JP3214967B2 - Stencil type stencil printing machine and take-up roll winding shaft - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stencil type stencil printing machine which is an integral type of stencil making and printing.

[0002]

2. Description of the Related Art In a stencil making section and a stencil feeding section of a conventional stencil printing apparatus, a stencil master in which a Japanese paper or the like is bonded to a thermoplastic resin film as a porous flexible support is formed in a roll shape. The stencil master is supplied from the stencil feed roll, and the stencil master is conveyed while being pressed against the thermal head by the platen roller. Therefore, for each plate, the leading end of the master is sandwiched between clamps of the printing drum and wound around the outer periphery of the printing drum. However, recently, in order to improve the print quality and reduce the cost of the plate itself, a master (hereinafter, referred to as a master) consisting essentially of a thermoplastic resin film is used.
(Hereinafter simply referred to as "master"). Since such a master has a weak waist itself, it has been difficult to adopt a conventional method of feeding and conveying a plate using the strength of the waist of the master itself.

In order to solve such a problem,
For example, as shown in Japanese Patent Publication No. 5-70595, a stencil sheet (master) is wound around the outer periphery of a plate cylinder (printing drum) and the outer periphery of a peripheral wall portion (support cylinder) of the plate cylinder. Plate discharging unit (plate feeding unit and plate discharging unit) which is disposed close to the printer and is rotatable relative to the peripheral wall portion.
The plate receiving and discharging unit includes a stencil sheet supply unit (plate supply roll support means) in which at least one end of the stencil sheet is wound and stored in a roll shape, and a stencil sheet from the stencil sheet supply unit. It is considered that a technique provided with a plate discharge winding section (plate discharge roll supporting means) for winding and storing the end and a perforated plate making means (plate making means) for making a stencil sheet is effective.

[0004]

However, in the above-mentioned technique, since ink has adhered to the used master once used for printing, the ink is also taken together when the used master is wound up. I wind up. The ink wound together oozes out from both ends of the wound master due to a tension at the time of winding and a change with time. The ink oozed out in this way remains on the winding shaft of the plate discharging roll. If left as it is, the ink drips and stains the printed matter. In addition to the above-mentioned problems, there is a problem that causes a failure due to splattering into a mechanical unit or the like around the printing apparatus.

Accordingly, in order to solve such a problem, the present invention solves the above problem by causing ink oozing on a winding shaft of a plate discharging roll to drop and contaminate a printed matter, or to cause a problem in a mechanism around a printing apparatus. An object of the present invention is to provide a stencil type stencil printing apparatus that does not scatter and fail.

[0006]

According to a first aspect of the present invention, a stencil master is wound around an outer peripheral surface of a printing drum which rotates around a rotation center axis. An ink supply device that supplies ink to the inner peripheral surface of the drum, plate supply roll supporting means that supports a plate supply roll around which one end of the master is wound, and supplies the master to the printing drum, and the other end of the master is Plate discharging roll support means for supporting a plate discharging roll having a winding shaft for winding the used master from the printing drum, plate making means for making the master, and the plate making means for making the master around the same axis as the rotation center axis. In a stencil type stencil printing apparatus which is rotatable with respect to a printing drum and includes a plate supply / discharge unit having the plate supply roll support means and the plate discharge roll support means, Winding shaft, it consists of an ink absorbent member.

According to a second aspect of the present invention, in the stencil printing machine of the first aspect, the ink-absorbing member has a porous structure, and the porous hole diameter is such that the used master is wound. The farther away from both ends of the part, the larger.

According to the third aspect of the present invention, the first or second aspect is provided.
In the stencil printing machine described above, the cross section of the winding shaft is larger as it goes outward from both ends of the winding portion of the used master.

According to a fourth aspect of the present invention, in the stencil printing machine according to the first, second or third aspect, the ink absorbing member is made of a resin mixed with glass fibers, and the mixed amount of the glass fibers is 10 to 10. 40% by volume.

According to a fifth aspect of the present invention, there is provided a printing drum having a stencil master wound around an outer peripheral surface thereof and rotating around a rotation center axis, an ink supply device for supplying ink to an inner peripheral surface of the printing drum, Plate supply roll support means for supporting a plate supply roll around which one end of the master is wound and supplying the master to the print drum; and a winding for winding the used master around the other end of the master around the print drum. A plate discharging roll supporting means for supporting a plate discharging roll having a take-up shaft, a plate making means for making a plate of the master, and a plate feeding roll rotatable about the same axis as the rotation center axis with respect to the printing drum; In a stencil type stencil printing machine comprising a supporting means and a stencil feeding / discharging unit having the stencil discharging roll supporting means, the stencil printing machine includes a stencil master and a stencil master. It has a configuration provided with an ink suction mechanism.

According to a sixth aspect of the present invention, there is provided a printing drum which is wound around a stencil master around an outer peripheral surface and rotates around a rotation center axis, an ink supply device for supplying ink to an inner peripheral surface of the printing drum, Plate supply roll support means for supporting a plate supply roll around which one end of the master is wound and supplying the master to the print drum; and a winding for winding the used master around the other end of the master around the print drum. A plate discharging roll supporting means for supporting a plate discharging roll having a take-up shaft, a plate making means for making a plate of the master, and a plate feeding roll rotatable about the same axis as the rotation center axis with respect to the printing drum; It is a winding shaft of the stencil roll used in a stencil type stencil printing machine comprising a support means and a stencil supply / discharge unit having the stencil discharge roll support means,
It is characterized in that the winding shaft of the plate discharging roll is made of an ink absorbing member.

[0012]

According to the present invention, the ink that has oozed onto the winding shaft of the plate discharge roll from both ends of the winding portion of the used master is absorbed by the ink absorbing member.
Ink does not leak from both ends of the winding section of the used master.

According to the fifth aspect of the present invention, the ink that has oozed onto the winding shaft of the plate discharging roll from both ends of the winding portion of the used master is sucked by the ink suction mechanism, so that the used master is removed. Ink does not leak from both ends of the winding part.

According to the sixth aspect of the present invention, the ink that has oozed onto the winding shaft of the plate discharge roll from both ends of the winding portion of the used master is absorbed by the ink-absorbing member. Ink does not leak from both ends of the winding part.

[0015]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

Embodiment 1 Embodiment 1 will be described in detail with reference to FIGS. FIG. 1 is a configuration diagram of a main part of a stencil printing machine showing an embodiment of the present invention. First, the overall configuration will be described. In FIG.
0 indicates a stencil type stencil printing machine. Reference numeral 601 denotes a frame disposed at a predetermined position of the stencil printing machine 600. The stencil printing machine 600 includes a frame 601
A printing drum 5 supported on the outer peripheral surface and having a stencil master 1 wound therearound and rotating around a rotation center axis 6; an ink supply device 60 for supplying ink to the inner peripheral surface of the printing drum 5; Roll supporting means 175 for supporting a plate roll 2 for supplying the master 1 to the printing drum 5 around one end of which is rotatable with respect to the printing drum 5 around the same axis as the rotation center axis 6. A plate-feeding unit 170 having plate-feed roll supporting means 175, and a plate-making means for plate-making the master 1 supported on the main body side of the stencil type stencil printing apparatus 600 (hereinafter simply referred to as "printing apparatus main body side"). A thermal discharge head 4 and plate discharge roll support means 185 for supporting a plate discharge roll 10 having the winding shaft 9 for winding the used master 1b around the printing drum 5 around the other end of the master 1; Is rotatable relative to the printing around the same axis and the rotational axis 6 drum 5 and the plate feed unit 170, the plate discharge unit 1 has a discharge plate roll support means 185
80 mainly.

