JP2002122532A - Jig for cross cutting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig for cross cutting which enables forming of a cut simply and accurately on a test piece for the testing of a paint. SOLUTION: This jig is provided with a base member 2 set on a test piece T and a guide member 3 for guiding in the formation of cuts Ca and Cb. The base member 2 has a mounting part 5 which mounts the guide member 3 being allowed to be shifted between the first mounting position for forming the cut Ca as made in one direction and the second mounting position for forming the cut Cb as made in the other direction crossing the one direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-cutting treatment which can be suitably used for forming a cross cut on a test piece when performing a grid test or a salt spray test of a paint. It is about tools.

[0002]

2. Description of the Related Art Japanese Industrial Standards (JIS K5400) provide various rules as test methods for properties of paints. Among them, a grid test method is defined as one of the physical property test methods, which forms a coating film on the surface of a test plate having a predetermined rectangular shape, and penetrates this coating film. Cut the cross-cut in the cutting board until it reaches the fabric surface of the test plate with a sharp blade. I have.

[0003] As one of the test methods relating to chemical properties, there is a salt spray test method, in which a coating film is formed on the surface of a rectangular test plate similar to the above and reaches the fabric surface of the test plate. As described above, two cuts crossing at a predetermined angle (30 ° or 60 °) are cut with a sharp blade, and the test piece is set in a salt water spray tester and sprayed with salt water. This is to determine whether rust or blisters or the like occur. In each of the above test methods, when forming a cut in a cross section at a predetermined angle or a grid on the test piece,
Usually, a jig is used to simplify the work.
What is described in JP 89 is conventionally known.

[0004]

The jig of the prior art is formed of a rectangular plate as shown in FIG. 8 (a), and a plate for forming a grid-like cut is formed on the plate surface.
A type of slit group 102 is formed. Each slit group 102 includes a number of slits 103 directed in the same direction.
Are arranged side by side at predetermined intervals (1 mm, 2 mm intervals, etc.). In order to form a grid-like cut using this jig 101, first, with the jig placed on the test piece T, insert the tip of a cutter into each slit 103 to form a plurality of cuts. Thereafter, similar cutting is performed with the jig rotated by 90 °, and a plurality of cross cuts can be easily formed by using the slit 103 as a guide. Was.

[0005] However, since the operation of rotating the jig by 90 ° in the above operation is performed by eye measurement, it is difficult to form a grid that is orthogonal at right angles. It often occurs that the cutting state is different or the eye measurement is erroneously performed and the work must be redone. If accurate cutting cannot be performed, the reproducibility of the test deteriorates and the reliability decreases. In addition, if a cutting leak is found after removing the jig 101 from the test piece T, it is difficult to set the jig 101 again at the same position, so the work must be performed again in such a case. However, this was a cause of deteriorating work efficiency.

On the other hand, the jig 101 is also provided with a structure for forming two cuts crossing at a predetermined angle as test pieces T for a salt spray test. The first stamp 105 crosses the surface of the jig 101 at an angle, the second stamp 106 is perpendicular to the first stamp 105, and the first stamp 105 is inclined at a predetermined angle with respect to the left long side of the jig 101. It is configured by forming a third mark 107, a through hole 108 formed to cross the second mark 106, and a through hole 109 formed to cross the third mark 107.

[0007] Then, as shown in FIG.
8, the second marking 106 of the jig 102 is aligned with the left long side of the test piece T, and the first marking 1 is placed on the lower short side of the test piece T.
Then, while maintaining this state, a straight cut C is formed in the range from engraving A to A using the right long side of the jig 101 as a guide (see FIG. 8C). Next, FIG.
As shown in the figure, the third mark 107 is aligned with the cut C,
In addition, while the end point of the cut C is aligned with the center of the through hole 109, another cut is formed in the range from the stamp C to the seal D using the left long side of the jig 101 as a guide. Two cross cuts can be formed.

However, also in this case, the engraved marks 105 to 107 formed on the jig 101 are replaced with the side of the test piece T or the cut C.
Since the end of the cut C is visually adjusted to the center of the through hole 109, it is difficult to cut at an accurate position at an accurate cross angle. And has almost the same problem. In particular, since the jig 101 has a certain thickness, a step is generated between the inscriptions 105 to 107 on the surface of the jig 101 and the test piece T. In consideration of this step, the indentations 105 to 107 and the test piece T are taken into consideration. It took some skill to visually match the side of T and the like.

