JP2010005881A - Flexible die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible die capable of forming Braille emboss having clear and high processing accuracy in a large amount in a short time. <P>SOLUTION: The flexible die is used for an embossing apparatus for embossing for Braille wherein a pair of flexible bases 2a, 2b are respectively wound on a pair of cylindrical rollers disposed in opposite and a processing target sheet is passed through the pair of these rollers. The pair of flexible bases 2a, 2b are composed of a female side flexible base 2a and a male side flexible base 2b which are male-female fitted to each other, a male side projection part 3b corresponding to the Braille for incusing the processing target sheet is formed on the male side flexible base 2b, and a female side projection part 3a having a recessed part 30 fitted to the male side projection part 3b is formed on the female side flexible base 2a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a flexible die (sheet-like blade plate) used for embossing a sheet material (sheet to be processed) such as a paper sheet or a plastic sheet (film), and more specifically, embossing for braille on the sheet material. It is related with the flexible die used in order to do.

  When forming an emboss for imprinting Braille on a workpiece (hereinafter referred to as “Braille emboss”), it is difficult to form the emboss reliably and clearly because the Braille is small. Therefore, for example, Patent Document 1 has a concave shape and a convex shape for emboss formation on a base paper, and the concave shape and the convex shape are attached to the face plate, respectively, and either one of the face plates supports the concave shape or the convex shape. An embossing device with a body attached has been proposed.

  However, in the technique described in Patent Document 1 described above, the Braille embossing is formed by arranging the Braille forming plates attached to the flat plate to face each other and fitting the unevenness of the plate surface through the processing target sheet. There is a problem that braille embossing cannot be formed in a large amount in a short time.

Therefore, in order to form a large number of braille embossments in a short time, a braille marking projection is formed on the metal roller, and an elastic roller around which the metal roller and an elastic member are wound is disposed opposite to the sheet to be processed. And the braille embossing apparatus which forms braille embossing by rotating these rollers rotationally is proposed (for example, refer patent document 2).
JP 2004-268464 A JP 2006-235264 A

  However, in the technique described in Patent Document 2 described above, braille embossing is formed by interposing a sheet to be processed between a metal roller on which a braille protrusion is formed and an elastic roller, and the braille protrusion is provided with an elastic roller. Since the elastic deformation caused by pressing is used, clear Braille embossing cannot be formed if the pressing force by the Braille protrusions is weak. Moreover, when the pressing force by the braille protrusions is too strong, there arises a problem that the processing target sheet is torn.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a flexible die for braille embossing capable of forming a large amount of braille embossing with high clarity and high processing accuracy in a short time. To do.

  In the present invention, a pair of flexible bases each having an embossing projection formed on one surface are wound around a pair of opposed cylindrical rollers, and a sheet to be processed is passed between the pair of rollers. A flexible die used in an embossing apparatus for embossing for braille, wherein the pair of flexible bases includes a male-side flexible base and a female-side flexible base that engage with each other, and the male-side flexible base The male side convex part corresponding to the braille stamped on the sheet to be processed is formed, and the female side flexible base is formed with the female side convex part having a concave part that fits into the male side convex part. It is characterized by.

  According to this invention, the female side convex part provided with the male side flexible base provided with the male side convex part corresponding to the braille to be stamped on the sheet to be processed and the concave part fitted to the male side convex part is formed. Since the side flexible base and the side flexible base are fitted to each other, it is possible to form braille embossments that are clear and have high processing accuracy on the processing target sheet interposed between the flexible bases.

  The flexible die of the present invention embosses a braille embossing by winding a pair of flexible bases around a pair of opposed cylindrical rollers and passing a sheet to be processed between the pair of rollers. Since it is used in the apparatus, a large amount of braille embossing can be formed on the sheet to be processed in a short time. Furthermore, it is possible to change the braille to be stamped on the processing target sheet simply by exchanging the flexible base. Therefore, it is economical and easy to handle.

