JP4598366B2 - Plate making equipment / Stencil printing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plate making apparatus for making a master (stencil paper) based on image information and a stencil printing apparatus having the plate making apparatus.
[0002]
[Prior art]
In this type of stencil printing apparatus, the tip of the master made by the plate making apparatus is clamped by a clamper provided on the outer surface of the plate cylinder, and the master is wound while rotating the plate cylinder.
Positioning at the time of clamping (clamp registration) is a method in which the tip of the master reaches the clamp position by holding and transporting the master for a certain period of time with a pair of transport rollers provided near the plate feed standby position of the plate cylinder Has been adopted. For this reason, an electromagnetic clutch and a stepping motor are required to drive the pair of conveying rollers, which has increased costs.
There is also a system in which it is considered that the leading end of the master has reached the clamp position by transporting the master for a certain period of time with the front tension roller pair on the downstream side of the platen roller without providing the pair of transport rollers. In this system, in the configuration having the master stock means, a stopper that abuts the leading end of the master is formed on the clamper portion of the plate cylinder, and a master pool is formed above the opening of the master stock means by overfeed. .
[0003]
Regardless of the presence or absence of the master stock means, in the method of conveying by the pair of front tension rollers, a guide member for guiding the master to the clamp position is provided because the conveying process is long.
As shown in FIG. 6, the master 24 is conveyed by the platen roller 26 while being made by the thermal head 17, and is conveyed while being tensioned by the front tension roller pair 40. The guide member is composed of a lower guide plate 55 and an upper guide plate 56, and the master is guided between the guide plates to reach a clamping position by the clamper 8 of the plate cylinder 5.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 6-30040
[Problems to be solved by the invention]
However, in the case of a master that is weak and easy to curl, there is a problem that a conveyance failure occurs at the guide member entrance indicated by a dashed-dotted circle in FIG.
As shown in FIG. 7, the curled tip 24 c of the master 24 hits the edge of the upper guide plate 56, and it may be shifted upward and disengaged from the guide member entrance. In addition, as shown in FIG. 8, when the curl is small, it may be curled at the entrance of the guide member and may not advance further.
[0006]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a plate making apparatus and a stencil printing apparatus having the plate making apparatus that can suppress poor conveyance even with a curled master without causing an increase in cost.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, there is provided a plate making and conveying means for making a plate and conveying the master based on the image information. In a plate making apparatus that conveys a predetermined amount while being guided by a guide member having a configuration and reaches the tip of the plate cylinder to a clamper, it is provided upstream of the guide member in the master conveyance direction and rotates to push the master downward. The guide member has a conveyance guide roller that guides the leading end of the master, and is a sponge roller, a metal roller, or a plastic roller .
[0008]
According to a second aspect of the present invention, in the plate making apparatus according to the first aspect, the conveyance guide roller is rotationally driven by the same drive source as the plate-making conveyance means.
[0009]
According to a third aspect of the present invention, in the plate making apparatus according to the first or second aspect, there is provided a master stock means for sucking and storing the master transported by the plate making transport means by means of an air suction source. Is adopted.
[0010]
According to a fourth aspect of the present invention, in the stencil printing apparatus that performs printing by winding a master made by the plate making apparatus around the outer peripheral surface of the plate cylinder , the plate making apparatus is any one of the first to third aspects. The plate making apparatus described in the above is adopted.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a schematic front view of a main part of a stencil printing apparatus according to the present embodiment. In FIG. 1, a stencil printing apparatus 1 includes a printing unit 2, a plate making apparatus 3, and a paper feeding apparatus 4.
The printing unit 2 is located substantially in the center of the apparatus main body (not shown), and is in contact with the plate cylinder 5 that is rotated in the clockwise direction in FIG. A press roller 6 is provided that is detachable and presses the sheet P fed from the sheet feeding device 4 against the plate cylinder 5.
The plate cylinder 5 has a porous support plate 5a attached to each peripheral surface of a pair of flanges (not shown) on both side edges, and a mesh screen (not shown) wound around the outer periphery of the porous support plate 5a. In the porous support plate 5a, an opening portion having a plurality of openings 5b is formed.
[0015]
A non-opening portion of the porous support plate 5a is provided with a stage portion 7 having a plane along one generatrix of the plate cylinder 5, and a clamper supported on the stage portion 7 so as to be opened and closed by a support shaft 8a. 8 is disposed.
The clamper 8 is opened and closed by opening / closing means (not shown) when the plate cylinder 5 occupies a predetermined position.
