Cutting tool mechanism for cutting testing base material into test piece and test piece cutting device

Abstract

To make it possible to confirm a cutting position when cutting while improving safety.SOLUTION: A cutting tool mechanism 100 comprises: a base plate 3; a cylindrical cutting tool 1 which is connected to the base plate 3, and cuts a testing base material 6 into a test piece 7; an outer plate 2 which is positioned outside the cutting tool 1, and is so located on a surface on a cutting tool fixed side of the base plate 3 as to be capable of freely reciprocating in a parallel posture. The outer plate 2 has a frame shape inside which the cylindrical cutting tool 1 is located, and has an inner shape thereof along an outer peripheral surface of the cylindrical cutting tool 1. A cutting tool gap 25, in which the outer plate 2 can reciprocate with respect to the cylindrical cutting tool 1, is provided between an inner peripheral surface 23 of the outer plate 2 and an outer peripheral surface 13 of the cylindrical cutting tool 1. The inner peripheral surface 23 of the outer plate 2 has an opposing surface 23a facing the outer peripheral surface 13 of the cylindrical cutting tool 1, and the opposing surface 23a has an inclined plane 24 where the cutting tool gap 25 widens upward.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a blade mechanism for cutting sheet- or plate-shaped test substrates such as plastics and rubber into test pieces for use in tensile tests, impact tests, etc., and to a test piece cutting device equipped with this blade mechanism. [Background technology]

[0002] Materials used for various purposes undergo various tests such as tensile tests and impact tests based on standards and regulations such as ISO and JIS. For example, in order to perform tensile tests and impact tests on rubber used in tires, the rubber is made into a sheet-like test substrate of a specified thickness and cut into dumbbell-shaped test pieces. The test substrate is cut to dimensions that meet the standards for thickness and external dimensions before being used for tensile tests.

[0003] A test piece cutting device that cuts a sheet-like test substrate into a dumbbell shape has been developed (see Patent Documents 1 and 2). However, the outer periphery of the blade, especially the sharp cutting edge, is exposed, and there is a risk of workers accidentally touching it, which poses a safety problem.

[0004] Therefore, in order to eliminate the above-mentioned drawbacks, the present inventor developed a cutting device in which an outer plate is arranged at a position covering the cutting edge and the outer peripheral surface of the cylindrical blade (see Patent Document 3). The outer plate of this cutting device prevents the cutting edge from touching the operator's fingers, improving the safety of the cutting work and handling. In order to properly cut various test substrates used for various purposes, it is necessary to press the test substrate with a thick and strong outer plate and cut the test substrate with the cylindrical blade. It is necessary to cut multiple test pieces from the test substrate without waste, and it is also necessary to avoid causes of test errors such as damage and chipping of the test pieces. However, due to the thickness of the outer plate close to the outer peripheral surface of the cylindrical blade, it is difficult to recognize the cutting edge and confirm the cutting position during cutting, and there is a problem that it is difficult to cut the test pieces at a specified position without waste while avoiding damage and chipping. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2000-210899 A [Patent Document 2] Japanese Patent Application Publication No. 05-057689 [Patent Document 3] JP 2022-066073 A Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention was developed with the further aim of eliminating the above-mentioned drawbacks, and one of the objects of the present invention is to provide a blade mechanism that allows the cutting edge to be checked when cutting while ensuring safety, and a cutting device equipped with this blade mechanism. [Means for solving the problem]

[0007] A blade mechanism according to one embodiment of the present invention is a blade mechanism that cuts a test substrate set on a receiving table using a press mechanism, the blade mechanism comprising: a base plate fixed to the press mechanism; a cylindrical blade connected to the base plate and cutting the test substrate into test pieces; and an outer plate located outside the cylindrical blade and arranged so as to be able to move back and forth in a parallel position to the surface of the base plate on which the blade is fixed. The outer plate is frame-shaped with the cylindrical blade arranged inside, and its inner shape is shaped to follow the outer peripheral surface of the cylindrical blade. A blade gap is provided between the inner peripheral surface of the outer plate and the outer peripheral surface of the cylindrical blade, allowing the outer plate to move back and forth relative to the cylindrical blade. The inner peripheral surface of the outer plate has an opposing surface that faces the outer peripheral surface of the cylindrical blade, and the opposing surface has an inclined surface so that the blade gap widens upward.

[0008] A cutting device according to one embodiment of the present invention includes a blade mechanism, a receiving stand having a cutting surface on which a test substrate to be cut into test pieces is placed and cut, and a press mechanism that presses the blade mechanism against the test substrate placed on the cutting surface. Effect of the Invention

[0009] The above-described blade mechanism and the cutting device equipped with this blade mechanism have the advantage that the blade edge can be checked during cutting while ensuring safety. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a schematic perspective view of a blade mechanism according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded perspective view of the blade mechanism shown in FIG. [Diagram 3] FIG. [Figure 4] 2 is a schematic perspective view showing an example of a test piece to be cut by the blade mechanism of FIG. 1. [Diagram 5] FIG. 13 is a schematic diagram showing another example of the test piece. [Figure 6] FIG. 13 is a schematic diagram showing another example of the test piece. [Figure 7] FIG. 2 is a schematic perspective view showing a blade gap on a short blade side in the blade mechanism of FIG. 1. [Figure 8] FIG. 2 is a schematic perspective view showing a blade gap on a short blade side in the blade mechanism of FIG. 1. [Figure 9] FIG. 2 is a bottom view of the blade mechanism shown in FIG. [Figure 10] 9 is a partial vertical cross-sectional view of the blade mechanism shown in FIG. 1, which corresponds to an end surface taken along line XX in FIG. [Figure 11] FIG. 11 is an enlarged cross-sectional view of a main part of FIG. [Figure 12] 1, and corresponds to the end view taken along line XII-XII in FIG. 9. FIG. [Figure 13] 1, which corresponds to the end view taken along line XIII-XIII in FIG. 9. FIG. [Figure 14] FIG. 2 is a schematic perspective view of an outer plate, and a schematic horizontal sectional perspective view of a cylindrical blade and an inner plate. [Figure 15] FIG. 13 is a schematic perspective view of an outer plate according to another embodiment. [Figure 16] FIG. 13 is a schematic perspective view of an outer plate according to another embodiment. [Figure 17] FIG. 13 is a schematic perspective view of an outer plate according to another embodiment. [Figure 18] FIG. 13 is an enlarged cross-sectional view of a main part showing a state in which a cylindrical blade of a comparative example cuts a test substrate. [Figure 19] FIG. 11 is a schematic configuration diagram of a cutting device according to another embodiment of the present invention. [Figure 20] 1 is a reference photograph of a blade mechanism according to one embodiment of the present invention. [Figure 21] 21 is an enlarged photograph of the main part of FIG. 20. [Figure 22] 13 is a reference photograph of a blade mechanism of a comparative example. [Figure 23] 23 is an enlarged photograph of the main part of FIG. 22. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The present invention will be described in detail below with reference to the drawings. In the following description, terms indicating specific directions or positions (e.g., "upper", "lower", and other terms including these terms) are used as necessary, but the use of these terms is for the purpose of facilitating understanding of the invention with reference to the drawings, and the meanings of these terms do not limit the technical scope of the present invention. In addition, parts with the same reference numerals appearing in multiple drawings indicate the same or equivalent parts or members. Furthermore, the embodiments shown below are specific examples of the technical ideas of the present invention, and do not limit the present invention to the following. Furthermore, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described below are intended to be illustrative and not to limit the scope of the present invention. Furthermore, the contents described in one embodiment and example are applicable to other embodiments and examples. Furthermore, the sizes and positional relationships of the members shown in the drawings may be exaggerated to clarify the explanation. In the drawings, for example, the cutting edge of a cylindrical blade is somewhat exaggerated to make the structure easier to understand. In this specification, the up and down directions are specified in the drawings.