  According to the present invention, in the flexible die configured as described above, the concave portion of the female-side flexible base is formed to fit with an inner peripheral surface of the male-side convex portion of the male-side flexible base with a space therebetween. And

  According to the present invention, the concave portion of the female side flexible base and the convex portion of the male side flexible base are fitted to each other with a predetermined interval corresponding to the material of the sheet to be processed and the paper thickness, for example, so that the processing accuracy is increased. High and clear braille embossing can be formed.

  In the flexible die having the above-described configuration, the back surface of the surface of the flexible base on which the embossing convex portion is formed is at least a portion corresponding to the back side of the region where the embossing convex portion is formed. A concave line is formed.

  In the present invention, the number of grooves formed on the back surface of the flexible base may be one. A plurality of concave stripes may be formed on the back surface of the flexible base at a predetermined pitch along the winding direction of the flexible die around the roller. In addition, when forming a some concave strip, you may form over substantially the whole back surface of a flexible base. Further, it is desirable that the concave stripe is formed so as to extend along a direction intersecting with the roller winding direction, particularly along a direction orthogonal to the roller winding direction.

  According to the present invention, a plurality of a plurality of bases extending along a direction orthogonal to a direction in which the flexible die is wound around the roller (hereinafter also referred to as a roller winding direction) are formed on the back surface of the surface on which the embossing convex portion of the flexible base is formed. Since the concave line (or one concave line) is formed, the bending rigidity of the concave line forming part is weakened, and the formation part of the embossing convex part is easily bent. Therefore, when the flexible die is wound around the roller, the embossing convex portion is easily bent along the outer peripheral surface of the roller. The winding property on the roller is deteriorated, and it is possible to mount the flexible base without causing a phenomenon that a part of the flexible base floats from the outer peripheral surface of the magnet roller.

  The present invention can be applied to a flexible die attached to a roller not equipped with a magnet (permanent magnet) in addition to a flexible die attached to a magnet roller.

  According to the flexible die of the present invention, it is possible to form a large amount of clear and high processing braille embossments in a short time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 (A) and 2 (A) are front views showing an example of the flexible die of the present invention. FIG. 1B and FIG. 2B are longitudinal sectional views of main parts of the flexible die.

  First, the flexible die will be described.

  Conventionally, as a method of punching and half-cutting, a die board such as a plywood is subjected to grooving according to the punching pattern, and a strip-shaped blade (Thomson blade) is inserted into the processed groove. A method is employed in which a die is produced, and this die is mounted on a press machine or the like, and a punching process or a half cut of a plastic sheet or the like is performed.

  Recently, a flexible die having a pressing blade with a pattern corresponding to the shape of the cutting line is produced on one side of a flexible base (ferromagnetic material), and this flexible die is used as a magnet roller of a rotary processing apparatus as shown in FIG. A method of punching or half-cutting a paper sheet, a plastic sheet or the like after being wound around 101 is also employed. In the magnet roller 101, a large number of permanent magnets are embedded and arranged on the outer peripheral surface in order to stably attract the flexible die.

  Also, in a method of embossing the surface of a sheet material such as a paper sheet or a plastic sheet (film), a flexible die having a predetermined pattern of embossing irregularities on one side of a flexible base (ferromagnetic material) is produced. The flexible die is similarly wound around a magnet roller 101 of a rotary processing apparatus and embossed on the surface of a plastic sheet or the like. Examples of the flexible die that performs embossing include a flexible die in which a convex portion for processing with a predetermined pattern is formed on the surface of the flexible base, or a flexible die in which a concave portion for processing with a predetermined pattern is formed on the surface of the flexible base. However, a flexible die having a processing projection formed in a planar pattern is usually used.

  The flexible die as described above is manufactured by machining or etching, and the one manufactured by etching is generally called an etching die.

  In the flexible die 1 of the present embodiment, a pair of flexible bases 2a and 2b having embossing projections 3a and 3b formed on one surface are wound around a pair of cylindrical rollers 101a and 101b arranged to face each other. These are used in an embossing apparatus that performs braille embossing by passing the processing target sheet S between the pair of rollers 101a and 101b.

  The pair of flexible bases 2a and 2b is composed of a female-side flexible base 2a and a male-side flexible base 2b that are fitted to each other.

