JP2000334699A - Method of and device for punching testpiece and testpiece testing machine incorporating the method and the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To completely separate a testpiece from a rubber sheet upon punching so that the testpiece can be rapidly, smoothly and surely conveyed to a predetermined position, and to automate cutting operation for a torn testpiece. SOLUTION: In this testpiece punching device, before a testpiece 30 is punched out from a soft elastic sheet such as a rubber sheet, parts of the test piece 30 which can hardly be cut off, such as four corners, and a cutting required part are previously cut by previously cutting cutters 16 to 22. Then, the test piece 30 is completely separated from the rubber sheet through main punching operation, and thereafter, the testpiece 30 is left in the cutter, thereby it is possible to punch out the testpiece from the soft elastic sheet such as a rubber sheet to be conveyed to the predetermined position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

2. Description of the Related Art Conventionally, there has been a need for a test machine for punching a test piece from a soft elastic sheet such as a fixed rubber sheet and automatically performing a hardness measurement, a specific gravity measurement, a tensile test, a tear test, and the like. However, depending on the combination of the cutter blades at the time of punching the test piece, the four corners of the test piece may remain without being punched, and the test piece cannot be completely separated from the sheet. In addition, since the test piece adheres to the cutter at the time of punching with a considerable probability depending on the material, conventionally, when punching the test piece, it is necessary to hold the inside and outside of the cutter and pull out only the cutter from the sheet. there were. Also, the test piece cut out in this way is
It was sucked with a vacuum pad or pierced with a needle and held and transported to a predetermined position.However, depending on the material of the test piece, it could not be held securely, or it could be damaged by the needle and affect the test results. Was. Further, the tearing test piece needs to be cut as required, and conventionally, an independent device such as a dedicated cutting machine is used after punching, which hinders automation.

[0002]

Conventionally, there has been a need for a testing machine which punches a test piece from a soft elastic sheet such as a standard rubber sheet and automatically performs a hardness measurement, a specific gravity measurement, a tensile test, a tear test and the like. The problems that have been solved are that the test piece is completely separated from the rubber sheet etc. at the time of punching, that the test piece is quickly, smoothly and reliably transported to a predetermined position, and that the cutting of the tear test piece is automated. is there.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a method for cutting a test piece from a soft elastic sheet such as a rubber sheet into a difficult-to-separate portion such as the four corners of the test piece or a portion requiring cutting by a pre-cut cutter. The present invention provides a test piece punching method for punching a test piece from a soft elastic sheet such as a rubber sheet.
Before punching out the test piece, the pre-cut cutter can be used to cut in advance into the difficult-to-separate parts such as the four corners of the sheet and the necessary cuts, so that the test piece can be completely removed from the sheet by the next continuous punching. In addition to being able to be separated, it is possible to obtain a pre-cut notched test piece that does not require post-treatment.

Further, the present invention provides a method for punching out a test piece, leaving the test piece in a cutter, holding the test piece by a cutter, transporting the test piece to a predetermined position, and operating the inner knockout in the cutter to remove the test piece from the cutter. And a method for punching out a test piece from a soft elastic sheet such as a rubber sheet. It is not necessary to remove the test piece from the inside of the cutter when punching out the test piece, so if only the outer sheet of the cutter is pressed and the cutter is pulled out, the test piece can be left in the form attached to the cutter, and the cutter can be used as it is. The test piece is held and transported to a predetermined position, where the internal knockout in the cutter can be used to separate the test piece from the cutter. It can be transported and can be separated and placed at a required location.

[0005] The present invention also provides a soft elastic sheet such as a rubber sheet, which is provided with a precut cutter for making a cut in a difficult-to-separate portion such as the four corners of the test piece or a necessary cut portion in advance of punching the test piece. The present invention provides a test piece punching apparatus for punching a test piece from a test piece. According to the above-described apparatus of the present invention, in the previous stage of punching of a test piece, a precut cutter can make a cut in advance in a difficult-to-separate portion such as the four corners of the test piece or a necessary cut portion. The test piece can be completely separated from the sheet, and a precut notched test piece that does not require post-treatment can be obtained.

Further, the present invention provides a rubber sheet having an outer knockout which operates simultaneously with punching and an inner knockout which operates at a predetermined position where a test piece is held and transported in a cutter. The present invention provides a test piece punching apparatus for punching a test piece from a soft elastic sheet. According to the above-described apparatus of the present invention, the outer knockout that operates simultaneously with the punching presses the sheet portion on the outer side of the cutter to pull out the cutter, and the punched test specimen is positively left in the cutter in an attached state. The test piece can be held and transported to a predetermined position by the, and the test piece can be separated from the cutter by activating the inner knockout in the cutter at the predetermined position. , Surely transport to the predetermined position,
In addition, it can be separated and placed on a required location.

