JP6615352B2 - Hydraulic elevator repair method and elevator apparatus - Google Patents

Description

  The present invention relates to a hydraulic elevator renovation method and an elevator apparatus for applying a linear motor drive.

  There is a conventional technique for modifying an existing hydraulic elevator to an elevator apparatus to which a ball screw drive motor is applied (for example, see Patent Document 1). Specifically, this patent document 1 removes both a hydraulic cylinder and a plunger from the hoistway 1, for example. As an alternative, Patent Document 1 arranges a ball screw for raising and lowering a car, a nut portion screwed into the ball screw, and a hollow shaft motor capable of rotationally driving the nut portion in a hoistway.

  As a result, Patent Document 1 can perform a renovation work so that the car can be raised and lowered through the drive of the nut portion and the ball screw accompanying the operation of the hollow shaft motor. Patent Document 1 also discloses a refurbishment method in which an existing plunger is diverted and a screw groove is formed on the peripheral surface of the plunger to be screwed into a nut portion of a hollow shaft motor to constitute a screw rod. Yes. In this way, Patent Document 1 realizes the repair work by installing relatively few devices.

  Moreover, there exists the prior art of the elevator apparatus to which a linear motor is applied (for example, refer patent document 2). Specifically, in Patent Document 2, a linear motor is housed in the center of the counterweight, and the car is moved up and down. Therefore, the existing hydraulic elevator can be modified to an elevator apparatus to which such a linear motor is applied.

JP, 2015-129042, A JP-A-9-255261

However, the prior art has the following problems.
In Patent Document 1, it is necessary to install a ball screw drive motor at the upper part of an existing cylinder and to replace an existing plunger with a screw cut over the entire length. As a result, there are problems that the repair cost is high and the noise is large.

  Further, Patent Document 2 requires the addition of a counterweight and a return wheel that connects the counterweight and the basket. Therefore, in order to secure the space for the counterweight when the renovation is performed, the cage size of the existing elevator must be reduced, and the cost increases. Furthermore, it is impossible to install a return wheel for an existing building that does not apply a load to the building such as a hydraulic elevator because of the strength of the building.

  Further, Patent Documents 1 and 2 do not consider any double brake structure.

  The present invention has been made in order to solve the above-described problems, and is an existing apparatus that applies a linear motor and realizes an elevator having a double brake structure without reducing the elevator car size. It is an object of the present invention to obtain a hydraulic elevator repair method and an elevator apparatus.

  The hydraulic elevator refurbishing method according to the present invention is a linear motor type elevator apparatus comprising a hydraulic cylinder and a plunger that is housed in the hydraulic cylinder and moves up and down by hydraulic pressure to raise and lower the elevator cage. The first step of attaching a cylindrical linear motor having a primary coil formed so as to surround the plunger above the hydraulic cylinder, and the first step of braking the raising and lowering of the cage A second step of installing a braking mechanism; a third step of installing a second braking mechanism by using an existing hydraulic mechanism and providing a stop valve for stopping the flow of working oil when the cage is stopped; A fourth system is provided with a controller for controlling the linear motor, the first braking mechanism, and the second braking mechanism. Tsu is one having a flop.

  The elevator apparatus according to the present invention includes a hydraulic cylinder used in the hydraulic elevator apparatus, a plunger housed in the hydraulic cylinder, and a primary coil that is installed above the hydraulic cylinder and surrounds the plunger. A cylindrical linear motor, a first braking mechanism that is installed in a cage that moves up and down, has a gripping portion that grips the guide rail of the cage, and stops on the path of the working oil. A second braking mechanism having a valve and maintaining the stopped state of the basket by closing the stop valve.

  According to the present invention, a linear motor drive is realized by attaching a cylindrical linear motor formed with a primary coil so as to surround a plunger above a hydraulic cylinder, and a part of an existing hydraulic circuit is diverted. The second braking mechanism can be added by controlling the opening / closing of the check valve. As a result, it is possible to obtain a modification method and an elevator apparatus for an existing hydraulic elevator that applies a linear motor and realizes an elevator equipped with a double brake structure without reducing the elevator car size.

1 is an overall configuration diagram of an elevator apparatus to which a linear motor according to Embodiment 1 of the present invention is applied. It is a whole block diagram of the existing direct connection type hydraulic elevator apparatus. It is a whole block diagram of the elevator apparatus to which the permanent magnet synchronous linear motor in Embodiment 2 of this invention is applied. It is a whole block diagram of the elevator apparatus to which the induction type linear motor in Embodiment 3 of this invention is applied. 1 is an overall configuration diagram of an existing indirect hydraulic elevator apparatus. It is a whole block diagram of the elevator apparatus to which the permanent magnet synchronous linear motor in Embodiment 4 of this invention is applied.