  The male-side flexible base 2b is formed with a male-side convex portion 3b (embossing convex portion) corresponding to the Braille stamped on the processing target sheet S, and the female-side flexible base 2a is fitted to the male-side convex portion 3b. A female-side convex portion 3a (embossing convex portion) provided with the concave portions 30 to be fitted is formed.

  The flexible base 2 having the above structure is used by being wound around a rotary magnet 101 (101a, 101b) of a rotary processing apparatus as shown in FIGS.

  That is, the female-side flexible base 2a and the male-side flexible base 2b are respectively wound around a pair of cylindrical rollers 101a and 101b arranged to face each other, and the sheet S to be processed passes between the pair of rollers 101a and 101b. The female-side convex portion 3a of the female-side flexible base 2a and the male-side convex portion 3b of the male-side flexible base 2b are engaged with each other with the sheet S interposed therebetween, and the sheet S is pressed to perform embossing. (See FIGS. 5 and 6).

  Here, the clearance c between the female-side convex portion 3a and the male-side convex portion 3b to be fitted with each other, that is, the male side of the male-side flexible base 2b with respect to the inner peripheral surface of the female-side convex portion 3a of the female-side flexible base 2a. The interval between the outer peripheral surfaces of the protrusions 3b (see FIG. 6) is preferably set in the range of 20% to 200% of the thickness of the processing target sheet S.

  The setting range of the clearance c is based on the following experimental results and is appropriately determined in consideration of the material and thickness of the sheet S.

  For example, as a result of an experiment with a sheet S made of kraft paper having a thickness of 0.12 mm, when the clearance c is smaller than 40% of the paper thickness (about 0.05 mm), the sheet S breaks. On the other hand, when the clearance c is larger than 200% of the paper thickness (0.24 mm), clear embossing cannot be performed. Further, as a result of an experiment with a film sheet S having a thickness of 0.1 mm formed of PET (polyethylene terephthalate), when the clearance c is smaller than 20% of the sheet thickness (about 0.02 mm), the sheet On the other hand, when S was broken and the clearance c was larger than 200% of the sheet thickness (0.2 mm), clear embossing could not be performed.

  On the other hand, the height difference (step) h (see FIG. 6) between the upper end edges of the female-side convex portion 3a and the male-side convex portion 3b in a state where the male and female are fitted is determined by the material and thickness of the sheet S and the clearance c described above. It is arbitrarily determined in consideration of the above.

  The sheet S used in the present invention can be a variety of sheets such as a resin sheet such as paper and a plastic sheet and a label having a release paper attached to the back surface.

  Further, at least the female-side convex portion 3a and the male-side convex portion of the other surface of the flexible base 2 (2a, 2b) (the female-side convex portion 3a, the surface opposite to the formation surface of the male-side convex portion 3b (back surface)). A plurality of slit-like concave strips 4... 4 extending along a direction perpendicular to the roller winding direction R are formed along the roller winding direction R in a portion corresponding to the back side of the region where the portion 3 b is formed. You may form by pitch (refer FIG. 7, FIG. 8). In this case, the bending rigidity of the formation part of the groove group becomes weak, and the formation part of the embossing convex part (female side convex part 3a, male side convex part 3b) becomes easy to bend. Therefore, when the flexible die is wound around the roller, the embossing convex portions (female side convex portion 3a, male side convex portion 3b) are more easily bent along the outer peripheral surface of the roller. It is possible to mount the roller without “base floating”.

  In this way, a plurality of slit-shaped concave strips (slit-shaped grooves) 4... 4 extending along the direction orthogonal to the roller winding direction R are formed on the other surface (back surface) of the flexible base 2 (2a, 2b). In this way, the flexible base 2 (2a, 2b) can be wound around the magnet roller 101 (101a, 101b) without "base lift". This will be described below.

  In the flexible die 1 in which the embossing convex portion (particularly, the convex portion of the planar pattern) is formed, the portion where the embossing convex portion is formed has high rigidity and is difficult to bend. Therefore, the flexible base 2 (2a, 2b) When the groove is not formed on the back surface, the embossing convex portion is hardly deformed when wound around the magnet roller 101, and the “base float” occurs between the adjacent processing patterns. .

