JPH06328831A - Stencil plate making printer - Google Patents

Abstract

PURPOSE:To provide a stencil plate making printer free from a transporting trouble in supplying/discharging a plate and a setting trouble including a jam processing and miniaturized by using a stencil plate master. CONSTITUTION:The printer comprises a printing drum 30 to be wound with a stencil plate master 1a on the peripheral surface thereof; an ink supply device 230; a plate supply roll 1 for supplying the stencil plate master to the printing drum 30; and a plate supply device 80 which can revolve around the same shaft as a rotation center shaft 31 with respect to the printing drum and supports the plate supply roll. The printer further comprises a thermal head 3 supported on a printer body for making the stencil plate master; a clamper 19 clamping the top of the stencil plate master; a plate discharge means 100 supported on the printer body for releasing the used stencil plate master from the peripheral surface of the printing drum and containing the same; and a cutter device 150 supported on the printer body in the vicinity of the plate discharge means for cutting the released stencil plate master.

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.

[0002]

2. Description of the Related Art In a conventional stencil type plate making and printing apparatus, a master made of a thermoplastic synthetic resin film laminated with Japanese paper as a porous flexible support at the plate making section and plate making section is the outer periphery of its core tube. A master is supplied from a roll-shaped plate supply roll formed by being wound on a sheet, and the master is conveyed while being pressed against a thermal head by a platen roller to perform heat-sensitive perforation plate making, and further conveyed by a conveying roller. The plate is cut by a cutter unit at the end of plate making, and the leading end of the master is held by the clamper of the printing drum for each plate and wound around the outer circumference of the printing drum. However, recently, in order to improve the print image quality and reduce the cost of the plate itself, a master for stencil substantially consisting of a thermoplastic synthetic resin film is being used. Since such a stencil master has a weak waist, it is difficult to adopt the conventional method of feeding and conveying the plate by utilizing the strength of the master itself.

To solve such a problem,
For example, as shown in Japanese Patent Laid-Open No. 62-73987, a stencil master is used without being cut, and a stencil master supply section, a plate making section and a plate discharge winding section are all provided on the outer periphery of a plate cylinder. Therefore, a method of rotating with the plate cylinder has been proposed.

[0004]

However, the above technique has the following problems.

(1) It is very difficult to set and operate the master for stencil on the plate discharge roll (plate discharge winding section) (at the time of initial setting and jamming). In particular, when jammed, the stencil master is connected, so it is difficult to process, and the operator must manually cut the stencil master for processing.

(2) At the time of printing, since the printing drum rotates while holding not only the plate supply roll but also the plate discharge roll, its inertia becomes large, the rotation balance is largely lost, and high-speed printing cannot be performed.

(3) Although the plate supply unit (plate mounting / discharging unit) has a motor for rotating and driving the plate discharging roll, the rotational force transmitting portion between the plate discharging roll and the motor is detachable, or the connector of the power supply line to the motor. An attachment / detachment mechanism is required.

(4) Since the plate discharge roll is a system in which the used stencil master having printing ink adhered to the printing drum (plate cylinder) is sequentially wound, the used plate master is wound up. Has an outer diameter larger than that of the plate feed roll, so that the relief amount of the printing pressure roller (press roller) must be increased, which complicates the mechanism.

(5) A complicated mechanism is required to automatically set the initial winding of the stencil master on the printing drum.

Therefore, in order to solve the above problems, the present invention uses the master for stencil and simplifies the mechanism without difficulty in feeding and discharging the plate and difficulty in setting including jam processing. It is an object of the present invention to provide a stencil-type plate-making printing apparatus capable of performing high-speed printing and at the same time reducing the size of the apparatus.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a printing drum having a stencil master wound around an outer peripheral surface thereof and rotating around a rotation center axis. An ink supply device that supplies ink to the inner peripheral surface of the printing drum, a plate supply roll around which the stencil master is wound, and that supplies the stencil master to the printing drum, and the same axis as the rotation center axis. A plate feeding unit that is rotatable around the printing drum and that supports the plate feeding roll; a thermal head that is supported by the printing apparatus main body and that makes the stencil master; and an outer peripheral surface. An openable / closable clamper, which is provided on the outer edge of the stencil master, holds the tip of the stencil master from the outer peripheral surface, and the used stencil master supported on the printing apparatus main body side. Peel off A plate discharging means for housing, and configured to have been supported by the printing apparatus main body side provided in the vicinity of the plate discharge means, a cutting means for cutting the peeled already stencil master, a.

According to a second aspect of the present invention, in the stencil plate making and printing apparatus according to the first aspect, the plate is provided in the vicinity of the plate feed roll supported by the plate feed unit and is supplied from the plate feed roll. A platen roller for winding the stencil master around a part of the peripheral surface, a plate making position for bringing the thermal head into contact with the platen roller through the stencil master during plate making, and a platen roller for separating from the plate making position during plate making. A thermal head contacting / separating mechanism for selectively displacing the thermal head with the plate making position, a peeling position for displacing the used stencil master on the outer peripheral surface by displacing the plate discharging means at the time of plate discharging, and at the time of plate discharging A plate discharging means displacement mechanism for selectively displacing the plate discharging means to a non-peeling position separated from the peeling position, and the plate discharging position by displacing the cutting means during plate discharging. Are cutting means displacing mechanism for selectively displacing said cutting means during the cutting position and a non-plate discharge in the non-cutting position spaced from said cutting position located in the vicinity of, a configuration having.

According to a third aspect of the present invention, in the stencil printing machine according to the first or second aspect, the plate discharging means has a pair of plate discharging rollers that rotate in pressure contact with each other. A cutter for cutting the peeled stencil master is provided immediately before the holding portion of the peeled stencil master immediately upstream of the holding portion or immediately downstream of the holding portion.

According to a fourth aspect of the present invention, a stencil master is wound around an outer peripheral surface of the printing drum to rotate about a rotation center axis, an ink supply device for supplying ink to the inner peripheral surface of the printing drum, The stencil master was wrapped around,
A plate supply roll that supplies the stencil master to the printing drum, and a plate supply unit that is rotatable with respect to the printing drum about the same axis as the rotation center axis and that supports the plate supply roll, A thermal head for making the stencil master, which is supported on the main body of the printing apparatus, and an openable / closable clamper, which is provided on the outer peripheral surface, holds the tip of the stencil master between the outer peripheral surface. And a plate discharging means supported on the printing apparatus main body side for storing the used stencil master by peeling it from the outer peripheral surface, and the plate discharging means is a pair of plate discharging rollers rotating in pressure contact with each other. And a cutter that cuts the separated stencil master on one outer peripheral portion of the plate discharge roller and that can be controlled to switch between a severable state and a non-securable state.

