration-proof spring that supports the elevator car frame (5) with elastic force on the receiving member (4), (7)
) is also attached to the elevator car frame (5) in the same way as the anti-vibration spring (6).
) is supported by the damper on the receiving member (4). This damper support utilizes a vibration damping mechanism using hydraulic pressure or the like. (8) is the machine room floor that also serves as the ceiling of the hoistway;
9) is a receiving member of the shackle part that fixes the end of the rope (2) to the machine room floor (8), and (10) is a guard member that supports the receiving member (9) on the machine room floor (8) by elastic force. Swing spring, (1
1) is also a damper that supports the receiving member (9) on the machine room floor (8) similarly to the vibration isolating spring (10).

(12) is a car room arranged in the elevator car frame (5), (13) is a car room (12) and an elevator car frame (5).
) is a vibration isolating rubber interposed between the car chamber (12) and the elevator car frame (5) to block transmission of vibrations. (14) is a slip wheel that changes the hanging direction of the rope (2), (15) is a counterweight, and (16) is a counterbalance II! (15), and this pulley (16) also has the above-mentioned rope (2).
is wrapped around it. A shackle portion for fixing the other end of the rope (2) is also provided on the machine room floor (8) above the counterweight (15). Note that this shackle portion also includes a receiving member (9), an anti-vibration spring (10), and a damper (11).

In the elevator vibration damping device as described above, vibration isolating springs (6
) and damper (7) constitute a supporting part of the elevator car, the rope (2) supports the hanging sheave (3) and the receiving member (4), and this receiving member (4) is connected to the vibration isolating spring (,6 ) and a damper (7), the elevator car frame (5) is elastically supported and damper supported. In addition, the end of the rope (2) is also equipped with a vibration-proof spring (10) and a damper (11).
It is elastically supported and damper supported on the machine room floor (8) via. These anti-vibration springs (6), (10) and dampers (7), (11) suppress shocks and unnecessary vibrations received by the elevator car.

That is, in this type of elevator, the hoisting machine (1) raises and lowers the elevator car via the rope (2), but at this time, various vibrations may occur in the car chamber (12). Therefore, in the above vibration damping device for an elevator, the vibration isolating springs (6) and (10) reduce the vibration of the car compartment (12) due to unexpected disturbances during elevation. In addition, a damper (7
) (11). Furthermore, this damper (7)
, (11) also suppresses the rocking of the floor of the car (12) that occurs when passengers board the car (12).

This caused significant discomfort to passengers.

In addition, since the torque ripple frequency has a wide variation range, interference with the natural frequency of the entire elevator system, which is determined by the position of the elevator car, cannot be avoided in various operating modes.

(10) and the dampers (7) and (11) with only unique damping constants for vibrations cannot appropriately cope with these vibrations, and a sufficient vibration damping effect cannot be obtained.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vibration damping device for an elevator in which the natural vibrations of the elevator system as a whole do not interfere with external disturbances in any operating mode, and which does not cause discomfort to passengers.

[Problems to be Solved by the Invention] However, in the conventional elevator vibration damping device as described above, the torque ripple generated in the hoisting machine (1) is transmitted to the rope (2).
In addition to the hanging sheave (3), the vibration is amplified and transmitted to the car room (12) in a complicated manner by a spring and a mass system. a first support means that supports the elevator car, a second support means that supports the elevator car by switching between elastic support and damper support together with the first support means, and a state in which the elevator car is supported by the second support means. and support state switching means for switching the support state according to various information such as elevator car position information, elevator car speed information, and hoisting machine braking torque information.

[Function] In the elevator allocation device of the present invention, the elevator car is always elastically supported by the first support means, and the position information of the elevator car and the speed information of the elevator car are transmitted by the second support means and the support state switching means. The elevator car is supported by switching between elastic support and damper support according to various information such as information on the braking torque of the hoisting machine, and so on. The damping constant for the vibration of the entire second support means can be changed as appropriate, and interference between the natural vibration of the entire elevator system and external disturbances can be prevented in any operating condition.
The vibration of the elevator car can be reliably suppressed.

[Embodiment] FIG. 1 is a side view showing an elevator vibration damping device according to an embodiment of the present invention. In the figure, (2) and (7) are the same or equivalent components as those of the conventional example.

In the figure, (21) is the piston of the damper (7), (2
2) is an anti-vibration spring connected to this piston (21). . This anti-vibration spring (22) is located between the elevator car frame (5) and the piston (21).
) acts effectively, the elevator car frame (5) is elastically supported by the receiving member (4) via the piston (21) and damper (7). In addition, the anti-vibration spring (22)
supports the piston (21) so as to be located approximately in the center of the damper (7). (23) is the elevator car frame (
5) is a solenoid installed in the center, (24) is a plunger that moves up and down depending on the on/off of solenoid (23),
(25) is an oval-shaped crank, (26) is a support point that serves as a fulcrum when this crank (25) rotates, (27)
) is a pressing rod that presses the piston (21) of the damper (7), and (28) is the pressing rod (27) that holds the piston (21) in between.
The holding member (29) located on the opposite side of the press rod (27
), a press rod support member (30
) is a pressure rod spring that urges the pressure rod (27) in the direction of the crank (25).