Another object of the present invention is to provide a test strip tester provided with the test strip punching method of claim 1 or 2 or the test strip punching device of claim 3 or 4. According to the test piece testing machine according to the present invention,
Punching test specimens from a soft elastic sheet such as a standard rubber sheet, and testing equipment that automatically performs hardness measurement, specific gravity measurement, tensile test, tear test, etc., have been required. To provide a test strip testing machine that satisfies conditions such as being completely separated from the test piece, quickly and smoothly transporting the test piece to a predetermined position, and automating the cutting of the tear test piece. You can do it.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments. 1 and 2 show a precut cutter of a test piece punching device according to the present invention. FIG. 1 is a partially longitudinal schematic front view showing a main part in a longitudinal section, and FIG. 2 is a schematic plan view.
In FIG. 1, reference numeral 1 denotes a pre-cut cutter main body, which is provided on a cutter drive table 2 which is moved downward and upward by a hydraulic or pneumatic drive mechanism so as to punch a test piece from above onto a fixed sheet placed on a sheet laying table. They are attached together. In the case of the embodiment, the precut cutter body 1
As described above, the cutter base 3 is fixed to the cutter drive base 2 by two mounting support shafts 4. On the lower surface of the cutter base 3, cutter mounting bases 5 and 6 are fixedly provided one by one on the left and right by mounting screws 22. On the left side of the cutter mounting base 5 in FIG.
8 and 9 are provided, and the right cutter mount 6 is provided with 4
Surface cutter mounting walls 10, 11, 12, 13 are provided. Cutter mounting wall surface 7, 8, 9, 10, 11, 1
2 and 13 are respectively provided with fixing screws 1 via fixing plates 14.
5, cutters for precutting 16, 17, 18,
19, 20, and 21 are provided.

The individual cutters for these precuts are:
At four corners 31, 32, 33, and 34, which are discontinuities between the straight lines of the test piece 30 shown in FIG. 4, the corresponding cutters 16, 17, 19, and 20 are, for example, approximately 45 pieces.
The cutters 21 and 22 are provided so as to cut off the wide corners at the discontinuous portions 35 and 36 between the lines intersecting at a wide angle. Then the corresponding cutter 1
A notch of, for example, 1 mm that requires 8 is installed so as to cut into the test piece 30.

Below the cutter mounts 5, 6, a knockout plate 24 having an area covering the cutters 16 to 22 and having a substantially rectangular holding surface in the illustrated embodiment is provided. The knockout plate 24 is a bearing hole 25 of the cutter base 3.
The upper end of the guide shaft 26 is provided on the upper surface of the cutter base 3 so as to be adjustable in height by a double nut 27, and the lower end of the lower end of the guide shaft 26 Knockout plate 24 and cutter base 3
An elastic member 28 made of a coil spring or the like biasing an expanded elastic force is provided between the knockout plate 27 and the cutter 16 by the elastic force of the elastic member 28 at all times.
-22.

Further, the knockout plate 24 is provided with individual cutter insertion holes 29 through which the cutters 16 to 22 are inserted, respectively. As shown by a broken line in FIG. ,
The knockout plate 24 comes into contact with the sheet surface of the test piece and rises above the cutters 16 to 22 against the elasticity of the elastic member 28, and each of the cutters 16 to 22 protrudes downward from the cutter insertion groove 29 so that the test piece 30 Four corners 31,3
2, 33, 34, the discontinuous portions 35, 36, and a portion corresponding to the cut portion 37 can be cut. And each subsequent cutter 1
At the time of raising 6 to 22, the knockout plate 24 comes into contact with the test piece sheet and the cutters 16 to 22 can be pulled out smoothly and reliably in a state where the test piece 30 is secured at a predetermined position on the sheet mounting table. It is configured in.

