JPH0530917Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a phototypesetting machine, and more particularly to a structure for automatically correcting a deviation in printing position that occurs when a character image is rotated.

[Prior Art] A conventional character rotation structure in a phototypesetting machine will be explained using an optical system and a photosensitive drum shown in FIG.

First, a light beam a emitted from a light source lamp 1 is focused by a condenser lens 2 and transmitted through a dial plate 3. The light ray a transmitted through this dial plate 3 is reduced by a mask 4 to the light equivalent to one character, and further transmitted through a main lens 5 and a deformable lens 6. The main lens 5 is a lens for enlarging and reducing character images.

The light ray a transmitted through the deformable lens 6 enters the image rotating prism 7. And this image rotating prism 7
After passing through each surface of the photosensitive drum 10 , the light is reflected by a mirror 9 inside the photosensitive drum 10 via a shutter 8 .
In this way, a desired character image is formed on the photographic paper 11, and printing is performed by controlling the opening and closing of the shutter 8.

In printing operations, characters may be printed by rotating them at a desired angle. In such a case, the image rotating prism 7 is used to rotate the character image formed on the photographic paper 11. The image rotation prism 7 has a first
As shown in the figure, it is integrally fixed to a prism holder 12, and this prism holder 12 is rotatably supported by a main body 16.

A motor-side gear 15 meshes with a prism-side gear 13 provided on the prism holder 12, so that the prism holder 12 rotates in accordance with the rotation of the motor. In this way, the image rotation prism 7 is controlled to rotate freely relative to the main body 16, thereby making it possible to rotate the character image on the photographic paper 11 by a desired angle.

By the way, there is a predetermined printing position on the photographic paper 11, and for example, a virtual body f as shown in FIG.
It is necessary to print each character within. This is because if there is a shift in the position of each character to be printed, the uniformity of the character arrangement will be impaired.

In order to print characters at a predetermined position, at the reference point of the virtual body f (ideal optical axis A shown in Fig. 2),
Printing may be performed by aligning the center point c of the character image b. In other words, if settings are made so that the ideal optical axis A and the center point c of the character images b coincide, and the character images b are successively formed and printed on the photographic paper 11, the character positions can be unified. can.

Here, as described above, the image rotation prism 7 is fixed to the prism holder 12, which is further incorporated into and supported by the main body 16. In the process of assembling such prism parts, as shown in FIG. 3, a deviation may occur between the prism rotation axis O and the light beam a.

Even if the prism rotation axis O and the light beam a are misaligned, the ideal optical axis A and the center point c of the character image b are set to coincide in normal printing operations (see Figure 2 A). No particular problem arises. However, when the image rotation prism 7 is rotated, due to the misalignment between the prism rotation axis O and the light beam a (Fig. 3), the ideal optical axis A and the character image b are separated as shown in Fig. 2B.
The center c of is shifted. That is, deviation amounts d and e occur between the ideal optical axis A and the center point c of the character image b.

If the imaging position of character image b shifts in this way, the positional relationship with other printed characters that are not rotated will be inconsistent, resulting in variations in the character arrangement.

In order to eliminate the above-mentioned misalignment of printed characters,
Previously, printing was performed by performing minute feed operations while visually watching the monitor TV. Other methods include cutting out printed characters, adjusting the character arrangement, and pasting them together.

[Problems to be Solved by the Invention] However, the rotating structure of character images in the conventional phototypesetting machine has the following problems.

It takes a lot of time and effort to perform minute feeding operations using a monitor TV, cutting and pasting printed characters, and the precision is not sufficient.

Furthermore, if it is attempted to assemble each part of the prism by aligning the prism rotation axis O and the light beam a completely (see FIG. 3), the efficiency of the assembling work will deteriorate.

Therefore, the purpose of the present invention is to provide a phototypesetting machine that can easily and accurately eliminate the misalignment between the ideal optical axis and the center point of the character image, and that can reliably print characters at desired positions. shall be.

[Means for Solving the Problems] The phototypesetting machine according to the present invention includes a storage means for storing the amount of deviation between the ideal optical axis and the center point of the character image as a correction amount, which occurs in response to the rotation of the character image; Photographic paper driving means for loading the correction amount according to the rotation angle input into the rotation angle input means from the storage means and moving the position of the photographic paper so that the ideal optical axis and the center point of the character image coincide. It is characterized by

[Operation] In the phototypesetting machine according to the present invention, the storage means stores, as a correction amount, the amount of deviation between the ideal optical axis and the center point of the character image, which occurs in response to the rotation of the character image. Then, the photographic paper driving means takes in the correction amount according to the rotation angle input to the rotation angle input means from the storage means, and moves the position of the photographic paper so that the ideal optical axis and the center point of the character image coincide. let

Therefore, by simply inputting a desired rotation angle into the rotation angle input means, the position of the photographic paper is moved based on this rotation angle, and the deviation between the ideal optical axis and the center point of the character image is automatically corrected. Ru.

[Example] An example of the present invention will be described based on the drawings. FIG. 1 is a block diagram of a phototypesetting machine according to the present invention. Format data is input to the format data input device 20, and an output signal is outputted to the output control means shown in the figure. (image rotation prism rotation angle)
Correction data is input to the correction data input device 19 and stored in the correction data storage means 22.

