JP2007178197A - Tool for probe of ultrasonic flaw detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool for a probe having the function of acquiring specific positional information on where the probe is in its relation with a body under inspection, and simply and accurately measuring positions, etc. of a weld part going to be inspected and even of the probe. <P>SOLUTION: This tool 1 basically comprises a body 2 and a guide member 3. The guide member 3 is mounted on the body 2 so that it can freely make turning motion centering on a fictive intersecting line of an outside surface of a guide plate 3b constituting part of the guide member 3 and an outside surface of a base plate 2b constituting part of the body 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a probe jig for an ultrasonic flaw detector, and in particular, a probe for a probe having a function of grasping position information indicating where the probe is in relation to an object to be inspected. Concerning ingredients.

  2. Description of the Related Art Conventionally, an ultrasonic flaw detection method is known as a method for detecting a defect or the like of a welded part without destroying an inspection object. The ultrasonic flaw detection method is a method of inspecting the inside of an inspection object by checking a reflected wave on a monitor while closely moving a probe that transmits and receives an ultrasonic pulse to the surface of the inspection object. It is.

  By the way, in this ultrasonic flaw detection method, when the probe is brought into close contact, it is necessary to press the probe against the object to be inspected with a certain strength. This is because if the strength for pressing the probe is not constant, the ultrasonic pulse cannot be read under the same conditions, so that there is a problem that an accurate inspection inside the object cannot be performed.

Therefore, in order to make it possible to press the probe against the object to be inspected with a certain strength, conventionally, a jig for holding and fixing the probe has been developed. For example, Japanese Utility Model Laid-Open No. 61-155762 (Patent Document 1) and Japanese Patent Application Laid-Open No. 11-142379 (Patent Document 2) disclose techniques relating to such a jig.
Japanese Utility Model Publication No. 61-155762 Japanese Patent Laid-Open No. 11-142379

  However, the probe jigs disclosed in these patent documents are mainly developed for the purpose of bringing the probe into close contact with the object to be inspected. In this relation, it does not have a function of grasping position information about where it is specifically located. Therefore, with these conventional jigs alone, for example, in the case of a welding defect, there is a problem that the position from the welded portion to be inspected to the flaw detector cannot be measured accurately and simply.

  The present invention has been made to solve such a problem, and has a function of grasping positional information of where the probe is specifically in relation to the object to be inspected. An object of the present invention is to provide a jig for a flaw detector capable of accurately and simply measuring the position and the like from a welded portion to be flawed.

  As a means for this, a jig for a flaw detector of an ultrasonic flaw detector according to the present invention includes a main body, a guide member, and a probe holding mechanism, and the guide member is one of the guide members. The probe holder is attached to the main body so as to be freely rotatable about a virtual intersection line between the outer surface of the guide plate constituting the portion and the outer surface of the base plate constituting a part of the main body. The mechanism is configured to hold a probe for an ultrasonic flaw detector and is attached to a part of the main body, and a magnet is disposed on the outer surface of the base plate and the outer surface of the guide plate. Is the main feature.

  The jig for a flaw detector according to the present invention has a function of grasping positional information as to where the probe is specifically located in relation to the object to be inspected. According to the child jig, the position and the like from the welded portion to be inspected to the flaw detector can be measured accurately and simply.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 shows a flaw detector 1 according to this embodiment. As illustrated, the jig 1 includes a main body 2, a guide member 3, and a probe holding mechanism 4.

  FIG. 2 shows a state in which the jig 1 is used in a steel deck 21 of an existing bridge. In FIG. 2, 22 is a deck plate, 23 is a truffle, 24 is paved, 25 is a welded portion between the deck plate 22 and the truffle 23, and 26 is a welding reference position (on the welded side of the deck plate 22 and the truffle 23). The position where the surfaces meet). In FIG. 2, the probe holding mechanism 4 is not shown for easy understanding of the structures of the main body 2 and the guide member 3 constituting the jig 1.

  As shown in these drawings, the main body 2 of the jig 1 is a base plate 2b made of a rectangular flat plate, and a flat plate extending perpendicularly to the base plate 2b and lacking a central portion. It consists of two side walls 2s, 2s that are made.

  The guide member 3 of the jig 1 is a guide plate 3b made of a rectangular flat plate, and a flat plate extending perpendicularly to the guide plate 3b, and has two fan-shaped side walls 3s lacking a central portion. , 3s. And the guide member 3 is attached to the inner side of the main body 2 so that it can freely rotate around the virtual intersection line of the outer surface of the guide plate 3b and the outer surface of the base plate 2b.

  In order to enable such movement of the guide member 3, as shown in the figure, guides formed on the side walls 3s, 3s of the guide member 3 along an arc centered on the virtual intersection line. The groove 5 is provided on the side walls 2s and 2s of the main body 2 with a convex portion 6 configured to move in the guide groove 5 respectively.