FIG. 3 is a schematic explanatory view of a main punching cutter body 40 for punching out the test piece 30 along the outer peripheral edge 38 after the precut. Reference numeral 41 denotes a cutter mounting board, on which a cutter 42 for punching the outer peripheral edge 38 of the test piece 30 is fixedly provided with a fixing screw 43 or the like.
In the case of the embodiment, the cutter mounting board 41 is provided with an outer peripheral wall substantially matching the shape of the test piece 30 as the mounting wall 44, and the cutter 42 to be mounted is configured as an integral product having the same shape as the test piece 30. In addition, the cutter of the straight section and the cutter of the curved section are appropriately combined and the test piece 30 is used.
It is also possible to configure the same shape as the above. In this case, the cutter 4 in a discontinuous portion or the like of the outer peripheral shape of the test piece 30 is used.
By performing the pre-cut by the above-mentioned pre-cut cutter corresponding to the incomplete cutter punching portion of No. 2, perfect full punching becomes possible, and the illustrated test piece 30
It is possible to easily punch a test piece having such a complicated shape as described above. Therefore, the cutter body 40 for final punching
By looking at the result of the trial beating, the arrangement of the cutter of the pre-cut cutter can be set.

Depending on the conditions such as the thickness, material, and complicated shape of the test piece 30, the precut is not limited to one time, and it is also possible to perform precuts with different positions and shapes of precut cutters in multiple stages. The cutter mounting board 41 is provided on the upper cutter support base 45 so as to be vertically movable without rotating. In the case of the embodiment, the cutter mounting board 41 is provided integrally with a vertical operating shaft 46 which penetrates a bearing hole 47 of a cutter supporting base 45 so as to be vertically movable, and a driving operation unit 48 at the top of the vertical operating shaft 46. An elastic holding member 49 composed of a coil spring or the like for maintaining the cutter mounting board 41 above the test sheet laying table between the cutter support bases 45.
Is provided. Reference numeral 50 denotes a stopper provided on the vertical operating shaft 46 so as to abut against the lower surface of the cutter support base 45, provided so as to hold the cutter mounting plate 41 at a constant height against the tensile elasticity of the elastic holding member 49. It is.

An outer knockout mounting plate 52 is provided on the upper surface of the cutter mounting plate 41 so as to be vertically movable by a guide shaft 51. An outer knockout 55 is fixed to a mounting wall 53 of the outer knockout mounting plate 52 by a fixing screw 54. Are provided integrally. The outer knockout 55 is used to press the outer sheet in advance and to smoothly and reliably pull out the cutter 42 from the outer sheet when the test piece 30 is punched from the test sheet by the cutter 42. Therefore, the outer knockout 55 is always located below the cutter and has a fixed pressing width portion 56 on the outer side along the outer periphery of the cutter 42. When cutting, the cutter descends below the pressing width portion 56 and the test is performed. It is configured to have a substantially similar inner edge 57 larger than the test piece 30 so as to cut a piece sheet. The structure can be formed as an integral product, or can be formed into a substantially similar shape to the test piece 30 by an appropriate combination of a straight portion and a curved portion. In short, the pull-out after the cutter 42 is cut is secured. Therefore, unlike the case of the cutter 42, the shape is not required to be so precise, and even if it has a slit or the like, any shape may be used as long as it has an appropriate shape suitable for drawing.

A top nut 58 is detachably provided at the upper end of the guide shaft 51, and a pressing elastic member 59 made of a coil spring or the like is provided between the top nut 58 and the upper surface of the cutter mounting plate 41. is there. Below the cutter mounting plate 41, an inner knockout 60 is provided inside the cutter 42 so as to be vertically movable. The shape of the inner knockout 60 is configured to have a substantially similar outer edge portion 61 slightly smaller than the test piece 30. In the case of the embodiment, the upper and lower drive shafts 62 are provided on the upper surface of the inner knockout 60 so as to be vertically movable through the upper cutter mounting plate 41, the outer knockout mounting plate 52, and the cutter support base 45, A return elastic member 64 composed of a coil spring or the like is provided between the top drive operation unit 63 and the cutter support base 45. When the vertical drive shaft 62 is pressed down against the return elastic member 64, the inner knockout 60 is The test piece 30 which moves downward below the cutting edge 39 of the cutter 42 and is left inside the cutter 42 can be separated.

In the embodiment of FIG. 3, FIG. 1 and FIG.
4 by the pre-cut cutters 16 to 22 described in FIG.
The corners 31 and 3 of the four corners of the test piece 30 as described in
2, 33, 34, the discontinuous portions 35, 36, and the portion corresponding to the required cutting portion 37 are precut to the sheet, and the vertical operating portion 46 of the cutter 42 for final punching positioned by the cutter support base 45. Drive operation unit 4
8 is pushed downward by a predetermined distance by a driving mechanism such as a hydraulic type, a pneumatic type, or a mechanical type, and the cutter mounting plate 41 and the inner knockout 60 are brought into contact with the elastic holding member 49 and the return elastic member 64. At the same time, the outer knockout mounting plate 52 descends against the elasticity.

