JP2562715Y2 - Register mark automatic exposure system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an automatic exposure apparatus for register marks used for registering multicolor printing.

[Prior Art] Conventionally, in multi-color printing using an offset rotary press or the like, in order to eliminate the deviation of each color in a printed matter, each register mark is provided on a plate of each color, and the arrangement of these marks appearing after printing is determined. A relative position is read by a scanner and compared with a predetermined relative positional relationship. If there is a deviation, feedback is provided to a printing press to move each cylinder and register automatically. The printing of the filter master and the register mark may be performed manually by using a burning frame or by a robot using an automatic printing machine.In each case, the register mark is printed on the surface of the film master. Printing is performed using a dedicated mask having a mark position corresponding to the mark.

[Problem to be Solved by the Invention] In the conventional method of register mark printing as described above, many types of dedicated masks corresponding to the imposition state must be prepared, and the management thereof is very troublesome. There was a problem that it is.

In particular, a dragonfly is drawn on the plate material surface in advance, and printing is repeatedly performed using a normal printing frame while covering the register mark of the film original with the register mark (the other surface is covered with black paper, etc.). In the method, it is necessary to manually perform the printing operation twice on the film master and the register mark. In addition, in order to maintain the positional relationship between the marks, the printing is usually performed at once using a mask having all the marks of each color. Since the other marks are manually erased later, there is a problem that the printing plate process for printing the original film and the register mark requires a long time.

The present invention has been made in view of such a problem, and an object thereof is to provide a register mark automatic exposure apparatus which can quickly and accurately print a register mark without requiring a dedicated mask. It is something to offer.

[Means for Solving the Problems] In order to achieve the above object, the register mark automatic exposure apparatus of the present invention uses a pair of parallel main guide rails and a sub guide rail bridged by the guide rails. A drawing head that is movable in the vertical and horizontal directions and that is provided so as to be set at a predetermined position on the base;
It consists of a spot light source device that is attached to the end of the sub guide rail and generates ultraviolet light instantaneously, an optical fiber that extends from this light source device to the drawing head, and a tip of the optical fiber, and can move up and down to the drawing head , And a mask provided on the tip end surface of the exposure unit and having a shape corresponding to the register mark to be printed.

[Operation] According to the register mark automatic exposure apparatus described above, the exposure portion constituted by the optical fiber tip portion descends, and the register mark is printed in a state of being in close contact with the PS plate or the like.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic view showing an automatic marking apparatus equipped with a register mark automatic exposure apparatus according to the present invention.

As shown in the figure, the original film and the register mark are printed by using the printing frame of the automatic marking apparatus 1, and have the same configuration as the XY plotter as a whole. That is, the drawing head 2 is movably attached to the sub guide rail 3, and the sub guide rail 3 is movably mounted at both ends to a pair of main guide rails 4. 5 can be moved back and forth, right and left, and can be set at an arbitrary position on the base 5. A spot light source device 6 for instantaneously generating ultraviolet light is attached to an end of the sub guide rail 3, and an optical fiber 7 extends from the light source device 6 to the drawing head 2. The tip of the optical fiber 7 forms an exposure unit 8, which is supported by the drawing head 2 so as to be movable up and down with respect to a PS plate or the like placed on the base 5. It reciprocates between a contact position and a distant position. Although not shown, a circular or square mask corresponding to the shape of the register mark to be printed is provided on the tip end surface of the exposure unit 8.

As shown in an enlarged manner in FIG. 2, the drawing head 2 includes a light-shielding pen 9, a marking needle 10, and a plate identification mark pen 11, in addition to the exposure unit 8, which are mounted on the base 5. Each can be moved up and down between a position where it comes into contact with a positive PS plate or the like and a position where it is separated. If a negative type is used as the PS plate, etc.,
There is no need to attach. The marking needle 10 is used for drawing a register mark for pasting the original film, and may be a needle-shaped writing instrument such as a ball-point pen.

Reference numeral 12 denotes a personal computer as a control device. By operating the personal computer, the operation of the drawing head 2 can be controlled based on predetermined data input in advance or data input manually. That is, the vertical movement of the exposure unit 8, the light-shielding pen 9, the marking needle 10, and the plate identification mark pen 11 are controlled, and the vertical and horizontal movements of the drawing head 2 are controlled.