The calculation means 21 takes in a signal from the format data input device 20 and a signal from the correction data storage means 22, and outputs a command signal to the output control means shown in the figure. The output control means controls the drive motor 18, the travel motor 17, and the image rotation prism rotation drive motor 14, respectively.

On the other hand, the light ray a emitted from the light source lamp 1 is condensed at condensation level 2, passes through the dial 3, and enters the image rotation prism 7 via the master 4 main lens 5 and the deformation lens 6. And the image rotation prism 7
After reflecting and passing through each surface inside, the shutter 8
It is reflected on the mirror 9 through the image, and a character image is formed on the paper 11. Incidentally, the rotation of the image rotation prism 7 is controlled by the drive of the image rotation prism rotation drive motor 14.

The photographic paper 11 is wound around a winding shaft inside the photosensitive drum 10 as the drive motor 18 is driven. The photosensitive drum 10 itself is moved in the direction of the winding shaft by a travel motor 17 and a rack and pinion mechanism. That is, by freely controlling the movement of the photographic paper 11 in two axial directions, it is possible to finely adjust the printing position.

In the phototypesetting machine shown in FIG. 1, the operation for correcting the deviation between the ideal optical axis and the center point of the character image will be described below. Assume now that there is a shift as shown in FIG. 3 between the prism rotation axis O of the image rotation prism 7 and the light beam a.

In this case, when the rotation angle of the character image d (FIG. 2A) is input as a rotation command from the typesetting data input device 20, the rotation command is given to the image rotation prism rotation drive motor 14 via the output control means. As the motor is driven, the image rotating prism 7 rotates, for example, by 45 degrees, and the character image d on the photographic paper 11 is rotated by 90 degrees (see FIG. 2B).

At this time, due to the deviation between the prism rotation axis O and the light beam a (FIG. 3), there is a deviation amount d between the ideal optical axis A and the center point c of the character image d on the photographic paper 11.
e will occur.

Here, the amounts of deviation d and e that occur with respect to the rotation angle of the character image d are always constant. For this reason, correction data is input and stored in the correction data storage means 22 in advance via the correction data input device 19. That is, the deviation amounts d and e for each rotation angle of the image rotation prism 7 are stored in advance as correction data.

When the rotation angle of the character image d is input from the typesetting data input device 20, the calculation means 21 takes in this rotation angle. At the same time, the amount of deviation (correction data) corresponding to this angle is taken in from the correction data storage means 22 and outputted to the output control means.

The output control means receives this correction data and drives the drive motor 18 and travel motor 17 to move the photographic paper 11. In other words, the character image d
The photographic paper 11 is moved and adjusted by the amount of deviation corresponding to the rotation angle of , and the deviations d and e are relatively eliminated, and the ideal optical axis A (the center point of the virtual body f) and the center point c of the character image d are match.

As described above, the character image d is formed at the proper position, and then the shutter 8 is opened and the photographic paper 1 is
Execute printing on 1.

Incidentally, instead of moving the photographic paper 11, the dial plate 3
may be moved. In this case, the correction amount is a value obtained by multiplying the correction data by the lens magnification.

[Effect of the invention] In the phototypesetting machine according to the invention, the storage means stores the amount of deviation between the ideal optical axis and the center point of the character image, which occurs in response to the rotation of the character image, as a correction amount. Then, the photographic paper driving means takes in the correction amount according to the rotation angle input to the rotation angle input means from the storage means, and moves the position of the photographic paper so that the ideal optical axis and the center point of the character image coincide. let

That is, by simply inputting a desired rotation angle into the rotation angle input means, the position of the photographic paper is moved based on this rotation angle, and the deviation between the ideal optical axis and the center point of the character image is automatically corrected. .

Therefore, it is possible to easily and accurately eliminate the misalignment between the ideal optical axis and the center point of the character image, and it is possible to reliably print characters at desired positions.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a phototypesetting machine according to the present invention, and FIG. 2 is a diagram showing the positional relationship between the ideal optical axis on photographic paper and the center point of a character image. 1 is a diagram showing a normal image formation state, 2 is a diagram showing a character image rotated by 90 degrees, and FIG. 3 is a diagram showing a deviation between a prism rotation axis and a light beam in a character image rotating prism. 7... Image rotation prism, 10... Photosensitive drum,
11... Photographic paper, 17... Travel motor, 18
... drum motor, 20 ... typesetting data input device, 21 ... calculating means, 22 ... storage means, A...
...Ideal optical axis, a...Light ray, d...Character image, c...
Center point, d, e...displacement amount.

Claims (1)

[Scope of Claim for Utility Model Registration] A light source that irradiates light toward a dial to generate a character image on photographic paper, and an image rotating prism installed on the optical path from the light source that rotates according to a rotation angle signal. An image rotating prism that is rotationally driven by a prism drive means to rotate a character image on photographic paper; a rotation prism that receives a desired rotation angle and outputs a rotation angle signal to the prism drive means in accordance with the rotation angle; In a phototypesetting machine equipped with an angle input means, a storage means for storing, as a correction amount, an amount of deviation between an ideal optical axis and a center point of the character image that occurs in response to rotation of the character image, and inputted into the rotation angle input means. Photographic paper driving means for loading the correction amount according to the rotation angle from the storage means and moving the position of the photographic paper so that the ideal optical axis and the center point of the character image coincide. Typesetting machine.