An ink supply means 9 is disposed inside the plate cylinder 5. The ink supply means 9 includes an ink supply pipe 10 that also serves as a support shaft of the plate cylinder 5, an ink roller 11, a doctor roller 12, and the like.
[0016]
The ink supply pipe 10 is disposed between a pair of flanges (not shown), and each flange is rotatably supported via a bearing (not shown). An ink pump and an ink pack (not shown) are connected to the ink supply pipe 10, respectively, and the ink in the ink pack is supplied to the inside of the plate cylinder 5 from a plurality of ink supply holes 10 a provided in the ink supply pipe 10 by the operation of the ink pump. To be supplied.
The intake roller 11 is rotatably supported between a pair of side plates (not shown) disposed between a pair of flanges (not shown) and fixed to the ink supply pipe 10. Synchronously driven to rotate in the same direction.
The ink roller 11 is disposed at a position where a slight gap is generated between the peripheral surface thereof and the inner peripheral surface of the plate cylinder 5.
[0017]
A doctor roller 12 is disposed in the vicinity of the ink roller 11. The doctor roller 12 is also rotatably supported between side plates (not shown) like the ink roller 11 and is rotated in the reverse direction in synchronization with the ink roller 11 by a rotation driving means (not shown). The doctor roller 12 is disposed at a position where a slight gap is generated between the peripheral surface of the doctor roller 12 and the peripheral surface of the ink roller 11.
A space having a wedge-shaped cross section is formed in the vicinity of the ink roller 11 and the doctor roller 12, and the ink reservoir 13 is formed by storing the ink supplied from the ink supply hole 10a in this space. The ink in the ink reservoir 13 is supplied in a thin layer on the circumferential surface of the ink roller 11 when passing through the proximity of the ink roller 11 and the doctor roller 12, and the plate cylinder 5 is pressed by the press roller 6. At this time, the peripheral surface of the intake roller 11 and the inner peripheral surface of the plate cylinder 5 come into contact with each other, and the inner surface of the plate cylinder 5 is supplied.
[0018]
A press roller 6 is disposed below the plate cylinder 5. A press roller 6 having substantially the same length as the axial length of the plate cylinder 5 and having an elastic body such as rubber wound around the core portion 6a has a pair of press roller arms 14 at both ends of the core portion 6a. Are rotatably supported between one end of each. A pair of press roller arms 14 which are plate-like members are fixed at the other end to a press roller shaft 15 rotatably supported by an apparatus main body (not shown), and are integrally formed by a press roller swinging means (not shown). Rocks. By this swinging, the press roller 6 has a separation position shown in FIG. 1 where the peripheral surface is separated from the outer surface of the plate cylinder 5 and a pressing position where the peripheral surface contacts the outer peripheral surface of the plate cylinder 5 with a predetermined pressing force. And selectively occupy.
[0019]
A plate making apparatus 3 is disposed on the upper right side of the printing unit 2. The plate making apparatus 3 includes a master storage member (not shown), a platen roller 16, a thermal head 17, a front tension roller pair 40, a cutting means (cutting means) 18, a master conveyance guide 23, a master stock means 19, a conveyance guide roller 60, and a movable master. A guide plate 21 and a guide member 57 are provided.
Master storage members (not shown) are respectively provided on a pair of side plates (not shown) of the plate making apparatus 3, and support a core portion 24b of a master roll 24a in which the master 24 is wound in a roll shape so as to be rotatable and detachable. .
[0020]
The master 24 in the present embodiment has a three-layer structure in which a porous resin film made of a resin is provided on one surface of a thermoplastic resin film and a porous fiber film made of a fibrous substance is laminated on the surface. (See JP 10-147075 A). This master has the characteristics that the ink can be uniformly transferred (high image quality) and the ink consumption can be reduced although the stiffness is weak and the strength is low. It is not intended to be limited to the use of this master.
A platen roller 16 is arranged on the left side of the arrangement position of the master roll 24a. The platen roller 16 is formed such that its axial length is substantially the same as the width of the master 24, and is rotatably supported between side plates (not shown) of the apparatus main body.
The platen roller 16 receives a driving force from a stepping motor (not shown) provided in the apparatus main body, and is driven to rotate clockwise in FIG.
