JPH10111227A - Elongation measuring reticule mark having fixing jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the inspection accuracy of an optical extensometer such as a laser, and to remove the necessity of reinspection and to shorten an inspection process. SOLUTION: An arrow 4 and a guide board 6 are moved in the direction A, and gaps are formed between the arrow 4 and the guide board 6 and a test piece touching element 3B. A test piece 1 is inserted into the gaps and is brought into contact with the test piece touching element 3B, and both side surfaces of the test piece 1 is brought into contact with the connecting element 3C and the guide board 6, and the arrow 4 is moved to the side of the test piece touching element 3B. By its tip, the surface of the test piece 1 is pressed toward the test piece touching element 3B in a direction of meeting at right angles with the test piece 1 (in the direction of thickness of the test piece), and the reticule mark 2 is fitted to the test piece 1. By pressing both side surfaces of the test piece 1 with the connecting element 3C and the guide board 6, the reticule mark 2 is prevented from swaying left and right.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mark for an optical non-contact type extensometer such as a laser having a fixing jig.

[0002]

2. Description of the Related Art The "fixing jig for marking marks for elongation measurement" proposed in Japanese Utility Model Laid-Open Publication No. Hei 6-2202 is provided with a mechanism for pressing a test piece in a direction perpendicular to the mark. A mark mark having a fixed jig is disclosed (hereinafter, referred to as “prior art”).

FIGS. 5 to 8 are views showing examples of mark marks for elongation measurement having a fixing jig according to the prior art. FIG.
Is a front view. FIG. 6 is a view taken in the direction of the arrow b in FIG.
5 is a side view as viewed from the side b. FIG. 7 is a bottom view of FIG. 5 viewed from the direction of arrow c, that is, FIG. FIG.
FIG. 7 is a side view in the same direction as FIG. 6 showing a state in which a mark is attached to a test piece.

In FIGS. 5 to 8, reference numeral 2 denotes a marking line mark formed of a strip-shaped plate having a marking line of one character on one surface. A fixing jig Y is provided on the other surface of the marked line mark 2. The fixing jig Y includes a fixing jig body 3 provided integrally with the marking line mark 2 and a holding mechanism. The fixing jig main body 3 includes a test piece abutting portion 3B abutting and fixed to the other surface of the marking line mark 2, an opposing portion 3A,
It has a U-shaped (see FIG. 7) box having an open portion, which is formed between a test piece contact portion 3B and a facing portion 3A and a connecting portion 3C provided orthogonally thereto.

[0005] An arrow 4 penetrating at right angles to the facing portion 3A is inserted into the facing portion 3A of the fixing jig body 3. A spring 5 is disposed around the arrow 4 between the test piece contact portion 3B and the facing portion 3A. The arrow 4 is provided with a force to move toward the test piece contact portion 3B by the action of the spring 5, and constitutes a holding mechanism for pressing the test piece 1 toward the test piece contact portion 3B.

The arrow 4 is indicated by A in FIG. 6 and FIG.
When the test piece 1 is moved in the direction of the arrow, a gap is formed between the test piece abutting portion 3B and the arrow 4, and the test piece 1 is inserted into the gap. As a result, the arrow 4 moves in the B direction shown by the arrows in FIGS.
Is pressed by the arrow 4 in the direction perpendicular to the test piece 1 (the thickness direction of the test piece 1),
Is attached to the test piece 1.

[0007]

FIG. 9 and FIG. 10 are views for explaining the positions of elongation measurement depending on how the marking marks are attached. The state shown in FIG. 9 is a normal state in which the mark is not deviated left and right, and the state shown in FIG. 10 is an abnormal state in which the mark is not suitable for measurement in which the mark is inclined left and right. In the fixing jig Y proposed in the prior art, since the test piece 1 is only pressed in a direction perpendicular to the test piece 1 (the thickness direction of the test piece), as shown in FIG. In addition, the fixing jig body 3 swings right and left with respect to the test piece 1 and accordingly, the mark mark 2 also swings right and left and tilts. Therefore, in the case of B shown in FIG. 10, the elongation is measured to be shorter than the actual elongation, or in the case of C, the elongation is measured to be longer than the actual elongation. There is a problem that a retest must be performed. Such a situation occurs occasionally in the prior art. Here, the elongation is correctly measured only in the case of A.

[0008] In the prior art, the above-mentioned state occurs because the fixing jig only functions to press the test piece in a direction perpendicular to the test piece. Because there is no. As described above, in the prior art, it is an issue to eliminate a retest that occurs when the mark mark swings right and left, but a means for solving the problem has not yet been developed.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a mark for elongation measurement having a fixing jig which can always perform correct measurement without performing a retest.

[0010]

According to the first aspect of the present invention,
A strip mark mark provided with a one-character mark line on one surface, and a fixing jig provided on the other surface of the mark mark, for elongation measurement having a fixing jig A marking mark, wherein the fixing jig is integrally attached to the marking mark, and the fixing jig body is formed by pressing a test piece in a direction orthogonal to the test piece. And a guide mechanism, which is provided so as to be able to contact both sides of the test piece and is in contact with both sides of the test piece to prevent the deflection thereof. It has.

[0011]

Next, the present invention will be described with reference to the drawings. FIGS. 1 to 4 are views showing an embodiment of a mark for elongation measurement having a fixing jig according to the present invention. FIG. 1 is a front view. FIG. 2 is a view taken in the direction of arrow b in FIG.
That is, FIG. 1 is a side view as viewed from the side b. FIG. 3 is FIG.
2 is a bottom view of FIG. 1 as viewed from the direction of arrow c. FIG. 4 is a side view in the same direction as FIG. 2 showing a state in which a mark is attached to a test piece.

