JPH0635231Y2 - Image recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an image recording apparatus, in particular, a photosensitive material is relatively moved a plurality of times in a photographing area while maintaining its planarity through a suction mechanism, and a plurality of positions on the photosensitive material are moved. The present invention relates to an image recording apparatus that separately exposes different images.

[Prior Art] Conventionally, an image displayed on a display device such as a monitor TV is divided into a photosensitive sheet film such as an X-ray film and exposed, and a plurality of images are taken on one film. The machine is known. In this type of device, an optical system that automatically picks up the film one by one from a supply magazine that stores a large number of unexposed films and supplies it to the shooting surface, and projects the film and the display image surface of a monitor TV, etc. The film is moved relative to one another to form an image on a plurality of locations on a single film and then stored in a receive magazine, and then the film is sent to a developing machine for development processing.

[Problems to be Solved by the Invention] In the above-described device, in order to fully utilize the performance of the photographing optical system and accurately record an image with high resolution, the flatness of the sheet-like film at the photographing position is required. Of course, we have to secure.

Therefore, conventionally, as shown in FIG. 3, a structure is known in which the film is suction-held on the photographing surface. In FIG. 3, reference numerals 12 and 15 denote film conveying rollers which are rotationally driven by a driving means (not shown) to convey the film in the direction of the arrow. The photographing position is a substantially intermediate position between the rollers 12 and 15 or a predetermined position near the roller 12, and an optical system (not shown) for projecting an image is arranged at a position corresponding to the lower part of the drawing.

The rollers 12 and 15 sequentially move the film at the shooting position, so that a plurality of projection images of the shooting optical system can be displayed on one film.
Record separately. The shooting plane is the position of the arrow in the figure, and the film must maintain sufficient flatness in this plane.

The shooting surface box 26 is for holding the film on the shooting surface by suction, and has a large number of small holes 27a on its lower surface for applying a negative pressure to the back surface of the film. Further, a small hole 27b for applying a negative pressure from a drive system such as a vacuum pump (not shown) is provided on the upper surface. A sensor 13 (photosensor or the like) for detecting the timing when the film is introduced onto the photographing surface is arranged near the roller 12.

In the conventional configuration as described above, the entire surface of the film is not in close contact with the shooting surface box 26 during the shooting period in which a plurality of image recordings are performed, and at the beginning of shooting, for example, immediately after the film introduction is detected by the sensor 13. During shooting, only the edge area of the film is sucked by the shooting surface box 26. However, as the filming progresses, the film is sequentially transferred in the left direction in the drawing, so that almost the entire surface of the film is sucked by the shooting surface box 26 at the timing of shooting the final image.

Therefore, the number of small holes 27a of the photographing surface box 26 that is blocked by the film is different at the beginning and the end of photographing, and the film is deflected downward due to insufficient suction force at the beginning of photographing, and an image defect occurs. When it approaches the end, the suction force becomes too large, which hinders the film transfer, and there is a possibility that a shooting position shift or jam occurs. By adjusting the negative pressure applied to the imaging surface box 26, such a problem can be dealt with to some extent, but it is difficult to properly adjust the negative pressure with the conventional configuration.

An object of the present invention is to solve the above problems, and when the photosensitive material is sequentially transferred on the photographing surface, an appropriate suction force is applied to the film regardless of the transfer position so that the flatness of the film can be reliably ensured. That is.

[Means for Solving the Problems] In order to solve the above problems, according to the present invention, the photosensitive material is relatively moved a plurality of times in the photographing region while maintaining its planarity through the negative pressure applying means, and the photosensitive material is moved. In an image recording apparatus that separately exposes different images to a plurality of upper positions, it has a plurality of negative pressure applying means arranged along the relative movement direction in the photographing region of the photosensitive material, and according to the relative movement of the photosensitive material. A configuration is adopted in which the plurality of negative pressure applying means are sequentially operated from the one arranged on the conveying side of the photosensitive material to relatively move the photosensitive material while sucking the photosensitive material.

[Operation] According to the above configuration, among the plurality of negative pressure applying means arranged along the relative movement direction in the photographing area of the photosensitive material according to the relative movement of the photosensitive material, the negative pressure applying means is arranged on the conveying side of the photosensitive material. When the photosensitive material is moved relative to each other while the photosensitive material is being sucked and the photosensitive material is moved relative to the photosensitive material, an appropriate suction force can be applied according to the relative movement position of the photosensitive material in the shooting area. The flatness and smooth transfer of the material can be surely guaranteed.

[Embodiment] Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 shows the structure of an image recording apparatus adopting the present invention.

In FIG. 1, reference numeral 1 is a supply magazine for storing the sheet film, and the film 2 stored in the supply magazine 1 is taken out by suction of one of the upper layers by a suction plate 5 driven by motors 3 and 4. And is sent to rollers 6 and 8 driven by a motor 7. The film advances to the rollers 6 and 8 and is further fed to the roller 9.
The roller groups 12, 15, 16 and 17 in the processes after the roller 9 are intermittently driven by the pulse motor 18.

When the trailing edge of the film 2 that has entered the roller 8 to the roller 9 reaches the position of the photo sensor 10, the roller 9 rotates in the reverse direction and the film 2 is fed in the reverse direction. At this time, the tip of the film 2 is a guide plate
It is guided by 11 and advances to the roller 12, and when the leading edge of the film 2 reaches the photo sensor 13, it stops once, and the pulse motor 18 is pulse-driven by the CPU incorporated in the control circuit with this position as a reference point and stored in advance. The film 2 is moved to the predetermined exposure position, and an image is taken on the TV monitor 25.

