JPH0825780A - Sheet discharge unit for stencil printer - Google Patents

Abstract

PURPOSE:To discharge a print sheet without making dirty a printed surface by supplying the sheet between a pair of rotatable plate cylinders opposed to each other, and engaging sheet discharge grippers provided at the cylinders with the side edge of the non-image forming area of the printed sheet. CONSTITUTION:The sheet discharge unit for a stencil printer comprises upper master locking means 90, lower master locking means 140, upper ink supply means 100 and lower ink supply means 150 at each of a pair of upper and lower plate cylinders 1, 51 supported oppositely to the parts of outer peripheries. Further, the unit also comprises two plate cylinder support means for separably supporting the one cylinder to the other cylinder. Rockable sheet discharge pawls 21a, 21b and lower sheet discharge pawls 23a, 23b are engaged with the side edges of the non-image forming area of the printed sheet Pa on the outer periphery of the cylinder 51, and the sheet Pa is held by upper and lower pressing rollers 17a, 17b and 19a, 19b to be rotated, and conveyed to the downstream side of the conveying direction X.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stencil printing machine,
More specifically, the present invention relates to a paper ejection device in a stencil printing device capable of simultaneously printing both sides of a printing paper.

[0002]

2. Description of the Related Art A cylindrical support cylinder and a mesh screen layer, which is a mesh of resin or metal fibers, and a cylindrical master for stencil printing which has been perforated on the outer peripheral surface is wound. A plate cylinder and an ink supply member that contacts the inner peripheral surface of the plate cylinder and supplies ink, and continuously press the outer peripheral surface of the plate cylinder through a printing paper with a pressing means such as a press roller. There is well known a stencil printing apparatus which performs printing by bleeding ink from the apertures of the supporting cylinder, the mesh screen layer and the master perforation and transferring it to printing paper.

In such a stencil printing machine, ink is supplied to the outer peripheral surface of an ink roller or the like as an ink supply member provided inside the plate cylinder, and the outer peripheral surface of the plate cylinder is pressed by pressing means such as a press roller. As a result, the ink roller or the like is brought into contact with the inner peripheral surface of the plate cylinder, and the ink is allowed to pass through the openings of the supporting cylinder, the mesh screen layer, and the master perforation part. When used in a high temperature environment where fluidity is extremely high, a large amount of ink bleeds out and the density of the printed image increases, and the adhesive force of the ink causes the printing paper to stick to the outer peripheral surface of the printing cylinder. The sticking force becomes large and it becomes difficult to peel off.

In the stencil printing machine, when the printing paper is peeled from the plate cylinder, a peeling member called a paper discharge nail (peeling nail or separation nail) is brought close to the outer peripheral surface of the plate cylinder and the waist of the printing paper is used. A method is generally used in which printed paper (hereinafter simply referred to as "paper") is inserted into the gap floating from the plate cylinder and the paper ejection nail is peeled off from the tip. Therefore, as described above, when printing in a low speed or high temperature environment, especially when there is a solid area with a large image area at the leading edge of the paper, the leading edge of the paper does not lift up just by the waist of the paper and sticks to the plate cylinder. Then, the paper cannot be peeled off by the paper ejection claws, and the paper sticks to the outer peripheral surface of the plate cylinder and is not ejected.A common phenomenon called "roll-up" is likely to occur, or a printed image is formed when peeling. The paper image surface (hereinafter referred to as the "printing surface") that is in contact with the abdomen of the paper ejection nail causes the "rubbing dirt" of the paper ejection nail, which is also called "nail mark dirt", to occur on the printing surface. was there. Therefore, conventionally, the paper ejection claw is generally provided at a position corresponding to the vicinity of the edge of the paper, which has a small number of images and is easily peeled off by the waist of the printing paper, to reduce the winding failure, and also to reduce the winding failure. As disclosed in Japanese Laid-Open Patent Publication No. 148864, by sucking and transporting a sheet by a transport belt,
It also reduces dirt on the paper due to the paper ejection claws.

By the way, in recent years, in order to reduce the consumption of printing paper, double-sided printing, in which printing is performed on both the front and back sides of the printing paper, has become the majority of printing. In such double-sided printing, the printing paper stacked in the paper feed section of the stencil printing machine is passed through, one-sided printing is performed, then the sheet is turned over again and passed through, and the other side is printed. However, it is troublesome to set the discharged single-sided printed paper in the paper feeding section again or to neatly arrange the single-sided printed paper, and perform printing twice. As a result, the printing time becomes long. Therefore,
Attempts have been made to develop an apparatus in which two plate cylinders are arranged so as to face each other, and the plate cylinders are pressed against each other via a printing paper to obtain a double-sided printed matter in one pass. As a technique for performing double-sided printing by such a single pass, for example, Japanese Patent Laid-Open No. 6-7
As disclosed in Japanese Patent Laid-Open No. 1996-1996, one using two paper discharging claws (peeling claws) and a conveyor belt has been proposed.

[0006]

However, in the stencil printing, printing is performed in a form in which ink is spread on the printing paper surface,
The ink of the printed image transferred to the surface of the printing paper is dried by the ink penetrating the paper,
When the printed surface is rubbed or touched by a paper ejection nail or the like, it takes a predetermined time until the ink is not contaminated. Therefore, in the case of performing double-sided printing, in the former case, if the print surface on which the ink of the print image is transferred is brought into contact with the conveyor belt immediately after printing, the print image surface is rubbed by the conveyor belt member, etc. There is a problem that ends up. Also, in the case of performing one-pass double-sided printing, in the latter case, the printing surface is rubbed and soiled because there is no consideration for curling up and rubbing stains due to the paper ejection claw, and consideration for rubbing stains on the printed image surface due to the transport belt. There is a problem.

Therefore, in order to solve such a problem, the present invention is a stencil printing apparatus capable of performing double-sided printing in one pass, and can stably discharge the paper without contaminating the printing surface. The purpose is to provide a device.

[0008]

In order to achieve the above-mentioned object, a first aspect of the present invention is to provide a pair of plate cylinders rotatably supported with their outer peripheral surfaces facing each other, and each plate cylinder. A master locking means disposed on the outer peripheral surface for locking the tip of the master for stencil printing, and an ink supply means disposed inside each plate cylinder and supplying ink to the inner peripheral surface, Two plate cylinder supporting means for supporting at least one of the plate cylinders so as to freely come into contact with and separate from the other plate cylinder in a direction in which the respective ink supply means face each other, and a non-image of a printed sheet on each outer peripheral surface. At least two paper ejection pawls respectively provided on the downstream sides of the two plate cylinders in the paper transport direction for engaging the side edge portion in the forming region and separating the paper from the outer peripheral surfaces; The paper is conveyed by pressing and holding the side edges against each other and rotating them. For transporting to the downstream side of the direction, it is characterized by comprising a paper discharge means provided on the downstream side of the sheet conveyance direction in two of the delivery grippers.

According to a second aspect of the invention, in the sheet discharging device of the stencil printing apparatus according to the first aspect, the discharged sheet conveying means is a pressing roller pair.

According to a third aspect of the present invention, in the sheet discharging device of the stencil printing apparatus according to the second aspect, the sheet discharging and conveying means is provided on the downstream side of the pressing roller pair in the sheet conveying direction and is rotatable. It is characterized in that it comprises at least one tension roller supported and a conveyor belt stretched between the pressing roller pair and the tension roller.

[0011]

According to the first aspect of the invention, the printing paper is supplied between the pair of plate cylinders that are opposed to each other and rotatably supported, so that printing is performed on both sides of the printing paper in one pass. By engaging at least two paper ejection claws provided on the downstream side of each plate cylinder in the paper transport direction with side edges in the non-image forming area of the printed paper,
The printed paper is separated and peeled from the outer peripheral surface of either of the pair of plate cylinders. In this way, the printed paper separated and peeled by each paper ejecting claw is guided and conveyed by the paper ejecting and conveying means by the side edges being pressed against each other, sandwiched and rotated, and the printed paper is conveyed in the paper conveying direction. Is transported to the downstream side.

According to the second aspect of the present invention, since the paper discharge conveying means is the pressing roller pair, the pressing roller pair surely guides and conveys the side edge portion of the printed sheet in the non-image forming area. The printed sheet is conveyed downstream in the sheet conveying direction.

