WO2018179097A1

WO2018179097A1 - Elevator and method for repairing hydraulic elevator

Info

Publication number: WO2018179097A1
Application number: PCT/JP2017/012683
Authority: WO
Inventors: 安藤　英司
Original assignee: 三菱電機株式会社
Priority date: 2017-03-28
Filing date: 2017-03-28
Publication date: 2018-10-04
Also published as: JPWO2018179097A1

Abstract

This elevator is obtained by modifying an existing hydraulic elevator which is provided with a hydraulic jack having a cylinder and a plunger moving in the vertical direction with respect to the cylinder, and in which a car moves in the vertical direction as the plunger moves in the vertical direction by means of hydraulic pressure. This elevator is configured to be provided with: a fixed member provided on the plunger; a movable member fixed to the fixed member; a threaded rod engaging with the movable member; and a driving device which rotates the threaded rod to move the movable member in the vertical direction and thereby move the plunger in the vertical direction.

Description

Repair method for elevators and hydraulic elevators

The present invention relates to an elevator obtained by repairing an existing hydraulic elevator, and a method for repairing a hydraulic elevator that repairs an existing hydraulic elevator.

Conventionally, when repairing an existing hydraulic elevator, the hydraulic jack and the jack rail, which are components of the hydraulic elevator, are removed from the hoistway, and the space after the removal is used to balance the hoisting machine and the counterweight guide rail. A return wheel is newly installed (see, for example, Patent Document 1).

Japanese Patent No. 5951104

Conventionally, when repairing an existing hydraulic elevator, as described above, the operation of removing the components of the hydraulic elevator such as the hydraulic jack and the jack rail from the hoistway and the new operation such as the hoisting machine, the counterweight guide rail and the return wheel The work which installs a member in a hoistway is needed. That is, when repairing a hydraulic elevator, many members must be removed from the hoistway and many members must be newly installed in the hoistway. Therefore, the period required for renovation of the hydraulic elevator may be increased, and as a result, the elevator stop period may be increased.

The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an elevator and a method for repairing a hydraulic elevator that can shorten the time required for repairing an existing hydraulic elevator.

The elevator according to the present invention includes a hydraulic jack having a cylinder and a plunger that moves in a vertical direction with respect to the cylinder, and is configured such that the car moves in the vertical direction when the plunger moves in the vertical direction by hydraulic pressure. It is an elevator obtained by refurbishing an existing hydraulic elevator, which is a fixed member provided on the plunger, a movable member fixed to the fixed member, a screw rod meshing with the movable member, and rotating the screw rod. And a drive device that moves the movable member in the vertical direction and moves the plunger in the vertical direction.

The hydraulic elevator repair method according to the present invention includes a hydraulic jack having a cylinder and a plunger that moves in the vertical direction relative to the cylinder, and the cage moves in the vertical direction by the hydraulic pressure so that the car moves in the vertical direction. A method of refurbishing the hydraulic elevator of the present invention is a method in which a fixed member is provided on the plunger, a movable member meshing with the screw rod is fixed to the fixed member, and the movable member is moved up and down by rotating the screw rod. The method includes a step of installing a drive device for moving the upper and lower portions in the hoistway and a step of removing oil from the hydraulic jack.

According to the present invention, an elevator after renovation of an existing hydraulic elevator makes maximum use of the components of the hydraulic elevator, and further, the plunger of the hydraulic jack is moved up and down by the rotational driving force generated by the newly installed driving device. It is comprised so that it may become a form moved to a direction. As a result, it is possible to obtain an elevator and a method for repairing the hydraulic elevator, which are intended to shorten the time required for repairing the existing hydraulic elevator.

It is a top view which shows the elevator in Embodiment 1 of this invention. It is a side view which shows the elevator of FIG. It is a top view which shows the existing hydraulic elevator before renovating to the elevator of FIG. It is a side view which shows the hydraulic elevator of FIG. It is a side view which shows the elevator of the 1st step of the process which repairs the hydraulic elevator of FIG. It is a side view which shows the elevator of the 2nd step of the process which repairs the hydraulic elevator of FIG. It is a side view which shows the elevator in Embodiment 2 of this invention.

Hereinafter, an elevator and hydraulic elevator repair method according to the present invention will be described with reference to the drawings according to a preferred embodiment. In the description of the drawings, the same portions or corresponding portions are denoted by the same reference numerals, and redundant description is omitted.

Embodiment 1 FIG.
FIG. 1 is a plan view showing an elevator according to Embodiment 1 of the present invention. FIG. 2 is a side view showing the elevator of FIG. The elevator shown in FIGS. 1 and 2 is an elevator obtained by refurbishing an existing hydraulic elevator.