The plate feeding unit 170 is described later.
It mainly includes a pair of plate feeding arms 7a and 7b, a plate feeding roll 2, plate feeding roll support means 175, a plate feeding friction clutch 15, a platen roller 3, a platen roller clutch 29, a drive shaft 27 and a gear 30. The plate discharging unit 180
A plate discharging arm pair 8a, 8b, a plate discharging roll 10, which will be described later,
Plate discharging roll supporting means 185 and plate discharging friction clutch 16
Mainly composed of

The printing drum 5 and the plate feeding unit 17
The plate discharging unit 180 and the ink supply device 60 constitute a drum unit 70. The drum unit 70 is detachable from the printing apparatus main body via a frame 601 by a detachable mechanism (not shown).

Hereinafter, the printing drum 5 and the ink supply device 6
0, each component of plate feeding unit 170, plate discharging unit 1
The components 80 and the configuration of the thermal head 4 will be sequentially described.

In FIG. 3, on the outer periphery of the printing drum 5,
A support cylinder 5a having a large number of fine holes 5h with ink passage throughout the entire periphery except for both side edges is provided, and the ink passage on the outer peripheral surface of the support cylinder 5a is provided. A mesh screen 5b is wound. Accordingly, the ink supplied from the ink supply device 60 disposed inside the printing drum 5 to the inner peripheral surface thereof can pass through the entire circumference of the support cylinder 5a.

In FIGS. 2 and 3, both ends of the support cylinder 5a and the mesh screen 5b are connected to a disc-shaped drum flange portion 12 which is disposed so as to sandwich these both ends.
a, 12b. The printing drum 5 is rotatably supported by a rotation center shaft 6 via a bearing 14 on drum shafts 13a and 13b formed integrally with the center bases of the drum flange portions 12a and 12b, respectively. It is driven in the direction of the double arrow by the driving means 100.

A pair of plate feeding arms 7a, 7b are provided on both drum shafts 13a, 13b with the printing drum 5 interposed therebetween.
A pair of plate discharging arms 8a, 8b (hereinafter, referred to as “plate discharging arm pairs 8a, 8b”) are respectively provided on the outer sides thereof through bearings (not shown). 6 is rotatably disposed. The base of the plate feeding arm 7b is connected to the drum shaft 13b via a plate feeding friction clutch 15, and the base of the plate discharging arm 8b is connected to the drum shaft 13b via a plate discharging friction clutch 16. A drum gear 17 is formed integrally with one end of the drum shaft 13b. Friction clutch 15 for plate feeding
As will be described later, the plate feed arm 7b and the drum shaft 13b are connected and rotated integrally during the initial setting and printing of the unused plate feed roll 2U, while the plate feed arm is used during plate making and plate discharging. 7b and the drum shaft 13b are disconnected from each other. The plate discharging friction clutch 16
As will be described later, the plate discharge arm 8b and the drum shaft 13b are connected and rotated integrally during printing, while the plate discharge arm 8b and the drum shaft 13b are disconnected during plate making and plate discharge. ing. The plate feeding friction clutch 15 and the plate discharging friction clutch 16 are manually disengaged for manual operation in the event of a jam. A drive motor (not shown) fixed to a side plate (not shown) of the printing apparatus main body and connected to one end of a drum drive shaft 18 is provided outside the drum gear 17. Drum drive shaft 1
The other end of the drive gear 8 is fixedly provided with a drive gear 19 having a tooth portion that meshes with the drum gear 17 when the drum unit 70 is mounted. As described above, the drum driving unit 100 includes a driving motor (not shown), the drum driving shaft 18 and the driving gear 1.
9 is comprised.

In FIG. 3, the rotation center shaft 6 is provided at the base side of each of the plate feeding arms 7a and 7b and each of the plate discharging arms 8a and 8b.
To maintain rotational balance in a symmetrical position via
Balancer weights 75A and 75B made of material of relative importance
Is fixed. Balancer weight 75A, 75B
Is a plate feeding arm pair 7a, 7b and a plate discharging arm pair 8a, 8
They are arranged so as not to interfere when b rotates.
The balancer weights 75A and 75B have a substantially fan shape, and the size and weight are set so as to be balanced with the rotational moment components of the plate feeding unit 170 and the plate discharging unit 180 with respect to the rotation center shaft 6. As described later, particularly in the printing process, the printing drum 5 and the plate feeding unit 17 are used.
0 and the plate discharging unit 180 rotate at a high speed integrally. At this time, as described above, the balancer weight 75
Since the A and 75B are provided, as a whole of these integrated objects, the rotation balance is improved and the load fluctuation during rotation is reduced, so that more stable high-speed printing can be performed. The balancer weights 75A and 75B are
3 and 28 are shown only, and are omitted in other drawings for simplification.

In FIG. 1, an ink supply device 60 is provided inside the printing drum 5, and supplies ink to the inner peripheral surface of the printing drum 5, that is, the inner peripheral surface of the support cylinder 5a. A doctor roller 22, which is arranged in parallel with the roller 20 with a small gap therebetween and forms an ink reservoir 21 between the roller 20 and the ink roller 20, also serves as a rotation center shaft 6 of the printing drum 5 and supplies ink to the ink reservoir 21. And an ink supply pipe 6.

The printing drum 5 facing the ink roller 20
A press roller 11 is rotatably provided around a shaft 11s near the lower part of the outer peripheral surface of the press roller. The shaft 11s is supported by a pair of arms 23 disposed at both ends of the shaft.
These arms 23 are swingably supported around a shaft 23s attached to a side plate (not shown) of the printing apparatus main body. The press roller 11 has a printing position where the printing plate 5 is pressed against the printing drum 5 via the printing paper P during printing, and a plate discharging state in which the unused plate feeding roll 2U and the used master 1b are completely wound up when not printing. In order to avoid contact with the roll 10 (indicated by a phantom line in the figure) or the like, a non-printing position separated from the outer peripheral surface of the printing drum 5 is selectively occupied. In the vicinity of the left side of the shaft 23s in the drawing, a pair of upper and lower feed rollers 24a and 24b for transporting the printing paper P fed from the upstream side by paper transporting means (not shown) between the printing drum 5 and the press roller 11 Are arranged. A pair of upper and lower guide plates 25a and 25b for guiding the printing paper P between the printing drum 5 and the press roller 11 are arranged above and below the nip portion of the feed roller pair 24a and 24b.