At the time of lowering, the outer knockout 55 comes into contact with the outside of the portion corresponding to the test piece 30 of the precut sheet, and the cutter mounting board 41 and the inner knockout 60 continue lowering from the stopped outer knockout mounting board 52 downward. And the outer knockout 55 is the test piece 3 of the sheet.
While the pressing elasticity of the pressing elastic member 59 is applied to the periphery of the corresponding portion, the cutting edge 39 of the cutter 42 bites into the sheet corresponding to the outer peripheral edge 38 of the test piece 30, and the test piece is completely removed from the sheet in combination with the precut effect. Cut out 30 and
The cut test piece 30 is configured to adhere to the inside of the cutting edge 39.

Here, the driving action of the cutter 42 to the drive operation portion 48 is reversed, and the cutter mounting plate 41 and the inner knockout 60 are combined with the elasticity of the elastic holding member 49 and the return elastic member 64 to raise the vertical operating portion 46. The outer knockout 55 gives the pressing elasticity of the pressing elastic member 59 around the portion corresponding to the test piece 30 of the sheet until the cutter mounting plate 41 comes into contact with the mounting plate 52 and rises at the same time. Then, when the cutting edge 39 of the cutter 42 cuts into the sheet, completely cuts the test piece 30 from the sheet, and attaches the cut test piece 30 to the cutting edge 39 to ascend, the cutter 42 presses the outer sheet of the test piece and presses the cutter 42.
It is configured so that the cutting edge 39 can be reliably pulled out.

At the time when the final punching by the cutter body 40 is completed, the test piece 30 adheres to the inside of the cutter 42 as indicated by the broken line in FIG. The test piece 30 is transported to a placement position such as a test position of the test piece 30 positioned away from the laying table.
The inner knockout 60 is pushed down to the cutting edge 39 or less of the cutter 42 by pushing down the top drive operating portion 63 of the vertical drive shaft 62 of the zero by a hydraulic, pneumatic or mechanical drive mechanism. 42
It is configured to be placed at a test position or the like separately from the test position. During this transfer, the outer knockout 55 that covers the outer periphery of the cutter 42 functions as a protection member and a safety member for the cutter 42.

Further, in a configuration in which the test piece 30 is separated from the cutter 42 by the inner knockout 60 and is mounted at a test position or the like, the cutter 42 is driven to descend just above the mounting table to lower the inner knockout 60. The inner knockout 60 and the cutter mount 41 can be returned after the test piece 30 separated and pressed against the mounting table is securely mounted. In this case, the outer knockout 55 is set to the height of the mounting table. It is also possible to use a contact terminal of a sensor for detecting the position and control the lowering position of the cutter 42 and the inner knockout 60. Furthermore, the mounting table is provided so as to be positioned smaller and inner than the test piece 30. The test piece 30 is mounted on the mounting table while the test piece 30 is held in the cutter 42, and the test piece 30 is mounted by the inner knockout 60. While maintaining the state of being pressed against the mounting table, only the cutter 42 is moved upward, the test piece 30 is securely separated from the cutter 42 and securely mounted on the mounting table, and then the inner knockout 60 is moved upward. It is also possible to adopt such a configuration.

[0021]

As described above, according to the test piece punching method according to the present invention, before punching out a test piece from a soft elastic sheet such as a rubber sheet, the test piece is cut into difficult-to-separate parts such as four corners of the test piece and necessary cutting parts. By having a configuration in which a cut is made in advance by a pre-cut cutter, there is an effect that the test piece can be completely separated from the sheet, since there is no remaining punching due to the subsequent main punching. This eliminates the need for conventional post-treatment, and has the effect of easily obtaining a tear-cut test piece.

Further, according to the test piece punching method according to the present invention, after the test piece is punched out, the test piece is left in the cutter, the test piece is held by the cutter, transported to a predetermined position, and the inside of the cutter is removed. By having a configuration to separate the test piece from the cutter by operating the knockout, it is not necessary to remove the test piece from the inside of the cutter when punching the test piece, so the punching work is easy, and the cutter is held by holding only the outer sheet of the cutter. The test piece can be left in the form attached to the cutter by pulling it out.Therefore, the test piece can be held by the cutter and transported to a predetermined position. Can be separated from the test piece, and the test piece can be quickly, smoothly and reliably transported to the specified position immediately after punching. Together can effect may, there is an effect that can be mounted reliably separated at predetermined positions.

