JP2511281Y2 - Plate making machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a small plate making machine for producing a printing master for reciprocating postcards, etc., and in particular, achieves both flatness of the master paper at the time of exposure and smooth feeding / discharging characteristics of the master paper. The present invention relates to a miniaturized plate making machine having an exposure table structure.

[0002]

As is well known, a plate making machine is used for producing an image master used in a printing machine. In the conventional plate making machine, a master paper is provided on both sides of an exposure stage for exposing a document image. A supply side conveyance system and a discharge side conveyance system for conveyance are provided horizontally adjacent to each other, and after charging the master paper by the supply side conveyance system, the master paper is supplied to the exposure stage. Then, the master paper on which the original image is formed as a latent image on the exposure stage is sent to a discharge-side transport system that visualizes the original image, developed and fixed, and then taken out to a discharge tray.

[0003]

Therefore, in the conventional plate-making machine, the supply side conveyance system and the discharge side conveyance system for conveying the master paper are horizontally adjacent to each other on both sides of the exposure stage for exposing the original image. Since it is provided, the horizontal dimension of the plate making machine itself tends to be large, and especially in the field of light printing using small size masters such as reciprocating postcards, the plate making machine installation area is large compared to the printing machine. Therefore, downsizing of the plate making machine is required. From the standpoint of miniaturization of such a plate making machine, the present inventors have provided a substantially horizontal supply side transport system for feeding the master paper to the exposure stage on the upper part of the plate making machine, and the original image on the exposure stage. A lamp house for projecting the image is provided, and an exposure stage with a feed belt that can be tilted about a tilt axis on the side opposite to the supply side transport system is provided on the exposure stage, and the exposed master paper is transferred from this exposure stage. We are developing a small plate-making machine in which the discharge side transport system that picks up and develops and fixes the latent image is arranged below the supply side transport system in an inclined state. That is, according to the plate making machine of the same structure disclosed in the specification and the drawings of Japanese Patent Application No. 3-267320 (Japanese Patent Application Laid-Open No. 5-80593), one end of the feed side conveying system provided at the upper part of the plate making machine body is tilted. After the master plate is exposed on the exposure plate, the master paper is developed by the discharge side transport system located below the supply side transport system with the endless feed belt attached to the exposure plate. Since fixing can be performed, a small plate making machine having a small installation area can be obtained. However, in the miniaturized plate making machine under development, it is difficult to achieve both the flatness of the master paper at the time of exposure and the smooth supply / discharge characteristics of the master paper. In other words, when the master paper is exposed on the feed belt, it is difficult to maintain the flatness of the master paper to obtain a high-resolution original image, and conversely, when the master paper is adsorbed on the exposure plate having high flatness, It is difficult to peel off the master paper from the exposure plate, and there is a problem that the master paper cannot be smoothly supplied to and discharged from the exposure table. The object of the present invention is to solve the above-mentioned demand for downsizing of a conventional plate making machine.
An object of the present invention is to obtain a plate making machine which has a small overall size and which can both solve the problems of feeding and discharging the master paper to and from the exposure table and the problems of exposure on the exposure table.

[0004]