In FIG. 1, FIG. 2 and FIG.
Is made of only a very thin thermoplastic resin film having a thickness of 3.5 μm, and is wound around a small diameter core tube 2 s of the plate feed roll 2 in a continuous sheet form. An antistatic agent is applied to the contact surface of the master 1 with the thermal head 4. Here, the master for stencil substantially consisting only of a thermoplastic resin film is not only a master made of only a thermoplastic resin film, but also a thermoplastic resin film containing a trace component such as an antistatic agent. Further, it includes one or more thin film layers such as an overcoat layer formed on both main surfaces of the thermoplastic resin film, that is, at least one of the front surface and the back surface.

At the free ends of the plate feeding arm pairs 7a and 7b,
U-shaped attachment / detachment grooves 7h for attaching / detaching the plate feeding roll 2 or the unused plate feeding roll 2U are formed respectively.
Each mounting groove 7h is provided with a brake unit 26 for applying a predetermined braking force to the core tube 2s at each end of the plate feeding roll 2, and the plate feeding roll 2 is provided via the core tube 2s at both ends. And can be rotated by both brake units 26, and
It is detachably supported and has a plate feeding arm pair 7a,
It is supported so that it does not come off from the brake unit 26 due to its inertia when the 7b rotates. Therefore,
A predetermined braking force is always applied to the core pipes 2s at both ends of the plate feeding roll 2, and a constant tension always acts on the master 1 pulled out from the plate feeding roll 2. The outer diameter of the plate feeding roll 2 is significantly smaller than that of the conventional one.

As described above, the plate feeding roll supporting means 175
Is composed of a detachable groove 7h and a brake unit 26.

A master 1 supplied from the plate supply roll 2 is supplied to the plate supply arm pair 7a, 7b near the plate supply roll 2 support portion.
A platen roller 3 that winds the sheet around a part of its own peripheral surface and conveys the sheet is attached to a shaft 3s rotatably supported by the plate feeding arm pairs 7a and 7b. The platen roller 3
It is made of an antistatic material made of synthetic rubber having a JIS hardness of A40 ° and is provided so as to extend in the axial direction parallel to the rotation center axis 6.

2 and 8, the platen roller 3
One end of the shaft 3s of the pulse motor 2
8 through a platen roller clutch 29 for obtaining the rotational driving force from the motor 8 and cutting off the driving force during printing.
7 is connected to one end. A gear 30 is attached to the other end of the drive shaft 27. A DC motor (not shown) connected to a rotary drive shaft 32s is provided on a side plate (not shown) on the printing apparatus main body side.
The plate cam 32 is attached to s. Further, a cam follower bracket 33 with a roller 33a that is in sliding contact with the contour peripheral surface of the cam 32 is provided near the cam 32 on the printing apparatus main body side.

The cam follower bracket 33 has a shape in which an arm protrudes from a triangular plate, and one end of the triangular portion forms a mounting portion for the roller 33a.
At 3s, it is pivotally attached to a side plate (not shown). Further, the protruding arm-shaped free end of the cam follower bracket 33 is given a rotating behavior in the counterclockwise direction in the figure by a tension spring 34 locked on a side plate (not shown). Also,
At one end of the protruding arm of the cam follower bracket 33, a pulse motor 28 fixed to the rotary drive shaft 31s and having a gear 31 that meshes with a gear 30 at a predetermined time described later is attached.

The plate discharging arm pairs 8a and 8b are shown in FIGS.
In the plate feeding position shown in FIG. 7, as shown in FIG. 7, the plate discharging arm locking means 35 is positioned and locked. The plate discharging arm locking means 35 includes a solenoid 37 provided on a side plate 39 on the printing apparatus main body side and having a guide pin 36 protruding in a direction parallel to the rotation center axis 6 (shown in FIG. 1), and a plate discharging arm. A lock hole 38 is provided at the upper portion of the upper portion 8a so that the guide pin 36 can protrude and fit therewith.

As shown in FIGS. 1 and 4 to 6, the plate feeding arm pairs 7a and 7b and the plate discharging arm pairs 8a and 8b are integrally connected by a plate feeding / discharging arm joining means 40 at a plate feeding position and the like. It has become so. The plate supply / discharge arm joining means 40 includes a locking pin 41 implanted at a predetermined position of the plate supply arm 7b and a shaft 4 at a predetermined position of the plate discharge arm 8b.
A locking lever 4 pivotally mounted at 3 and having a fitting groove 45h formed at one end thereof for engaging with the locking pin 41 at a predetermined time.
5, a solenoid 46 fixed to a predetermined position of the plate discharging arm 8b and rotatably connected to the other end of the locking lever 45 by a plunger 46p, and the vicinity of one end of the locking lever 45 and the plate discharging arm. Pin 8p planted at a predetermined position of 8b
And the fitting groove 4 of the locking lever 45 in the figure.
It comprises a joining spring 42 for urging the 5h portion in a counterclockwise direction, and a stopper 44 implanted at a predetermined position of the plate discharging arm 8b to stop the other end of the locking lever 45. The locking lever 45 is made of sheet metal and has a substantially L-shape.

In FIGS. 1 and 4, a DC motor (not shown) connected to a drive shaft 47s integrally mounted with a plate cam 47 is fixed to a side plate (not shown) on the printing apparatus main body side. In the vicinity of the cam 47, a shaft 48s is pivotally attached to a side plate (not shown) on the printing apparatus main body side.
A cam follower arm 48 with a roller 48a that is in sliding contact with the contour peripheral surface of the cam 47 is provided. At the base end of the cam follower arm 48, a mounting portion for a roller 48a is formed, and at its free end, a thermal head 4 provided to extend in a direction parallel to the axis 3s of the platen roller 3 is mounted. . The roller 4 of the cam follower arm 48
Between the mounting portion 8a and the shaft 48s, the other end of a tension coil spring 49, one end of which is locked to a side plate (not shown) of the printing apparatus main body, is locked. Is given a rotation behavior in the counterclockwise direction in the figure. The thermal head 4 has a known configuration in which a number of fine heating elements are arranged in a line in a direction orthogonal to the sub-scanning conveyance direction of the master 1, that is, in the main scanning direction.

Reference numeral 50 denotes a plate making position (indicated by an imaginary line in the figure) for bringing the thermal head 4 into contact with the platen roller 3 via the master 1 during plate making, and a non-plate making position (shown in FIG. (Shown by a solid line) indicates a thermal head contact / separation means for selectively displacing the thermal head. As described above, the thermal head contacting / separating means 50 mainly includes a DC motor (not shown), a cam 47, a cam follower arm 48, a spring 49, and the thermal head 4.

Next, components of the plate discharging unit 180 will be described. 2 and FIG.
The take-up shaft 9 of 0 has a round bar shape, and the other end of the master 1 unwound from the plate feed roll 2 is previously adhered and wound. A notch groove 82 is formed at one end of the winding shaft 9.

The free end of the plate discharging arm 8a is formed of a pipe material, and is fitted to a notch groove 82 of the take-up shaft 9 of the plate discharging roll 10 to support one end of the plate discharging roll 10. A roll drive shaft 81 having an engagement projection 83 projecting in a direction perpendicular to the direction is provided rotatably. The gear 51 is fixed to the shaft end of the roll drive shaft 81. on the other hand,
The free end of the plate discharge arm 8b is formed of a pipe material, and is parallel to the rotation center axis 6 for supporting the other end of the plate discharge roll 10 by fitting the winding shaft 9 of the plate discharge roll 10 LR in the figure.
A slide shaft 84 slidable in the direction is provided. The plate discharging roll 10 has a notch groove 82 on one end side of the winding shaft 9 fitted with the engaging projection 83 of the roll driving shaft 81 between the plate discharging arm 8a and the plate discharging arm 8b. The other end is fitted into the slide shaft 84 so that the other end is rotatable about the roll drive shaft 81 and the slide shaft 84.

