JPS62282214A - Contact inspection apparatus of moving body - Google Patents

Abstract

PURPOSE:To attempt contact inspection without liquid contacting medium, elimination of contamination of a specimen and miniaturization of an apparatus, by allowing a detecting unit to shift for deviation in the conveying direction of a moving body and holding tightly a stylus on a surface of the moving body. CONSTITUTION:When a detecting unit 20 approaches a cylinder 10, a friction plate 24 of a synchronizer 22 is brought to contact with the cylinder, a body subject to flaw detection, and next, a spring 25 is compressed and a stylus 21 is brought to tight contact with cylinder 10 through a rubber contact medium 23. Here, the synchronizer 22 is brought to contact with a surface of the cylinder 10 by the increase of compressing force and starts to move in the peripheral direction in synchronization with this. Next, upon further advance of a slider 42, a spring 27 is deformed to absorb this movement. Next, when a crank mechanism rotates further by a half revolution, the slider 42 begins retreat to firstly separate the stylus 21 and then, the entire detecting unit 20 is separated from the cylinder 10 to end a cycle. And, a measuring operation by the stylus 21 is conducted with the timing with which the stylus 21 is brought to contact with the cylinder 10 and is moving.

Description

[Detailed description of the invention] 3. Detailed description of the invention [Purpose of the invention] (Industrial application field) The present invention relates to a contact inspection device for a moving object.

(Prior art) For example, surface dose rate and surface contamination of cylinders such as drums! In addition to the above inspection items, ultrasonic inspection equipment is also effective for inspecting and measuring the distribution of internal fillings, density distribution, etc. It is.

By the way, in such an ultrasonic inspection device, it is known that if there are air bubbles or bubbles between the object to be inspected and the probe, the ultrasonic conduction efficiency decreases and the constant sensitivity decreases. ing.

In addition, in order to increase the constant accuracy, it is necessary to measure at multiple points while rotating the cylinder, but it is difficult to directly contact the measuring head with the rotating cylinder to avoid an air layer. Due to friction! This causes problems such as wear of the I constant. Therefore, in the past, water, ura, grease, rubber-like elastic bodies, etc. came into contact between the cylinder and the IUL+constant! A method was adopted to eliminate gaps by intervening quality.

7 to 9 show a conventional ultrasonic inspection apparatus.

That is, FIG. 7(a) is an explanatory side end view of the first conventional example of an ultrasonic inspection apparatus, FIG. 7(b) is a plan view of FIG. A side cross-sectional explanatory diagram showing a conventional example,
FIG. 9 is a side sectional explanatory view showing a third conventional example.

The first conventional example shown in FIG. 7 is an embodiment in which the gap is cleared by directly interposing couplant material 3 such as grease or rubber elastic material between the gate of cylinder 1 and probe 2, which are the objects to be inspected. It is.

In the second conventional example shown in FIG. 8, in order to inspect the entire circumference of the cylinder 1, the cylinder 1 is placed on a rotary table 4 and rotated, and there is no water, oil, etc. between the cylinder 1 and the probe 2. This is an embodiment in which ultrasonic waves are irradiated while the couplant 3 is flowing. In this second conventional example, the couplant 3 in J3 is injected into the chamber 5,
It is designed to be discharged from the lower tray 6.

In the third conventional example shown in FIG. 9, a cylinder 1 is immersed in an inspection tank 8 filled with a couplant 3 such as water, and a measuring tip 2 is rotated in the test tank 8 while facing the cylinder 1. This is an embodiment in which the entire circumference of the cylinder 1 is covered by ultrasonic measurement while being rotated by the table 4.

(Problems to be Solved by the Invention) However, in the above-mentioned first conventional example (Y, cylinder 1
If you want to perform an inspection over the entire circumference of the cylinder, rotating the cylinder 1 with the probe 2 in contact with the cylinder 1 will cause the grease as the couplant 3 to scatter and the rubber to wear out. Once the measuring head 2 is moved backward, the cylinder 1 is
Rotate the probe 1 pitch, and then move the probe 2 to find the object 1.
It is necessary to repeat the step of taking ultrasonic measurements in close contact with the patient.