The elevator vibration damping device of this embodiment is configured as described above, and the solenoid (23) is controlled by a control device (not shown) to receive information on the position of the elevator car, speed information on the elevator car, and the hoisting machine. It is controlled as appropriate according to various information such as braking torque information. Further, in this embodiment, the vibration isolating spring (6) constitutes the first support means that elastically supports the elevator car at all times, and the damper (7) and the vibration isolating spring (
22) together with the vibration isolation spring (6) constitute a second support means that supports the elevator car by switching between elastic support and damper support.

Next, the mechanical operation of this elevator vibration damping device will be explained.

First, when the solenoid (23) is turned on, the plunger (24) presses the tip of the crank (25), and the crank (25) rotates about the support point (26), causing the push rod to (27) is the pressure rod spring (30)
The member (28) holds the piston (21) against the force of the
to press. As a result, the piston (21) is fixed to the elevator car frame (5), and the piston (21) is fixed to the elevator car frame (5).
) is in a state where the damper is supported by the receiving member (4). Therefore, in this case, the damper (7) performs a vibration damping function by a predetermined damper function. On the other hand, when the solenoid (23) is turned off, the press rod (27) returns to its original position due to the urging force of the press rod spring (30), and the piston (21) separates from the holding member (28). As a result, the piston (21) is connected to the elevator car frame (5) via the vibration isolating spring (22), and the elevator car frame (5) and the receiving member (4) are elastically supported by the vibration isolating spring (22). state. therefore,
In this case, the damper (7) does not perform the predetermined damper function. In this way, in this elevator vibration damping device, the piston (21) is fixed/released from the elevator car frame (5) by turning on/off the solenoid (23), and is elastically supported by the vibration isolating spring (22). is disabled/enabled, and damper support by the damper (7) is enabled/disabled.

Here, the state in which the elevator car frame (5) is supported by the on/off control of the solenoid (23) will be described in detail with reference to the drawings. FIG. 2 is an explanatory diagram showing the support state when the solenoid of the elevator damping device, which is an embodiment of the present invention, is off, and FIG. It is an explanatory view showing a support state when it is on. In the figure, (4) to (7) and (22
) are constituent parts that are the same as or correspond to the constituent parts in FIG. 1 above.

When the solenoid (23) is off, the damper (7) and the anti-vibration spring (22) are in series, and the anti-vibration spring (6) is in parallel with the damper (7), as shown in Fig. 2, so that the elevator car frame ( 5) constitutes the support section. On the other hand, the solenoid (23
) is on, the damper (7) and the anti-vibration spring (6) are parallel to each other and the elevator car frame (5) is turned on, as shown in Figure 3.
). Therefore, the solenoid (23
) The damping constant for vibration of the entire support section changes depending on whether it is turned on or off. The elevator vibration damping device of this embodiment utilizes this to suppress the vibrations of the elevator car. Specifically, as shown in FIG. 4, by controlling the solenoid on/off according to the car speed, etc., the amount of vibration transmitted is always reduced, and the vibration of the elevator car is suppressed. FIG. 4 is a characteristic diagram showing the relationship between on/off control of a solenoid and vibration transmission characteristics of an elevator vibration damping device according to an embodiment of the present invention.

In FIG. 4, (a) shows the vibration transmission characteristic by the support part of the structure shown in FIG. 2, and (b) shows the vibration transmission characteristic by the support part of the structure shown in FIG. 3. In other words, as is clear from FIG. 4, the vibration transmission characteristics by the support part in the configuration shown in FIG. 2 and the vibration transmission characteristics by the support part in the configuration in FIG. The magnitude relationship between the amount of vibration transmitted by the support part in the configuration shown in the figure and the amount of vibration transmitted by the support part in the configuration shown in FIG.
2) It changes depending on the frequency of the vibration transmitted. Usually, the frequency of the vibrations generated by the hoist (1) and transmitted to the rope (2) is proportional to the speed of the elevator. for example,
The vibration of the elevator car due to the torque ripple generated by the hoisting machine (1) is controlled by the configuration shown in Fig. 3 just before the start (that is, when the frequency of the torque ripple is extremely small), as shown in the "solenoid control" shown in the lower part of Fig. 4. The transfer characteristic of the support part is lower than that of the support part of the configuration of FIG. Therefore, at this time, the solenoid (23) is turned on, and the elevator car frame (
I support 5). Next, as the speed increases, the solenoid (23) is switched from on to off at a point in time when the vibration transmission characteristics of the support section are reversed. This allows the second
The support part has the configuration shown in the figure, and the transmission characteristic of the support part at this time is lower than the transmission characteristic of the support part when the solenoid (23) is turned on. In this way, the solenoid (23
) is controlled on/off and always constitutes a support portion with low transfer characteristics. That is, the elevator car frame (5) is supported by the characteristic curve in which the small flames shown in the figure are connected.