  Magnets 7 are disposed on the outer surface of the base plate 2b and the outer surface of the guide plate 3b so as to form a part of the outer surfaces.

  As shown in FIG. 1, the probe holding mechanism 4 includes a frame 8, two guide rails 9, 9, a feed screw 10, and a probe fixing base 11. It is attached to the outside of one side wall 2s. The probe holding mechanism 4 rotates the knob 12 attached to one end of the feed screw 10 so that the base 11 reciprocates along the guide rails 9 and 9 attached to the inside of the frame 8. Is configured to move. In FIG. 1, reference numeral 13 denotes a probe fixed to the base 11.

  As shown in FIG. 2, the jig 1 according to this embodiment has a magnetic force of the magnet 7 on the deck plate 22 on the outer surface of the base plate 2b and on the truffle 23 on the outer surface of the guide plate 3b. And is used as a jig in this state. At this time, since the side walls 2 s, 2 s of the main body 2 and the side walls 3 s, 3 s of the guide member 3 have a sector shape lacking the center portion, the jig 1 does not hit the welded portion 25, and the deck plate 22 and The trough rib 23 can be in close contact.

  Since the jig 1 according to the present embodiment is in close contact with the steel floor slab 21 in this way, when the jig 1 is in close contact with the steel floor slab 21, the virtual intersection line in the jig 1 and The welding reference line 26 always matches. Therefore, according to the jig 1, the probe can be moved from the welding reference position to the probe only by measuring the distance from the virtual intersection of the jig 1 to the probe 13 while being in close contact with the deck plate 22 and the trough 23. Positions up to 13 can be determined accurately.

  As described above, the jig 1 according to this embodiment has a function of grasping position information indicating where the probe is specifically located in relation to the object to be inspected. Therefore, according to the jig 1 according to the present embodiment, the position and the like from the welded portion to be inspected to the flaw detector can be measured accurately and simply.

  Further, as described above, the guide member 3 of the jig 1 according to the present embodiment can freely rotate around the virtual intersection line between the outer surface of the guide plate 3b and the outer surface of the base plate 2b. Since it is attached to the main body 2, the deck plate 22 and the truffle 23 can be surely adhered to each other regardless of the angle at which the deck plate 22 and the truffle 23 are joined. Therefore, the jig 1 according to the present embodiment can be used for any steel deck as long as it is a steel deck comprised of a deck plate and a truffle.

  Furthermore, since the jig 1 according to this embodiment can move the base 11 by rotating the knob 12, according to the jig 1, the main body 2 is magnetically fixed to the object to be inspected. The probe 12 can be moved as it is. Therefore, the peak position of the reflected wave can be confirmed easily and simply for the operator.

  In this case, although not shown here, a measuring means such as a scale in millimeters is provided on the frame 8 so that the moving amount of the base 11, that is, the moving amount of the probe 12 can be easily measured. It may be provided on the upper surface.

  Further, in order to prevent the magnets 7 arranged on the outer side surface of the base plate 2b and the outer side surface of the guide plate 3b from directly hitting the object to be inspected, the both outer side surfaces protrude slightly from the magnets 7. Legs may be provided. In this case, if the leg is replaced with a wheel or a roller, the jig 1 can be moved while being magnetically attached to the object to be inspected.

  In the above description, the jig 1 according to the present invention has been described for the flaw detection inspection of the welded portion between the deck plate and the trough rib in the existing bridge, but the flaw detector jig according to the present invention is not limited to this. It can also be used for flaw detection inspections such as the transverse rib welds of bridges. In addition, it is not limited to bridge welds, and should be used as a probe jig for flaw detection of welded parts of two members that are welded so as to have a predetermined angle, such as T-joints and joints. Can do.

The perspective view of the jig | tool 1 which concerns on this invention. The figure which showed a mode that the jig | tool 1 which concerns on this invention was used for the steel deck 21 of the existing bridge.

Explanation of symbols

1: Jig,
2: Body,
3: Guide member,
4: Probe holding mechanism,
5: Guide groove,
6: convex part,
7: Magnet,
8: Frame,
9: Guide rail,
10: Lead screw,
11: Base,
12: Knob,
13: Probe,
21: Steel floor slab,
22: Deck plate,
23: Traflib,
24: Pavement,
25: welded part,
26: Welding reference position

Claims (2)

A jig for a probe of an ultrasonic flaw detector,
Consists of a main body, a guide member, and a probe holding mechanism,
The guide member is attached to the main body so as to freely rotate about an imaginary line of intersection between an outer surface of a guide plate constituting a part of the guide member and an outer surface of a base plate constituting a part of the main body. Installed,
The probe holding mechanism is configured to hold a probe for an ultrasonic flaw detector, and is attached to a part of the main body,
A probe jig, wherein magnets are disposed on an outer surface of the base plate and an outer surface of the guide plate.   2. The probe jig according to claim 1, wherein the probe holding mechanism includes measurement means for measuring a distance from the virtual intersection line to the probe. 3.

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