  On the other hand, even if the bending rigidity of the embossing convex portion forming portion is high, a plurality of concave strips 4 extending along the direction perpendicular to the roller winding direction R on the back surface of the embossing convex portion forming portion. If 4 is formed, when the flexible die 1 is wound around the magnet roller 101, the forming portion of each concave strip 4 is bent and deformed. As a result, the embossing convex portion is curved and deformed along the outer peripheral surface of the magnet roller 101, and the flexible die 1 can be mounted on the magnet roller 101 without "base lift". Become. As a result, accurate embossing can be realized.

  Here, the width and depth of the slit-like recesses 4 formed on the back surface of the flexible base 2 and the pitch of the recesses 4 in the roller winding direction R are determined when the flexible die 1 is wound around the magnet roller 101. In consideration of the thickness of the flexible base 2, the bending rigidity of the formation portion of the embossing convex portion 3, the curvature of the outer peripheral surface of the magnet roller 101, etc. It may be determined.

  It should be noted that the plurality of concave stripes 4... 4 are limited to the form in which the concave stripes 4... 4 are formed only on the back surface of the flexible base 2 corresponding to the back side of the embossing convex portion 3 formation portion. Instead, it may be formed over almost the entire back surface of the flexible base 2. Further, the cross-sectional shape of the recess 4 is not limited to a quadrangle, but may be any other shape such as a semicircle or a triangle.

  Furthermore, in the example shown in FIG. 7 and FIG. 8, a plurality of concave strips 4 are formed on the back surface of the flexible base 2. For example, when the pattern width in the winding direction R of the embossing convex portion is small. May form a single concave groove 4 on the back side of the embossing convex portion.

  Furthermore, the recess 4 is not limited to a plurality of slits extending along a direction orthogonal to the roller winding direction R, and may be formed along a direction intersecting with the roller winding direction R, for example. Good.

  Further, the slit-shaped concave strips 4 ·· 4 are formed only on the flexible base 2a on which the female convex portion 3a is formed, and are not formed on the flexible base 2b on which the male convex portion 3b is formed. Also good. This is because the male-side convex portion 3b is formed in a dot shape, so that there is little need to consider “floating of the base” that occurs when the flexible die is attached to the roller.

-Manufacturing method-
Next, an example of a method for manufacturing the flexible die shown in FIGS. 7 and 8 will be described with reference to FIG.

  The female side flexible base 2a and the male side flexible base 2b differ only in the size of the planar shape pattern on which the convex portions 3a and 3b are formed, and the manufacturing method is the same. Since the manufacturing method is common to the female side flexible base 2a and the male side flexible base 2b, in the following description, the flexible base 2 and the embossing convex part 3 are used for convenience.

  (1) First, a photomask (negative film) 23 having an exposure pattern 23a corresponding to the shape of the embossing convex portions 3 (3a, 3b) shown in FIGS. Further, a photomask (positive film) 24a having an exposure pattern having a shape corresponding to the slit-like recesses 4 · 4 on the back surface of the flexible base 2 (2a, 2b) is made in advance.

  (2) As shown in FIG. 9A, a photoresist is uniformly applied to the surface of the metal plate 10, and further, a photoresist is uniformly applied to the back surface of the metal plate 10, Photoresist films 21 and 22 are formed on the front and back surfaces, respectively.

  (3) As shown in FIG. 9B, a photomask (negative film) 23 is placed and positioned on the photoresist film 21 on the surface of the metal plate 10, and on the photoresist film 22 on the back surface of the metal plate 10. The photomask (positive film) 24 is disposed and positioned on the surface. The photomask 23 on the front side of the metal plate 10 and the photomask 24 on the back side are aligned with each other with the resist mark as a reference, and one end portions of the photomasks 23 and 24 are joined with an adhesive tape T. .

  (4) Exposure and development of the photoresist films 21 and 22 on the front and back surfaces of the metal plate 10 to form a resist pattern 21a and openings 22b, 22b at positions corresponding to the plurality of concave stripes 4, 4 22a is formed (FIG. 9C).