According to the third aspect of the present invention, the sheet discharging and conveying means includes at least one tension roller that is provided on the downstream side of the pressing roller pair in the sheet conveying direction and is rotatably supported, and the pressing roller pair. Since it consists of a conveyor belt stretched between the tension roller and the tension roller, the side edge of the printed paper in the non-image forming area is guided by the conveyor belt while being securely held even for a long distance. The conveyed and printed sheet is conveyed to the downstream side in the sheet conveying direction.

[0014]

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

FIG. 1 shows the construction of a stencil printing machine to which an embodiment of the present invention is applied. First, the configuration of this stencil printing machine will be described in sequence.

In the figure, reference numeral 1 is on the plate cylinder, and reference numeral 5 is
Reference numerals 1 indicate the lower parts of the plate cylinder. On these plate cylinders 1,
The lower plate cylinder 51 is rotatably supported by two plate cylinder support means and a lower plate cylinder support means, which will be described later, with their outer peripheral surfaces partially facing each other. That is, the upper plate cylinder 1 is supported and arranged at a predetermined position above the lower plate cylinder 51 by one of the plate cylinder supporting means. A lower plate cylinder 51 is disposed on the upper plate cylinder 1 so as to come into contact with and separate from the upper plate cylinder 1 by the other plate cylinder supporting means. Under plate 51,
It also has a function of a press roller as a pressing means adopted in a conventional stencil printing machine or the like, and by the lower part of the plate cylinder supporting means, the lower plate cylinder 51 is placed on the upper plate cylinder 1 through the printing paper.
The printing position pressed against the plate cylinder and the non-printing position separated from the plate cylinder 1 are selectively occupied.

Each structure and function of the upper plate cylinder 1, the lower plate cylinder 51, a plate making section 80 as a plate making apparatus, a plate making section lower 130, a plate ejecting section upper 110 as a plate ejecting apparatus, and a plate ejecting section lower 160, which will be described later, have respective structures. Since they are basically the same except for the arrangement state of components and the order of operation, the following description will be made by taking the plate cylinder top 1, the plate making part top 80, and the plate discharge part top 110 as an example. Regarding the configurations of the plate cylinder lower part 51, the plate making part lower part 130, and the plate discharge part lower part 160, the reference numeral of each component used in the plate cylinder upper part 1, the plate making part upper part 80, and the plate discharge part upper part 110 is added with 50. Show.
Further, regarding the names of the respective constituent parts of the plate cylinder upper part 1, the plate making part upper part 80, and the plate discharge part upper part 110, “upper” is added at the end of each name, and the respective constituent parts of the plate cylinder lower part 51, the plate making part lower part 130, and the plate discharge part lower part 160. The names of "" are distinguished by adding the word "below" to the end of each name. Below, plate lower part 51, plate making subordinate 1
Each of the components of the plate 30 and the lower part of the plate discharge section 160 will be described in detail only when there is a difference in the arrangement state and the operation sequence, and the description thereof will be omitted when the configurations and functions are the same.

The plate cylinder top 1 is provided so as to extend in the axial direction of the ink pipe 5, and has a metal porous support cylinder 1a on which a large number of ink passage portions are formed, and an outer peripheral surface thereof. And a mesh screen (not shown) made of a resin net such as polyester or a metal net covering the above. Disc-shaped flange tops 25a, 25b for closing both ends of the plate cylinder top 1 are fixedly provided at both ends of the plate cylinder top 1. A rolling bearing (not shown) is interposed between the central bases of the flanges 25a and 25b and the ink pipe 5.
The plate cylinder upper part 1 is rotatable around the ink pipe upper part 5.

Inside the plate cylinder 1, ink supply means 10 for supplying ink to the inner peripheral surface of the porous supporting cylinder 1a.
0 is set. The ink supply means top 100 is arranged in parallel with the ink roller top 2 for supplying ink to the inner peripheral surface of the porous support cylindrical body 1a and the ink roller top 2 with a minute gap therebetween. The ink serves as a doctor roller upper part 3 which forms an ink reservoir upper part 4 between it and the plate, and also serves as a rotation center axis (support shaft) of the plate cylinder 1 and supplies ink to the ink reservoir upper part 4 from an opening 5h formed in the lower part thereof. It is mainly composed of the upper part 5 of the ink pipe. The ink roller top 2 is rotatably supported by an ink roller side plate (not shown), and is driven to rotate in the same direction by a drive means (not shown) such as a gear and a belt in synchronization with the rotation of the plate cylinder 1. The ink roller top 2 is formed in a roller shape by a member whose outer peripheral surface is covered with an oil resistant elastic body. For this oil resistant elastic body, for example, fluororubber, high nitrile rubber or the like is adopted.

On the outer peripheral surface of the upper plate cylinder 1, there is provided a master locking means upper part 90 for locking the tip of the master upper part 8 for stencil printing. The master locking means upper 90 is a magnetic stage 6 provided along one generatrix of the plate cylinder 1,
A rotatable clamper shaft 7a provided parallel to the upper surface of the stage 6 and a rubber magnet fixedly mounted integrally on the clamper shaft 7a and capable of opening and closing with respect to the flat surface of the stage 6 are provided. It is mainly composed of the affixed clamper top 7. The upper plate cylinder 1 is arranged so that the upper clamper 7 is stopped at a position substantially right above the plate, that is, at the plate feeding position. The clamper top 7 is opened and closed by a not-shown opening / closing means at a predetermined position such as the plate feeding position.

On the upper left side of the plate cylinder 1 in the drawing, a plate making section 80 for making the master upper 8 wound in a roll is provided. The plate-making part top 80 is a master roll top 8a formed by winding a continuous sheet-shaped master top 8 consisting of a thermoplastic resin film and a porous support (both not shown) around a roll core 8b. A holder means (not shown) for supporting the upper part 8 so that it can be extended; and a holder means provided on the downstream side of the holder means in the master conveyance direction,
A thermal head 10 for perforating the master 8 on the basis of image information; and a platen roller 9 for conveying the master 8 to the downstream side in the master conveying direction while pressing the master 8 against the thermal head 10.
A platen roller 9 is provided on the downstream side in the master conveying direction, and a feed roller 11 for holding the plate-making master 8 in a state of being pressed against each other and conveying it to the downstream side in the master conveying direction; and a plate-making master. A guillotine type cutter upper 12 that cuts the upper 8 to a predetermined length, and a plate-making side plate (not shown) downstream of the cutter upper 12 in the master conveying direction are fixed to each other, and the tip of the master upper 8 is fixed to the stage 6 and the clamper. 7
It is mainly composed of a guide plate upper part 13 for guiding between and.

The holder means is fixed to the plate-making side plate and rotatably supports the roll core 8b of the master roll 8a.

The platen roller upper 9 is rotatably supported by the plate making side plate, and is driven to rotate by a stepping motor (not shown) fixedly provided on the plate making side plate.

A large number of heating elements are arranged in a line on the thermal head 10, and the heating is performed in a pulsed manner by digital image information sent from an original reading unit (not shown) to selectively heat and punch the thermoplastic resin film. It has a well-known structure and function.

The feed roller top 11 is a feed drive roller top 1.
1a and a feed driven roller 11b. The feed drive roller upper 11a is rotationally driven at a peripheral speed slightly higher than the peripheral speed of the platen roller upper 9 by the stepping motor via a torque limiter (not shown). As a result, a predetermined tension is applied to the plate-making master 8 between the platen roller 9 and the feed roller 11 so that slack or the like does not occur.

The upper cutter 12 comprises a fixed blade 12b and a movable blade 12a. The movable blade 12a is moved up and down by an up-and-down drive means fixed to the plate-making side plate. 12 on the cutter
Is not limited to the guillotine type, and the movable blade may be a rotary blade.

On the upper right side of the plate cylinder 1 in the figure, there is disposed a plate discharge section 110 for discharging the used master plate 8 wound on the outer peripheral surface of the plate cylinder 1. Top 1
The reference numeral 10 designates a pair of upper plate discharge rollers which scrape the used master upper 8 from the rear end thereof and discard it in the upper plate discharge box 28 when the upper plate discharge roller 26 contacts the upper plate cylinder 1 when the upper plate cylinder 1 rotates counterclockwise. 26 and a plate discharge upper roller 27, and a plate discharge upper box 28 for accommodating the used master plate 8 mainly. The plate ejection roller 26 and the plate ejection roller 27 are rotationally driven by a plate ejection motor (not shown).

