JP6758461B2 - How to repair a machine roomless elevator - Google Patents

Description

The present invention relates to a method for repairing a machine roomless elevator.

In the conventional elevator repair method, a car suspension wheel is attached to the upper part of the existing car, and a balance weight suspension wheel is attached to the upper part of the existing balance weight. In addition, the hoisting machine will be removed from the machine stand installed in the machine room. Then, a new hoist and end bracket are installed on the machine base. After that, the main rope is wound around the hoisting machine, the car suspension wheel, and the balance weight suspension wheel, and both ends of the main rope are connected to the end brackets (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-220078

In the renovation of the type of elevator having a machine room as described above, since a new hoisting machine is installed on the existing machine base, it is relatively easy to change the mounting dimensions and the external dimensions of the hoisting machine. On the other hand, in the conventional machine room-less elevator, there are strict restrictions on the dimensions in the hoistway, so the hoisting machine with the same mounting dimensions and external dimensions as the hoisting machine before the repair is placed in the same position as before the repair. It was installed. In addition, when installing a hoisting machine whose mounting dimensions and external dimensions are different from those before the repair, the repair work period was considerably long because all the equipment in the hoistway was removed and newly installed.

The present invention has been made to solve the above-mentioned problems, and it is possible to install a hoisting machine whose mounting dimensions and external dimensions are different from those before the repair while diverting many devices. The purpose is to obtain a method for repairing less elevators.

The method for repairing the machine room-less elevator according to the present invention includes a step of removing an existing hoisting machine installed at the lower part of the hoistway, a step of installing a new return wheel at the lower part of the hoistway, and a hoistway. Includes the process of installing a new hoist at the top of the interior.

In the method for repairing a machine roomless elevator of the present invention, it is possible to install a hoisting machine whose mounting dimensions and external dimensions are different from those before the repair while diverting many devices.

It is a schematic plan view which shows the machine room-less elevator before the repair by Embodiment 1 of this invention. It is a schematic front view which shows the machine room-less elevator of FIG. It is a schematic perspective view which shows the support structure of the car return wheel and the balance weight return wheel of FIG. It is a schematic plan view which shows the state after the repair of the machine room-less elevator of FIG. It is a schematic front view which shows the machine room-less elevator of FIG. It is a schematic perspective view which shows the support structure of the hoisting machine of FIG. It is a perspective view which shows the modification of the support structure of the hoisting machine of FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1.
FIG. 1 is a schematic plan view showing a machine room-less elevator before the repair according to the first embodiment of the present invention, and FIG. 2 is a schematic front view showing the machine room-less elevator of FIG. In the figure, the car 1 and the counterweight 2 are suspended in the hoistway 4 by a suspension body 3 (omitted in FIG. 1). As the suspension body 3, a plurality of ropes or a plurality of belts are used.

The counterweight 2 is arranged behind the car 1 when viewed from the landing so as to face the back surface of the car 1 when it is located at the same height as the car 1. Further, the balance weight 2 is arranged so as to be closer to one side (right side in FIG. 1) with respect to the center in the width direction (left-right direction in FIG. 1) of the car 1 when viewed from directly above.

At the lower part (pit) in the hoistway 4, an existing hoisting machine 5 is installed. The hoisting machine 5 raises and lowers the car 1 and the balance weight 2 via the suspension body 3. Further, the hoisting machine 5 has a hoisting machine main body 6 and a drive sheave 7. The hoisting machine main body 6 has a motor for rotating the drive sheave 7 and a brake for braking the rotation of the drive sheave 7. The suspension body 3 is wound around the drive sheave 7.

Further, as the hoisting machine 5, a body length hoisting machine whose axial dimension is larger than the dimension in the direction perpendicular to the axial direction is used. Furthermore, the hoisting machine 5 is arranged so that its axis is inclined with respect to the center line in the width direction of the car 1 when viewed from directly above.

The hoisting machine 5 is arranged directly below the corner on the side opposite to the side where the counterweight 2 at the rear of the car 1 is gathered so that most of the hoisting machine 5 overlaps with the car 1. .. However, the drawer portion of the suspension body 3 of the drive sheave 7 does not overlap with the car 1 when viewed from directly above.

In the hoistway 4, the first and second car guide rails 8a and 8b for guiding the elevating of the car 1 and the first and second balancing weight guide rails 9a for guiding the elevating and lowering of the balancing weight 2 are provided. 9b and are installed. The car guide rails 8a and 8b are arranged on both sides of the car 1 at an intermediate portion in the front-rear direction (vertical direction in FIG. 1) of the car 1.