As described above, the plate discharging roll supporting means 185
Is mainly composed of a roll drive shaft 81 and a slide shaft 84.

The winding shaft 9 is made of PPS having a porous structure.
It is made of an ink absorbing member 87 made of (polyphenylene sulfide) resin, and 30% by volume of glass fiber is mixed into the ink absorbing member 87 in order to increase material strength. The content of this glass fiber increases as the material strength increases, but if the content is too large, the pores of the porous structure will be closed, while if the content is too small, the material strength is weak. As a result, problems such as an increase in deformability and breakage occur. Therefore, a desirable glass content is 10 to 40% by volume, particularly preferably 2 to 40% by volume.
0 to 30% by volume. As the ink absorbing member 87, for example, Sunfine AQ which is a hydrophilic functional resin porous material using a special polyolefin powder is used.
(Trade name: manufactured by Asahi Kasei Corporation) can be used. This Sunfine AQ absorbs ink by capillary action due to its porous structure.

The roll drive shaft 81 and the slide shaft 8
At the free ends of the plate discharge arm pairs 8a and 8b near the plate 4, a brake unit (not shown) for preventing the roll drive shaft 81 and the slide shaft 84 from loosening in the direction opposite to the winding direction is provided, which will be described later. When the master 1 is mounted on the outer peripheral surface of the printing drum 5, a braking force that does not loosen is applied. When the used master 1b becomes full, the plate discharge roll 10 is set as a so-called disposable specification that is replaced with a set of an unused plate supply roll and an unused plate discharge roll. In the sectional view of the winding shaft, the porous structure is shown in a satin pattern unless otherwise specified.

In FIG. 4, reference numeral 80 denotes a plate discharging roll 1
2 shows a plate discharge roll driving unit that rotationally drives 0. A plate discharge winding motor 56 is fixed to a side plate (not shown) of the printing apparatus main body. A gear 58 is fixed to the rotation output shaft 57 of the plate discharge winding motor 56. Next to the gear 58, a shaft 61 held at a predetermined interval by a connecting arm 59 is provided.
A gear 61 rotatably supported around s and constantly meshing with the gear 58 is provided.

The swing operation of the connecting arm 59 for meshing or releasing the meshing of the gear 51 and the gear 61 at a predetermined operation timing described later depends on the positional relationship among the rotation output shaft 57, the shaft 61s, and the roll drive shaft 81. A semi-straight line connecting the rotation output shaft 57 and the shaft 61s, and the roll drive shaft 81 and the shaft 61s.
Is set so as to be substantially a right angle or an obtuse angle larger than that, so that the rotation can be performed only by rotating the gear 58 by the rotation of the plate discharge winding motor 56. That is, at the start of plate making described later, when the gear 58 of the plate discharging take-up motor 56 rotates in the direction of arrow A in the figure, the gear 61 is connected to the gear 51 via the connecting arm 59 under the action of the rotating moment of the gear. It swings in the approaching direction and meshes with the gear 51, and the plate discharge winding motor 5
6 is transmitted to the roll drive shaft 81. On the other hand, at the end of plate making, the gear 58 of the plate discharging take-up motor 56 is slightly reversely rotated in the direction opposite to the arrow A direction in the figure, so that the gear 61 is moved away from the gear 51 via the connecting arm 59. Oscillates and disengages with the gear 51.

As described above, the plate discharging roll driving means 80
Is mainly composed of a plate discharge winding motor 56, a gear 58, a connecting arm 59 and a gear 61.

Next, the operation of the stencil printing machine will be described below with reference to FIGS. 14 to 19, the plate discharge arm locking means 35, the gear 51, the roll drive shaft 81, the brake unit 26, the plate supply / discharge arm joining means 40, and the thermal head contact / separation means 50
Detailed components such as the plate discharge roll driving means 80 and the like are omitted as needed to simplify the description. First,
In FIG. 14, at the time of initial setting in which the unused plate supply roll 2U is set on the plate supply arm pair 7a, 7b, the drum unit 70 is removed from the printing apparatus main body (not shown), and the unused plate supply roll 2U and the unused plate discharge are performed. Roll 10
Of the set of U, an unused plate discharging roll 10U is set on a roll driving shaft and a slide shaft (not shown) of the plate discharging arm pair 8a, 8b, and the leading end of the master 1 is placed on the platen roller 3.
And the unused plate supply roll 2U is set on the plate supply arm pair 7a, 7b via the brake unit 26. Thereafter, the drum unit 70 is mounted on a printing apparatus main body (not shown). At this time, the thermal head 4 and the press roller 11, which are supported on the printing apparatus main body (not shown), are separated from the drum unit 70 by the above-described units, so that troubles such as interference do not occur. The plate discharging arm pair 8a, 8b is a plate discharging arm locking means 3
5 (shown in FIG. 7) is locked at the plate feeding position shown in FIG. That is, in FIG. 7, when the solenoid 37 is turned on, the locking holes 3 of the plate discharging arm 8a are turned on.
When the guide pin 36 is fitted into 8 and the solenoid 37 is turned off, the locked state is released. In the following operation, description of the operation of locking and unlocking the plate discharging arm pair 8a, 8b by the plate discharging arm locking means 35 will be omitted.

Next, the printing drum 5 and the plate feeding arm pair 8a, 8b are kept at the plate feeding position shown in FIG. 2 by the driving force supplied from the drum driving means 100 (shown in FIG. 2). 7a and 7b are integrally rotated in the direction of arrow A, and the master 1 is wound around the outer peripheral surface of the printing drum 5. At this time, the plate discharging arm pair 8a, 8b is disconnected from the printing drum 5 by the plate discharging friction clutch 16 (shown in FIG. 3) and occupies the plate feeding position. 7b is a plate feed friction clutch 15 (FIG. 3)
) Is connected to the printing drum 5. A brake unit 26 is provided on the core tube 2s of the plate feeding roll 2.
, A predetermined tension is applied to the master 1 pulled out from the plate feeding roll 2, and the master 1 can be wound around the outer peripheral surface of the printing drum 5 without generating wrinkles.

Next, referring to FIG.
a, 7b and the plate discharging arm pair 8a, 8b are integrally connected by a plate feeding / discharging arm joining means 40. That is,
In FIG. 6, when the plate feeding arm 7b is rotated in the direction of arrow A to the vicinity of the plate feeding position, the locking pin 41 and the sliding contact guide portion 45a slidably contact with each other, so that the locking pin 41 is fitted into the fitting groove 45h. Are fitted, and the plate feeding arm pairs 7a and 7b and the plate discharging arm pairs 8a and 8b are integrally connected. This is the preparation process before plate making. In addition, the plate feeding arm pair 7a, 7b
When the coupling state between the plate discharging arm pair 8a and 8b is released, the plunger 4 is turned on by turning on the solenoid 46.
Through the 6p suction operation, the fitting groove 45h is rotated in the direction of arrow A, and the fitting between the fitting groove 45h and the locking pin 41 is released.