The present invention has been made in view of such circumstances, and provides a jig for cross-cutting that can easily and accurately form cuts crossing at a grid or a predetermined angle. Aim.

[0010]

The present invention employs the following technical means to achieve the above object. That is, the present invention is a cross-cutting jig used to form a plurality of cuts crossing each other on a test piece, and a base member set on the test piece, and a guide for forming the cut. With a guide member to make,
The base member can replace the guide member between a first mounted state for forming a cut in one direction and a second mounted state for forming a cut in another direction crossing the one direction. Characterized by having a mounting portion to be mounted on the device.

According to this, first, the guide member is mounted in the first mounting state in a state where the base member is set on the test piece, and a cut in one direction among cross cuts is formed. Thereafter, by removing the guide member and replacing it with the second mounting state, and forming a cut in the other direction,
A plurality of cuts crossing each other can be formed. That is, by mounting the guide member in the first and second mounting states via the mounting portion, it is possible to easily and accurately set the cross angle and arrangement of the cut, thereby reducing work errors and testing. Reproducibility,
It is possible to improve reliability.

Further, if the base member is set on the test piece after the cut is formed, it is possible to re-attach the first or second mounting state even if the guide member is removed. Even if a leak is found, only the leaked portion can be cut again accurately. In the above description, the guide member may form a cut in a grid pattern, or may form two cuts that cross at a predetermined angle. When forming a grid-shaped cut, the mounting portion is formed by a substantially square hole, and the guide member is formed to be a substantially square that can be fitted into the hole of the mounting portion, and the cut is formed. It is preferable to have a configuration having a plurality of slits oriented in the same direction into which the cutting tools for inserting are inserted.

Thus, the guide member is fitted into the mounting portion (mounting hole) to be in the first mounting state, a plurality of cuts are formed through the slits, and then the guide member is rotated by 90 ° and mounted again. By fitting the holes into the second mounting state and forming a plurality of cuts again through the slits, it is possible to easily form a grid-shaped cut that is orthogonal at right angles. The shapes of the guide member and the mounting hole are not limited to a strict square shape, and even if the guide member is rotated by 90 °, the four sides can be fitted along the four sides of the mounting hole. Should be fine.
Therefore, for example, it includes those in which the corners of a square are chamfered in a round shape, a tapered shape, or the like.

The present invention is a cross-cutting jig used for forming a plurality of cuts crossing each other on a test piece, wherein one of the crossed cuts is in contact with or located on an extension of the cut. At least two
A first mark part for marking a point and at least two points where another cut is in contact with or located on an extension of the cut.
And a second mark portion for marking a point. According to this, marking is performed through the first and second mark portions in a state where the jig is set on the test piece, and a cut can be formed using the marked point as a mark.

That is, while the jig is set on the test piece, each point corresponding to both cuts can be directly and simultaneously marked on the test piece. It is possible to set the relative angle and relative position of the cut accurately compared to the case of using as a mark,
As a result, operation errors and the like can be reduced. The point where the cut comes into contact is meant to include not only the point of contact but also the point of passing.

In the above case, the distance between two points marked by the first mark part and the distance between two points marked by the second mark part are set so as to correspond to a predetermined cut length. preferable. Thereby, for example, a cut of a predetermined length can be easily formed only by performing a cutting operation using the marking point as a guide without making a mark or the like as a guide of the cut length on a side of the jig. Become. Further, a jig for cross-cutting according to the present invention includes a base member set on a test piece, and a mark member having the mark portion and detachably attached to the base member. And

By providing the base member and the mark member separately as described above, it is possible to appropriately change the dimensions and the like of the mark member, thereby changing the cross angle and length of the cut. Can be easily realized.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2A, a cross-cutting jig 1 according to an embodiment of the present invention has a base member 2 and a guide member 3. As shown in FIG. 1, the base member 2 is formed in a rectangular shape from a metal plate material such as stainless steel, and has a size equal to a test piece T (150 mm) used for a grid test, a salt spray test, or the like.
× 70 mm).

On the plate surface of the base member 2, three upper and lower mounting portions 5 are formed, and each mounting portion 5 is formed by a substantially square hole (mounting hole). The center mounting hole 5b of each mounting hole 5 is formed such that the center thereof coincides with the center of the base member 2, and the upper and lower mounting holes 5a, 5b.
c is formed at a position evenly spaced from the center mounting hole 5b. One corner of the base member 2 is bent by about 90 ° toward the surface side, and the bent portion 6 is a knob for facilitating picking up the base member 2 by hand.