In order to achieve this object, the present invention is to charge a cut master paper, send it to an exposure stage, expose a document image on the master paper, and then expose the same latent image. In the plate making machine for developing and fixing the image, a substantially horizontal supply side conveying system for feeding the master paper to the exposure stage is provided on the upper part of the plate making machine, and a lamp house for projecting a document image is arranged on the upper part of the exposure stage. The exposure stage is provided with an exposure plate that can be tilted about a tilt axis on the side opposite to the supply side transport system, and an endless feed belt that feeds and ejects master paper to and from the exposure plate is attached to the exposure plate. It is provided in a state of being enclosed, and when the exposure plate is in the tilted position, the discharge side transport system that takes the exposed master paper from the exposure plate and develops and fixes the latent image is tilted below the supply side transport system. Shi State, a vacuum box for adsorbing the master sheet to the exposure plate is provided under the exposure plate, and a rotating arm having a movable pulley for hanging the endless feed belt on a portion near the movable end of the exposure plate. The present invention proposes a plate making machine having an exposure base which is pivotally supported and which has an upper limit stopper and a lower limit stopper capable of restricting the position of the rotary arm and arranged in the movement trajectory of the rotary arm.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. Figure 1 is an overall sectional view of a plate making machine which has been subjected to the present invention, inside one side of the plate making machine body 1 Yes accommodates the rolled master X ₁ wound on the bobbin, the roll-like master X ₁ is A supply side transport system including a pull-out roller 2, a relay roller 3, a paper feed roller 4, and a pair of primary transport rollers 5 arranged in a substantially horizontal direction is arranged. That is, the supply side transport system is provided with a cutter 6 between the drawing roller 2 and the relay roller 3, and the cutter 6 cuts the roll-shaped master X ₁ drawn by the drawing roller 2 into a prescribed length. . Above the roll-shaped master X ₁ , the paper feed roller 4 is provided.
A manual paper feeding table 7 is provided which is lowered toward the sheet feeding means, and the cut master X ₂ is supplied to the paper feeding roller 4 from the manual paper feeding table 7. Although illustration is omitted, a master detector for detecting the master paper X is positioned immediately before the paper feed roller 4, and when the cut master X ₂ is detected by this master detector, the rotational movement of the pull-out roller 2 is performed. Therefore, the feeding of the roll-shaped master X ₁ is prohibited in the same state. Since the charger 8 is arranged between the primary transport rollers 5, the surface of the master paper X is charged while passing between the primary transport rollers 5.

The charged master paper X is supplied to an exposure stage 9 which will be described in detail later with reference to FIGS. 2 to 7.
A working hole 10 and an exposure window 11 are formed in the top plate 1a of the plate making machine body 1 facing the primary transport roller 5 and the exposure stage 9. Then, the document table 1 is provided on the plate making machine body 1.
A lamp house 13 having 2 is installed. The lamp house 13 has a left side base portion shown in FIG. 1 hinged to the plate making machine main body 1 by a lamp house hinge 14, and a bottom wall capable of closing the working hole 10 when in a normal position shown by a solid line. 13a and an opening 13b that can be aligned with the exposure window 11
The lamp house 13 is held at the open position indicated by the phantom line by the gas stay 15 provided between the lamp house 13 and the plate making machine main body 1, and the lamp house 13 is restored to the normal state indicated by the solid line by strongly pushing the lamp house 13 downward. can do.

At the front part of the lamp house 13, a document table 12 whose lower part is hinged by a hinge 16 is attached. That is, the document can be positioned between the pad 18 of the document table 12 that can be opened and closed in the direction of arrow A by the handle 17 and the holding glass 19. And the lamp house 13
An illumination lamp 20 for illuminating an original attached to the original table 12, a projection lens 22 supported by a lens plate 21, and a reflection mirror 23 are incorporated in the interior of the original table 12, and the original image projected by the projection lens 22 is reflected. An image is formed on the exposure plate 24 of the exposure stage 9 by the mirror 23.

The exposure stage 9 is provided with an exposure plate 24 whose end opposite to the primary transport roller 5 is tiltably supported by a tilting shaft 25. As shown in FIGS. A vacuum box 27 capable of applying a vacuum pressure from a vacuum hole 26 is fixed to the lower portion of the exposure plate 24 having the suction holes 24a formed therein. A tilting rod 29 extending from a crank shaft 28a of a tilting motor 28 incorporated in the plate making machine body 1 is coupled to an intermediate portion of the exposing plate frame 24b on one side of the exposing plate 24. The exposure plate 24
And the exposure plate frame 24b is the same as the exposure position in FIG. 8 (b).
It can be reciprocally tilted to and from the master discharge position of (d). Further, as shown in FIG. 6, a plurality of belt grooves 24c extending in the feeding direction of the master paper X are formed on the surface of the exposure plate 24, and a rotating arm 30 having a base portion pivotally supported on the exposure plate frame 24b. Movable pulley 31A supported on the tilting shaft 25, pulley 31B fixed to the tilt shaft 25, the exposure plate frame
A plurality of endless feed belts 33, which are wound between the pulleys 31c of the pulley shafts 32 of 24b, are arranged in the belt grooves 24c described above. A driven pulley 34 is fixed to the shaft end of the tilting shaft 25 as shown in FIG.
4 is driven in the forward rotation direction or the reverse rotation direction to the left in FIG. 1 by the drive belt 37 that is wound around the drive pulley 36 of the belt drive motor 35. An upper limit stopper 30U and a lower limit stopper 30L that can contact the rotating arm 30 from above and below when the exposure plate frame 24b is at the exposure position or the master discharge position are arranged in the movement trajectory of the exposure plate frame 24b.

Returning to FIG. 2, the exposed master paper X is taken from the exposure plate 24 at the master discharge position to the secondary transfer roller 38 of the discharge side transfer system. That is, the discharge side transport system that descends below the supply side transport system described above is provided with a rinse / squeeze device 39, and the electrostatic latent image of the master paper X is passed while passing through the developer spray 39a of the rinse / squeeze device 39. Is developed. Further, the discharge side transport system is provided with two pairs of relay rollers 40A, 40B and a discharge roller 41 following the rinse / squeeze device 39, and a panel heater 42 arranged between these rollers 40A, 40B, 41
The original image on the surface of the master paper X is fixed, and the master paper X is taken out onto the paper discharge tray 43 outside the plate making machine main body 1 by the rotation feed motion of the discharge roller 41.

2 to 4 show a master width aligning device provided on the lower surface of the top plate 1a so as to surround the exposure window 11. The master width aligning device is arranged in the feeding direction of the master paper X. And a pair of guide rails 44L and 44R arranged on both front and rear sides of the exposure window 11 in a state of being extended in a direction orthogonal to the vertical direction (width direction of the master paper X), near both ends of the guide rails 44L and 44R. At the position, four sliders 45A, 45B, 45C, 45D are slidably supported along corresponding guide rails 44L, 44R. Then, a pair of sliders (45A and 45D, which are opposed to each other in the feeding direction of the master paper X, and
45B and 45C), a pair of U-shaped connecting members 46A, 46
Both end portions of B in the front-rear direction are fixed, and the fixed ruler plate 47 hanging toward the exposure plate 24 is fixed to the lower surface of one of the U-shaped connecting members 46A. A motor mounting portion 46a is integrally connected to one end of a U-shaped connecting member 46B for connecting the remaining sliders 45B and 45C. The motor mounting portion 46a has a groove cam 49 on the drive shaft 48a. The reciprocating motor 48 is fixed, and the groove cam 49 has a pair of guide pins 50 planted on the lower surface of the U-shaped connecting member 46B.
Cam follower 53 of reciprocating member 52 engaged with slot 51 in
Are engaged. A movable ruler plate 54 that is suspended above the exposure plate 24 in a state of facing the fixed side ruler plate 47 is fixed to the reciprocating member 52 that reciprocates in the width direction of the master paper X. On the surface of the movable side ruler plate 54 facing the fixed side ruler plate 47, a pair of leaf springs 55 having one end fixed to the movable side ruler plate 54 are fixed in a cantilever state. Therefore, as will be described later, the movable ruler plate 5
4 are reciprocated, these leaf springs 55 cause the exposure plate 2 to move.
4 can be elastically contacted with the corresponding side edge of the master paper X.