Next, using such an automatic marking device 1, a positive type
A process of printing a register mark on a PS plate or the like will be described. First, set a positive PS version etc. on the base 5,
As in the normal marking operation, a registration mark for attaching the film original is written at a predetermined position using the marking needle 10.
When the registration mark drawing operation is completed, the exposure unit 8 is moved to a predetermined position for register mark printing, and the register mark is printed by close contact exposure. In this case, strong ultraviolet light is converged from the spot light source device 6 through the optical fiber 7 to the exposure unit 8, and this ultraviolet light is instantaneously applied to a PS plate or the like, and the tip surface of the exposure unit 8 is exposed. Printing of a mark corresponding to the shape of the mask is performed. Next, a paint is applied to the place where the register mark is printed by the light-shielding pen 9. As a paint used for the light-shielding pen 9, a pigment having a property of shielding ultraviolet light and dissolving in a development step performed later is used. When a negative type PS plate or the like is used, it is not necessary to cover the register mark with paint as described above, so that the light-shielding pen 9 does not need to be attached to the drawing head 2. After that, an identification mark is written on one corner of a PS plate or the like so that the plate identification mark pen 11 can identify the color of the plate provided with the register mark. The above series of steps is performed under the control of the position data for each imposition set in the control device 12 in advance. In addition, for a special imposition, it is of course possible to input data manually and perform each step.

Then, after these steps, the printing operation of the film original is performed to complete the preparation of the printing plate. When using a positive PS plate or the like, since a paint that does not transmit ultraviolet light is applied to the part where the register mark is printed as described above, this part is used during printing of the original film. Is performed without covering the mask with a mask.

As described above, in the automatic marking device 1, the register mark is continuously formed at the place where the operation of drawing the register mark as a mark when imposing and pasting the film original on the raw PS plate or the like is completed. It will be burned. Therefore, the printing of the register mark by the exposure unit 8 is performed before the printing of the film master, contrary to the conventional method. For this reason, when using a positive PS plate or the like, the portion where the register mark is baked is covered from above with the paint as described above so that the portion is not exposed even when light for baking the film original plate is applied later. Like that.

In the automatic marking device 1 described above, a device in which only the exposure unit 8 is attached to the drawing head 2 can be used satisfactorily.
, Shading pen 9, marking needle 10, and plate identification mark pin 11
It is preferable to attach the marking needle 10 and the plate identification mark pen 11 to the drawing head 2 for the negative PS plate or the like. It is preferable to use it in such a process.

FIG. 3 is a schematic view showing an automatic printing machine equipped with the register mark automatic exposure device according to the present invention.

The automatic stencil plate 21 shown in the figure is of a conventionally known type,
An original supply unit 23, a printing plate baking unit 24, and an original discharge unit 25 are provided on the inclined base 22, and a light source unit 26 that moves between these units is provided. That is, the light source unit 26 can move left and right along with the machine frame 28 along a pair of upper and lower guide rails 27, and the light source unit 26 itself can move left and right along a pair of upper and lower sub guide rails 29 on the machine frame 28. It is movable and can move up and down along a pair of left and right main guide rails 30. Although not shown in the figure, the light source 26
A photosensitive material holder on which a printing plate such as a PS plate is set is provided below the printer. The drawing head 31 is attached to the side surface of the light source unit 26, and the upper sub guide rail 29
The tip of an optical fiber 33 extended from the spot light source device 32 attached to the end of the light source device 32 forms an exposure unit 34. The exposure unit 34 is vertically movably supported by the drawing head 31 as in the previous embodiment, and reciprocates between a position where it comes into contact with a PS plate or the like set in the photosensitive material holder and a position where it is separated. It is supposed to. Further, the point that a circular or square mask corresponding to the shape of the register mark to be printed is provided on the tip end surface of the exposure unit 34 is the same as that of the previous embodiment. Further, the drawing head 31 includes
In addition to the exposure unit 34, a light-shielding pen similar to that of the previous embodiment,
A plate identification mark pen is attached as needed.