  Hereinafter, preferred embodiments of a method for repairing an existing hydraulic elevator and an elevator apparatus according to the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is an overall configuration diagram of an elevator apparatus to which a linear motor according to Embodiment 1 of the present invention is applied. FIG. 1 shows a state after an existing hydraulic elevator has been modified to a linear motor drive system.

  On the other hand, FIG. 2 is an overall configuration diagram of an existing directly connected hydraulic elevator apparatus. When the existing direct-coupled hydraulic elevator apparatus shown in FIG. 2 is modified to an elevator apparatus to which a linear motor is applied, the state shown in FIG. 1 is obtained.

  Therefore, the elevator apparatus to which the linear motor according to the first embodiment is applied will be specifically described with reference to the configuration of FIG. 1 obtained by performing the modification on the state before the modification of FIG.

  As shown in FIG. 1, in the elevator apparatus according to the first embodiment, a brake 3 and a guide device 4 are attached to a cage 2 that moves up and down in the hoistway 1. The cage 2 moves up and down in the hoistway 1 by being guided by the guide device 4 along the guide rail 5 installed in the hoistway 1.

  The primary coil portion 7 of the induction linear motor is attached to the upper portion of the cylinder 6 of the existing hydraulic jack. Further, the secondary conductor 8 of the induction linear motor is obtained by diverting the plunger 17 of the existing hydraulic jack shown in FIG. 2 as it is. Alternatively, as the secondary conductor 8, a surface member made of aluminum, copper, or the like, which does not easily generate heat, and is an efficient conductor can be employed.

  Further, the position control of the basket 2 is a control (not shown) using an encoder 9, a lower pulley / weight 10 and an interlocking rope 11 arranged in the hoistway 1, which have been adopted in the hydraulic system before the repair. Executed by the device. The control device operates the brake 3 newly added after the drive system is modified to the linear motor when stopping at each floor during normal traveling.

  Specifically, the brake 3 can be configured as a braking mechanism having a grip portion that grips the guide rail 5 of the cage 2. And by adding such a braking mechanism, it becomes possible to hold the basket 2 reliably.

  When renovating from the hydraulic system to the linear motor drive system, it is conceivable to extract the working oil of the existing hydraulic elevator. However, the present invention realizes a double brake structure by newly applying the stop valve 14 having only a check valve without draining the working oil of the existing hydraulic elevator after the modification to the linear motor drive system. Is a technical feature.

  More specifically, the existing hydraulic elevator before renovation shown in FIG. 2 includes, as hydraulic control related devices, a control panel 12, an oil tank 13, a hydraulic pump 18 installed in the oil tank 13, and an oil amount control. A valve 19 and a pipe 15 are provided.

  On the other hand, the elevator after the modification shown in FIG. 1 uses the control panel 12, the oil tank 13, and the piping 15, and a stop valve 14 having only a check valve is newly installed in the oil tank 13. ing.

  The stop valve 14 is modified to leave only the check valve of the existing oil amount control valve 19 and to remove the other oil amount control valves or to release them all instead of newly installing the stop valve 14. It is also possible to do. In any case, by making effective the control of only the opening and closing of the check valve, the repaired elevator apparatus can have a second braking mechanism using hydraulic pressure.

  As a result, the elevator apparatus after the modification shown in FIG. 1 performs the opening / closing control of the check valve of the stop valve 14 so that the cage 2 is securely held by the hydraulic mechanism when the cage 2 stops at each stop floor. It has a possible configuration. That is, in addition to the first braking mechanism for gripping the guide rail 5, a double brake structure including such a second braking mechanism using hydraulic pressure can be realized.

  Although not shown in FIG. 1, a shock absorber is installed at the bottom of the hoistway 1. This shock absorber has a function of mitigating the impact caused by the basket 2 colliding with the bottom.

In order to obtain an elevator apparatus after renovation using a linear motor, the comparison results of the structure after renovation shown in FIG. 1 and the structure before renovation shown in FIG. 2 are arranged. Will be carried out.
The plunger 17 is used as it is as the secondary conductor 8 of the induction linear motor.
-The primary coil part 7 of the brake 3 and the linear motor is newly provided.
A part of the hydraulic elevator equipment is diverted and a stop valve 14 having only a check valve is newly provided in the oil tank 13.

  By the above-described repair work, a cylindrical linear motor having a primary coil formed so as to surround the plunger can be easily attached above the hydraulic cylinder. Furthermore, a second braking mechanism that can hold the stopped state of the basket using the hydraulic mechanism can be easily added.