The first and second car suspension wheels 11a and 11b are provided in the lower part of the car 1. A counterweight suspension wheel 12 is provided above the counterweight weight 2. The car suspension wheels 11a and 11b and the counterweight suspension wheel 12 are arranged so that their rotation axes are horizontal and perpendicular to the width direction of the car 1.

An upper support 13 (omitted in FIG. 1) is installed on the upper part (top) in the hoistway 4. The upper support 13 is supported by the car guide rails 8a and 8b and the balance weight guide rails 9a and 9b. The upper support body 13 supports a car return vehicle 14 as an upper return vehicle and a balance weight return vehicle 15.

The car return vehicle 14 is arranged between the drive sheave 7 and the second car suspension vehicle 11b when viewed from directly above. Further, the car return wheel 14 is arranged so that its rotation axis is horizontal and parallel to the width direction of the car 1.

The counterweight return wheel 15 is arranged between the drive sheave 7 and the counterweight suspension wheel 12 when viewed from directly above. Further, the counterweight return wheel 15 is arranged so that its rotation axis is horizontal and perpendicular to the width direction of the car 1.

A car side rope stopper (not shown) is provided in the vicinity of the car guide rail 8a of the upper support 13. The first end of the suspension body 3 is connected to the car side rope stopper. A balance weight side rope stopper 16 is provided at a portion of the upper support 13 between the balance weight return wheel 15 and the balance weight guide rail 9a. The second end of the suspension body 3 is connected to the balance weight side rope stopper 16.

The suspension body 3 is, in order from the first end side, the first car suspension wheel 11a, the second car suspension wheel 11b, the return wheel 14, the drive sheave 7, the balance weight return wheel 15, and the balance weight suspension. It is wrapped around the car 12. That is, the elevators of FIGS. 1 and 2 are 2: 1 roping type elevators.

FIG. 3 is a schematic perspective view showing a support structure of the car return wheel 14 and the counterweight return wheel 15 of FIG. The car return wheel 14 is arranged below the upper support 13 in the vicinity of the car guide rail 8b. The upper support 13 has first and second return beams 17a and 17b arranged at intervals from each other. The return beams 17a and 17b are arranged parallel to and horizontally in the width direction of the car 1. The counterweight return wheel 15 is arranged between the return beam 17a and 17b.

Next, a method of repairing the existing machine roomless elevator as described above will be described. FIG. 4 is a schematic plan view showing a state after the repair of the machine room-less elevator of FIG. 1, and FIG. 5 is a schematic front view showing the machine room-less elevator of FIG. In the repair method of the first embodiment, the counterweight return wheel 15 is removed from the upper support 13, and a new hoist (upper hoist) is installed at the position where the counterweight return wheel 15 of the upper support 13 is attached. Machine) 21 is installed.

Further, the drive sheave 7 of the lower hoisting machine (lower hoisting machine) 5 of the hoistway 4 is used as a lower return wheel of the elevator after repair. Further, the coil portion is removed from the hoisting machine 5 at the lower part of the hoistway 4 to eliminate the magnetic resistance to the rotation of the drive sheave 7. That is, in the elevator after the repair, the hoisting machine 5 does not generate a driving force and is used only as a lower return wheel. Then, the car 1 and the balance weight 2 move up and down by the driving force of the new hoisting machine 21.

The new hoisting machine 21 is a thin hoisting machine whose axial dimension is smaller than the dimension perpendicular to the axial direction. Further, the new hoisting machine 21 has a hoisting machine main body 22 and a drive sheave 23. The hoisting machine main body 22 has a motor for rotating the drive sheave 23 and a brake for braking the rotation of the drive sheave 23. The hoisting machine 21 is arranged so that the rotation axis of the drive sheave 23 is horizontal and perpendicular to the width direction of the car 1.

The suspension body 3 is, in order from the first end side, the first car suspension wheel 11a, the second car suspension wheel 11b, the car return wheel 14, the drive sheave (lower return wheel) 7, and the new hoisting machine 21. It is wound around the drive sheave 23 and the counterweight suspension wheel 12. That is, the elevators of FIGS. 4 and 5 are also 2: 1 roping type elevators.

FIG. 6 is a schematic perspective view showing the support structure of the hoisting machine 21 of FIG. The hoisting machine main body 22 is supported on the second return beam 17b, and the drive sheave 23 is arranged directly above the space between the return beams 17a and 17b. As a result, the portion of the suspension body 3 that goes downward from the drive sheave 23 passes through the space between the return beams 17a and 17b. Other configurations are the same as before the refurbishment, but may be replaced with new equipment if necessary.