  (5) Etching of the metal plate 10 is started using the resist patterns 21a and 22a on the front and back of the metal plate 10 as a mask, and the etching is stopped once when the progress of the etching reaches an amount corresponding to the depth of the recess 4 (FIG. 9D). By this first etching, a plurality of slit-shaped concave strips 4... 4 extending along the direction perpendicular to the roller winding direction R are formed on the back surface of the flexible base 2 at a constant pitch along the roller winding direction R. It is formed. Thus, since the depth of the groove 4 can be accurately controlled by performing the etching of the groove 4 first, the bending rigidity of the formation portion of the groove 4 can be easily adjusted. .

  (6) As shown in FIG. 9 (E), a masking sheet 25 is adhered to the back surface of the metal plate 10 to protect the slit-shaped concave strips 4... 4 formed by the previous etching against the etching solution. In this state, the etching is started again. Etching is performed when the progress of the second etching reaches a predetermined depth ([depth of embossing projections 3 (3a, 3b)]-[depth of recess 4]]. To stop. By such etching, as shown in FIG. 9 (F), the flexible base 2 (2a, 2b) and the protrusion (projection) having a trapezoidal cross section, that is, the embossing projection 3 (3a, 3b) are formed. The After this etching is completed, the masking sheet 25 is peeled off. Further, the resist patterns 21a and 22a remaining on the upper surface side and the back side of the flexible base 2 are removed.

  In addition, after forming the embossing convex part 3 (3a, 3b) by etching (after the process of FIG. 9 (F) is completed), if necessary, using an NC processing machine or the like for embossing You may add the process (finishing process etc.) of cutting with a cutting tool in the both sides | surfaces etc. of the convex part 3 (3a, 3b).

  In the above example, the plurality of slit-like concave strips 4... 4 on the back surface of the flexible base 2 (2a, 2b) are processed by etching. It may be formed by machining.

  The embossing projection 3 (3a, 3b) thus obtained has a tapered cross section as shown in FIG. 10, and the upper end of the male convex portion 3b and the female part with which this edge fits. The corner of the concave portion 30 of the side convex portion 3a is processed to be round. Thus, by processing the upper end portion of the male convex portion 3b in a round shape, the sheet S is less likely to be broken and a round Braille can be engraved.

It is the front view which shows an example of the flexible die | dye of this invention, and a principal part longitudinal cross-sectional view. It is the front view which shows an example of the flexible die | dye of this invention, and a principal part longitudinal cross-sectional view. It is sectional drawing which shows the flexible die | dye of this invention. It is a perspective view which shows the outline of the state which wound the flexible die of this invention around the roller. It is a schematic sectional drawing which shows the outline of the state which wound the flexible die of this invention around the roller. It is sectional drawing which shows the flexible die | dye of this invention. It is sectional drawing which shows the flexible die | dye of this invention. It is a reverse view of the flexible die | dye of FIG. It is a figure which shows typically an example of the manufacturing method of the flexible die of this invention. It is sectional drawing which shows the flexible die | dye of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flexible die 2, 2a, 2b Flexible base 3 Embossing convex part 3a Female side convex part 3b Male side convex part 30 Recessed part 4 Groove 101, 101a, 101b Magnet roller R Roller winding direction S Work sheet

Claims (3)

A pair of flexible bases having embossing projections formed on one surface are respectively wound around a pair of opposed cylindrical rollers, and a sheet to be processed is passed between the pair of rollers to emboss for braille. A flexible die used in an embossing device for performing
The pair of flexible bases is composed of a male side flexible base and a female side flexible base that are fitted to each other.
The male side flexible base is formed with a male side convex part corresponding to Braille to be engraved on the sheet to be processed, and the female side flexible base has a female side convex part having a concave part that fits into the male side convex part. A flexible die that is formed. The flexible die according to claim 1,
The concave part of the said female side flexible base is formed so that it may fit with the internal peripheral surface of the male side convex part of a male side flexible base at intervals. The flexible die according to claim 1 or 2,
The back surface of the surface of the flexible base on which the embossing projections are formed is characterized in that a groove is formed at least in a portion corresponding to the back side of the region where the embossing projections are formed. Flexible die.

Images