[0015]

According to the invention described in claim 1, with the above structure, the plate feeding roll is supported at a position close to the circumference of the printing drum by the plate feeding unit capable of detaching the plate feeding roll, Since the clamper that holds the tip of the stencil master on the outer peripheral surface is installed, the used stencil master is separated from the outer peripheral surface of the printing drum by the plate discharging means and stored at the end of the plate discharging process. The stencil master is cut by the cutting means. Further, except at the time of initial setting, the leading end of the master is always wound around the printing drum.

According to the second aspect of the present invention, the thermal head includes the thermal head contacting / separating mechanism, the plate discharging means displacing mechanism, and the cutting means displacing mechanism. The plate is selectively displaced between a plate making position where the plate is brought into contact with the stencil master through the stencil master and a non plate making position where the plate making position is separated from the plate making position at the time of non plate making. Further, the plate discharging means is selectively displaced by the plate discharging means displacement mechanism between a peeling position for peeling the used stencil master on the outer peripheral surface of the printing drum at the time of plate discharging and a non-peeling position separated from the peeling position for non-plate discharging. Further, the cutting means is selectively displaced by the cutting means displacement mechanism between a cutting position located near the plate discharge position during plate discharge and a non-cut position separated from the cutting position during plate discharge.

According to the third aspect of the present invention, at the end of the plate discharging process, the peeled stencil master peeled by the plate discharging means having a pair of plate discharging rollers that rotate in pressure contact with each other is held between the plate discharging rollers. Is cut by a cutter for cutting the peeled stencil master provided immediately before the upstream side or immediately after the downstream side of the holding portion.

According to the fourth aspect of the invention, the peeled stencil master is cut by the cutter provided on one outer peripheral portion of the plate discharge roller pair.

[0019]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a main part configuration diagram of a stencil type plate making and printing apparatus showing an embodiment of the present invention. First, the overall configuration will be described.

In FIG. 1, reference numeral 200 is a stencil-type plate-making printing apparatus, and reference numeral 201 is a frame arranged at a predetermined position of the stencil-type plate-making printing apparatus 200. This stencil-type plate-making / printing apparatus 200 is provided with a printing drum 30 which is supported by a frame 201 and which is wound around an outer peripheral surface thereof with a stencil master 1a and which rotates around a rotation center axis 31, and an ink on the inner peripheral surface of the printing drum 30. Ink supply device 230 for supplying
And a stencil master 1a wound around the stencil master 1a for supplying the stencil master 1a to the printing drum 30, and rotatable about the same axis as the rotation center shaft 31 with respect to the printing drum 30. Plate feeding unit 8 supporting the plate feeding roll 1
0 and the stencil master 1a supported on the printing apparatus main body side
A thermal head 3 for plate making, an openable and closable clamper 19 provided on the outer peripheral surface of the printing drum 30 for holding the tip of the stencil master 1a between the outer peripheral surface of the printing drum 30, and the printing apparatus main body. Provided on the side of the printing apparatus main body side and provided near the printing apparatus main body, which is supported by the printing apparatus main body side, and which is supported by the printing apparatus main body side. It is mainly composed of a cutter unit as a cutting means 150 for cutting the peeled stencil master.

The printing drum 30 and the plate feeding unit 8
0 constitutes the drum unit 240, and the plate discharge device 100 and the cutter unit 150 form the plate discharge unit 140, respectively. The drum unit 240 is attachable / detachable from the printing apparatus main body side via the frame 201 by an attaching / detaching device (not shown).

Hereinafter, the printing drum 30 and the ink supply device 2
The configurations of 30, the plate supply roll 1, the plate supply unit 80, the thermal head 3, the clamper 19, the plate discharge device 100, and the cutter unit 150 will be sequentially described based on the following embodiments.

Example 1 Example 1 will be described in detail with reference to FIGS. 1 to 8. In FIG. 1 or FIG. 3, an ink-permeable porous support cylinder 32, which is long in the direction of the rotation center axis 31, is provided on the outer periphery of the printing drum 30, and the support cylinder 32 has 0 A mesh screen 33 having a thickness of 1 mm is wound. As shown in FIG. 1, the rotation center shaft 3 is provided at a predetermined position on the outer peripheral surface of the printing drum 30.
A clamper 19 having an axis 19s extending in the axial direction is disposed in parallel with 1. The clamper 19 has a rubber-like magnet at an engaging portion with the stencil master 1a, and is opened by an opening / closing drive mechanism (not shown) during plate making and printing other than initial setting of the plate feed roll 1. . On the outer peripheral surface of the print drum 30 that is avoiding the periphery of the clamper 19 on the side of the pivot shaft 19s, a print image forming area A where the ink supplied to the inner peripheral surface of the print drum 30 bleeds to the outer peripheral surface to enable printing. (Indicated by the one-dot chain line in the figure) is formed over a range of about 270 °.

In FIG. 1, FIG. 2, FIG. 3 or FIG. 4, the print drum 30 has a drum shaft 3 integrally formed at both ends thereof.
5, the rotation center shaft 31 is rotatably supported by the rotation center shaft 31 via a bearing 34, and is rotated by a rotation drive mechanism described later. A pair of plate feeding arms 17a and 17b (hereinafter, referred to as “plate feeding arm pair 17a and 17b”) sandwiching the printing drum 30 on both drum shafts 35 is provided with a plate feeding bearing 36 via a rotation center shaft 31. Are rotatably arranged.
A drum gear 37 is integrally formed on one end side of the drum shaft 35. The shaft portion 17as of the plate feeding arm 17a is internally provided with a slip clutch 38 which is selectively driven to rotate integrally with the drum shaft 36 except during plate discharge and plate making described later. The slip clutch 38 is supplied from the platen roller 2 and wound on the outer peripheral surface of the printing drum 30 when the tension of the stencil master 1a becomes about 1 kgf.
The transmission torque is variable so that the peripheral speed of the printing drum 30 is set to be the same as the peripheral speed of the platen roller 2, and the printing drum 30 or the drum unit 240 is used except when the plate is discharged.
It does not slip even if it rotates. Therefore,
The plate feeding arm pair 17a, 17b has a slip clutch 38
Can be rotated separately from the printing drum 30 by operating the. The clutch 38 is manually disengaged for manual operation at the time of jam. A drive motor (not shown) fixed to the machine frame of the frame 201 is arranged outside the drum gear 37, and a drum drive shaft 40 is connected to the drive motor (not shown). The drum drive shaft 40 is substantially integrally provided with a drive gear 39 having a tooth portion which is constantly meshed with the drum gear 37.

In FIG. 1, each plate feeding arm 17a, 17
Each shaft 17as, 17bs (shown in FIGS. 2, 3 and 4 and not shown in FIG. 2) of b is sandwiched by each plate feeding arm 17a,
In the opposite direction of 180 ° from 17b, a rotating balancer 10 made of steel is provided substantially integrally with the shafts 17as and 17bs. The rotating balancer 10 has a substantially fan shape, and has a size and a size that balance with a rotation moment of the plate feeding unit 80 with respect to the drum shaft 35 (shown in FIG. 3 and not shown in FIG. 3) of the plate feeding unit 80. Weight is set. As will be described later, in the stencil-type plate making / printing apparatus 200, only the printing drum 30 rotates at a low speed when the plate is discharged, and the printing drum 30 and the plate feeding unit 80 integrally rotate at a high speed during printing. At this time, as described above, since the rotating balancer 10 is provided on each of the plate feeding arms 17a and 17b, the drum unit 2
As for 40 as a whole, the balance during rotation is improved and the load fluctuation during rotation is reduced, so that more stable high-speed printing can be performed.

As shown in FIG. 1, the ink supply device 230.
Are arranged inside the print drum 30 and supply ink to the inner peripheral surface of the print drum 30, and are arranged in parallel with the ink supply roller 22 with a minute gap therebetween. Ink pool 24 between
And the ink supply shaft 31 that also serves as the rotation center shaft 31 of the printing drum 30 and that supplies ink from the ink supply pipe 31a to the ink reservoir 24.

As shown in FIG. 1 or 5, a printing pressure roller 25 is rotatably provided around a shaft 26 in the vicinity of the lower portion of the outer peripheral surface of the printing drum 30 facing the ink supply roller 22. The shaft 26 is supported by a pair of arms 27 arranged at both ends of the shaft 26, and the arms 27 swing around a shaft 28 attached to an immovable member (not shown) on the main body side of the stencil printing plate making apparatus 200. It is movably supported. The printing pressure roller 25 is provided in order to avoid contact between the printing position in which the printing image forming area A of the printing drum 30 is pressed through the printing paper P at the time of printing and the plate feed roll 1 and the clamper 19 at the time of non-printing. The non-printing position retracted from the outer peripheral surface of the is selectively occupied. Axis 28
In the vicinity of the right side of the figure, a pair of upper and lower paper feed rollers 29a and 29b for conveying the print paper P fed from the upstream side by a paper conveying means (not shown) between the print drum 30 and the printing pressure roller 25. Is provided.

1 or 4, the stencil master 1a
Is composed of a very thin 7 μm thick substantially thermoplastic synthetic resin film, and is wound around the small diameter core tube 1s of the plate feed roll 1 in a continuous sheet form. An antistatic agent is applied to the contact surface of the stencil master 1a with the thermal head 3. Here, the stencil master consisting essentially of the thermoplastic synthetic resin film means that the master for the stencil consists of only the thermoplastic synthetic resin film, and the thermoplastic synthetic resin film contains trace components such as an antistatic agent. In addition, one or more thin film layers such as an overcoat layer are formed on both main surfaces of the thermoplastic synthetic resin film, that is, at least one of the front surface and the back surface. A brake unit 8 for applying a predetermined braking force to each core tube 1s of the plate supply roll 1 is provided above the pair of plate supply arms 17a and 17b, and the plate supply roll 1 includes the core tubes 1s at both ends. It is rotatably and detachably supported by each brake unit 8 via the above. Therefore, a predetermined braking force is constantly applied to both core tubes 1s of the plate feed roll 1, and a constant tension is always applied to the stencil master 1a pulled out from the plate feed roll 1.
The outer diameter of the supply roll 1 is significantly smaller than that of the conventional one.

The plate feeding arm pair 17a of the plate feeding unit 80,
In the vicinity of the supply roll 1 supported by 17b, a platen roller 2 which winds and conveys the stencil master 1a supplied from the supply roll 1 around a part of its peripheral surface is provided on the plate supply arm pair 17a, 17b. It is provided substantially integrally with the shaft 2s rotatably supported. The platen roller 2 is JI
It is made of an antistatic material made of synthetic rubber having an S hardness of A30 °, and is provided parallel to the rotation center axis 31 and extending in the axial direction thereof.

As shown in FIG. 2 or 7, a gear 44 is provided substantially integrally with the drive shaft 48 of the platen roller 2. One end of the shaft 2s of the platen roller 2 and the drive shaft 48
Between the shaft end of the pulse motor 4 and the shaft end of
A platen roller clutch 49 is provided for obtaining the rotational driving force from the drive roller 7 and disconnecting the driving force during printing. The machine frame (not shown) at a predetermined position on the side of the frame 201 has one small DC having a rotary drive shaft 46s.
A motor (not shown) is provided, and the plate cam 46 is attached to the rotary drive shaft 46s substantially integrally. Further, a cam follower bracket 47A with a roller 47a that is in contact with the contour peripheral surface of the cam 46 is provided near the cam 46 on the printer body side.

The cam follower bracket 47A has a shape in which arms are projected on a triangular plate, one end of the triangle forms a roller 47a mounting portion, and the base end thereof is a shaft 47.
s is pivotally attached to a stationary member of a machine frame (not shown). The protruding arm-shaped free end of the cam follower bracket 47A is given a turning tendency in the clockwise direction in the drawing by a tension spring 47B locked to an immovable member of a machine frame (not shown). Also, the cam follower bracket 47A
A pulse motor 47 is attached to one end of the protruding arm. The pulse motor 47 is provided with a gear 45 that meshes with a gear 44 that is substantially integral with the rotary drive shaft 45s at a predetermined time.