Further, slits 7 are formed on the left and right sides of the base member 2 so as to extend vertically along the long sides. The slits 7 have a rectangular shape with respect to the measurement paper when a paint hiding ratio test is performed. It guides a cutting tool such as a cutter in order to form a hole (60 mm × 60 mm). As shown in FIG. 2A, the guide member 3 is made of a substantially square plate material that can be detachably fitted to the mounting hole 5, and the plate surface faces in the same direction. A slit group 11 formed by arranging a plurality of slits 10 at predetermined intervals is formed.

In this embodiment, the interval between the slits 10 is 1
mm, 2 mm, 3 mm, and 5 mm in total, and are provided with a total of four types of guide members 3, each having the same shape and capable of being fitted into each mounting hole 5. One corner of each guide member 3 is bent by about 90 ° toward the front side, and the bent portion 12 is a knob. Hereinafter, with reference to FIG. 3, an operation of forming the grid-shaped cuts Ca and Cb using the base member 2 and the guide member 3 will be described.

First, as shown in FIG.
The base member 2 is set on (a surface coated with a predetermined coating film). At this time, the test piece T and the base member 2 are placed so that the corresponding sides (short sides and long sides) of the base member 2 match each other. Further, in order to surely maintain the set state, it is preferable to provide a magnet or the like that can be adhered to the test piece T on the back surface of the base member 2. next,
A desired one of the various guide members 3 is fitted into any of the mounting holes 5. In the illustrated example, slits 10 at 3 mm intervals are used.
The case where the guide member 3 having the above is mounted in the center mounting hole 5b is shown.

At this time, the guide member 3 is positioned at an appropriate position and angle by aligning its four sides with the four sides of the mounting hole 5 (this mounting state is referred to as a first mounting state). . Then, a blade of a cutter (cutting tool) is inserted into each slit 10 of the guide member 3 to form a plurality of cuts Ca in one direction (left-right direction). When this operation is completed, only the guide member 3 is removed while the base member 2 is set on the test piece T, and the guide member is rotated by 90 ° and fitted into the mounting hole 5b again as shown in FIG. 3B. This mounting state is referred to as a second mounting state).

At this time, the guide member 3 is positioned at an appropriate position and angle rotated exactly 90 ° from the first mounting state by the four sides thereof being along the four sides of the mounting hole 5b in the same manner as described above. Will be done. Then, by forming a plurality of cuts Cb in the other direction (up and down direction) using each slit 10 as a guide, grid-like cuts Ca and Cb are formed on the test piece T as shown in FIG. 3C. From the above, in the jig 1 for cross-cutting,
Since the guide member 3 can be accurately rotated by 90 ° with reference to the square mounting hole 5 formed in the base member 2, the cutting operation can be performed easily and accurately without requiring much skill. Errors can be reduced, and the reproducibility and reliability of the test can be improved.

After the cutting, the guide member 3 is removed without removing the base member 2 from the test piece T, so that it is possible to confirm whether or not there is a cutting leak. By setting the guide member 3 in the mounting hole 5, only the leaked portion can be cut accurately.
In the above description, the example in which the grid-shaped cuts Ca and Cb are formed using the center mounting hole 5b is shown, but the same operation can be performed using the upper or lower mounting holes 5a and 5c. Needless to say.

Further, by fitting the guide members 3 having different slit intervals into any two of the mounting holes 5 or all of the mounting holes 5, a plurality of types of grids can be formed on one test piece T. It is also possible to make eye cuts Ca and Cb. As shown in FIGS. 1 and 4, the base member 2 is formed with mark portions 15a and 15b for making two cuts Ca and Cb crossing each other at a predetermined angle (60 °). The marks 15a and 15b are respectively provided on the lower side of the upper mounting hole 5a and the upper side of the lower mounting hole 5c.
Each of the mark portions (the first mark portion 15a,
The bending points Pa and Pb of the second mark portion 15b) are arranged on a line passing through the center O of the base member 2 and are formed at equal intervals from the center O.
The interval between the bending points Pa and Pb of a and 15b is set to be the same as the length of the predetermined cuts Ca and Cb.