[0021]
A thermal head 17 is disposed below the platen roller 16. The thermal head 17 is formed to have a width larger than the length in the width direction of the platen roller 16, and a plurality of heating elements are disposed on the upper surface thereof, so that the heating elements are pressed against the peripheral surface of the platen roller 16. Further, it is biased by a biasing means (not shown). The operation of each heating element is individually controlled by a thermal head driver (not shown), and an operation signal corresponding to image information from an image reading unit (not shown) provided on the upper part of the apparatus body is input to the thermal head driver (not shown). Is done.
The thermal head 17 and the platen roller 16 described above constitute a plate making and conveying means 26 for carrying out plate making and conveying of the master 24.
[0022]
A front tension roller pair 40 having an upper front tension roller 40a and a lower front tension roller 40b is disposed downstream of the platen roller 16 in the master conveyance direction. The front tension roller pair 40 has a function of applying tension to the master 24 on the downstream side of the platen roller 16 and is rotationally driven by the same drive source as the platen roller 16.
On the downstream side of the front tension roller pair 40, cutting means 18 for cutting the master 24 made at a predetermined position is disposed, and on the downstream side, a master guide plate 23 is disposed.
The cutting means 18 is fixed to the apparatus main body, and has a lower blade and an upper blade. The cutting means 18 may be either a guillotine type or a rotary blade type.
[0023]
On the downstream side of the master guide plate 23, master stock means 19 having an opening for introducing a master at the top is disposed. The master stock means 19 for temporarily storing the master-making master 24 includes a stock main body portion 34 having a casing shape, a suction fan 35 provided above the back of the stock main body portion 34, and a stock main body portion 34. On the other hand, it has a master removal tray 36 which is provided so as to be freely taken in and out (removable / removable) along the drawing path of the master.
A negative pressure is generated inside the master stock means 19 which is a sealed space by the operation of the suction fan 35, and the master 24 which has been subjected to plate making and transported is sucked toward the back of the master stock means 19. Stored (see FIG. 4). Details of the master stock means 19 will be described later. In addition, each side surface (wall surface) in the stock main body 34 actually has a thickness but is displayed with a single line (the same applies to other drawings).
[0024]
A conveyance guide roller 60 and a guide member 57 are provided on the left side (downstream side) of the master stock means 19, and below the guide member 57, the master 24 is attached to the master 24 when the master 24 is wound around the plate cylinder 5. There is provided tension applying means 61 for applying tension to prevent loosening. The conveyance guide roller 60 is rotationally driven by the same drive source as the platen roller 16. The guide member 57 has a lower guide plate 58 and an upper guide plate 59. The tension applying means 61 is selectively positioned at a retraction position shown in FIG. 1 and a contact position shown by a two-dot chain line in FIG. 4 by a shaft 61a and a drive member (not shown) rotatably provided on the shaft 61a. It has a movable arm 61b and a brake roller 61c rotatably supported at the tip of the movable arm 61b.
[0025]
A movable master guide plate 21 is arranged on the upper surface of the opening of the master stock means 19. The movable master guide plate 21 has a base end attached to a support shaft 21a rotatably supported between side plates (not shown), and is a master that is transported by plate making by a stepping motor (not shown) provided in the plate making apparatus 3. It selectively occupies a conveyance position indicated by a solid line that guides 24 to the master conveyance roller pair 20 and a retraction position indicated by a two-dot chain line that does not interfere when the master 24 is guided into the master stock means 19.
[0026]
A paper feeding device 4 is disposed on the right side of the printing unit 2 and below the plate making device 3. The sheet feeding device 4 includes a sheet feeding tray 27, a sheet feeding roller 28, a registration roller pair 29, and the like.
A paper feed tray 27 on which a large amount of paper P can be stacked is supported by an apparatus body (not shown) so as to be movable up and down, and is moved up and down by operation of a tray lifting means (not shown).
[0027]
A paper feed roller 28 is disposed above the paper feed tray 27 and at a position corresponding to the front end of the paper P in the transport direction. A paper feed roller 28 having a high friction resistance member on its peripheral surface is rotatably supported between side plates (not shown) of the paper feed device 4 and is urged downward in FIG. 1 by an urging means (not shown). . The paper feed roller 28 presses the uppermost paper P on the paper feed tray 27 with a predetermined pressure when the paper feed tray 27 is raised to the paper feed position by a tray lifting / lowering means (not shown), and feeds the paper feed device 4. 1 is rotated in the clockwise direction in FIG.
A sheet separating member 30 made of a high friction resistance member is disposed below the sheet feeding roller 28 and at a position downstream of the leading end of the sheet P in the sheet conveying direction on the sheet feeding tray 27. Yes. The sheet separating member 30 is pressed against the peripheral surface of the sheet feeding roller 28 with a predetermined pressing force by an urging means (not shown).