A front frame fixed to both ends of the plate cylinder 1, the ink supply unit 100, the flanges 25a and 25b, the plate cylinder upper gear 31 and the like constituting the upside-down moving unit 170, and the ink pipe 5. Further, the plate cylinder upper unit 1U is composed of a rear frame, a grip frame (both not shown) that connects the front frame and the rear frame, and the like. On the other hand, a holding means (not shown) for detachably supporting the front frame and the rear frame is provided on the stencil printing machine main body side.
And a bearing (not shown) for detachably supporting one end of the ink pipe 5 are provided, and these constitute a plate cylinder supporting means (not shown) as one plate cylinder supporting means. To be done. The plate cylinder upper unit 1U is attachable to and detachable from the plate cylinder supporting means and a drive motor gear 30G and a planet gear 33 which will be described later. The front frame, the rear frame, the gripping frame, and the plate cylinder supporting means have the same structure as that shown in, for example, FIG. 2 of JP-A-5-229243.

Next, the structures of the plate cylinder lower part 51, the plate making part lower part 130 and the plate discharging part lower part 160 will be described in detail.

Lower 150 of ink supply means on the lower side 51 of the plate cylinder
Is disposed on the upper side inside the lower plate cylinder 51 so as to face the ink supply means 100 on the upper plate cylinder 1. That is, the lower part 150 of the ink supply means is arranged below the lower part 52 of the ink roller arranged so as to face the upper part 2 of the ink supply means 100.
And a doctor roller lower 53 that is disposed diagonally below the ink roller lower 52 to form an ink fountain lower 54 between the ink roller lower 52 and an ink pipe lower 55, and is attached to an opening 55h formed on the left side of the ink pipe lower 55. Ink guide pipe 55 for supplying ink from the opened hole 55h to the bottom 54 of the ink reservoir
It is mainly composed of p and p. The lower 52 of the ink roller is
It is rotatably supported by an ink roller side plate (not shown) disposed above the lower part of the plate cylinder 51, and is rotationally driven in the same direction by a driving means (not shown) such as a gear and a belt in synchronization with the rotation of the lower plate cylinder 51. It

On the outer peripheral surface of the lower plate cylinder 51, there is provided a lower master locking means 140 which is arranged in the left-right direction with respect to the upper master locking means 90 in the figure. Under plate 51
Is stopped at a state where the lower clamper 57 is positioned substantially right below in the figure, that is, at the plate feeding position. The lower clamper 57 is opened and closed by an opening / closing means (not shown) at a predetermined position such as the plate feeding position.

Below the plate cylinder 51, below the plate making section 130 is disposed on the lower left side. The lower plate making unit 130 has a supporting position of the lower master roll 58a by holder means (not shown) above the lower platen roller 59 with respect to the upper plate making unit 80, and the lower master roll 58a is rotatable in the clockwise direction. The difference is that they are supported, and the lower platen roller 59 and the lower thermal head 60 are arranged upside down.

Below the plate cylinder 51, a plate discharge section lower 160 is disposed on the lower right side in the drawing.

In FIG. 2, reference numeral 120 indicates the lower part of the plate cylinder supporting means as the other plate cylinder supporting means. The lower plate cylinder support means 120 supports the lower plate cylinder 51 on the upper plate cylinder 1 so as to be able to come into contact with and separate from the upper plate cylinder 1. The plate cylinder support means lower 120 is, as described later, a pair of plate cylinder arms 38a and 38b, a pair of rollers 39 and 39,
A pair of plate cams 40, 40, a pair of tension coil springs 4
3, 43, a pair of stoppers 41, 41, and a pair of plate cylinder arm lock release means 121, 121. As described above, since the lower plate cylinder supporting means 120 has the same structure on both outer sides (front side and rear side of the plane of FIG. 2) of the lower plate cylinder 51, the rear side of the plane of FIG. 2 will be described below. 2 will be described in detail as an example, and description of those arranged on the front side of the plane of FIG. 2 will be omitted.

The plate cylinder arm 38b is pivotally mounted at a portion near the plate cylinder lower 51 by a plate cylinder arm shaft 38s which is planted in a side plate (not shown) as an immovable member on the stencil printing machine main body side. One end of the plate cylinder arm 38b is fixed to the lower portion of the ink pipe 55, and a cutout portion 38c is formed at the other end. A roller 39 as a cam follower is rotatably attached to a roller shaft 39s planted in the plate cylinder arm 38b between the cutout portion 38c of the plate cylinder arm 38b and the pivot portion of the plate cylinder arm shaft 38s. . On the other hand, on one side portion of the side plate, a cam shaft 40s rotatably supported by the side plate rotates in synchronization with the lower plate cylinder 51. A large diameter portion fixed to the cam shaft 40s near the roller 39 and engaged with the roller 39 such that the lower plate cylinder 51 occupies the non-printing position shown by the solid line in the figure and the roller 39 are engaged. A plate cam 40 having a small diameter portion is provided. The plate cylinder arm 38 between the roller 39 and the plate cylinder arm shaft 38s pivoting portion
One end of a tension coil spring 43 whose other end is locked to the side plate is locked to the lower end of b. Therefore,
Due to the tension coil spring 43, the lower plate cylinder 51 is given the habit of being urged to oscillate in a direction occupying a printing position indicated by an imaginary line in the drawing with the plate cylinder arm shaft 38s as a rotation center. Then, at the same printing position, it is pressed against the outer peripheral surface of the plate cylinder 1 shown in FIG.

The plate cylinder arm unlocking means 121 is fixed to the side plate, and the plunger 42p and the plunger 42 are provided.
Solenoid 42 having return spring 42s wound around p
A plunger 42p is rotatably connected to the central portion of the stopper shaft 41 through a pin, and the stopper shaft 41 is planted in the side plate.
s has a base end swingably supported, and a free end is formed with a locking claw 41c which selectively engages with the cutout 38c. The cutout 38c and the locking claw 41c are connected to each other. It is mainly composed of a stopper 41 that selectively locks the swing of the plate cylinder arm 38b by selective engagement. Except during printing and paper feeding, the solenoid 42 is turned off so that the cutout portion 38c of the plate cylinder arm 38b and the locking claw 41 of the stopper 41 are engaged.
By selectively engaging c with the urging force of the return spring 42s, the lower plate cylinder 51 is held at a non-printing position separated from the upper plate cylinder 1.

In FIG. 3, reference numeral 170 indicates an upside-down moving means. The up-and-down moving means 170 is, as described later, a plate cylinder upper gear 31, a connecting link upper 32, a moving rod 35, a not shown moving rod driving means, a plate lower cylinder gear 81, a connecting link lower 82, and a pair of planets that mesh with each other. The gear 33, 33 and the pair of connecting links 34, 34 are mainly configured. The upper plate cylinder 1 and the lower plate cylinder 51 are connected by an up-and-down moving means 170.

An upper plate cylinder gear 31 is integrally attached to the outer end of the upper flange 25a of the upper plate cylinder 1. Similarly, the lower plate cylinder gear 81 is integrally attached to the outer end portion of the lower flange 75a of the lower plate cylinder 51.

A planetary gear 33 meshing with the plate cylinder upper gear 31 is provided outside the plate cylinder upper gear 31, and a planetary gear 33 meshing with the plate cylinder lower gear 81 is provided outside the plate cylinder lower gear 81.
Are arranged so as to be rollable with respect to the plate cylinder upper gear 31 and the plate cylinder lower gear 81, respectively. These planetary gears 3
The shafts 33s and 33s are rotatably supported by the shafts 33s and 33s, respectively, and the planetary gears 33 and 33 are connected to each other by connecting links 34 and 34 mounted so as to support the shafts 33s and 33s. They are connected so as to mesh with each other. The plate cylinder upper gear 31 and the upper planetary gear 33 are connected by a connecting link upper 32 so as to mesh with each other. One end of the connection link upper part 32 is rotatably supported on the ink pipe 5, and the other end is rotatably supported on the upper shaft 33s. Further, the plate lower gear 81 and the lower planetary gear 3
3 and 3 are connected by a connecting link lower portion 82 so as to mesh with each other. One end of the lower connecting link 82 is rotatably supported by the lower ink pipe 55 and the other end thereof is rotatably supported by the lower shaft 33s.

Therefore, the upper planetary gear 33 can roll around the plate cylinder upper gear 31 via the upper connecting link 32, and the lower planetary gear 33 can roll around the lower plate cylinder via the lower connecting link 82. 81 can be rolled around, and the planet gears 33, 33 are connected to each other by the connecting links 34, 34.
It is possible to interlock while meshing with each other.

