JPH0968809A - Photocomposing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a distance between a feeding and ejecting base and an original film to be attracted constant and to smoothly attract the original film by advancing and retreating a housing stage to/from an optional position with respect to the feeding and ejecting base. SOLUTION: A supply stage and the housing stage 14 for an original film are provided on the side of a printing stage, and plural original films are laminated and housed in printing order in a film cassette 21 on the stage 14. By attracting the original on the stage 14 to the back surface of the feeding and ejecting base 25 and moving the base 25 to the supply stage, the original is transferred to the supply stage. The film cassette 21 on the stage 14 is fixed on a supporting bar 63 through a screw 61. By driving a pulse motor 77, a pulley 69 and a nut 67 are rotated through a timing belt, and the stage 14 (film cassette 21) is advanced to and retreated from the optional position by the supporting bar 63 fixed on a supporting plate 65 through a ball screw 66 erected on the supporting plate 65.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing plate having a storage stage and a supply stage.

[0002]

2. Description of the Related Art Generally, a film cassette is provided on an accommodation stage, and a maximum of one film cassette is provided in the film cassette.
It is well known that an engraving machine that stores 00 original films, takes out the original films one by one, supplies them to a supply stage, moves them from there to a printing stage, and prints the originals on a photosensitive material on the printing stage Has been. In this type, the storage stage (film cassette) is advanced toward the feeding / discharging table, the original film in the film cassette is adsorbed to the back surface of the feeding / discharging table, and the feeding / discharging table is retracted,
It is general that the feeding / discharging table is transferred onto the feeding stage, and thereafter, the feeding stage is advanced toward the feeding / discharging table and the original film on the back surface of the feeding / discharging table is transferred onto the feeding stage. .

[0003]

However, in the conventional plate-making machine, the storage stage and the supply stage are moved forward,
There is a problem in that they cannot be stopped at arbitrary positions because the distance to be retracted is fixed in design. For example, with respect to the storage stage, if it cannot be stopped at an arbitrary position, when the remaining amount of the original film in the film cassette decreases, the distance between the feeding / discharging table and the original film to be adsorbed becomes relatively large. Since it becomes large, there is a problem that it cannot be adsorbed well.

Therefore, an object of the present invention is to solve the problems of the above-mentioned conventional techniques and provide a platemaking machine capable of advancing and retracting the accommodation stage and / or the supply stage to an arbitrary position. To do.

[0005]

According to a first aspect of the present invention, an original film stored in a storage stage is adsorbed on a back surface of a feeding / discharging table, and the feeding / discharging table is transferred onto the feeding stage. In the plate-making machine for transferring the original film onto the supply stage, the accommodation stage can be moved forward and backward with respect to an arbitrary position with respect to the supply / discharge table.

According to a second aspect of the present invention, in the first aspect, a film cassette is provided on the storage stage, and a sensor for detecting the remaining amount of the original film in the film cassette is provided. The forward and backward positions of the accommodation stage are determined according to the remaining amount.

According to these inventions, the storage stage is
Since it can be moved forward and backward to an arbitrary position, even if the remaining amount of the original film stored in the storage stage is reduced, the storage stage can be moved forward by that amount, so that it is adsorbed to the supply / discharge table. It is possible to maintain a constant distance from the original film, and the original film can be smoothly sucked.

According to a third aspect of the present invention, there is provided a storage stage and a supply stage, the original film stored in the storage stage is adsorbed on the back surface of the supply / discharge table, and the supply / discharge table is placed on the supply stage. , The original film is transferred to the supply stage, the transferred original film is adsorbed to the original frame and moved to the printing stage, and the original is printed on the photosensitive material on the printing stage. In the machine, the feeding stage can be moved forward and backward with respect to an arbitrary position with respect to the document frame and / or the feeding / discharging table.

According to this, the supply stage can be moved forward and backward with respect to an arbitrary position with respect to the document frame and / or the feeding / discharging table, so that the supply stage is rotated, for example, as described in detail later. When the mechanism is adopted or the mechanism for pulling out the tray on the supply stage is adopted, the supply stage can be made to stand by at an arbitrary position as required.

According to a fourth aspect of the present invention, in any one of the first to third aspects, a plurality of ball screws are provided upright on a support plate of the accommodation stage or the supply stage, and the ball screws are provided. , Each nut is screwed together, the case of this nut is fixed to the fixed part, and each nut is
A pulley is concentrically fixed, a timing belt is wound between these pulleys, the timing belt is wound around a drive pulley, and an output shaft of a pulse motor is connected to the drive pulley.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings. First, the overall configuration of the plate-making machine will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes a machine frame, in which a board plate 2 is arranged in a tilted state, and the board 2 is tilted by an air cylinder (not shown) or the like arranged on the back surface. It can be moved back and forth. On the front surface of the board 2, a frame 3 inclined at substantially the same inclination angle as the board 2 is arranged separately from the board 2, and the frames 3 are arranged on the upper and lower sides of the machine frame 1 respectively in the horizontal direction. The rail 4 is movable in the lateral direction with respect to the board plate 2.

A guide rail 5 is vertically arranged on the frame 3, and a slide frame 6 is mounted on the guide rail 5 so as to be vertically movable. In this slide frame 6,
A document frame 10 having a transparent glass and a lamp 8 are mounted. The lamp 8 is rotatably supported by the frame 3 and can be opened and closed. The opening and closing of the lamp 8 can be performed by maintenance of a light source lamp (not shown) housed in the lamp 8 or by visually confirming the degree of vacuum suction of the original film to the board plate 2 described later. It is designed to be able to do so.

The board plate 2 is used as a holder (hereinafter, referred to as a "printing stage") 12 for a photosensitive material (not shown), and a left side portion of the printing stage 12 is an original film as shown in FIG. A supply stage 13 and a document film storage stage 14 are provided. A film cassette 21 is disposed on the storage stage 14, and, for example, a maximum of 100 original films are stacked and stored in the film cassette 21 in the printing order. 22
Denotes a handle of the film cassette 21. The original film used here is a film made of a transparent synthetic resin having a thickness of about 0.18 mm. This original film includes an original having a thickness of about 0.10 mm, a tape or the like. Affixed.

Above the film cassette 21, there is provided a feed / discharge table 25 which moves between the accommodation stage 14 and the supply stage 13. A plurality of suction heads 27 are provided on the back surface of the supply / discharge table 25.
When only one original film in the film cassette 21 is adsorbed and this one original film is adsorbed, the feeding / discharging table 25
Moves above the supply stage 13 and moves to the supply stage 1
The one original film is transferred to No. 3. The transfer is performed by vacuum suction on the supply stage 13.

[0015] back surface of the construction supply stage 13 of the supply stage, as shown in FIG. 2, and 7, through the supporting plate 41, a circular rack gear 43 is fixed, the pinion gear 45 to the rack gear 43 is It is meshed. As shown in FIG. 5, the pinion gear 45 is fixed to the output shaft of the pulse motor 46 fixed to the fixing portion 48 via the speed reducer 47. Therefore, in this embodiment, the pulse motor 46 is driven. Then, the supply stage 13 is rotated via the gears 45 and 43. A locking member 44 having a recess is fixed to the rack gear 43, and the tip of the cylinder rod of the cylinder 49 fixed to the fixing portion 48 can be fitted into the recess (not shown) of the locking member 44. It has become.

The supply stage 13 is, for example, 180 °
It will rotate and stop, but after this stops, cylinder 4
When the tip of the cylinder rod 9 is fitted into the recess of the locking member 44, the fine movement of the supply stage 13 due to the backlash between the gears 45 and 43 is almost surely prevented.

As shown in FIG. 5, three ball screws 51 are erected on the support plate 41 at equal intervals in the circumferential direction. The ball screws 51 are provided with nuts as shown in FIG. The nuts 500 are screwed together, and the case of the nut 500 is fixed to the fixing portion 48. The nut 500 is rotatably held by the case. Pulleys 55 are fixed concentrically to the respective nuts 500, and a timing belt 56 is wound between the pulleys 55 as shown in FIG. This timing belt 56 is an auxiliary pulley 57
Is wound around a driving pulley 58, on which an output shaft of a pulse motor 59 is fixed. Therefore, in this embodiment, the pulse motor 59
Is driven, the pulley 55 and the nut rotate via the timing belt 56, and the supply stage 13 advances or retreats via the ball screw 51. Incidentally, 6
0 is a pair of guide posts.

Operation of Supply Stage According to this embodiment, since the supply stage 13 is driven by using the pulse motor 59, the pulse motor 59 is used.
It is possible to move forward or backward to an arbitrary position by controlling the number of pulses given to.

As will be described later, for example, a mechanism for pulling out the trays 31 to 34 (see FIG. 8) is adopted so that the supply stage 13 can be moved forward or backward to an arbitrary position. This is to make the supply stage 13 stand by at an arbitrary position so that any one of the drawn trays 31 to 34 can be transferred onto the supply stage 13 without a step. The advance amount of the supply stage 13 is controlled differently depending on which tray 31 to 34 is pulled out, but in any case, the supply stage 13 is moved to a position corresponding to the back surface of any tray 31 to 34 to be pulled out. Will receive advancement and control.

According to this embodiment, when the original film is supplied to the printing stage 12 during the printing of the original film, the original film may be rotated by, for example, 180 ° on the supply stage 13 and then supplied.

At this time, the supply stage 13 is rotated once by advancing it to a predetermined position, that is, by avoiding an extra portion which obstructs the rotation by advancing, and then driving the pulse motor 46. Even in this case, it is necessary to move the supply stage 13 forward to a predetermined position once. In such a case, in the present embodiment, the pulse motor 59 is driven to move the supply stage 13 to an arbitrary position. It can be advanced to a position and can be reliably stopped at that position.

Structure of Storage Stage Referring to FIGS. 2 and 8, a film cassette 21 is located on the storage stage 14, and the film cassette 21
Are fixed to the support rod 63 via, for example, screws 61. The support rod 63 is fixed to a support plate 65, and three ball screws 66 are erected on the support plate 65 at equal intervals in the circumferential direction. Nuts 67 are respectively screwed into the ball screws 66, and the case of the nut 67 is fixed to a fixing portion 68. As shown in FIG. 8, pulleys 69 are fixed concentrically to the respective nuts 67, and a timing belt 71 is wound between the pulleys 69 as shown in FIG. The timing belt 71 is wound around an auxiliary pulley 73 and then wound around a drive pulley 75, and an output shaft of a pulse motor 77 fixed to a fixing portion 68 is fixed to the drive pulley 75.

Therefore, according to this embodiment, when the pulse motor 77 is driven, the pulley 69 and the nut 67 rotate via the timing belt 71, and the film cassette 21 moves through the ball screw 66. Move forward or backward. Reference numerals 78 and 78 are a pair of guide posts.

Operation of Storage Stage According to this embodiment, since the storage stage 14 (film cassette 21) is driven by using the pulse motor 77, by controlling the number of pulses given to it,
It is possible to move forward or backward to any position.

The film cassette 21 usually contains 100
About 10 sheets of original film are stacked and accommodated. When the original film is full and when the remaining amount of the original film is low, referring to FIG. It will need to be adjusted. As shown in FIG. 8, the remaining amount of the original film is detected by a sensor 600 provided on the upper surface of the back surface of the supply / discharge stand 25.

This sensor 600 has a detection section 601 for the remaining amount of the original film, and this detection section 601 is the shaft 6
03 is loosely fitted and is urged toward the original film side by a spring 605. Then, the pulse motor 7
When 7 is driven to move the film cassette 21 forward,
Referring to FIG. 8, the leading end of the detecting portion 601 of the sensor 600 always hits the original film in the process of advancing.

In this embodiment, the contact of the detector 601 is electrically sensed, and the drive of the pulse motor 77, that is, the drive of the film cassette 21 is stopped based on the sensing result. According to this, even if the remaining amount of the original film becomes small, the surface of the original film to be sucked and the suction head 27
Is maintained substantially constant, so that the original film is smoothly sucked. Incidentally, conventionally, the amount of advance of the film cassette 21 is designed to be constant, and
However, there is a limit to this measure. If the remaining amount of the original film becomes small, smooth suction cannot be performed. According to this embodiment, such a disadvantage can be sufficiently solved. In this embodiment as well, it is desirable to devise the length of the suction pad 27 to have elasticity as in the conventional case.

Structure of Tray The film cassette 21 is attached to the storage stage 14 described above.
In addition to the above, a plurality of (for example, four) trays 31 to 34 are arranged. Each of the trays 31 to 34 is accommodated below the film cassette 21, and each tray 31
Both side portions of ~ 34 are supported and guided by guide members 35a ~ 35c provided in three rows below the film cassette 21. The guide members 35a to 35c are each formed of a pair of rollers, and each tray 3 is provided between the pair of rollers.
The measuring edges 1 to 34 are sandwiched. Each tray 31-34
Can be moved between the accommodation stage 14 and the supply stage 13. In this embodiment, each tray is moved by using the above-mentioned feeding / discharging table (= transfer means) 25.

That is, as shown in FIG.
And as shown in FIG. 3, the ten cylinders 37a to 37a
j are fixed in a horizontal row. 10 cylinders 37a
When the piston rods of the outermost cylinders 37a and 37j are extended, the tip of the rod is
Caught on the locking portion 34a of the tray 34 at the lowest position,
When the piston rods of the inner cylinders 37b and 37i extend, the tips of the rods are caught by the locking portions 33a of the tray 33 at the second position from the bottom, and the piston rods of the inner cylinders 37c and 37h are When extended, the tip of the rod is hooked on the locking portion 32a of the tray 32 at the second position from the top, and when the piston rods of the cylinders 37d and 37g inside extend, the tip of the rod is moved to the lowest position. It is configured to be hooked on the locking portion 31a of the tray 31 at the upper position. According to this, for example, the outermost cylinders 37a, 37
j with the tip of the piston rod
When the supply / discharge stand 25 is raised in a state where the tray 34 is hooked on the tray a, the lowermost tray 34 is pulled out from below the accommodation stage 14 onto the supply stage 13.

In this embodiment, when the tray 34 is pulled out, the supply stage 13 is operated by the pulse motor 5 as described in the above section "Operation of the supply stage".
It advances to a position for receiving the tray 34 via an advance / reverse mechanism including 9.

When the tray 34 is pulled out onto the supply stage 13, guide members 35a to 35c are provided in three rows below the storage stage 14 and guides provided on both side edges of the supply stage 13. It is pulled out while being supported and guided through the member 36. This guide member 36
Can be retracted from the surface of the supply stage 13, and the tray 34 pulled out on the supply stage 13 is
When fixing on the supply stage 13, the guide member 3
Numeral 6 is set back from the surface of the supply stage 13.

When the tray 34 pulled out onto the supply stage 13 is fixed to the supply stage 13, the piston rods of the innermost cylinders 37e to 37f are extended, and the tip of the rod extends to the supply stage 13. The tray 34 is pressed against it. A hole 38 (FIG. 3) having a diameter of 8 mm is formed in the center of both sides of each of the trays 31 to 34, and when fixing each of the trays 31 to 34 to the supply stage 13, as described above, the cylinders 37e to 37f have the same shape. When the trays 31 to 34 are pressed by the tip of the piston rod, the pins 39 (FIG. 3) provided on the supply stage 13 are fitted into the holes 38 of the trays 31 to 34, whereby the tray 31
~ 34 is fixed.

In this embodiment, the pin 39 has a stepped tip as shown in FIG. 4, the diameter of the thin portion d of the tip is about 6 mm, and the diameter of the thick portion D at the base thereof. Is formed to have a thickness of about 8 mm. The pin 39 can be freely projected from the surface of the supply stage 13 by using a cylinder (not shown) or the like. When fixing the trays 31 to 34 to the supply stage 13 as described above, the pin 3
9 is projected and the thick portion D is fitted into the holes 38 of the trays 31 to 34, and as described later, when the original film is directly adsorbed to the supply stage 13, the pin 39 is retracted and the thin portion d is the original. It is adapted to fit into a hole (not shown) in the film. 4a shows a pin 39 having a thick circular portion, and FIG. 4b shows a hexagonal pin 39 having a thick portion, which are arranged on the left and right of the supply stage 13, respectively.

Original films are adsorbed and fixed on the surfaces of the trays 31 to 34. This original film is adsorbed and fixed on the surface of each of the trays 31 to 34 in advance, or the original film that has been baked once in the later-described plate making operation is adsorbed and stored on the surface of one of the trays 31 to 34. It may be used repeatedly.

Tray 34 holding and holding the original film
Is pulled out onto the supply stage 13 as described above, the details of which will be described later.
Arrives, the tray 34 advances toward the original frame 10, the original film is attracted to the original frame 10, and the original film is transferred. The document frame 10 moves to a printing stage 12 in accordance with the movement of the frame 3, where printing is performed. On the other hand, when the original film used for printing is to be used again, the tray 34 is kept above the supply stage 13, and after the printing is completed, the original film is discharged to the tray 34 at the supply stage 13, and May be stored in the storage stage 14. According to this, the original film can be used repeatedly. In order to store the tray 34 on the storage stage 14, an operation opposite to the operation for pulling out the tray 34 from the storage stage 14 may be performed.

Printing / Discharging Operation Next, the operation of the plate-making machine shown in FIG. 1 will be described. First, a film cassette 21 containing a predetermined number of original films
Is set on the accommodation stage 14. When the plate making machine is operated, the original film in the film cassette 21 is adsorbed on the back surface of the feeding / discharging table 25 through the suction head 27, and the feeding / discharging table 25 that has sucked this moves to the supply stage 13. , Transfer the manuscript film there. After the original film is transferred, the feeding / discharging table 25 is returned to its original position, that is, on the accommodation stage 14.

Next, the document frame 10 moves to the front of the supply stage 13 and stops while sliding vertically and horizontally in the figure, and at the same time, the inclined supply stage 13 moves.
By driving the above-mentioned pulse motor 46, it moves forward and approaches the original frame 10, and the original film is adsorbed in the adsorption groove provided in the original frame 10. Thereafter, the supply stage 13 retreats and returns to the original position.

On the other hand, the photosensitive material is fixed on the printing stage 12 in advance. Then, the frame 3 moves toward the printing stage 12, and the original frame 10 moves on the frame 3
The document frame 10 carrying the document film reaches the front surface of the photosensitive material. Then, the printing stage 12 moves forward and approaches the document frame 10, the pressure between the photosensitive material and the document frame 10 is reduced, and the document film comes into close contact with the photosensitive material. By irradiating light from the light source in the lamp 8 in this state, the original on the original film is printed on the photosensitive material. When printing is completed, the reduced pressure state between the photosensitive material and the document frame 10 is released, and the printing stage 12 moves backward.

Next, the operation of discharging the original document is started. At the time of this discharging operation, the feeding / discharging table 25 stands by above the supply stage 13, and the frame 3 moves so that the document frame 10 reaches above the waiting feeding / discharging table 25. The frame 3 is provided with a document film discharge pad (not shown) for sucking the document film adsorbed on the document frame 10, and the document film discharge pad extends forward to suck the document film. In this state, at the same time as the original film discharge pad is retracted, air is sent out from the suction groove on the glass edge of the original frame 10 to which the original film has been sucked.

In this way, the manuscript film is supplied to and discharged from the feed table 25.
Then, when the suction of the original film discharge pad is released, the original film is locked by the receiving portion 15 of the feeding / discharging table 25. Thus, the printing process is completed.

Operation of Tray According to the above operation, the original film accommodated in the film cassette 21 is sequentially discharged out of the plate-making machine after the printing is completed. Therefore, according to this embodiment, by using the trays 31 to 34, the original film which has been printed is discharged to one of the trays 31 to 34, stored, and stored as needed. Kano Tray 31
.. to 34 are pulled out onto the supply stage 13 as described above, the original film adsorbed on the trays 31 to 34 is adsorbed to the original frame 10 and moved to the printing stage 12, where the photosensitive material is printed. Therefore, the original film can be used repeatedly.

Although the present invention has been described based on one embodiment, it is apparent that the present invention is not limited to this. For example, the means for advancing the accommodation stage 14 and the supply stage 13 to and from the arbitrary position is not limited to the above-mentioned means, and may be advanced or retracted by other means. In the invention, the accommodation stage 14 and the supply stage 1
It is important that 3 can be moved forward and backward to any position.

[0043]

As described above, according to the present invention, the accommodation stage and / or the supply stage can be moved forward and backward to any position.

[Brief description of drawings]

FIG. 1 is an external perspective view showing the overall configuration of a printing plate machine.

FIG. 2 is a cross-sectional view of the original film supply / discharge unit of FIG.

FIG. 3 is a front view of a document film supply / discharge unit of FIG. 1;

4A and 4B are diagrams of pins provided on a supply stage, respectively.

FIG. 5 is a back view of the supply stage.

FIG. 6 is a back view of the storage stage.

FIG. 7 is an enlarged sectional view showing a supply stage.

FIG. 8 is an enlarged cross-sectional view showing a storage stage.

[Explanation of symbols]

 10 Document Frame 13 Supply Stage 14 Storage Stage 21 Film Cassette 25 Feed / Discharge Table 31-34 Tray

Claims (4)

[Claims] 1. An intaglio machine for adsorbing a manuscript film stored in a housing stage onto a back surface of a feeding / discharging table, transferring the feeding / discharging table to a supply stage, and transferring the manuscript film to the supply stage. 2. The plate-making machine according to claim 1, wherein the housing stage can be moved forward and backward with respect to an arbitrary position with respect to the feeding / discharging table. 2. A film cassette is provided on the accommodating stage, a sensor is provided for detecting the remaining amount of the original film in the film cassette, and the advancing and retracting of the accommodating stage is performed according to the remaining amount detected by the sensor. The plate-making machine according to claim 1, wherein the position is determined. 3. Having a storage stage and a supply stage,
The original film stored in the storage stage is attracted to the back surface of the feeding / discharging table, the feeding / discharging table is transferred to the supply stage, the original film is transferred to the supply stage, and the transferred original film is transferred. In a plate engraving machine that sucks the document onto the document frame and moves it to the printing stage, and prints the document on the photosensitive material on the printing stage. A typesetting machine characterized by allowing the stage to move forward and backward. 4. A plurality of ball screws are erected on a support plate of the accommodation stage or the supply stage, nuts are respectively screwed onto the ball screws, and cases of the nuts are fixed to fixing parts, respectively. Concentricly fix the pulley to the nut of
A timing belt is wound between these pulleys, this timing belt is wound around a drive pulley, and a pulse motor is connected to this drive pulley. Machine.