Metal Plate Evaluation Equipment

Abstract

To provide a metal plate evaluation tool that can evaluate the feathering properties of a laminated metal plate without performing can manufacturing processing.SOLUTION: A metal plate evaluation tool is used for evaluation of feathering properties of a laminated metal plate in which a resin film is laminated on a metal plate. The metal plate evaluation tool comprises: a first member that has a sample installation part on which the laminated metal plate is installed; a second member that has a can opening blade provided at a position corresponding to the sample installation part; and a moving mechanism that brings the second member closer to the first member. The sample installation part has a slit into which the can opening blade is inserted when the second member is brought closer to the first member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a metal sheet evaluation device for evaluating the feathering properties of a laminated metal sheet in which a resin film is laminated on a metal sheet. [Background technology]

[0002] Conventionally, can materials have been made from metal materials decorated by painting and baking onto metal sheets. There is a demand for streamlining the manufacturing process of conventional metal materials by eliminating the painting and baking process. Furthermore, there are demands for conventional metal materials to reduce their environmental impact by eliminating the drying process (baking process) of the solvent used in painting, and to avoid the leaching of environmental hormones such as BPA (Bisphenol A) contained in paints.

[0003] Therefore, in recent years, laminated metal sheets, which are made by laminating a resin film onto a metal sheet, have been used as can materials instead of conventional metal materials. In particular, there is a risk that BPA, even in small amounts, may have an adverse effect on the human body, so its use may be restricted. Furthermore, since the amount of BPA leaching is greater in food cans than in beverage cans, it is expected that the use of laminated metal sheets will also be promoted in the food can field in the future.

[0004] Laminated metal cans are required to have sufficient openability to prevent feathering, a phenomenon in which a film remains like a feather when the can is opened. As a method for improving feathering, for example, Patent Document 1 discloses a polyester resin-coated aluminum alloy sheet in which a polyester resin film consisting of an adhesive layer and an orientation layer on the opposite side of the adhesive layer is coated on the surface of the aluminum alloy sheet.

[0005] Additionally, some customers may conduct special tests, such as opening a can while it is still heated, in anticipation of customers who heat the food in the can, and it is difficult to meet all requirements within the limited standards and man-hours required. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-122577 Summary of the Invention [Problem to be solved by the invention]

[0007] Feathering is evaluated, for example, by forming a can from the manufactured prototype material, filling it with the contents, seaming it, etc., and then opening the can with a can opener. However, if you do not have can-forming equipment, you have to ask a can manufacturer to perform these processes.

[0008] Furthermore, in Patent Document 1, a V-tear test is performed as an evaluation test for feathering. Specifically, two parallel linear incisions are made in a resin-coated aluminum alloy sheet, and the surface to be evaluated along the incisions is scratched to the extent that the film is cut. The portion between the incisions is bent and immersed in water at 55°C for 30 minutes, and then the portion between the incisions is torn in water to form a V-shaped tear. The film remains peeled from the evaluation surface in the tear. Feathering is evaluated based on the peeling ratio of the film, which is calculated using the area of ​​the entire tear area and the area of ​​the peeled film.

[0009] The V-tear test described in Patent Document 1 may not be able to accurately evaluate feathering because the film breaks in a manner different from that which occurs when a can is opened using a can opener blade.

[0010] The present invention has been made to solve the above-mentioned problems, and aims to provide a metal sheet evaluation device that can evaluate the feathering properties of laminated metal sheets without performing a can manufacturing process. [Means for solving the problem]

[0011] In order to solve the above problems, the present invention has the following features.

[0012] [1] A metal plate evaluation device used to evaluate the feathering property of a laminated metal plate in which a resin film is laminated on a metal plate, a first member having a sample placement portion on which the laminated metal plate is placed; a second member having a can opener blade provided at a position corresponding to the sample placement portion; a moving mechanism that moves the second member closer to the first member, The metal plate evaluation device, wherein the sample mounting portion has a slit into which the can opener blade is inserted when the second member approaches the first member. [2] The second member has an angle adjustment means for adjusting an insertion angle of the can opener blade relative to the slit, The metal plate evaluation instrument according to [1], wherein the can opener blade is provided on the second member via the angle adjustment means. [3] The sample placement section is formed in a vessel shape having a wall section, The metal plate evaluation tool according to [1] or [2], wherein the wall portion of the sample setting portion has a guide mechanism that guides the direction of movement of the can opener blade. [4] The first member and the second member are formed in a lever shape, the moving mechanism has a rotation shaft provided on one end side of the first member and the second member, The metal plate evaluating instrument according to any one of [1] to [3], wherein the first member and the second member are connected to each other so as to be rotatable around the axis of the rotation shaft. [Effects of the Invention]