Hereinafter, with reference to FIG.
The cutting operation using 5b will be described. First, as shown in FIG. 4A, the base member 2 is set on the test piece T in the same manner as in the case of the grid cut, and the base member 2 is placed on the test piece T via the four mark portions 15a and 15b. The marks Ma and Mb in the shape of a letter "K" are written in the box with a pencil or the like.
Next, as shown in FIG. 4B, the side (long side) of the base member 2 is aligned with each bending point Mp of a pair of marks Ma obliquely facing each other, and the bending point Mp is set using the side as a guide. One cut Ca is formed by cutting the gap.

When the same operation is performed for the other set of marks Mb, cuts Ca and Cb crossing at a predetermined angle are formed as shown in FIG. 4C. From the above, in the jig 1 for cross-cutting, the mark Ma corresponding to both of the two cuts Ca and Cb is provided via the mark portions 15a and 15b of the base member 2 set on the test piece T. , Mb can be marked simultaneously and directly, so that the relative angle of each cut Cb can be set accurately, and the cross point can be arranged at the center position of the test piece T. .

Further, by cutting between the bending points Mp of the marks Ma and Mb, the lengths of the cuts Ca and Cb can be made accurate and constant, and the cuts Ca and
A predetermined distance between the end of Cb and the side of the test piece T can be ensured. Further, the marks Ma and Mb having the inflection points Mp can be formed by the mark portions 15a and 15b formed by the "-" shaped notches, so that the points (Ma and Mb) serving as the marks of the cuts Ca and Cb can be formed. It is clearly recognizable. In addition, the said mark part 15a,
15b, marks Ma and Mb are drawn at positions where the end points of the cuts Ca and Cb are in contact with each other.
Marks Ma and Mb may be drawn at positions where Cb passes and positions on the extension of cuts Ca and Cb. Also,
In the above description, two points corresponding to the cuts Ca and Cb are marked, but three or more points may be marked.

The mark portions 15a, 15a described above
Is for forming cuts Ca and Cb crossing at 60 °. In the present embodiment, as shown in FIGS. 2B and 5, cuts Ca and Cb crossing at 30 ° are formed.
Are separately provided. The mark member 17 is formed in a chip shape having a rectangular shape (rectangular shape) smaller than the mounting hole 5, and four mark members having the same shape are provided. Then, FIG.
As shown in the figure, one corner of each mark member 17 is positioned so as to be adapted to the right and left upper corners of the upper mounting hole 5a and the left and right lower corners of the lower mounting hole 5c. Are used as the mark portions 15a and 15b.

At this time, each of the mark portions obliquely facing each other (first
Mark portion 15a, bending point Pa of second mark portion 15b),
Pb is arranged on a line passing through the center of the base member 2 and is arranged at equal intervals from the center. Further, the interval between the bending points Pa and Pb of the mark portions 15a and 15b is
The length is set to be the same as the length of the predetermined cut Ca, Cb. Then, in substantially the same manner as when forming a 60 ° cross cut, L-shaped marks Ma and Mb are written on the test piece T using the mark portions 15a and 15b, and the side of the base member 2 is used. Each mark M facing diagonally
By cutting between the bending points Mp of a and Mb, the cuts Ca and Cb crossing at 30 ° can be formed easily and accurately.

The mark member 17 has at least one
In this case, the marking may be performed while replacing the mark member 17 at an appropriate position of the upper or lower mounting hole 5. Further, by changing the size of the mark member 17, it is also possible to change the cross angle and the length of the cuts Ca and Cb. 30 ° on the long side of the base member 2
The cuts of the cloth and the indicia K1 and K2, which are used as indications of the length of the cut of the 60 ° cross, are formed.
It can be confirmed whether or not the interval between the bending points Mp of a and Mb is set to a predetermined value.

Further, the cuts Ca and Cb can be formed to have a predetermined length by cutting using the inscriptions K1 and K2 as a guide. FIG. 6 shows a second embodiment of the present invention. In the present embodiment, one mounting hole 5 is formed in the center of the base member 2, and a guide member 3 </ b> A in which a slit group 11 for a grid-like cut formed in the mounting hole 5 is formed. And a guide member 3B formed with a slit 18 for a cut to be crossed.

