JP3473796B2 - Ink absorption device for stencil type stencil printing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink absorbing device for a stencil type plate making and printing apparatus.

[0002]

2. Description of the Related Art As an ink absorbing device of a conventional stencil-type plate-making printing device, there is an application by the applicant of the present invention (Japanese Patent Application No. 331774). As shown in FIG. 15, this ink absorbing device serves as an ink absorbing means that abuts both ends of a portion on the shaft 9 of the plate discharge roll 10 on which the used master 1b is wound, and absorbs the ink attached to the used master 1b. A pair of ink absorption flanges 110, 110 (in the figure,
Only one is shown. ) Is provided, the ink absorbing flange 110 has a donut shape, and a fiber-based absorbent material having directionality in the overlapping of the fibers is provided between the length direction of the fibers and the direction of the shaft 9 of the plate discharge roll 10. It is composed of a paper pulp compression molding material formed so as to be substantially parallel. The outer diameter of the ink absorption flange 110 is formed to be equal to the outer diameter of the plate discharge roll 10 when the plate discharge roll 10 is full of the used master 1b, and both ends of the used master 1b wound around the shaft 9 are covered. It always comes into contact with.

[0003]

In the conventional ink absorbing device, the fiber-based absorbent material having the directionality in the overlapping of the fibers is provided on both sides of the used master 1b wound around the outer circumference of the plate discharge roll 10. Since the length of the fiber and the direction of the shaft 9 of the plate discharge roll 10 are made substantially parallel to each other, the ink is absorbed by the donut-shaped ink absorption flange 110 made of a paper pulp compression molding material. Used master 1b
The ink that has adhered to the plate and oozes onto the shaft 9 of the plate discharge roll 10 is gradually absorbed and cannot be absorbed quickly, and the leaked ink drips or scatters, and the ink stains the printing device. There is a problem.

[0004]

According to a first aspect of the present invention, a master for a stencil is wound around an outer peripheral surface of the printing drum to rotate around a rotation center axis, and ink is supplied to the inner peripheral surface of the printing drum. Ink supply means, a plate feed roll having one end of the master wound around to feed the master to the printing drum, plate making means for making the master, and the other end of the master wrapped around the used master to form the printing drum. In a stencil-type plate-making printing apparatus comprising: a plate discharge roll wound up from a roll, a roll supporting means that supports the plate supply roll and the plate discharge roll, and is rotatable with respect to the central axis of the printing drum, The outer periphery of the roll, in the vicinity of the side edge of the used master, a porous sheet-shaped substrate,
There is provided an ink absorbing device of a stencil-type plate-making printing device, characterized in that an ink absorbing means constituted by winding a porous sheet bent in a bellows shape is provided outside the sheet-shaped substrate.

According to a second aspect of the present invention, in the ink absorbing device of the stencil plate making and printing apparatus according to the first aspect, a pressing member for pushing the ink from the used master into the ink absorbing means is provided in the ink absorbing means. The ink absorbing device of a stencil-type plate-making printing device is characterized in that it is provided on the end face side on the master side.

According to a third aspect of the present invention, a printing drum having a master for stencil wound around an outer peripheral surface thereof and rotating around a central axis of rotation, an ink supplying means for supplying ink to the inner peripheral surface of the printing drum, A plate feed roll having one end of the master wound to supply the master to the printing drum, a plate making unit for making the master, and a plate discharge roll having the other end of the master wound to wind a used master from the printing drum. A roll supporting means that supports the plate supply roll and the plate discharge roll and is rotatable with respect to the central axis of the printing drum; and an outer periphery of the plate discharge roll, which is a side edge of the used master. In the vicinity of the porous sheet-shaped substrate, an ink absorbing means constituted by winding a porous sheet bent in a bellows shape on the outside of the sheet-shaped substrate, and the outside of the plate discharge roll. And a cover that covers the ink absorption means and is disposed so as to be fixed to the cover so as to contact the end surface side of the master side of the ink absorption means, and presses the ink from the used master into the ink absorption means. And an ink absorbing device of a stencil-type plate-making printing device including a member.

The invention of claim 4 relates to claim 1, 2 or 3
In the ink absorbing device of the stencil-type plate-making printing device described,
The ink absorbing device of a stencil-type plate making printing apparatus is characterized in that the ink absorbing means is subjected to a lipophilic treatment.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. First, a plate-making printing apparatus to which the present invention is applied will be described with reference to FIGS. 8 to 13. 8 to 13, reference numeral 350 indicates a stencil-type plate-making printing apparatus. Reference numeral 351 denotes a frame arranged at a predetermined position of the stencil plate making and printing apparatus 350. This stencil-type plate-making / printing apparatus 350 has a printing drum 5 supported by a frame 351 and having a master 1 for stencil wound around its outer peripheral surface and rotating around a rotation center axis 6, and an ink on the inner peripheral surface of the printing drum 5. And an ink supply means 60 for supplying the ink, and a plate feed supporting the core tube 2s of the plate feed roll 2 in which one end of the master 1 is wrapped around the core tube 2s serving as the plate feed roll axis to feed the master 1 to the printing drum 5. A plate discharge support that supports the roll shaft support means 175 and the winding shaft 9 of the plate discharge roll 10 that winds the used master 1b from the printing drum 5 by winding the other end of the master 1 around the winding shaft 9 as the plate discharge roll shaft. A roll shaft supporting means 185 and a plate feeding / discharging unit having a plate feeding roll shaft supporting means 175 and a plate discharging roll shaft supporting means 185 that are rotatable around the rotation center axis 6 with respect to the printing drum 5. 190, the main body of the stencil type plate-making printing device 350 (hereinafter,
The thermal head 4 serving as a plate making means for making the master 1 is supported by the "printing apparatus main body side", and the master 1 is placed on the thermal head 4 during plate making in the vicinity of the plate feed roll shaft supporting means 175. It is mainly composed of a platen roller 3 which conveys in the master conveying direction while pressing it.

