JPH0372334A - Image recording device for microfilm - Google Patents

Abstract

PURPOSE:To securely guide the leader of the film even at a narrow-space image exposure part by installing an optical unit closely to a main roller which supports the reverse surface of the film and providing a member which guides the leader of the film in its conveyance direction to a lens barrel which faces the main roller. CONSTITUTION:The optical unit 200 is arranged closely to the main roller 170 which supports the back surface of the film at the image exposure part and the lens barrel 211 which faces the main roller 170 is provided with the guide member 212 which guides the leader of the film in the conveyance direction. Therefore, the film is conveyed automatically along a travel passage in automatic loading mode and when the film travels around the main roller 170, the leader of the film is guided by the guide member 212 provided to the lens barrel 211 or guide surfaces 212b and 212c formed on the surface of a lens 210. Consequently, the guide means 212 for the film leader can be installed in the narrow space between the main roller 170 and lens barrel 211 and the film is loaded securely and automatically without any trouble.

Description

[Detailed description of the invention] The present invention winds up the microfilm sent out from the film storage section to the film winding section through the film running path, and the microfilm is wound up into the film winding section provided in the middle of the film running path. The present invention relates to an image recording device that records an image on a film using a laser beam emitted from an optical unit in an image exposure section.

In recent years, various devices have been provided that record images one frame at a time on a long microfilm using a laser beam. This type of device generally consists of a raw film cartridge for supplying unexposed raw film, a laser beam optical system, a winding cartridge for sequentially winding recorded film, and an optical system for exposing the raw film. It is comprised of a film transport mechanism that transports the film to a position and further transports it to a winding cartridge, and a control mechanism.

By the way, in this type of image recording apparatus, in order to automatically load the film, it is necessary to install various film guide members in the film travel path. However, the image exposure section needs to satisfy the conditions of allowing the laser beam to pass through and guiding the film, and also because the space between the main roller that supports the back of the film and the laser beam scanning optical unit is narrow. It has been difficult to install a film guide member that has a good guide function. Moreover, if a scanning lens with a short focal length is used for miniaturization, the distance between the main roller and the scanning lens becomes small, resulting in the problem that a film guide member cannot be installed.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image recording apparatus that can reliably guide the leading edge of a film even in an image exposure section with a narrow space during automatic film loading.

Structure and Function of the Invention In order to solve the above-mentioned problems, an image recording device according to the present invention has an optical unit installed close to the main roller that supports the back side of the film in the image exposure section, and facing the main roller. The present invention is characterized in that a guide member is provided on the lens barrel to guide the leading edge of the film in the film transport direction. Alternatively, instead of this guide member, the surface of the lens facing the main roller is configured as a guide surface for the leading edge of the film.

In the above configuration, the film is automatically transported along the travel path during autoloading, and when going around the main roller, the film is transported by a guide member provided on the lens barrel of the optical unit or a guide formed on the surface of the lens. The leading edge of the film is guided by the surface. This guide member and guide surface are provided on the lens barrel or the lens itself, and can be installed without any problem even in a narrow space.

Embodiments Hereinafter, embodiments of a laser beam image recording apparatus for microfilm according to the present invention will be described with reference to the accompanying drawings.

First, the overall configuration of the laser image recording apparatus will be described with reference to FIGS. 1 and 2.

This device is a desktop type in which all parts are housed in a main body frame (1), with the arrow (A) pointing toward the front.

The raw film cartridge (50) and the take-up cartridge (100) can be attached to a holder (not shown) that is slidably installed on the front right side of the main body frame (1). A film reel (95) wound with unexposed raw film is rotatably housed in the cartridge (50), and the raw film is transported between a feed-out drive roller (80) and a rotatable pinch roller (81) in contact with it. It is sent out from between.

A film reel is housed in the cartridge (100), and the recorded film is wound up by rotating the film reel (145) in the direction of arrow (a) in FIG.