[0028]
A registration roller pair 29 is disposed at a position downstream of the paper feed roller 28 and the paper separating member 30 in the paper transport direction. A registration roller pair 29 composed of a driving roller 29a and a driven roller 29b, both of which are rotatably supported between side plates (not shown) of the sheet feeding device 4, is connected to a driving roller 29a that is rotated by a driving force transmitted from registration driving means (not shown). After the paper P drawn from the paper feed tray 27 by the paper feed roller 28 is temporarily stopped by the driven roller 29b brought into pressure contact therewith, it is directed between the plate cylinder 5 and the press roller 6 at a predetermined timing. To feed.
A sheet guide plate 31 is disposed at a position between the sheet feeding roller 28 and the registration roller pair 29, and a sheet guide plate 32 is disposed at a position downstream of the registration roller pair 29 in the sheet conveyance direction. Each of the paper guide plates 31 and 32 is fixed to a side plate (not shown) of the paper feeding device 4.
[0029]
An image reading unit (not shown) for reading a document image is provided on the upper part of the apparatus main body. The image data read by the image reading unit is stored after being stored in an image memory (not shown), and is called up by the thermal head 17 to make the master 24.
On the upper left side of the printing unit 2, there is provided a plate removal device (not shown) that peels off the used master wound on the plate cylinder 5. The plate discharging apparatus has a well-known configuration having a plate discharging member that can come into contact with and separate from the peripheral surface of the plate cylinder 5, and is used in the plate discharging box for storing the used master peeled off from the plate cylinder 5 and in the plate discharging box. A compression plate for compressing the master is provided.
On the lower left side of the printing unit 2, a paper discharge unit (not shown) for discharging the paper P printed by the printing unit 2 to the outside of the apparatus is provided. The paper discharge unit has a known configuration including a peeling claw for peeling the paper P from the outer peripheral surface of the plate cylinder 5, a paper transport unit for transporting printed paper, a paper discharge tray on which printed paper can be stacked, and the like.
[0030]
Based on the above configuration, the operation of the stencil printing apparatus 1 will be described below.
When an original is set in the image reading unit and a plate making start key on an operation panel (not shown) provided on the upper portion of the apparatus body is pressed by an operator, an image reading operation and a plate discharging operation are performed in parallel. When the plate removal operation is completed, the plate cylinder 5 rotates and stops to the plate feeding position where the clamper 8 is located at the position substantially right to the right. The clamper 8 is opened by the opening / closing means, and the stencil printing apparatus 1 is shown in FIG. It will be in a standby state.
At this time, the tension applying means 61 moves to the retracted position by the opening operation of the clamper 8.
In parallel with the image reading operation, the plate making apparatus 3 performs the plate making operation. When the plate making start key is pressed, a stepping motor (not shown) is actuated to rotate the platen roller 16, and the front tension roller pair 40 and the conveyance guide roller 60 are rotationally driven. It is pulled out from 24a. The drawn master 24 is made according to the image data read when passing between the platen roller 16 and the thermal head 17.
[0031]
After the plate making, the master 24 is conveyed by the front tension roller pair 40, guided to the guide member 57 by the conveyance guide roller 60, and abuts against the stopper 8 b of the clamper 8 through the guide member 57. By subsequent overfeed control, a master pool (deflection) 24e for smooth suction is formed above the opening of the master stock means 19.
Even if the leading end portion of the master 24 is curled, as shown in FIG. 3, the leading end portion 24c of the master 24 is pushed in by the clockwise rotation of the conveying guide roller 60 and smoothly enters the guide member 57 without being caught. To be guided to.
If the surface frictional resistance of the conveyance guide roller 60 is large, such as a rubber roller, the master pool 24e is not formed at a normal position above the opening of the master stock means 19 in overfeed, and the gap between the conveyance guide roller 60 and the stopper 8b. It causes a poor suction. Further, there is a concern that the leading end of the master 24 is caught at the position of the conveyance guide roller 60, resulting in conveyance failure.
[0032]
From such a viewpoint, the conveyance guide roller 60 has a normal surface with a small friction coefficient. In this embodiment, a sponge roller is employed. You may use a metal roller, a plastic roller, etc. That is, the conveyance guide roller 60 does not obtain a conveyance function, but has a function of smoothly guiding the leading end portion of the master 24 to the guide member 57.