In the figure, one end of the moving rod 35 is attached to the upper connecting link 32 near the upper shaft 33s via a pin 35p that is loosely fitted. Moving rod 35
A female screw (not shown) is formed at the other end of the. In the vicinity of the female screw, a stepping motor having a driving screw portion fixed to the side plate on the side of the stencil printing apparatus main body and having a male screw on a shaft portion to be screwed with the female screw (both not shown).
Is provided. By the rotation of the stepping motor, the moving rod 35 is displaced in the A or B direction in the figure via the screw portion, and the plate cylinder upper gear 31 and the plate cylinder lower gear 51 are moved.
The planet gears 33, 33 roll on the top.

As described above, the gear train including the plate cylinder upper gear 31, the planet gears 33, 33 and the plate cylinder lower gear 81 constitutes a planetary gear mechanism. Here, regarding the number of gear teeth in the gear train, the planet gears 33 have the same number of teeth, and the plate cylinder upper gear 31 and the plate cylinder lower 81 gear both have the same number of teeth and the planet gears 33 have the same number of teeth. Each of them is set to be an integral multiple of the number of teeth. With such a planetary gear mechanism, the up-and-down moving means for adjusting the phase between the upper plate cylinder 1 and the lower plate cylinder 51 is configured.

The up-and-down movement means 170 is operated in a state in which the plate cylinder lower part 51 occupies the non-printing position with respect to the plate cylinder upper part 1. That is, when the moving rod 35 is displaced in the direction A in the figure through the threaded portion by the rotational driving of the stepping motor, the swing displacement of the coupling link upper part 32 in the clockwise direction according to the displacement amount. The planetary gear 33, which is converted into the above, rotates in the clockwise direction while rotating on the upper plategear gear 31 in the clockwise direction, while the planetary gear 33 meshing with the upper plategear gear 31 rotates in the clockwise direction. It is transmitted to the planetary gear 33 meshing with the gear 81 as rotation in the counterclockwise direction, and the lower plate cylinder gear 81 is rotated in the clockwise direction by a predetermined phase angle through the rotation of the planetary gear 33. On the contrary, when the moving rod 35 is displaced in the direction B in the figure, the connecting link 3 is moved in accordance with the displacement amount.
The planetary gear 33, which is converted into the oscillating displacement in the counterclockwise direction 2 and meshes with the plate cylinder upper gear 31, rolls in the counterclockwise direction while rotating on the plate cylinder upper gear 31 in the counterclockwise direction. However, the rotation of the planetary gear 33 is transmitted as a clockwise rotation to the planetary gear 33 meshing with the lower plate cylinder gear 81, and the lower plategear gear 81 rotates counterclockwise through the rotation of the planetary gear 33. Direction is rotated by a predetermined phase angle.

As described above, the phase of the upper plate cylinder 1 on one side can be adjusted with respect to the phase of the lower plate cylinder 51 on the other side. The image forming positions can be aligned with each other.

Rotational transmission between the upper plate cylinder 1 and the lower plate cylinder 51 having the printing start positions set in this manner is performed by the planet gears 33 and the planet gears 33 and the plate cylinder upper gear 31, and the plate cylinder 31. Since the meshing with the underbody gear 81 is set so that the same teeth mesh at the same position, depending on the tooth number ratio, for example, if the ratio is 1: 1, the same teeth always mesh with each other, and 1: 2. Alternatively, if the ratio is 1: 3, the same teeth mesh with each other every two or three rotations, and even if the meshing accuracy including the gear processing accuracy is poor, the plate cylinder 1
Also, a state in which the relative positional relationship between the plate lower parts 51 does not change can be obtained.

In the vicinity of the plate cylinder upper gear 31, a drive motor 30 fixed to the side plate on the side of the stencil printing machine main body and having a drive motor gear 30G meshing with the plate cylinder upper gear 31 on its output shaft is provided. Has been. Upper plate cylinder 1 and lower plate cylinder 5
Reference numeral 1 denotes a drive motor gear 30G, a plate cylinder upper gear 31, a pair of planetary gears 33, 33, and a plate cylinder lower part with the ink pipe 5 and the ink pipe 55 serving as supporting shafts by the rotational driving of the drive motor 30 shown in FIG. By sequentially transmitting the rotational driving force to the gear 81, they are rotationally driven at the same peripheral speed.

In FIG. 1, on the right side of the plate cylinder upper side 1 and the plate cylinder lower side 51 in the figure, there is arranged a sheet feeding device (not shown) capable of feeding the printing paper P stacked on a sheet feeding table (not shown). It is set up. The printing paper P fed from the paper feeding device is picked up by a registration roller 14 including a registration driven roller 14a and a registration driving roller 14b at a timing with respect to a printing start position on the plate cylinder upper side 1 and the plate cylinder lower side 51. The sheet is fed between the upper body 1 and the lower body 51.

On the left side of the plate cylinder upper 1 and the plate cylinder lower 51 facing the sheet feeding device, the plate cylinder upper 1 and the plate cylinder lower 51 are shown on the left side.
A paper discharge device 180 that discharges the printed paper Pa printed in 1 to the paper discharge tray 24 is provided.

In FIGS. 1, 4 and 5, the paper discharge device 1
80 is engaged with each side edge portion Ph in the non-image forming area of the printed paper Pa on the outer peripheral surface of the plate cylinder 1 and
Can be displaced to selectively occupy a separation position for separating the printed paper Pa from the outer peripheral surface of the plate cylinder and a non-separation position separated from the outer peripheral surface of the plate cylinder 1 and are parallel to the generatrix of the plate cylinder 1 And a pair of left and right swing paper ejection claws 2 that are movable in various directions and are provided on the plate cylinder 1 on the downstream side in the paper transport direction X.
1a and 21b are engaged with both side edges Ph in the non-image forming area of the printed paper Pa on the outer peripheral surface of the lower plate cylinder 51 to separate the printed paper Pa from the outer peripheral surface of the lower plate cylinder 51. And a pair of left and right paper ejection claws 23a, 23b that are movable in a direction parallel to the generatrix of the lower plate cylinder 51 and are provided on the downstream side of the lower plate cylinder 51 in the paper transport direction X, and It is movable in a direction parallel to each of the generatrixes of the upper 1 and the lower plate cylinder 51, and both side edges Ph of the printed sheet Pa are pressed against each other, sandwiched and conveyed to the downstream side in the sheet conveying direction X. In order to do so, the paper ejection conveying means 181 provided on the downstream side in the paper conveyance direction X of the rocking paper ejection pawls 21a, 21b and the paper ejection pawl lower portions 23a, 23b, and the rocking paper ejection pawls 21a, 21b.
21b, paper ejection claws 23a and 23b, and paper ejection transporting means 18
1 is mainly composed of a sheet discharge moving unit 182 (see FIG. 7) that moves 1 in a direction parallel to each generatrix of the upper plate cylinder 1 and the lower plate cylinder 51.

Here, as shown in phantom lines in FIG. 1, the separation position means that the tip ends of the rocking and discharging claws 21a and 21b do not interfere with the outer peripheral surface of the plate cylinder 1 and the plate cylinder 1 1. Each side edge portion P in the non-image forming area of the printed paper Pa from the outer peripheral surface of No. 1
It is a position displaced from the outer peripheral surface of the plate cylinder 1 to a position having a minimum gap in the centrifugal direction, which is optimum for engaging with h and stripping the printed paper Pa. Further, the non-separated position means the swing paper ejection claws 21a, 21 as shown by the solid line in FIG.
The position of the tip of b is separated from the outer peripheral surface of the contour of the clamper 7 in the centrifugal direction so as not to interfere with the upper portion of the clamper 7. In addition, in FIG.
9a, 19b, pressing roller lower shaft 19s, paper ejection claw shaft lower 22
The paper ejection claws 23a, 23b and the like are omitted for the sake of simplifying the drawing. Also, the upper plate cylinder 1 and the lower plate cylinder 51
The guide plate upper 13, the guide plate lower 63, which are arranged around the
Plate ejection unit upper 110, plate ejection unit lower 160, registration roller 1
4, rocking paper ejection claws 21a, 21b and paper ejection claws 23a, 2
Needless to say, 3b and the like are arranged at positions that do not interfere with the upper clamper 7, the lower clamper 57, and the like due to the rotational movement of the upper plate cylinder 1 and the lower plate cylinder 51.