[0012] The embodiments of the present disclosure may be characterized by the following configurations and features. A blade mechanism according to one aspect of the present disclosure is a blade mechanism that cuts a test substrate using a press mechanism, the blade mechanism comprising: a base plate fixed to the press mechanism; a cylindrical blade connected to the base plate and cutting the test substrate into test pieces; and an outer plate located outside the cylindrical blade and arranged so as to be able to move back and forth in a parallel position to the surface of the base plate on which the blade is fixed. The outer plate is frame-shaped with the cylindrical blade arranged inside, and its inner shape is shaped to follow the outer peripheral surface of the cylindrical blade. A blade gap is provided between the inner peripheral surface of the outer plate and the outer peripheral surface of the cylindrical blade, allowing the outer plate to move back and forth relative to the cylindrical blade. The inner peripheral surface of the outer plate has an opposing surface that faces the outer peripheral surface of the cylindrical blade, and the opposing surface has an inclined surface so that the blade gap widens upward.

[0013] The above blade mechanism has a feature that the blade edge can be confirmed during cutting while ensuring safety. The outer plate is a frame shape with a cylindrical blade disposed inside, and its inner shape is shaped to follow the outer peripheral surface of the cylindrical blade. By disposing the outer plate at a position that covers the blade edge of the cylindrical blade, the safety of cutting and handling of the blade mechanism can be improved. In addition, the inner peripheral surface of the outer plate has an opposing surface that faces the outer peripheral surface of the cylindrical blade, and the opposing surface has an inclined surface that widens the blade gap upward and faces the outer peripheral surface of the cylindrical blade, thereby improving the safety of the blade mechanism, making the blade edge directly visible and recognizable during cutting, and reliably confirming the cutting position, and cutting the test substrate at the specified position without waste. Moreover, these effects can be achieved with an extremely simple configuration and structure.

[0014] In another embodiment of the blade mechanism of the present disclosure, the blade gap (S1) on the lower surface side of the outer plate can be narrower than the blade gap (S2) on the upper surface side. The above blade mechanism has the feature that the blade edge can be confirmed during cutting while ensuring safety. By making the blade gap (S1) on the lower surface side of the outer plate relatively narrow, it is possible to improve safety by preventing fingertips from touching the blade edge, and by making the blade gap (S2) on the upper surface side of the outer plate relatively wide, it is possible to easily recognize the blade edge position from above and easily confirm the cutting position.

[0015] In another embodiment of the blade mechanism of the present disclosure, all or part of the opposing surfaces may have an inclined surface with the blade gap widening upward. The above blade mechanism can ensure safety according to the shape, structure, and configuration of the test piece and the blade mechanism, while making it easy to recognize the blade edge from the opposing surface side with the inclined surface when cutting. For example, if the short blade opposing surface and / or the long blade opposing surface have an inclined surface with the blade gap widening upward, it can make it easy to recognize the blade edge from the inclined surface side of the short blade opposing surface or the long blade opposing surface when cutting.

[0016] In the blade mechanism according to another aspect of the present disclosure, the inclined surface can have the same or different inclination angles (θ). The above blade mechanism can ensure safety depending on the shape, structure, and configuration of the test piece and the blade mechanism while making it easy to recognize the blade edge during cutting. For example, the surface facing the short blade can be made a relatively gentle inclination surface to widen the field of view in which the blade edge can be confirmed, and the other surfaces can be made relatively steep inclination surfaces to narrow the blade gap on the lower surface side of the outer plate, thereby improving safety and cutting accuracy.

[0017] In another embodiment of the blade mechanism of the present disclosure, the blade gap (S2) on the upper surface side of the outer plate or the blade gap (S1) on the lower surface side of the outer plate can be the same or different. The above blade mechanism can, for example, provide an area where the blade gap (S2) on the upper surface side of the outer plate is relatively large to widen the field of view in which the blade edge can be confirmed, or provide an area where the blade gap on the lower surface side of the outer plate is relatively narrow to improve safety and cutting accuracy.

[0018] In the blade mechanism according to another aspect of the present disclosure, the inclination angle (θ) of the inclined surface relative to the lower surface (pressing surface) of the outer plate can be set to 20 degrees to 80 degrees. The above blade mechanism can improve safety by preventing fingertips from touching the blade edge as the inclination angle corresponds to the outer circumferential surface of the cylindrical blade, and also makes it easier to check the blade edge.

[0019] In another embodiment of the blade mechanism of the present disclosure, the blade gap (S1) on the lower surface side of the outer plate can be set to 0.1 mm or more and 2 cm or less. The above blade mechanism can prevent the operator's fingertips from touching the blade edge, improving safety, while widening the blade gap (S2) on the upper surface side of the outer plate to make it easier to check the blade edge.

[0020] In the blade mechanism according to another aspect of the present disclosure, at least a part of the outer shape of the base plate can be made smaller than the outer shape of the outer plate. The above blade mechanism has the advantage that, for example, the length (d) of one side of the base plate can be made shorter than the length (D) of the corresponding side of the outer plate, thereby improving safety and widening the field of view in which the blade edge can be recognized, making it easier to check the cutting position.