The plate feeding and discharging unit 190 includes a plate feeding roll shaft supporting means 175, a plate feeding roll 2, a platen roller 3, a plate discharging roll shaft supporting means 185, a plate discharging roll 10, and a plate feeding and discharging arm pair 91a and 91b (one is not shown). ), Mainly composed of the plate discharge roll gear 51.

The printing drum 5 and a drum shaft 9 which will be described later.
3a, 93b (one is not shown), plate feeding / discharging unit 1
90 and the ink supply means 60, etc.
0, and the drum unit 220 is detachable from the printing apparatus main body side via the frame 351 by a detaching mechanism (not shown) (see FIG. 9).

The structure around the printing drum 5, the ink supply means 60, the components of the plate supply / discharge unit 190, and the structure around the thermal head 4 will be described below. In FIG. 9, the printing drum 5 is provided so as to extend in the direction of the central axis 6 of rotation, and has a large number of minute holes 5 that allow ink to pass therethrough.
Resin or metal support cylinder 5a in which h is formed
And a mesh screen 5b having a plurality of layers wound around the outer peripheral surface of the mesh screen has a two-layer structure. Support cylinder 5a
Has an opening 5 over a range of approximately two-thirds on its circumference.
A printable area Pa in which h is formed and an ink impermeable non-printing area H in which the opening portion 5h is not formed are formed. In the printable area Pa of the printing drum 5, an opening portion 5h is formed in a range corresponding to a convex portion of the impression cylinder 115, which will be described later, in a range narrower than the width of the master 1, and other portions are non-opening areas. It is a division. The non-printing area H of the printing drum 5 is also provided on both side edge portions as shown in FIG. The thickness of the mesh screen 5b is
Although it is about 0.1 mm, this is exaggerated in the figure.

In FIGS. 9 to 13, the support cylinder 5 is shown.
Both side ends of a and the mesh screen 5b are attached to outer peripheral portions of disk-shaped drum flange portions 12a and 12b (one of which is not shown) arranged with the both side ends sandwiched therebetween. Each drum flange 12a, 12b
A drum shaft 93a is provided at the central base of one (not shown),
93b (one of which is not shown) are integrally formed, and the print drum 5 is rotatably supported by the rotation center shaft 6 via a bearing 14. The printing drum 5 is driven by a drum driving means 230, which will be described later, and indicated by an arrow A in FIG.
Driven to rotate.

On both drum shafts 93a and 93b (one of which is not shown), a pair of plate feeding / discharging arms 91a and 91b (one of which is not shown) sandwiching the printing drum 5 (hereinafter, referred to as "the pair of feeding / discharging arm 91a"). , 91b ”) is rotatably supported with respect to the rotation center shaft 6 via a bearing (not shown). The bases of the plate feeding / discharging arms 91a, 91b are connected to the drum shaft 93a via the plate feeding / discharging friction clutch 92.
93b (one is not shown). As will be described later, the plate feeding / discharging friction clutch 92 is configured such that at the time of printing, the plate feeding / discharging arms 91a, 91b and the drum shafts 93a, 93b.
And are rotated integrally with each other. On the other hand, at the time of plate making and plate discharging, plate feeding / discharging arms 91a, 91b and drum shafts 93a, 9
3b (one of which is not shown) is set so as to be disconnected. The plate feeding / discharging friction clutch 92 is manually disengaged for manual operation at the time of jam.

As shown in FIG. 9, a drum gear 17 is integrally formed on one end side of the drum shaft 93b. A drive motor M fixed to a side plate (not shown) on the printer body side and connected to one end of a drum drive shaft 18 is disposed outside the drum gear 17. At the other end of the drum drive shaft 18,
A drive gear 19 having a tooth portion that meshes with the drum gear 17 when the drum unit 220 is mounted is fixed. As described above, the drum driving means 230 includes the driving motor M,
It is composed of a drum drive shaft 18 and a drive gear 19.
The drum driving means 230 is shown only in FIG.

As shown in FIGS. 9 to 10, on the base side of each of the plate feeding / discharging arms 91a and 91b (one of which is not shown), the home position shown in FIGS.
The rotation balance is maintained at a symmetrical position with respect to each of the plate feeding / discharging arms 91a and 91b (one of which is not shown) in a "fixed position" or "plate feeding position" via the rotation center shaft 6. For this purpose, balancers weights 90a and 90b (one of which is not shown) made of a material of specific importance are fixedly installed. The balancers 90a and 90b are
The plate feeding / discharging arms 91a and 91b (one of which is not shown) are arranged so as not to interfere with other parts when they rotate. The balancer weights 90a and 90b are substantially fan-shaped in a side view, and their sizes and weights are set so as to balance with the rotational moment component of the plate supply / discharge unit 190 with respect to the rotation center axis 6. As will be described later, in the printing process, the printing drum 5 and the plate feeding / discharging unit 190 integrally rotate at high speed. At this time, since the balancer weights 90a and 90b are provided as described above, the integrated body as a whole has a better rotation balance and a smaller load variation during rotation, which is more stable. High-speed printing is possible. Between the free ends of the plate feeding / discharging arms 91a and 91b, connecting members (not shown) for connecting both arms to maintain rigidity are bridged so as not to interfere with other parts.