The swing paper ejection claws 21a and 21b, the paper ejection claws 23a and 23b, the paper ejection conveying means 181, and the paper ejection moving means 182 will be described in detail below. In FIGS. 4 and 5, the swing paper ejection claws 21a and 21b and the paper ejection claws 23a and 23 are arranged.
Since b is normally arranged symmetrically with respect to the center line CL in the paper transport direction X, the paper transport direction X
On the other hand, the swinging paper ejection pawl 21a disposed on the left side is illustrated, and the rocking paper ejection pawl 21b and the paper ejection pawl lower portion 23b disposed on the right side are omitted.

As shown in FIGS. 1 and 5, the swinging paper ejection pawl 2
The bases of 1a and 21b are supported by the swing paper ejection claw shaft 20 so as to be movable in the axial direction (L and R directions in the drawing). The swingable paper ejection pawl shaft 20 is made of metal such as iron and has a D-shaped cross section. Both ends of the rocking paper ejection claw shaft 20 are rotatably supported by the side plates on the side of the stencil printing apparatus main body,
It is provided parallel to the generatrix of the plate cylinder 1.

The lower paper ejection claws 23a, 23b are oscillated by the movable holders 15a, 15b which will be described later.
It is arranged below 1b. Paper ejection claws 23a, 23b
The base of is supported by the paper ejection claw shaft lower 22 so as to be movable in the axial direction (L and R directions in the drawing). Below the paper ejection claw shaft 22,
It is made of metal such as iron and has a D-shaped cross section. Both ends of the paper ejection pawl shaft lower portion 22 are fixed to the side plates, and are provided in parallel to the generatrix of the plate cylinder lower portion 51. When the lower plate cylinder 51 oscillates and occupies the printing position, the leading ends of the lower paper ejection tabs 23a and 23b come close to the outer peripheral surface of the lower plate cylinder 51 and the printed paper Pa is printed from the lower plate cylinder 51. It is attached to the paper ejection pawl shaft lower portion 22 so as to engage with the side edge portion Ph in the non-image forming area at the front end of the sheet and always occupy the peeling position for stripping the printed paper Pa.

In FIG. 6, reference numeral 183 indicates a swinging paper ejection pawl driving means. The oscillating paper ejection pawl drive means 183 mainly includes a oscillating paper ejection pawl drive arm 66 having a cam 65 and a roller 67, an oscillating paper ejection pawl shaft 20 and a tension coil spring 68, which will be described later. The oscillating paper ejection pawl driving means 183 separates the oscillating paper ejection pawls 21 a and 21 b from the outer peripheral surface of the plate cylinder 1 at a separation position for separating the printed paper Pa from the outer peripheral surface of the plate cylinder 1. It has a function of displacing the separation position to selectively occupy it.

A cam 65 is attached substantially integrally to the outer end of the flange 25b on the plate cylinder 1. The cam 65 has a substantially donut shape, and its outer peripheral surface is projected in the centrifugal direction in the same phase as the upper part 7 of the clamper, and the swinger discharge claws 21a and 21b are provided with a clamper projection for occupying a non-separated position. The part 65a is formed. On the rocking paper ejection claw shaft 20 near the flange 25b on the plate cylinder 1, a roller 67 as a cam follower for a rocking paper ejection pawl, which is driven by the cam 65 at its free end, is rotatably provided. The base end of the paper claw driving arm 66 is fixed. Further, a tension coil spring 68 is provided between a substantially central portion of the swing paper ejection claw driving arm 66 and a pin 69 planted on the side plate. Therefore, the swinging paper ejection pawl drive arm 66 is provided with a habit of turning in the direction in which the cam 65 and the roller 67 are constantly in pressure contact with each other by the tension coil spring 68.

As shown in FIGS. 1 and 4, the sheet discharging and conveying means 181 is rotatably supported at both ends thereof on the side plates on the side of the stencil printing apparatus main body and in parallel with the generatrix of the plate cylinder 1. And a pressing roller drive shaft 18 having a D-shaped cross section which is rotated by a driving means described later, and the pressing roller drive shaft 1.
A pair of left and right pressing rollers 17a, which can move freely on the axis of 8,
17b, a driving means (not shown) for rotationally driving the pressing roller drive shaft 18, and a pressing roller lower shaft 19s, which is provided in parallel with the pressing roller drive shaft 18, and is rotatably supported by the pressing roller upper shafts 17a and 17b. It is mainly configured by a pair of right and left pressing roller lower portions 19a and 19b which are opposed to each other.

The drive means is a rotation transmission member such as a gear (not shown) provided at one end of the pressing roller drive shaft 18,
It is mainly composed of a motor fixed to the side plate and having an output shaft connected to a rotation transmitting member such as the gear. The gear, the belt, etc. may be configured to rotate in synchronization with the main body. The peripheral velocities of the pressing rollers 17a and 17b are set to be slightly higher than the sheet conveying speed by the control of the motor by a controller (not shown), and each side edge portion Ph of the printed sheet Pa is set. Is held and pulled out from between the plate cylinders 1 and 51 so that slack does not occur in the printed paper Pa discharged.

The pressing rollers 17a and 17b are composed of a metal cored bar 17m and a synthetic rubber portion 17g integrally attached to the outer periphery thereof, and slide on the pressing roller drive shaft 18 in the axial direction thereof. An oilless metal is provided on the inner peripheral portion of the cored bar 17m that comes into contact with the metal. A fitting groove 17c is formed on the outer peripheral portion of one end of the core metal 17m. Similarly, the lower presser rollers 19a and 19b are made of metal cored bar 19
A cored bar 19m consisting of m and a synthetic rubber part 19g fixed around it, and rotating around the lower shaft 19s of the pressing roller.
An oilless metal (not shown) is provided on the inner peripheral portion of the. The metal cores 17m and 19m of the pressing roller upper portions 17a and 17b and the pressing roller lower portions 19a and 19b are made of metal such as aluminum. Or, not limited to this,
The oilless metal may be omitted by using a resin such as polyacetal. Further, the synthetic rubber portions 17g and 19g of the pressing roller upper portions 17a and 17b and the pressing roller lower portions 19a and 19b, respectively.
Are made of synthetic rubber such as nitrile rubber or synthetic resin such as polyurethane.

As shown in FIGS. 1, 4 and 7, a pair of main body side plates 44a and 44b as immovable members are arranged on both sides of the paper transport path on the main body side of the stencil printing apparatus. Above the pressing roller drive shaft 18, there is provided a moving shaft screw 16 whose both ends are rotatably supported by the body side plates 44a and 44b. The moving shaft screw 16 has a right screw R on the right side of the center line CL of the paper conveyance path as a boundary.
The S (male thread) and the non-screw forming portion 16R are formed on the left side, and the left screw LS (male screw) and the non-screw forming portion 16L are formed on the left side. One end of the non-screw forming portion 16L of the moving shaft screw 16 is rotatably supported with respect to the main body side plate 44b and is movable in the axial direction thereof. A moving knob 45 having flat knurls is integrally attached to the other end of the non-screw forming portion 16R of the moving shaft screw 16. Further, in the figure of the other main body side plate 44a, a fine movement holder screwing portion 44c formed with a female screw is formed in the lower portion, and a fine movement knob bearing portion 44d is formed in the upper portion thereof. In addition,
The screw of the moving shaft screw 16 may be a screw in a direction opposite to that described above with the center line CL of the paper transport path as a boundary. It is only necessary to form a male thread (right-hand thread, left-hand thread) of the direction.

As shown in FIGS. 1, 4, 5, and 7,
Moving shaft screw 16 inside the body side plates 44a, 44b
Has a pair of left and right moving holders 15 that are movable in the axial direction and are formed with female threads that are screwed into the right-hand thread RS and the left-hand thread LS.
a and 15b are provided. Moving holders 15a, 15
b has a substantially inverted F shape and is made of metal such as aluminum alloy. The moving holders 15a and 15b are attached at positions equidistant from each other in the axial direction of the moving shaft screw 16 with respect to the center line CL of the sheet conveying path. At the center of the movable holders 15a and 15b, the swing paper ejection claws 21a,
The outer peripheral portion of the base end of 21b is rotatably supported. Below the movable holders 15a and 15b, there are paper ejection claws 23a and 2
The outer peripheral portion of the base end of 3b is fixed. The moving holders 15a and 15b are loosely fitted with the fitting grooves 17c of the pressing rollers 17a and 17b.
A and 17b are rotatably supported. Moving holder 15
A lower pressing roller shaft 19s is planted below the a and 15b. Lower presser rollers 19a and 19b are two retaining rings 19 mounted on lower presser roller shafts 19s at both ends thereof.
The movement of the pressing roller lower shaft 19s in the axial direction is restricted by S and 19S, and the pressing roller lower shaft 19s is rotatably supported by the pressing roller lower shaft 19s.