[0021] In another embodiment of the blade mechanism of the present disclosure, the outer plate can be made transparent. The blade mechanism described above has the advantage that the position of the cylindrical blade and the blade tip, and the position and surface condition of the test substrate can be easily confirmed, improving safety while allowing the blade tip to be confirmed during cutting.

[0022] In the blade mechanism according to another aspect of the present disclosure, the outer plate can be made of plastic. The above blade mechanism has the advantages of being lightweight, inexpensive, easy to process, easy to handle, and safe, while also making it easy to check the blade edge when cutting.

[0023] A blade mechanism according to another aspect of the present disclosure further includes an elastic body that elastically pushes the outer plate in a direction away from the surface of the base plate, and the outer plate has a flat pressing surface on the surface facing the test substrate, and can be arranged in a position (protruding position) where it protrudes from the blade tip of the cylindrical blade with the pressing surface pushed out by the elastic body when not cutting. The above blade mechanism has the feature that the blade tip can be confirmed during cutting while the blade tip is hidden by the outer plate, improving safety, by arranging the pressing surface at the protruding position via the elastic body.

[0024] In another embodiment of the blade mechanism of the present disclosure, a cylindrical blade can cut a test substrate into a test piece having a dumbbell shape, a square shape, a circle shape, or a polygon shape. The above blade mechanism has a feature that the cutting edge can be checked during cutting while ensuring safety according to the shape of the test piece.

[0025] In another embodiment of the blade mechanism of the present disclosure, the cylindrical blade has a pair of long blades for cutting both edges of the long side of the test piece, and a pair of short blades connected to both ends of the long blades for cutting both edges of the short side of the test piece, and the outer plate has a short blade facing surface facing the outer circumferential surface of the short blade and a long blade facing surface facing the outer circumferential surface of the long blade, and the short blade facing surface can have an inclined surface with a blade gap that widens upward. In another embodiment of the blade mechanism of the present disclosure, the long blade facing surface can have an inclined surface with a blade gap that widens upward. In another embodiment of the blade mechanism of the present disclosure, the inclination angle (θ) of the inclined surface of the short blade facing surface with respect to the lower surface (pressing surface) of the outer plate can be smaller than the inclination angle (θ) of the inclined surface of the long blade facing surface. In another embodiment of the blade mechanism of the present disclosure, the blade gap (S2 or S1) on the upper or lower side of the short blade facing surface can be larger than the blade gap on the upper or lower side of the corresponding long blade facing surface.

[0026] A test piece cutting device according to another aspect of the present disclosure can include a blade mechanism, a base on which the test substrate is set, and a press mechanism that presses the blade mechanism against the base on which the test substrate is set. The above-mentioned cutting device has a feature that the blade edge can be checked during cutting while ensuring safety. (Embodiment 1)

[0027] Fig. 1 to Fig. 17, Fig. 20, and Fig. 21 show the blade mechanism 100 according to the first embodiment. Fig. 1 is a schematic perspective view from above, Fig. 2 is an exploded perspective view, Fig. 3 is a schematic perspective view from below, Fig. 4 is a schematic perspective view of a test piece, Figs. 5 and 6 are schematic views of other examples of the test piece, Figs. 7 and 8 are schematic perspective views showing how the blade edge is recognized from the blade gap, Fig. 9 is a bottom view, Figs. 10 to 13 are partial vertical cross-sectional views, Fig. 14 is a schematic perspective view of the outer plate, Figs. 15 to 17 are schematic perspective views of the outer plate according to other examples, and Figs. 20 and 21 are a reference photograph of one example and an enlarged photograph of a main part, respectively.

[0028] The blade mechanism 100 in Figure 1 comprises a base plate 3, a cylindrical blade 1 connected to the base plate 3 and cutting a test substrate 6 into test pieces 7, an outer plate 2 located outside the cylindrical blade 1 and arranged so as to be able to move back and forth in a parallel position to the surface of the base plate 3 on the blade fixing side, and an inner plate 4 located inside the cylindrical blade 1 and arranged so as to be able to move back and forth in a parallel position to the surface of the base plate 3 on the blade fixing side. (Test Substrate 6)

[0029] The test substrate 6 is used for various purposes. The material, thickness, shape, etc. of the test substrate 6 to be cut by the blade mechanism 100 of the present disclosure are not specified, and all test substrates used for tensile tests and the like can be used. The test substrate 6 is, for example, a plastic, a rubber-like elastic body, a metal plate, a containing body or a laminate containing or laminated with different materials, and has a thickness of 1 mm or less, a sheet-like body having a thickness of 1 to 3 mm, or a plate material having a thickness of 3 mm to 5 cm. The test substrate 6 is not limited to a flexible material, and includes, for example, a test substrate 6 made of an inorganic material with little flexibility, such as ceramic, and the blade mechanism 100 can cut it while preventing breakage. (Test piece 7)

[0030] The test substrate 6 is cut into a test piece 7 having a test area 7X and a predetermined size, and various tests such as a tensile test, an impact test, and a burst test are performed based on the standard. Although the present disclosure does not specify the shape and size of the test piece 7, for example, the test piece 7 can be made into a dumbbell shape (FIG. 4). This test piece 7 has a chucking area 7Y for connecting to a testing machine or the like at both ends of the test area 7X having a constant width (W) in the center. This test piece 7 needs to be cut with high dimensional accuracy in the width (W) of the test area 7X. This is because a dimensional error in the width (W) of the test area 7X causes a measurement error in the tensile strength of the test substrate 6. This test piece 7 can be reliably connected to a testing machine at the chucking area 7Y while narrowing the width (W) of the test area 7X. However, the test piece 7 can be made into a shape other than a dumbbell shape, for example, a rectangle, a square (FIG. 5), a polygon, a circle (FIG. 6), an ellipse, a star, a cross, a symmetric or asymmetric shape, an irregular shape, and the like. The test piece 7 can be, for example, a square (rectangle or square) with a constant overall width, with chucking regions 7Y at both ends, and the area between or inside the chucking regions 7Y can be the test region 7X. (Cylindrical blade 1)

[0031] The cylindrical blade 1 cuts the test substrate 6 into test pieces 7 by punching with the blade tip 10 at the lower end edge. The cylindrical blade 1 cuts various shapes of test pieces 7 with the shape of the blade tip 10 as the outer shape of the test piece 7 to be cut. The present disclosure does not specify the shape and thickness of the cylindrical blade 1, but for example, the cylindrical blade 1 shown in Figs. 1 to 3 can cut a dumbbell-shaped test piece 7. The cylindrical blade 1 has a pair of long blades 11 that cut both side edges on the long side of the test piece 7, and a pair of short blades 12 that are connected to both ends of the long blade 11 and cut both end edges on the short side of the test piece 7. The pair of long blades 11 have a test area cutting blade 11X that cuts both sides of the test area 7X, and a chucking area cutting blade 11Y that cuts both sides of the chucking area 7Y. The cylindrical blade 1 is hollow and has an inner hollow portion 17.