In such a method of repairing the machine roomless elevator, a new hoisting machine 21 is installed at the position where the balance weight return wheel 15 is arranged in the upper part of the hoistway 4, so that many devices can be diverted. , The hoisting machine 21 whose mounting dimensions and external dimensions are different from those before the repair can be installed. As a result, the repair work period can be shortened while using the latest hoisting machine 21.

Further, since the hoisting machine 21 can be arranged in the upper part of the hoistway 4, the hoisting machine 21 will not get wet even if the pit is flooded.

Further, since the drive sheave 7 of the existing hoisting machine 5 is used as the lower return wheel of the elevator after the repair, the drive sheave 7 can be left as it is even after the power of the hoisting machine 5 is turned off, and waste is generated. It can be reduced.

Furthermore, since the coil portion of the existing hoisting machine 5 is removed to eliminate the resistance, an extra load is not applied even if the drive sheave 7 is used as a lower return wheel.

Further, since the thin hoisting machine is used as the new hoisting machine 21, the hoisting machine 21 can be easily installed in the space where the balance weight return wheel 15 is installed.

In FIG. 6, the hoisting machine 21 is directly installed on the return beam 17b. For example, as shown in FIG. 7, a pair of hoisting machines 24a and 24b are erected between the return beams 17a and 17b. Then, the hoisting machine 21 may be installed on the hoisting machine bases 24a and 24b. That is, the hoisting machine 21 may be installed on the return beams 17a and 17b via the hoisting machine bases 24a and 24b. In this case, the load applied to the hoisting machine 21 can be dispersed and acted on the return beams 17a and 17b, and the stress generated on the return beams 17a and 17b can be made close to that before the repair.

Further, in the above example, the hoisting machine 21 is installed so that the drive sheave 23 faces the car 1 side, but the drive sheave 23 faces the opposite side to the car 1, that is, the hoisting machine main body. The hoisting machine 21 may be installed so that 22 faces the car 1 side. In this case, maintenance and inspection of the hoisting machine main body 22 can be easily performed from above the car 1.

Further, in the above example, the balanced weight return wheel 15 is replaced with a new hoisting machine 21, but depending on the layout of the equipment arranged above the hoistway 4, the car return wheel 14 is replaced with a new hoisting machine. It may be exchanged for 21.
Furthermore, instead of using the drive sheave 7 of the existing hoisting machine 5 as a return wheel, the hoisting machine 5 may be removed and a new return wheel may be installed at the lower part of the hoistway 4.
Further, in the above example, the body length hoisting machine is shown as the existing hoisting machine 5, but the existing hoisting machine may be a thin hoisting machine.

1 basket, 2 balanced weight, 3 suspension, 4 hoistway, 5 existing hoist (lower hoist), 7 drive sheave (lower return wheel), 13 upper support, 15 balanced weight return wheel (1) Upper return wheel), 17a 1st return beam, 17b 2nd return beam, 21 new hoist (upper hoist), 24a, 24b hoist stand.

Claims (7)

The process of removing the existing hoisting machine installed at the bottom of the hoistway, and
The process of installing a new return wheel at the bottom of the hoistway and
A method of repairing a machine room-less elevator, which includes a process of installing a new hoist in the upper part of the hoistway. The process of installing a new hoisting machine in the hoistway without removing the existing hoisting machine installed in the hoistway.
The process of using the drive sheave of the existing hoisting machine as a return wheel, and
A method for repairing a machine room-less elevator, which includes a step of eliminating the driving force of the existing hoisting machine by removing the coil portion of the existing hoisting machine. The existing hoisting machine is installed at the lower part of the hoistway.
The method for repairing a machine room-less elevator according to claim 2, wherein the new hoisting machine is installed in the upper part of the hoistway. The process of installing a new hoisting machine in the upper part of the hoistway without removing the existing hoisting machine installed in the lower part of the hoistway.
A method for repairing a machine room-less elevator, which includes a process of using the existing hoisting machine as a return wheel. Further including the step of removing the upper return wheel from the upper support installed at the upper part in the hoistway.
The method for repairing a machine room-less elevator according to any one of claims 1 to 4, wherein the new hoisting machine is installed on the upper support. The process of removing the upper return wheel from the upper support installed at the upper part of the hoistway,
A process of installing a new hoist on the upper support without removing the existing hoist installed in the hoistway.
A method for repairing a machine room-less elevator, which includes a process of using the existing hoisting machine as a return wheel. The existing hoisting machine is a body length hoisting machine whose axial dimension is larger than the dimension perpendicular to the axial direction, or a thin hoisting machine whose axial dimension is smaller than the dimension in the direction perpendicular to the axial direction. Yes,
The machine room-less elevator according to any one of claims 1 to 6, wherein the new hoist is a thin hoist whose axial dimension is smaller than the dimension perpendicular to the axial direction. How to repair.

Images