Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H20/00—Advancing webs
  • B65H20/02—Advancing webs by friction roller

Definitions

• the present invention relates to an oversized film reader. More specifically, the present invention relates to a transmissive film reading apparatus having a simplified laser optical system. Background art
• a transmission type medical film reader (hereinafter simply referred to as a reader), as shown in FIG. 18, after being irradiated from a semiconductor laser device a, a focusing lens b
• the laser beam c condensed by the laser is reflected by a polygon mirror d to scan (main scan) the film f surface held in a flat shape.
• an F ⁇ lens g is interposed between the polygon mirror d and the film f to correct the optical path length, and a cylinder lens is placed after the Fe lens g to correct surface tilt. H is interposed.
• the film f on which the main scanning is performed is formed by a pair of cylindrical driving rollers i, i and a pair of cylindrical driven rollers j, j as shown in FIG. f is conveyed downward, for example, while the deflection of f in the main scanning direction is suppressed. That is, sub-scanning of the film ⁇ is performed.
• FIG. 20 there is a type in which the driving is performed by using a combination of a driving roller i and a driven roller j.
• a symbol k indicates a scanning unit equipped with an optical system such as a polygon mirror d.
• the sub-scanning mechanism of the film can be simplified by using the cylindrical apertures i and j, while the optical characteristics of the film can be controlled by the F0 lens g.
• the cost of the reading device is increased due to the high cost of the F F lens g.
• an arc having the film f plane oriented in the main scanning direction is used.
• a reading device having a surface and a film transport mechanism in which a sub-scan is performed by combining a beading roller m and a continuous roller n.
• the deflection of the film f in the main scanning direction is suppressed, but the peripheral velocities of the central part and the peripheral part of the rollers 1 m and n are different.
• Another problem is that sub-scanning cannot be performed smoothly.
• the present invention has been made in view of the problems of the related art, and provides a transmissive film gun pick-up device capable of reading a film with high accuracy without using an F ⁇ lens g. It is intended for this purpose. Disclosure of the invention
• a first embodiment of the present invention relates to a transmission type film reading apparatus, wherein film transport means for transporting the film along an arc surface approximated to a free deflection curve of the film is provided. It is characterized by being provided.
• a first mode of the present invention is a film holding means having an arc surface approximated to a free radius curve of a film; a driving roller disposed below the arc surface; A driven roller disposed above the arc surface in correspondence with the driving port, and a driving member of the driving roller can be brought into contact with a film rear surface; A transmissive film reading apparatus characterized by comprising a film transport means in which a driven member can be brought into contact with the film surface.
• the driving member of the driving roller is a pair of driving wheels mounted on a driving shaft at predetermined intervals
• the driven member of the driven roller is a shaft member. It is preferable that a pair of driven wheels are mounted so as to correspond to the driving wheels.
• the drive wheels and the driven wheels It is preferable that the contact surface with the film is an arc surface.
• the driven roller can be moved up and down.
• a box-shaped body in which a ceiling member and a bottom member are parallel to each other and which has a longitudinal direction in a scanning direction of laser light and is configured by combining flat plate-shaped members, A back surface of the shell-shaped member, which comprises a pair of light detecting means disposed at appropriate positions on a plane parallel to the scanning surface of the light, and on which the film of the box-shaped main body is placed and conveyed; A ceiling member abutting on the ceiling member is formed along the back surface of the shell-shaped member, and a slit along the scanning direction of the laser beam for allowing the laser beam to enter the main body into the ceiling member. It is preferable to have a light concentrating device for a film concentration detector in which a film is formed.
• the slit is coated, for example, with a scattering film that appropriately scatters light
• the inner surface of the box-shaped main body is, for example, a coating that prevents absorption of laser light that has entered the main body. Or has been formed.
• the width aligning means is formed by, for example, opposingly disposing a width aligning member that is movable back and forth in the width direction of the film.