[0013] According to the present invention, the movement mechanism can bring the second member closer to the first member. By bringing the second member closer to the first member, the can opener blade provided on the second member can pierce the laminated metal sheet placed on the sample placement section of the first member. In this case, the movement of the second member closely resembles the can opening action of a can opener blade, making it possible to reproduce the material damage caused by the can opener, thereby improving the accuracy of evaluating the feathering properties of the laminated metal sheet. Furthermore, by using the metal sheet evaluation device of the present invention, it is possible to evaluate the feathering properties of the laminated metal sheet without processing it into a can body. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 2 is a front view of the metal plate evaluation device. [Figure 2] FIG. 2 is a cross-sectional view of the lower lever taken along line AA in FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. 1 is an explanatory diagram showing an aspect of evaluation of feathering properties of a laminated metal sheet using a metal sheet evaluation instrument. [Figure 7] FIG. 1 is an explanatory diagram showing an aspect of evaluation of feathering properties of a laminated metal sheet using a metal sheet evaluation instrument. [Figure 8] FIG. 10 is a cross-sectional view of a lower lever in a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0015] A metal plate evaluation instrument according to one embodiment of the present invention will be described below with reference to the drawings. Fig. 1 shows the overall configuration of the metal plate evaluation instrument. As shown in Fig. 1, the metal plate evaluation instrument 100 has a rod-shaped lower lever 10 and a rod-shaped upper lever 20 connected to the lower lever 10.

[0016] The lower lever 10, which serves as a first member, has a sample placement section 11 provided at one end side (hereinafter also referred to as the tip side) of its shaft in the axial direction. The lower lever 10 is connected at its tip section 12 to an upper lever 20, which serves as a second member, via a lever rotation shaft 30. The lever rotation shaft 30 is provided so that its axis is positioned along a direction perpendicular to the axial direction of the lower lever 10 when the metal plate evaluation instrument 100 is viewed from the front. The upper lever 20 is provided so as to be rotatable around the lever rotation shaft 30 along a trajectory indicated by a dashed line in the figure. The lever rotation shaft 30 functions as a movement mechanism that moves the upper lever 20 closer to the lower lever 10.

[0017] The upper lever 20 has a can opener blade 21 provided between its axial tip and base ends. The can opener blade 21 is provided at a position corresponding to the sample setting part 11. Specifically, the can opener blade 21 is provided at a position that comes into contact with the sample setting part 11 when the upper lever 20 rotates to approach the lower lever 10.

[0018] The can opener blade 21 is connected to the upper lever 20 via a can opener blade rotation shaft 22 provided on the upper lever 20. As the can opener blade 21, for example, a blade used in a commercially available can opener can be used.

[0019] The can opener blade pivot shaft 22 is arranged so that its axis is positioned in a direction perpendicular to the axial direction of the upper lever 20 when the metal plate evaluation device 100 is viewed from the front. In this embodiment, the can opener blade 21 and the can opener blade pivot shaft 22 are connected to each other via a rod-shaped connecting part 23. The can opener blade 21 is arranged to be rotatable around the axis of the can opener blade pivot shaft 22 along the trajectory indicated by the two-dot chain line in the figure.

[0020] The lower lever 10 and the upper lever 20 are preferably formed from a material with excellent heat resistance, such as metal or heat-resistant resin. By using such a material for the lower lever 10 and the upper lever 20, it becomes possible to maintain the temperature of the desired test environment (for example, a high temperature). Materials with excellent heat resistance include, but are not limited to, metals such as ordinary steel, which is a steel material used for general purposes, stainless steel, aluminum, titanium, copper, brass, and zinc alloy, and resins such as polycarbonate, nylon, polyacetal, and bakelite.

[0021] Fig. 2 shows a cross section of the lower lever 10 taken along line AA in Fig. 1. As shown in Fig. 2, the sample mounting portion 11 of the lower lever 10 is formed into a vessel shape with a wall portion and a bottom portion. The bottom portion of the sample mounting portion 11 has a slit 13 formed therethrough. A laminated metal plate 40, which is made by laminating a resin film onto a metal plate, is placed on the slit 13 at the bottom portion of the sample mounting portion 11.