The guide member 3A for a grid cut is used in substantially the same manner as in the first embodiment.
The guide member 3B for a cut which crosses at an angle is switched between a first mounting state in which the mounting member 5 is fitted in the mounting hole 5 as shown in the drawing and a second mounting state in which the mounting member 5 is fitted in the inverted state. By forming a cut through the slit 18 in the first and second mounting states, a cut crossed at 60 ° can be formed easily and accurately. In addition, above and below the base member 2,
Marks 15a, 15b for cuts crossing at 30 °
Are formed, and the mark portions 15a and 15b are formed as slits bent in the shape of a “<”.

Then, by marking the test piece T using the mark portions 15a and 15b, the first
As in the embodiment, cuts crossed at 30 ° can be formed. The present invention is not limited to the above-described embodiment, and can be appropriately changed in design. For example, the mounting hole 5 and the guide member 3 are not limited to being formed in a substantially square shape.
Can be formed in a shape that can be fitted, for example, a polygonal shape such as a regular octagon, a regular dodecagon, or a circle.

When the mounting hole 5 and the guide member 3 are formed in a circular shape, as shown in FIG. 7, in the first and second mounting states, it is necessary to form a projecting piece 20 and a concave portion 21 which engage with each other. Preferably, the concave portion 21 is provided with the mark portion 1.
It is also possible to configure as 5a and 15b. Also,
In the first embodiment, the mark portions 15a and 15b can be formed in a protruding piece shape protruding into the mounting hole 5.
The interval between the slits 10 of the guide member 3 for a grid cut is not limited to the above-described embodiment, and may be any as long as at least one type of guide member 3 is provided.

In the jig of the above embodiment, it is possible to form both a cut-like cut and a cut crossing at 60 ° and 30 °. It can be configured as a separate jig. The cross angle of the cut is 90 ° (orthogonal), 6
The angle can be changed as appropriate without being limited to 0 ° and 30 °.

[0038]

As described above in detail, according to the jig for cross-cutting according to the present invention, it is possible to accurately and easily form a cross cut, thereby reducing operation errors. At the same time, the reproducibility and reliability of the test can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a base member of a cutting jig according to a first embodiment of the present invention.

FIG. 2A is a front view of a guide member, and FIG. 2B is a front view of a mark member.

FIG. 3 is a front view showing a procedure for forming a grid-shaped cut;

FIG. 4 is a front view showing a procedure for forming a cut crossing at 60 °.

FIG. 5 is a front view showing a procedure for forming a cut crossing at 30 °.

FIG. 6 is a front view showing a cutting jig according to a second embodiment of the present invention.

FIG. 7 is a partial front view showing a cutting jig according to another embodiment.

8A and 8B show a cross-cutting jig according to the related art, in which FIG. 8A is an overall front view, and FIGS. 8B to 8D are front views showing procedures for forming a cross cut.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cross-cutting jig 2 Base member 3 Guide member 10 Slit 15 Mark part 17 Mark member

Claims (5)

[Claims] 1. A plurality of cuts (Ca,
A jig for cross-cutting used for forming Cb) on a test piece (T), comprising: a base member (2) set on the test piece (T); and forming the cut (Ca, Cb). A guide member (3) for guiding when the guide member is mounted, wherein the base member (2) is in a first mounting state for forming a cut (Ca) in one direction on the guide member (3); Cuts in the other direction that cross in one direction (C
A jig for cross-cutting, comprising: a mounting portion (5) that is removably mounted in a second mounting state for forming b). 2. The mounting part (5) is formed by a substantially square hole, and the guide member (3) is provided by the mounting part (5).
It is formed in a substantially square shape that can be fitted into the hole of
A plurality of slits (10) oriented in the same direction into which cutting tools for forming the cuts (Ca, Cb) are inserted.
The jig for cross-cutting according to claim 1, comprising: 3. A plurality of cuts (Ca,
A cross-cutting jig used for forming Cb) on a test piece (T), wherein at least two points where one of the cuts (Ca) is in contact with or located on an extension of the cross cuts. A first mark portion (15a) for marking, and a second mark portion (15b) for marking at least two points at which the other cut (Ca) is in contact with or located on an extension thereof. A jig for cross-cutting. 4. The cut (Ca, C) between two points marked by a first mark part (15a) and between two points marked by a second mark part (15b).
4. The jig according to claim 3, wherein the jig corresponds to a predetermined length of b). 5. A mark member (17) having a base member (2) set on a test piece (T) and said mark portions (15a, 15b) and removably mounted on said base member (2). The jig for cross-cutting according to claim 3 or 4, wherein: