JP2002037563A - Renewal method for hydraulic elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a renewal method for a hydraulic elevator, allowing the reduction of cost required for renewal by compatibly using components of the hydraulic elevator as components of a machinery-room elevator. SOLUTION: Merely by withdrawing a plunger rail 9 from tower components of the hydraulic elevator, renewal can be carried out using other components as they are. Therefore, labor and cost required for disassembly and withdrawing can be greatly reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for renewing a hydraulic elevator.

[0002]

2. Description of the Related Art An example of a general hydraulic elevator is described in Japanese Patent Application Laid-Open No. Hei 8-188357. As shown in FIG. 3, the hydraulic elevator has a plunger pulley 1 at its top and
A hydraulic plunger 2 that expands and contracts inside, a car 3 that moves up and down in the hoistway 20, and one end of which is attached to the car 3 and is wound around the plunger pulley 1 and the other end is the hoistway 20. And a main rope 4 attached near the bottom.
Is moved up and down by being guided by the main rail 5 in accordance with the expansion and contraction of the plunger 2. Further, the plunger 2 is provided with an oil feed pipe 8 from a power unit
Is guided by the plunger rail 9 and rises and falls by the pressurized oil discharged through.

In recent years, there has been a tendency to newly provide a machine room-less elevator as disclosed in Japanese Patent Application Laid-Open No. H11-130365 which does not provide a machine room in place of a hydraulic elevator. Since there is no need to provide a machine room in this elevator without a machine room, a great advantage is that the building occupancy of the elevator can be reduced.

[0004] When the above-mentioned hydraulic elevator is deteriorated over time, there is a great need for renewal in which it is desired to install the machine room-less elevator.

[0005]

However, as described above, a large number of large-sized components such as a hydraulic plunger are erected in a hoistway of a hydraulic elevator.
Disassembly and disassembly and then installation of the machine room-less elevator have a disadvantage that much labor and cost are required.

The present invention has been made in view of the above-mentioned disadvantages, and has as its object to provide a renewal method of a hydraulic elevator in which components of the hydraulic elevator are diverted as components of a machine room elevator to reduce the cost required for renewal. It is in.

[0007]

In order to achieve the above object, the present invention provides a hydraulic plunger having a plunger pulley at its top and extending and retracting in a hoistway, a riding platform for raising and lowering in the hoistway, A method of renewing a hydraulic elevator, comprising a main rope having one end attached to the car and being wound around the plunger pulley and the other end attached near the bottom of the hoistway. Stand up and engage with this counter rail to assemble the counterweight, install a traction machine near the bottom of the hoistway and install a top pulley near the top of the hoistway, and then connect the other end of the main rope to the The traction machine is wound around the top pulley and then attached to the counterweight.

According to the present invention, as described above, the main rope is roped using the plunger pulley between the traction machine and the car and the top pulley between the traction machine and the counterweight, so that the hydraulic plunger is removed and dismantled. Since the existing car and main rail can be used, the hydraulic elevator can be renewed to the machine room-less elevator at low cost.

According to the present invention, the plunger is held in the most extended state toward the top of the hoistway, and the main rope is wound around the plunger pulley in this state, so that the hydraulic elevator is raised and lowered. The elevating process can be ensured in the machine room-less elevator after the renewal.

Further, according to the present invention, the counterweight is provided with a counter pulley, and the other end of the main rope is wound around the counter pulley and then attached to the top of the hoistway. It is possible to do one roping and reduce the weight of the counterweight.

Further, according to the present invention, since the control panel for controlling the driving of the traction machine is arranged in the hoistway near the traction machine, all the devices are installed in the hoistway in the hoistway. And the building occupancy can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

First, a method of renewing a hydraulic elevator according to the present invention will be described with reference to FIGS. FIG. 1 is a schematic perspective view of a hoistway showing the entire configuration of a renewed elevator renewed by a method of renewing a hydraulic elevator according to the present invention, and FIG. 2 is a cross-sectional plan view taken along the line AA ′ of FIG.

In the method of renewing a hydraulic elevator according to the present invention, first, the plunger 2 is held by means such as welding while the plunger 2 is extended most toward the top of the hoistway 20.

Then, the plunger rail 9 is removed and carried out, the counter rail 10 is erected, and the counter weight 11 is engaged with the counter rail 10 to assemble the counter weight 11 provided with the pulley 14 on the upper part.