[0022] The lower lever 10 has a shaft hole 14 at its tip end, through which the lever pivot shaft 30 can be inserted. The shaft hole 14 penetrates the metal plate evaluation instrument 100 in a direction perpendicular to the axial direction of the lower lever 10 when viewed from the front. It is desirable to ensure that the lower lever 10 has a sufficient axial length, assuming that the test will be performed in a high-temperature environment, such as in hot water. By ensuring a sufficient axial length, the user can be prevented from being burned by touching a high-temperature object. Specifically, the test can be performed by immersing the sample mounting portion 11 together with the sample in hot water and operating the upper lever 20 and lower lever 10, which are outside the water.

[0023] Fig. 3 shows the top surface of the lower lever 10. As shown in Fig. 3, the sample setting portion 11 of the lower lever 10 is formed in a circular shape when viewed from above. A slit 13 is formed in the bottom of the sample setting portion 11. A can opener blade 21 is inserted into the slit 13 when the upper lever 20 and the lower lever 10 approach each other.

[0024] The width of the slit 13 is preferably 3.5 mm or more and 16.5 mm or less, and more preferably 4.0 mm or more and 10.0 mm or less. If the width of the slit 13 is less than 3.5 mm, the laminated metal sheet 40 is destroyed by shearing, which makes the film more likely to tear and tends to result in excessively small feathering.

[0025] Furthermore, if the width of the slit 13 is smaller, the clearance between the can opener blade 21 and the slit 13 becomes smaller, and the force required to cut into the laminated metal sheet 40 becomes larger, which is not preferable.

[0026] If the width of the slit 13 exceeds 16.5 mm, the deformation of the laminated metal sheet 40 will be gentler than when opening a can with a commercially available can opener. As a result, the film of the laminated metal sheet 40 will stretch and become more difficult to cut, and the amount of film remaining after cutting (feathering) will tend to be greater than when opening a can with a commercially available can opener. Also, if the clearance between the can opener blade 21 and the slit 13 is large, the laminated metal sheet 40 will bend significantly, which is undesirable.

[0027] The slit 13 is formed so that the can opener blade 21 can be inserted therethrough, and in this embodiment, is formed in a rectangular shape when viewed from above.

[0028] 3, four drain holes 15 are formed through the bottom of the sample setting section 11. By forming the drain holes 15 at the bottom of the sample setting section 11, for example, when a test is performed in a thermostatic bath filled with warm water or the like, it is possible to drain warm water that has entered the sample setting section 11 to the outside.

[0029] Fig. 4 shows the front of the upper lever 20. As shown in Fig. 4, a shaft hole 24 is provided at the tip side of the upper lever 20, through which the lever rotation shaft 30 can be inserted. The shaft hole 24 is formed so as to penetrate in a direction perpendicular to the axial direction of the upper lever 20 when the metal plate evaluating instrument 100 is viewed from the front.

[0030] For example, two axial holes 24 may be provided in a direction perpendicular to the axial direction. That is, the periphery around which the axial holes 24 are formed may be formed in a bifurcated shape that can sandwich the axial hole 14 of the lower lever 10. Therefore, by arranging the axial hole 14 of the lower lever 10 between the two axial holes 24 of the upper lever 20 and inserting the lever rotation shaft 30, the lower lever 10 and the upper lever 20 can rotate around the lever rotation shaft 30. That is, by using the upper lever 20 as the point of force and the lever rotation shaft 30 as the fulcrum, force can be efficiently applied to the sample, which is the point of action, using the principle of leverage.

[0031] The upper lever 20 is provided with a shaft hole 26 formed so that the can opener blade pivot shaft 22 can be inserted therethrough. The shaft hole 26 is formed to penetrate the metal plate evaluation instrument 100 in a direction perpendicular to the axial direction of the upper lever 20 when viewed from the front.

