JPH0395096A - Handrail inspecting device for passenger conveyor - Google Patents

Abstract

PURPOSE:To judge if the rear surface condition is acceptable while a handrail is left running by displaying the acceptability of the facial condition of the handrail rear surface according to whether the amount of reflex light from the handrail rear surface is greater or smaller than the reference value. CONSTITUTION:The inspection light from an amplifier part 1 is cast onto the rear surface of a traveling handrail 4 from a photoelectric sensor 2, and the light reflected by the rear surface of the rail 4 passes an optical fiber 3 and is sent to a conversion part 5 of the amplifier part 1, and is converted into electrical signals corresponding to the amount of reflex light. When the surface of the rail 4 is normal, the amount of the reflex light exceeds the set reference light amount, while the amount of reflect light becomes lower than the reference light amount if the rear surface of the rail 4 is abnormal. When this amount of reflex light is below the reference light amount, a transistor 6 operates, and a signal 'yes' is emitted from output terminals 11, 11A of the amplifier part 1 to gether with providing of the electrically leading condition. Now a DC voltage is impressed on No.1 display device 12, which is thus operated, when it can be known that the part passing by the photoelectric sensor 2 includes a failure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for inspecting the back side of a handrail of a passenger conveyor. [Prior art] As a conventional device of this type,
As stated in the bulletin, an inspection window is installed in the shield that surrounds the return side of the handrail, and when necessary, the condition of the front side of the handrail can be inspected by looking through the inspection window at the back of the running handrail. What has been done is known.

[Problem to be solved by the invention]

However, the deck part is not located directly above the handrail, and even if an inspection window is provided, the position is diagonally upward, making it difficult to visually observe the back side of the handrail through the inspection window. In addition, since the handrail moves at a speed of 30 meters per minute on a general escalator, while driving the escalator, while passing through the inspection window, the condition of the back side of the escalator must be visually inspected and judged to be good or bad. That's difficult. An object of the present invention is to provide a handrail inspection device for a passenger conveyor that can accurately determine whether the condition of the back side of the handrail is good or bad while running the handrail.

[Means to solve the problem]

The above purpose is to use a photoelectric sensor installed opposite to the back side of the handrail and separated from a predetermined distance, an optical fiber connected to this photoelectric sensor, and a photoelectric sensor that emits light and is installed on the handrail when inspecting the handrail. This is achieved by comprising an amplifier section that detects the reflected light from the back surface and generates an output signal depending on the magnitude of the reflected light with respect to a preset value, and a display device that displays the presence or absence of the output signal of the amplifier section. Ru.

[Effect]

With the above structure, the light from the amplifier section passes through the optical fiber and is projected from the photoelectric sensor toward the back of the handrail, and the light projected directly in front of the handrail is reflected.
It passes through the optical fiber and reaches the amplifier section, where the amount of reflected light is detected. When the amount of reflected light does not reach a preset value, it outputs a "high" signal, indicating that the back of the handrail is now in a normal state. , If the amount of reflected light is large and there is an abnormal condition, for example, if the back surface is peeled off, there is a crack in the running direction, or there is a local cut, the amount of reflected light will decrease, so the output signal of the amplifier section will decrease. is "low" when the back surface is in a normal state, and "high" when the back surface is in an abnormal state, allowing accurate and quick knowledge of the abnormal state on the back surface.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3.

As shown in FIG. 1, an inspection device according to an embodiment of the present invention includes a photoelectric sensor 2, an optical fiber 3 connected to the photoelectric sensor 2, and a light emitting section, and converts an optical signal into an electrical signal. It has a conversion section 5, a transistor 6, and diodes 7 and 9,
an amplifier unit 1 that outputs a “high” signal when the amount of received (reflected) light is less than a preset amount of light (adjustable);
A first display device 12 (
or a second display device) and the DC power supply 14. As the first display device l2, a lamp or a buzzer is used, and as the second display device, a printer that can display the output signal from the amplifier section as a line graph is used.

Both of the first and second display devices 1-2.13 may be connected, or only one of them may be connected6.Furthermore, two sets of photoelectric sensors, amplifier units, etc. as shown in FIG. However, only one set is shown.