Next, in FIG. 16, plate making and plate discharging are performed simultaneously. When a plate making start key (not shown) is turned on, first, the thermal head 4 is moved to the platen roller 3 via the master 1 by the operation of the thermal head contact / separation means 50 (shown in FIG. 4) on the plate feeding arm pair 7a, 7b. It is displaced to the abutting plate making position. That is, as shown in FIG. 4, the cam 47 is rotated by the rotation of a DC motor (not shown), and the cam follower arm 48 is rotated in the direction of arrow D by the urging force of the spring 49, so that the heating element of the thermal head 4 is heated. Is pressed against the platen roller 3 via the master 1.

On the other hand, at the same time as the above operation,
4 and FIG. 16, the operation of the plate discharging roll driving means 80 causes the gear 5 for the plate discharging roll to operate.
1, the gear 61 and the gear 58 are meshed. In this state, the plate making is performed by rotating the cam 32 in the direction of arrow B in the figure by rotating a DC motor (not shown) in FIG.
The gear 31 is rotated about 3 s, and the gear 31 meshes with the gear 30. At this time, when the pulse motor 28 is rotationally driven, the gear 30 and the platen roller 3 are rotated in the direction of arrow B in the figure, and the master 1 is conveyed while being sequentially pulled out from the plate feeding roll 2 and is not shown. According to the image information read from the document reading device,
The heating element of the thermal head 4 selectively generates heat and the master 1
Are perforated sequentially from the leading end of the plate to perform plate making.

Simultaneously with the plate making operation, only the printing drum 5 is driven by the driving force supplied from the drum driving means 100 (shown in FIG. 2) provided on the printing apparatus main body side in the direction of arrow B in FIG. Is rotated at a speed synchronized with the peripheral speed of the printing drum 5, and the plate-making master 1a is wound around the outer peripheral surface of the printing drum 5. At this time, the plate discharging friction clutch 16 (shown in FIG. 3) of the plate discharging arm pair 8a, 8b and the plate feeding friction clutch 15 (shown in FIG. 3) of the plate feeding arm pair 7a, 7b.
Are disconnected from the printing drum 5. 2, the platen roller 3 is connected to the drive shaft 27 by a clutch 29 in order to obtain a driving force from the drive shaft 27 on the printing apparatus main body side. The peripheral speed of the printing drum 5 is set to be slightly higher than the peripheral speed of the platen roller 3 in order to apply an appropriate tension to the plate-making master 1 a supplied from the platen roller 3 and wind the master 1 a around the printing drum 5. I have.

In parallel with the plate making operation, in FIG. 4, the plate discharging roll driving means 80 operates. That is, the rotation of the plate discharging take-up motor 56 causes the roll drive shaft 81 to rotate.
The winding shaft 9 is rotated in the direction of arrow A, and the used master 1b having a predetermined length (for one plate) is wound around the winding shaft 9 in a roll shape.

After the completion of plate making, in FIG. 17, the thermal head 4 is separated from the platen roller 3 in the direction of arrow U via the master 1 by the operation of the thermal head contact / separation means 50, while the platen roller 3 is The drive shaft 27 (shown in FIG. 2) of the plate-type plate making and printing apparatus
9 (shown in FIG. 2) disconnects the connection and stops its rotation. At the same time, the plate discharge winding motor 56
By stopping the driving (shown in FIG. 4), the rotation of the plate discharge roll 10 is stopped, and the plate discharging position is the same as the plate feeding position in FIG.

Next, from the state of FIG. 17, the plate supply arm pair 7a, 7b, the plate discharge arm pair 8a, 8b and the printing drum 5
Are integrated, that is, a plate discharging friction clutch 16 (shown in FIG. 3) of the plate discharging arm pair 8a, 8b and a plate feeding friction clutch 15 (shown in FIG. 3) of the plate feeding arm pair 7a, 7b.
Are rotated in a state in which they are connected to the printing drum 5 until they reach the position shown in FIG.

In FIG. 18, the printing process is started, and the printing paper P loaded on a paper feed table (not shown) is fed by a paper transport means (not shown) to a pair of feed rollers 24a and 24a.
b (shown in FIG. 1), and further sent between the outer peripheral surface of the printing drum 5 and the press roller 11 at a predetermined timing synchronized with the rotation of the printing drum 5 by a pair of feed rollers 24a and 24b. . Then, the press roller 11, which has been separated downward from the outer peripheral surface of the printing drum 5, moves upward by the swing of the arm 23 (shown in FIG. 1), and rotates in the direction of arrow B in FIG. The printing paper P is transferred to the plate-making master 1a wound on the outer peripheral surface of the printing drum 5 to be printed.
Is pressed, the ink is transferred from the perforated portion of the plate-making master 1a to the surface of the printing paper P.

At this time, the ink roller 20 (shown in FIG. 1) also rotates in the same direction as the rotation direction of the printing drum 5,
The ink is supplied to the inner peripheral surface of the printing drum 5. After the printing paper P printed in this way passes the press roller 11, the printing drum 5
The sheet is peeled from the outer peripheral surface of the sheet and is discharged and stacked on a sheet discharge table (both not shown) by the sheet discharge conveying means. After the printing process shown in FIG. 18, the plate feeding arm pair 7 as shown in FIG.
a, 7b and the plate discharging arm pair 8a, 8b
When approaching 1, the press roller 11 is separated from the printing drum 5 so as not to interfere with the plate feeding roll 2, the plate discharging roll 10, and the like. Subsequent steps of plate making, plate discharging, and printing are repeated again from the state of FIG.

As described above, as the operations of the plate making / discharging, plate feeding, and printing processes are repeated, as shown in FIG. 11, the ink k1 adhered to the used master 1b at the time of plate discharging is removed. Used master 1b wound on winding shaft 9
Oozes out from both ends of the winding part. This ink k1
As shown in FIG. 12, the ink penetrates into a large number of pores of the porous structure of the ink absorbing member 87 at a relatively high speed and is absorbed, and finally, as shown in FIG.
1 is an absorbing ink k2 that has been absorbed into the winding shaft 9 and absorbed.
Becomes Therefore, the ink k1 does not leak from both ends of the winding portion of the used master 1b wound around the winding shaft 9.

The ink k1 shown in FIG. 11 is immediately supplied to the winding shaft 9 by the porous structure of the ink absorbing member 87.
Since it permeates into the inside, it does not accumulate on the winding shaft 9 corresponding to the winding portion of the used master 1b, but is exaggerated for better explanation of the operation.