A car 2 is provided in the hoistway 1, and the car 2 moves up and down in the hoistway 1, that is, moves up and down in the hoistway 1. A hydraulic jack 3 is installed at a lower position in the hoistway 1 so as not to overlap the car 2. That is, the hydraulic jack 3 is disposed at a position that does not overlap the car 2 within the horizontal projection plane of the hoistway 1.

The hydraulic jack 3 includes a cylinder 4 and a plunger 5 that is accommodated in the cylinder 4 and moves in the vertical direction with respect to the cylinder 4. A rope 7 for suspending the car 2 is wound around a deflecting wheel 6 provided on the upper portion of the plunger 5. As the plunger 5 moves in the vertical direction, the deflector wheel 6 moves in the vertical direction, and the car 2 moves in the vertical direction in conjunction therewith. The amount of movement of the car 2 is twice the amount of movement of the plunger 5.

A car side rope clamp 8 is provided at the lower part of the car 2, and one end of the rope 7 is fixed to the car rope clamp 8. At the base of the hydraulic jack 3 installed at the lower part in the hoistway 1, a hoistway side rope clamp 9 is provided, and the other end of the rope 7 is fixed to the hoistway side rope clamp 9. One end of the rope 7 is fixed to the car-side rope stopper 8 and directed upward, turned to the deflector wheel 6 and directed downward, and the other end is fixed to the hoistway-side rope stopper 9.

A pair of jack rails 10 that guide the movement of the plunger 5 in the vertical direction are installed on both sides of the hydraulic jack 3. The jack rail 10 also guides the vertical movement of the deflecting wheel 6 provided on the upper portion of the plunger 5.

Here, the car 2, the hydraulic jack 3, the baffle 6, the rope 7, the car side rope clamp 8, the hoistway side rope clamp 9, and the jack rail 10 are components of the hydraulic elevator. In the hydraulic elevator, the cage 5 is moved in the vertical direction by moving the plunger 5 in the vertical direction by the hydraulic pressure generated by a hydraulic power unit (not shown).

On the other hand, the elevator according to the first embodiment uses the components of the hydraulic elevator described above, and the plunger 5 is driven not by the hydraulic pressure from the hydraulic power unit but by the rotational driving force generated by the driving device 14 described later. The car 2 is moved up and down to move up and down.

1 and 2, a support frame 11 as a fixing member is provided on the upper portion of the plunger 5 of the hydraulic jack 3, and a deflector 6 is installed via the support frame 11. Near the top of the hoistway 1 above the hydraulic jack 3, a machine base support member 12 fixed by an anchor bolt driven into the wall of the hoistway 1 is provided. The machine table support member 12 supports the machine table 13.

The driving device 14 has a vertical rotating shaft and generates a rotational driving force, and is installed on the machine base 13. The drive device 14 is configured using, for example, a motor. The screw rod 15 attached to the rotating shaft of the drive device 14 in the vertical direction extends in the vertical direction toward the lower portion of the hoistway 1 through a gap provided in the machine base 13. The drive device 14 rotates the screw shaft 15 attached to the rotation shaft by rotating the rotation shaft clockwise or counterclockwise.

A ball nut 16 configured to engage with the screw rod 15 via a ball is fixed to the support frame 11. The ball nut 16 meshes with the screw rod 15, and moves up and down with respect to the screw rod 15 when the screw rod 15 rotates clockwise or counterclockwise by driving of the driving device 14. The screw rod 15 and the ball nut 16 constitute a ball screw. Here, the case where the ball nut 16 is used as the movable member configured to mesh with the screw rod 15 is illustrated, but the present invention is not limited to this. For example, a nut configured to engage with the screw rod 15 by grease lubrication may be used as the movable member.

Since the ball nut 16 is fixed to the support frame 11, the plunger 5 and the deflecting wheel 6 also move in the vertical direction via the support frame 11 in conjunction with the vertical movement of the ball nut 16. As a result, the car 2 moves in the vertical direction via the rope 7 in conjunction with the vertical movement of the deflector 6.

Thus, the hydraulic jack 3 having the cylinder 4 and the plunger 5 that moves in the vertical direction with respect to the cylinder 4 is provided, and the cage 2 moves in the vertical direction by the hydraulic pressure so that the car 2 moves in the vertical direction. The elevator according to the first embodiment can be obtained by refurbishing the existing hydraulic elevator configured as described above.

The elevator according to the first embodiment rotates the support frame 11 provided on the plunger 5, the ball nut 16 fixed to the support frame 11, the screw rod 15 meshing with the ball nut 16, and the screw rod 15. And a drive device 14 for moving the plunger 5 in the vertical direction by moving the ball nut 16 in the vertical direction.

¡By adopting such an elevator structure, it is possible to reduce the number of members to be removed from the hydraulic elevator before renovation and the number of newly installed members when refurbishing an existing hydraulic elevator.

Next, a method for repairing the hydraulic elevator according to the first embodiment will be described with reference to FIGS. FIG. 3 is a plan view showing an existing hydraulic elevator before the elevator shown in FIG. 1 is repaired. FIG. 4 is a side view showing the hydraulic elevator of FIG. FIG. 5 is a side view showing the first stage elevator in the process of repairing the hydraulic elevator of FIG. FIG. 6 is a side view showing the second stage elevator in the process of repairing the hydraulic elevator of FIG.

As shown in FIGS. 3 and 4, the car 2, the hydraulic jack 3, the baffle 6, the rope 7, the car side rope clamp 8, the hoistway side rope clamp 9, and the jack rail 10 are installed in the hoistway 1. It is a structural member of an elevator. As described above, the elevator according to the first embodiment is configured to use these members.

Next, the first stage of the repair process of the hydraulic elevator will be explained. As shown in FIG. 5, first, in order to provide the machine base 13 in the space above the hydraulic jack 3, specifically, in the space near the top of the hoistway 1, the machine base is mounted on the wall of the hoistway 1 by anchor bolts. The support member 12 is fixed. Thereafter, the machine base 13 is provided on the upper part of the hoistway 1 by using the machine base support member 12.

Subsequently, the ball screw driving device 17 in which the driving device 14, the screw rod 15 and the ball nut 16 are integrated is carried into the hoistway 1 and placed near the corner of the hoistway 1 so as not to obstruct work. deep.

Subsequently, the car 2 is lifted with a chain block or the like installed in the hoistway 1, the tension of the rope 7 is released and loosened, and the end of the rope 7 fixed to the car side rope stopper 8 is removed from the car side rope stopper 8. Further, the rope 7 is deflected and fixed to the vehicle 6 so that the rope 7 does not fall.

Subsequently, the deflection wheel 6 attached to the top of the plunger 5 is removed from the plunger 5 and lifted, and the support frame 11 is inserted and fixed between the deflection wheel 6 and the plunger 5, and the deflection wheel 6 is attached to the support frame 11. Fix it.

Next, the second stage of the hydraulic elevator repair process will be described. After the baffle 6 is fixed to the support frame 11, the ball screw driving device 17 is lifted, and the driving device 14 is fixed to the machine base 13 and the ball nut 16 is fixed to the support frame 11 as shown in FIG. 6.

Subsequently, the control device (not shown) for controlling the drive of the drive device 14 and controlling the operation of the elevator is electrically connected to the drive device 14. The driving device 14 is driven according to a control signal from the control panel, and rotates the screw rod 15.

Subsequently, the hydraulic jack 3 is drained, and the drive unit 14 is driven to rotate the screw rod 15 to lower the plunger 5 to an appropriate height.

Subsequently, the chain 2 that is hanging the car 2 is operated to raise the car 2 to an appropriate height, the end of the rope 7 is attached to the car side rope stop 8, the load on the chain block is removed, and the car 2 Remove the chain block. After that, adjustment is performed so that the raising / lowering control of the car 2 can be performed by driving the driving device 14, and a series of repair work is completed.

As described above, in the hydraulic elevator repair method according to the first embodiment, the plunger 5 is provided with the support frame 11, the step of fixing the ball nut 16 meshing with the screw rod 15 to the support frame 11, and the screw rod 15 is rotated. And a step of installing the drive device 14 for moving the ball nut 16 in the vertical direction in the hoistway 1.

In the repair of hydraulic elevators, the time required for completing the repair work can be shortened by executing the repair process as described above.

As described above, the elevator according to the first embodiment is movable by rotating the fixed member provided on the plunger of the existing hydraulic elevator, the movable member fixed to the fixed member, the screw rod meshing with the movable member, and the screw rod. And a drive device that moves the member in the vertical direction and moves the plunger in the vertical direction.

Thus, the existing hydraulic elevator can be remodeled into an elevator that moves the car in the vertical direction by moving the plunger in the vertical direction by the rotational driving force generated by the newly provided driving device. Further, when the existing hydraulic elevator is refurbished, the constituent members of the hydraulic elevator are utilized to the maximum, so that the renovation period can be shortened and the renovation cost can be reduced.

Embodiment 2. FIG.
In the second embodiment of the present invention, a case where the installation location of the driving device 14 is different from that of the first embodiment will be described. In the second embodiment, description of points that are the same as those of the first embodiment will be omitted, and points different from the first embodiment will be mainly described.

FIG. 7 is a side view showing an elevator according to Embodiment 2 of the present invention. Note that the elevator shown in FIG. 7 is an elevator obtained by refurbishing an existing hydraulic elevator.