• a second embodiment of the present invention relates to a film transport device s used in a transmission type film reading apparatus, which transports a film by placing the film on an arc surface approximating a free deflection curve of the film. It is characterized by doing.
• the second mode of the present invention is a film holding means having an arc surface approximated to a free bending curve of a film; a driving roller disposed below the arc surface; And a driven roller disposed above the arc surface corresponding to the roller, wherein a driving member of the driving roller can be brought into contact with a film rear surface, and a driven member of the driven roller is It is characterized in that it can be brought into contact with the film surface.
• the driving member of the driving roller is a pair of driving wheels mounted on a driving shaft at a predetermined interval
• the driven member of the driven roller is a shaft member. It is preferable that a pair of driven wheels are mounted so as to correspond to the driving wheels.
• the contact surfaces of the drive wheels and the driven wheels with the finolem are arc-shaped surfaces.
• the driven roller can be moved up and down.
• a film is placed on the upper surface of a shell-like member formed in an arc and conveyed, the conveyed film surface is scanned with a laser beam, and the transmitted light is transmitted.
• a light-collecting device for a film density detector which is used in a film-density detector for condensing light and detecting the intensity of the film, wherein the light-collecting device for a film-density detector is a flat plate.
• a box-shaped main body having a longitudinal direction in the scanning direction of the laser beam and having a longitudinal direction parallel to the ceiling member and the bottom member, and an appropriate position of a plane parallel to the laser light scanning surface of the main body.
• the slit is covered with a scattering film that appropriately scatters light.
• the inner surface of the box-shaped main body is formed with a coating for preventing absorption of laser light that has entered the main body.
• the transmission type film can be read without providing the F ⁇ lens in the scanning unit. Sampling can be performed with high accuracy.
• the finolem follows the circular-arc surface only by placing the film on the circular-arc surface. Therefore, it is not necessary to press the film by the driving roller and the driven roller to make the film conform to the conveying surface, and the configuration of the driving roller and the driven roller is simplified.
• the film conveyed in an arc shape can be brought into a substantially close contact state over the entire width, so that the scanning speed of the laser light can be reduced. It can be constant for the light-collecting device for the film concentration detector, and does not increase the size of the transmission film reading device on which it is mounted.
• FIG. 1 is a perspective view of a main part of a transmission type film reader according to the present invention.
• FIG. 2 is a lateral cross-sectional view of the reading device S.
• FIG. 3 is a left side view showing a part of the reading device in a cross section.
• FIG. 4 is a cross-sectional view of the right end portion of the reading device.
• FIG. 5 is a schematic diagram of a film transport mechanism.
• FIG. 6 is an explanatory diagram showing outer peripheral shapes of a drive wheel and a driven wheel.
• Fig. 7 is an explanatory view of the arrangement method of the drive wheel and the driven wheel.
• Fig. 7 (a) shows the case where the extension of the center line of the drive wheel and the driven wheel passes through the center of curvature of the arc table.
• (B) shows a vertical case.
• FIG. 8 is a schematic diagram of a link mechanism used in the reader.
• FIG. 9 is a perspective view of a light-collecting device for a film density detector used in the reader.
• FIG. 10 is an exploded perspective view of the same.
• FIG. 11 is a perspective view showing a state in which the light collector is separated from an arc table.
• FIG. 12 is an exploded perspective view of the film width aligning mechanism.
• FIG. 13 is an operation explanatory view of the reading device of the present invention, showing an initial state of the reading device.
• FIG. 14 is an explanatory diagram of the operation, showing a state where the film is inserted.
• FIG. 15 is an explanatory diagram of the operation, and shows a state in which the upper guide is lowered.
• FIG. 16 is an explanatory diagram of the operation, and shows a state in which the film tip is pulled to a position S where the film tip deviates from the laser beam.
• FIG. 17 is an explanatory view of the operation, showing a state in which the read film is being discharged.
• FIG. 18 is an explanatory diagram of an optical system in a conventional reading device.
• FIG. 19 is a schematic diagram of a film transport device in the reading device.