(Embodiment 2) FIG. 20 shows Embodiment 2 of the present invention. The second embodiment is different from the first embodiment only in having a plate discharging roll 10A having a winding shaft 9A instead of the winding shaft 9 of the plate discharging roll 10 of the first embodiment. The winding shaft 9A has a pore diameter h of the porous structure, and the used master 1b wound around the winding shaft 9A.
Made of an ink absorbing member 87A made of PPS (polyphenylene sulfide) resin, which is formed so as to become larger inward and outward from both ends of the winding portion, and glass fiber 30 is contained in the ink absorbing member 87A.
% By volume. That is, the winding shaft 9A has a hole diameter h1 at the winding portion of the used master 1b, a hole diameter h3 at both ends of the winding shaft 9A and the central portion of the winding portion of the used master 1b, and a used master 1b. H3>h2>, where h2 is the hole diameter between the both ends of the winding portion of FIG. 7A and the end of the winding shaft 9A or the vicinity of the center of the winding portion of the used master 1b.
It is formed of an ink absorbing member 87A having a porous structure of h1.

Next, the operation of the second embodiment will be described, focusing only on the differences from the first embodiment. The ink that has oozed from both ends of the winding portion of the used master 1b penetrates into a large number of pores of the porous structure of the ink-absorbing member 87A of the winding shaft 9A. Therefore, the permeated ink moves sequentially from h1 to h2 to h3 having a large pore diameter. Therefore, according to the second embodiment, the ink oozing out from both ends of the winding portion of the used master 1b does not leak from both ends of the winding portion of the used master 1b wound around the winding shaft 9A, and the used ink does not leak. There is an advantage that the porous portions at both ends of the wound portion of the finished master 1b can be maintained in a state where the ink is easily permeated.

FIG. 21 shows a modification of the second embodiment. This modified embodiment has a plate discharging roll 10B provided with a winding shaft 9B instead of the winding shaft 9A of the plate discharging roll 10A of the second embodiment, and the plate discharging roll supporting means 185 of the second embodiment.
The only difference is that a plate discharging roll supporting means 185A is provided instead of the plate discharging roll supporting means 185A. The winding shaft 9B winds the used master 1b on a pipe 85 made of stainless steel, and rolls the ink-absorbing member 87A on the pipe 85 at a portion excluding the winding portion of the used master 1b. It is integrally molded. A gap 86 is provided between each inner end of the ink absorbing member 87A and each end of the winding portion of the used master 1b as a margin for winding the used master 1b. A notch groove 82B is formed at one end of the winding shaft 9B, as shown in FIG.

Next, the plate discharging arm 10B is transferred to the plate discharging arm 10B.
The attachment / detachment structure at the time of setting at a and 8b will be described.
In FIG. 10, a free end of the plate discharging arm 8a is fitted in a notch groove 82B of the winding shaft 9B to support one end of the plate discharging roll 10B and protrudes in a direction perpendicular to the shaft. A roll drive shaft 81B having a mating projection 83B is rotatably provided. A gear 51 is fixed to the shaft end of the roll drive shaft 81B. At the free end of the plate discharging arm 8b, a slide shaft 84B that is slidable in the LR direction in the drawing in parallel with the rotation center axis 6 for fitting into the winding shaft 9B and supporting the other end of the plate discharging roll 10B is supported. Is provided. The plate discharging roll 10B is provided between the plate discharging arm 8a and the plate discharging arm 8b so that the engaging projection 83B of the roll driving shaft 81B is fitted into the notch groove 82B on one end side of the winding shaft 9B.
By inserting the slide shaft 84B into the other end of B, it is arranged rotatably about the roll drive shaft 81B and the slide shaft 84B. As described above, the plate discharging roll supporting means 185A mainly includes the roll driving shaft 81B and the slide shaft 84B.

Next, the operation will be described. The ink oozing out from both ends of the take-up portion of the used master 1b passes through the gap 86, as in the second embodiment, in the many holes of the porous structure of the ink absorbing member 87A of the take-up shaft 9B. And the ink that has soaked into the ink has a large pore size.
It moves sequentially from 1 → h2 → h3. Therefore, according to this modified embodiment, the ink oozing out from both ends of the winding portion of the used master 1b does not leak from both ends of the winding portion of the used master 1b wound around the winding shaft 9B, Further, there is an advantage that the porous portion near the both ends of the winding portion of the used master 1b can be maintained in a state where the ink is easily permeated.

(Third Embodiment) FIG. 22 shows a third embodiment of the present invention. The third embodiment is different from the first embodiment only in that a plate discharging roll 10C having a winding shaft 9C is used instead of the winding shaft 9 of the plate discharging roll 10 of the first embodiment. The winding shaft 9C has a cross section
The only difference is that the used master 1b wound around the winding shaft 9C is formed to be larger outwardly from both ends of the winding portion. When the plate discharging roll 10C is set on the plate discharging arm pair 8a, 8b, the setting structure shown in FIG. 9 in which attachments are attached according to the shaft diameters at both ends thereof is applied mutatis mutandis.

Next, the operation will be described. Used master 1b
The ink that oozes out from both ends of the take-up portion permeates into a number of pores of the porous structure of the ink-absorbing member 87, and the density of the ink in the porous structure is constant. Until the saturated state is reached, it moves and diffuses in the direction indicated by the arrow in the drawing, that is, into the unsaturated state area where the diameter of the winding shaft 9C is large. Therefore, according to the third embodiment, the ink oozing from both ends of the winding portion of the used master 1b does not leak from both ends of the winding portion of the used master 1b wound around the winding shaft 9C. Furthermore, since the winding shaft 9C is located above the outer peripheral surface of the printing drum 5 and rotates together with the printing drum 5 during printing, the ink permeated into the ink absorbing member 87 is centrifuged by the centrifugal force at that time. There is an advantage that the ink can be easily collected in a direction away from both ends of the winding portion of the used master 1b, and the porous portion near both ends of the winding portion of the used master 1b can be kept in a state where the ink easily permeates.

FIG. 23 shows a modification of the third embodiment. This modified embodiment is different from the third embodiment only in that a plate discharging roll 10D having a winding shaft 9D is used instead of the winding shaft 9C of the plate discharging roll 10C. The take-up shaft 9D integrally forms an ink-absorbing member 87 on a stainless steel pipe 85, and cross-sections the ink-absorbing member 87 of the used master 1b wound around the take-up shaft 9D. The only difference is that the outer periphery of the ink absorbing member 87 is coated with a coating material 88 that is impermeable to ink. The coating material 88 is, for example, a polyester resin, and plays a role in preventing the ink absorbed by the ink absorbing member 87 from leaking to the outside due to centrifugal force during printing or the like. In addition, the coating material 88
An ink-impermeable material such as a polyvinyl chloride resin may be used. Also, a plate discharging roll 1 is attached to the plate discharging arm pair 8a, 8b.
When setting 0D, the setting structure shown in FIG. 10 is applied mutatis mutandis. The operation of this modified embodiment is substantially the same as that of the third embodiment and will not be described.

Fourth Embodiment FIGS. 24 to 30 show a fourth embodiment.
Is shown. In the fourth embodiment, a plate discharging roll 10E having a pipe-shaped winding shaft 9E made of synthetic resin is used in place of the winding shaft 9 of the plate discharging roll 10 of the first embodiment. The only difference is that ink suction bodies 90 as ink suction mechanisms are provided at both ends of a portion where the master 1b is wound.