Then, based on predetermined data input in advance to a control device (not shown) or data input manually, a light source unit is provided.
The movement of the up / down / left / right movement of 26 and the operation of each part of the drawing head 31 can be controlled.

In such an automatic printing machine 21, a printing plate such as a PS plate is first set on a photosensitive material holder manually or automatically by a transport device. Then, in the same manner as in the previous embodiment, the printing operation of the register mark is performed by each part of the drawing head 31 on this printing plate, and when a positive PS plate or the like is used for the printing plate, The work of applying the paint with the light-shielding pen is performed, and finally the work of writing the identification mark is performed. Next, the film original is sucked and held at the position of the original supply unit 23 by the original holder integrated with the light source unit 26,
After the film master is moved to the position of the printing plate printing unit 24, the printing plate is subjected to printing printing of the film master. Then, when the printing plate printing is completed, the film original is discharged to the original discharge section 25 by the original holder. On the other hand, the printing plate having been printed is discharged manually or automatically by a transport device. The above series of steps is performed under the control of the position data for each imposition set in the control device in advance. In addition, for a special imposition, it is of course possible to input data manually and perform each step.

In the above embodiment, the example in which the register mark automatic exposure device of the present invention is applied to the automatic plate printing machine 21 in which the light source unit 26 moves is described. It is needless to say that the present invention is also applicable to an automatic printing machine of a type in which a printing original plate moves, for example.

[Effects of the Invention] The present invention has the effects described below because it is configured as described above.

Since a dedicated mask having a mark position corresponding to the imposition is not required in the register mark printing process, there is no need to perform baking using a mask twice as in the past, and a complicated operation for managing many dedicated masks. Can be eliminated, so that the time required for the printing plate process can be reduced.

In addition, since strong ultraviolet light is guided to the exposure section by the optical fiber, the register mark can be printed by spot exposure, so that the printing operation can be performed in a short time.

Since the spot light source device and the exposure unit are separately disposed in such a manner that the exposure unit can move freely, the exposure unit supported by the drawing head can be reduced in weight, so that the drawing head can operate with high accuracy and at high speed. As it becomes possible,
The exposure unit does not have heat, and it is possible to maintain accuracy and maintain quality during long-time operation.

Furthermore, since the drawing head having an exposure unit that can move up and down can be moved to and set at an arbitrary position on the base by data input to the control device, the printing position of the register mark can be arbitrarily controlled, and the Can be made into a database.

[Brief description of the drawings]

FIG. 1 is a schematic view of an automatic marking device equipped with the register mark exposure device of the present invention, FIG. 2 is an enlarged view of a drawing head portion having the register mark attached thereto, and FIG. 3 is equipped with the register mark exposure device of the present invention. FIG. DESCRIPTION OF SYMBOLS 1 ... Automatic marking device, 2 ... Drawing head, 3 ... Sub guide rail, 4 ... Main guide rail, 5 ... Base, 6 ...
... Spot light source device, 7 ... Optical fiber, 8 ... Exposure unit, 9 ... Shading pen, 10 ... Marking needle, 11 ... Mark identification pen, 12 ... Control device, 21 ... Automatic plate machine ,twenty two…
… Base, 23… Original plate supply unit, 24… Plate printing unit, 25…
Original discharge unit, 26 Light source unit, 27 Guide rail, 28
... machine frame, 29 ... sub guide rail, 30 ... main guide rail, 31 ... drawing head, 32 ... spot light source device, 33 ...
... Optical fiber, 34 ... Exposure unit

Claims (1)

(57) [Scope of request for utility model registration] A pair of parallel main guide rails and a sub guide rail bridged by the guide rails allow the base to be moved vertically and horizontally on a base and settable at a predetermined position on the base. It is composed of a provided drawing head, a spot light source device attached to the end of the sub guide rail, which instantaneously generates ultraviolet light, an optical fiber extending from the light source device to the drawing head, and a tip portion of the optical fiber. A register mark automatic exposure apparatus, comprising: an exposure section supported by a drawing head so as to be movable up and down; and a mask provided on a tip end surface of the exposure section and having a shape corresponding to a register mark to be printed.