• FIG. 20 is a schematic view of another example of the conventional reading device.
• FIG. 21 is a schematic diagram of still another example of the conventional reading device 11.
• FIG. 1 is a perspective view showing a main part of a gun device (hereinafter simply referred to as a reading device S) R for a transmission type medical film according to an embodiment of the present invention, and a front sectional view of the reading device R.
• the reading device R includes a scanning unit U, an arc table 10 having an arc surface 11 which is an arc along the main scanning direction L of the film F, and
• the film transport mechanism 20 for sub-scanning the film F placed on the arc surface 11 and a light concentration device for a film density detector (hereinafter simply referred to as a light concentration device) 30 are main components. It is provided as a component.
• the scanning unit U is the same as the conventional scanning unit, except that the F-lens is not provided.
• the arc table 10 is provided with an arc surface 11 that approximates a free deflection curve of the film F formed when the end of the film F orthogonal to the main scanning direction L is supported.
• the radius of curvature of the arc surface 11 is set to about 300 mm.
• the film transport mechanism 20 includes a first drive section 21 and a second drive section 22 provided with the main scanning surface S interposed therebetween.
• each of the unit 21 and the second driving unit 22 is configured by combining a driving roller 23 and a driven roller 24 having the same configuration.
• the drive port 23 includes a pair of plate-shaped drive wheels 23b, 23b mounted at predetermined intervals on a drive shaft 23a driven by a motor via a power transmission mechanism, for example.
• the driven roller 24 is a pair of plates mounted on a shaft 24a rotatably held by a vertically movable member by a suitable means so as to correspond to the drive wheels 23b, 23b. Driven wheels 24b, 24b. As shown in FIG.
• the outer circumferences 23c and 24c of the drive wheel 23b and the driven wheel 24b are formed in an arc shape. Since the outer circumferences 23c and 24c of the drive wheel 23b and the driven wheel 24b are formed so as to be engaged with each other, the force of the drive wheel 23b and the driven wheel 24b, and the force of the film F when the film F is sandwiched. Unnecessary deformation is prevented.
• the driving roller 23 having such a configuration is connected to an arc table.
• the outer periphery 23c of the drive wheel 23b is disposed so as to be able to contact the rear surface of the film F, and the driven port roller 24 is disposed above the circular arc table 10 so that the outer periphery 24c of the driven wheel 24b is It is arranged so that it can contact the surface of the film F.
• the arc table 10 As shown in FIG. 1, a window 12 is provided for the drive wheel 23b to protrude from the surface of the circular arc surface 11. In this case, as shown in FIG. 7 (a), it is preferable to arrange the extension line of the center line of the driving wheel 23b and the driven wheel 24b so as to pass through the center of curvature 0 of the arcuate table 10.
• the drive wheel 23b and the driven wheel 24b may be arranged vertically as shown in FIG. 7 (b).
• the power transmission mechanism 25 for driving the drive port 23 is provided with a shaft-side transmission member 25a mounted on the ends of the drive shafts 23a, 23a, and a drive for the motor Ml. It comprises a motor-side transmission member 25b attached to the end of the shaft, and a belt 25c bridged between the shaft-side transmission members 25a, 25a and the motor-side transmission member 25b.
• the vertically movable member holding the driven port roller 24 is specifically an upper guide 26 which is raised and lowered by a link mechanism.
• the upper guide 26 includes a first holding portion 26a holding the driven roller 24 of the first driving portion 21 and a driven roller 24 of the second driving portion 22.
• a second holding portion 26b holding the first holding portion 26a and the second holding portion 26b, a link 26d for raising and lowering the guide body 26c, and a rotation.
• the upper guide body 26c is pin-joined to the upper end of the link 26d or an appropriate position of the upper guide body 26c, and the lower end is pin-joined to the outer periphery of the rotating disc 26e.
• the link 26d includes an upper link 26f and a lower link 26g, and the lower end of the up link 26f and the upper end of the down link 26g are rotatably joined ( See Figure 8).