[0032] The cylindrical blade 1 can be manufactured by bending and welding a metal plate having a thickness of, for example, 2 mm to 10 mm into a cylindrical shape, or by cutting a metal block into a cylindrical shape by a method such as electric discharge machining. The cylindrical blade 1 is manufactured from a steel material that can be hardened, and preferably carbon steel, which has excellent workability, is suitable. The carbon content of carbon steel is adjusted to an optimum value in consideration of the required hardness and brittleness. Carbon steel can be made hard by increasing the carbon content. However, since a high carbon content makes the steel brittle, a carbon steel with a carbon content of, for example, 0.4% to 1.4%, preferably 0.45% to 0.7%, is used.

[0033] The cylindrical blade 1 is a single-edged blade with an outer blade surface 15 on the outer peripheral surface 13 so that the cut test piece 7 can be smoothly inserted inside. The cutting edge 10 is provided with the outer blade surface 15 by grinding the lower end of the outer peripheral surface 13 with a whetstone or file. The single-edged cylindrical blade 1 has a cylindrical inner peripheral surface 14 that is a nearly vertical surface, and a correction blade surface can be provided by grinding and polishing along the lower end of the inner peripheral surface 14 to improve dimensional accuracy. The tip edge between the outer blade surface 15 and the correction blade surface forms the cutting edge 10, and the cutting edge 10 can be biased toward the outer peripheral surface 13 rather than the inner peripheral surface 14. (Outer plate 2)

[0034] The outer plate 2 is an outer pusher that is disposed outside the cylindrical blade 1 and whose pressing surface 21 presses the test substrate 6. The present disclosure does not specify the shape, thickness, material, etc. of the outer plate 2, but for example, the outer plate 2 shown in FIG. 2 has a frame shape in which the cylindrical blade 1 is disposed inside, and its inner shape is a shape that follows the outer peripheral surface 13 of the cylindrical blade 1, specifically, an inner shape that is larger than the outer shape of the cylindrical blade 1 that cuts the test piece 7. A blade gap 25 is provided between the inner peripheral surface 23 of the outer plate 2 and the outer peripheral surface 13 of the cylindrical blade 1 to allow the outer plate 2 to reciprocate relative to the cylindrical blade 1.

[0035] The outer plate 2 in FIG. 1 and the like has a pressing surface 21 on its lower surface, is located outside the cylindrical blade 1, and reciprocates vertically relative to the cylindrical blade 1. The outer plate 2 presses the surface of the test substrate 6 to be cut with the flat pressing surface 21. The outer plate 2 is pushed out by the elastic body 51 at a position where the cutting edge 10 of the cylindrical blade 1 does not contact the surface of the test substrate 6, and the pressing surface 21 presses the surface of the test substrate 6 ahead of the cutting edge 10, pressing and holding the test substrate 6 so that it does not shift position. Furthermore, the pressing surface 21 holds the test substrate 6 in a substantially flat state, and the test substrate 6 can be cut in a state in which the bulge, bending, and outward deformation of the test substrate 6 due to the cutting edge 10 are suppressed, thereby improving the cutting dimensional accuracy.

[0036] The frame-shaped outer plate 2 in FIG. 9 connects a pair of vertical frames 20m and a pair of horizontal frames 20n at right angles. The vertical frames 20m on both sides have a wider width in the area facing the test area cutting blade 11X of the cylindrical blade 1 than the area facing the chucking area cutting blade 11Y, and the inner peripheral surface 23 of this part is close to the outer peripheral surface 13 of the test area cutting blade 11X. The horizontal frames 20n on both ends have the same width. The frame-shaped outer plate 2 can be formed, for example, by processing a flat plate to provide an opening through which the cylindrical blade 1 can pass, and the pressing surface 21 can be easily made flush without adjusting the horizontal position and posture, so that the test substrate 6 can be stably pressed with a wide pressing area along the outer peripheral surface 13 of the cylindrical blade 1. The outer plate 2 in the figure has a rectangular outer shape and is provided with curved parts 28 by cutting the four corners to improve safety. However, the outer shape of the outer plate 2 can be, for example, square, circular, oval, or any other irregular shape.

[0037] The inner peripheral surface 23 of the outer plate 2 has an opposing surface 23a facing the outer peripheral surface 13 of the cylindrical blade 1, and the opposing surface 23a has an inclined surface 24 that widens the blade gap 25 upward. This inclined surface 24 relatively widens the blade gap 25 (S2) on the upper surface side of the outer plate 2, widening the area in which the blade edge 10 of the cylindrical blade 1 can be recognized from above or from an upward diagonal direction when cutting, and at least a part of the blade edge 10, preferably both ends of the blade edge 10 or the blade edge line, can be recognized, making it easy to confirm the cutting position (Figs. 7, 8, 20, 21). In addition, the inclined surface 24 relatively narrows the blade gap 25 (S1) on the lower surface side of the outer plate 2, preventing the operator's fingertips from entering and accidentally touching the blade edge 10, improving the safety of use and handling. In addition, the inclined surface 24 can narrow the blade gap 25 (S1) on the underside of the outer plate 2 compared to when there is no inclined surface (Fig. 18), and the pressing surface 21 can come close to the cylindrical blade 1 and press the test substrate 6, improving the cutting dimensional accuracy. Furthermore, the inclined surface 24 can also be used as a guide that guides the position and posture of the blade tip 10, or as a stopper that determines the degree to which the blade tip 10 protrudes.

[0038] 18, 22, and 23 show a comparative example of a blade mechanism 900 in which the opposing surface 923 does not have an inclined surface. In the blade mechanism 900 shown in the figures, the blade gap 925 on the upper surface side of the outer plate 902 is narrower than that on the lower surface side, and this, combined with the thickness of the outer plate 902, makes it difficult to check the blade edge and cutting position when cutting. It is true that the cutting position can be checked by widening the blade gap 925 on the upper surface side of the outer plate 902, but this makes the blade gap 925 on the lower surface side of the outer plate 902 even wider, making it impossible to prevent the fingertip from entering the blade gap 925 and touching the blade edge unintentionally, resulting in a decrease in safety. In addition, the outer plate 902 cannot approach the cylindrical blade 901 to press the test substrate 906, resulting in a problem of a decrease in dimensional accuracy of cutting. If the blade gap 925 on the lower surface side of the outer plate 902 is made too narrow in order to avoid this problem, the outer plate 902 will come into contact with the cylindrical blade 901, making it difficult to achieve smooth reciprocating motion.