[0032] For example, two axial holes 26 may be provided in a direction perpendicular to the axial direction. That is, the area surrounding the axial holes 26 may be formed concavely so that the axial hole (not shown) of the connection part can be sandwiched therein. Therefore, by arranging the axial hole of the connection part between the two axial holes 24 of the upper lever 20 and inserting the can opener blade pivot shaft 22, the connection part 23 and the can opener blade 21 can rotate around the can opener blade pivot shaft 22. That is, when the upper lever 20 rotates, the angle of the can opener blade 21 can be adjusted so that the can opener blade 21 is positioned vertically downward. Thus, the upper lever 20 has the can opener blade pivot shaft 22 as an angle adjustment means for adjusting the insertion angle of the can opener blade 21 relative to the slit 13 of the sample placement part 11.

[0033] A flange 25 is formed between the connecting portion 23 and the can opener blade 21, extending outward from the circumferential surface of the connecting portion 23. The flange 25 is formed to correspond to the shape of the wall of the sample setting portion 11. In this embodiment, the flange 25 is formed in a disk shape. The diameter of the flange 25 is preferably formed to be approximately the same as the diameter of the wall of the sample setting portion 11. By forming the flange 25 in this manner, the wall of the sample setting portion 11 can function as a guide mechanism that guides the moving direction of the can opener blade 21.

[0034] Figure 5 shows the underside of the upper lever 20. As shown in Figure 5, the can opener blade 21 is attached to the mounting plate 27. The can opener blade 21 is attached to the mounting plate 27 by welding, for example. The manner in which the can opener blade 21 is attached to the mounting plate 27 is not particularly limited, and the can opener blade 21 may be attached to the mounting plate 27 using, for example, an adhesive or a fixing bolt and nut.

[0035] The mounting plate 27 is preferably formed to be smaller than the outer shape of the flange 25. By forming the mounting plate 27 in this way, it is possible to prevent interference with the movement of the flange 25 in the sample setting section 11.

[0036] In this embodiment, the mounting plate 27 is attached to the flange 25 by four bolts 28. Because the mounting plate 27 is removably attached to the flange 25 in this manner, the can opener blade 21 can be easily replaced simply by replacing the mounting plate 27.

[0037] Furthermore, for example, by attaching a mounting plate 27 using a can opener blade 21 from a commercially available can opener tool to the flange 25, it is possible to obtain even more accurate reproducibility. Furthermore, by attaching a mounting plate 27 using a can opener blade 21 in a shape or condition that meets the customer's needs to the flange 25, it becomes possible to easily change the test environment. The manner in which the mounting plate 27 is attached to the flange 25 is not particularly limited; for example, the mounting plate 27 may be attached to the flange 25 using an adhesive.

[0038] 6 and 7 show an aspect of evaluating the feathering property of a laminated metal plate 40 using the metal plate evaluation instrument 100. As shown in Fig. 6, when evaluating the feathering property of the laminated metal plate 40, the laminated metal plate 40 is placed at the bottom of the sample placement section 11.

[0039] The laminated metal plate 40 is preferably formed in a shape corresponding to the bottom of the sample setting section 11. In this embodiment, the laminated metal plate 40 is preferably formed in a disk shape. By forming the laminated metal plate 40 in this manner, it is possible to prevent the laminated metal plate 40 from shifting when the can opener blade 21 is inserted through the laminated metal plate 40.

[0040] Next, the upper lever 20 is rotated so that it approaches the lower lever 10. At this time, the can opener blade 21 rotates around the can opener blade rotation shaft 22, and its angle is adjusted so that it is positioned vertically below. The flange 25 also moves along the wall of the sample setting section 11, guiding the movement of the can opener blade 21. Therefore, the can opener blade 21 contacts the surface of the laminated metal plate 40 at a perpendicular angle.

[0041] As shown in Figure 7, when the upper lever 20 is further moved closer to the lower lever 10, the can opener blade 21 is inserted into the laminated metal plate 40. At this time, the can opener blade 21 is inserted into the laminated metal plate 40 along the arc shown in Figure 7. After the can opener blade 21 has been inserted into the laminated metal plate 40, the amount of film remaining (feathering amount) is measured and an evaluation is made according to that length.

[0042] At this time, the laminated metal sheet 40 is pressed and fixed by the flange 25, so the can opener blade 21 is inserted without bending the laminated metal sheet 40. In addition, the contact portion of the laminated metal sheet 40 with the can opener blade 21 is firmly supported by the members surrounding the slit 13, so the force of the can opener blade 21 can be applied in a concentrated manner without being dispersed around the contact portion. This makes it possible to evaluate the feathering property of the laminated metal sheet 40 in its plate form without forming it into a can body.

[0043] In this way, by inserting the can opener blade 21 into the laminated metal sheet 40, the can opener blade 21 can be operated in the same way as opening a can with a can opener. This makes it possible to evaluate the feathering properties with high accuracy even for sheet material before can-making.

[0044] The metal plate evaluation tool 100 can also be used underwater. For example, the laminated metal plate 40 may be pierced in water heated to a high temperature. When the metal plate evaluation tool 100 is used underwater in this manner, water is discharged through the drain hole 15, so that the laminated metal plate 40 can be easily pierced with the can opener blade 21 even underwater.

[0045] (Variation) In the above embodiment, an example has been described in which the slit 13 is formed in the bottom of the sample setting portion 11. The metal plate evaluating instrument 100 may have an adjustment means capable of adjusting the opening shape of the slit 13.

[0046] 8 shows a cross section of the lower lever 10 in the modified example. At the bottom of the sample setting section 11, a support section 11b is formed in a ring shape so as to surround the periphery of the slit 13.

[0047] A plate 16 is placed on the support portion 11b. The plate 16 is formed in a plate shape corresponding to the bottom of the sample mounting portion 11. In this modification, the plate 16 is formed in a disk shape. A slit shape adjustment hole 17 is provided in the center of the plate 16, penetrating it in the thickness direction. The slit shape adjustment hole 17 is formed, for example, to have a smaller opening area than the slit 13. By preparing plates 16 with slit shape adjustment holes 17 for each opening shape and replacing the plate 16, it is possible to adjust the opening width of the slit 13. In other words, the plate 16 functions as an adjustment means. Note that by adjusting the opening width of the slit 13, it is possible to adjust the amount of feathering, which is the amount of resin film remaining after cutting. This improves the accuracy of the feathering evaluation.

[0048] In the above-described embodiment, an example has been described in which the lower lever 10 is the first member and the upper lever 20 is the second member. The first member and the second member are not limited to this form and may be formed, for example, in a plate shape. When the first member and the second member are formed in this manner, the first member and the second member may be arranged to face each other, and the second member may be moved up and down like a press. Even when the metal plate evaluation instrument 100 is configured in this manner, it is possible to obtain the same effects as the above-described embodiment. [Example]

[0049] (Test Example 1: Evaluating Feathering of Laminated Metal Sheets) The feathering property of the laminated metal sheet was evaluated using a metal sheet evaluation tool, a commercially available can opener, a shearing tool, and the like.

[0050] (Metal plate evaluation equipment) As the can opener blade of the metal plate evaluation tool, a commercially available rotary can opener blade was used.

[0051] (Laminated metal plate) A laminated metal sheet was prepared by laminating a resin film onto a metal sheet. The metal sheet was a 0.22 mm thick TFS (Tin Free Steel) sheet with a metal Cr layer of 120 mg / m. 2 Cr oxide layer: 10 mg / m in terms of metallic Cr 2 The resin film was coated on both sides of the metal plate by a film lamination method (film heat fusion method).

[0052] (Feathering evaluation) The feathering property was evaluated when the laminated metal sheet was broken using a metal sheet evaluation tool. Specifically, the amount of remaining film was measured as the amount of feathering using an optical microscope, and the maximum and minimum amounts of feathering were recorded.

[0053] (Creating comparative examples and evaluating feathering) The laminated metal sheet was pierced using a commercially available can opener, and the feathering property was evaluated. The laminated metal sheet was sheared using a commercially available shearing tool, and the feathering property thereof was evaluated to obtain Comparative Example 2. The laminated metal sheet was broken by the method of Patent Document 1, and the feathering property thereof was evaluated to obtain Comparative Example 3.

[0054] Table 1 shows the maximum and minimum feathering amounts for the invention example and comparative examples 1 to 3.

[0055] [Table 1]

[0056] As shown in Table 1, in Comparative Example 1, since there was no can seaming portion, the laminated metal sheet had no rigidity, so the laminated metal sheet bent, no cuts were made, and the amount of feathering could not be measured.

[0057] The shearing tool of Comparative Example 2 was unable to reproduce the shape of the cuts made by a can opener while piercing a laminated metal sheet, and feathering hardly occurred.

[0058] In contrast, the maximum and minimum feathering amounts were obtained in the inventive examples. Therefore, it was confirmed that the inventive examples can evaluate the feathering properties without forming the laminated metal sheet into a can body.

[0059] (Test Example 2: Evaluation of the relationship between slit width and feathering of laminated metal sheets) The feathering properties of the laminated metal sheets were evaluated using a number of metal sheet evaluation tools with different widths of slits in the sample placement area.

[0060] (Metal plate evaluation equipment) The slit widths of the metal plate evaluation device were 2 mm (Invention Example 4), 4 mm (Invention Example 1), 10 mm (Invention Example 2), and 16 mm (Invention Example 3). Invention Examples 1 to 4, a SUS plate having the respective slit widths was used as the bottom of the sample mounting section. The can opener blade had a thickness of 1.6 mm and a width of 11 mm. Other aspects were the same as in Test Example 1, so a description thereof will be omitted. Furthermore, the same laminated metal plate as in Test Example 1 was used, so a description thereof will be omitted.

[0061] (Feathering evaluation) The feathering property when a can body made of laminated metal sheet was opened using a can opener was used as a control, and the feathering property when the laminated metal sheet was broken was evaluated using the metal sheet evaluation devices of Invention Examples 1 to 4. The method for evaluating the feathering property was the same as in Test Example 1, so a description thereof will be omitted.

[0062] (Creating a control and evaluating feathering) The feathering properties of laminated metal sheets were evaluated by opening cans with laminated metal sheets for the can body and can lid using a commercially available rotary can opener. The can bodies were prepared by filling them with tap water at 90°C and then seaming them. The maximum feathering amount for the control was 4 mm, and the minimum was 2 mm.

[0063] Reproducibility was determined by reference to the amount of feathering of the control. If the maximum feathering amount was within 4 mm and the minimum feathering amount was 2 mm or more, it was marked as ◎. If the maximum feathering amount was within 6 mm and the minimum feathering amount was 1 mm or more, it was marked as ○. The maximum feathering amount, minimum feathering amount, and reproducibility results for Invention Examples 1 to 4 are shown in Table 2.

[0064] [Table 2]

[0065] (Feathering evaluation of invention examples 1 to 4) As shown in Table 2, the amount of feathering varies depending on the slit width. Specifically, inventive examples 1 to 3, values ​​close to the amount of feathering of the control were obtained. Therefore, it can be said that inventive examples 1 to 3, the amount of feathering is appropriate and the amount of feathering of the control is well reproduced. Inventive example 4, the amount of feathering was reproduced less than that of the control. It is thought that the amount of feathering was less in inventive example 4 because the slit width was narrower than in inventive examples 1 to 3.

[0066] From the above, by using a metal plate evaluation tool, feathering properties equivalent to that of the control could be obtained, and the feathering properties of the control could be tested with good reproducibility. [Explanation of symbols]

[0067] 100 Metal Plate Evaluation Equipment 10 Lower lever (first part) 11 Sample placement section 13 Slit 20 Upper lever (second part) 21 Can opener blade 30 Lever rotation axis (movement mechanism) 40 Laminated metal sheet

Claims

1. A metal plate evaluation device used to evaluate the feathering property of a laminated metal plate in which a resin film is laminated on a metal plate, a first member having a sample placement portion on which the laminated metal plate is placed; a second member having a can opener blade provided at a position corresponding to the sample placement portion; a moving mechanism that moves the second member closer to the first member, The metal plate evaluation device, wherein the sample mounting portion has a slit into which the can opener blade is inserted when the second member approaches the first member.

2. The second member has an angle adjustment means for adjusting an insertion angle of the can opener blade relative to the slit, The metal plate evaluation tool according to claim 1 , wherein the can opener blade is provided on the second member via the angle adjustment means.

3. The sample placement section is formed in a vessel shape having a wall section, 3. The metal plate evaluation tool according to claim 1, wherein the wall of the sample setting portion has a guide mechanism that guides the can opener blade in a direction of movement.

4. The first member and the second member are formed in a lever shape, the moving mechanism has a rotation shaft provided on one end side of the first member and the second member, The metal plate evaluation instrument according to claim 1 or 2, wherein the first member and the second member are connected to each other so as to be rotatable about the axis of the rotation shaft.

5. The first member and the second member are formed in a lever shape, the moving mechanism has a rotation shaft provided on one end side of the first member and the second member, The metal plate evaluation instrument according to claim 3 , wherein the first member and the second member are connected to each other so as to be rotatable about the axis of the rotation shaft.

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