On the other hand, as shown in FIG. 2 and FIG. 4, four sheaves 56A, 56B, 56C and 56D which are extensions of the guide rails 44L and 44R are provided on the lower surface of the top plate 1a of the plate making machine main body 1. These sheaves 56A are rotatably arranged on the lower surface of the top plate 1a.
Between the sheave 56A and the sheave 56D among the 56B, 56C, 56D, a pair of L-shaped brackets 59A, 59B supporting an adjusting shaft 58 having a width setting knob 57 are provided on the lower surface of the top plate 1a. Will be placed. As shown in FIG. 4, the same L-shaped bracket 59A, 59B has a wire shaft 6 parallel to the adjustment shaft 58.
A reduction gear 62 meshing with a wire drive gear 61 fixed to the adjustment shaft 58 and a click disk 63 integrally formed with the reduction gear 62 are fixed to the wire shaft 60. Clicks 64 (shown in FIG. 4) facing the movement loci of a plurality of semi-fixed holes (not shown) of the click disk 63 are fixed to the L-shaped brackets 59A and 59B. And each of the sheaves 56A, 56B, 56C, 56D.
And the wire shaft 60 between the fixed-side ruler plate 47
A wire 65 for driving the movable side ruler plate 54 and the movable side ruler plate 54 in opposite directions is installed in a tensioned state as follows. That is, the one end portion 65a of the wire 65 is wound around the wire shaft 60, and then the sheave 56A → the sheave 56B → the sheave 56A → the sheave 56B.
→ Sheave 56C → Sheave 56D → Sheave 56C → Sheave 56D, and the other end portion 65b of the wire 65 is connected endlessly to the end portion 65a from the sheave 56D via a tension spring 66. Also, from the sheave 56A to the sheave.
Portion 65c of wire 65 towards 56B and said sheave 56D
The portion 65d of the wire 65 extending from the sheave 56C to the sheave 56C is connected to one of the U-shaped connecting members 46A by the stays 67A and 67B, and from the sheave 56B to the sheave 56A.
The portion 65e of the wire 65 toward the sheave 56C and the portion 65f of the wire 65 from the sheave 56C toward the sheave 56D are connected to each other.
67C and stay 67D, the other of the U-shaped connecting members
Since the wires 65 are respectively fixed to the 46B, when the wire 65 is driven in the clockwise direction in FIG. 2, the fixed side ruler plate 47 and the movable side ruler plate 54 are driven toward each other, and the wire 65 is not moved. When driven in the counterclockwise direction 2, the fixed-side ruler plate 47 and the movable-side ruler plate 54 are driven in the direction away from each other in the width direction of the master paper X.

As shown in FIGS. 6 and 7, one end of the above-mentioned exposure plate 24 is provided with a master tip position adjusting mechanism for regulating the tip position of the master paper X to be exposed.
That is, a pair of mounting brackets 68A and 68B are fixed to one end of the front surface of the exposure plate 24.
The adjustment shaft 6 extending in the width direction of the master paper X is located between 68A and 68B.
9 is rotatably supported, and a tip position adjusting knob 70 that can be manually operated is fixed to the adjusting shaft 69. A stopper groove 24e extending in the feeding direction of the master paper X (the length direction of the master paper X) is formed between the mounting brackets 68A and 68B facing each other, and the master paper X is inserted in the stopper groove 24e. Master stopper 71 that stops the tip
A rack 72 attached at one end is slidably positioned, and this rack 72 is fixed to the adjustment shaft 69 by a pinion 73.
Meshed with. Therefore, the tip position adjusting knob 70
When is rotated, the rack 72 and the master stopper 71 are moved in the length direction of the master paper X by the pinion 73 rotated by the adjustment shaft 69, so that the stop position of the master paper X on the exposure plate 24 changes. Therefore, the master paper X
The exposure position of the document image with respect to can be adjusted.

Since the plate making machine of the illustrated embodiment has the above structure, the roll-shaped master X is processed through the following steps.
_The original image is exposed and developed for ₁ or the cut master X ₂ . In the standby state of the plate making machine, the tilting rod 29 of the tilting motor 28 is located just before the top dead center, and the exposure plate 24 and the endless feed belt 33 are in the state shown in FIG. 8 (a). That is, since the upper limit stopper 30U engages with the rotating arm 30, the upper side 33a of the endless feed belt 33 is in a state of being aligned with the primary transport roller 5, the paper feed roller 4, etc., but the exposure plate 24 Is placed slightly lower than the horizontal position. Therefore, when the cut master X ₂ or the roll-shaped master X ₁ is supplied to the paper feed roller 4 after the original is mounted on the original table 12, the belt drive motor 35 is rotated in the normal direction, so that the master paper X
Is charged while passing between the chargers 8 and is mounted on the exposure plate 24 by the forward rotation motion of the primary transport roller 5 and the endless feed belt 33, and is stopped by the master stopper 71.
When the master paper X is detected, the belt drive motor 35
Is stopped and the reciprocating motor is started for a fixed time. Therefore, the groove follower 49 of the reciprocating motor causes the cam follower 53 integrated with the reciprocating member 52 to reciprocate in the width direction of the master sheet X, and the movable ruler plate 54 fixed to the reciprocating member 52 reciprocates. . As a result, the leaf spring 55 of the movable side ruler plate 54 elastically contacts the corresponding side of the master sheet X, and the master sheet X on the upper side 33a of the endless feed belt 33 is moved along the fixed side ruler plate 47. , Master paper X
The position in the width direction of is specified. Through the above steps, the alignment of the front end position and the width direction of the master paper X is completed, the tilting motor 28 is normally rotated again, and the tilting rod 29 is rotated to the top dead center. In this case, for the rotating arm 30,
Since the upper limit stopper 30U has already hit, the upper side portion 33a of the endless feed belt 33 does not rise further,
As shown in FIG. 8B, the exposure plate 24 and the vacuum box 2
7 rises and the master paper X on the upper side 33a of the endless feed belt 33 is attracted to the surface of the exposure plate 24 by the vacuum pressure of the vacuum box 27, so that the flatness of the master paper X is maintained. Become. Therefore, after this step, the illumination lamp is turned on, the original image is projected on the surface of the master paper X by the projection lens 22, and the master paper X is exposed. After the exposure, the tilting tilt motor 28 tilts the tilt rod. 29 is rotated to the position shown in FIG. 8 (c). That is, when the exposure plate 24 and the vacuum box 27 reach the position shown in FIG. 8C, the rotating arm 30 engages with the lower limit stopper 30L, and the upper side portion 33a of the endless feed belt 33 becomes the secondary conveying roller 38. Become a line. Then, when the tilting rod 29 is rotated to the bottom dead center position shown in FIG. 8 (d), the upper end of the endless feed belt 33 is locked by the lower limit stopper 30L.
The exposure plate 24 and the vacuum box 27 are further rotated without changing the position of 33a, and the exposure plate 24 is separated from the master paper X on the upper side 33a of the endless feed belt 33.
Next, since the belt drive motor 35 is rotated in the reverse direction, the master paper X is taken up by the secondary transport roller 38, and the electrostatic latent image on the surface of the master paper X is developed while passing through the rinse / squeeze device 39. The image is fixed by the heating of the panel heater 42, and the master paper X is discharged onto the paper discharge tray 43. When the ejection of the master paper X is detected, the tilting motor 28 is started again, and the endless feed belt 33 and the exposure plate 24 are returned to the state shown in FIG. 8 (a),
It will be on standby in the same state.

When manufacturing the printing master, in order to adjust the exposure position in the lengthwise direction with respect to the master paper X, it is sufficient to manually operate the tip position adjusting knob 70. That is, when the tip position adjusting knob 70 is manually operated, the rack 72 and the master stopper 71 are slid in the length direction of the master paper X by the pinion 73 of the adjusting shaft 69 to which the tip position adjusting knob 70 is fixed. A document image can be exposed on the surface of the master paper X according to the image position of the light printing machine in which the master is used.

When the master for printing is manufactured, the position of the fixed side ruler plate 47 is adjusted according to the size of the master paper X by manually operating the width setting knob 57. That is, when the fixed side ruler plate 47 is in the position shown by the solid line in FIG. 2, the movable side ruler plate 54 is also in the position shown by the solid line, and the movable side ruler plate 54 is shown by the imaginary line "a" by the reciprocating motor. Back and forth. Further, the fixed side ruler plate 47 is
By manually operating the width setting knob 57, it is placed in a semi-fixed state at the imaginary line "b ₁ " or "c ₁ " position in FIG. 2, but in these cases, the movable side ruler plate 54 is It is reciprocated to the line "b ₂ " or "c ₂ " position. In other words, by manually adjusting the width setting knob 57, the space between the fixed-side ruler plate 47 and the movable-side ruler plate 54 is changed to the size of the master paper X to be exposed (dimension in the width direction of the master paper X). A corresponding relationship between the fixed ruler plate 47 and the movable ruler plate 54 can be obtained.

When the master paper X is in a "jam" state in the plate making machine main body 1 or in order to perform maintenance management inside the machine,
It is sufficient to lift the lamp house 13 upward. in this case,
The lamp house 13 is opened to the state shown by the phantom line in FIG. 1 with the lamp house hinge 14 as a fulcrum, and this state is maintained by the gas stay 15. However, when the lamp house 13 is opened, the work hole 10 of the plate making machine body 1 and The exposure window 11 is opened to the outside. Therefore, not only the master paper X in the "jammed" state that can be seen from the work hole 10 and the exposure window 11 can be removed, but also the paper feed roller 4, the charger 8, the primary transport roller 5, and the exposure corresponding to the work hole 10 can be removed. Window 11
It is possible to maintain and manage the components of the exposure stage 9 corresponding to.

[0017]

As is apparent from the above description, according to the present invention, the tiltable exposure plate is provided at one end of the feed side transport system provided on the upper part of the plate making machine, and the master paper is exposed on the exposure plate. After that, the master paper can be developed and fixed by the discharge side transport system located below the supply side transport system with the endless feed belt attached to the exposure plate, so a small plate making with a small installation area is possible. You have the opportunity. Moreover, in the plate making machine of the present invention, since the exposure plate having a vacuum box capable of adsorbing the master paper and the endless feed belt for feeding and discharging the master paper can be moved relative to each other, the exposure plate having high flatness can be obtained at the time of exposure. Since the master paper can be adsorbed and the master paper can be peeled off from the exposure plate when the paper is conveyed, it is possible to achieve a plate making machine having an exposure table with good image quality and less likely to cause "jam".

[Brief description of drawings]

FIG. 1 is an overall sectional view of a plate making machine according to the present invention.

FIG. 2 is a bottom view of the master width aligning device of the plate making machine.

3 is a sectional view taken along line 3-3 of FIG.

4 is a cross-sectional view taken along line 4-4 of FIG.

FIG. 5 is an enlarged side view around the exposure plate of the plate making machine shown with a part cut away.

FIG. 6 is a plan view around the exposure plate.

FIG. 7 is an enlarged perspective view of a master tip position adjusting mechanism of the plate making machine.

FIG. 8A to FIG. 8D are operation process explanatory views around the exposure plate.

[Explanation of symbols]

 X master paper 5 primary conveyance roller 9 exposure stage 13 lamp house 24 exposure plate 25 tilting shaft 27 vacuum box 30 rotating arm 30U upper limit stopper 30L lower limit stopper 31A movable pulley 33 endless feed belt 38 secondary conveyance roller

Claims (1)

(57) [Scope of utility model registration request] 1. A plate making machine, which charges a cut master paper, sends it to an exposure stage, exposes an original image on the master paper, and then develops and fixes the latent image on the master paper. A substantially horizontal supply-side transport system for sending the image is provided in the upper part of the plate making machine main body, a lamp house for projecting a document image is arranged on the upper part of the exposure stage, and a tilting shaft opposite to the supply-side transport system is provided. When an exposure plate that can be tilted as a center is provided on the exposure stage, and an endless feed belt that feeds and ejects master paper to and from the exposure plate is provided so as to surround the exposure plate, and the exposure plate is in a tilted position. The discharge side transport system that picks up the exposed master paper from the exposure plate and develops and fixes the latent image is arranged below the supply side transport system in an inclined state, and the master paper can be attracted to the exposure plate. A vacuum box is provided under the exposure plate, and a rotary arm having a movable pulley for hanging the endless feed belt is pivotally supported on a portion of the exposure plate near the movable end, and the position of the rotary arm can be regulated. A plate making machine characterized by having an exposure table in which an upper limit stopper and a lower limit stopper are arranged within a movement locus of a rotating arm.