• An elongated hole 26h is formed at the end of the upper link 26f, and a pin 26i implanted in the guide body 26c is slidably engaged with the elongated hole 26h.
• an appropriate position S at the center of the upper link 26 mm is freely and pin-joined.
• the lower end of the downward link 26g is rotatably joined to the pin by the rotating disk 26e as described above. I have.
• the mechanism for raising and lowering the driven roller 124 is not limited to the above, but may be any suitable means.
• the mechanism may be configured to be raised and lowered by a chain drive.
• the light collector 30 includes a main body 40 and a photodetector 50 mounted at an appropriate position on the main body.
• the main body 40 has an upper surface 40a and a curvature corresponding to the curvature of the arc surface 11 so as to be mounted on the back surface 11a of the arc surface 11 along the width direction of the arc table 10.
• the cross section formed in an arc shape is a rectangular box (light collecting box) 40A.
• the box body 40A includes, as shown in FIG.
• a ceiling plate 41 formed into a curved surface corresponding to the curved surface of the arc surface 11 abutting on the back surface 1 la of the arc surface 11, a right side plate 42, A left side plate 43, a front plate 44 having an upper end formed in an arc along the inner surface of the ceiling plate 41, a rear plate 45 having an upper end formed in an arc along the inner surface of the ceiling plate 41, and a ceiling plate It is constructed by assembling 41 and the bottom ⁇ 46 molded into a concentric curved surface.
• the front-back direction is based on the transport direction of the film F (see the arrow in FIG. 11).
• the assembling of these plates 41.42, 43, 44, 45, 46 can be performed, for example, by assembling a ceiling plate 41 outwardly to the upper ends of the right side plate 42 and the left side plate 43 as shown in FIG. 43a is integrally formed in an appropriate size, and mounting plates 41a, 41a formed outward from both ends of the ceiling plate 41 are screwed to the mounting plates 42a, 43a correspondingly.
• assembling plates 42b and 43b for assembling the front end 44 outward are integrally formed in an appropriate size and integrally.
• both ends with the upper end abutting on the inner surface of the ceiling plate 41, and assemble the mounting plates 42c and 43c for attaching the rear plate 45 outward to the rear ends of the right and left side plates 42 and 43. Then, both ends of the rear plate 45 are screwed to the assembly plates 42c and 43c with the upper end abutting on the inner surface of the ceiling plate 41, and are attached to the bottom of the right side plate 42 and the left side plate 43.
• Lock holes 42d, 43d are formed, and lock protrusions 46a, 46a formed corresponding to the lock holes 42d, 43d are locked to the ends of the bottom holes 46 in the lock holes 42d, 43d, Further, an assembling plate 47 is provided on the front and rear portions of the back surface of the bottom plate 46 at appropriate intervals so as to be provided downward from the end surface of the bottom plate 46. This is done by screwing the bottoms of the plate 44 and the rear plate 45.
• the light-collecting box 40A assembled in this manner is assembled on the back surface 1 la of the position of the laser beam irradiation from the scanning unit U on the circular-arc surface 11 of the circular-arc table 10 to collect light.
• the laser beam transmitted through the slit 13 provided at the laser beam irradiation position from the scanning unit U on the arcuate surface 11 passes through the focusing box 40A to the ceiling plate 41 and the slit 13 to the slit 13.
• the signal is converted to a signal and sent to a concentration detector (not shown).
• the density detector detects the density of the laser beam transmitted through the film F in accordance with the signal input from the photodetector 50 in the same manner as in the related art.
• the assembly of the light-collecting box 40A to the arc table 10 is performed, for example, by locking the screws that attach the ceiling plate 41 to the side plates 42 and 43 to the arc table 10 (see FIG. 11).
• the laser beam transmitted through the slit 41b formed on the ceiling plate 41 is scattered as appropriate to enter the light collection box 40A as evenly as possible.
