JP4383390B2 - Blade reading device - Google Patents

Description

  The present invention relates to a blade reading device for realistically reproducing the blade of a Japanese sword.

  The swords came from the continent, but in China and South Korea, the swords were used exclusively as weapons and treated as consumables. However, in Japan, many Japanese swords made in a long time ago are preserved as precious arts and crafts and are appreciated by many people. There are also many swordsmen overseas, for example, the British Museum, the Boston Museum of Fine Arts, and the Metropolitan Museum of Art have many Japanese swords.

  It is said that the Japanese sword is respected as an art craft worthy of appreciation because the blade has a unique warp and a beautifully crafted beautiful background. The sword pattern is a pattern that appears on the border between a hardened part that has been baked and a part that has not been baked, and reflects the individuality of the swordsman's era, school, and swordsmanship. It is an important appreciation object.

  When appreciating the sword, it takes a peculiar stance of facing the point light source in front of the front, obliquely illuminating the blade and observing the watermark. When you look at the blade in this state, the glow that floats on the centimeters of the light source reflected in the blade is the blade, and you can see the blade of the entire blade while moving the reflected light source from the blade to the tip To do.

  The shine of this blade is born from a polishing technique unique to Japanese swords that polish the blade with a fine and soft natural whetstone. Each of them is of a uniform flatness and has a beautiful flat surface and specularly reflects the light source. On the other hand, the boundary line portion where crystals with high hardness generated by quenching coexist has fine crystal irregularities. Therefore, only this part diffusely reflects the light source in front, and a unique shining pattern called a blade pattern appears.

  It is not easy to realistically reproduce the swords that can be appreciated with a unique attitude as described above, and some swords have been able to shoot with a camera, but with general swords, the swords themselves Could not be taken. Therefore, for example, as shown in FIG. 12, a technique of reproducing a blade sentence by handwriting is generally widely performed. FIG. 11 shows an example of a general sword photographed by a camera.

  However, as for the method of reproducing the blade, in the case of traditional handwritten transcription, the work itself is not easy because it requires skill, and the reproducibility depends on the skill and sense of the operator. Above all, there is a big difficulty that it lacks reproducibility. Needless to say, in order to spread the appreciation of swords, a reproduction technique with excellent repeatability is required.

  Nowadays, scanner devices capable of reading image data digitally have been put into practical use. However, when trying to read a sword with such a scanner device, the blade is placed directly on a glass document table. There was a problem that had to be done. Also, with such a scanner device, it is not possible to read a blade with good reproducibility even though it can read a general blade image.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a blade reading device that can read a blade of a Japanese sword with high reproducibility.

(1) The blade reading device of the present invention has a light source 2 that irradiates scanning light onto the blade surface 1 and a line CCD 3 that reads reflected light reflected by the blade surface 1 and is moved in the scanning direction. A scanner body 5 having a reading head 4 and a mounting table 7 provided so as to be able to enter and leave the scanner body 5 in order to place a blade 6. A blade reading device for reading,
The reading head 4 is supported by the scanner body 5 so that the reading angle of the blade 6 mounted on the mounting table 7 with respect to the blade surface 1 is adjustable, and the irradiation position with respect to the blade surface 1 is adjusted. The light source 2 is supported by the scanner main body 5 so as to be free, and the light source 2 is provided with a light shielding plate 9 for shielding a part of the irradiation light.

According to such a configuration, the blade 6 is set on the mounting table 7 so that the blade surface 1 is in a flat (horizontal) state, and the mounting table 7 is pushed into the scanner body 5. Next, the reading angle of the reading head 4 with respect to the blade surface 1 and the irradiation position of the light source 2 with respect to the blade surface 1 are adjusted so that the blade surface 1 can be clearly confirmed visually (by the monitor screen). At this time, if the reading position is set in the indirect illumination portion shielded by the light shielding plate 9, the blade sentence formed on the blade surface 1 can be read with good reproducibility.
If the reading position of the reading head 4 is made coincident with the irradiation position of the light source 2 without using the light shielding plate 9, the blade surface 1 is mirror-finished as described above, so that the image is obtained by direct illumination from the light source 2. Becomes completely white and the blade cannot be reproduced. Therefore, in the present invention, the reading position is set in the indirect illumination portion with low lightness shielded by the light shielding plate 9 so that the blade can be clearly reproduced.

(2) The light shielding plate 9 is preferably disposed between the slits 91 and 91. In this way, the light shielding part (indirect illumination part) sandwiched between the irradiation lights emitted from both slits 91, 91 can be projected onto the blade surface 1, and the reading position can be set for the indirect illumination part. Thus, clear image data of the blade can be obtained. In addition, since the indirect illumination portion is sandwiched between the direct illumination portions irradiated through the slits 91, 91, the required amount of light can be ensured regardless of the position of the indirect illumination portion so that the amount of light unevenness is small. Become.

(3) It is preferable that a pair of the light sources 2 is provided. In this way, by arranging the light shielding plate 9 between the two light sources 2, 2, it is possible to project the indirect illumination portion sandwiched between the irradiated portions on the blade surface 1. Accordingly, if a reading position is set in the indirect illumination portion, unevenness in the amount of light caused by a difference in distance between the light source 2 and the reading head 4 due to subtle unevenness of the blade surface 1 and shape distortion of the blade 6 is reduced. The blade text on the blade surface 1 having a desired width can be reproduced without unevenness. Since the indirect illumination part is sandwiched between the two irradiation parts, there is no decrease in brightness in the indirect illumination part, and even if any part of the indirect illumination part is set as the reading position, reproducibility without unevenness is obtained.

(4) The mounting table 7 is preferably configured such that the relative distance from the read head 4 can be adjusted by the jack 31 for focusing. In this way, it is possible to flexibly cope with blades 6 having different thicknesses, and it is always possible to read in focus.

(5) It is preferable that the mounting table 7 is provided with a ridge-side light source 10 for irradiating the ridge side of the blade 6. In this way, the position of the blade 6 can be clearly reproduced, so that the position of the blade can be clearly confirmed.

  The blade reading device of the present invention is provided with a mounting table for mounting the blade so that it can freely enter and leave the scanner body, can adjust the reading angle and irradiation position with respect to the blade surface of the blade, and the light source is irradiated Since there is a light shielding plate that blocks part of the light, place the blade on the mounting table so that the blade surface is flat (horizontal), and adjust the reading angle and irradiation position with respect to the blade surface respectively. If the reading position is set at the indirect illumination portion on the blade surface shielded by the light shielding plate, the blade sentence formed on the blade surface can be read with good reproducibility.

Hereinafter, the blade reading device according to the best mode of the present invention will be described in detail with reference to the drawings.
1 and 2 are perspective views of the blade reading device, FIG. 3 is a perspective view of the reading head, FIG. 4 is an explanatory view of the main part of the reading head, and FIG. 5 is a perspective view of the illumination device. As shown in these drawings, this blade reading device includes a two-lamp type light source 2 and 2 that can adjust the irradiation position, and a reading head (multi-angle scanner) 4 that can adjust the reading angle. In order to place the scanner body 5 and the blade 6 on the scanner body 5, the scanner body 5 is provided. The stage 7 is provided so as to be able to enter and leave the scanner body 5. As shown in FIG. As shown in FIG. 2, the blade 6 is set in the pulled-out state, and the stage 7 is pushed into the scanner body 5 to read the blade text (see FIG. 10) formed on the blade surface 1 (see FIG. 6). used. An opening 7a for internal operation is formed on the side of the scanner body 5.

  The reading head 4 (see FIG. 3) includes light sources 2 and 2 for irradiating the blade surface 1 with scanning light, an optical head 11 for receiving reflected light reflected by the subject, and reflected light received by the optical head 11. A line CCD 3 for outputting digital image data, an inverter board 12 and the like are provided. A pair of adjustment knobs 13, 13 for changing the posture of the read head 4 are provided on the back surface of the read head 4, and a fixed knob 17 that fits in arcuate guide grooves 15 formed on both sides of the support frame 14. By fastening, the posture of the read head 4 can be fixed.

  The read head 4 is supported at one end side in a direction orthogonal to the moving direction thereof by the support frame 14 and the other end side via a height adjusting member (not shown) operated by the adjusting knobs 13 and 13. It is supported by. The height adjusting member includes, for example, a bolt member and a nut member that are screwed together, and the bolt member and the tip end portion of the nut member are pivotally attached to the support frame 14 and the read head 4, respectively. ) Is attached with an adjustment knob 13. With such a configuration, the inclination angle (reading angle) of the reading optical system with respect to the stage 7 can be adjusted, for example, in the range of 25 ° to 35 ° (only for inclination). As shown in FIG. 4, the read head 4 is supported such that the rotation center point P set at the lower end of the L-shaped member 32 fixed to the support frame 14 is the reading position.

  The read head 4 is integrated with the two-lamp type light sources 2 and 2 and straddles a pair of guide rails 19 and 19 which are fixedly arranged in parallel with a predetermined distance from the stage 7. Move back and forth. On one of the guide rails 19, a roller (not shown) that is rotatably supported on one side of the support frame 19 is rotatably mounted, and on the other guide rail 19, the other of the support frame 14 is mounted. A guide block 21 fixed to the side part is slidably fitted freely.

  As shown in FIG. 5, both slits 91 and 91 and a light shielding plate (central light shielding plate) 9 disposed therebetween are provided on the front surfaces of the light sources 2 and 2. Both slits 91 and 91 are provided with lateral light shielding plates 92 and 92 whose positions can be adjusted, so that the widths of both slits 91 and 91 can be adjusted. The light shielding plate 9 is formed so as to be left between both slits 91 and 91 formed by cutting out the front surface of a casing 93 made of a sheet metal material. 2 is fixed to a base plate 95 covering the back side of the two. The horizontal light shielding plates 92 and 92 are made of a sheet metal material bent into an L shape, and are fixed to the base plate 95 by bolt members 96 and 96 that are inserted into the long holes 92a and 92a formed on the upper surface thereof.

  With such a configuration, as will be described later, an indirect illumination part (light-shielding part) sandwiched between light emitted from the light sources 2 and 2 emitted from both slits 91 and 91 can be projected onto the blade surface 1. By setting the reading position of the reading head 4 at the indirect illumination portion, clear image data of the blade can be obtained. In addition, since the indirect illumination portion is sandwiched between the direct illumination portions irradiated through the slits 91 and 91, a required light amount can be ensured regardless of the position where the reading position is set in the indirect illumination portion (decrease in light amount). There is less unevenness in the amount of light.

  The support structure of the light sources 2 and 2 will be described (see FIGS. 3 and 4). Support members 25 and 26 for supporting the light sources 2 and 2 are attached to both sides of the support frame 14, and one of the support members 25 is provided. The base portion of the support member 14 is fixed to the support frame 14 by bolts, and a fixing knob 27 that is screwed into a screw hole of the other support member 26 is loosely fitted in a long hole 25a formed at the tip thereof, and the other support member A fixed knob 29 that is screwed into a screw hole of a support member 28 that supports both sides of the light sources 2 and 2 is loosely fitted into a long hole 26a formed in the hole 26 so as to be fastened. Reference numeral 30 denotes a fixing knob for detachably fixing the light sources 2 and 2.

  FIG. 6 is a cross-sectional view of a state in which the blade 6 is placed on the stage 7. As shown in the figure, a ridge-side light source (fluorescent lamp) 10 for irradiating the ridge side of the blade 6 is provided. Further, a flexible material such as felt is stretched on the upper surface of the stage 7. Then, in order to set the blade surface 1 in a horizontal state, a wedge-shaped elastic member (for example, one obtained by cutting an eraser diagonally) 41 is prepared, and this is placed under the blade surface 1 as shown in the figure. Place and adjust the level. Since each blade 6 has its own distortion (deformation), it is necessary to individually adjust the horizontal adjustment state of the blade surface 1, and a pair of elastic members 41 as described above are arranged in front of and behind the blade 6. If the position is adjusted, the blade surface 1 can be set in a horizontal state.

  The ridge-side light source 10 is provided inside the casing 71 of the stage 7, and a transparent acrylic plate 73 is horizontally disposed in a long hole 72 (see FIG. 7) formed on the upper surface of the casing 71 along the arrangement position of the blade 6. A milky white acrylic plate 74 is vertically erected between the ridge-side light source 10 and the transparent acrylic plate 73. With such a configuration, part of the irradiation light from the ridge side light source 10 that has passed through the milky white acrylic plate 74 passes through the transparent acrylic plate 73 and irradiates the ridge side of the blade 6 from below. Moreover, the shielding member 75 is arrange | positioned in the position close | similar to the ridge side of the blade 6, and the penetration | invasion of the stray light from the circumference | surroundings is prevented. Since the ridge side light source 10 can clearly reproduce the position of the blade 6 ridge, the position of the blade can be clearly confirmed. Further, the blade 6 can be positioned by the shielding member 75 using the warp of the blade 6. That is, in the cross-sectional view shown in FIG. 6, the ridge is separated from the shielding member 75 in the substantially central portion of the blade 6 and the ridge side of the blade 6 is irradiated by the ridge side light source 10, but as shown in FIG. Positioning is made by bringing the ridge side of the blade 6 into contact with both ends of the shielding member 75.

  FIG. 7 shows the stage 7. The stage 7 has overhang portions 76 and 76 at both ends, and handles 77 and 77 are attached to both ends of the overhang portions 76 and 76. The stage 7 can be vertically adjusted by two pairs of jacks 31 disposed on the substrate 78. More specifically, a cradle 80 is provided under the stage 7, and two pairs of jacks 31 are disposed between the cradle 80 and the substrate 78, and the substrate 78 is a pair of guide members 81, 81. (See FIGS. 1 and 2), the stage 7 together with the cradle 80 and the substrate 78 can enter and exit the scanner body 5. Further, the jack 31 is constituted by, for example, a manual screw mechanism, and the stage 7 can be adjusted in height up and down by rotating the operation member, whereby the thickness of the blade 6 is different. In addition, the height of the blade surface 1 with respect to the read head 4 can be adjusted appropriately to focus accurately.

  Next, how to read the blade will be described. In the case of the single-lamp type light source 2 (see FIGS. 8A and 8B), first, as shown in FIG. 8A, the blade surface 1 set on the stage 7 coincides with the reference reading surface. And reading the blade clearly by setting the reading position at a position P1 slightly offset from the light source irradiation area irradiated from the slit 91 (indirect illumination portion projected by the portion shielded by the light shielding plate 9). Can do. On the other hand, as shown in FIG. 8B, when the blade surface 1 set on the stage 7 does not coincide with the reference reading surface (due to distortion of the blade 6), that is, the reading surface is the reference reading. If it does not coincide with the surface, the reading position is position P2 (if the reading angle of the reading head 4 is the same). Since the position P2 is farther from the light source irradiation area than the position P1, the brightness is lowered. Accordingly, in the single light source 2, unevenness in the amount of light tends to occur depending on the height level of the reading surface.

  On the other hand, in the case of the two-lamp light sources 2 and 2 (see FIGS. 9A to 9C), first, as shown in FIG. 9A, the blade surface 1 set on the stage 7 is used. Is coincident with the reference reading surface, the reading position is set at the position P1 in the indirect illumination area AL (the part shielded by the light shielding plate 9) between the light source irradiation areas DL1 and DL2 irradiated from the slits 91 and 91. By doing so, the blade can be read clearly. Next, as shown in FIG. 9B, when the reading surface is slightly deviated from the reference reading surface, the reading position is set at the position P2 of the indirect illumination area AL, and FIG. As shown, when the reading surface is considerably deviated from the reference reading surface, it is possible to read the blade sentence clearly in the same manner by setting the reading position at the position P3 of the indirect illumination area AL.

  The above-described reading positions P1, P2, and P3 are all in the indirect illumination area AL and have different positions, but the indirect illumination area AL is sandwiched between the two light source irradiation areas DL1 and DL2. As long as it is within the area AL, there is no decrease in brightness at any position. Therefore, the two-lamp light sources 2 and 2 can perform reading without unevenness in the amount of light even if the height level of the reading surface is slightly different. For this reason, the present embodiment employs two-lamp light sources 2 and 2 to enable the reproduction of a blade with no unevenness in the amount of light. In FIG. 9C, the width of the light shielding plate 9 sandwiched between the slits 91 and 91 is set slightly larger.

  FIG. 10 shows a blade sentence actually read by the blade reading apparatus equipped with such two-lamp type light sources 2 and 2. From this figure, it is possible to confirm that the contours with subtle changes in the blade text are reproduced realistically without any unevenness and overflowing with a sense of reality. In order to confirm the reproducibility more clearly, a general sword photographed with a camera is shown in FIG. When photographed with a camera, the subtle changes in the outline of the blade are not reproduced, and this makes it impossible to appreciate the blade. In addition, it cannot be overemphasized that the point reading apparatus of this Embodiment provided with the outstanding reproducibility as mentioned above has the reliable repeat reproducibility compared with the case by the conventional handwriting. .

  As described above, the blade reading device according to the present embodiment is provided with the stage 7 for placing the blade 6 so as to be able to enter and leave the scanner body 5, and the reading angle and irradiation of the blade 6 with respect to the blade surface 1. Since the position can be adjusted and the light sources 2 and 2 are provided with a light shielding plate 9 for shielding a part of the irradiation light, the blade 6 is placed on the stage 7 so that the blade surface 1 is flat (horizontal). The blade formed on the blade surface 1 is set on the blade surface 1 by adjusting the reading angle and the irradiation position with respect to the blade surface 1 and setting the reading position on the indirect illumination portion on the blade surface shielded by the light shielding plate 9. Sentences can be read with good reproducibility.

  It should be noted that the present invention is not limited to the above-described embodiments, and design changes, improvements, etc. can be appropriately made without departing from the gist of the invention.

It is a perspective view of the state where the mounting base of the blade reading device concerning an embodiment of the invention was pulled out. It is a perspective view of the blade sentence reading apparatus of the state which pushed the mounting base in the scanner main body. It is a perspective view of the read head. It is a side view of the scanner main body. It is a perspective view of the illumination device. It is sectional drawing of the mounting base of the state which set the same blade. It is a perspective view of the mounting base. It is explanatory drawing of the reading method of the blade sentence in the case of the 1 lamp type light source. It is explanatory drawing of how to read the blade sentence in the case of the light source of the 2 lamp type. It is a reproduction diagram of the blade sentence actually read. It is the reproduction figure of the blade image | photographed with the camera. It is a drawing of the conventional handwritten blade.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Blade surface, 2 ... Light source, 3 ... Line CCD, 4 ... Reading head, 5 ... Scanner body, 6 ... Blade, 7 ... Mounting stand, 9 ... Light-shielding plate, 10 ... Light source on the ridge, 31 ... Jack, 91 ... slit

Claims (5)

A read head (2) that has a light source (2) that irradiates scanning light onto the blade surface (1), and a line CCD (3) that reads reflected light reflected by the blade surface (1), and is moved in the scanning direction. 4) a scanner body (5), and a mounting table (7) provided so as to be movable in and out of the scanner body (5) for mounting the blade (6). A blade reading device for reading the blade formed in 1),
The reading head (4) is supported by the scanner body (5) so that the reading angle of the blade (6) mounted on the mounting table (7) with respect to the blade surface (1) is adjustable. The light source (2) is supported by the scanner body (5) so that the irradiation position with respect to the blade surface (1) can be freely adjusted, and a part of the irradiation light is applied to the light source (2). A blade reading device comprising a light shielding plate (9) for shielding light. The blade reading device according to claim 1, wherein the light shielding plate (9) is disposed between the slits (91) (91). The blade reading device according to claim 1 or 2, wherein a pair of the light sources (2) are provided. 4. The mounting table (7) according to any one of claims 1 to 3, wherein a relative distance from the reading head (4) is adjustable by a focusing jack (31). Blade reading device. The blade reading according to any one of claims 1 to 4, wherein the table (7) is provided with a ridge side light source (10) for irradiating the ridge side of the blade (6). apparatus.