The plate supply unit 80 mainly comprises a supply roll 1, a brake unit 8, plate supply arm pairs 17a and 17b, and a platen roller 2.

The plate supply unit 80 is locked by a positioning locking means (not shown) at a position relative to the printing apparatus main body shown in FIGS. The positioning locking means (not shown) is provided with a solenoid (both not shown) having a guide pin that is provided in a machine frame (not shown) on the printing apparatus main body side and that can project in a direction parallel to the rotation center axis 31. , A locking hole (not shown) which is provided at the bottom of the plate feeding arm 17b and through which a guide pin (not shown) projects and is fitted. The positioning locking means (not shown) has, for example, the same structure as the first and second positioning locking means described in Japanese Patent Application No. 5-6781 already proposed by the applicant of the present application. Have

As shown in FIG. 6, a plate cam 41 is provided substantially integrally with the shaft 46s of the cam 46 (shown in FIG. 7), and the cam 41 is a DC motor as a driving means (not shown). It is driven to rotate together with the cam 46. Therefore, the cam 41 and the cam 46 can be a single plate cam, and the thermal head 3 is pressed against the platen roller 2 and at the same time, the gear 44 and the gear 45 mesh with each other. In the vicinity of the cam 41 on the printing apparatus main body side, a cam follower bracket 15 with a roller 15a that is in contact with the contour peripheral surface of the cam 41 is arranged.

The cam follower bracket 15 is in the form of an arm and is pivotally attached to the machine frame (not shown) of the printing apparatus main body by a shaft 15s at the center thereof. A roller 15a mounting portion is formed at the base end of the cam follower bracket 15, and a thermal head 3 which is long in the axial direction of the rotation center shaft 31 is mounted at its free end. In addition, at the center of the cam follower bracket 15 on the base end side, the other end of a tension spring 42, one end of which is locked to the machine frame of the printing apparatus main body (not shown), is locked. The thermal head 3 of 15 is given a turning tendency in the counterclockwise direction in the drawing. With the above-described configuration, the thermal head 3 can be brought into contact with and separated from the platen roller 2 via the stencil master 1a at a predetermined operation timing described later. The thermal head 3 is connected to a signal line 43 that sends a digital image signal processed and sent by a document reading device (not shown).

Reference numeral 110 indicates the thermal head 3 during plate making.
A thermal head at a plate making position (shown by a phantom line in the drawing) for bringing the platen roller 2 into contact with the platen roller 2 via a stencil master 1a, and a non-plate making position (shown by a solid line in the drawing) for separating the platen roller 2 from the plate making position during non-plate making. 3 shows a thermal head contact / separation mechanism for selectively displacing 3. Thermal head contact / separation mechanism 11
As described above, 0 is D (not shown) as the driving means.
It is mainly composed of a C motor, a cam 41, a cam follower bracket 15, and a spring 42. In addition, stencil master 1a
When a jam occurs during transportation of the thermal head 3 or the like, the thermal head contact / separation mechanism 110 operates to occupy the non-plate making position of the thermal head 3, that is, the thermal head 3 separates from the platen roller 2.

In FIG. 8, reference numerals 56 and 57 denote a pair of plate discharge rollers which are pressed against each other and rotate. The plate discharge roller pairs 56 and 57 are made of synthetic rubber, are provided to extend in a direction parallel to the rotation center shaft 31, and are connected to the shaft 57s of the plate discharge roller 57 to transmit a rotation transmission member (not shown). Is rotated by a drive motor (not shown). A pair of plate discharge arms 53 made of aluminum alloy is provided at both ends of the plate discharge roller pairs 56, 57, and the plate discharge roller pairs 56, 57 are rotatably supported by both plate discharge arms 53. The base end of each plate ejection arm 53 has a shaft 5 fixed to a machine frame (not shown) on the printing apparatus main body side.
4 is swingably supported by a predetermined angle. A used master storage box 55 for storing the used master 1c is provided between the plate ejection arms 53 so as to extend in parallel with the respective shafts 56s and 57s of the plate ejection roller pairs 56 and 57. At one side end of the storage box 55 located on the downstream side of the holding portion of the separated stencil master 1d of the plate discharge roller pair 56, 57,
A storage opening 59 for receiving the used master 1c separated and conveyed by the plate discharge roller pairs 56 and 57 is provided.

The cutter unit 1 is provided immediately after the downstream side of the holding portion of the separated stencil master 1d of the plate discharge roller pair 56, 57.
50 are provided. The cutter unit 150 supports a cutter motor 61 having a rotary blade 60 for cutting the peeled master 1d, and supports the cutter motor 61 and also uses the cutter motor 61 for each shaft 56 of the plate discharge roller pair 56, 57.
It has a transfer mechanism (not shown) for transferring in the s and 57s directions, that is, in the width direction of the peeled stencil master 1d. The transfer mechanism (not shown) includes, for example, a rail provided on the peripheral wall of the storage box 55 near the slit 58 and a self-propelled mechanism that is attached to the cutter motor 61 and operates in conjunction with the rotation of the rotary blade 60. The cutter motor 61 normally stands by on one side of the arm 53, and the peeled stencil master 1
There is no hindrance to the storage of d in the storage box 55. A rotary blade slit 58, which guides and guides the rotary blade 60 of the cutter motor 61, is opened near the upper portion of the storage opening 59 of the storage box 55.

As shown in FIG. 6, shafts 51s, which are rotatably supported by a machine frame (not shown) on the main body of the printing apparatus, are provided substantially in the center of the rear surfaces of both plate discharging arms 53. Plate cams 51 are provided respectively. Cam 51
Is driven to rotate by a DC motor (not shown) at a predetermined operation timing described later. The free ends of both plate discharging arms 53 are locked at the other end of a tension spring 52, one end of which is locked to the machine frame of the printing apparatus main body (not shown). Is always given a habit of turning clockwise.

Reference numeral 120 indicates a peeling position (shown by a virtual line in the drawing) for displacing the used stencil master on the outer peripheral surface of the printing drum 30 by displacing the plate discharging device 100 at the time of discharging the plate and separating from the peeling position for not discharging the plate. A plate discharge means displacement mechanism for selectively displacing the plate discharge device 100 at the non-peeling position (shown by a solid line in the drawing) is shown. As described above, the plate discharging means displacement mechanism 120 is mainly composed of the DC motor, the cam 51 and the spring 52 which are not shown.