As shown in FIGS. 1 to 4, the present invention comprises a mark 2 and a fixing jig X. Mark 2
Is composed of a strip-shaped plate body having a one-character marking line on one surface. The fixing jig X is provided on the other surface of the marking line mark 2. The fixing jig X includes a fixing jig main body 3 provided integrally with the marking line mark 2, a clamping mechanism,
It consists of a guide mechanism. The fixing jig main body 3 includes a test piece abutting portion 3B abutting and fixed to the other surface of the marking line mark 2, an opposing portion 3A, a test piece abutting portion 3B and an opposing portion 3B.
A is formed of a U-shaped (see FIG. 3) box having an open portion, comprising a connecting portion 3C provided orthogonally to these portions.

A guide plate 6 penetrated at right angles to the facing portion 3A is inserted into the facing portion 3A of the fixing jig body 3. A spring 7 is disposed around the guide plate 6 between the test piece contact portion 3B and the facing portion 3A.
The guide plate 6 is given a force to move toward the test piece contact portion 3B by the action of the spring 7.

Further, an arrow 4 is inserted inside the guide plate 6 so as to penetrate at right angles to the facing portion 3A. Arrow 4
, A spring 5 is interposed between the test piece contact portion 3B and the facing portion 3A. The arrow 4 is provided with a force to move toward the test piece contact portion 3B by the action of the spring 5, and constitutes a holding mechanism for pressing the test piece 1 toward the test piece contact portion 3B.

The guide plate 6 is provided at a position where it can freely contact one side of the side surface of the test piece 1 pressed by the arrow 4. On the other hand, the other side surface of the test piece 1 is in contact with the connecting portion 3C. The guide plate 6 and the connecting portion 3C are in contact with both side surfaces of the test piece 1 arranged on the test piece contacting portion 3B side by portions indicated by oblique lines (see FIGS. 2 and 3) and hold down the test piece 1. This constitutes a guide mechanism for preventing the mark mark 2 and the fixing jig X from swaying left and right during the test.

In arranging the test piece 1, the arrow 4 and the guide plate 6 are moved in the direction A shown by the arrow in FIGS. 2 and 3, and a gap is provided between the arrow 4 and the guide plate 6 and the test piece contact portion 3B. The test piece 1 is inserted into the gap, and the test piece contact portion 3
B and the test piece 1 on the connecting portion 3C and the guide plate 6.
Contact both sides of the test piece, and release the arrow 4 to make the test piece contact portion 3B
The test piece 1 is moved toward the test piece 1 and pressed against the test piece 1 in the direction perpendicular to the test piece 1 (thickness direction of the test piece) by the tip thereof toward the test piece contact portion 3B. As a result, the mark 2 is attached to the test piece 1. Thus, the test piece 1
By using a fixing jig X having a mechanism for guiding the mark and a holding mechanism for pressing and holding, the mark mark 2 does not swing left and right, and correct measurement can be always performed.

[0017]

As described above, the use of the marking line for elongation measurement having the fixing jig of the present invention allows the left and right of the marking line mark generated when using the prior art to be used. Run-out is eliminated, and due to this run-out, there is no re-test that occurred in about 3% in the prior art.
It is always possible to make correct measurements, thus providing an industrially useful effect.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a view on arrow b of FIG. 1 showing one embodiment of the present invention.

FIG. 3 is a view taken in the direction of an arrow c in FIG. 1 showing one embodiment of the present invention;

FIG. 4 is a side view in the same direction as FIG. 2 showing one embodiment of the present invention in a state where a mark is attached to a test piece.

FIG. 5 is a front view showing an example of a marked line mark for elongation measurement having a fixing jig according to the prior art.

FIG. 6 is a view taken along arrow b in FIG. 5 showing an example of a marked line mark for elongation measurement having a fixing jig according to the prior art.

FIG. 7 is a view taken along the arrow c in FIG. 5 showing an example of a marked line mark for elongation measurement having a fixing jig according to the prior art.

FIG. 8 is a side view in the same direction as FIG. 6, showing an example of a marked line mark for elongation measurement having a fixing jig according to the prior art, with the marked line mark attached to a test piece.

FIG. 9 is a front view for explaining the position of elongation measurement depending on how the marking marks are attached.

FIG. 10 is a front view for explaining a position of elongation measurement depending on how a marked line mark is attached.

[Explanation of symbols]

 XY Fixing jig 1 Test piece 2 Marking mark 3 Fixing jig main body 3A Opposite part 3B Test piece contact part 3C Connecting part 4 Arrow 5 Spring 6 Guide plate 7 Spring

Claims (1)

[Claims] 1. A fixing jig comprising: a strip-shaped marking mark provided with a one-character marking line on one surface; and a fixing jig provided on the other surface of the marking mark. Marking marks for elongation measurement, wherein the fixing jig is a fixing jig body attached integrally with the marking marks, and a test piece is pressed in a direction perpendicular to the test piece. A holding mechanism for sandwiching between the fixing jig main body, and a guide mechanism provided so as to be capable of contacting with both side surfaces of the test piece, for contacting with both side surfaces of the test piece and preventing the shake thereof. A mark for elongation measurement having a fixing jig characterized by comprising: