JP2582165B2 - Passenger conveyor handrail inspection device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for inspecting the back surface of a handrail of a passenger conveyor.

[Conventional technology]

Conventionally, as this type of device, as described in Japanese Utility Model Application Laid-Open No. 61-171789, an inspection window is provided in a shield surrounding the return side of the handrail, and an inspection window is provided on the back of the handrail traveling when necessary. There is known an apparatus in which the state of the back of a handrail is inspected while peeping from the side.

[Problems to be solved by the invention]

However, the deck portion is not located directly above the handrail, and even if an inspection window is provided, its position is obliquely upward, and it is difficult to visually check the back surface of the handrail through the inspection window. In general escalators, the handrail moves at 30 m / min. While driving the escalator, while passing the distance of the inspection window, it is necessary to visually inspect the condition of the back surface of the escalator and determine whether it is good or bad. Is difficult.

SUMMARY OF THE INVENTION An object of the present invention is to provide a handrail inspection device for a passenger conveyor that can accurately determine the state of the back surface of a handrail while running the handrail.

[Means for solving the problem]

The object of the present invention is to provide a photoelectric sensor installed at a predetermined distance away from the back surface of the handrail during inspection of the handrail, an optical fiber connected to the photoelectric sensor, An amplifier for detecting reflected light from the back surface and generating an output signal according to the magnitude of the reflected light with respect to a preset value; and a display device for displaying the presence or absence of an output signal of the amplifier. Achieved.

[Action]

With the above configuration, light from the amplifier section passes through the optical fiber and is emitted from the photoelectric sensor toward the back surface of the handrail. The light projected on the back of the handrail is reflected, reaches the amplifier through an optical fiber, where the amount of reflected light is detected. When the amount of reflected light does not reach a preset value, a "high" signal is output. If the back of the handrail is in a normal state, the amount of reflected light is large, and if the abnormal state is such as peeling of the back, cracking in the running direction, or local cutting, Is reduced, the output signal of the amplifier section is "low" when the back surface is in a normal state and "high" when the back surface is in an abnormal state, so that the abnormal state of the back surface can be accurately and quickly known.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

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

Both the first and second display devices 12 and 13 may be connected, or only one of them may be used. Although two sets of photoelectric sensors and amplifiers as shown in FIG. 1 are provided, only one set is shown.

Next, a mounting position of the photoelectric sensor will be described with reference to FIGS.

In these figures, 4 is a handrail, 15 is a handrail support roller, 16 is a skirt guard, 17 is a handrail guide roller, 18 is a guide roller bracket, and the photoelectric sensor 2 has a handrail from an inclined portion. It is located at a position near the boundary that transitions to the horizontal part. The direction of the photoelectric sensor 2 is perpendicular to the back surface 4A of the handrail 4 and is separated from the back surface by a predetermined distance. Two photoelectric sensors 2 are arranged in the width direction of the handrail 4 and attached to the skirt guard blanket 19. .

The mounting work of the photoelectric sensor 2 is performed at a position below the upper entrance.

In addition, the escalator is connected to a plurality of endless,
It includes a step for traveling between the upper and lower floor entrances, a balustrade stood up on both sides of the step, a step and a drive device for the handrail 4 and the like, but they are omitted in the figure.

Next, a procedure for checking the state of the back surface of the handrail 4 will be described.

When performing the inspection, the photoelectric sensor 2 is attached to the above-described position, and then the escalator is operated.
Turn on the power of the inspection device. Then, the inspection light from the amplifier unit 1 passes through the optical fiber 3 and is projected on the back surface of the handrail 4 traveling from the photoelectric sensor 1. A part of the projected inspection light is reflected according to the surface condition of the back surface of the handrail 4. That is, if the surface condition of the back surface of the handrail 4 is normal, the amount of reflected light increases, and the surface portion of the back surface of the handrail 4 peels off, is locally cut or cracked, and an abnormal state occurs. If so, the amount of reflected light decreases. The light reflected on the back surface of the handrail 4 is sent to the conversion unit 5 of the amplifier unit 1 through the optical fiber 3 and is converted into an electric signal corresponding to the amount of reflected light. The light amount is equal to or larger than a preset reference light amount (which can be adjusted based on the lower limit light amount in which the back surface of the handrail 4 is normal), and if the back surface of the handrail 4 is abnormal, the reflected light amount is lower than the reference light amount. When the amount of reflected light falls below the reference amount of light, the transistor 6 operates, a "high" signal is output from the output terminals 11 and 11A of the amplifier unit 1 and the transistor 6 is turned on, and a DC voltage is applied to the first display device 12. Then, the first display device 12 operates (lights up for a lamp and sounds for a buzzer). Thus, it can be seen that there is an abnormality in a portion that has passed the photoelectric sensor 2 when the first display device 12 is operating.

In addition, the second display device 13 allows the presence or absence of an abnormality on the back surface of the handrail 4 to be plotted on a graph.

〔The invention's effect〕

As described above, according to the present invention, the quality of the surface condition of the back surface of the handrail is displayed based on the magnitude of the amount of reflected light from the back surface of the handrail based on the reference value. Inspection can be performed, and the quality of the surface condition can be grasped much more accurately and quickly than in the case of visual inspection.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of one embodiment of the present invention, and FIGS. 2 and 3 are explanatory views of an attached state. DESCRIPTION OF SYMBOLS 1 ... Amplifier part, 2 ... Photoelectric sensor part, 3 ... Optical fiber cable, 4 ... Handrail, 12 ... 1st display apparatus, 14 ... DC power supply.

Claims (1)

(57) [Claims] 1. Steps connected endlessly and traveling between two entrances and exits, balustrades erected on both sides of these steps, and a part of the balustrade is supported by the balustrades, and both entrances and exits are provided. In a passenger conveyor handrail inspection device including a handrail that travels at substantially the same speed as the step and a driving device that causes the step and the handrail to travel, when the handrail is inspected, A photoelectric sensor that is opposed to and installed at a predetermined distance, an optical fiber connected to the photoelectric sensor, emits light and detects reflected light from the back surface of the handrail, and detects the reflected light with respect to a preset value. A passenger conveyor, comprising: an amplifier for generating an output signal according to the magnitude of light; and a display device for displaying the presence or absence of the output signal of the amplifier. Of the hand rail inspection system.