Reference numeral 130 indicates the cutter unit 1 when the plate is discharged.
The cutter unit 150 is selectively placed between a cutting position (shown by a virtual line in the drawing) located near the plate discharge position by displacing 50 and a non-cutting position (shown by a solid line in the drawing) separated from the cutting position during non-printing. 3 shows a cutting means displacement mechanism for displacing the cutting means. The cutting means displacement mechanism 130 is the plate discharge means displacement mechanism 1.
Similar to 20, a DC motor, a cam 51, and a spring 52 (not shown) are mainly included.

When a jam occurs during the transportation of the stencil master 1a, the plate discharging means displacing mechanism 120 and the cutting means displacing mechanism 130 respectively operate to the non-peeling position and the non-cutting position, that is, the plate discharging device 100 and the cutter. The unit 150 is separated from the printing drum 30.

(Operation of Embodiment 1) Next, the operation of this stencil plate making and printing apparatus will be described below.

In FIGS. 13 to 33 described below,
Illustration of the brake unit 8, the rotation balancer 10, the ink supply device 230, the frame 201 on the printer main body side, etc. provided in the plate supply unit 80 is omitted for the sake of simplifying the description. First, at the time of initial setting for setting a new plate feed roll 1 in the plate feed unit 80, as shown in FIGS. 13 to 14, the drum unit 240 is removed from the printing apparatus main body (not shown),
A new plate feed roll 1 is set on the plate feed arm pair 17a, 17b via a brake unit (not shown), and the tip of the stencil master 1a is passed over the upper peripheral surface of the platen roller 2 and held to the position of the clamper 19. come. At this time, since the braking force is applied to the shaft 1s of the plate feed roll 1 by a brake unit (not shown), a predetermined tension is applied to the stencil master 1a pulled out from the plate feed roll 1 to cause wrinkles. It can be brought to the position of the clamper 19 without being generated. In this state, stencil master 1
The tip of a is clamped by the clamper 19. Next, as shown in FIG. 15, the drum unit 240 is set in the printing apparatus main body (not shown) of the stencil printing machine 200. At this time, since the thermal head 3, the plate discharge unit 140, and the printing pressure roller 25, which are supported by the printing apparatus main body side (not shown), are separated from the drum unit 240, problems such as interference do not occur. The plate feeding unit 80 is locked at a position shown in the figure by a positioning locking means (not shown). That is, when a solenoid having guide pins (both not shown) is turned on, the solenoid is inserted into a not-shown locking hole of the plate feeding arm 17b, and the not-shown solenoid is turned off to release the locking. In the subsequent operations, the description of the locking and releasing operations of the plate feeding unit by the positioning locking means will be omitted.

Next, as shown in FIGS. 16 to 17, the plate feeding unit 80 remains in the position shown in FIG.
The direction of the arrow in which only 0 is indicated by a solid line (hereinafter, indicated by a solid arrow when only the printing drum 30 rotates, is indicated by a thick arrow when the printing drum 30 and the plate feeding unit 80 rotate together) (counterclockwise) The master 1a for stencil is wound around the printing drum 30 by rotating about 270 ° in the direction). At this time, since the braking force is applied to the shaft 1s of the plate supply roll 1 by a brake unit (not shown), a predetermined tension is applied to the stencil master 1a that is pulled out from the plate supply roll 1 and wound around the printing drum 30. Therefore, it can be wound around the print drum 30 without generating wrinkles.
Further, only the printing drum 30 is rotated by the driving force supplied from the driving motor, the drum driving shaft 40, and the driving gear 39 (shown in FIG. 2 and not shown in FIG. 2) mounted on the printing apparatus main body side, and the plate feeding The unit 80 includes a slip clutch 38 (see FIG. 2).
3 and (not shown in FIG. 3), the continuation with the printing drum 30 is interrupted and the printing apparatus is fixed to the printing apparatus main body side.

Next, in FIGS. 17 to 23, since it is unknown whether the ink is evenly distributed on the outer surface of the printing drum 30, the ink is uniformly exuded to the outer surface of the printing drum 30 and the master 1a for stencil printing. In order to attach the ink to the outer peripheral surface of the printing drum 30 by the surface tension (adhesive force) of the ink, so-called plate-making is performed. 17, the plate supply unit 80 and the printing drum 30 are rotated together in the direction of the thick arrow in the drawing until the positional relationship shown in FIG. 18 is reached. At this time, the plate supply unit 80 is in a state of being continued to the printing drum 30 by the slip clutch 38 (shown in FIGS. 3 and 4).

In FIG. 19, the press roller 25, which is spaced downward from the outer peripheral surface of the printing drum 30, is replaced by the arm 2
7 (not shown in FIG. 5) is moved upward as indicated by an arrow, and the stencil master 1a wound around the outer peripheral surface of the printing drum 30 is pressed to cause the printing drum 30 to move. The ink bleeds from the inner peripheral surface of the outer peripheral surface of the printing drum 30 and is transferred to the rear surface of the stencil master 1a. At this time, the ink supply roller 22 (shown in FIGS. 1 and 5) also rotates in the same direction as the rotation direction of the printing drum 30, and supplies ink to the inner peripheral surface of the printing drum 30. From the state shown in FIG. 20 to the state shown in FIG. 22, the plate feeding unit 80 and the printing drum 30 are integrated, that is, the drum unit 240.
Is rotated one or more times in the clockwise direction indicated by the thick arrow.
During this period, as shown in FIG. 21, when the plate supply unit 80 of the drum unit 240 rotates in the vicinity of the printing pressure roller 25, the printing pressure roller 25 avoids interference with the plate supply unit by the arm 27 (shown in FIG. It is moved downward as shown by the arrow by swinging (not shown in the figure). That is,
In the print image forming area A (shown in FIG. 1), the printing pressure roller 2
Reference numeral 5 sandwiches the stencil master 1a through a printing paper P (both shown in FIG. 5) fed from a pair of paper feed rollers 29a and 29b, and is pressed against the printing drum 30 by the clamper 19
Non-image forming area around the plate feeding roll 1 and platen roller 2
It is separated from the print drum 30 so as not to interfere with the above.
Next, until the state shown in FIG.
The press roller 25, which was spaced downward from the outer peripheral surface of
By swinging the arm 27 (shown in FIG. 5 and not shown in the figure), the arm 27 is moved upward again as indicated by an arrow, and the stencil master 1a wound around the outer peripheral surface of the printing drum 30 is pressed to plate the plate. To be done.

