JP2898510B2 - Color separation plate forming device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color separation plate forming apparatus for preparing a color separation plate for obtaining a color print.

[0002]

2. Description of the Related Art To obtain a color print, first, a plurality of color separation image data, such as C (cyan), M (magenta), and Y, which express a color image, are output by a color separation plate forming apparatus called an output scanner. (Yellow) and K
Each color separation plate is created based on the (black) color separation image data, and thereafter, a printing machine is overprinted with each color ink using the plurality of color separation plates to obtain a color print. When overprinting the plurality of color separations, a hole serving as a reference position is formed in each color separation, and each color separation is overprinted based on this hole, in order to prevent a positional shift of each color separation. ing.

Conventionally, a color separation plate forming apparatus is provided with a punch means for making a hole serving as a reference. The punching means is provided on a path for transporting the photosensitive film to a holding unit such as a drum.
After a hole is formed by the punch means, the hole is mounted on a holding unit such as a drum, and then the photosensitive film is exposed based on the color separation image data to form a color separation image.

[0004]

However, in the prior art, since a hole is formed in the photosensitive film before the film is mounted on the drum, the film is formed on the photosensitive film unless the mounting position of the film with respect to the drum is precisely determined. The relative positional relationship between the color-separated image and the holes slightly differs for each color-separated plate, so that a plurality of color-separated images do not match at the time of printing, and there is a high possibility that a color shift or the like will occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a color separation plate forming apparatus capable of making the relative positional relationship between a film positioning hole and a color separation image coincide with each color separation plate. To provide.

[0006]

According to the present invention, a color-separated image is formed on a photosensitive film mounted on a drum-type film holding portion based on a plurality of color-separated image data representing a color image in order to achieve the above object. In the color separation plate forming device,
Image forming means for forming an color separation images based on the color separation image data on a photosensitive film attached to the drum film holding section, a state where the photosensitive film is mounted on the drum type film <br/> holder In the drum type film
And a punch means for punching a hole in the photosensitive film held in the camera.

In this case, it is preferable that the apparatus further comprises a control means for operating the punch means after the color separation image is formed by the image forming means.

[0008]

According to the above construction, a punching means is operated in a state in which a photosensitive film is mounted on the drum type film holding portion to make a hole in the film, whereby a color separation image of the film formed by the image forming means is formed. and the relative positional relationship between the holes always match, it is possible to eliminate the color shift at the time of printing due to the mismatch of the relative positional relationship between the color separation picture image and holes in the film.

Further, the control means operates the punch means after the completion of the image forming operation in which the relative positions of the drum type film holding portion and the photosensitive film F are substantially equal to each other, whereby the holes can be formed at more accurate positions.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A color separation plate producing apparatus according to the present invention will be described based on an embodiment shown in the drawings. FIG. 1 is an overall side view of a color scanner showing an embodiment of the present invention, and FIG. 2 is a plan view thereof. This color scanner is configured as follows.

(Overall Configuration) A drum 1 on which a photosensitive film F is deposited, and an upstream side in the rotation direction of the drum 1 (that is, the drum 1
And a film supply unit 2 that supplies the unexposed film F to the downstream side in the rotation direction of the drum 1 (that is, a film F wound around the drum 1). Exposure means 3 in which light source 3a composed of a plurality of LEDs faces drum peripheral surface 1a, front end pressing means 10 disposed on drum peripheral surface 1a, and rear end pressing means 20
And a squeegee unit 40 and punching means 60 and 61.

(Structure of Film Supply Unit 2) The film supply unit 2 is provided with a film magazine 2c for accommodating the photosensitive film F in a roll shape and a supply roller 2b in an opening 2a thereof. Film F
Downstream of the flow direction, a sensor 4 for detecting the leading end of the film F and a cutter 5 for cutting the film F to a predetermined length.
Is provided. The cutter 5 is the cutter motor 1
11 is operated by driving.