  Therefore, it is possible to obtain a method for repairing an existing hydraulic elevator and an elevator apparatus that can easily implement an elevator with a double brake structure by applying a linear motor without reducing the size of the elevator car. Is possible.

As described above, the elevator apparatus to which the linear motor according to Embodiment 1 is applied can obtain the following effects.
(Effect 1) The elevator apparatus according to the first embodiment realizes driving by a linear motor by using a hydraulic jack plunger as a secondary conductor of the induction linear motor. As a result, the repair can be easily performed with an inexpensive configuration.

(Effect 2) The elevator apparatus according to the first embodiment enables the application of a linear motor without adopting the configuration of a rope type elevator. Therefore, it is not necessary to return the balance weight or the balance weight and the basket to the hangar type with a vehicle. As a result, the load on the return wheel is not borne on the building side, and it is possible to repair a building with a restriction that cannot load the existing building.

(Effect 3) The elevator apparatus according to the first embodiment does not employ a drive system such as a pole screw. As a result, an elevator apparatus that can be applied without causing the problem of noise vibration even when a hydraulic elevator with very little noise vibration is repaired is obtained. Moreover, if it is a superconducting linear motor drive, an extremely energy-saving elevator apparatus can also be provided.

(Effect 4) Further, the elevator apparatus according to the first embodiment uses the existing hydraulic circuit to provide a second braking mechanism that uses the hydraulic pressure when the car is stopped with respect to the elevator apparatus after the repair. Can be easily added. As a result, an elevator device having a double brake structure can be easily realized.

Embodiment 2. FIG.
In the first embodiment, the case where the existing directly connected hydraulic elevator apparatus is modified to an elevator apparatus to which a linear motor is applied has been described. On the other hand, in the second embodiment, a case will be described in which an existing direct-coupled hydraulic elevator apparatus is modified to an elevator apparatus to which a permanent magnet synchronous linear motor is applied.

  FIG. 3 is an overall configuration diagram of an elevator apparatus to which the permanent magnet synchronous linear motor according to Embodiment 2 of the present invention is applied. FIG. 3 shows a state after the existing hydraulic elevator is modified to a permanent magnet synchronous linear motor drive system.

  Compared with the configuration of the elevator apparatus to which the linear motor in the first embodiment shown in FIG. 1 is applied, the configuration of the elevator apparatus to which the permanent magnet synchronous linear motor in the second embodiment shown in FIG. The difference is that the secondary conductor 20 of the permanent magnet synchronous linear motor is used instead of the secondary conductor 8 of the induction linear motor. Therefore, this difference will be mainly described below.

  In the first embodiment, the plunger 17 is used as it is as the secondary conductor 8 of the induction linear motor. On the other hand, in this Embodiment 2, the plunger 17 is removed and the secondary conductor 20 of a permanent magnet synchronous linear motor is newly installed instead. Here, the secondary conductor 20 of the permanent magnet synchronous linear motor is a secondary conductor configured by arranging the S poles and N poles of the permanent magnet alternately in a cylindrical shape.

When the comparison result between the configuration after the modification shown in FIG. 3 and the configuration before the modification shown in FIG. 2 of the first embodiment is arranged, an elevator apparatus after the modification using a permanent magnet synchronous linear motor is obtained. To do this, the following renovation work will be performed.
Remove the plunger 17 and replace it with the secondary conductor 20 of the permanent magnet synchronous linear motor.
-The primary coil part 7 of the brake 3 and a permanent magnet synchronous linear motor is newly provided.
A part of the hydraulic elevator equipment is diverted and a stop valve 14 having only a check valve is newly provided in the oil tank 13.

  By the above-described repair work, a cylindrical linear motor having a primary coil formed so as to surround the plunger can be easily attached above the hydraulic cylinder. Furthermore, a second braking mechanism that can hold the stopped state of the basket using the hydraulic mechanism can be easily added.

  Therefore, a modification method and an elevator apparatus for an existing hydraulic elevator that can easily realize an elevator with a double brake structure by applying a permanent magnet synchronous linear motor without reducing the elevator car size, with a simple configuration. Can be obtained.

  As described above, the elevator apparatus to which the permanent magnet synchronous linear motor in the second embodiment is applied uses the linear motor described in the first embodiment even when the permanent magnet synchronous linear motor is used. Similarly, effects 1 to 4 can be obtained.

