JPS5848467B2 - Elevator guide rail bend detection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting bending of an elevator guide rail.

Recently, as buildings have become taller, the length of elevators installed has become longer, making it difficult to construct high-precision guide rails for guiding elevator cars, which often causes bends in the guide rails.

If the guide rail is bent, lateral vibrations may occur in the heel, or an error may occur in the detection output of the live load detection device.

Therefore, in order to carry out high-precision installation of guide rails, a guide rail bend detection device is required, but at present no practical guide rail bend detection device that can be used for this purpose has been developed.

Figure 1 is a schematic structural diagram of a common elevator elevator.
1 is a frame made of shaped steel assembled in a rectangular shape, 2 is a car floor support frame inserted into the frame 1 and fixed, and 3 is elastically supported by elastic bodies 9 to 12 attached to the four corners of the heel and floor support frame 2. The car is set up on a car floor 4, and there are guide rails 6 on the left and right, top and bottom of the frame 1 that engage guide rails 6 that guide the elevator 7 consisting of the frame 1, the car 3, etc. A section 5 is installed, and one end of a wire rope 8 is connected to the framework 1 to suspend the elevating body 7.

The bending of the guide rail 6 occurs during processing and installation of the guide rail 1. Conventionally, when modifying the installation of the guide rail 6, a reference line is suspended from the top of the guide rail 6, and this reference line is connected to the side of the guide rail 6. This has been done using either a method of visually comparing and a method of optically measuring the distance between the reference line and the side surface of the guide rail 6.

However, the visual method is simple but has poor accuracy.
Although the optical measurement method is highly accurate, it not only requires a facility with a dog at its disposal, but also requires a long time for measurement and is not suitable for on-site use.

The present invention has been made in view of the above, and an object thereof is to provide a simple and highly accurate method for detecting bending of an elevator guide rail.

A feature of the present invention is that it is equipped with a displacement measuring device that measures the amount of displacement of the car floor support frame fixed below the framework, and that the displacement measuring device measures the horizontal forced displacement of the guide section that engages with the guide rail. The main feature is that the vertical displacement of the corner of the car floor support frame is measured, and the bending of the guide rail is detected from the output.

The present invention will be explained in detail below using the embodiments shown in FIGS. 2, 3, and 4 to 7.

First, before explaining the embodiments of the present invention, let us first explain that the bending of the guide rail can be detected from the amount of displacement of the car floor support frame.
This will be explained using FIG.

2 and 3 are models of the framework 1 and the car floor support frame 2 in FIG. When forcedly displaced, as shown in FIGS. 2 and 3, if the forced displacement direction is in the direction of the arrow D or V, the car floor support frame 2 deforms as shown by the dotted lines.

That is, the car floor support frame 2 is arranged so that its diagonal points A and C and B and D move in the same direction, and the directions of movement of the diagonal points A and C and B and D are opposite to each other. transforms into

This deformation mode is the same even if the other guide portions 5 are forcibly displaced.

From this, it becomes clear that conversely, the deformation of the car floor support frame 2, that is, the bending of the guide rail 6 can be detected from the amount of displacement.

Next, the present invention will be explained using the embodiment shown in FIG.

FIG. 4 shows a model of the main parts of FIG. 1, and the same parts as in FIG. 1 are designated by the same reference numerals, and the explanation thereof will be omitted.

The difference from FIG. 1 is that any one of the elastic bodies 9 to 12 installed in the four corners between the car floor support frame 2 fixed to the framework 1 and the car floor 4 of the passenger seat 3 is used. In the embodiment, a displacement measuring device 13 of the car floor support frame 2 is installed near the elastic body 9.
It is located at the point where the is installed.

Since the displacement measuring device 13 can measure the displacement of the car floor support frame 2 with respect to the heel floor 3, a displacement detector such as a differential transformer can be used.

Furthermore, since a live load detection device is generally attached to the car 3, the displacement of the car floor support frame 2 may be measured from the output of this load detection device while keeping the load constant. By clarifying the relationship between the known forced displacement amount of the framework 1 and the output of the displacement measuring device 13, it is possible to easily and easily determine the bending direction and amount of the guide rail 6 from the output of the displacement measuring device 13. , can be detected with high precision.

5 to 7 show other embodiments of the present invention. In the embodiment shown in FIG.
Among the elastic bodies 9 to 12 attached to the corners, two elastic bodies are attached to both ends of an arbitrary side, elastic bodies 9 and 10 in FIG.
Displacement measuring devices 13 and 14 are installed near the.

In the embodiment shown in FIG. 6, displacement measuring devices 13 to 15 are installed near arbitrary three elastic bodies, respectively, in the vicinity of elastic bodies 9 to 11 in the embodiment.
is installed.

Further, in the embodiment shown in FIG. 7, displacement measuring devices 13 to 16 are installed near the four elastic bodies 9 to 12, respectively.

In this way, if the displacement measuring devices 13, 14, 13 to 15, or 13 to 16 are provided and the output of each displacement measuring device is used to detect the bending of the guide rail 6, it is possible to implement the method shown in FIG. Guide rail 6 with even higher precision than in the example case.
bends can be detected.

As explained above, according to the present invention, there is a remarkable effect that the bending of the guide rail can be detected easily and with high accuracy.

[Brief explanation of drawings]

Figure 1 is a schematic structural diagram of a general elevator elevator, and Figures 2 and 3 are model diagrams for explaining the deformation state of the car floor support frame due to forced displacement of the frame in Figure 1. , FIG. 4 is a model diagram for explaining one embodiment of the guide rail bend detection method of the present invention, and FIGS. 5 to 7 are model diagrams for explaining other embodiments of the present invention. 1...Framework, 2...Car floor support frame, 3
...Car, 4...Car floor, 5...
...Guide section, 6...Guidance rail, 8...
...Wire rope, 9-12...Elastic body, 13
~16... Displacement measuring device.

Claims (1)

[Claims] 1. A cross-shaped framework suspended by a rope, and guide portions provided at symmetrical positions above and below this framework and engaged with guide rails;
a flat square car floor support frame fixed below the framework;
In an elevator car equipped with a car having a rectangular car floor supported by the car floor support frame via an elastic body and arranged parallel to the car floor support frame, the car floor support frame and the car A displacement measuring device is installed near the corner between the car floor and the floor, and this displacement measuring device measures the vertical direction of the corner of the car floor support frame caused by forced horizontal displacement of the guide section due to the bending of the guide rail. A method for detecting bending of a guide rail for an elevator, characterized in that the bending of the guide rail is detected by measuring displacement and using the output of the displacement measuring device.