After the printing is completed, as shown in FIG. 23, the clamper 19 that clamps the tip of the stencil master 1a spreads out about 180 ° in the direction of the arrow in the figure around the pivot 19s. The leading end of the stencil master 1a is opened. At this time, since the stencil master 1a is held on the outer peripheral surface of the printing drum 30 by the surface tension (adhesive force) of the ink, it does not peel off from the outer peripheral surface of the printing drum 30.

Next, in FIGS. 24 to 28, plate making and plate discharging are performed at the same time. When a plate making start key (not shown) is turned on, first, in FIG.
0 is positioned and fixed with respect to the printer main body. Next, the thermal head 3 moves the thermal head contact / separation mechanism 110.
By the operation (shown in FIG. 6), the platen roller 2 is displaced to the plate making position where it comes into contact with the platen roller 2 via the stencil master 1. That is, as shown in FIG. 6, the cam 41 is rotated by the rotation drive of a DC motor (not shown), and the cam follower bracket 15 is moved by the biasing force of the spring 42 so that the cam follower bracket 15 moves in the direction of the arrow (counterclockwise rotation) indicated by a virtual line about the shaft 15s. Direction), the heating element portion of the thermal head 3 (shown by an imaginary line) in the cam follower bracket 15 presses the stencil master 1a against the platen roller 2.

Simultaneously with the above operation, the plate discharging device 100 is in the plate discharging position by the operation of the plate discharging means displacing mechanism 120 (shown in FIG. 6), and at the same time, the cutter unit 150 is in the position of occupying the cutting position by the operation of the cutting means displacing mechanism 130. Each is displaced at the same time. That is, in FIG. 6 or 8, when the cam 51 is rotated by a drive motor (not shown), the arm 53 resists the urging force of the spring 52,
The shaft 54 is rotated in the direction of the arrow (counterclockwise direction) indicated by a virtual line, and the pair of plate discharge rollers 56 and 57 is rotated by the printing drum 3.
The used stencil master 1c on 0 is pressed.

As shown in FIGS. 25 to 27, at the time of plate-making discharge, the driving force supplied from the drive motor, the drum drive shaft 40 and the drive gear 39 (shown in FIG. 2) attached to the printing apparatus main body side. Only the print drum 30 is rotated in the arrow direction (counterclockwise direction), and the plate feeding unit 80 is moved by the slip clutch 38 (shown in FIGS. 3 and 4) to the print drum 3.
It is in a state where the continuation of 0 is cut off and the printer is fixed to the printing apparatus main body side. The platen roller 2 is continued with the drive shaft 48 (shown in FIG. 2) by a clutch 49 (shown in FIG. 2) in order to obtain a driving force from the drive shaft 48 (shown in FIG. 2) on the printer body side. The stencil master 1a supplied from the platen roller 2 is applied with an appropriate tension to the printing drum 3
The number of rotations of the print drum 30 is set so that the peripheral speed (linear speed) of the print drum 30 is higher than the peripheral speed (linear speed) of the platen roller 2 in order to wind around 0. When the tension of the stencil master 1a becomes about 1 kg, the slip clutch 38 (shown in FIGS. 3 and 4) operates so that the peripheral speed of the printing drum 30 becomes the same as the peripheral speed of the platen roller 2.

In the plate-making process, in FIG. 7, the cam follower bracket 47A is rotated by rotating the cam 46, which shares the drive shaft 46s with the cam 41, by rotating the DC motor (not shown), in the direction of the arrow (clockwise direction). Four
The gear 45 is engaged with the gear 44 by being rotated about 7 s. At this time, as the pulse motor 47 is rotationally driven, the gear 44 and the platen roller 2 are rotated in the arrow direction (clockwise direction), and the stencil master 1a is sequentially fed out from the plate supply roll 1 and conveyed. The heat-generating body portion of the thermal head 3 selectively generates heat, and perforation plate making is sequentially performed from the tip of the stencil master 1a.

The discharged plate is a used stencil master 1c shown in FIG. 8 in which the clamp is opened and the tip is free.
However, the plate is continued to be ejected while being held in the sandwiched portion of the pair of rotating plate ejection rollers 56 and 57 and being peeled and conveyed, and then stored in the storage box 55. At this time, the printing pressure roller 25
Is away from the print drum 30 but the print drum 30
In the plate-making stencil master 1b to be wound around, since the ink bleeds to the outer peripheral surface of the printing drum 30 by the plate-making, the plate-made stencil master 1b at the time of winding is not sufficiently wound and peeled off only by the tension of the plate-made stencil master 1b.

As shown in FIG. 28, after the completion of plate making, the thermal head 3 is separated from the platen roller 2 by the operation of the thermal head contact / separation mechanism 110 (shown in FIG. 6), and the drive shaft 48 (FIG. 2) to clutch 4
The continuation is cut off by 9. At the same time, in FIG. 8, the peeled stencil master 1d is the cutter unit 15
The cutter motor 61 of 0 operates and the rotary blade 60 rotates and is transferred in the width direction of the separated stencil master 1d to be cut. As shown in FIG. 28,
The plate discharging device 100 and the cutter unit 150 are in a position where the plate discharging device 100 occupies the non-plate discharging position by the operation of the plate discharging means displacement mechanism 120 (shown in FIG. 6), and the cutter unit 150 is not cut by the operation of the cutting means displacement mechanism 130. The positions occupy the positions, that is, the printing drums 30 are simultaneously separated from each other. In FIG. 28, reference numeral 1f
Indicates the tip of the master 1b for plate-making stencil that has been cut and wound around the printing drum 30.

28 to 29, the plate feeding unit 80 and the printing drum 30 are integrated, and the plate feeding unit 80 is fixed to the printing drum 30 by the slip clutch 38 (shown in FIGS. 3 and 4). 29 in the direction of the thick arrow
Is rotated to the position. In FIG. 5 or FIG. 29, the printing process starts, and the printing paper P stacked on the paper feed tray (not shown) is sent toward the paper feed roller pair 29a, 29b by the paper feeding means (not shown), and the paper feeding is further performed. The printing drum 30 by the roller pair 29a, 29b
It is sent between the outer peripheral surface of the printing drum 30 and the printing pressure roller 25 at a predetermined timing synchronized with the rotation of the printing roller 30. And
The printing pressure roller 25, which is spaced downward from the outer peripheral surface of the printing drum 30, moves upward due to the swing of the arm 27,
Ink is printed from the perforated portion of the plate-making stencil master 1b by pressing the printing paper P against the plate-making stencil master 1b wound around the outer peripheral surface of the printing drum 30 rotating in the direction of the arrow in the figure. It is transferred to the surface of the paper P.