[0039] The inclination angle (θ) of the inclined surface 24 is preferably 20 degrees to 80 degrees, more preferably 30 degrees to 70 degrees, with respect to the lower surface (pressing surface 21) of the outer plate 2, so that the outer plate 2 can smoothly reciprocate relative to the cylindrical blade 1 and the cutting position can be confirmed during cutting. If the inclination angle (θ) of the inclined surface 24 is too large, the area in which the position of the cutting edge 10 can be confirmed becomes narrow, or it becomes difficult to confirm the position of the cutting edge 10, or the outer plate 2 comes into contact with the cylindrical blade 1, making smooth reciprocating motion difficult. If the inclination angle (θ) of the inclined surface 24 is too small, the strength of the lower tip of the inclined surface 24 may be insufficient or the pressing force may be insufficient.

[0040] The opposing surface 23a in Fig. 14 has a pair of opposing short blade surfaces 23B that face the outer circumferential surface 13 of the short blade 12, and a pair of opposing long blade surfaces 23A that are connected to the opposing short blade surfaces 23B and face the outer circumferential surface 13 of the long blade 11. The outer plate 2 in Fig. 14 has inclined surfaces 24 that widen the blade gap 25 upward on both the pair of opposing short blade surfaces 23B and the pair of opposing long blade surfaces 23A. This outer plate 2 allows the cutting edge 10 of the cylindrical blade 1 to be recognized by looking into the blade gap 25 from either the opposing short blade surfaces 23B or the opposing long blade surfaces 23A, and in particular, as shown in Figs. 7 and 8, both ends (corners) of the cutting edge 10 of the short blade 12 can be easily recognized from the blade gap 25 of the opposing short blade surfaces 23B. (Another embodiment of the outer plate 2)

[0041] The outer plate 2 may have an inclined surface 24 with the blade gap 25 widening upward on all or part of the opposing surface 23a. For example, the outer plate 2 in FIG. 15 has an inclined surface 24 on both sides of a pair of opposing short blade opposing surfaces 23B. This inclined surface 24 allows the cutting edge 10 of the short blade 12 and the cutting position to be confirmed from the blade gap 25. In FIG. 15, the inclined surface 24 is provided on both sides of the opposing short blade opposing surfaces 23B, but the inclined surface 24 can also be provided on one of the short blade opposing surfaces 23B. In FIG. 16, the outer plate 2 has an inclined surface 24 on the long blade opposing surface 23A. This inclined surface 24 allows at least a part of the cutting edge 10 of the long blade 11 and the cutting position to be confirmed from the blade gap 25. In FIG. 16, one of the long blade opposing surfaces 23A has an inclined surface, but the inclined surface 24 can also be provided on both sides of the opposing long blade opposing surfaces 23A. In the outer plate 2 in FIG. 17, the short blade facing surface 23B and the long blade facing surface 23A are provided with an inclined surface 24. This inclined surface 24 allows at least a part of the cutting edge 10 of the short blade 12 or the cutting edge 10 of the long blade 11 and the cutting position to be confirmed from the blade gap 25 of the short blade facing surface 23B or the long blade facing surface 23A where the inclined surface 24 is provided. In FIG. 17, one of the short blade facing surfaces 23B and one of the long blade facing surfaces 23A are provided with an inclined surface 24, but the inclined surface 24 can also be provided on both sides of the pair of opposing short blade facing surfaces 23B or the pair of opposing long blade facing surfaces 23A. Furthermore, the inclined surface 24 can be provided on a part of the opposing surface 23a, a certain range, angle, area, one side (one surface), or a part of a curve (curved surface). For example, the inclined surface 24 can be provided on both ends of the cutting edge 10, an area covering a corner, an arc with a central angle of 45 degrees, a part of the long blade facing surface 23A, near both ends of the long blade 11, etc.

[0042] This disclosure does not specify the inclined surface 24. The inclined surface 24 can have the same or different inclination angles (θ). For example, in the outer plate 2 of FIG. 10 and FIG. 12, the inclination angle (θ1) of the inclined surface 23a of the short blade facing surface 23B is smaller than the inclination angle (θ2) of the inclined surface 23a of the long blade facing surface 23A. This outer plate 2 makes it easier to check the cutting edge 10 and the cutting position from an upward diagonal direction of the short blade facing surface 23B. The inclined surface 24 can be a surface having an unevenness, and can be a non-mirror surface such as a matte cut surface. A non-mirror surface can reduce manufacturing costs without requiring finishing such as mirror polishing and processing. Although FIG. 10 and the like show the inclined surface 24 as a flat surface, the inclined surface 24 can be a curved surface, or a flat surface and a curved surface can be combined. The inclined surface 24 can also be provided with protrusions, steps, uneven shapes, roundness, etc. For example, the outer plate 2 may be provided with marks such as lines, colors, uneven shapes, and steps that facilitate identification and confirmation of the cutting edge 10 and the cutting position on the opposing surface 23a, inclined surface 24, etc. Also, the lower tip of the opposing surface 23a may be rounded to improve strength.

[0043] A blade gap 25 is provided between the inner peripheral surface 23 of the outer plate 2 and the outer peripheral surface 13 of the cylindrical blade 1. The blade gap 25 is an appropriate distance that allows the outer plate 2 to reciprocate relative to the cylindrical blade 1, allows the blade edge 10 and the cutting position to be confirmed through the blade gap 25, and prevents the blade edge 10 from being touched by fingertips, etc. For example, the blade gap (S1) on the lower surface side of the outer plate 2 is preferably 0.1 mm or more and 2 cm or less, and more preferably 0.5 mm or more and 1.5 cm or less.