The ink suction body 90 has a cylindrical shape and is made of synthetic resin. In the ink suction body 90,
A large number of ink suction holes 91 are formed in the end surface 90s facing each end of the used master 1b wound around the winding shaft 9E and the inner cylindrical portion 90i. Ink suction hole 91 in end face 90s
As shown in FIG. 26, the ink passage 92 is provided in a triple loop shape, is formed in a capillary shape elongated in the left-right direction in the figure, and is formed in a loop shape at the peripheral end of the ink suction hole 91. Is in communication with On the other hand, the inner cylindrical portion 90
The ink suction hole 91 of i is elongated in a radial manner with the inner cylindrical portion 90i as a center, is formed in a capillary shape, and has an ink passage 92 formed in a circular shape at the peripheral end of the ink suction hole 91.
Is in communication with An ink collecting passage 93 is formed at a lower portion of the ink suction body 90, and each ink passage 92 joins the ink collecting passage 93. A suction pipe 94 is connected to the outlet of the ink collecting passage 93, and the many ink suction holes 91 communicate with an ink absorbing device 95 described later via the ink suction pipe 94.

In FIG. 30, at one end of the winding shaft 9E,
A notch groove 82B for engaging with the engagement projection 83B of the roll drive shaft 81B is formed.

As shown in FIGS. 24 and 30, an ink suction body guide tube 96 having an outer diameter slightly larger than the outer diameter of the take-up shaft 9E is fixedly provided above each plate discharging arm pair 8a, 8b. The ink suction body 90 slides the inner cylinder portion 90i on the ink suction body guide tube 96 and the take-up shaft 9E to thereby set a detachable set position of the plate discharge roll 10E indicated by a solid line and a plate discharge indicated by an imaginary line. It can be moved between the roll 10E and the mounting position. The ink suction body 90 is fixed on the ink suction body guide pipe 96 by a not-shown locking means at a position where the ink suction pipe 94 comes to the lowermost position at the mounting position of the plate discharging roll 10E. In addition, at the mounting position of the plate discharging roll 10E, the ink suction body 90 also serves as a winding guide for winding the used master 1b around the winding shaft 9E.

Referring to FIGS. 28 and 29, the ink absorbing device 95 drives the ink pump mechanism 101 and the ink pump mechanism 101 for sucking and driving the ink absorbed by the ink suction body 90 and returning the ink to the inner peripheral surface of the printing drum 5. It is mainly composed of an ink guide passage group 120 as a passage for conveying ink.

The ink pump mechanism 101 includes a cylinder 10
4, a suction ink pump 107 including a piston 105 and a connecting rod 106, a suction block 102 fixed to the ink supply pipe 6, a pump gear shaft 103 having one end fixed to the suction block 102, Pump gear 108 rotatably supported on pump gear shaft 103
And the pump gear 1 integrally formed at one end of the drum shaft 13a.
08 and a drum gear 109 that meshes.

The ink guide passage group 120 includes the cylinder 10
4 An ink discharge port 121 opened on the side wall and one end thereof is connected to an ink inlet 1 provided on one end face of the cylinder 104.
22 and a pump shaft 123 connected to the drum shaft 1
3a, an arc-shaped suction port 124 opened in the suction block 102 for communicating with a predetermined timing with a discharge port 125o on one end side of the drum shaft path 125, and a drum shaft. O-ring 126 for ink sealing provided at the entrance on the other end side of passage 125
And a joint 127 whose one end is connected to the ink suction pipe 94 and whose other end is connected to the inlet of the drum shaft passage 125.

The suction port 124 is connected to the drum shaft passage 12.
5 is formed sufficiently larger than the discharge port 125o,
The discharge port 125o of the drum shaft passage 125 is rotated together with the rotation of the drum shaft 13a.
07 performs the ink suction operation.
Communicates with the suction port 124, while the suction ink pump 10
The timing is set such that the ejection port 125o is not communicated with the suction port 124 when the ink 7 extrudes the ink.

Next, only the operation different from the first embodiment will be described. During printing, the suction ink pump 107 is constantly driven by suction by rotating the drum shaft 13a and the printing drum 5. As a result, the ink that has oozed from both ends of the winding portion of the used master 1 b is sucked from the ink suction holes 91 of the ink suction body 90, and from the ink suction pipe 94 via the ink guide passage group 120 to the cylinder 104. The ink is returned from the ink discharge port 121 to the inner peripheral surface of the printing drum 5. Therefore, according to the fourth embodiment, there is an advantage that ink can be saved.

When the apparatus is not driven, the ink suction body 9
0 is not subjected to the suction drive by the ink pump mechanism 101, but at the time of the above-described printing, the ink suction hole 91 of the ink suction body 90 is constantly sucked, so that there is almost no ink in the tube. Therefore, the ink suction body 90
However, even when the suction drive by the ink pump mechanism 101 is not performed, the ink oozing out from both ends of the wound portion of the used master 1b is naturally absorbed into the ink suction hole 91 by a capillary phenomenon.

Although the thickness of the master is 3.5 μm in each of the above embodiments, it can be used in a good condition even at a thickness of 2 to 10 μm. Further, in this embodiment, a master substantially composed of only a thermoplastic resin film was used. However, the present invention is not limited to this, and a conventional stencil master using Japanese paper or the like as a porous flexible support can also be used. Needless to say.

The ink-absorbing member is not limited to the above-described embodiment, and good results can be obtained by using PBT (polybutylene terephthalate), POM (polyacetal), liquid crystal polymer or the like as in the above-described embodiment.

The coating material used in the modified example of the third embodiment may be applied to the first to third embodiments.

The ink-absorbing members of the winding shaft described in the first to third embodiments and the modified examples are not limited to those of the above-described embodiment. Each may be made of an ink absorbing member. In other words, the portion other than the vicinity of both ends of the winding portion of the used master may be made of a material that is not an ink-absorbing member, for example, a metal or synthetic resin material.

The ink absorbing member 87A is not limited to being applied to the second embodiment and the modified example of the second embodiment.
The present invention may be applied to the third embodiment and a modification of the third embodiment.

According to the first and fifth aspects of the present invention, the plate feeding / discharging unit having the plate feeding roll supporting means and the plate discharging roll supporting means corresponds to the above-mentioned embodiment, that is, about the same axis as the rotation center axis 6. It is rotatable with respect to the printing drum 5 and has a plate feeding unit 170 having plate feeding roll supporting means 175 and is rotatable with respect to the printing drum 5 and the plate feeding unit 170 around the same axis as the rotation center axis 6. Plate discharging unit 1 having plate discharging roll support means 185
80, not only the plate feeding roller supporting means, the plate discharging roller supporting means, and the platen roller described in Japanese Patent Application No. 5-132164 already proposed by the present applicant, but also the rotation center axis of the printing drum and It also includes a plate feeding / discharging unit rotatable about the same axis with respect to the printing drum or a plate receiving / discharging unit described in Japanese Patent Publication No. 5-70595. The characteristic configuration described in the above embodiment or the modified embodiment may be applied mutatis mutandis.