Next, the mounting position of the photoelectric sensor will be explained with reference to FIGS. 2 and 3.

In these figures, 4 indicates a handrail, 15 indicates a handrail support roller, 16 indicates a skirt guard, 7 indicates a handrail guide roller, and 18 indicates a guide roller bracket. It is located near the boundary where the area transitions from the area to the horizontal area. Further, the direction of the photoelectric sensor 2 is perpendicular to the back surface 4A of the handrail 4, and is spaced a predetermined distance from the back surface.
Two pieces are lined up in the width direction of the handrail 4 and attached to the skirt guard bracket 19.

The photoelectric sensor 2 is installed at a location below the upper entrance.

In addition, the escalator is equipped with a plurality of steps connected in an endless manner that run between the entrances on the upper and lower floors, handrails erected on both sides of the steps, and a drive device for the steps and hunt rail 4, etc. It is omitted in the figure.

Next, the procedure for inspecting the condition of the back side of the handrail 4 will be explained.

When performing an inspection, the photoelectric sensor 2 is attached to the above-mentioned position, and then the escalator is operated and the power of the inspection device is turned on. Then, the inspection light from the amplifier section 1 passes through the optical fiber 3 and is projected onto the back surface of the handrail 4 running from the photoelectric sensor 1. A part of the projected inspection light is reflected depending on the surface condition of the back surface of the handrail 4.

In other words, if the surface condition of the back surface of the handrail 4 is normal, the amount of reflected light will increase, and the surface portion of the back surface of the handrail 4 may peel off, be locally cut, or crack, resulting in an abnormal state. If so, the amount of reflected light will decrease. The light reflected on the back surface of the handrail 4 is sent to the conversion section 5 of the amplifier section 1 through the optical fiber 3, and is converted into an electrical signal corresponding to the amount of reflected light.When the surface of the handrail 4 is normal, the light is reflected. If the light amount is equal to or higher than a preset reference light amount (which can be adjusted based on the lower limit light amount at which the back surface of the handrail 4 is normal), and the back surface of the handrail 4 is abnormal, the reflected light amount will be less than the reference light amount. When the amount of reflected light is less than the reference amount of light, the transistor 6 operates, and a "high" signal is output from the output terminal 11, IIA of the amplifier section, resulting in a conductive state, and a DC voltage is applied to the first display device 12. , the first display device 2 operates (lights up in the case of a lamp, sounds in the case of a buzzer). This indicates that there is an abnormality at the location where the photoelectric sensor 2 passes when the first display device 12 operates.

Furthermore, the presence or absence of an abnormality directly in front of the handrail 4 can be plotted on a graph using the second display device 3.

〔Effect of the invention〕

As described above, according to the present invention, the quality of the surface condition of the back side of the handrail is displayed based on the magnitude of the amount of light reflected from the back side of the handrail with respect to the reference value, so inspection can be performed while the handrail is running. It is possible to determine the quality of the surface condition much more accurately and quickly than by visual inspection.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIGS. 2 and 3 are explanatory diagrams of an installed state. 1... Amplifier section, 2... Photoelectric sensor section, 3... Optical fiber cable, 4... Handrail, l2...
No. 1 display device, 14...DC power supply. Fig. 2 Fig. 1 No. I5 Fig. 3 3

Claims (1)

[Claims] (1) A plurality of steps are connected in an endless manner and run between the two entrances, and a handrail is erected on both sides of these steps. In a handrail inspection device for a passenger conveyor, which includes a handrail that runs at approximately the same speed as the step, and a drive device for running the step and the handrail, when inspecting the handrail, a handrail that faces the back side of the handrail is installed. , and a photoelectric sensor installed at a predetermined distance, an optical fiber connected to the photoelectric sensor, which emits light and detects reflected light from the back side of the handrail,
Handrail inspection of a passenger conveyor, characterized in that it is equipped with an amplifier section that generates an output signal depending on the magnitude of the reflected light with respect to a preset value, and a display device that displays the presence or absence of the output signal of the amplifier section. Device.