Embodiment 3 FIG.
In the first embodiment, the case where the existing directly connected hydraulic elevator apparatus is modified to an elevator apparatus to which a linear motor is applied has been described. On the other hand, this Embodiment 3 demonstrates the case where the existing indirect hydraulic elevator apparatus is renovated to an elevator apparatus to which a linear motor is applied.

  FIG. 4 is an overall configuration diagram of an elevator apparatus to which the induction type linear motor according to the third embodiment of the present invention is applied. FIG. 4 shows a state after an existing indirect hydraulic elevator is refurbished to a linear motor drive system.

  On the other hand, FIG. 5 is an overall configuration diagram of an existing indirect hydraulic elevator apparatus. When the existing indirect hydraulic elevator apparatus shown in FIG. 5 is modified to an elevator apparatus using a linear motor, the state shown in FIG. 4 is obtained.

  Therefore, the elevator apparatus to which the linear motor according to the third embodiment is applied will be specifically described with reference to the configuration of FIG. 4 obtained by performing the modification on the state before the modification of FIG.

  As is clear from the comparison between FIG. 5 and FIG. 2, the existing indirect hydraulic elevator device is different from the existing direct hydraulic elevator device in that the slack type emergency stop device 22, the operating spring 23 of the slack type emergency stop device, A return wheel 24 for an indirect hydraulic jack, a suspension rope 25 for an indirect hydraulic jack, and a jack stand / suspending rope terminal fixing metal 26 are further provided.

  The existing indirect hydraulic elevator apparatus has such a new configuration, so that the movement of the plunger 17 that moves up and down by hydraulic pressure can be indirectly transmitted to the cage 2. As a result, the cylinder 6 of the jack is not buried in the ground and is contained in the hoistway 1.

When the comparison results of the configuration after the modification shown in FIG. 4 and the configuration before the modification shown in FIG. 5 are arranged, in order to obtain an elevator apparatus after the modification using the linear motor, the first embodiment is used. In the same way, the following renovation work will be carried out.
The plunger 17 is used as it is as the secondary conductor 8 of the induction linear motor.
-The primary coil part 7 of the brake 3 and the linear motor is newly provided.
A part of the hydraulic elevator equipment is diverted and a stop valve 14 having only a check valve is newly provided in the oil tank 13.

  By the above-described repair work, a cylindrical linear motor having a primary coil formed so as to surround the plunger can be easily attached above the hydraulic cylinder. Furthermore, a second braking mechanism that can hold the stopped state of the basket using the hydraulic mechanism can be easily added.

  Therefore, it is possible to obtain a method for repairing an existing hydraulic elevator and an elevator apparatus that can easily implement an elevator with a double brake structure by applying a linear motor without reducing the size of the elevator car. Is possible.

  As described above, in the elevator apparatus to which the linear motor according to the third embodiment is applied, even when the existing hydraulic elevator apparatus is an indirect type, as in the case where the existing hydraulic elevator apparatus is a direct type, Effects 1 to 4 can be obtained.

  FIG. 4 shows a case where the cylinder 6 of an existing indirect hydraulic elevator is used. However, in the case of an indirect hydraulic elevator, the jack cylinder is not buried in the ground. For this reason, the cylinder 6 may be used, but it is also possible to remove the cylinder 6 and newly construct a plunger guide device equivalent to a cylindrical cylinder instead of the cylinder 6.

Embodiment 4 FIG.
In the previous third embodiment, the case where the existing indirect hydraulic elevator apparatus is modified to an elevator apparatus to which a linear motor is applied has been described. In contrast, in the fourth embodiment, a case will be described in which an existing indirect hydraulic elevator apparatus is modified to an elevator apparatus to which a permanent magnet synchronous linear motor is applied.

  FIG. 6 is an overall configuration diagram of an elevator apparatus to which the permanent magnet synchronous linear motor according to Embodiment 4 of the present invention is applied. FIG. 6 shows a state after the existing indirect hydraulic elevator is modified to a permanent magnet synchronous linear motor drive system.

  Compared with the configuration of the elevator apparatus to which the linear motor in the third embodiment shown in FIG. 4 is applied, the configuration of the elevator apparatus to which the permanent magnet synchronous linear motor in the fourth embodiment shown in FIG. The difference is that the secondary conductor 20 of the permanent magnet synchronous linear motor is used instead of the secondary conductor 8 of the induction linear motor. Therefore, this difference will be mainly described below.

  In the previous third embodiment, the plunger 17 is used as it is as the secondary conductor 8 of the induction linear motor. On the other hand, in this Embodiment 4, the plunger 17 is removed and the secondary conductor 20 of a permanent magnet synchronous linear motor is newly installed instead.