The sectional shapes of the pressing roller drive shaft 18 and the swinging paper ejection pawl shaft 20 are not limited to those described above, but the rotational force thereof can be transmitted and the axial movement thereof can be made. For example, it may be a polygon such as a quadrangle or a spline shape. Similarly, the cross-sectional shape of the paper discharge pawl shaft lower portion 22 is not limited to the above-described one, and the axial movement thereof is possible.
For example, it may be a polygon such as a quadrangle or a spline shape.

Upper pressing roller 17a and lower pressing roller 19
a, and the pressing roller upper 17b and the pressing roller lower 19b,
The support structures described above are provided so that the printed sheets Pa are pressed against each other with a predetermined pressing force in order to grip and convey the printed sheets Pa.

In FIG. 7, reference numeral 182 indicates a paper discharge moving means. The paper discharge moving means 182 is provided with both side edge parts Ph of the printed paper Pa and the swinging paper discharge claws 21a and 21a due to the change of the size of the print paper and the deviation of the paper feed position to the upper and lower plate cylinders 1 and 51.
b, for aligning the paper ejecting claws 23a and 23b and the paper ejecting / conveying means 181.
a, 15b, moving shaft screw 16, moving knob 45, main body side plates 44a, 44b, a fine movement holder 48, a fine movement knob 46, a fine movement knob shaft 46s and a fine movement gear 47 which will be described later.

A fine movement holder 48 is rotatably loosely fitted into the non-screw forming portion 16R at the other end of the moving shaft screw 16. A fine movement holder gear 48a is formed at one end of the fine movement holder 48, and a fine movement holder screw 48b (male thread) that is screwed with the fine movement holder screwing portion 44c is formed at the other end. Non-screw forming portion 16 near the left and right ends of the fine movement holder 48
Retaining rings 48S, 48S that restrict the movement of the fine movement holder 48 in the axial direction are mounted on the R. The fine movement knob bearing portion 44d has a fine movement holder gear 48 at one end thereof.
A fine movement gear 47 that meshes with a is provided with a fine movement knob shaft 46s rotatably provided at the other end with a fine movement knob 46 integrally attached thereto. Reference numeral 44S is a retaining ring that is mounted on the fine movement knob shaft 46s and restricts movement of the fine movement gear 47 in the axial direction.

As described above, since the paper discharge moving means 182 is configured, by rotating the moving knob 45 clockwise or counterclockwise, as shown in FIG. 9, the rocking paper discharge claws 21a and 21b are rotated. , The paper ejection claws 23a and 23b and the paper ejection conveying means 181 are in a direction toward or away from the center line CL of the paper conveying path, that is, the center line CL of the paper conveying path.
On the other hand, they will move to the left and right symmetrical positions together by the same distance. Further, by rotating the fine movement knob 46 clockwise or counterclockwise, as shown in FIG. 10, the rocking paper ejection claws 21a and 21b, the paper ejection claws 23a and 23b, and the paper ejection transporting means 181 can be moved as shown in FIG. The fine movement holder screw 48b moves in the same direction on the left or right by a distance corresponding to the lead to be rotated.

For example, in the case where the printed paper sheet Pa is displaced at a position indicated by an imaginary line for some reason, each side edge portion P of the printed paper sheet Pa is changed.
Although h is also displaced in the same direction, in such a case,
By rotating the fine movement knob 46 of the paper discharge moving means 182 clockwise or counterclockwise by a predetermined amount, the swing paper discharge claws 21a,
21b, paper ejection claws 23a and 23b, and paper ejection transporting means 18
This is convenient because it is possible to easily perform the alignment by moving 1 so as to be aligned with each side edge portion Ph in which the positional deviation has occurred.

In FIGS. 9 and 10, the lower parts of the paper ejection claws 23a and 23b and the lower parts of the pressing rollers 19a and 19b are omitted for the sake of simplicity of the drawings. Will be replaced with the illustration.

Next, the operation will be described with reference to FIGS. First, a document (both not shown) is set in the document reading unit, a plate making start key (not shown) is pressed, and a start signal is sent from a controller (not shown), whereby the drive motor 30 is driven and the plate cylinder 1, plate lower 51
Are rotated in a predetermined direction, respectively, and the used master upper 8 and master lower 58 wound around the plate cylinder upper 1 and the plate cylinder lower 51 are well-known as the plate discharge section upper 110 and the plate discharge section lower 160, respectively. By the operation, it is peeled from each rear end portion, and is discarded / stored in each plate discharge box upper portion 28 and each plate discharge box lower portion 78. Next, the plate cylinder top 1 is rotated to a plate feed position where the clamper top 7 is located substantially right above and stopped, and the clamper top 7 is opened by the opening / closing means to enter the plate feed standby state. finish.

The plate making process is started in parallel with the plate discharging process described above. That is, the original is sent to the original reading unit, and its optical information is converted into an electric signal by a CCD (photoelectric conversion element) (not shown) or the like, and an A / D (analog / digital) converter (not shown), a plate making controller, etc. Via
The heating element is selectively heated by energizing the heating element on the thermal head 10 in a pulsed manner in accordance with the digital image information, and the thermoplastic resin film on the master 8 is selectively perforated to make a plate. Is started. At the same time, by rotating the stepping motor, the platen roller upper 9 and the feed roller upper 11 are rotated, and the master upper 8 is conveyed to the downstream side in the master conveying direction while being pulled out from the master roll upper 8a. To be done.

In this way, the tip of the master 8 on which the plate has been made is guided between the stage 6 and the clamper 7 which are open at the plate feeding position while being guided by the guide plate 13. Depending on the number of steps of the stepping motor, the tip of the master 8 on which the plate has been made is spread on the clamper 7
When it is determined that the master has reached the position, the clamper upper part 7 is closed by the opening / closing means (not shown), and the leading end of the plate-making master 8 is held between the stage 6 and the clamper 7.

After this clamping, the driving of the driving motor 30 restarts the upper plate cylinder 1 in the clockwise direction in the figure at the peripheral speed substantially the same as the master conveying speed of the upper feed roller 11. 8 is wound around the outer peripheral surface of the plate cylinder 1. When it is determined that the plate making is completed based on the number of steps of the stepping motor, the cutter upper 12 is operated and the rear end of the plate upper master 8 is cut.
At the same time, on the platen roller 9 and the feed roller 11
When the rotation of the plate cylinder 1 is stopped, the cut master upper plate 8 that has been cut is pulled out from the plate forming unit 80, and is completely wound around the outer peripheral surface of the plate cylinder 1, and the winding of the plate cylinder 1 is completed. The operation is completed.

When the winding operation of the upper plate cylinder 1 is completed, then the driving motor 30 drives the lower plate cylinder 51 to rotate to the plate feeding position where the lower clamper 57 is located substantially right below, and stops. The lower part of the clamper 57 is opened by the opening / closing means to enter the plate supply standby state. In this way, in the same manner as in the operation on the plate cylinder 1, the plate-making master bottom 58 punched according to the plate-making process of the original to be printed on the other side of the printing paper P and the image information thereof. The winding operation is performed on the plate lower part 51.

When both the plate-making master 8 and the plate-making master lower 58 on the plate cylinder upper part 1 and the plate cylinder lower part 51 are completed, the printing process is started. That is,
One sheet of printing paper P is separated and fed from the paper feeding device, is set at a predetermined timing by the registration roller 14, and is inserted between the upper plate cylinder 1 and the lower plate cylinder 51. When the printing paper P is detected, the solenoid 42 of the plate cylinder arm unlocking means 121 is turned on and the plunger 42p is attracted, so that the locking claws 41c of the stoppers 41, 41 cut the plate cylinder arms 38a, 38b. Notch 38c
When the plate cylinder arms 38a, 38b are rotated in the clockwise direction by the urging force of the tension coil springs 43, 43, the plate cylinder arms 38a, 38b are separated from the outer peripheral surface of the plate cylinder upper portion 1 and occupy the non-printing position. Is rocked and raised to the position indicated by the phantom line. Then, the printing paper P inserted between the upper plate cylinder 1 and the lower plate cylinder 51 is wrapped around the outer peripheral surfaces of the upper plate cylinder 1 and the lower plate cylinder 51, which are rotated in the directions of the respective arrows, and the plate-making completed. By continuously pressing the master upper 8 and the plate-making master lower 58, the plate-making master upper 8 and the plate-making master lower 5
8 is supplied and filled with ink from the inner peripheral surface side of each plate cylinder 1 and the plate cylinder bottom 51, and at the same time, from the ink passage portion of the plate cylinder top 1 and the plate cylinder bottom 51 to the plate-making master 8; The ink passes through the perforated portion of the master-making master lower portion 58 while exuding, and each ink is transferred to both sides of the printing paper P to form a double-sided printed image. At this time, the upper ink roller 2 and the lower ink roller 52 also rotate in the same directions as the upper cylinder 1 and the lower cylinder 51, respectively, so that each ink is applied to the inner peripheral surface of the upper cylinder 1 and the lower cylinder 51. Supply to. Also, during the printing, the swing paper ejection claws 21a, 2a
1b occupies the separation position, and the paper ejection claws 23a and 23b occupy the separation position.