(Structure of Drum 1) The drum 1 is formed in a hollow cylindrical shape having a relatively large diameter, and a plurality of grooves 1c (FIG. 2) are provided on a part of its peripheral surface 1a to form frames 9 on both sides. , And both ends of the drum 1 are closed by flange-shaped side plates 1b. As shown in FIG. 2, one end of a rotating shaft 90 of the drum 1 is connected to a pulse motor 6 via a coupling, and a notched disk 7 which rotates synchronously with the drum 1 is provided at the other end. The sensor 8 reads the notch in the plate 7 to detect the origin A (reference position) of the drum 1, and manages the number of pulse signals for driving the pulse motor 6 based on the detection result. The rotational position of the drum 1 can be always grasped.

Here, the origin A means a position where the tip pressing means 10 exists near the contact point between the transport direction of the film F and the drum peripheral surface 1a as shown in FIG. (Configuration of tip holding means 10)
As shown in FIG. 2, the swing arm 10b swings up and down in conjunction with the rotation of the first eccentric cam 30, and a base shaft 10 of the swing arm 10b.
a plurality of tip holders 10d fixed at intervals c
And a base shaft 10c of the swing arm 10b, a bearing 10e provided on the drum peripheral surface 1a for supporting the base shaft 10c in a rotatable manner, and a tip holding member 10d pressed against the drum peripheral surface 1a. 3, a locking member 10h, such as a rubber sheet, is attached to a surface of the distal end holding member 10d facing the drum peripheral surface 1a, as shown in FIG. I have.

(Structure for Driving the Tip Holder 10) The tip holder 10d shown in FIG. 3 is brought into close contact with the drum peripheral surface 1a as shown in FIG.
The first and second eccentric cams 30 and 31 are driven by a frame 9 such that the first and second eccentric cams 30 and 31 are driven via a transmission mechanism 11a (FIG. 2) including a plurality of gears.
It is provided in.

As shown in FIG. 4, the first eccentric cam 30 is driven by the motor 11 via the transmission mechanism 11a when the tip pressing means 10 is at the origin A position of the drum 1. Is engaged with the swing arm 10b,
The tip holder 10 against the elastic force of the spring 10f
d is lifted to open the inlet side 10g so as to sandwich the leading end of the supplied film F.

The second eccentric cam 31 is driven in conjunction with the motor 11 via the transmission mechanism 11a when the front end pressing means 10 is at the position B for releasing the film F, and its high position peripheral surface is swung by the swing arm 10b. Spring 10f
The opening 10g is opened by opening the front end holding member 10d against the elastic force of the above, and the front end of the pressed film F is released.

As shown in FIG. 2, the two eccentric cams 30, 3
1 is linked to the same drive source (motor) 11 via a transmission mechanism 11a having a gear 11b with a built-in one-way clutch, and drives both eccentric cams 30, 31 when the motor 11 rotates forward. During the reverse rotation of the motor 11, only the eccentric cam 31 is driven. or,
When the two eccentric cams 30 and 31 are in a stationary state, the stationary position is controlled by the operation of a not-shown additional sensor so that the respective high-position peripheral surfaces cannot be engaged with the swing arm 10b. Has been established.

(Structure of rear end pressing means 20) As shown in FIGS. 1, 2 and 5, the rear end pressing means 20 is located downstream of the front end pressing means 10 on the drum peripheral surface 1a in the drum rotation direction. And a rear end holding member 20a having a predetermined width parallel to the axial direction of the drum 1 and having a uniform axial length, and a rear end holding member 20a.
a, one end of which is connected to both ends of the drum side plate 1b.
And a support plate 20c which is swingably supported through a long hole. Further, as shown in FIG. 5, a tension spring 20e hung between the support plate 20c and the drum side plate 1b.
And a triangular cam 20d which engages with a square window hole 20b formed in the center of the support plate 20c.

Further, as shown in FIG. 2, a notch disk 20k for detecting the rotational position of the triangular cam 20d and a sensor 21 facing the notch disk 20k are provided. 5 to 8 show the operation state of the rear end pressing means 20. When the drum 1 makes about one rotation while winding the film F, the coupling 20
g is connected by a solenoid (not shown), and when the motor 11 rotates in the reverse direction, the triangular cam 20d makes one rotation.

First, the rear end holding member 20a is always brought into pressure contact with the drum peripheral surface 1a by the action of the tension spring 20e, and the rear end holding member 20a is rotated by about 1/4 rotation of the triangular cam 20d. The holding member 20a separates from the drum peripheral surface 1a against the elastic force of the spring 20e (FIG. 5), and the next rotation transition of the triangular cam 20d (about 1/4).
Rotation) on the rear end of the film F to hold the rear end holding bracket 20a.
Is moved (FIG. 6), and the rear end of the film F is pressed against the drum peripheral surface 1a by the rear end holding member 20a in the next rotation transition (about ４ rotation) of the triangular cam 20d (FIG. 7). Has been established.

In the rotation transition (approximately 1/4 rotation) of the triangular cam 20d, the rear end holding member 20a presses the rear end of the film F against the drum peripheral surface 1a while moving along the drum peripheral surface 1a. The film F is caused to act in a direction of tension. By operating the rear end holding member 20a as described above, the film F can be attached to the drum 1 while being pulled.

FIG. 9 shows the movement trajectory of the rear end holding member 20a in the operating state shown in FIGS. (Structure of the squeegee unit 40) On the downstream side in the rotation direction from the origin A position of the drum 1, as shown in FIGS. A queuing unit 40 is provided.

The squeegee unit 40 has a base supported by the frame 9 so as to swing by the operation of a solenoid 40s, and includes a squeegee roller 40a and a peeling claw 45. Squeegee roller 40a
Has a length approximating the axial length of the drum 1, is formed in a small-diameter cylindrical body, is parallel to the axial direction of the drum peripheral surface 1 a, and is rotatable around the free end of the squeegee unit 40. The squeegee unit 40 is supported so as to come into contact with and separate from the drum peripheral surface 1a by the swinging operation of the squeegee unit 40.
Squeegee roller 40a and drum peripheral surface 1
a to prevent the floating of the film F wound around the drum peripheral surface 1a.

At one end of the shaft of the squeegee roller 40a, a disc-shaped roller 4 having a diameter larger than that of the squeegee roller 40a is provided.
0b is integrally fixed. When the solenoid 40s is excited, the peripheral surface of the roller 40b has a second eccentric cam 31 for releasing the pressing operation of the tip pressing means 10.
When the second eccentric cam 31 rotates in the direction of the arrow in FIG. 1, the peripheral surface of the roller 40 b is in contact with the high-position peripheral surface of the second eccentric cam 31. The squeegee roller 4 engages and rotates in the opposite direction to the winding direction of the film F.
The film F is slid on the peripheral surface of the drum 0a on the peripheral surface of the film 0a, and the film F is slid to relax the state of contact with the drum peripheral surface 1a. Peeling nail 45
Is driven by a solenoid 45b.

The peeling claw 45 is disposed at a position facing the groove 1c formed on the drum peripheral surface 1a, and fixes the base to one and the same shaft 45a. The free end portion is pivotally supported on the frame body so as to pivot about the shaft 45a by the operation of the solenoid 45b, and the peeling claw 45 pivots toward the drum peripheral surface 1a. At this time, the free end portion enters the plurality of grooves 1c formed on the drum peripheral surface 1a, and the rotation of the drum 1
The film F wound around the peripheral surface 1a is peeled off so as to be scooped up on the back surface of the peeling claw 45.

(Structure of Punch Means 60, 61) The punch means 60, 61 are provided at both ends of the tip pressing means 10 provided on the drum 1, as shown in FIG. The punch means 60 and 61 form a perfect hole and an oblong hole at the tip of the photosensitive film F, respectively. Also,
The punching operation by the punching means 60 and 61 is performed when the punching means 60 and 61 are located at the lower part of the drum 1. Chips of the photosensitive film F generated at this time fall and are provided below the drum 1. The waste is collected in the waste receptacle 80.

As shown in FIGS. 10 and 11, the punch means 60 is provided with a punch pin 6 which can be retracted on the drum peripheral surface 1a.
6a, an upper block 62 fixed on the peripheral surface 1a of the drum 1, a lower block 63 provided so that the upper surface of the drum 1 coincides with the upper surface, and a solenoid 66 fixed inside the drum 1. It is composed of When the solenoid 66 is not excited, as shown in FIG. 10, a punch pin 66a (a portion shown by oblique lines in the figure) is buried inside the drum 1. On the other hand, when the solenoid 66 is excited, as shown in FIG. 11, the operating plate 64 moves in the direction of arrow A, and accordingly, a punch pin 66a connected to the operating plate 64 (shown by hatching in the figure). Part shown)
Is inserted into a hole 69 formed in the upper block 62. Therefore, a perfect circular hole is formed in the photosensitive film F inserted in the gap 68 between the upper block 62 and the lower block 63.

Since the solenoid 66 is fixed inside the drum 1, it is necessary to supply electric power for driving the solenoid 66 from the outside. For this reason, as shown in FIG. 2, the terminal 74 provided at the tip of the protrusion 70 fixed to the frame 9 is connected to the rotating shaft 90 of the drum 1 and the drum 1.
The terminal holder 72 fixed to the side surface 1b of the terminal holder 72.
Electric power can be supplied to the solenoid 66 fixed to the inside 1 of the drum via the second 2. As shown in FIG. 10, the terminal holder 72 and the solenoid 66 are connected by a cable 67.

While only one punch means 60 has been described above, the other punch means 61 is
Compared to 0, the shape of the punch pin 66b (the cross section is an ellipse)
However, since the configuration is the same except for the difference, the description is omitted. Further, the power supply to the solenoid of the punch means 61, similarly to the case of the punch means 60, is fixed to the terminal 76 and the rotary shaft 90 is fixed to the projecting portion 71 which is fixed to the frame 9, as shown in FIG. 2 This is performed via the terminal holder 73. Next, the operation of the embodiment performed as described above will be described with reference to FIGS.
Explanation will be made based on the block diagram and the flowchart shown in FIG.

(Control Flow) FIG. 12 is a control block diagram of the color scanner in the embodiment according to the present invention. This color scanner is based on color-separated image data of, for example, four colors (Y, M, C, K) stored in an image memory 107 and sequentially applies color-separated images to four photosensitive films F mounted on the drum 1. This operation is
The control program is mainly controlled by the CPU 100, and the control program is stored in the ROM 101 and controlled by the control program shown in FIG.

First, in step S1, the photosensitive film F is mounted on the drum 1, and then in step S3, Y (yellow) stored in the image memory 107 is set.
The photosensitive film F is exposed based on the color-separated image data described above to form a Y-color separated image. Then, step S
5, the photosensitive film F mounted on the drum 1
Two holes are made at the tip of the drum by punch means 60 and 61, and then, in step S7, the photosensitive film F is peeled and discharged from the drum 1. Subsequently, in step S9, it is determined whether or not all the color separation images have been formed. If not, steps S1 to S7 are repeated again, and the next color separation image data (for example, M (magenta))
To form a color separation image based on

The photosensitive film mounting step in step S1 is performed according to the control flowchart shown in FIG. First, in step S10, the operation panel 10
When the wrapping switch 105 provided on 4 is operated,
In step S11, the motor 11 is driven to rotate forward, thereby rotating the first eccentric cam 30 to open the tip pressing means 10. That is, as shown in FIG. 4, the eccentric cam 30 rotates in the direction of the arrow, and lifts the tip holding member 10b of the tip holding means 10 to open the entrance side 10g. Subsequently, in step S12, the supply roller 2b is rotated by driving the transport motor 110 (FIG. 12) to transport the photosensitive film F. In step S13, the leading end of the photosensitive film F reaches the origin position A. After a certain period of time has elapsed in step S14 after the detection by the sensor 4, the conveyance of the photosensitive film F by the supply roller 2b is stopped in step S15. In this state, the leading end of the photosensitive film F is located at the gap 68 between the upper and lower blocks of the leading end pressing means 10 and the punch means 60 and 61 (FIG. 10).
It is located in. Then, in step S16, the tip of the photosensitive film F is sandwiched and fixed to the drum 1 by the tip pressing means 10. That is, as shown in FIG. 3, the tip holding member 10d of the tip holding means 10 closes the entrance side 10g and sandwiches the tip of the photosensitive film F.

Next, in step S17, the drum 1
Is rotated, and the tip pressing means 10 is rotated by the squeegee roller 40.
a, the solenoid 40s is excited in step S18, so that the squeegee roller 4
Oa is brought into contact with the peripheral surface of the drum 1 to prevent the photosensitive film F from floating. Then, in step S19, when the rotation amount of the drum 1 reaches a predetermined amount (when the length of the photosensitive film F passing through the cutter 5 becomes a specified length), the rotation of the drum 1 is stopped. In step S20, the cutter motor 111 is driven to cut the photosensitive film F.

Further, in step S21, the photosensitive film F
The drum 1 is rotated until the trailing end of the photosensitive film F reaches the position of the trailing end pressing means 20, and then the trailing end of the photosensitive film F is fixed by the trailing end pressing means 20 in step S22.
That is, as shown in FIGS. 5 to 8, the triangular cam 20d is rotated by the driving of the motor 11, and the rear end holding member 20a is rotated.
And hold down while pulling the rear end of the photosensitive film F. After that, the solenoid 40S is demagnetized to remove the squeegee roller 40a.
Is separated from the drum 1. Through the above steps, the unexposed photosensitive film F can be mounted on the drum 1.

The image forming step of step S3 in FIG. 13 is performed according to the control flowchart shown in FIG. First, in step S30, the drum 1 is rotated at a constant speed by the pulse motor 6, and in step S31
Then, the color separation image is exposed on the photosensitive film F based on the Y (yellow) color separation image data. This image exposure
As shown in FIG. 12, the color separation image data stored in the image memory 107 is converted into a halftone signal by a halftone generation circuit 108, and the light emission of the light source 3a is controlled based on the halftone signal, thereby exposing the light. A color separation image is formed on the film F. The formation position of the color separation image is always formed at the same position with respect to the drum 1 for each color separation image.
Then, in step S32, the rotation of the drum 1 is stopped.

The punching step of step S5 in FIG. 13 is performed based on the flowchart shown in FIG. First, after the image exposure is completed, in step S50, when the ejection switch 106 on the operation panel 104 is operated, in step S51,
The rotation of the drum 1 is controlled so that the and 61 are located at positions facing the waste receptacle 80 at the lower part of the drum 1, and in this state, a punching operation is performed in step S 52. Then, two holes, a perfect circle and an oval, are formed at the tip of the photosensitive film F, and the chips of the photosensitive film F fall into the chip receiver 80.

Further, the peeling and discharging step of step S7 in FIG. 13 is performed based on the flowchart shown in FIG. First, in step S70, the rotation of the drum 1 is controlled so that the tip pressing means 10 faces the peeling claw 45, that is, the position B shown in FIG. 1, and in step S71, the solenoids 40S and 45B are excited. Then, the squeegee roller 40a and the peeling claw 45 are brought into close contact with the drum 1. Then, in step S72, the eccentric cam 3 is rotated by rotating the motor 11 in the reverse direction.
1 to release the leading end pressing operation of the photosensitive film F by the leading end pressing means 10, and by rubbing the photosensitive film F with the squeegee roller 40 a to ease the close contact state of the photosensitive film F, The tip of the photosensitive film F is placed. Then, Step S73
, The photosensitive film F on which the color separation image is formed is discharged by rotating the drum 1 and the discharge roller 50.

As described above, when the color separation image data of four colors is prepared, steps S1 to S7 are performed.
Is repeated four times to obtain four photosensitive films F on which Y, M, C and K color separation images are formed.
Two holes are formed in each photosensitive film F. Here, in each photosensitive film F, the relative positions of the two holes and the color separation image are the same. Therefore, by performing overprinting based on the holes, no color shift occurs.

In the above embodiment, the holes are formed in the photosensitive film F after the image forming operation (steps S1 to S3 in FIG. 13). This is for the following reason. That is, when the rotation of the drum 1 is accelerated by the image exposure operation, an inertial force acts on the photosensitive film F, and the mounting position of the photosensitive film F may be slightly shifted with respect to the drum 1. This is because when opened, the relative positions of the hole and the color-separated image often differ for each color-separated plate. Therefore, it is preferable to make a hole after the end of the image forming operation in which the relative position between the drum 1 and the photosensitive film F is almost the same as that at the time of image formation.

However, if the photosensitive film is pressed against the drum 1 with a force that overcomes this inertial force, the punching operation may be performed before the image recording operation. That is, steps S51 and S52 of the control flow shown in FIG.
May be changed after step S1 in FIG. Further, the punching operation may be performed before the image recording operation, and the punching pin 66a may be inserted into the photosensitive film F (that is, the solenoid 66 is excited) during the image exposing operation. That is, FIG.
The control flow may be changed as shown in FIG. This control flow is the same as the control flow shown in FIG. 13 except that steps S3 and S5 are changed from step S90 to S94.
After being attached to the punching device 6, in step S90,
The solenoids 0 and 61 are excited, and the punch pins 66a are inserted into the photosensitive film F. In this state, in step S91, the rotation of the drum 1 is started, and
At 92, a color separation image, for example, yellow, is formed on the photosensitive film F. Thereafter, the rotation of the drum 1 is stopped in step S93, and then the excitation of the solenoid 66 is released in step S94. Thus, steps S90 to S9
During the period between 4, the punch pins 6
6a is inserted. Thereafter, in step S7, the photosensitive film F is discharged. Therefore, in this case, during rotation (during acceleration) of the drum 1 for image exposure, the punch pin 66
Since the position of the photosensitive film F is fixed by a, the photosensitive film F does not shift during exposure recording.

[0042]

As described above, according to the present invention, the photosensitive film is formed by piercing the film by operating the punch means while the photosensitive film is mounted on the drum type film holding portion. Since the relative positional relationship between the formed color separation image and the hole always coincides, furthermore, if a hole is opened after the color separation image is formed, the relative position between the color separation image and the hole more accurately matches, By performing overprinting using these holes as a reference, there is no color shift in printed matter after multicolor overprinting, so that a clear and beautiful image can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing a color scanner according to one embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view showing the closed state of the tip pressing means.

FIG. 4 is a side view showing the open state of the tip pressing means.

FIG. 5 is a side view showing an operation state of the rear end pressing means.

FIG. 6 is a side view showing an operation state of the rear end pressing means.

FIG. 7 is a side view showing an operation state of the rear end pressing means.

FIG. 8 is a side view showing an operation state of the rear end pressing means.

FIG. 9 is a diagram showing an operation locus of a rear end pressing means.

FIG. 10 is a side view of the punch means when the solenoid is demagnetized.

FIG. 11 is a side view of the punch means when the solenoid is excited.

FIG. 12 is a control operation block diagram of the color scanner in the embodiment.

FIG. 13 is a flowchart of a control program stored in a ROM 101.

FIG. 14 is a flowchart of a program for controlling a photosensitive film mounting step in step (S1).

FIG. 15 is a flowchart of a program for controlling an image forming process in step (S3).

FIG. 16 is a flowchart of a program for controlling a punching step in step (S5).

FIG. 17 is a flowchart of a program for controlling a peeling step in step (S7).

FIG. 18 is a flowchart of a program for controlling another example in the punching process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film holding part (drum) 3a Light source 60 Punch means 61 Punch means 66 Solenoid 100 CPU 101 ROM F Photosensitive film

Continuation of front page (56) References JP-A-63-104057 (JP, A) JP-A-2-71269 (JP, A) JP-A-58-55295 (JP, A) JP-A-5-281750 (JP) , A) Microfilm (JP, U) that photographed the contents of the specification and drawings attached to the application for Japanese Utility Model Application No. Hei 3-24865 (Japanese Utility Model Application No. Hei 4-114055) (58) Field surveyed (Int. . ^6, DB name) G03F 1/00 G03F 3/08 H04N 1/08

Claims (2)

(57) [Claims] 1. A color separation plate forming apparatus for forming a color separation image on a photosensitive film mounted on a drum type film holding part based on a plurality of color separation image data representing a color image, wherein the drum type film holding part Image forming means for forming a color-separated image based on the color-separated image data on the photosensitive film mounted on the photosensitive film; and the photosensitive film held by the drum-type film while being mounted on the drum-type film holding unit . A color separation plate forming apparatus, comprising: a punch means for making a hole in a photosensitive film. 2. The color separation plate according to claim 1, wherein said color separation plate forming apparatus further comprises control means for operating said punch means after the color separation image is formed by said image forming means. Forming equipment.