At this time, the ink supply roller 22 also rotates in the same direction as the rotation direction of the printing drum 30 to supply the ink to the inner peripheral surface of the printing drum 30. In this way
When the printed printing paper P passes the printing pressure roller 25,
The sheet is peeled off from the outer peripheral surface of the printing drum 30 by a sheet discharge peeling means (not shown), and is discharged and stacked on a sheet discharge tray (not shown) by a sheet discharge conveying means (not shown). When the plate feeding unit 80 approaches the printing pressure roller 25 as shown in FIG. 31 after the printing process of FIG. 30, the printing pressure roller 25 prints so as not to interfere with the plate feeding roll 1 or the platen roller 2. Except for the image forming area A (shown in FIG. 1), it is separated from the print drum 30. Thereafter, the printing process shown in FIG. 32 is completed and the printing shown in FIG. 33 is completed. The subsequent steps of plate making, plate discharging and printing are repeated again from the state shown in FIG.

As described above, according to the first embodiment, it is possible to solve the difficulty of feeding and feeding the stencil master and the difficulty of setting the stencil master, the mechanism can be simplified, and high-speed printing can be performed. Became. Further, since the plate feeding / conveying unit is compactly housed in the vicinity of the printing drum, the apparatus can be downsized as compared with the conventional example.

(Embodiment 2) FIG. 9 shows another embodiment of the present invention. This embodiment differs only in that it has a plate discharge unit 140A instead of the plate discharge unit 140 of the first embodiment. The plate discharge unit 140A is the plate discharge unit 140A.
On the other hand, only the cutter unit 150A is provided instead of the cutter unit 150, and the shape of the storage box 55 is changed to the storage box 55A. The storage box 55A differs from the storage box 55 only in that the peripheral wall in the vicinity of the upper part of the plate discharge roller 57 is removed and that the slit 58 is not provided. In the figure, reference numeral 65 indicates a solenoid. The solenoid 65 has a plunger 65p and is fixed to the inner wall of the storage box 55A of each arm 53 and the peripheral wall of the storage box 55A. Near the inner wall of each arm 53, a movable arm 63 for a heat wire cutter, which is bent in a substantially crank shape, is disposed, and one side portion thereof is swingably supported by a pivot shaft 64 fixed to the arm 53. ing. A base end portion of the movable arm 63 is rotatably connected to a plunger 65p, and a hot wire cutter 62 as a cutter for cutting the separated stencil master 1d is provided at both free ends of the shafts 56s, 57.
It is provided so as to extend parallel to the s direction. Heat wire cutter 6
2 is made of, for example, a nichrome wire. Therefore, the hot wire cutter 62 is provided immediately before the gripping portion of the separated stencil master 1d of the plate discharging rollers 56, 57 on the upstream side of the gripping portion. The solenoid 65, the heat ray cutter movable arm 63, and the heat ray cutter 62 form a cutter unit 150A.

Only the differences between the operation of this embodiment and the operation of the first embodiment will be described. Solenoid 65
Is turned on based on a signal from a control device (not shown),
At the same time when the plunger 65p is sucked and the movable arm 63 is swung, the hot wire cutter 62 is energized and the hot wire cutter 62 heated to a predetermined temperature is swung toward the printing drum 30, and the plate discharging roller pair 56, The peeled stencil master 1d comes into contact with the peeled stencil master 1d, and the peeled stencil master 1d is fused. After fusing the peeled stencil master 1d, the solenoid 65 is turned off and the heat wire cutter 62 is returned to its original position. As described above, according to the second embodiment, it is possible to solve the difficulty of feeding and feeding the stencil master and the difficulty of setting the stencil master, and the mechanism can be simplified.
High-speed printing is also possible. Further, since the plate feeding / conveying unit is compactly housed in the vicinity of the printing drum, the apparatus can be downsized as compared with the conventional example.

(Embodiment 3) FIG. 10 shows still another embodiment of the present invention. This embodiment differs only in that it has a plate discharge unit 140B in place of the plate discharge unit 140A of the second embodiment shown in FIG. The plate discharge unit 140B differs from the plate discharge unit 140A only in that it has a cutter unit 150B instead of the cutter unit 150A. Reference numeral 66 indicates a fixed arm 66 for the heat wire cutter. The fixed arm 66 is bent in a substantially V shape, and each arm 5
A base end portion of each of the inner walls of the third print drum 30 is fixed to the inner wall of the print drum 30. The hot wire cutter 62 is provided at the free end of each fixed arm 66 so as to extend parallel to the directions of the axes 56s and 57s. Therefore, the hot wire cutter 62 is provided immediately before the gripping portion of the separated stencil master 1d of the plate discharging rollers 56, 57 on the upstream side of the gripping portion. Fixed arm 66 for heat wire cutter and heat wire cutter 6
2 constitutes the cutter unit 150B.

Regarding the operation of the third embodiment, only the difference from the operation of the second embodiment shown in FIG. 9 will be described. When the cutting means displacement mechanism 130 (shown in FIG. 6) operates and the heat ray cutter 62 occupies the cutting position shown in FIG. 10, the peeled stencil master 1d is always in contact with the heat ray cutter 62 during plate discharge. , Master for stencil that has been peeled off
In order to maintain constant tension between the print drum 30 and the plate discharge roller pairs 56 and 57, the plate discharge roller pairs 56 and 57 are arranged so that the linear velocity of the plate discharge rollers 56 and 57 is faster than the linear velocity of the print drum 30. The rotation speed (number of rotations) of is set to high. Simultaneously with the completion of the plate discharge, the peeled stencil master 1 in which the heat beam cutter 62, which is energized and heated to a predetermined temperature, is peeled by the plate discharge roller pair 56, 57
The peeled stencil master 1d is melted by coming into contact with d.
After fusing the peeled stencil master 1d, the cutting means displacement mechanism 1
30 (shown in FIG. 6) is activated and the hot wire cutter 62 is returned to the original non-cutting position.