In this way, the printed paper P attached with the ink supplied to the outer peripheral surfaces of the upper plate cylinder 1 and the lower plate cylinder 51.
a (actually attached to the outer peripheral surface of either the upper plate cylinder 1 or the lower plate cylinder 51) is both side edge portions P of the printed paper Pa.
Swinging ejection claws 21a and 21 in which h and Ph occupy the respective separating positions
b, or under the paper ejection claws 23a and 23b occupying the respective peeling positions
By engaging with the leading end of the plate cylinder, it is separated / peeled from the outer peripheral surface of either the plate cylinder upper side 1 or the plate cylinder lower side 51. Next, the motor of the drive means in the paper discharge / conveyance means 181 is rotationally driven in conjunction with the above-described separation / separation operation,
The separated and peeled printed paper Pa is guided and conveyed by pressing both side edge parts Ph and Ph by pressing rollers 17a and 17b and pressing roller lower parts 19a and 19b so that they are pressed and held by each other and rotated. Ejected to the tray 24, each plate-making master upper 8 and plate-making master lower 58
The first printing of the first sheet, which is filled with ink, is called printing. When the printing is completed, the large diameter portion of the cam 40 of the lower plate cylinder supporting means 120 and the roller 39 are engaged with each other, so that the lower plate cylinder 51 is separated from the upper plate cylinder 1 and occupies the non-printing position. The printer returns to the initial state and enters the print standby state. Next, the same number of prints are sequentially and continuously performed by the same paper feeding, printing, and paper discharging operations as those described above.

In the case of single-sided printing, an unmade master is wound around one of the upper plate cylinder 1 and the lower plate cylinder 51, and printing is performed in the same manner as described above.

FIG. 8 shows a modification of the above embodiment. This modification is different from the above-described embodiment only in that a sheet moving means 232 is attached to the sheet feeding device side.

The paper moving means 232 is the paper discharge moving means 18
With respect to the configuration of FIG. 2, guide side plates 49 for aligning and aligning both side edges of the printing paper P instead of the moving holders 15a and 15b.
The only difference is that they have a and 49b. The other structures and functions of the paper moving means 232 are the same as those of the paper discharge moving means 18.
Since it is basically the same as No. 2, a dash (') is added to the end of the reference numeral of each component used in the paper discharge moving means 182.
, And the description of those components is omitted. The guide side plates 49a and 49b are made of a metal such as iron and have a substantially L shape. Guide side plates 49a, 4
9b has left and right female threads (right thread, left thread) opposite to each other that are respectively engaged with moving shaft threads 16 'having left and right external threads (right thread RS', left thread LS ') formed therein. Base end portions 49c, 49d and the base end portions 49c, 49d
It is integrally formed by the paper guide plates 49e and 49f which are vertically provided at d.

The moving knobs 45, 45 'and the fine-moving knobs 46, 46' are connected to each other by a belt member or the like, and the paper discharge moving means 182 and the paper moving means 2 are connected.
32 is configured to interlock with each other, and both side edge portions of the printing paper P, the swing paper ejection claws 21a and 21b, and the paper ejection claw lower portions 23a and 23 are formed.
b, pressing roller upper 17a, 17b and pressing roller lower 19
The positional relationship with a and 19b may be held together. According to this structure, one of the movable knobs 45 and 45 'is connected to the fine movement knobs 46 and 4'.
The operation as described above can be easily and easily interlocked by simply operating one of 6 '.

FIG. 11 shows another modification of the above embodiment.
This modified example is different only in that it has a paper discharge conveying means 281 instead of the paper discharge conveying means 181 of the above-mentioned embodiment.

The discharged paper carrying means 281 is the discharged paper carrying means 18
In contrast to the configuration of FIG. 1, a pair of upper and lower tension rollers 210a and 210b, which are rotatably supported and are provided on the downstream side of the press rollers 17a and 17b and the press roller rollers 19a and 19b in the paper transport direction X, and the press roller rollers. 17a,
17b and the upper tension roller 210a, 210b, which is stretched between the upper conveyor belt 200u, and the lower pressing roller 19a, 19b and the lower tension roller 210a, 2b.
The main difference is that it has a conveyor belt lower portion 200d stretched between 10b.

A belt groove 17d that engages with the upper conveyor belt 200u is provided on the outer peripheral portions of the pressing rollers 17a and 17b, and a lower conveyor belt 2 is provided on the outer peripheral portions of the lower pressing rollers 19a and 19b.
Belt grooves 19d that engage with 00d are respectively formed. Belt grooves 210d that engage with the upper conveyor belt 200u and the lower conveyor belt 200d, respectively, are also formed on the outer peripheral portions of the pair of tension rollers 210a and 210b. The movable holders 15a and 15b extend to the downstream side in the sheet conveying direction X, and a tension roller shaft 210s that rotatably supports the pair of tension rollers 210a and 210b is planted on one side thereof.

Only the characteristic portion of the operation of this modification will be described with reference to FIG. Printed paper P separated / peeled by the swing paper ejection claws 21a and 21b and the paper ejection claws 23a and 23b
The aa is configured to be guided and conveyed by the pressure roller upper portions 17a and 17b and the pressure roller lower portions 19a and 19b being pressed and clamped and rotated at both side edge portions Ph and Ph to each other, and further configured to be pressed to each other. 2 on the conveyor belt
00u and the lower portion of the conveyor belt 200d ensure that the sheet is guided and conveyed at a distance longer than that in the above-described embodiment, and is ejected to the paper ejection tray 24.

According to the embodiment and the modified example, since the pressing roller driving shaft 18 of the pressing roller is provided above the sheet conveying path, as shown in FIG.
Even if the center portion of the printed paper Pa hangs downward due to its own weight, a downward convex bend is generated, and a jam occurs due to a collision between the pressing roller drive shaft 18 and the downward convex bend portion. There is an advantage that can be prevented. In the figure,
Reference numeral Paw is a printed sheet Pa that is not bent.
Shows the state in which a downward convex bend is generated by hanging down due to its own weight. Therefore, it is desirable that the axial distance between the swinging paper ejection pawl shaft 20 and the paper ejection pawl shaft lower portion 22 is wide.

The ink supply means on the plate cylinder 1 is not limited to the ink supply means 100 including the ink roller top 2 and the doctor roller top 3 but may be, for example, JP-A-5-69649.
Even if the one provided with the squeegee blade 41 as described in JP-A No. 62-42873, or the well-known means as described in JP-A-62-42873 and JP-A-63-113670. Good.

The up-and-down moving means is not limited to that of the above-mentioned embodiment, but is constituted by a phase varying means such as the up-and-down position adjusting mechanism 21 using a planetary gear described in JP-A-4-329175. May be.

In the present embodiment, the plate cylinder lower part 51 is configured to come in contact with and separate from the plate cylinder upper part 1, but not limited to this.
The upper plate cylinder 1 may be configured to be movable toward and away from the lower plate cylinder 51. In this case, the swinging paper ejection claws 21a and 21b are arranged on the lower side of the plate cylinder 51, and the lower paper ejection claws 23a and 23b are arranged on the upper side of the plate cylinder, respectively, and the lower plate cylinder support means 120 and the plate cylinder are arranged. A structure similar to the arm lock releasing means 121 may be arranged on the plate cylinder upper side 1.

Although not limited to these, the structure is very complicated, but both plate cylinders are provided with the same structure as the lower plate cylinder supporting means 120 and the plate cylinder arm unlocking means 121. Alternatively, both plate cylinders may be provided so that they can come into contact with and separate from each other. In this case, both paper ejection claws are the rocking paper ejection claws 21 of the above-described embodiment.
Like a and 21b, it is configured to occupy the separated position and the non-separated position, but its swing range can be made small, and the contact and separation swing range of both plate cylinders can be made small.

