JPH08268660A - Automatic tension measuring device for rope of elevator - Google Patents

Abstract

PURPOSE: To provide an automatic tension measuring device for a rope of an elevator whereby tension of a main rope can be easily measured in a short time with the elevator left as operated. CONSTITUTION: A device is constituted by providing a displacement sensor main unit 7 provided with a plurality of displacement sensors set up in a base stand of a hoist machine respectively corresponding to a plurality of main ropes 1 to respectively measure displacement at amplitude time of the main rope 1 and an amplitude frequency analyzing display device 8 connected respectively to the displacement sensor to analyze displacement of the main rope 1 output from each displacement sensor further to display an amplitude frequency of the main rope 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator rope automatic tension measuring device capable of automatically measuring the tension of a main rope of an elevator while the elevator is operating.

[0002]

2. Description of the Related Art In recent years, there are many skyscrapers constructed nationwide, and it is expected that the number of houses and offices will increase more and more particularly on the 20th floor and above. Among them, the elevator plays an extremely important role as an important vertical transportation.

Therefore, when the main rope for suspending the car has uneven tension, the riding comfort becomes poor, or when the main rope or the sheave around which the main rope is wound is worn and forced to be replaced, Stopping the elevator for a long time may stall the activity of many users, so it is required to measure the tension of the main rope accurately in the shortest possible time.

4 and 5 show an example of a conventional example for measuring the tension of a main rope of an elevator. In the figures, reference numeral 1 has a car 2 suspended from one end and a counterweight 3 suspended from the other end. The main rope, which is installed and is wound around the sheave 5 of the hoisting machine 4 installed in the rooftop machine room, elevates and lowers the car 2 by power, and 6 is the car 2 and the counterweight 3, respectively. This is a compensator rope that is vertically installed to balance the weight when the car 2 moves up and down.

In such a structure, in order to measure the tension of the main rope 1, an operator rides on the car 2 and directly pulls each of the counterweight sides 1a of the main rope 1 by hand or a spring. Measure the tension of the main rope 1 directly by pulling it with a scale.

As another method, the car 2 is lowered to the lowest floor, and a worker rides on the car 2 to connect one end of the main rope 1 to the car 2 2a.
Is hit with a hammer and the amplitude frequency of the main rope 1 at that time is measured for a certain period of time. When the amplitude frequency is high, it is determined that the tension of the main rope 1 is strong, and when it is low, it is weak.

[0007]

Since the conventional method for measuring the main rope of the elevator is the method described above, it is necessary to suspend the operation of the elevator in any of the methods, and moreover, the operator cannot Since it is necessary to ride on the car 2 and carry out each of the main ropes 1 one by one, there is a problem that not only a lot of work time is required but also measurement is troublesome.

The present invention has been made to solve the above problems, and the tension of the main rope can be easily measured in a short time while the elevator is operating, and the rope automatic tension of the elevator can be easily measured. An object is to provide a measuring device.

[0009]

An automatic rope tension measuring device for an elevator according to claim 1 of the present invention is installed corresponding to a plurality of main ropes, respectively.
Displacement sensor main body provided with a plurality of displacement sensors for measuring the displacement of the main rope at the time of amplitude, respectively, connected to each of the displacement sensor, analyze the displacement output from this displacement sensor, And an amplitude frequency analysis display for displaying the amplitude frequency.

An elevator rope automatic tension measuring device according to a second aspect of the present invention is, in the preceding paragraph, connected to an amplitude frequency analysis display, and the amplitude of each main rope output from the amplitude frequency analysis display. It is configured with a recorder for recording the frequency over time.

[0011]

In the automatic rope tension measuring device for an elevator according to the first aspect of the present invention, the displacements of the main ropes are measured by the displacement sensors of the displacement sensor body, and the displacement of the main ropes is measured. The amplitude frequency analysis display is analyzed, and the amplitude frequency of each main rope is displayed on this amplitude frequency analysis display.

In the automatic rope tension measuring device for an elevator according to the second aspect of the present invention, in the preceding paragraph, the amplitude frequency of the main rope displayed on the amplitude frequency analysis display unit is measured for each main rope in the recorder. Recorded over time.