• scattering Covered by membrane 49 is formed as the scattering film 49.
• the scattering film 49 for example, a material obtained by removing an adhesive from a Scottish tape (trade name, manufactured by Sumitomo 3M) is used.
• a coating is applied inside the light-collecting box 40A.
• This coating is carried out, for example, by applying a mixture of a water-based acrylic coating and a sulfuric acid barrier at a volume ratio of 1 to 10 and dissolving it in purified water to form a cream-like coating. It is done by and. In this coating, sanding is performed appropriately so as not to generate extra unevenness on the surface.
• This coating is specifically performed as follows.
• a coating agent For example, a mixture of an aqueous acrylic paint and a sulfuric acid barium at a volume ratio of 1 to 10 is dissolved in purified water to form a hobby cream.
• a white for floor (trade name) manufactured by Nippon Paint Co., Ltd. is used.
• the obtained coating agent is thinly applied to the inner surfaces of the ceiling plate 41, the left and right side plates 42, 43, the front plate 44, the rear plate 45, and the bottom plate 46. In this way, the so-called underlying treatment of each inner surface 41, 42, 43, 44, 45, 46 is performed.
• the film thickness is lmn! ⁇ 2mm.
• finish coating This finish is also applied to the unattached ceiling panel 41 and rear panel 45.
• the thickness of the coating is in the range of 3 mm to 4 mm.
• FIG. 11 and FIG. 12 show a width aligning mechanism 60 for adjusting the position in the width direction of the finolem F used in this embodiment.
• the width alignment mechanism 60 includes a width alignment member 61, a driving mechanism 62 that drives the width alignment member 61, and a mounting member 63 that mounts the width alignment member 61 on the drive mechanism 62.
• a pair of the width aligning mechanism 60 and the opposed arrangement are arranged on the arc table 11 at predetermined intervals (see FIG. 11). Then, the width of the film F is adjusted by appropriately moving the arranged width aligning member 61 or the guide groove 14 provided on the circular arc surface 11.
• the drive mechanism 62 includes a flexible rack 64 made of synthetic resin and a motor (not shown) having a pinion for driving the rack 64. You.
• the rack 64 is slidably mounted on a guide 15 provided at an appropriate position on the back surface 11a of the arc surface 11.
• reference numeral 65 denotes a bolt for rotatably fixing the width aligning member 61
• reference numeral 66 denotes a nut screwed to the bolt
• reference numeral 67 denotes a mounting member 63.
• a bolt fixed to the bolt 64 and a space nut 68 screwed to the bolt 64 are shown.
• a predetermined range of the film F is similarly scanned.
• the use of the F lens in the optical system can be abolished, despite the simplification of the film transport mechanism. Therefore, the cost of the reading device R including the scanning unit U can be reduced. Further, according to the present embodiment, since the light collecting device 30 is mounted on the back surface 11a along the width direction of the arc surface 11 of the arc table 10, the width of the light collecting device 30 can be minimized. Can, CT JP / 031 7
• the light can be condensed on the light condensing device 30 at a constant scanning speed of the laser beam over the entire irradiation range. As a result, it is possible to improve the accuracy of Macau detection while preventing the use of the reader R from being unnecessarily large. Furthermore, since the light collecting box 40A constituting the light collecting device 30 is formed by combining flat plates, it is easy to manufacture the light collecting box 30A including the inner surface coating. Industrial applicability
• the film concentration detector for the film port detector is provided.
• the light collection box that constitutes the light collection device for the film concentration detector is made up of a combination of flat plates, it has an excellent effect that it is easy to manufacture including the inner surface coating. Is also obtained.

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Citations (5)

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• 1997
  • 1997-09-10 WO PCT/JP1997/003197 patent/WO1998011009A1/ja not_active Application Discontinuation
  • 1997-09-10 EP EP97940339A patent/EP0873958A4/de not_active Withdrawn

Patent Citations (5)

Non-Patent Citations (1)

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