JP3347070B2 - Repair method of hydraulic control device for hydraulic elevator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for repairing a hydraulic control device for a hydraulic elevator.

[0002]

2. Description of the Related Art In general, a hydraulic elevator is mainly constituted by a hydraulic jack driven by a hydraulic jack and a hydraulic control device for controlling the operation of the elevator car and the elevator car. A hydraulic power unit having a pump for supplying hydraulic oil to the hydraulic jack, a control panel for controlling the hydraulic power unit, and a tank for storing the hydraulic oil.

Conventionally, in this type of hydraulic elevator, since the pump discharge amount of the hydraulic power unit is constant, the speed of the car is controlled by controlling the flow rate of hydraulic oil only by the control valve. . For this reason, the time of traveling at low speed when the car is landing on the floor is long, and the time of so-called sloppy driving is relatively long.

In recent years, as one means for solving such a conventional problem, for example, an inverter control panel for controlling a discharge amount of a pump by inverter-controlling a motor of a hydraulic power unit has been put to practical use. For this reason, in a hydraulic elevator that has been operating for a long time, the hydraulic control device having the existing control panel is modified to the hydraulic control device having the inverter control panel.

[0005]

However, in the above-mentioned conventional method of repairing a hydraulic control device, the entire hydraulic control device needs to be replaced because the hydraulic power unit and the control panel need to be replaced. In addition, the period of the renovation work is long and there is a problem that users of the hydraulic elevator are considerably troublesome.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances in the prior art, and has as its object the purpose of shortening the low-speed traveling time at the time of landing on a car to improve the traveling performance, and at the same time, reducing the cost. Another object of the present invention is to provide a method of repairing a hydraulic elevator hydraulic control device capable of completing construction in a short period of time.

[0007]

In order to achieve the above object, the present invention provides a hydraulic power unit for supplying hydraulic oil to a hydraulic jack for driving a car, a control panel for controlling the hydraulic power unit, in renovation method of the hydraulic control device for a hydraulic elevator having a tank for storing oil, together with the hydraulic power unit and the tank leave the existing product, after removal of the control panel, providing a new microcomputer control panel, the Works on tank
A sensor for measuring the oil temperature of the oil, the hydraulic power unit
Mount the new sensor for measuring the pressure in takes a measurement signal output from the sensor to the microcomputer control panel, are the configuration for controlling the hydraulic power unit in the microcomputer control panel.

According to the present invention having the above-described structure, a new microcomputer control panel is provided, and the oil temperature and pressure of the working oil, which change depending on the use environment, are measured by sensors and used as control data by the microcomputer control panel. In addition to reducing the low-speed traveling time at the time of landing on the car, the traveling performance can be improved, and the hydraulic power unit and the tank are left as they are, which means that the entire hydraulic control device does not need to be replaced, so that the comparatively low Renovation work can be completed at a price and in a short period of time.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a method for repairing a hydraulic control device for a hydraulic elevator according to the present invention. FIG. 1 is a perspective view of a hydraulic control device for a hydraulic elevator modified by a modification method according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a mounting portion of an oil temperature sensor used in the present embodiment, and FIG. FIG. 4 is a perspective view showing a mounting portion of a hydraulic sensor used in the present embodiment, FIG. 4 is a flowchart showing an operation procedure of the present embodiment, and FIG. 5 is a speed characteristic diagram of a car for explaining a repair result according to the present embodiment.

The hydraulic control device 1 shown in FIG. 1 comprises an existing hydraulic power unit 2, a new microcomputer control panel 3 provided on the existing hydraulic power unit 2, and an existing tank 4 for storing hydraulic oil. ing.

The existing hydraulic power unit 2 includes a pump 2a for supplying hydraulic oil to a hydraulic jack (not shown), a motor 2b for driving the pump 2a, a control valve 2c for controlling the flow rate of hydraulic oil, and a safety valve. A stop valve 2d as a device;
Pressure gauge 2e for displaying the pressure in the hydraulic power unit 2
And a muffler 2f for suppressing pressure pulsation, all of which are existing.

An oil temperature sensor 5 for measuring the oil temperature is provided below the tank 4, and an oil temperature sensor 6 for measuring the pressure in the hydraulic power unit 2 is provided between the stop valve 2d and the pressure gauge 2e. Are provided, and these sensors 5 and 6 are new products.

As shown in FIG. 2, the oil temperature sensor 5 has a pipe tapered male thread 5a at the tip and is connected to the lower part of the tank 4 via a drain port 7 having a pipe tapered female thread 7a. ing. The drain port 7 is sealed at the time of installation and is used when the tank 4 is not used.
Since the oil temperature sensor 5 is provided at the lower portion, when the oil temperature sensor 5 is attached to the drain port 7, processing of the existing tank 4 is unnecessary,
Installation is easy.