Next, the traction machine 12 is installed near the bottom of the hoistway 20, and the top pulley 13 is installed near the top of the hoistway 20 via the top beam 15 in combination with the plunger pulley 1.

Thereafter, one end of the main rope 4 is attached to a suspension plate 3a attached to the bottom of the car 3 and the other end is connected to the plunger pulley 1 and the traction machine 1.
2. The top pulley 13 and the counterweight 11
After being wound around the upper counter pulley 14, the main rope 4 is roped so as to be attached to the top beam 15. Further, the control panel 6 for controlling the driving of the traction machine 12 and the like is provided on the side wall of the hoistway 20, so that a machine room is not required.

Thus, according to the present invention, the main rope 4 is roped using the plunger pulley 1 between the traction machine 12 and the car 3 and the top pulley 13 between the traction machine 12 and the counterweight 13. Because the method is adopted, the hydraulic plunger 2 does not have to be removed and carried out, and the existing car 3 and main rail 5 can be used. Therefore, it is possible to renew the hydraulic elevator to the machine room-less elevator at low cost. .

Further, according to the present invention, since the plunger 2 is configured to remain after the renewal, the car 3 cannot rise above the plunger pulley 1 due to the structure, but it is welded in a state where it extends most toward the top of the hoistway 20. After holding the plunger 2 by such means as above, the main rope 4 is roped on the plunger pulley 1, so that the lifting / lowering process in which the hydraulic elevator has been raised / lowered before the renewal can be raised / lowered even after the renewal.

Further, according to the present invention, the counterweight 11 is provided with a counter pulley 14 and the main rope 4
The other end is wound around the counter pulley 14 and then mounted on the top beam 15 at the top of the hoistway 20, so that the hydraulic elevator can be renewed, so that two-to-one roping is possible and the weight of the counterweight 14 can be reduced.

Furthermore, according to the present invention, since the control panel 6 for controlling the driving of the traction machine 12 is disposed on the hoistway side wall near the traction machine 12, all the devices can be installed in the hoistway 20. And the building occupancy can be reduced.

Further, as shown in FIG. 2, since the components of the elevator after the renewal are arranged at positions where they do not interfere with each other, the elevator can be raised and lowered smoothly.

[0023]

As described above, according to the present invention, only the plunger rail is removed from the internal components of the conventional hydraulic elevator, and the other components can be used and renewed. Can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a hoistway showing an entire configuration of a renewed elevator renewed by a renewal method of a hydraulic elevator according to the present invention.

FIG. 2 is an AA ′ plane sectional view of FIG. 2;

FIG. 3 is a schematic perspective view showing the entire structure of a conventional hydraulic elevator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plunger pulley 2 Hydraulic plunger 3 Car 4 Main rope 5 Main rail 6 Control panel 7 Power unit 8 Oil feed pipe 9 Plunger rail 10 Counter rail 11 Counterweight 12 Traction machine 13 Top pulley 14 Counter pulley 15 Top beam 20 Hoistway

Claims (4)

[Claims] 1. A hydraulic plunger having a plunger pulley at its top and extending and retracting in a hoistway, a riding car for raising and lowering in the hoistway, one end of which is attached to the car and wound around the plunger pulley. A method for renewing a hydraulic elevator having a main rope attached to the hoistway bottom near the bottom of the hoistway after being hung, wherein a counterrail is erected on the hoistway and the counterweight is engaged with the counterrail to engage the counterrail. Assembly,
After installing a traction machine near the bottom of the hoistway and installing a top pulley near the top of the hoistway, the other end of the main rope was wound around the traction machine and the top pulley, and then attached to the counterweight. A method for renewing a hydraulic elevator. 2. The renewal method of a hydraulic elevator according to claim 1, wherein the plunger is held in the most extended state toward the top of the hoistway, and then the main rope is wound around the plunger pulley. 3. The counterweight according to claim 1, wherein a counter pulley is provided on the counterweight, and the other end of the main rope is wound around the counter pulley and then attached to the top of the hoistway. How to renew the hydraulic elevator. 4. The renewal method for a hydraulic elevator according to claim 1, wherein a control panel for controlling the driving of the traction machine is disposed in a hoistway near the traction machine.