JP3456757B2 - Cut forming tool for coating adhesion test - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cut forming tool used for forming a grid-like cut in a coating film to test the adhesion of the coating film. . [0002] As a simple method for testing the adhesion of a coating film,
The crosscut method and the crosscut tape method are specified in JIS.
An example of the grid pattern method is to use a coating film T as shown in FIGS.
11 cuts k (cut interval 1)
mm) is to evaluate the adhesion by the ratio of the area of the peeled portion h of the coating film when 100 cross-cuts are formed by making the cross-cuts perpendicular to each other vertically and horizontally. An example of the cross-cut tape method is described above. A cellophane adhesive tape is applied to the surface of the coating film T on which the cut-like cuts are formed as described above, and after one to two minutes, the coating when the coating surface is instantaneously peeled off in a right angle direction while holding one end of the tape The adhesion is evaluated based on the ratio of the peeled area of the film. [0003] Conventionally, in any of the above-described test methods, when forming a grid-like cut in a coating film,
First, a cutter guide 01 as shown in FIGS. 6 and 7 is placed on the coating film T surface. This cutter guide 01 has eleven slits 03 defined by twelve scale plates 02,
03 ‥, and a cutter knife 04 is sequentially inserted into these slits to make a cut k on the coating film T by one line.
When 11 cuts are made, the cutter guide 01
Are turned 90 °, and eleven cuts perpendicular to the cuts are made in the same manner. [0004] By the way, in order to form a grid-like cut in a coating film as described above, the cutter knife must be operated many times, which requires a considerably long working time. In addition to the above, it is difficult to keep the conditions for forming each cut, that is, the pressure of the cutting edge against the coating surface, the cutting speed, and the like constant, and there is a problem that the test results tend to vary. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and is capable of easily and quickly forming a grid-like cut in a coating film while keeping the conditions for forming the cuts constant. It is an object of the present invention to provide a test cutting tool. [0006] In order to achieve the above-mentioned object, the present invention provides a cut-forming tool for coating adhesion test, comprising a plurality of prescribed cutter knives each having a large number of break lines; A spacer interposed between the cutter knives so as to regulate an interval between the cutter knives, and a securing means for securing the cutter knives and the spacers in a stacked state by aligning the cutting edges of the cutter knives. The securing means includes a pair of holding plates that are superimposed on each outer surface of the cutter knives located on both outermost sides, a positioning pin that is fitted into a locking hole of each cutter knife and supported by the both holding plates, and a pair of holding plates. Each spacer and both holding plates are provided with a plurality of pin holes in which the positioning pins can be selectively fitted in the longitudinal direction, and the clamp is provided with a cutter knife. A pair of clamp plates hinged to one side of the group so as to be openable and closable with each other, and clamp bolts connecting the free ends of these clamp plates to each other on the other side of the cutter knife group. When the two clamp plates are closed by tightening the bolts, the cutter knife and the spacer are clamped via the holding plate. An embodiment of the present invention will be described below with reference to the drawings. 1 to 3, a cutting tool 1 according to the present invention is provided with eleven cutter knives 2, 2,... And interposed between the cutter knives 2, 2,. 10 spacers 3, 3 ... 1.0 mm
, And the spacers 3, 3,... Are secured in a stacked state by securing means 4 with their cutting edges aligned. Each of the cutter knives 2 is a well-known cutter having a large number of breaking lines 5, 5... For breaking the blade to reveal a new cutting edge, and one locking hole 6 at the rear end. As shown in FIG. 4, the securing means 4 comprises a pair of pressing plates 7, 8 which are superimposed on each outer surface of the outermost cutter knives 2 in the group of cutter knives 2, 2,.
A positioning pin 9 fitted into the locking hole 6 of each cutter knife 2 and supported by the holding plates 7, 8;
And a clamp 10 for clamping the pressure. A large number of pin holes 11, 12, 13 into which the positioning pins 9 can be selectively fitted are formed in the spacers 3, 3... A recess 14 for receiving the enlarged head 9 a of the positioning pin 9 is provided on the outer side of each pin hole 12 of the holding plate 7. Referring again to FIG. 1 and FIG.
Are a pair of clamp plates 16, 17 hingedly connected to one side of a group of cutter knives 2, 2,.
And clamp bolts 18 connecting the free ends of these clamp plates 16, 17 to each other on the other side of the group of cutter knives 2, 2,...
Can press the holding plates 7 and 8 when it is closed. Next, the operation of this embodiment will be described. In using the cutting tool 1, as shown in FIG. 5, the user holds the clamp 10 so that all the cutting edges of the eleven cutter knives 2, 2,...ま で, cut a predetermined length in one direction
By making cuts k, k... Of the stripes and then performing the same operation at right angles to them, 100 as shown in FIG.
A grid-like cut is formed on the coating film T. The method of evaluating the adhesion of the coating film thereafter is no different from the conventional method. Thus, by using the cutting tool 1 of the present invention,
Since only 100 cuts can be formed on the coating film T by performing only two cutting operations, the forming operation can be performed easily and quickly without using a conventional cutter guide. Since a predetermined number of cuts are formed at once, the conditions for forming each cut, such as the blade pressure and the cutting speed, can be made the same, and the accuracy of the coating film adhesion test is improved. Further, according to the cutting tool 1 of the present invention, a grid-like cut can be formed even on a slightly curved portion of the coating film T surface, and the adhesion test of the coating film can be performed. If the cutting edges of the cutter knives 2, 2,... Are worn, the clamp bolts 18 are loosened, the clamp plates 16, 17 are opened, and the cutter knives 2, 2,. Break along the break line 5 to reveal a new cutting edge. Along with this, the cutter knife 2, 2
... When the length of the group becomes short, the positioning pins 9 are removed, and then the positions of the spacer 3 and the holding plates 7, 8 are shifted rearward with respect to the group of cutter knives 2, 2,. Locking holes 6 and the corresponding pin holes 1
The positioning pins 9 are inserted into 1, 12, and 13 , the clamp plates 16 and 17 are closed again, and the clamp bolts 18 are retightened. Thus, a cutting tool 1 in which new cutting edges of the cutter knives 2, 2,... Are aligned can be obtained. In the above embodiment, various design changes can be made without departing from the gist of the present invention. For example, according to JIS, in order to form 25 grid-shaped cuts, six cutter knives 2 and a spacer 3 having a cutter knife spacing of 2 mm are mounted on one blade 1, and nine cut knives 2 are provided. In the case of forming a grid-like cut, four cutter knives 2 and a spacer 3 having a space between the cutter knives of 5 mm are mounted on one blade 1. As described above, according to the present invention, a prescribed number of cutter knives, a spacer interposed between the cutter knives to regulate the interval between the cutter knives, the cutter knife And the securing means for securing the spacers in a stacked state by aligning the blade edges of the cutter knives, so that a predetermined number of grid-like cuts are formed by performing two cutting operations in which the cutting directions are orthogonal to each other. Can be formed on the coating film, eliminating the need for the conventional cutter guide. Together with this, the cut formation operation can be performed easily and quickly , and the coating conditions are the same for each cut. Can improve the accuracy of the adhesion test. In particular, the securing means comprises a pair of pressing plates which are superimposed on each outer surface of the outermost cutter knives, and a positioning member which is fitted into a locking hole of each cutter knife and supported by the both pressing plates. A pin and a clamp for clamping both holding plates are provided.A plurality of pin holes into which positioning pins can be selectively fitted are formed in each spacer and both holding plates in a line in the longitudinal direction. A pair of clamp plates hinged to one side of the group of cutter knives so as to be openable and closable with each other, and clamp bolts connecting the free ends of the clamp plates to each other side of the group of cutter knives. The plate can press the cutter knife and the spacer via the holding plate when both clamp plates are closed by tightening the clamp bolt. If the blades of the group of cutter knives are worn, loosen the clamp bolts, open both clamp plates, take out the group of cutter knives, and break their leading blades along the break line to reveal a new blade. When the length of the cutter knife group is shortened accordingly, the positioning pins are removed, and then the positions of the spacer and the holding plate are shifted rearward with respect to the cutter knife group, and the engaging holes of the cutter knife group are removed. If a positioning pin is inserted into the pin hole corresponding to them and the clamp plate is closed again to retighten the clamp bolt, a new cutting edge of the cutter knife group can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a cut forming tool according to an embodiment of the present invention. FIG. 2 is a plan view of FIG. 1. FIG. 3 is a front view of FIG. FIG. 5 is a sectional view taken along the line 4-4. FIG. 5 is an explanatory view of how to use the cutting tool. FIG. 6 is a plan view of a cutter guide conventionally used for forming a cut. FIG. 8: Illustration of adhesion test method of coating film by cross-cut method [Explanation of reference numerals] 1 ... cutting tool 2 ... cutter knife 3 ... spacer 4 ... securing means 5 ... ... Breaking lines 7, 8 ... Holding plate 6 ... Locking hole 9 ... Positioning pin 10 ... Clamp 11, 12, 13 ... Pin hole 15 ... Hinge connection 16, 17 ... … Clamp plate 18 …… Clamp bolt

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 51-123887 (JP, U) JP-A 62-93968 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B26B 1/00-11/00 B26B 23/00-29/04

Claims (1)

(1) A plurality of cutter knives (2) each having a large number of break lines (5), and the cutter knives (2) are provided with a plurality of cutter knives (2) so as to regulate a distance between the cutter knives (2). A plurality of spacers (3) interposed therebetween, and a securing means (4) for securing the cutter knife (2) and the spacer (3) in a stacked state by aligning the cutting edges of the cutter knives (2). The securing means (4) is composed of a pair of holding plates (7, 8) superposed on each outer surface of the cutter knife (2) located on both outermost sides.
And a positioning pin (9) which is fitted into the locking hole (6) of each cutter knife (2) and is supported by both holding plates (7, 8).
And a clamp (10) for pressing the holding plates (7, 8), and a positioning pin (9) is selectively fitted to each spacer (3) and the holding plates (7, 8). Multiple pin holes (1
1, 12, 13) are drilled side by side in the longitudinal direction, and the clamp (10) has a pair of clamp plates (16) hinged (15) to be openable and closable on one side of a group of cutter knives (2). , 17) and these clamp plates (16,
17) and clamp bolts (18) for connecting the free ends of the cutter knives (2) on the other side of the group of cutter knives (2).
At the time of closing both clamp plates (16, 17) by tightening of 8), the cutter knife (2) via the holding plate (7, 8)
And a cutting tool for applying a coating film adhesion test, wherein the cutting tool has a pressure.