Therefore, when inspecting a large cylinder such as a drum, the conventional procedure is complicated and inefficient, and complete automation cannot be achieved.

On the other hand, the above-mentioned second and third conventional examples attempt to automatically perform flaw detection over the entire circumference of the cylinder 1 while continuously rotating it. The couplant 3 that flows into the couplant 5 is likely to cause bubbles to be trapped, which not only makes the inspection less reliable, but also makes the couplant 3
The disadvantage is that the equipment for recovery and recirculation is large-scale.

Furthermore, as a problem common to the above-mentioned second and third conventional examples, when using a wooden climbing material as the couplant 3, the test object tends to be contaminated, and when oil such as grease is used, the test object The surface of the product may become contaminated.

Furthermore, the above-mentioned problems are common not only to the measurement of the rotating body i'lG, but also to measurement methods in which the object to be inspected moves continuously and measurement must be carried out in a contact manner.

The present invention solves the above-mentioned problems of the prior art, and includes: carrying out measurement on the body side while keeping a measuring element in close contact with the moving body without stopping the movement of the moving body including a rotating body such as the cylinder; Another object of the present invention is to eliminate the need for liquid couplants such as water and grease, eliminate contamination caused by these substances, and downsize the device.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention includes a detecting section provided with a probe that contacts the surface of a moving body, and a detecting section that is provided with a probe that contacts the surface of a moving body, and a detecting unit that detects in synchronization with the moving speed of the moving body. a reciprocating drive mechanism that moves the section back and forth toward the moving body, and a reciprocating drive mechanism that is interposed between the detecting section and the ffi return mechanism, and that moves the detecting section while the measuring element is in contact with the surface of the moving body. It is characterized by having a link mechanism that moves the probe in the transport direction of the moving body and holds the probe in close contact with the surface of the moving body.

(Function) The probe moves with the moving body according to the 'fAQ fixed timing and comes into close contact with the moving body, and then the dissolved amount η is measured.

(Example) Hereinafter, a case in which the present invention is applied to a rotary ultrasonic measurement device will be described in detail using the drawings.

Fig. 1 is a strategic plan explanatory diagram showing the first embodiment of the ultrasonic inspection device of the present invention, Fig. 2 is a cutaway to the main part of Fig. 1, and Fig. 3 shows the movement of the link mechanism and the detection section. An explanatory diagram, FIG. 4 is an explanatory diagram showing the relationship between the movement of the slider and the synchronous movement of the detection unit,
FIG. 5 is an explanatory diagram of the measurement pitch.

In FIG. 1, the ultrasonic probe (oral inspection device) of the present invention has a cylinder 10 rotating in the direction of the arrow as a fixed object, and a detection unit 20 disposed opposite to the outer periphery of the cylinder 10.
It is generally composed of a link mechanism 30 that always directs the sensor 0 toward the center of the cylinder 10, and a reciprocating mechanism 40 that moves the detection section 20 and the link mechanism 30 forward and backward toward the outer circumference of the cylinder 10.

Next, the detailed structure of the main parts of the first embodiment will be explained with reference to FIG.

First, the detecting section 20 includes an ultrasonic Jl constantor 21 that also serves as an ultrasonic oscillation J3 and a receiving section, a couplant material 23 made of rubber elastic material attached to this probe 21, the probe 21 attached to the tip, and a spring 27. The holder 26 is engaged with the detection unit mounting plate 28 of the link mechanism 30 via the holder 26.
It consists of a contact element or synchronizer 22 engaged through a spring 25, and a rubber friction plate 24 attached to the tip of the synchronizer 22 to increase the frictional force with the cylinder 10.

The synchronizer 22 faces the outer periphery of the cylinder 10, and when it is pressed against the cylinder 10, the synchronizer 22 sinks into the holder 26 against the biasing pressure of the spring 25, and the probe 21 relatively protrudes, causing the cylinder to close. Contact 10.

Next, the link mechanism 30 connects the holder 26 of the detection section 20
A substantially trapezoidal parallel link portion consisting of a detection unit mounting plate 28, an equal length link 3L 32, and a fixed link 33 engaged via a spring 27, and the equal length link 32 and fixed link 33 are provided between It is composed of a return spring 34 and a stopper 35.

For the equal length links 31 and 32, the hinge interval on the plate 28 is set smaller than the hinge interval on the fixed link 33, so that even if the link mechanism 30 is deformed, the detection unit It is designed to always face the center of the flaw detection object 10.

The return spring 34 biases the parallel link portion in a direction opposite to the direction of rotation of the cylinder 10 shown by the arrow. When the detection unit 20 comes into contact with the cylinder 10 in this state, the /
! The 3iII force resists the spring pressure and deforms the parallel link portion along the direction of rotation. Next, when the detection part 20 is separated from the cylinder 10, the parallel link part returns to its initial shape. This initial shape is set by the stopper 35.

The reciprocating drive mechanism 40 includes a motor 41 that rotates in synchronization with the rotation of the cylinder 10, a drive shaft 45, a crank mechanism 44, a slider 42 coupled to the fixed link 33, and a guide 43 that guides the slider 42. has been done.

Here, the crank mechanism 44 directly converts the rotation of the motor 4 into a reciprocating motion and transmits it to the slider 42, and the slider 42 connects the detection unit 20 to the detection unit 20 via the link mechanism 30.
is moved forward and backward toward circle fFi10.

Next, the function of the water bag ■ will be explained. When the crank mechanism 44 of the drive ai m 40 rotates once while the cylinder 10 is placed on a drive device (not shown) and rotates in the direction of the arrow,
The slider 42 reciprocates once, and the detection unit 20 detects the link mechanism 3.
0 through the cylinder 101. On the other hand, when the detection unit 20 approaches the cylinder 10 without performing the cycle of approach, close contact, separation, and retreat, the friction plate 24 of the synchronizer 22 comes into contact with the flaw detection object 10, and then the spring 25 is compressed. Measuring head 2
1 is tightly attached to the cylinder 10 via the couplant 23.

Synchronize here! , I'-22 is accompanied by some slip at the beginning of contact with the cylinder 10, but due to an increase in pushing force, it comes into close contact with the surface of the cylinder 10, and in synchronization with this, starts to move in the circumferential direction.

As the slider 42 moves further forward, the spring 27 deflects and absorbs this slack.

Next, when the crank mechanism 44 makes another half turn, the slider 42 begins to retreat, retracing the process described above, first the probe 21 touches the ground, and then the entire detection part 20 moves to the cylinder 1.
It departs from 0 and one cycle ends. The measurement operation by the measuring element 21 is performed at a timing when the M stator 21 is in close contact with the cylinder 10 and is moving.

During this measurement period, the link mechanism 30 operates so that the detection section 20 always faces the center of the cylinder 10. This link mechanism 3
0 and the movement of the detection unit 10 will be explained with reference to FIG.

In FIG. 3, (a) shows the beginning of Is that opposes the cylinder 1o of the detection unit 20 at the initial position, (b) shows the intermediate position, and (c)
shows a state where the detection unit 20 is about to separate from the flaw detection object 10 at the terminal position d.

During the periods (a) to (c), the detection unit 20 moves in synchronization with the rotation of the cylinder 10, and the probe 21 always faces the center O of the cylinder.

The above-mentioned movement is achieved by configuring the hinge spacing of the equal links 31 and 32 of the link mechanism 30 on the detection unit mounting plate 28 to be smaller than the hinge spacing on the fixed link 33, as described above. be done.

Note that the return operation after completing one cycle from the second layer (a) to (c) is performed by the return spring 34 provided in the link lR30 as described above, and the initial rise (2) is performed by the stopper 3.
5 is maintained.

The relationship between the movement of the slider of the drive section and the synchronous movement of the detection section is as shown in FIG. 4, and when the crank mechanism rotates at a constant speed, the movement of the slider forms a sine wave.

FIG. 5 is an explanatory diagram of the measurement pitch in the case of the above-mentioned IRJ sonic sound depth inspection.

As shown in FIG. 5, when measuring the circumference of the cylinder 10 by n minutes PI, it is sufficient to rotate the crank mechanism n times while the cylinder 10 rotates once, and the measurement pitch in that case is O is 360'/n. Therefore, by changing the opening rotation speed of the crank mechanism in accordance with 1 degree of 100 revolutions of the cylinder, the measurement pitch can be arbitrarily set.

Next, a second embodiment of the present invention will be described with reference to FIG.

In the second embodiment shown in FIG.
and a receiver 21B, and these are divided into a cylindrical probe 1 and a receiver 21B.
Itoyo JF facing both sides of 0! This embodiment differs from the first embodiment described above in that it uses an i-device.

Therefore, in the second embodiment, the detection unit 2OA, the link mechanism 30A, and the driving mechanism 40A are provided on the oscillator 21A side.
In addition, a detection unit 20B and a link 1 structure 3 are installed on the receiver 21B side.
0B and a drive mechanism 40B are provided, but their structures and operations are completely the same as in the first embodiment described above.

In each of the embodiments, the present invention is applied to the measurement of a rotating cylinder, but the present invention can be applied to general measurement methods for moving bodies in linear motion or ponds.

In addition, as a measuring medium used as a measuring element, not only an ultrasonic optical pendulum, a receiver, or a dual-purpose one as in the embodiment, but also an X
The present invention can be generally applied to methods that require contact measurement of an object to be inspected using a measurement medium such as a wire or a wire.

Effects of the Invention 1 As described above, the present invention has the following effects.

(1) W11 determination can be performed while avoiding continuous movement of the moving object, and automation is possible.

(2) Since water and oil are not used as couplants, there is no rust or contamination of the test object or equipment, and the equipment itself is smaller.
There is no need to worry about pre-processing or post-processing.

[Brief explanation of drawings]

1 to 5 show a first embodiment of the ultrasonic inspection apparatus of the present invention, in which FIG. 1 is a schematic plan view, FIG. 2 is an explanatory view of the main parts of FIG. 1, and FIG. ) (b) (C) (d) are explanatory diagrams showing the movement of the link mechanism and the detection unit, respectively. Fig. 4 is an explanatory diagram showing the movement of the slider and the movement of the detection unit. Fig. 5 is an explanatory diagram of the measurement pitch. FIG. 6 is a schematic plan view showing the second embodiment of the ultrasonic inspection apparatus of the present invention, and FIG.
FIG. 9 shows a conventional ultrasonic inspection apparatus, FIG. 7(a) is a side cross-sectional explanatory view of the first conventional example, and FIG.
), FIG. 8 is a side sectional view of the second conventional example,
FIG. 9 is a side cross-sectional explanatory view of the third conventional example. 10... Cylinder (moving body) 2o... Detection unit 21... Measuring element 22... Synchronizer (contact element) 23... Couple material 24... IIJ drifting plate 25... Spring 2G ...Holder 27...-Spring 28...Detection unit mounting plate 30...Link 37...Equal length link 32...Equal length link 33...Fixed link 34...Return spring 35 ... Stopper 40 ... -1T redrive @ PM structure 41 ... Motor 42 ... Slider 43 ... Guide 44 ... Crank mechanism 45 ... Drive shaft

Claims (2)

[Claims] (1) A detection unit equipped with a probe that contacts the surface of the moving body;
A reciprocating drive mechanism that moves a detection unit back and forth toward the movable body in synchronization with the moving speed of the movable body, and a reciprocating drive mechanism that is interposed between the detection unit and the reciprocating drive mechanism, and in which the measuring tip contacts the surface of the movable body. 1. A contact inspection device for a movable body, comprising a link mechanism that moves and deviates the detection unit in the moving direction of the movable body to hold the probe in close contact with the surface of the movable body. (2) The detection unit includes a holder and a contact that is disposed so as to be retractable in the holder and is always held in a protruding state by a spring, and the measuring probe is fixed to the deep inside of the contact. The contact of the movable body according to claim 1, wherein the measuring probe moves relatively forward and comes into contact with the surface of the movable body by retreating due to the contact pressure of the contact against the movable body. Inspection equipment.