In this way, by controlling the solenoid (23) on/off according to the frequency of the torque ripple of the hoisting machine (1) and changing the support state of the support part of the elevator car frame (5), this support part The damping constant for the overall vibration can be changed as appropriate. As a result, interference between the natural vibrations of the entire elevator system and external disturbances can be prevented, the best damping characteristics can always be maintained, and the vibrations of the elevator car can be reliably suppressed, so the riding comfort of the elevator car can be greatly improved.

In addition, in the above embodiment, the surging phenomenon of the rope (2) due to the speed change of the elevator car was described, but this rope surging phenomenon is caused by the position of the elevator car (i.e., the rope (2) from the hoisting machine (1) to the elevator car). 2)
Since the length of the solenoid (23) varies depending on various conditions such as the braking torque of the hoisting machine, it is preferable to perform on/off control of the solenoid (23) by comprehensively taking these circumstances into consideration. That is, it is preferable to appropriately change the support state of the support portion of the car in accordance with various information such as car position information, elevator car speed information, and hoisting machine braking torque information.

As mentioned above, the elevator vibration damping device of this embodiment is
A vibration isolating spring (6) as a first support means that always elastically supports the elevator car, and a damper as a second support means that supports the elevator car by switching between elastic support and damper support together with the first support means. (7) and anti-vibration spring (22
), and support state switching means for switching the support state of the elevator car by the second support means in accordance with various information such as elevator car position information, elevator car speed information, and hoisting machine braking torque information. Solenoid (23
) etc.

The elevator car is always elastically supported by an anti-vibration spring (6) as a first support means, and a damper (7) as a second support is arranged in parallel with the anti-vibration spring (6).
And the vibration isolation spring (22) supports the elevator car by switching between elastic support and damper support according to various information such as elevator car position information, elevator car speed information, and hoisting machine braking torque information. .

Therefore, in accordance with changes in the operation mode of the elevator, the damping constant for the vibration of the entire first and second supporting means can be changed as appropriate, and interference between the natural vibration of the entire elevator system and external disturbances can be prevented in any operating state. The vibration of the elevator car can be reliably suppressed. As a result, the ride comfort of the elevator is significantly improved.

By the way, the scope of use of this elevator vibration damping device is not limited to elevators with a rope arrangement as shown in the conventional example, but is also applicable to one-to-ten-plane elevators in which an elevator car and a counterweight are simply connected by a rope. Of course, it can also be used in other type elevators.

In the above embodiment, the explanation was mainly about switching the vibration transmission characteristics of the elevator damping device attached to the rope (2) and the elevator car frame (5). It may be adopted as a shackle part fixed to the floor (8), or it can be applied to a shock absorber for a hoistway pit floor, etc. That is, it can be applied to various places where vibration suppression is required, and the same effect as the above embodiment can be achieved no matter where it is used.

[Effects of the Invention] As explained above, the elevator vibration damping device of the present invention includes a first support means, a second support means, and a support state switching means, and the elevator car is connected to the first support means. The second support means and support state switching means elastically support the elevator car at all times according to various information such as elevator car position information, elevator car speed information, and hoisting machine braking torque information. With a simple configuration in which support is switched between support and damper support, the damping constant for vibrations of the entire first and second support means can be changed as appropriate in accordance with changes in the operation mode of the elevator, etc. Also, the interference between the natural vibration of the entire elevator system and external disturbances can be prevented, and the vibration of the elevator car can be reliably suppressed, thereby improving the ride comfort of the elevator.

[Brief explanation of drawings]

Fig. 1 is a side view showing an elevator vibration damping device which is an embodiment of the present invention, and Fig. 2 is a support state when the solenoid of the elevator vibration damping device which is an embodiment of the invention is off. An explanatory diagram, FIG. 3 is an explanatory diagram showing the supporting state when the solenoid of the elevator vibration damping device which is an embodiment of the present invention is on, and FIG. 4 is an explanatory diagram showing the vibration damping device of the elevator which is an embodiment of the present invention. A characteristic diagram showing the relationship between on/off control of the solenoid of the device and vibration transmission characteristics. FIG. 5 is a side view showing the overall configuration of an elevator equipped with a conventional elevator vibration damping device. In the figure, 2: Rope 3: Hanging sheave 4: Receiving member 5: Elevator car frame 6: Anti-vibration spring 21: Piston 23: Solenoid 25: Crank 28: Holding member 2 4 7 0: Damper: Anti-vibration spring: Plunger: Pressure rod: The pressure rod spring section shows the corresponding part.

Claims (1)

[Scope of Claims] A first support means that elastically supports the elevator car at all times; a second support means that supports the elevator car by switching between elastic support and damper support together with the first support means; An elevator characterized by comprising support state switching means for switching the support state of the elevator car by the second support means according to position information of the elevator car, speed information of the elevator car, and braking torque information of the hoisting machine. vibration damping device.