JPH09110359A - Leakage sensitive x-ray radiographic flaw detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inform a situation of something wrong at a real time by installing a sensing means, sensing a leakage of X-rays, in an X-ray radiographic flaw detector. SOLUTION: A handrail 1 during man-conveyor driving is inserted into an X-ray radio-graphic flaw detector 9 provided with a leakage sensitive sensor 10, pushing a power switch 9D. Subsequently, an X-ray generating switch 9C is pushed, thereby generating X-rays from an X-ray generating part 9A. The presence of any damage to a reinforcing wire in an inner part of the handrail 1 is judged by a rupture pattern 1AX displayed on a display film of an X-ray display part 9B. At that time, in the case where something wrong such as leakage or the like has occurred in the X-ray radiographic flaw detector 9, it is sensed at once by the leakage sensitive sensor 10, and if it exceeds the safety setting value, this abnormal state is informed to an operator by a buzzer 9E or a warning lamp 9G. In addition, even in the case where the operator becomes unaware of information on the trouble happening as well as if it has exceeded the setting value of X-rays the X-ray generating switch 9C is automatically interrupted. Therefore, any possible exposure and leakage accidents against the operator are thus prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flaw detector using X-rays, which requires immediate judgment (judgment) of the life or the remaining life of a reinforcing member such as a metal inside a handrail of a passenger conveyor or the like. The present invention relates to a leak-sensing X-ray flaw detector for detecting X-ray leakage in an apparatus.

[0002]

2. Description of the Related Art Conventionally, the inspection and judgment of damage of a man conveyor has been made based on the experience and intuition of a maintenance engineer. However, there are some that carry out internal flaw detection with an X-ray device or the like. It was

In the conventional X-ray flaw detector, as shown in FIG. 3, X-rays are generated toward the handrail 1 of the subject, and a voltage controlled by the X-ray controller 7 is generated by the X-ray generator 6 to generate the X-rays. The X-ray photosensitive film 8 was exposed to the reinforcing wire 1A inside the handrail through the handrail 1 of the sample, and the film batch 1 was regularly used to prevent the worker from being exposed to radiation.
The safety of workers was ensured by measuring with 2 etc.

There has been a problem that it is not possible to make a judgment when it is necessary to immediately judge whether or not the safe threshold value has been exceeded, and it is not possible to prevent exposure to the radiation.

[0005]

In the above prior art, the amount of exposure of the subject 11 (worker) to X-rays is judged with a delay of several days or hours after the film batch 12 was once developed. However, there was a problem in that it was necessary to immediately judge whether or not the safe threshold was exceeded, and it was not possible to prevent the exposure.

It is an object of the present invention to provide a leak sensing X-ray flaw detector which can notify an abnormal situation in real time.

[0007]

SUMMARY OF THE INVENTION The above-mentioned object is to realize a leak sensing X which is integrated with an X-ray generator and means for directly seeing a flaw detection condition by transmitting X-rays generated by the X-ray generator through a subject.
This can be achieved by providing the line flaw detector with a sensing means for sensing the leakage of the X-ray.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing a drive system of a handrail of a passenger conveyor.

The handrail 1 of the passenger conveyor is driven by a drive pulley 5 and circulates along a guide roller 4, upper and lower gate rollers 3 and a guide rail 2.

However, since the handrail used for department stores and city traffic is continuously used for a long time, the internal wire 1A which reinforces the handrail is bent to cause damage such as disconnection.

According to the present embodiment, as shown in FIG. 2, the handrail 1 being driven by the man conveyer is inserted into the X-ray flaw detector 9 having the leak detection sensor 10 and the power switch 9D is pushed. After that, the switch of the X-ray generation switch 9C is pressed to generate X-rays from the X-ray generation unit 9A, and the state where the X-ray generation unit 9A has transmitted through the subject handrail 1 is displayed on the display film (viewer) of the X-ray display unit 9B. It is possible to determine whether the reinforcing wire 1A inside the handrail 1 of the handrail 1 is damaged by the pattern 1AX, but if an abnormality such as a leak occurs in the X-ray device at that time, the X-ray detection sensor is immediately detected. If it is detected by 10 and exceeds a safe set value, the buzzer 9E or the warning light 9G can notify the worker 11 of an abnormal situation.

Even if the user does not notice the notification of the occurrence of an abnormality, the X-ray generation switch 9C is automatically shut off when the set value of the X-ray is exceeded.
It is double secured.

[0014]

According to the present invention, when the X-ray of the X-ray device leaks, the abnormality can be immediately notified, and the power can be automatically cut off even when the hearing-impaired person does not notice the notification.

[Brief description of the drawings]

FIG. 1 is a side view showing a handrail drive system of a passenger conveyor.

FIG. 2 is a perspective view showing an embodiment of the present invention.

FIG. 3 is a perspective view using a commonly used industrial X-ray.

[Explanation of symbols]

 1 Handrail 1A Reinforcing wire inside the handrail 1AX X-ray flaw detection pattern of reinforcing wire 2 Guide rail 3 Gate roller 4 Guide roller 5 Drive pulley 6 X-ray generator 6AX X-ray 7 X-ray controller 8 X-ray photosensitive film 9 Direct view X-ray flaw detector 9A X-ray generator 9AB High-voltage generator 9AX X-ray 9B X-ray display 9C X-ray generator switch 9D Power switch 9E X-ray leakage caution buzzer 9F X-ray intensity adjustment dial 9FA X-ray controller 9G Caution light 10 Leakage sensor 11 Worker 12 Film badge

Claims (3)

[Claims] 1. A leak-sensing X-ray flaw detector, comprising: an X-ray generator; and means for directly seeing a flaw detection situation by transmitting X-rays generated from the X-ray generator through a subject.
A leak-sensing X-ray flaw detector, comprising a sensing means for sensing a leak of a ray. 2. The leak-sensing X-ray flaw detector according to claim 1, further comprising a notifying unit for notifying the fact that an X-ray leaking from the X-ray generator is detected. 3. The leak detection X-ray flaw detector according to claim 1, further comprising a power shutoff means for automatically shutting off power when an X-ray leaking from the X-ray generator is sensed.