[0081]

As described above, according to the first to fourth aspects of the present invention, the ink that oozes out onto the winding shaft of the plate discharge roll from both ends of the winding portion of the used master is absorbed by the ink absorbing material. Since the ink is absorbed by the members, ink does not leak from both ends of the used master winding part, so that the stencil type stencil that does not stain the printed matter or splatters on the mechanism around the printing device and breaks down A printing device can be provided.

According to the fifth aspect of the present invention, the ink that has oozed onto the take-up shaft of the plate discharging roll from both ends of the take-up portion of the used master is sucked by the ink suction mechanism. Since the ink does not leak from both ends of the take-up portion, a stencil type stencil printing apparatus can be provided that does not stain printed matter or splatters into a mechanism or the like around the printing apparatus to cause a failure.

According to the sixth aspect of the present invention, the winding shaft of the stencil roll used in a stencil type stencil printing machine which does not stain the printed matter or splatters on a mechanism or the like around the printing machine to cause a failure. Can be provided.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a stencil printing machine showing one embodiment of the present invention.

FIG. 2 is a plan view of a main part of FIG.

FIG. 3 is a sectional view of a main part around the drum unit of FIG. 2;

FIG. 4 is a side view of a main part around the plate feeding arm and the plate discharging arm of FIG. 1;

FIG. 5 is a plan view of a plate supply / discharge arm joining unit.

FIG. 6 is a side view of FIG. 5;

FIG. 7 is a sectional view of a main part showing a plate discharging arm locking means.

FIG. 8 is a partial cross-sectional side view of the platen roller driving unit of FIG.

FIG. 9 is a partial cross-sectional side view of the plate discharging roll and the attachment / detachment holding mechanism of the first embodiment.

FIG. 10 is a partial cross-sectional side view of a plate discharging roll and a detachable holding mechanism thereof according to a modification of the second embodiment.

FIG. 11 is a cross-sectional view illustrating a process of infiltrating ink into a winding shaft according to the first embodiment.

FIG. 12 is a cross-sectional view illustrating a process of infiltrating ink into a winding shaft according to the first embodiment.

FIG. 13 is a cross-sectional view illustrating a process of infiltrating ink into the winding shaft according to the first embodiment.

14 is a main part side view showing an operation when setting a master of an unused plate feed roll in the stencil printing machine of FIG. 1;

FIG. 15 is a main part side view showing a preparatory step before plate making in which a plate feeding arm and a plate discharging arm are integrally connected.

FIG. 16 is a side view of a main part showing operations during plate making and plate discharging.

FIG. 17 is a main part side view showing an operation at the end of plate making and plate discharging.

FIG. 18 is a side view of a main part showing an operation at the time of printing.

FIG. 19 is a main part side view showing an operation at the time of printing.

FIG. 20 is a sectional view of a main part of a plate discharging roll according to a second embodiment.

FIG. 21 is a sectional view of a main part of a plate discharging roll according to a modification of the second embodiment.

FIG. 22 is a sectional view of a main part of a plate discharging roll according to a third embodiment.

FIG. 23 is a sectional view of a main part of a plate discharging roll according to a modification of the third embodiment.

FIG. 24 is an external perspective view of a drum unit according to a fourth embodiment.

FIG. 25 is an external perspective view of an ink suction body according to a fourth embodiment.

FIG. 26 is a longitudinal sectional view of the ink suction body.

FIG. 27 is a sectional view taken along line XX of FIG. 26;

FIG. 28 is a sectional view of an ink absorbing device according to a fourth embodiment.

FIG. 29 is a partial cross-sectional front view of a suction ink pump according to a fourth embodiment.

FIG. 30 is a partial cross-sectional side view illustrating a detachable holding mechanism of a plate discharging roll 10E according to a fourth embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Master for stencil 1a Master-made master 1b Used master 2 Plate-supply roll 2U Unused plate-supply roll 3 Platen roller 4 Thermal head as plate-making means 5 Printing drum 6 Rotation center shaft 7a, 7b Plate-supply arm pair 8a, 8b Plate discharge arm pair 9, 9A, 9B, 9C, 9D, 9E Take-up shaft 10, 10A, 10B, 10C, 10D, 10E Plate discharge roll 87, 87A as plate discharge means Ink absorbing member 90 Ink suction body as ink suction mechanism

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B41L 13/00-13/14

Claims (6)

(57) [Claims] A stencil master wrapped around an outer peripheral surface thereof, the printing drum rotating around a rotation center axis; an ink supply device for supplying ink to an inner peripheral surface of the print drum; Plate supply roll supporting means for supporting a plate supply roll for supplying the master to the printing drum; and a plate discharge roll having a winding shaft around which the other end of the master is wound and a used master is wound from the printing drum. A plate-making roll supporting means for supporting the plate; a plate-making means for making the master; a plate-supplying roll supporting means and the plate-discharging roll rotatable with respect to the printing drum around the same axis as the rotation center axis. A stencil printing machine having a stencil feeding / discharging unit having support means, wherein the winding shaft is made of an ink-absorbing member. Location. 2. The stencil printing machine according to claim 1, wherein said ink-absorbing member has a porous structure, and the pore diameter of said porous member increases as the distance from both ends of the winding portion of said used master increases. A stencil type stencil printing machine characterized by being large. 3. The stencil printing machine according to claim 1, wherein the cross section of the winding shaft is larger as it goes outward from both ends of the winding portion of the used master. Plate-type stencil printing machine. 4. A stencil printing machine according to claim 1, wherein said ink-absorbing member is made of a resin mixed with glass fiber, and the mixed amount of glass fiber is 10 to 40% by volume. A stencil type stencil printing machine characterized by the following. 5. A printing drum which is wound around an outer peripheral surface thereof and which rotates around a rotation center axis, an ink supply device which supplies ink to an inner peripheral surface of said printing drum, and one end of said master is wound. Plate-supply roll supporting means for supporting a plate-supply roll for supplying the master to the printing drum; and a plate-discharge roll having a winding shaft around which the other end of the master is wound and for winding up the used master from the printing drum. A plate-making roll supporting means for supporting the plate; a plate-making means for making the master; a plate-supplying roll supporting means and the plate-discharging roll rotatable with respect to the printing drum around the same axis as the rotation center axis. A stencil type stencil printing machine comprising a stencil feeding / discharging unit having a support means, wherein an ink suction mechanism is provided at both ends of a portion of the winding shaft on which the used master is wound. Stencil type plate-making printing machine, characterized in that digit. 6. A printing drum that is wound around an outer peripheral surface thereof and is rotated around a rotation center axis, an ink supply device that supplies ink to an inner peripheral surface of the printing drum, and one end of the master is wound. Plate-supply roll supporting means for supporting a plate-supply roll for supplying the master to the printing drum; and a plate-discharge roll having a winding shaft around which the other end of the master is wound and for winding up the used master from the printing drum. A plate-making roll supporting means for supporting the plate; a plate-making means for making the master; a plate-supplying roll supporting means and the plate-discharging roll rotatable with respect to the printing drum around the same axis as the rotation center axis. A winding shaft for the stencil roll used in a stencil type stencil printing machine having a stencil feeding / discharging unit having a supporting means, wherein the winding shaft is made of an ink absorbing member. The take-up shaft of the plate discharge roll to.