[0044] The blade gap 25 can be the same or different depending on the shape, structure, and configuration of the test piece 7, the blade mechanism 100, and the cylindrical blade 1. For example, in FIG. 11, the blade gap (S1) on the lower surface side of the outer plate 2 is narrower than the blade gap (S2) on the upper surface side. By narrowing the blade gap (S1) on the lower surface side of the outer plate 2, the blade tip 10 can be prevented from coming into contact with the fingertips, making it safe to use and handle, and the outer plate 2 can press the test substrate 6 close to the blade tip 10 to prevent the test substrate 6 from shifting out of position, and cutting can be performed while suppressing deformation, improving cutting accuracy. By widening the blade gap (S2) on the upper surface side of the outer plate 2, the recognizable area of ​​the blade tip 10 from the upper diagonal direction of the base plate 3 can be widened, making it easier to recognize the blade tip 10 and confirm the cutting position. Also, as shown in FIG. 10 and FIG. 12, the blade gap 25 (S1) between the test area cutting blade 11X can be narrower than the blade gap 25 other than the test area cutting blade 11X. By narrowing the blade gap 25 between the test area cutting blade 11X, it is possible to effectively prevent the test substrate 6 from shifting while improving safety, suppress deformation, and cut the width of the test area 7X with high dimensional accuracy, so the blade gap 25 between the test area cutting blade 11X is, for example, 1 cm or less, and preferably 5 mm or less. The outer plate 2 is provided with an inclined surface 24 on a part other than the test area cutting blade 11X, for example, on the short blade facing surface 23B, thereby realizing both ease of checking the cutting position and dimensional accuracy of cutting the test area 7X.

[0045] In the non-cutting state of the blade mechanism 100, the outer plate 2 is pushed out by the elastic body 51 and is disposed at a protruding position where the pressing surface 21 protrudes from the blade tip 10 of the cylindrical blade 1. Therefore, the blade tip 10 of the cylindrical blade 1 is covered with the outer plate 2 to protect the blade tip 10, and the blade tip 10 can be prevented from contact with the fingertip or the like, allowing safe use and handling. In addition to the blade tip 10 being disposed at a position where it does not protrude from the lower surface of the outer plate 2, the narrow blade gap 25 can further improve the safety of the blade mechanism 100. The protruding length (H) of the protruding portion 26 of the outer plate 2 protruding from the blade tip 10 is preferably, for example, 1 mm or more, and more preferably 2 mm or more. Even if the fingertip is strongly pressed against the pressing surface 21, the blade tip 10 can be prevented from being touched, and the safety of the blade mechanism 100 can be further ensured.

[0046] The outer plate 2 can be, for example, a plastic plate or a metal plate. The plastic outer plate 2 can be, for example, a plate material obtained by molding engineering plastic to a predetermined thickness. As such a plastic plate, nylon, which has high strength and high versatility, such as MC nylon, can be used. However, plastics other than nylon can also be used. The plastic outer plate 2 can be made thick yet lightweight, and can be placed at a protruding position from the cutting edge 10 of the cylindrical blade 1 to protect the cutting edge and fingertips for safe use. The plastic outer plate 2 can be made to have an appropriate thickness and strength to improve safety, and the thickness can be, for example, 5 mm to 3 cm, preferably 6 mm to 2 cm. In addition, the plastic outer plate can be made transparent. A transparent outer plate transmits light, making it easy to check the cutting position and the surface condition of the test substrate 6. (Base plate 3)

[0047] The cylindrical blade 1 and the outer plate 2 are connected to the base plate 3. This disclosure does not specify the shape, thickness, material, configuration, structure, connection manner, etc. of the base plate 3, but for example, the base plate 3 in Figs. 1 and 2 is a flat metal plate, with a connection part 32 fixed to the upper surface, which is detachably connected to the press mechanism 70, and the cylindrical blade 1 and the outer plate 2 connected to the lower surface. The base plate 3 in Fig. 1 has a rectangular outer shape like the outer plate 2, and the four corners are cut to provide curved parts 38, thereby improving safety.

[0048] The outer shape of the base plate 3 can be made smaller than that of the outer plate 2. For example, as shown in Fig. 10, the length (d) of one side of the base plate 3 can be made shorter than the length (D) of the opposing side of the outer plate 2, and when the test substrate 6 is cut, the area blocked by the base plate 3 can be reduced when looking into the blade gap 25 from an upward diagonal direction, widening the area in which the blade edge 10 can be recognized, making it easier to recognize the blade edge 10 and check the cutting position. The base plate 3 can be made into a shape other than a rectangle, for example, a regular shape such as a square, ellipse, or circle, as well as an irregular shape, and can be made into a shape that makes it easy to check the cutting position from the blade gap 25. In addition, a notch, an opening, or the like can be provided to expand the area in which the blade edge 10 can be recognized. (Elastic body 51, connecting rod 52)

[0049] The blade mechanism 100 shown in Figs. 1 to 3 includes an elastic body 51 that elastically pushes out the outer plate 2, and a connecting rod 52 that connects the outer plate 2 to the base plate 3 so that the outer plate 2 can move back and forth in a parallel posture. The shape, configuration, structure, and arrangement of the elastic body 51 and the connecting rod 52 are not specified, but for example, the elastic body 51 is a compression spring of a coil spring 51a, and is disposed between the outer plate 2 and the base plate 3 in a compressed state to elastically push out the outer plate 2. The spring constant of the elastic body 51 can be increased to increase the pressure with which the pressing surface 21 of the outer plate 2 presses the test substrate 6. For example, the pressure with which the surface of the test substrate 6 is pressed flatly when the outer plate 2 presses and cuts the test substrate 6 can be set to an optimal value by adjusting the spring constant of the elastic body 51 and the position at which the stopper 54 compresses the elastic body 51. Since the outer plate 2 is connected to the base plate 3 via an elastic body 51, when the cutting edge 10 of the cylindrical blade 1 cuts the test substrate 6, the test substrate 6 is pressed with a predetermined pressing force via the elastic body 51, so that the test substrate 6 can be cut in a state in which deformation of the test substrate 6 is suppressed.

[0050] The connecting rod 52 stops the pressing surface 21 of the outer plate 2, which is pressed by the elastic body 51, at a protruding position where it protrudes from the cutting edge 10 of the cylindrical blade 1. The connecting rod 52 has a lower end fixed to the outer plate 2 and an upper end inserted into a through hole 53 of the base plate 3 so as to be capable of reciprocating freely. The connecting rod 52 has a stopper 54 at its upper end, which contacts the upper surface of the base plate 3 to determine the protruding position and protruding length of the outer plate 2 protruding from the cutting edge 10. The protruding position of the outer plate 2 is set, for example, at approximately 1 mm or more and 1 cm or less from the cutting edge 10, and preferably 2 mm or more and 8 mm or less.