The pressure sensor 6 has a pipe tapered male thread at the tip (not shown), and is connected to a stop valve 2d via a T-shaped pipe joint 8 and a pipe joint 9, as shown in FIG. In this connection, processing of the hydraulic power unit 2 is not required at the time of this connection, and mounting is easy. The T-shaped pipe joint 8 has a tapered female thread (not shown) at the pipe end, the pipe joint 9 has a tapered male thread (not shown) at both ends, and a pressure gauge 2 e is provided at one end of the T-shaped pipe joint 8. Is connected.

In the repair method of the present embodiment, an existing hydraulic control device (not shown) is modified to the hydraulic control device 1 of FIG. 1 in accordance with the operation procedure of FIG. That is, after removing an existing control panel (not shown) in step S1, a new microcomputer control panel 3 is attached in step S2. Next, in step S3, the oil temperature sensor 5 and the pressure sensor 6 are respectively attached. In step S4, necessary wiring work, for example, wiring for taking in the output from each sensor 5, 6 to the microcomputer control panel 3, and the existing motor The wiring work to the control valve 2b and the control valve 2c is performed, and finally, the test operation of the hydraulic control device 1 is performed as a procedure S5 to complete the repair work.

In this embodiment constructed as above, the hydraulic power unit 2 and the tank 4 are left as they are, and the microcomputer control panel 3 and the sensors 5 and 6 are newly provided. The renovation work can be completed at a relatively low price and in a short period of time.

In the present embodiment, the microcomputer control panel 3
In addition to the above, the oil temperature and pressure of the hydraulic oil, which changes depending on the use environment, are measured by the sensors 5 and 6 and are used as control data by the microcomputer control panel 3, thereby shortening the low-speed traveling time when the car (not shown) arrives on the floor. Driving performance can be improved.

In FIG. 5, the speed curve 1 of the car is shown.
0 indicates the relationship between the speed and the time of the car of the existing hydraulic elevator, and includes a low-speed running (so-called sloppy running) time 10a at the time of landing. Further, another speed curve 11 shows the relationship between the speed and the time of the car when operated by the hydraulic control device 1 after the repair shown in FIG. 1, and includes the low speed traveling time 11a at the time of landing. As is clear from the comparison of these speed curves 10 and 11, the oil temperature and pressure that change depending on the usage environment are
By taking in as control data of the control valve 2c, the deceleration position from the rated speed can be delayed,
As a result, the low-speed landing traveling time 10a before the repair is reduced to the low-speed landing traveling time 11a after the repair, and the traveling performance of the car can be greatly improved.

[0019]

As described above, according to the present invention,
By installing a new microcomputer control panel, it is possible to improve the running performance by shortening the low-speed running time at the time of landing on the car, and it is not necessary to replace the entire hydraulic control device, so at a relatively low price, and Renovation work can be completed in a short period of time.

[Brief description of the drawings]

FIG. 1 is a perspective view of a hydraulic elevator hydraulic control device modified by a modification method according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a mounting portion of an oil temperature sensor used in the embodiment.

FIG. 3 is a perspective view showing a mounting portion of a hydraulic sensor used in the embodiment.

FIG. 4 is a flowchart illustrating a work procedure according to the embodiment.

FIG. 5 is a speed characteristic diagram of a car for explaining a repair result according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydraulic control device 2 Hydraulic power unit 3 Control panel 4 Tank 5 Oil temperature sensor 6 Pressure sensor 8 T-type fitting 9 Fitting

────────────────────────────────────────────────── ─── Continuation of the front page (72) Takashi Hayashi 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside the Hitachi Building System Co., Ltd. (56) References JP-A-4-140292 (JP, A) JP-A-6 −255907 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B66B ^7/ 00-9/193

Claims (2)

(57) [Claims] 1. A hydraulic elevator for a hydraulic elevator having a hydraulic power unit for supplying hydraulic oil to a hydraulic jack for driving a car, a control panel for controlling the hydraulic power unit, and a tank for storing the hydraulic oil. In the method, after removing the control panel while leaving the hydraulic power unit and the tank as existing products, providing a new microcomputer control panel and operating the tank
A sensor for measuring the oil temperature of the oil, the hydraulic power unit
Mount the new sensor for measuring the pressure, the hydraulic elevator, characterized in that the measurement signal output from the sensor incorporated into the microcomputer control panel, to control the hydraulic power unit in the microcomputer control panel Repair method of hydraulic control device. 2. An oil temperature sensor provided in the tank.
2. A drain port connected to the drain port.
The repair method of the hydraulic control device for a hydraulic elevator according to the above.