In this embodiment, the swinging paper ejection pawl 2
1a and 21b, paper ejection claw lower portions 23a and 23b, presser roller upper portions 17a and 17b, and presser roller lower portions 19a and 19b, both side edges Ph in the non-image forming area of the printed paper Pa.
However, the present invention is not limited to this, and they may be arranged on only one side so as to engage only on one side edge portion Ph.

The sheet discharging and conveying means is not limited to those of the embodiment and the modified example, and for example, the pressing roller upper portions 17a and 17b and the pressing roller lower portions 19a and 19 shown in FIG.
Alternatively, b may be a belt pulley, and belts tensioned between the belt pulley and the tension roller pair may be used.

Further, the paper discharge moving means 182 and the paper moving means 232 are not always necessary means in a dedicated machine for printing, for example, only A-size printing paper. In such a special-purpose machine, the paper ejection claws, the paper ejection conveyance means, and the paper guide plate that are fixed in place in the width direction of the paper size with screws, etc. The screw or the like may be loosened and adjusted so as to engage with both side edges of the image forming area.

That is, according to the first aspect of the invention, a pair of plate cylinders are supported rotatably with part of their outer peripheral surfaces facing each other, and a master for stencil printing arranged on the outer peripheral surface of each plate cylinder. It has master locking means for locking the leading end and ink supply means arranged inside each plate cylinder to supply ink to the inner peripheral surface, and at least one of the ink supply means faces the opposite direction. Two plate cylinder supporting means for supporting the plate cylinder on the other plate cylinder so as to be able to come into contact with and separate from the other plate cylinder, and the side edges in the non-image forming area of the printed paper on each outer peripheral surface, By separating and pressing at least two paper ejection claws respectively provided on the downstream sides of the two plate cylinders in the paper transport direction for separating the outer peripheral surfaces from each other and the side edges thereof. Two sheets for conveying to the downstream side in the sheet conveying direction In Sharing, ABS grippers it is sufficient to and a discharge transport means provided on the downstream side of the sheet conveyance direction.

Further, the sheet is not limited to the sheet discharging / conveying means 281 in the other embodiment shown in FIG.
1, the belt groove 17d formed on the pressing rollers 17 and 17b is removed and the pressing rollers 1d shown in FIG.
7 and 17b, and the configuration in which the tension rollers 210a and 210b on the upper side and the conveyor belt upper 200u stretched over the tension rollers 210a and 210b are removed (hereinafter, this configuration will be referred to as "a modified example of the discharge conveying means"). , And the lower tension rollers 210a and 19b and the lower tension roller 210.
200d under the conveyor belt stretched between a and 210b
You may make it guide-convey only only. Further, the present invention is not limited to the modified example of the discharged sheet carrying means, but in addition to the modified example of the discharged sheet carrying means, a suction hole is formed below the carrying belt 200d, and a suction fan and a fan drive motor are provided below the carrying belt below 200d. The structure may be such that a known suction device provided is attached.

That is, the invention according to claim 3 is the paper discharge device in the stencil printing machine according to claim 2, wherein the paper discharge conveying means is provided downstream of the pressing roller pair in the paper conveying direction and rotates. It suffices to have a configuration including at least one tension roller that is freely supported and a conveyor belt that is stretched between the pressing roller pair and the tension roller.

[0094]

As described above, according to the first aspect of the present invention, due to the above configuration and operation, the double-sided printing image surface is rubbed by the transport section, or the sheet discharge section is sewn, as in the conventional sheet discharge apparatus. Thus, it is possible to prevent the printed matter from being soiled by coming into contact with the double-sided printing image surface. Further, since the side edge portion of the printed sheet is sandwiched and conveyed by the sheet discharge conveying means, unstable discharge of the printed sheet can be prevented.

According to the second aspect of the present invention, since the paper discharge conveying means is the pressing roller pair, the side edge portion of the printed paper is surely guided and conveyed by the pressing roller pair, and the printed paper is It is surely discharged.

According to the third aspect of the invention, at least one tension roller provided on the downstream side of the pressing roller pair in the sheet conveying direction and rotatably supported by the pressing roller pair, and the pressing roller pair. Since it is composed of a conveyor belt stretched between the tension roller and the conveyor belt, it is possible to reliably guide and convey while holding the side edge portion of the printed sheet as a supplementary distance with the conveyor belt. Generally, it becomes possible to stably discharge and convey even thin and weak printing paper, and it is possible to discharge and stack printed paper satisfactorily.

[Brief description of drawings]

FIG. 1 is a sectional view showing an overall configuration of a stencil printing machine to which an embodiment of the present invention is applied.

FIG. 2 is an enlarged cross-sectional view of essential parts showing plate cylinder supporting means and plate cylinder arm unlocking means.

FIG. 3 is a side view of essential parts showing an upside-down moving means and a plate cylinder driving means.

FIG. 4 is a side sectional view of a main part showing a configuration around a sheet discharging and conveying unit.

FIG. 5 is a plan cross-sectional view of a main part showing a configuration around a swinging paper ejection claw and a pressing roller.

FIG. 6 is a side cross-sectional view of a main part showing a configuration of a swing paper ejection claw driving means.

FIG. 7 is a partial cross-sectional view showing a configuration of a paper discharge moving unit.

FIG. 8 is a partial plan cross-sectional view of a sheet moving unit showing a modified example of the embodiment.

FIG. 9 is a plan view of a main part for explaining the operation of the paper discharge moving unit.

FIG. 10 is a plan view of a main part for explaining the operation of the paper discharge moving unit.

FIG. 11 is a partial side cross-sectional view of a sheet discharging and conveying unit showing another modified example of the embodiment.

FIG. 12 is a perspective view showing a downward convex bend formed on the lower side of a printed sheet by its own weight.

[Explanation of symbols]

1 On one plate cylinder in a pair of plate cylinders 8 On master as a master for stencil printing 21a, 21b One swinging paper ejecting claw of two paper ejecting claws 23a, 23b The other paper ejecting of two paper ejecting claws Under the nails 17a, 17b Above the pressing rollers constituting the paper discharging and conveying means 18 Under pressure roller driving shafts 19a and 19b constituting the paper discharging and conveying means Below the pressing rollers 51 constituting the paper discharging and conveying means 51 The other plate cylinder in the pair of plate cylinders Lower 58 Master as master for stencil printing Lower 90 Master locking means as master locking means 100 Ink supply means as ink supply means 120 120 Other plate cylinder support means lower in two plate cylinder support means 140 Master Below master locking means as locking means 150 Below ink supply means as ink supply means 170 Upside-down moving means 181,281 Paper discharging and conveying means 182 Paper discharge moving means 183 Oscillating paper discharge claw driving means 200u, 200d Upper and lower conveyor belts as conveyor belts 210a, 210b Tension rollers

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B65H 29/54

Claims (3)

[Claims] 1. A pair of plate cylinders, which are rotatably supported with part of their outer peripheral surfaces facing each other, and a master member for locking the front end of a master for stencil printing, which is arranged on the outer peripheral surface of each plate cylinder. Stop means and ink supply means arranged inside each plate cylinder to supply ink to the inner peripheral surface, and at least one of the plate cylinders and the other of the other in the direction in which the ink supply means face each other. Supporting the plate cylinder so that it can come in and out of contact 2
One plate cylinder supporting means and two sheets of the plate cylinder for engaging the side edges of the non-image forming areas of the printed sheets on the respective outer peripheral surfaces to separate the sheets from the respective outer peripheral surfaces. At least two paper ejection claws respectively provided on the downstream side in the transportation direction, and two paper ejections for transporting to the downstream side in the paper transportation direction by rotating and pressing the side edge portions against each other. A paper ejection device in a stencil printing apparatus, comprising: a paper ejection transporting unit provided on a downstream side of the claw in the paper transporting direction. 2. The sheet discharging device in the stencil printing apparatus according to claim 1, wherein the sheet discharging conveying means is a pressing roller pair. 3. The sheet discharging device of the stencil printing apparatus according to claim 2, wherein at least one sheet discharging conveying unit is provided on the downstream side of the pressing roller pair in the sheet conveying direction and is rotatably supported. A tension roller and a conveyor belt stretched between the pressing roller pair and the tension roller.