Further, in the formation of the master reservoir 24e in the overfeed control, the conveyance guide roller 60 serves as a formation starting point, and the master reservoir 24e is reliably formed above the opening of the master stock means 19.
[0033]
When the predetermined overfeed is completed, the opening / closing means (not shown) is actuated to close the clamper 8, and the leading end of the master 24 is clamped. When the master 24 is sandwiched, the stepping motor that drives the movable master guide plate 21 is activated. The movable master guide plate 21 is rotated in the clockwise direction and positioned at the retracted position as shown in FIG. Further, the suction fan 35 is operated simultaneously with the operation of the stepping motor.
The thermal head 17, the platen roller 16, the front tension roller pair 40, and the conveyance guide roller 60 continue to operate and rotate even after the overfeed is completed, and the master 24 thus made is sucked by the suction fan 35, thereby It is stored inside the stock means 19.
[0034]
When the clamper 8 is closed, the brake roller 61c of the tension applying means 61 is set at the abutting position as shown by a two-dot chain line, and the plate cylinder 5 is intermittently rotated at a low speed in the clockwise direction in FIG. The master 24 is wound around the plate cylinder 5.
When the plate making operation proceeds and it is determined that the master 24 for one plate has been made from the number of steps of a stepping motor (not shown) that drives the platen roller 16, the operation of the stepping motor is stopped and the cutting means 18 is activated. Then, the master 24 is disconnected. The cut master 24 is drawn from the plate making apparatus 3 by the rotation of the plate cylinder 5 and wound on the outer peripheral surface of the plate cylinder 5.
When the winding operation is completed, a stepping motor (not shown) is operated, and the movable master guide plate 21 is rotated counterclockwise about the support shaft 21a and positioned at the transport position shown in FIGS. .
[0035]
When the movable master guide plate 21 is positioned at the transport position, the paper feed roller 28 is driven to rotate and a sheet of paper P is fed from the paper feeder 4 and the plate cylinder 5 is rotated clockwise at a low speed. Driven by rotation. The paper P separated and fed by the paper separation member 30 is temporarily stopped with its leading edge sandwiched between the nip portions of the registration roller pair 29, and the skew is corrected.
The registration roller pair 29 is rotationally driven at the timing when the leading end of the plate making image area of the master 24 wound on the plate cylinder 5 reaches a position corresponding to the press roller 6, and the paper P is fed toward the printing unit 2. Sent.
[0036]
The press roller swinging means operates almost simultaneously with the operation of the registrar pair 29, and the press roller 6 contacts the outer peripheral surface of the plate cylinder 5. By this contact, the porous support plate 5a, the mesh screen (not shown), the master 24, the paper P, and the press roller 6 come into contact with each other with a predetermined pressing force, and the ink supplied to the inner peripheral surface of the plate cylinder 5 by the ink roller 11 is transferred. It is transferred to the paper P through the opening 5b, the opening of a mesh screen (not shown), the porous resin film of the master 24, the porous fiber film, and the thermoplastic resin film perforated portion, and so-called printing is performed. The printed paper P is peeled off from the outer peripheral surface of the plate cylinder 5 by a peeling claw (not shown) and discharged onto a paper discharge tray (not shown) via a paper transport unit (not shown).
[0037]
After the printing operation, the operator operates a key on the operation panel to set a print image position or a printing speed, and then presses a test printing key (not shown). When the trial printing key is pressed, the plate cylinder 5 is driven to rotate at a rotational peripheral speed based on the set printing speed, and one sheet P is fed from the paper feeding device 4 and is the same as at the time of printing. Trial printing is performed. The operator confirms the image by trial printing, sets the number of prints on the operation panel, and then presses the print start key. As a result, the paper P is continuously fed from the paper feeding device 4, and printing is performed in the same manner as the trial printing described above.
When the set number of prints is consumed, all the operations are stopped, and the stencil printing apparatus 1 enters the standby state again.
[0038]
Next, the configuration of the master stock means 19 and the master removal function will be described. As shown in FIG. 1, a housing or box-shaped stock main body 34 has a main storage space 34 </ b> A for drawing and storing the master 24 that has been made from the opening opened by the operation of the movable master guide plate 21. The auxiliary storage space 34B is folded back to the upper side of the main storage space 34A by the partition plate 34a, and the suction fan 35 is provided on the back side in the suction direction of the auxiliary storage space 34B. On the right side of the suction fan 35 in the sub-storage space 34B, a filter 34b such as a wire mesh that allows an air flow to pass and prevents the cut piece of the master 24 from entering is provided. On the suction fan 35 side of the filter 34b, a master detection unit 50 configured by, for example, a reflective photosensor is provided.
[0039]
The master removal tray 36 includes a flat tray body 37 that slides inside the bottom surface of the main storage space 34 </ b> A (the bottom surface of the master stock means 19), and a handle member 38 provided at the outer end of the tray body 37. ing. The tray body 37 and the handle member 38 are integrally formed of synthetic resin.
The handle member 38 also has a function as a side surface that closes the opening on the rear end side (direction away from the plate cylinder 5) of the main storage space 34A and the sub storage space 34B.
[0040]
The front end portion of the tray body 37 is bent upward, and a scraper 39 that slides on the lower surface of the partition plate 34a that is the inner surface of the master stock means 19 is provided in the bent portion 37a. The width of the scraper 39 is set to be approximately the same as the width of the partition plate 34a in the width direction of the master 24 orthogonal to the transport direction.
The handle member 38 is formed in a flat plate shape having an area slightly larger than the opening area on the rear end side of the main storage space 34A and the sub storage space 34B. In particular, the lower end protrudes to form a drawer operation portion 38a. ing.
If the master 24 is bent or curled, the tip of the master 24 may be cut in order to make the positioning of the tip of the master 24 accurate. After being sucked into 19, the tray body 37 is pulled out to the right side in the figure and removed. Even if the operator forgets to remove the cut piece 24d, the cut piece 24d sticks to the filter 34b and is detected by the master detecting means 50. For example, a warning is given to the liquid crystal display section of the operation panel (not shown). Plate feeding troubles due to a decrease in suction force are prevented.
[0041]
As described above, the conveyance guide roller 60 does not have a conveyance function and merely guides the tip end portion of the master 24. Therefore, as shown in FIG. 5, an annular groove 60c as a non-contact portion is formed in the axial direction. By providing a plurality and reducing the contact resistance with respect to the master 24 by reducing the area of the contact portion 60b, a smoother guide function can be obtained (second embodiment). In FIG. 5, the code | symbol 60a shows a rotating shaft.
The shape with a small contact area of the conveyance guide roller 60 is not limited to that shown in FIG. 5, and various patterns such as a plurality of semicircular recesses, oval recesses and the like can be employed on the outer peripheral surface.
[0042]
【The invention's effect】
According to the present invention, can also improve the transportability in masters-edge portion is curled, it can be prevented plate supply failure.
[0043]
According to the present invention, it is possible to simplify the configuration, it is possible to reduce the cost because it does not use a stepping motor or the like in the clamping positioning.
[0044]
According to the present invention, it is possible to prevent snagging in conveyance guide rollers, it is possible to improve the transportability because the master plate feeding.
[0047]
According to the present invention, it is possible to form a pool master to a proper position, thereby preventing suction failure.
[Brief description of the drawings]
FIG. 1 is a schematic front view of a stencil printing apparatus according to a first embodiment of the present invention.
FIG. 2 is a schematic front view showing a state in which a master pool is formed by overfeeding with the tip of the master reaching the clamper.
FIG. 3 is a diagram illustrating a guide function of a conveyance guide roller.
FIG. 4 is a schematic front view showing a state in which a pre-made master is stored in master stock means.
FIG. 5 is a perspective view of a conveyance guide roller in the second embodiment.
FIG. 6 is a schematic front view showing conventional clamp positioning.
FIG. 7 is a diagram showing a state where a curled master is caught at an entrance of a guide member in a conventional configuration.
FIG. 8 is a view showing a state in which a curled master is rounded at an entrance of a guide member in a conventional configuration.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 Plate making apparatus 5 Plate cylinder 8 Clamper 19 Master stock means 24 Master 26 Plate making conveyance means 35 Suction fan 57 as air suction source Guide member 60 Conveying guide roller 60c Annular groove

Claims (1)

A plate making and conveying means for making a plate and conveying the master based on the image information, and conveying the predetermined amount while guiding the master conveyed by the plate making and conveying means with a pair of guide members in a non-clamping state. In the plate making device that reaches the clamp of the plate cylinder,
Provided on the upstream side of the guide member in the master conveyance direction, and having a conveyance guide roller that rotates to push the master downward and guides the leading end of the master to the guide member, the conveyance guide roller includes a sponge roller, A plate making apparatus characterized by being a metal roller or a plastic roller .

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