As shown in FIG. 7, a machine base 18 is attached to the upper end of the jack rail 10, and a support beam 19 is attached to the lower end of the jack rail 10. Further, the lower surface of the support beam 19 is fixed to the cylinder 4 of the hydraulic jack 3. Further, the driving device 14 is installed on the machine base 18, and the screw rod 15 attached to the rotation shaft of the driving device 14 in the vertical direction passes through a gap provided in the machine base 18 and is located below the hoistway 1. It extends in the vertical direction.

Thus, by using the machine base 18 and the support beam 19 attached to the jack rail 10, the downward load acting on the driving device 14 is transmitted to the cylinder 4 through the jack rail 10, and the pit surface of the hoistway 1 1a can be supported.

As can be seen from the above, in the elevator according to the second embodiment, the drive device 14 is supported by the machine base 18 provided at one end of the jack rail 10. Furthermore, in contrast to such a configuration, a configuration is further provided with a support beam 19 provided as a support member provided between the other end of the jack rail 10 and the cylinder 4 so that the cylinder 4 supports the load of the drive device 14. It has become.

Here, in the first embodiment, it is necessary to drive an anchor bolt into the wall of the hoistway 1 in order to provide the machine base 13 above the hoistway 1. On the other hand, in this Embodiment 2, since such an operation | work becomes unnecessary, repair work becomes simpler. Furthermore, since the width of each of the machine base 18 and the support beam 19 is shorter than the width of the machine base 13 in the first embodiment, operations such as transportation, carrying-in, and attachment of these members are easy.

If the jack rail 10 has a small cross section and the jack rail 10 cannot support the downward load of the drive device 14, the existing jack rail 10 may be replaced with a jack rail having a larger cross section in advance. That's fine.

Further, when the positions of the upper and lower ends of the jack rail 10 are shifted from the desired positions and the ball screw driving device 17 cannot be installed well, the upper and lower ends of the jack rail 10 are cut in advance or The lowermost jack rail 10 may be replaced with one having an appropriate length.

As mentioned above, the elevator in this Embodiment 2 becomes a structure by which a drive device is supported by the machine stand provided in the end of the jack rail instead of the upper part of a hoistway with respect to the structure of previous Embodiment 1. FIG. ing. As a result, the same effects as those of the first embodiment can be obtained, and the repair work can be further facilitated.

In the first embodiment and the second embodiment, the case where the present invention is applied to the hydraulic elevator having a structure in which the car 2 is hung at the end of the rope 7 is illustrated, but the present invention is not limited to this, and the lower part of the car is not limited thereto. The present invention can also be applied to a hydraulic elevator having a structure in which a suspension car is provided to suspend a car.

1 hoistway, 1a pit surface, 2 cages, 3 hydraulic jacks, 4 cylinders, 5 plungers, 6 sled wheels, 7 ropes, 8 cage side rope clamps, 9 hoistway side rope clamps, 10 jack rails, 11 support frames, 12 machines Support member for table, 13 machine table, 14 drive device, 15 screw rod, 16 ball nut, 17 ball screw drive device, 18 machine table, 19 support beam.

Claims

A hydraulic jack having a cylinder and a plunger that moves in a vertical direction with respect to the cylinder, and the cage is configured to move in the vertical direction by moving the plunger in the vertical direction by hydraulic pressure; An elevator obtained by renovating the hydraulic elevator of
A fixing member provided on the plunger;
A movable member fixed to the fixed member;
A screw rod meshing with the movable member;
A driving device for moving the plunger in the vertical direction by moving the movable member in the vertical direction by rotating the screw rod;
Elevator equipped with.
The elevator according to claim 1, further comprising a machine base provided at an upper part of the hoistway and supporting the driving device.
The hydraulic elevator further includes a pair of jack rails that guide the vertical movement of the plunger,
The elevator according to claim 1, further comprising a machine base that is provided at one end of the jack rail and supports the driving device.
The elevator according to claim 3, further comprising a support member provided between the other end of the jack rail and the cylinder so that the cylinder supports a load of the driving device.
A hydraulic jack having a cylinder and a plunger that moves in a vertical direction relative to the cylinder is provided, and the existing hydraulic elevator in which a car moves in the vertical direction is repaired by moving the plunger in the vertical direction by hydraulic pressure. A method,
Providing a fixed member on the plunger and fixing a movable member meshing with a screw rod to the fixed member;
Installing a driving device in the hoistway for moving the movable member in the vertical direction by rotating the screw rod and moving the plunger in the vertical direction;
Removing the oil from the hydraulic jack;
Renovation method for hydraulic elevator equipped with