In FIG. 8, an ink supply means 60 is provided inside the print drum 5, and an ink roller 20 for supplying ink to the inner peripheral surface of the print drum 5, that is, the inner peripheral surface of the support cylinder 5a, and the ink roller 20. The doctor roller 22 is arranged in parallel with the roller 20 with a minute gap and forms an ink reservoir 21 between the roller 20 and the ink roller 20, and also serves as the rotation center shaft 6 of the printing drum 5 and supplies ink to the ink reservoir 21. The ink supply pipe 6 is mainly used. The ink roller 20 has its shaft portion rotatably supported by a side plate (not shown) fixedly mounted on the rotation center shaft 6, and is synchronized with the rotation of the printing drum 5 by drive transmission means such as gears and belts (not shown). It is rotationally driven in the same direction as the rotation direction of the printing drum 5. An elastic body made of oil-resistant nitrile rubber, fluororubber, resin, or the like is formed on the surface of the ink roller 20 to reduce the impact noise when the pressing means, which will be described later, comes into contact. Below the outer peripheral surface of the printing drum 5 facing the ink roller 20,
An impression cylinder 115 as a pressing means is provided rotatably around the eccentric shaft 117 in the direction of arrow B in the figure. Eccentric shaft 11
The reference numeral 7 is supported by a main body side plate (not shown) on the printing apparatus main body side, and is connected to an impression cylinder driving device provided on the printing apparatus main body side. The impression cylinder 115 selectively occupies a printing position where the printing drum 5 is pressed against the printing drum 5 via the printing paper P during printing and a non-printing position separated from the outer peripheral surface of the printing drum 5 during non-printing. The outer peripheral surface of the impression cylinder 115 is adapted to come into pressure contact with the master 1 wound around the outer peripheral surface of the print drum 5 via the printing paper P, and a part of the outer peripheral portion of the impression cylinder 115 is provided with the print drum 5. A cutout recess 118 is formed to avoid interference with the projecting portion of the plate supply / discharge unit 190 projecting in the centrifugal direction from the outer periphery.
The impression cylinder 115 is timed with the sheet feeding device and the plate feeding / discharging unit 190 so that the projecting portion of the plate feeding / discharging unit 190 and the notch recess 118 are aligned with each other, that is, in synchronization with each other. It is adapted to be rotationally driven at a peripheral speed substantially the same as that of No. 5. A part of the cutout recess 118 of the impression cylinder 115 is provided with the printing paper P parallel to the impression cylinder axis.
An openable and closable claw 116 for holding the tip of the is provided. The mullet claw 116 is opened and closed at a predetermined position by an opening / closing unit that has a cam or the like (not shown) and forcibly opens and closes the mullet claw 116.

In the vicinity of the right side of the impression cylinder 115 in the drawing, a printing paper P separated and fed from an upstream side by a paper feeding unit (not shown) from a paper feeding unit (not shown) is provided between the printing drum 5 and the impression cylinder 115. Further, a pair of upper and lower feed rollers 24a and 24b for conveying at a predetermined timing are provided. The pair of feed rollers 24a and 24b are rotatably supported by a main body side plate (not shown) on the main body of the printing apparatus. Print drum 5 and feed roller pair 24a, 24
A pair of feed rollers 2 is provided above the paper conveyance path between
A paper detection sensor 110 for detecting the feeding of the print paper P from the sheets 4a and 24b is provided.

In the vicinity of the left side of the impression cylinder 115 in the drawing, a paper ejection pawl 114 for separating the printed printing paper P close to the impression cylinder 115, and a transport roller front 111 rotatably supported by the main body side plate. And a conveyance belt 113 attached between the conveyance roller rear 112 and the conveyance roller rear 112, a suction conveyance device composed of a suction fan (not shown), the printing drum 5 and the impression cylinder 115.
A peeling fan 37 is provided to blow air to the nip portion between and to peel the paper P from the surface of the printing drum 5. The conveyor belt 113 is driven by a driving unit (not shown).
It is set so as to be driven at a transport speed higher than the peripheral speed of the printing drum 5.

In FIG. 8, the master 1 is a very thin 3
consisting essentially of a thermoplastic resin film of μm thickness,
The small diameter core tube 2s of the plate supply roll 2 is wound in a continuous sheet shape. An antistatic agent is applied to the contact surface of the master 1 with the thermal head 4. Here, the master consisting essentially of a thermoplastic resin film, in addition to those in which the master consists of only a thermoplastic resin film, those containing a trace amount of components such as an antistatic agent in the thermoplastic resin film, further, The thermoplastic resin film includes one or more thin film layers such as an overcoat layer formed on both main surfaces, that is, at least one of the front surface and the back surface. The plate feed roll shaft support means 175 is composed of the attachment / detachment groove 7h and the brake unit 26.

In FIG. 8, the plate feeding / discharging arms 91a, 91
U-shaped attachment / detachment grooves 7h for attaching / detaching the plate feed roll 2 are formed at approximately the center of the free end of b (one is not shown). The plate feed roll 2 is provided in each of the attachment / detachment grooves 7h.
Brake units 26 for applying a predetermined braking force to the core tube 2s at each end of the plate feeding roll 2 are provided.
Is rotatably and detachably supported by both brake units 26 via core tubes 2s at both ends, and plate feeding / discharging arms 91a and 91b (one is not shown).
It is supported so as not to come off from the brake unit 26 due to its inertia when rotating. Therefore, a predetermined braking force is always applied to the core tubes 2s at both ends of the plate feed roll 2, and the master 1 pulled out from the plate feed roll 2
A constant tension is always applied to.

The master 1 supplied from the plate feeding roll 2 is provided on a part of the peripheral surface of the plate feeding and discharging arms 91a and 91b (one of which is not shown) on the right side in the drawing near the plate feeding roll 2 supporting portion. Platen roller 3 that winds and conveys
However, the plate feeding / discharging arms 91a and 91b (one is not shown)
It is attached to a shaft 3s that is rotatably supported by the shaft.
The platen roller 3 is provided with a gap between the platen roller 3 and the outer peripheral surface of the printing drum 5, and plate feeding and discharging arms 91a and 91b (one of which is not shown).
Supported by. The platen roller 3 has JIS hardness A.
Made of 40 ° synthetic rubber anti-static material,
It is provided so as to extend in the axial direction in parallel with the rotation center axis 6.

In FIG. 11, reference numeral 210 indicates a platen roller driving means. Platen roller driving means 210
Is mainly composed of a DC motor (not shown), a plate cam 32, a cam follower bracket 33, a tension coil spring 34, a pulse motor 28 and a gear 31. As shown in FIG. 11, at one end of the shaft 3s of the platen roller 3, the gear 3
0 is fixed. The main body side plate has a rotary drive shaft 3
A DC motor (not shown) connected to 2s is provided, and a plate cam 32 is attached to this rotary drive shaft 32s. In the vicinity of the cam 32 on the printer body side, a cam follower bracket 33 with a roller 33a that comes into contact with the contour peripheral surface of the cam 32 and rolls is disposed.

The cam follower bracket 33 has a shape in which arms are projected on a triangular plate, one end of the triangular portion forms a mounting portion of the roller 33a, and the base end thereof is the shaft 3.
It is pivotally attached to the body side plate in 3s. The protruding arm-shaped free end of the cam follower bracket 33 is given a turning tendency in the counterclockwise direction in the figure by the tension coil spring 34 locked to the body side plate. Further, a pulse motor 28 having a gear 31 fixed to a rotary drive shaft 31s thereof and a gear 31 meshing at a predetermined time described later is attached to one end of the protruding arm of the cam follower bracket 33.

In FIG. 11, reference numeral 50 designates a plate making position (shown by an imaginary line in the drawing) where the thermal head 4 is brought into contact with the platen roller 3 via the master 1 at the time of plate making, and a non-separating position from the plate making position at the time of plate making. The thermal head contacting / separating means for selectively displacing to a plate making position (shown by a solid line in the figure) is shown.

A plate cam 47 is integrally attached to the side plate of the main body and is connected to a drive shaft 47s integrally attached to the main body side plate.
The C motor is fixed. Further, in the vicinity of the cam 47, the main body side plate is pivotally attached by a shaft 48s, and
A cam follower arm 48 with a roller 48a that rolls in contact with the outer peripheral surface of the contour 7 is provided. A mounting portion for the roller 48a is formed at a base end of the cam follower arm 48, and a thermal head 4 provided so as to extend in a direction parallel to the axis 3s of the platen roller 3 is mounted at a free end thereof. . Further, between the mounting portion of the roller 48a of the cam follower arm 48 and the shaft 48s, the other end of the tension coil spring 49 whose one end is locked to the main body side plate is locked. The tension coil spring 49 gives the thermal head 4 a turning tendency in the clockwise direction in the drawing. The thermal head 4 has a well-known configuration in which a large number of fine heating elements are arranged in a line in a direction orthogonal to the sub-scanning transport direction of the master 1, that is, in the main scanning direction.

As shown in FIG. 8, FIG. 10, FIG. 12 and FIG. 13, the winding shaft 9 has a round bar shape and is made of polyamide (PA) resin. The plate discharge roll 10 is for winding the used master 1b in a roll circle shape, and the winding shaft 9 has the other end of the master 1 fed from the plate supply roll 2 adhered thereto in advance. A cutout groove 9a (see FIG. 13) is formed at one end of the winding shaft 9. In FIG. 13, reference numeral 185 indicates a plate discharge roll shaft support means. The plate discharge roll shaft support means 185 is a roll drive shaft 5 to be described later.
2 and the slide shaft 53. The plate feeding / discharging arm 91a has a free end portion made of a pipe material, which is fitted to the cutout groove 9a of the winding shaft 9 of the plate discharging roll 10 to support one end of the plate discharging roll 10. A roll drive shaft 52 having an engagement protrusion 52a protruding in a right angle direction is rotatably provided. A plate discharge roll gear 51 is fixed to the shaft end of the roll drive shaft 52. On the other hand, a free end portion of the plate feeding / discharging arm 91b is formed of a pipe-shaped member having a bottomed portion, and the winding shaft 9 of the plate discharging roll 10 is loosely fitted to support the other end of the plate discharging roll 10. A slide shaft 53 that is slidable in the LR direction in the drawing is provided in parallel with the shaft 3s of the platen roller 3.

The free ends of the plate feeding / discharging arms 91a, 91b near the roll drive shaft 52 and the slide shaft 53 prevent the roll drive shaft 52 and the slide shaft 53 from loosening in the direction opposite to the winding direction. A brake unit (not shown) is provided, and a braking force, which will be described later, is applied to the outer peripheral surface of the print drum 5 such that the master 1 is not loosened when the master 1 is initially set.

In FIG. 12, reference numeral 55 indicates a plate discharge roll driving means for rotationally driving the winding shaft 9 of the plate discharge roll 10. The plate discharge roll driving means 55 includes a plate discharge winding motor 56, a drive gear 58, a connecting arm 59 and a gear 6 which will be described later.
It is mainly composed of 1.

A plate discharge winding motor 56 is fixedly mounted on the main body side plate. Rotation output shaft 57 of plate discharge winding motor 56
A drive gear 58 is fixedly mounted on the. Next to the drive gear 58, the shaft 6 is kept at a predetermined interval by a connecting arm 59.
The drive gear 58 is rotatably supported around 1s and
Is provided with a gear 61 that constantly meshes with a one-way clutch (not shown) incorporated in the bearing portion,
It is rotatable only in the direction of arrow B in the figure.

The oscillating movement of the connecting arm 59 for engaging or releasing the mesh between the plate discharge roll gear 51 and the gear 61 at a predetermined operation timing described later is performed by the rotation output shaft 57,
As for the positional relationship between the shaft 61s and the roll drive shaft 52, the half line connecting the rotation output shaft 57 and the shaft 61s and the half line connecting the roll drive shaft 52 and the shaft 61s are substantially right angles or larger obtuse angles. Since it is set as described above, it can be performed only by the rotation operation of the drive gear 58 by the rotation driving of the plate discharge winding motor 56. That is, at the start of plate making, which will be described later, when the drive gear 58 of the plate discharge winding motor 56 rotates in the direction of arrow A in the figure, the gear 61 is transmitted via the connecting arm 59 under the action of the rotation moment of the gear.
However, it swings in a direction approaching the plate discharge roll gear 51 and meshes with the plate discharge roll gear 51, and the rotational force of the plate discharge winding motor 56 is transmitted to the roll drive shaft 52. On the other hand, at the end of plate making, the driving gear 58 of the plate discharge winding motor 56 is slightly reversely rotated in the direction opposite to the direction of the arrow A in the drawing, so that the gear 61 is stopped through the connecting arm 59 while the plate 61 is discharged. It swings away from the roll gear 51 and disengages from the plate discharge roll gear 51.

The stencil-type plate-making and printing apparatus has been described above. An ink absorbing device provided on the plate discharge roll 10 of the stencil-type plate-making and printing apparatus will be described with reference to FIGS. 1 to 5. Figure 1
At both ends 901 of the winding shaft 9 of the plate discharge roll 10,
Ink absorbing means 1001 and 1002 (only one is shown and the other is omitted) are fixed to 902 (only one is shown, the other is omitted). As shown in FIGS. 2a and 2b, the ink absorbing means 1001 is composed of a sheet absorbing member in which a bellows-like porous sheet 1001b having an acute bending angle is attached to the outside of a sheet base material 1001a in a spiral shape. There is. Sheet base material 1001
As a, a porous sheet base material such as vinyl chloride, polyethylene terephthalate, or polyethylene is used,
As the bellows-like porous sheet 1001b, a blotter paper is used, and the one whose bending angle is bent at an acute angle is used.

Used master 1 wound on the winding shaft 9
The ink remaining in the ink oozes out on both sides of the take-up shaft 9 while being wound on the take-up shaft 9. The ink is contained in the porous sheet substrate 1001a of the ink absorbing means 1001.
And a bellows-like porous sheet 100 wound in a bellows shape
It is absorbed in the space between 1b. In a stencil printing machine using an emulsion ink, even if the ink component absorbs the ink with normal ink absorbing power, the ink component is difficult to collapse and cannot be sufficiently decomposed and absorbed, but as in the present invention, By increasing the absorption area of the means, the decomposition and absorption power of the ink becomes stronger, and since the oil content of the ink can be sufficiently decomposed and absorbed, it is possible to break the bond of the ink components and improve the fluidity, The softening of the amount of ink is promoted, an ink pool is not formed on the end surface of the master 1, and good ink absorption is possible. The ink absorbing means 1001 may be configured by a single-sided corrugated board in which a stencil base paper bent at an acute angle is attached to the outside of the liner. Further, the bellows-like porous sheet 1001b of the ink absorbing means 1001 may be bent in a wavy shape as shown in FIGS. 3a and 3b, and further, as shown in FIGS. 4a and 4b.
As shown in FIG. 5, it may be bent in a wavy shape.

Another embodiment will be described with reference to FIG. FIG. 5 shows only the structure of the take-up shaft 9, and the structures of the stencil-type plate-making printing device 350 and other printing devices are the same as those in the above-mentioned embodiment, so the description thereof is omitted. As shown in FIG. 5, the ink absorbing member 2001 has a first ink absorbing member 4001 and a second ink absorbing member at both ends 901 and 902 of the winding shaft 9 (only one is shown and the other is omitted). It is configured by combining with 3001.
The first ink absorbing member 4001 is provided on the master 1 side of the winding shaft 9 and has the same structure as the ink absorbing means 1001. The first ink absorbing member 4001 is provided with a second ink absorbing member 3001 that fits on the shaft of the take-up shaft 9. Second ink absorbing member 3
001 is a hole 3001a in which the winding shaft 9 is fitted in the central portion.
Is composed of a donut-shaped absorbent member in which
As the absorbing member, an ink absorbing member such as foam sponge, sea surface, blotter paper, and woven fabric is used.

Used master 1 wound on the winding shaft 9
The ink remaining in the ink oozes out on both sides of the take-up shaft 9 in a state of being taken up by the take-up shaft 9, and the ink is absorbed in the first ink absorbing member 4001 and the second ink absorbing member 30.
The ink absorbing means 3001 which is combined with 01 and has a larger storage space is smoothly and quickly absorbed and captured.

1 and 6, both ends 901 and 902 of the winding shaft 9 (only one is shown, the other is omitted) 1001A on the used master 1b side of the ink absorbing means 1001 and 2001. , 2001A has a base 5
001a is a support arm 91a, 91b (only one is shown,
The other one is omitted. ), And a free end 5001b made of an elastic member arranged so as to abut the end surface of the ink absorbing means 1001.
01 is provided. As the elastic member, a piano wire,
Spring steel, phosphor bronze leaf springs, etc. are used.

Used master 1 wound on the winding shaft 9
The ink that remains on the winding shaft 9 oozes out on both sides of the winding shaft 9 while being wound on the winding shaft 9, and the ink that oozes out on the winding shaft 9 overflows. It is enough to be absorbed by, but if it cannot catch up, it overflows. At this time, if the pushing member 5001 made of an elastic member in which the free end 5001b is in contact with the end portions 1001A and 2001A of the ink absorbing means 1001 and 2001 is provided, the ink absorbing means 1001 and 2001 are moved to the winding shaft 9.
The end portions 1001A, 20
01A Free end 5001 of pushing member 5001 on the surface
Since b b circulates, the ink is pushed into the absorbing means by the pushing member 5001 of the take-up shaft 9, and the ink is prevented from staying on the take-up shaft 9.
In a stencil printing machine using emulsion ink, even if the ink components absorb the ink with normal ink absorption,
The ink component is hard to collapse and cannot be sufficiently decomposed and absorbed, but like the present invention, the ink absorbing means 100
1, 1002 (only one is shown, the other one is omitted) 1001A, 200 at the end of the used master 1b side
1A is provided with a pushing member 5001 composed of an elastic member in which a base 5001a is supported by a part of the supporting arms 91a and 91b and a free end 5001b is arranged in contact with an end surface of the ink absorbing means 1001. As a result, the ink that has exuded on the take-up shaft 9 is absorbed by the end portion 10 of the absorbing means.
By being pushed more strongly into the inside than 01A, 2001A, the decomposition and absorption power of the ink becomes strong, and the oil content of the ink is sufficiently decomposed and absorbed, so the bond of the ink components is broken and the fluidity is improved, Of the master 1 is promoted, an ink pool is not formed in the end portions 1001A and 2001A of the master 1, and good ink absorption can be performed.

Another embodiment will be described with reference to FIGS. 6 and 7. 6 and 7, only the structure of the take-up shaft 9 is shown, and the structures of the stencil-type plate-making printing device 350 and other printing devices are the same as those in the above-described embodiment, so the description thereof is omitted. An outer cover 565 is provided on the outer side of the winding shaft 9, and the outer cover 565 is provided at both ends 901, 902 of the winding shaft 9 at both ends 901, 90.
2 and the bearing portion 565a of the cover between the one-way clutch 5
It is provided in a state where 65b is provided. Outer cover 5
In the reference numeral 65, there is an opening 565 through which the used master 1b passes.
c is provided. The outside of the winding shaft 9 is an outer cover 565.
By being covered with, the ink that oozes to the outside of the take-up shaft 9 is prevented from splashing into the device. The one-way clutch 5 is provided between the winding shaft 9 and the bearing portion 565a of the outer cover.
65b is provided, and the outer cover 565 is supported outside the winding shaft 9 without following it even if the winding shaft 9 rotates in the direction of the arrow in FIG.

At both ends 901 and 902 of the winding shaft 9 (only one is shown and the other is omitted), the ink absorbing means 1001 and 100 are provided inside the outer cover 565.
2 (only one is shown, the other one is omitted) is fixed. Since the ink absorbing means 1001 is the same as that shown in the above-mentioned embodiment, its explanation is omitted.
End 10 of used master 1b of ink absorbing means 1001
01A, the base 1501a is supported by a part of the outer cover 565, and the free end 1501b is attached to the ink absorbing means 100.
A pushing member 1501 made of an elastic member is provided so as to be in contact with the surface of the first end portion 1001A.
As the elastic member, a piano wire, spring steel, a phosphor bronze leaf spring, or the like is used.

Used master 1 wound on the winding shaft 9
The ink remaining in the ink oozes out on both sides of the take-up shaft 9 in a state of being taken up by the take-up shaft 9, and the ink that oozes out on the take-up shaft 9 overflows. It just needs to be absorbed by the means, but it overflows if its absorption capacity cannot keep up. At this time, the base portion 1501a is attached to the outer cover 56.
5, the free end portion 1501b is provided with a pushing member 1501 made of an elastic member arranged such that the free end portion 1501b is in contact with the surface of the end portion 1001A of the ink absorbing means 1001. The ink that oozes upward is rotated integrally with the take-up shaft 9 by the ink absorbing means 1001, and the free end portion 1501b of the pushing member 1501 rubs against the end portion 1001A thereof.
By 1, the ink is pushed into the absorbing means, and the ink is prevented from staying on the take-up shaft 9. In a stencil printing machine using an emulsion ink, even if the ink component absorbs the ink with a normal ink absorbing power, the ink component is difficult to collapse and cannot be sufficiently decomposed and absorbed. Absorption means 10
01, 1002 (only one is shown, the other is omitted), the base 1501a is supported by a part of the outer cover 565 at the end 1001A on the used master 1b side, and the free end 1501b is at the ink absorbing means 1001. End 1001
By providing the pushing member 1501 composed of an elastic member arranged in contact with the surface A, the ink that has exuded onto the winding shaft 9 is strongly pushed inside from the end portion 1001A of the absorbing means. As a result, the decomposition and absorption power of the ink becomes strong, and the oil content of the ink is sufficiently decomposed and absorbed, so that the bond of the ink components is broken and the fluidity is improved, and the weight loss softening of the ink is promoted. There is no need to create an ink reservoir on the surface and good ink absorption is possible.

In this embodiment as well, it is needless to say that the ink absorbing means 1001 is subjected to lipophilic treatment by a member having lipophilicity with respect to ink, as in the above-mentioned embodiment. Dimethylchlorosilane or the like is used as a member for lipophilic treatment.

When the ink absorbing means 1001 is subjected to lipophilic treatment, the ink absorbing means 1001 easily becomes compatible with the ink, the ink is absorbed more quickly, and the ink absorbing time can be shortened.

Next, an example of the case where the ink absorbing device of the above embodiment is applied to another stencil type plate making and printing device is shown in FIG.
This will be described with reference to FIG. In FIG. 14, components having the same configurations and functions as those of the components of the above embodiment are designated by the same reference numerals, and the description thereof will be omitted. FIG. 14 is a configuration diagram of main parts of a stencil-type plate-making printing apparatus showing the above example,
First, the configuration of the main part will be described. In FIG. 14, reference numeral 350 'indicates a stencil-type plate-making printing apparatus. Code 3
Reference numeral 51 'denotes a frame arranged at a predetermined position of the stencil plate making and printing apparatus 350'. This stencil printing machine 35
0'is the rotation center shaft 6 in place of the plate feeding / discharging unit 190 of the stencil printing plate making apparatus 350 of the above embodiment.
Is rotatable with respect to the printing drum 5 and is rotatable with respect to the printing drum 5 and the plate feeding unit 170 about the plate feeding unit 170 having the plate feeding roll shaft supporting means 175 and the rotation center axis 6. A plate discharge unit 180 having a plate discharge roll shaft support means 185, a press roller 11 in place of the impression cylinder 115, and a plate supply unit 170 and a plate discharge unit 180 for joining the plate discharge unit 180 at a predetermined time. The main difference is that the means 40 is included.

The difference will be mainly described below. The plate supply unit 170 includes a plate supply roll shaft support means 175, a plate supply roll 2, a platen roller 3, and a plate supply arm pair 7a.
Mainly consists of 7b.

The plate discharging unit 180 is mainly composed of a plate discharging roll shaft supporting means 185, a plate discharging roll 10, a plate discharging arm pair 8a, 8b, and a plate discharging roll gear 51 which will be described later. The printing drum 5, the plate supply unit 170, the plate discharge unit 180, the ink supply unit 60, and the like constitute a drum unit 220 ', and the drum unit 220' is detachable from the printing apparatus main body side through a frame 351 'by a detaching mechanism (not shown). Has become. Both drum shaft 1
A pair of plate feeding arms 7a and 7b (hereinafter referred to as "plate feeding arm pair 7") are provided on the inner side of the printing drum 5 with the printing drum 5 interposed therebetween.
a, 7b "), but a pair of plate ejection arms 8a, 8b (hereinafter referred to as" plate ejection arm pair 8a, 8b ").
b)) are rotatably supported on the rotation center shaft 6 via bearings (not shown).

The printing drum 5 facing the ink roller 20
A press roller 11 as a pressing unit is rotatably provided around the shaft 11s in the vicinity of the lower portion of the outer peripheral surface of the.
The shaft 11s includes a pair of arms 23 arranged at both ends of the shaft,
The arms 23, 23 are supported by a shaft 23 attached to a side plate (not shown) on the main body of the printing apparatus.
It is swingably supported around s. Press roller 1
1 is a printing position where the printing drum 5 is pressed against the printing drum 5 during printing, and an unused plate feeding roll 2U and a used master 1b are wound up to the end by the winding shaft 9 when not printing, and are in a full state. Rejected plate discharge roll 10 (shown by phantom lines in the figure)
In order to avoid contact with the protruding portion of the printing drum 5, the 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 roller pairs 24a, 24b for conveying the print paper P fed from the upstream side by a paper conveying means (not shown) between the print drum 5 and the press roller 11. Is provided. Above and below the nip portion of the feed roller pair 24a, 24b, a pair of upper and lower guide plates 25a, 25b for guiding the printing paper P between the printing drum 5 and the press roller 11 are arranged.

At the free ends of the plate feeding arm pairs 7a and 7b,
U-shaped attachment / detachment grooves 7h for attaching / detaching the plate supply roll 2 or the unused plate supply roll 2U are formed.
A brake unit 26 that applies a predetermined braking force to the core tube 2s at each end of the plate feed roll 2 is provided in each attachment / detachment groove 7h, and the plate feed roll 2 passes through the core tubes 2s at both ends. Can be rotated by both brake units 26, and
It is detachably supported, and the plate feeding arm pair 7a,
It is supported so as not to come off from the brake unit 26 due to its inertia when the 7b rotates.

Plate feeding roll 2 A pair of plate feeding arms 7 near the supporting portion
The platen roller 3 has a plate feeding arm pair 7a, 7a,
It is attached to a shaft 3s rotatably supported by 7b. Plate feeding arm pair 7a, 7b and plate discharging arm pair 8a,
8b is integrally connected by the plate feeding / discharging arm joining means 40 at the home position (plate feeding position) or the like. This plate feeding / discharging arm joining means 40
Is a locking pin 4 implanted at a predetermined position of the plate feeding arm 7b.
1, a lock lever 45 pivotally attached to a predetermined position of the plate discharge arm 8b by a shaft 43, and one end of which has a fitting groove 45h for engaging the lock pin 41 at a predetermined time, and a plate discharge arm. 8b is fixed at a predetermined position and has a plunger 46p.
This solenoid 46p has a solenoid 46 rotatably connected to the other end of the locking lever 45 via a pin.
And a fitting groove 45h of the locking lever 45 is provided between the one end of the locking lever 45 and a pin 8p planted at a predetermined position of the plate discharge arm 8b in the counterclockwise direction in the figure. And a stopper 44 that is implanted at a predetermined position of the plate discharge arm 8b and that stops the other end of the locking lever 45. The locking lever 45 is made of sheet metal and has a substantially L shape. The ink absorbing means 1001 and the pushing member 1501, which are described above, are provided at both ends of the plate discharge roller 10 of the other stencil plate making / printing apparatus 350 ′.
5001 is provided.

[0048]

As described above, according to the invention described in claim 1, it is on the outer periphery of the plate discharge roll, near the side edge of the used master, and on the outside of the porous sheet-shaped substrate. The ink absorbing means, which is configured by winding a bellows-like porous sheet, is arranged to increase the ink absorption area, so ink that has exuded from both ends of the wound portion of the used master is absorbed by the ink. The means absorbs quickly, the ink is dropped on the printing drum at both ends of the plate discharge roll and the absorption cannot catch up, and the ink stains the printed matter,
It is possible to prevent the device from being damaged by being attached to a mechanical portion around the printing device.

According to the second aspect of the present invention, since the pushing member for pushing the ink from the used master into the ink absorbing means is provided on the end surface side of the ink absorbing means on the master side, the used master is wound up. The ink that has exuded from both ends of the part is pushed into the ink absorbing means and is quickly absorbed by the ink absorbing means, so the above ink drops at the both ends of the plate discharge roll and cannot be absorbed, and drops onto the printing drum. It is prevented that the ink is contaminated and the ink adheres to the mechanical portion around the printing device to cause the device to malfunction.

According to the third aspect of the present invention, a porous sheet-like base material is provided on the outer periphery of the plate discharge roll in the vicinity of the side edge of the used master, and a bellows shape is formed outside the base material. An ink absorbing unit configured by winding a folded porous sheet, a cover that covers the outside of the plate discharge roll, and a cover fixed to the cover so as to contact the end face side of the master side of the ink absorbing unit. And the pushing member for pushing the ink from the used master into the ink absorbing means, the ink exuding from both ends of the winding portion of the used master is pushed into the ink absorbing means. In this way, the ink is quickly absorbed inside the ink absorbing means, and the ink is
It is prevented that the ink does not catch up and drops on the printing drum, the printed matter is contaminated by the ink, and the ink adheres to a mechanical portion around the printing apparatus to cause the apparatus to malfunction.

According to the fourth aspect of the invention, the ink absorbing means is subjected to lipophilic treatment, and the ink that has exuded onto the plate discharge roll shaft from both ends of the winding portion of the used master is familiar to the ink absorbing means. Since it becomes easier and is absorbed quickly, the above ink is dropped on the print drum at both ends of the plate discharge roll because the absorption of the ink cannot catch up with the wound portion of the used master, and the ink stains the printed matter or ink It is possible to prevent the device from being damaged by being attached to a mechanical portion around the printing device.

[Brief description of drawings]

FIG. 1 is a perspective view of a winding shaft end portion of a plate discharge roll of a stencil-type plate making and printing apparatus showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an embodiment of the ink absorbing means of the stencil-type plate making and printing apparatus of the present invention, and a structure expansion configuration diagram on the master side thereof.

FIG. 3 is a perspective view showing another embodiment of the ink absorbing means of the stencil-type plate making and printing apparatus of the present invention, and an enlarged structural view of the structure of the master side thereof.

FIG. 4 is a perspective view showing still another embodiment of the ink absorbing means of the stencil plate making and printing apparatus of the present invention, and a structural enlarged view of the master side thereof.

FIG. 5 is a partially cutaway perspective view showing another embodiment of the ink absorbing means of the stencil type plate making and printing apparatus.

FIG. 6 is a partially cutaway perspective view of the plate discharge roll of the stencil plate making and printing apparatus according to the embodiment of the present invention, as seen from the end side of the winding shaft end.

FIG. 7 is a perspective view of an end of a winding shaft of a plate discharge roll of a stencil-type plate making and printing apparatus according to an embodiment of the present invention, as viewed from the center of the shaft.

FIG. 8 is a partial cross-sectional side view of a main part of a stencil type plate making and printing apparatus to which the ink absorbing device according to the present invention is applied.

FIG. 9 is a vertical cross-sectional view showing a drive unit of a printing drum of a stencil plate making and printing apparatus.

FIG. 10 is a side sectional view showing a configuration of a plate feeding / discharging unit of the stencil plate making / printing apparatus.

FIG. 11 is a side sectional view of an essential part showing a configuration of a plate supply section of the plate supply / discharge unit of the stencil plate making / printing apparatus.

FIG. 12 is a side cross-sectional view of a main part showing a configuration of a plate discharge section of the stencil printing machine.

FIG. 13 is a side sectional view of an essential part showing a configuration of a plate discharge portion of the plate supply / discharge unit of the stencil plate making / printing apparatus.

FIG. 14 is a partial cross-sectional side view of essential parts showing an example in which the above-described embodiment is applied to another stencil-type plate-making printing apparatus.

FIG. 15 is a partial cross-sectional view of a conventional ink absorbing device.

[Explanation of symbols]

1 master 2 Plate supply roll 4 Plate making means 5 printing drum 7a, 7b, 91a, 91b Roll supporting means 10 Plate ejection roll 60 ink supply device 565 outer cover 1001,2001 Ink absorption means 1001a Porous sheet base material 1001b Bellows-like porous sheet 1501,5001 Push-in member

Claims (4)

(57) [Claims] 1. A printing drum having a master for stencil wound around an outer peripheral surface thereof and rotating around a rotation center axis, an ink supply means for supplying ink to an inner peripheral surface of the printing drum, and one end of the master wound around the master. And a plate supply roll for supplying the master to the printing drum, a plate making means for making the master, a plate discharge roll for winding the used master from the printing drum at the other end of the master, and a plate supply roll. In the stencil plate making and printing apparatus comprising a roll supporting means that supports the plate discharge roll and is rotatable with respect to the central axis of the printing drum, the outer periphery of the plate discharge roll is the used master. In the vicinity of the side edge of the, the ink absorbing means constituted by winding a porous sheet bent in a bellows shape on the outside of the porous sheet-shaped substrate is arranged. Ink absorption apparatus of the stencil type plate-making printing device. 2. The ink absorbing device of a stencil plate making printing apparatus according to claim 1, wherein a pushing member for pushing the ink from the used master into the ink absorbing means is an end surface of the ink absorbing means on the master side. An ink absorbing device for a stencil-type plate-making printing device, which is provided on the side. 3. A printing drum having a master for stencil wound around an outer peripheral surface thereof and rotating around a rotation center axis, an ink supplying means for supplying ink to an inner peripheral surface of the printing drum, and one end of the master is wound. And a plate supply roll for supplying the master to the printing drum, a plate making means for making the master, a plate discharge roll for winding the used master from the printing drum at the other end of the master, and a plate supply roll. And a roll supporting means that supports the plate discharge roll and is rotatable with respect to the central axis of the printing drum; and a perforation near the side edge of the used master on the outer periphery of the plate discharge roll. Absorbing sheet-like base material and an ink absorbing means configured by winding a porous sheet bent into a bellows shape on the outside of the sheet-like base material, and a cover for covering the outside of the plate discharge roll. And a pushing member that is fixedly provided to the cover so as to abut the end surface side of the master side of the ink absorbing means, and that pushes the ink from the used master into the inside of the ink absorbing means. Ink absorption device of the stencil-making plate making machine equipped with. 4. An ink absorbing device for a stencil-type plate-making / printing apparatus according to claim 1, 2 or 3, wherein said ink absorbing means is subjected to a lipophilic treatment. Ink absorption device.