[0013]

【Example】

Example 1. 1 to 3 show an embodiment of an automatic rope tension measuring device for an elevator according to the present invention. In the drawings, the same parts as those of the conventional example are designated by the same reference numerals,
The description is omitted. Reference numeral 7 corresponds to each of the plurality of main ropes 1, is installed on the base 4a of the hoist 4, and a displacement sensor equipped with a plurality of displacement sensors 7a for measuring the displacement of each main rope 1 at the time of amplitude. The main body 8 is connected to each of the displacement sensors 7a via a connecting cord 9, and the displacement of each main rope 1 output from each displacement sensor 7a via the connecting cord 9 is analyzed by a computer, and each main rope is Amplitude frequency analysis display for displaying the amplitude frequency of 1 for each main rope, and reference numeral 10 is connected to this amplitude frequency analysis display 8 through a connection cord 11, and the connection code 11 is connected from the amplitude frequency analysis display 8 The recorder is a recorder for recording the amplitude frequency of each main rope 1 output via each of the main ropes over time.

In such a structure, the tension of the main ropes 1 is measured by operating the elevator and operating this device when the speed reaches a certain level, and the main ropes displayed on the amplitude / frequency analysis display 8 are displayed. Read the amplitude frequency of 1. Then, the main rope 1 having a large amplitude frequency within a fixed time and having a large number is used as a reference, and the main rope showing an amplitude frequency that is smaller than the reference main rope amplitude frequency and is considerably smaller has a weak tension and requires adjustment. . By the way,
If this value is larger than the reference value, the tension of the main rope is stronger than that of the other main ropes, and if it is smaller, the tension is judged to be weaker.

Example 2. In Example 1, the measurement is possible while driving the elevator, but the elevator is stopped with the car 2 being lowered to the lowest floor,
It is also possible to perform measurement by operating this device while forcibly giving vibration to the main rope 1 by hitting the socket portion of the main rope with a hammer.

[0016]

The automatic rope tension measuring device for an elevator according to the first aspect of the present invention is installed corresponding to each of a plurality of main ropes, and measures the displacement of the main ropes when they are in amplitude. A displacement sensor body equipped with a plurality of displacement sensors, and an amplitude that is connected to each of the displacement sensors, analyzes the displacement of each main rope output from this displacement sensor, and displays the amplitude frequency of each main rope. Since it is configured with a frequency analysis display, the displacement of each main rope is individually measured by each displacement sensor, the displacement of each main rope is analyzed by the amplitude frequency analysis display, and By displaying the amplitude frequency of each rope individually, the tension of the main rope can be easily measured in a short time while the elevator is operating. There is a result.

An elevator rope automatic tension measuring device according to a second aspect of the present invention is connected to an amplitude frequency analysis display, and records the amplitude frequency output from this amplitude frequency analysis display with time. Since it is equipped with a recorder, the tension of each main rope can be measured and recorded over time.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of an automatic rope tension measuring device for an elevator according to the present invention.

FIG. 2 is a side view of the hoist showing an installation state of the rope automatic tension measuring device for the elevator shown in FIG.

FIG. 3 is a front view of FIG.

FIG. 4 is a side view showing an example of a conventional example for measuring the tension of a main rope of an elevator.

FIG. 5 is a side view showing an example of a conventional example for measuring the tension of a main rope of an elevator.

[Explanation of symbols]

1 main rope, 4 hoist, 4a base, 7 displacement sensor body, 7a displacement sensor, 8 amplitude frequency analysis display, 10 recorder.

Claims (2)

[Claims] 1. A displacement sensor body provided with a plurality of displacement sensors respectively corresponding to a plurality of main ropes, the displacement sensor bodies measuring displacements of the main ropes at the time of amplitude, respectively.
Characterized by comprising an amplitude frequency analysis display connected to each of the displacement sensors, analyzing the displacement of the main rope output from the displacement sensor, and displaying the amplitude frequency of the main rope. Automatic rope tension measuring device for elevator. 2. A recorder, which is connected to the amplitude-frequency analysis display and records the amplitude frequency of the main rope output from the amplitude-frequency analysis display over time. The automatic rope tension measuring device for the elevator according to the paragraph.