The film running path is composed of a film path unit (150) installed on the front left side of the main body frame (1). , a guide member (160) that guides the film sent out from the raw film cartridge (50), a slack detector (161), a guide member (162), a main roller (170), a guide member (179), a slack detector ( 181), a guide member (182), a guide member (162), (1
82), there is a single clutch roller (163) that can rotate only in the film transport direction and a drive roller (183).
and a rotatable pinch roller (164) that contacts them.
, (184) are installed. Guide member (160
) is equipped with a film cutter (169), a film detection LED and a photosensor (SEI), and a guide member (182) is equipped with a film detection LED and a photosensor (SE2).

The sag detector (161) <181) is to ensure good running of the film for the stability of image recording, and is equipped with an LED and a photosensor (SE3) to detect the curved film in this part. ) to (SE6) are installed in two sets each. Further, the main roller (170) can be driven to rotate in the direction of arrow (b), and pinch rollers (171) and (172) are rotatably in contact with the periphery of the main roller (170).

The optical unit (200) is a unit consisting of a semiconductor laser (not shown), a polygon mirror for beam scanning, an fθ lens, etc., and a laser modulated on a microfilm held on the outer peripheral surface of the main roller (170). Irradiate the beam and record the image. In this recording device, 1
A 6 mm wet silver halide film is used to reduce the size of an A4 size image to 1/24 and record the image at a density of 9600 DPI. As shown in FIG. 3, this optical unit (200) is installed close to the main roller (170), has a slit (212a) through which the laser beam passes, and has a guide surface (212b), ( A guide plate (212) having a shape of 212c) is attached to the lens barrel (211) of the scanning lens (210).

This guide plate (212) constitutes the front frame of the lens barrel (211) in a state facing the outer peripheral surface of the main roller (170), and screws (21) , 3), (213) and lens barrel (2
11).

On the other hand, the optical unit (2) is located at the rear of the main body frame (1).
00〉, film bus unit (150) '4 power supply unit (10), various control boards (1
1> is accommodated.

Here, the running of the film will be explained.

Film is automatically loaded (autoloading). First, the film sent out from the delivery rollers (80) and (81) is conveyed to the slack detector (161) via the guide member (160), and furthermore, the film is sent to the slack detector (161) via the guide member (160), and then the film is sent to the slack detector (161) via the guide member (160).
163) and (164) to the main roller (17).
0), and the guide surface (212
b).

Main roller (170) while being guided by (212c)
The main roller (17) is wrapped around the outer circumferential surface of the
0), and the slack detector (1) is brought into close contact with the top of the slack detector (1
81). Furthermore, a slack control roller (18
3), a conveying force is applied at (184), and the film is wound onto the film reel (145) in the winding cartridge (100).

On the other hand, image recording by the optical unit (200) uses the laser beam scanning (scanning perpendicular to the top of the paper in FIG. 2) by the aforementioned polygon mirror as the main scanning, and the film is transported by the rotation of the main roller (170). is performed as a sub-scan. At this time, the main roller (170) is rotated at a constant speed.

When the film is detected by the photosensor (SE3) in the slack detector (161), the drive of the delivery roller (80>) is stopped, and when the film is no longer detected by the photosensor (SE4), the delivery roller (80) is stopped. The photosensor (80) is rotated in the slack detector (181).
When the film is detected in SE5), the roller (183)
, when the film reel (145) is rotated and the photo sensor (SE6) no longer detects the film,
Stop those drives. The above slack control is also performed during automatic film loading.

When the desired recording is completed, the cutter (169) is operated to cut the film and wind the cut film onto the film reel (145).

In the above configuration, during autoloading, the leading edge of the film is moved around the main roller (170) in the image exposure section by the guide surface (212b) of the guide plate (212).

(212c). The guide plate (212) is provided in front of the lens barrel (211), and is provided on the front of the lens barrel (211).
) is more space efficient than providing a separate part.

Further, as shown in FIG. 4, if a shutter (214) that can open and close the slit (212a) is provided and the slit (212a) is closed with the shutter (214) during autoloading, the leading edge of the film can be ) and the slit (212a) can be reliably prevented from entering the gap, improving reliability.

FIG. 5 shows a second embodiment, in which the optical unit (200)
The surface of the scanning lens (220) [main roller (170)
) is the cylindrical surface that has negative power in the direction parallel to the film transport direction, and the main roller (17
0) and the guide surface (220a) at the leading edge of the film.
In this embodiment, a guide surface (221a) having the same or substantially the same curvature as the guide surface (220a) is provided on the tip surface of the lens holding portion of the lens barrel (221).

(221b) was formed. When the lens surface itself is used as a guide surface, the risk of causing transport resistance at the leading end of the film or clogging, as in the case of the slit (211a) described above, is eliminated. Moreover, the guide surface (
By forming the rollers 221a) and (221b), the flow of the film near the pinch rollers (171) and (172) is improved.

FIG. 6 shows a third embodiment, in which the guide surface (220a) of the scanning lens (220) shown in FIG. 5 extends to the vicinity of the pinch rollers (171) and (172). There is. In this way, if only the lens guide surface (220a) is used to guide between the pinch rollers (171) and (172), the guide surface (220a) of the lens barrel (221) shown in FIG.
21a).

(221b) is eliminated, and the reliability of the film guide function is further improved.

Note that the image recording apparatus according to the present invention is not limited to the above-described embodiments, and can be variously modified within the scope of the gist.

For example, the basic configuration of the film pass unit (150) and the internal structure of the cartridge (SO) (100) are arbitrary.

Effects of the Invention As is clear from the above explanation, according to the present invention, a guide member for guiding the leading edge of the film in the film transport direction is attached to the lens barrel facing the main roller.
Alternatively, since the surface of the lens facing the main roller is used as a guide surface that guides the leading edge of the film in the transport direction, the guiding means for the leading edge of the film can be installed in an extremely narrow space between the main roller and the lens barrel. , automatic film loading can be performed reliably without any trouble.

[Brief explanation of drawings]

The drawings show an embodiment of the image recording device according to the present invention, and the first embodiment
The figure is a perspective view showing the schematic structure of the laser image recording device.
3 is an enlarged cross-sectional view of the image exposure section in the first embodiment; FIG. 4 is an enlarged cross-sectional view showing a modification of the one shown in FIG. 3; and FIG. FIG. 6 is an enlarged sectional view of the image exposure section in the second embodiment, and FIG. 6 is an enlarged sectional view of the image exposure section in the third embodiment. (50)...raw film cartridge, (100)...
... Winding cartridge, (150) ... Pull-up bath unit, (170) ... Main roller, (171
), (172)...pinch roller, (200)...
・Optical unit, (210)...scanning lens, (21
1) Lens barrel, (212) Guide plate, (212
a)...Slit, (212b), (212c)
... Guide surface, (220) ... Scanning lens, (220
a)...Guide surface, (221)... Lens barrel, (221
a), (221b)...Guide surface.

Claims (1)

[Claims] 1. The microfilm sent out from the film storage section is wound up to the film winding section via the film running path, and is emitted from the optical unit at the image exposure section provided in the middle of the film running path. In an image recording device that records an image on a film using a laser beam, an optical unit is installed close to a main roller that supports the back side of the film in an image exposure section, and a lens barrel facing the main roller is equipped with an optical unit. An image recording device comprising: a guide member that guides the leading edge of the film in the film transport direction. 2. The microfilm sent out from the film storage section is wound up to the film winding section through the film running path, and the film is exposed to the laser beam emitted from the optical unit at the image exposure section installed in the middle of the film running path. In an image recording device that records an image on the film, the optical unit is installed close to the main roller that supports the back side of the film in the image exposure section, and the surface of the lens facing the main roller is placed on the surface of the lens facing the main roller, and the leading edge of the film is placed on the film transport side. An image recording device characterized by having a guide surface that guides in a direction.