Filming in the traveling direction of film 2 is as described above.
The shooting is performed in a direction other than the film advancing direction, that is, in the vertical direction in the drawing by moving the TV monitor 25 by the drive device 19 in the vertical direction in the drawing. That is, a plurality of images arranged in rows and columns are obtained by a combination of movement of the TV monitor 25 in the vertical direction (row direction) and movement of the film 2 (column direction).

When the predetermined photographing is completed, the rollers 15, 12, 9 are reversed and the film 2 returns to the roller 9, and when the trailing edge of the film reaches the photo sensor 10, the pulse motor 18 is stopped and the guide plate 11
Is moved by the drive mechanism 20 to the position indicated by the broken line.

Next, the pulse motor 18 starts reversing, the roller 9 moves the film 2 in the upper direction in the figure, and the film 2 moves the guide plate 21,
Guided by 22 and conveyed to rollers 16 and 17, and stored in receive magazine 23, the photographing is completed.

The photographing surface box 26 provided on the photographing surface is for maintaining the flatness of the film by sucking air with a vacuum pump (not shown) to suck the film 2 to the lower plane.

FIG. 2 shows the structure of the photographing surface box 26 in detail. Figure 2 is third
The structure of the photographing surface box 26 according to the present invention is shown in the same format as the conventional example shown in the figure.

In the present embodiment, the inside of the imaging surface box 26 is not a single negative pressure chamber as shown in FIG. 3, but a plurality of (here, four) negative pressure chambers 27.
It is composed of 1-274.

The number of divisions of the negative pressure chambers 271 to 274 is, for example, the number of times the film is relatively moved in the left and right direction in FIG. 2 during the entire shooting period for one film, and the negative pressure chambers 271 to 272 in the left and right direction in the drawing are shown.
The length of 74 is almost matched to the relative movement amount of one film.

The negative pressure applied to each of the negative pressure chambers 271 to 274 is supplied from the small hole 27b by a separate drive system such as a vacuum pump. Also, the arrangement of the small holes 27a on the lower surface of each negative pressure chamber 271 to 274,
The number and size are the same. These negative pressure chambers 27
1 to 274 and their small holes 27a and 27b constitute independent load applying means.

The photographing process in the above structure is executed as follows.

First, when the sensor 13 detects that the leading end of the film is introduced into the photographing region, the negative pressure chamber 271 sucks the film, and the roller 12 feeds the leading end region of the film to the left side in FIG. 2 for a predetermined distance.

When the image of the first line is recorded by the TV monitor 25, a negative pressure is applied to the leading end region of the film by the negative pressure chamber 271 of the photographing surface box 26.

When the TV monitor 25 is moved to record the image on the first line on the film and then record the image on the second line,
While applying a negative pressure in the negative pressure chamber 272, the roller 12 further transfers the film to the left side in FIG. The same applies to the photographing from the third row onward, and the negative pressure chambers 273 and 274 are divided and the film is transferred while applying a negative pressure.

According to such a configuration, the negative pressure chamber of the imaging surface box 26 is designated by reference numeral
Since it is divided as 1 to 274, it is possible to apply a substantially constant negative pressure to a predetermined area on the film regardless of the film transfer position. Therefore, the suction force per fixed area of the film is almost constant throughout the divided recording period of the image due to the relative movement of the film, ensuring the flatness of the film at any transfer position and ensuring smooth film transfer. can do. Therefore, unlike the conventional case, there is no possibility that the suction force is too weak or too strong at the beginning and the end of the image recording period to cause an image defect or a recording position shift, and a high-quality image recording is surely performed. Can be done.

Although the example in which the negative pressure chamber 271 of the imaging surface box 26 is divided into four has been shown above, the number of divisions is not limited to this, and the negative pressure chamber in the film transfer direction is not necessarily limited to the above. It is not necessary to match the number of lines with the number of shooting lines.

[Advantage of the Invention] As is apparent from the above, according to the present invention, among the plurality of negative pressure applying means arranged along the relative movement direction in the photographing region of the photosensitive material according to the relative movement of the photosensitive material. ,
Operate sequentially from the one arranged on the conveying side of the photosensitive material,
By performing relative movement of the photosensitive material while sucking the photosensitive material, it is possible to apply an appropriate suction force according to the relative movement position of the photosensitive material in the photographing area, and the flatness and smoothness of the photosensitive material during photographing can be achieved. There is an excellent effect that the transfer can be surely guaranteed, and a high-quality image can be surely recorded without causing an image defect or a recording position shift.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the structure of an image recording apparatus adopting the present invention, FIG. 2 is a cross-sectional view showing the structure of a photographing surface box at the photographing position of the apparatus shown in FIG. 1, and FIG. FIG. 3 is a cross-sectional view showing a structure of a shooting surface box at a shooting position of the image recording apparatus. 1 ... Supply magazine, 2 ... Film 3, 4, 19 ... Motor, 5 ... Adsorption board 6, 8, 16, 17 ... Roller 7 ... Motor, 8, 9 ... Roller 10, 13, 24 ... Photo sensor 11 ... Guide plate , 18 ... Pulse motor 25 ... TV monitor, 26 ... Shooting box 27a, 27b ... Small holes 271-274 ... Negative pressure chamber

Claims (1)

[Scope of utility model registration request] 1. An image recording apparatus, wherein a photosensitive material is relatively moved a plurality of times in a photographing region while maintaining its planarity via negative pressure applying means, and different images are separately exposed at a plurality of positions on the photosensitive material. A plurality of negative pressure applying means arranged along the relative movement direction in the photographing area of, and the plurality of negative pressure applying means arranged on the conveyance side of the photosensitive material according to the relative movement of the photosensitive material. Operate sequentially,
An image recording apparatus characterized in that the photosensitive material is moved relative to one another while sucking the photosensitive material.