[0051] The connecting rod 52 has a male threaded portion 52a at its upper end. A nut 54a is screwed into the male threaded portion 52a to serve as a stopper 54. This structure allows the position of the stopper 54 to be adjusted by the screwed position of the nut 54a. The stopper 54 can be structured so that it will not loosen due to impact by using a plurality of nuts 54a as double nuts. The connecting rod 52 has a male threaded portion 52a that is inserted from bottom to top into the insertion hole 53b of the outer plate 2 and also passes through a through hole 53a of the base plate 3, where the nut 54a is screwed into the male threaded portion 52a to connect the outer plate 2 to the base plate 3. The connecting rod 52 has a recess 55 on the underside of the outer plate 2 so that the screw head 52b does not protrude from the underside of the outer plate 2, and the screw head 52b is guided to the recess 55. The connecting rod 52 is disposed in an appropriate position that does not impede confirmation of the cutting position and allows the outer plate 2 to reciprocate as much as possible in a parallel posture, for example, near the four corners of the base plate 3. (Inner plate 4)

[0052] The inner plate 4 is an inner pusher that is disposed inside the cylindrical blade 1 and the pressing surface 41 presses the test substrate 6. The present disclosure does not specify the shape, thickness, material, etc. of the inner plate 4, but for example, the blade mechanism 100 in Figs. 3 and 10 has an inner plate 4 that is disposed inside the cylindrical blade 1 and is arranged to freely reciprocate in a parallel posture on the surface of the blade fixing side of the base plate 3. The outer shape of the inner plate 4 is a shape that follows the inner peripheral surface 14 of the cylindrical blade 1, specifically, an outer shape that is slightly smaller than the inner shape of the cylindrical blade 1. The outer shape of the inner plate 4 in Fig. 3 is a dumbbell shape, and an inner gap 45 is provided between the outer peripheral surface 43 of the inner plate 4 and the inner peripheral surface 14 of the cylindrical blade 1 so that the inner plate 4 can reciprocate relative to the cylindrical blade 1.

[0053] The inner plate 4 has a flat pressing surface 41 on the surface facing the test substrate 6. When the blade mechanism 100 is not cutting, the inner plate 4 is arranged at a protruding position where the pressing surface 41 protrudes from the blade tip 10 of the cylindrical blade 1. The pressing surface 41 of the inner plate 4 can be arranged at the protruding position in a state where it is pushed out into the elastic body. By arranging the inner plate 4 at the protruding position, the blade tip 10 does not protrude from the lower surface (pressing surface 41) of the inner plate 4, and the safety of handling can be improved. The protruding length (h) of the protruding part 46 of the inner plate 4 protruding from the blade tip 10 is preferably, for example, 1 mm or more, and more preferably 2 mm or more. This is because, when the fingertip is unintentionally pressed forcefully against the pressing surface 41, such as by grabbing it, even if the soft skin of the fingertip is embedded in the inner gap 45 or the blade gap 25, contact with the blade tip 10 can be prevented, and safety can be more assured.

[0054] In the blade mechanism 100 shown in Figures 10 and 11, when not cutting, both the pressing surface 21 of the outer plate 2 and the pressing surface 41 of the inner plate 4 are arranged in a protruding position protruding from the cutting edge 10 of the cylindrical blade 1. The outer plate 2 and the inner plate 4 sandwich the cutting edge 10 from both sides, and the respective pressing surfaces 21, 41 are arranged in a protruding position, thereby hiding the cutting edge 10 and preventing an operator from unintentionally touching the cutting edge, thereby improving the safety of handling the blade mechanism 100. When not cutting, the blade mechanism 100 arranges the pressing surface 21 of the outer plate 2 and the pressing surface 41 of the inner plate 4 on the same plane, so that the test substrate 6 can be pressed evenly, improving cutting accuracy.

[0055] In the inner plate 4 of Fig. 11, the distance (S3) of the inner gap 45 is narrower than the distance (S1) of the blade gap 25, and the inner plate 4 is disposed closer to the cutting edge 10 than the outer plate 2. The cylindrical blade 1 is a single-edged blade with an outer blade surface 15, and by disposing the inner plate 4 closer to the inner peripheral surface 14, which is a nearly vertical surface, it is possible to further improve the safety of handling and the cutting accuracy. In addition, the narrow inner gap 45 has the effect of improving the safety of handling while shortening the protruding length (d) of the inner plate 4, and the relatively wide blade gap 25 contributes to the ease of checking the cutting edge 10 and the cutting position.

[0056] As shown in Figures 7 and 8, when cutting, the protrusion 46 protruding from the blade tip 10 can be seen and recognized through the blade gap 25. The protrusion 46 can be a color different from the blade tip 10. When cutting, the protrusion 46 can be more easily recognized through the blade gap 25, making it easier to recognize and check the cutting edge line, the positions of both ends (corners), and the cutting position. The protrusion 46 in the figures is positioned so that the underline (pressing surface 41) is parallel to the blade tip 10, making it easy to check the blade tip 10 and the cutting position. (Embodiment 2)

[0057] The cutting device 200 for a test specimen 7 in Figure 19 includes a receiving table 60 having a cutting surface 61 on which the test substrate 6 is placed and cut, a blade mechanism 100 that cuts the test substrate 6 into test specimens 7, and a press mechanism 70 that presses the blade mechanism 100 against the test substrate 6. (Pedestal 60)

[0058] The receiving stand 60 is made of, for example, metal, and is arranged in a horizontal position with the cutting surface 61 on the upper surface as a smooth plane. However, the receiving stand 60 may be made entirely or on its surface of plastic or rubber. The metal receiving stand 60 has a buffer sheet 62 placed on the cutting surface 61, and can punch out the test piece 7 while preventing damage to the blade tip 10 of the blade mechanism 100. The buffer sheet 62 is, for example, a plastic sheet having a thickness of 1 mm to 5 mm. The receiving stand 60 with the buffer sheet 62 laminated on its upper surface can neatly cut out the entire circumference of the test piece 7 from the test substrate 6 by pressing the blade tip 10 of the blade mechanism 100 against the buffer sheet 62 or inserting it onto the surface of the buffer sheet 62 in a state in which the test substrate 6 is punched out by the blade mechanism 100. However, it is not necessary to place a plastic buffer sheet 62 on the upper surface of the receiving base 60. Instead, a buffer sheet 62 other than plastic that will be cut by the cutting edge 10 but will not damage the cutting edge 10 of the blade mechanism 100, such as a metal softer than the receiving base 60 such as brass or lead, can be laminated thereon. Alternatively, the blade mechanism 100 can be brought close to or into contact with the cutting surface 61 of the receiving base 60 without laminating the buffer sheet 62, and the test substrate 6 can be punched out and cut. (Press Mechanism 70)

[0059] The press mechanism 70 presses down the blade mechanism 100 to cut the test substrate 6 placed on the cutting surface 61 of the receiving table 60 into test pieces 7. The press mechanism 70 includes an upper and lower table 71 to which the blade mechanism 100 is attached and fixed, and a cylinder 72 that moves the upper and lower table 71 up and down. The blade mechanism 100 fixed to the lower surface of the upper and lower table 71 is pressed down to cut the test substrate 6 on the receiving table 60 into test pieces 7. In the press mechanism 70 of FIG. 19, the cylinder 72 is arranged in a vertical position, and the lower end of the extendable rod is connected to the center of the upper and lower table 71. With the cylinder 72 extending and retracting the rod, the press mechanism 70 moves the upper and lower table 41 up and down while maintaining the horizontal position.