When the comparison result between the configuration after the modification shown in FIG. 6 and the configuration before the modification shown in FIG. 5 of the third embodiment is arranged, an elevator apparatus after the modification to which a permanent magnet synchronous linear motor is applied is obtained. To do this, the following renovation work will be performed.
Remove the plunger 17 and replace it with the secondary conductor 20 of the permanent magnet synchronous linear motor.
-The primary coil part 7 of the brake 3 and a permanent magnet synchronous linear motor is newly provided.
A part of the hydraulic elevator equipment is diverted and a stop valve 14 having only a check valve is newly provided in the oil tank 13.

  By the above-described repair work, a cylindrical linear motor having a primary coil formed so as to surround the plunger can be easily attached above the hydraulic cylinder. Furthermore, a second braking mechanism that can hold the stopped state of the basket using the hydraulic mechanism can be easily added.

  Therefore, a modification method and an elevator apparatus for an existing hydraulic elevator that can easily realize an elevator with a double brake structure by applying a permanent magnet synchronous linear motor without reducing the elevator car size, with a simple configuration. Can be obtained.

  As described above, the elevator apparatus to which the permanent magnet synchronous linear motor according to the fourth embodiment is applied uses the linear motor described in the third embodiment even when the permanent magnet synchronous linear motor is used. Similarly, effects 1 to 4 can be obtained.

  As in the third embodiment, the cylinder 6 may be used. However, the cylinder 6 is removed, and a plunger guide device equivalent to a cylindrical cylinder is newly constructed instead of the cylinder 6. It is also possible to do.

The characteristics of the present invention according to Embodiments 1 to 4 described above are summarized as follows.
(1) In the modification of an existing hydraulic elevator, a linear motor is applied, and the existing hydraulic elevator can be easily repaired without reducing the cage size of the existing elevator.
(2) A configuration is adopted in which a cylinder of an existing hydraulic device is diverted and a cylindrical linear motor can be installed on top of the cylinder of the existing hydraulic device.

(3) Only the plunger needs to be replaced.
(4) However, the existing plunger can be used as it is as the secondary conductor of the linear motor. That is, in the linear motor according to the present invention, when the secondary conductor is left as iron, the existing plunger can be used as it is.
(5) Further, aluminum or copper that is less likely to generate heat and is efficient may be disposed on the surface of the plunger.

(6) As the applied linear motor, any linear motor such as an induction linear motor or a permanent magnet synchronous linear motor can be applied.
(7) A part of the hydraulic control circuit of the existing hydraulic elevator is diverted and the check valve is controlled to easily add the second braking mechanism that can hold the stopped state of the basket. As a result, it is not necessary to extract the working oil of the existing hydraulic elevator, and the second braking mechanism can be added, and an elevator apparatus having a double brake structure can be realized with an inexpensive configuration.

Claims (5)

This is a hydraulic elevator repair method for repairing a hydraulic elevator apparatus that includes a hydraulic cylinder and a plunger that is housed in the hydraulic cylinder and moves up and down by hydraulic pressure to raise and lower the elevator cage. And
A first step of attaching a cylindrical linear motor having a primary coil formed so as to surround the plunger above the hydraulic cylinder;
A second step of installing a first braking mechanism for braking the raising and lowering of the basket;
A third step of installing the second braking mechanism by using an existing hydraulic mechanism and providing a stop valve for stopping the flow of the working oil when the basket is stopped;
A hydraulic elevator refurbishing method comprising: a fourth step of installing a controller that controls the linear motor, the first braking mechanism, and the second braking mechanism. In the third step, the existing oil amount control valve is removed and the stop valve is newly installed, or only the check valve of the existing oil amount control valve is left and used as the stop valve. The method for repairing a hydraulic elevator according to claim 1, comprising any of the steps. 3. The method for repairing a hydraulic elevator according to claim 1, wherein the second step includes a step of installing the first braking mechanism including a grip portion that grips a guide rail of the basket. 4. The hydraulic elevator according to any one of claims 1 to 3, wherein the first step includes a step of replacing the plunger, which is a secondary conductor of the linear motor, with another plunger suitable for the linear motor. Repair method. A hydraulic cylinder for use in a hydraulic elevator system;
A plunger housed in the hydraulic cylinder;
A cylindrical linear motor installed above the hydraulic cylinder and having a primary coil formed so as to surround the plunger;
A first braking mechanism that is installed in a basket that performs the lifting operation, has a gripping part that grips the guide rail of the basket, and brakes the lifting and lowering of the basket;
An elevator apparatus comprising: a second braking mechanism having a stop valve on a path of the working oil and maintaining the stop state of the basket by closing the stop valve.

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