Further, according to the test piece punching apparatus of the present invention, the test piece punching device has a configuration in which a pre-cut cutter for making a cut in a difficult-to-separate portion such as the four corners of the test piece or a necessary cut portion in advance of the test piece punching is provided. In the preceding stage of the test piece punching, the precut cutter can cut in advance into the difficult-to-separate parts such as the four corners of the test piece and the necessary cutting part, so that the test piece is completely removed from the sheet by the next successive main punching. With the effect that can be separated,
There is an effect that a test piece for tearing which has been cut in advance and which does not require post-processing can be obtained.

According to the test piece punching apparatus of the present invention, the test piece is provided with an outer knockout which operates simultaneously with the punching, and an inner knockout which operates at a predetermined position where the test piece is held and transported in the cutter. By having a configuration to do, the outer knockout that operates simultaneously with the punching, presses the sheet part outside the cutter, pulls out the cutter, positively leaves the punched test piece adhered in the cutter, and tests with the cutter as it is The test piece can be held and transported to a predetermined position, and the test piece can be separated from the cutter by operating the inside knockout in the cutter at the predetermined position, so that the test piece can be quickly, smoothly and reliably immediately after punching. Can be transported to a predetermined position, and can be separated and placed at a required location There is a result.

Further, according to the test strip tester according to the present invention, the test strip punching method according to claim 1 or 2, or the configuration provided with the test strip punching apparatus according to claim 3 or 4, has a fixed form. It has been necessary for a testing machine to automatically punch out a test piece from a soft elastic sheet such as a rubber sheet and perform hardness measurement, specific gravity measurement, tensile test, tear test, etc. To provide a test strip testing machine that satisfies conditions such as separating the test piece quickly, smoothly and reliably to a predetermined position, and automating the cutting of a tear test piece. There is.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal schematic front view showing a main part of an embodiment of the apparatus of the present invention.

FIG. 2 is a partial cross-sectional schematic plan view thereof.

FIG. 3 is a partial vertical cross-sectional schematic front view of another embodiment of the device of the present invention.

FIG. 4 is a schematic explanatory view of one embodiment of a test piece according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Precut cutter 2 Cutter drive stand 3 Cutter base 4 Mounting support shaft 5, 6 Cutter mount 7, 8, 9, 10, 11, 12, 13, 13 Cutter mounting wall surface 14 Fixing plate 15 Fixing screw 16, 17, 18, 19 , 20, 21, 22 Cutter 23 Mounting screw 24 Fixing plate 25 Fixing screw 26 Guide shaft 27 Double nut 28 Elastic member 29 Cutter insertion hole 30 Test piece 31, 32, 33, 34 Four corner 35, 36 Discontinuous portion 37 Cut Cut portion 38 Outer peripheral edge of test piece 30 39 Blade edge of cutter 42 40 Cutter body 41 Cutter mounting board 42 Cutter 43 Fixing screw 44 Mounting wall 45 Cutter support base 46 Vertical operating shaft 47 Bearing hole 48 Drive operating part 49 Elastic holding member 50 Stopper 51 Guide shaft 52 Outer knockout mounting plate 53 Tsukekabe 54 fixing screw 55 outside knockout 56 pressing width portion 57 the inner edge 58 top nut 59 pressing the resilient member 60 inner knockout 61 outer peripheral edge 62 vertical drive shaft 63 the top drive operation portion 64 returning elastic member

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoji Tanaka 5-15-6 Takinogawa, Kita-ku, Tokyo Toyo Seiki Seisakusho F-term (reference) 3C060 AA06 AA20 BA03 BF01 BG01 BG15 BH01

Claims (5)

[Claims] 1. A rubber sheet or the like characterized in that, before punching out a test piece from a soft elastic sheet such as a rubber sheet, a cut is made in advance in a difficult-to-separate portion such as the four corners of the test piece or a required cut portion using a precut cutter. A method for punching a test piece from a soft elastic sheet. 2. The test piece is left in the cutter after the test piece is punched out, the test piece is held by the cutter, transported to a predetermined position, and the test piece is separated from the cutter by operating the inner knockout in the cutter. A method for punching a test piece from a soft elastic sheet such as a rubber sheet. 3. A test piece is cut from a soft elastic sheet such as a rubber sheet, which is provided with a precut cutter for making a cut in a difficult-to-separate portion such as the four corners of the test piece or a necessary cut portion in advance of punching the test piece. Test specimen punching device for punching. 4. A soft elastic material such as a rubber sheet, comprising an outer knockout that operates immediately after punching and an inner knockout that operates at a predetermined position where a test piece is held and transported in a cutter. A test piece punching device for punching test pieces from a sheet. 5. A test strip testing machine comprising the test strip punching method according to claim 1 or 2, or the test strip punching device according to claim 3.