[0060] The cutting device 200 described above punches and cuts the test substrate 6 into test pieces 7 in the following steps. (1) The blade mechanism 100 is attached to the press mechanism 70. The vertical stand 71 is placed in the raised position by the cylinder 72, and the connecting portion 32 of the base plate 3 is fixed to the lower surface of the vertical stand 71. (2) Place the test substrate 6 on the receiving stand 60. (3) The blade mechanism 100 is lowered by the press mechanism 70. The final position of the test substrate 6 is adjusted while checking the blade tip 10 and the cutting position from the blade gap 25. Furthermore, the upper and lower tables 71 are lowered by the cylinders 72, and the pressing surface 21 of the outer plate 2 presses the test substrate 6 along the cutting line on the outside of the cutting line, and the pressing surface 41 of the inner plate 4 presses the test substrate 6 on the inside of the cutting line. (4) In this state, when the vertical stand 71 is further lowered, the cutting edge 10 moves vertically downward to cut the test substrate 6. (5) After cutting, the press mechanism 70 raises the blade mechanism 100 to push the cut test piece 7 out of the cylindrical blade 1 and collect the test piece 7. [Industrial Applicability]

[0061] The present invention can be suitably used as a cutting device that cuts test substrates such as rubber and plastic to cut test pieces having a dumbbell shape or the like for use in tensile tests, impact tests, etc., and as a blade mechanism used in this cutting device. [Explanation of symbols]

[0062] 100...Cutting mechanism 200...Cutting device 1…Cylindrical blade 2…Outer plate 3…Base plate 4…Inner plate 6...Test substrate 7...Test piece 7X…Test area 7Y: Chucking area 10…Cutting edge 11...Long blade 11X: Test area cutting blade 11Y: Chucking area cutting blade 12...Short blade 13...Outer surface 14...Inner peripheral surface 15...Outer blade surface 17...Inner hollow part 20m…vertical frame 20n…Horizontal frame 21...Pressing surface 23…Inner peripheral surface 23a…Facing surface 23A…Long blade opposing surface 23B…Short blade opposing surface 24…Slope surface 25…Blade gap 26...Protrusion 28…Bend 32...Connection part 38…Bend 41...Pressing surface 43...Outer surface 45…Internal gap 46...Protrusion 51...Elastic body 51a…coil spring 52…Connecting rod 52a…Male thread 52b…screw head 53a...Through hole 53b...Through hole 54…Stopper 54a…Nut 55…Recess 60…Pedestal 61…Cut surface 62...Cushioning sheet 70...Press mechanism 71…Upper and lower stand 72…Cylinder 901...Cylindrical blade 902…Outer plate 906...Test substrate 923…Opposite surface 925…Blade gap

Claims

1. A blade mechanism for cutting the test substrate with a press mechanism, The blade mechanism includes: A base plate fixed to the press mechanism; a cylindrical blade connected to the base plate and configured to cut the test substrate into test pieces; an outer plate located outside the cylindrical blade and arranged to freely reciprocate in a parallel orientation on a surface of the base plate on which the blade is fixed; Equipped with The outer plate has a frame shape in which the cylindrical blade is disposed inside, and the inner shape of the frame is shaped to fit the outer peripheral surface of the cylindrical blade, a blade gap is provided between an inner peripheral surface of the outer plate and an outer peripheral surface of the cylindrical blade, allowing the outer plate to reciprocate relative to the cylindrical blade; The inner circumferential surface of the outer plate has an opposing surface facing the outer circumferential surface of the cylindrical blade, The opposing surface of the blade mechanism has an inclined surface that widens the blade gap upward.

2. 2. The blade mechanism according to claim 1, A blade mechanism in which the blade gap (S1) on the lower surface side of the outer plate is narrower than the blade gap (S2) on the upper surface side.

3. 2. The blade mechanism according to claim 1, A blade mechanism in which all or a part of the opposing surface has an inclined surface that causes the blade gap to widen upward.

4. 4. A blade mechanism according to claim 3, A blade mechanism in which the inclined surfaces have the same or different inclination angles (θ).

5. 4. A blade mechanism according to claim 3, A blade mechanism in which the blade gap (S2) on the upper surface side of the outer plate or the blade gap (S1) on the lower surface side of the outer plate is the same or different.

6. 2. The blade mechanism according to claim 1, A blade mechanism in which the inclination angle (θ) of the inclined surface is 20 degrees to 80 degrees.

7. 2. The blade mechanism according to claim 1, A blade mechanism, wherein the blade gap (S1) on the underside of the outer plate is 0.1 mm or more and 2 cm or less.

8. 2. The blade mechanism according to claim 1, A blade mechanism in which at least a portion of the outer diameter of the base plate is smaller than the outer diameter of the outer plate.

9. 2. The blade mechanism according to claim 1, a blade mechanism having an inner plate located inside the cylindrical blade and arranged so as to be capable of reciprocating motion in a parallel orientation to the surface of the base plate on which the blade is fixed;

10. 2. The blade mechanism according to claim 1, A knife mechanism wherein the outer plate is transparent.

11. 2. The blade mechanism according to claim 1, The blade mechanism wherein the outer plate is made of plastic.

12. 2. The blade mechanism of claim 1, further comprising: an elastic body that elastically pushes the outer plate in a direction away from the surface of the base plate; The outer plate has a flat pressing surface facing the test substrate, A blade mechanism is disposed at a position protruding from the cutting edge of the cylindrical blade with the pressing surface being pushed out by the elastic body during non-cutting.

13. A blade mechanism according to any one of claims 1 to 12, A blade mechanism in which the cylindrical blade cuts the test substrate into test pieces having a dumbbell shape, a square shape, a circle shape, or a polygon shape.

14. A blade mechanism according to claim 1 ; A receiving table having a cutting surface on which a test substrate to be cut into test pieces is placed and cut; and a press mechanism that presses the blade mechanism against a test substrate placed on the cutting surface.

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