As described above, according to the third embodiment, it is possible to solve the difficulty of feeding and feeding the stencil master and the difficulty of setting the stencil master, the mechanism can be simplified, and high-speed printing can be performed. Became. Further, since the plate feeding / conveying unit is compactly housed in the vicinity of the printing drum, the apparatus can be downsized as compared with the conventional example.

(Embodiment 4) FIG. 11 shows still another embodiment of the present invention. This embodiment is different only in that it has a plate discharge unit 140C instead of the plate discharge unit 140B of the embodiment shown in FIG. Further, the plate discharge unit 140C has a plate discharge device 100B instead of the plate discharge device 100A with respect to the plate discharge unit 140B, and the cutter unit 1
Only the cutter unit 150C is provided instead of 50B. The plate discharge device 100B includes a pair of plate discharge rollers 56 and 7 made of an electric insulator that rotate in pressure contact with each other.
1 and the storage box 55C of the plate discharge device 100B
Has a shape covering the upper half peripheral surface of the plate discharge roller 71.

As shown in FIGS. 11 and 12, a plurality of hot wire cutters 62A for cutting the peeled stencil master 1d extend along the bus bar and are embedded in the outer peripheral portion of the plate discharge roller 71. The heat wire cutters 62A are electrically independent of each other and are provided at both end surfaces of the plate discharge roller 71 with their end surfaces exposed. Arm 5 near plate discharge roller 71
Conductive electrode brushes 72, 72 are offset from the arm 53 and electrically attached to both sides of the arm 3. The electrode brushes 72, 72 are each heat ray cutter 62A.
The electrode brushes 72, 72 are provided with lead wires (both not shown) connected to a power source, respectively, so that a current can be selectively applied. There is. The plate discharge roller 71 having the heat ray cutter 62A on the outer periphery and the electrode brushes 72, 72 constitute a cutter unit 150C.

Regarding the operation of this embodiment, only the difference from the operation of the third embodiment of FIG. 10 will be described. When the cutting means displacing mechanism 130 (shown in FIG. 6) is activated and the hot wire cutter 62A of the cutter unit 150C occupies the cutting position shown in FIG. 11, the plate discharge roller pair 56, 71 which also serves as a component of the plate discharge device 100B is used. The exfoliated stencil master 1 that has been peeled off by wrapping up the tip portion of the stencil master 1c
d is transported into the storage box 55C and stored, but during this plate discharge, no current is applied to the electrode brushes 72, 72,
A current is applied to the electrode brushes 72, 72 immediately before the completion of plate ejection. In this way, the hot wire cutter 62A that is selectively brought into contact with the electrode brushes 72, 72 is energized, and the hot wire cutter 62A heated to a predetermined temperature is brought into pressure contact with the peeled stencil master 1d of the sandwiching portion of the plate discharge roller pair 56, 71. As a result, the peeled stencil master 1d is fused. After fusing the peeled stencil master 1d, the cutting means displacing mechanism 130 (shown in FIG. 6) operates and the cutter unit 150C is returned to the original non-cutting position.

Cutter unit 150C of the fourth embodiment
Needless to say, can be applied not only to a stencil-type plate-making printing apparatus, but also to a plate-making apparatus using a stencil master, a plate discharge apparatus, and the like.

As described above, according to the fourth embodiment, it is possible to solve the difficulty of feeding and feeding the stencil master and the difficulty of setting the stencil master, the mechanism can be simplified, and high-speed printing can be performed. Became. Further, since the plate feeding / conveying unit is compactly housed in the vicinity of the printing drum, the apparatus can be downsized as compared with the conventional example.

In the second to fourth embodiments, the heat wire cutter 6 is used.
Although 2 and 62A are made of nichrome wire, the heat wire cutters 62 and 62A may be coated with a fluororesin film such as Teflon (trade name) as a heat resistant and high mold release film. In this way, by forming a heat-resistant and high-release film on the surface of the heat ray cutter, it is possible to prevent the residue of the stencil master melted on the heat ray from adhering to the stencil master 1d having been peeled off smoothly. It can be carried out.

Although the thickness of the stencil master is 7 μm in the above-mentioned embodiment, it can be used in a good condition even when the thickness is 2 to 10 μm. Further, in the description of the operation of the present invention and the embodiments, it is described that the plate-making process is performed after the plate-supply roll 1 is replaced or after jamming and resetting, but the plate-forming process is not always required. , Ink is the printing drum 3
Needless to say, this may not be performed if the outer surface of 0 is filled with the required amount.

According to each of the above-mentioned embodiments, since the master for stencil making is cut at the end of the plate discharge, the front end of the master for stencil is always on the downstream side wound around the printing drum after the initial setting. As described above, the stencil master does not have to be transported to the printing drum, and there is no difficulty in transportation.

Further, according to each of the above-mentioned embodiments, since the master for stencil is set by using the clamper of the printing drum, the plate discharge as shown in the prior art example (Japanese Patent Laid-Open No. 62-73987). It's easier to set than a roll. Even if a jam occurs and the stencil master is cut, the stencil master shown in the prior art example uses the stencil master wound around the printing drum, and then the front end of the stencil master is discharged. Although there is a problem that it must be attached to the roll by some means, in the present embodiment, it is only necessary to clamp the cut front end portion of the stencil master to the clamper, so that the jam can be easily removed. Even if you jam and the master for stencil can not be cut,
In the prior art example, the thermal head is an obstacle while being close to the platen roller, and the plate discharge roll is also an obstacle, so the jam treatment is difficult. In this respect, according to the present embodiment, the jamming process is easy because the thermal head is separated from the platen roller and the plate discharging unit is separated from the printing drum during jamming.

Further, in the example of the prior art, since the plate discharge roll as well as the plate discharge roll has a large inertia, and the rotational balance is greatly disturbed, it is disadvantageous for high-speed printing, and the relief amount of the printing pressure roller is also large. Although it becomes large and the mechanism becomes complicated, in the present embodiment, the inertia can be reduced because there is no plate discharge roll, and high speed printing is possible by providing the rotation balancer, and the relief amount of the printing pressure roller is increased. Can be made smaller and the mechanism can be simplified, and at the same time, it is advantageous for downsizing the device.

[0073]

As described above, according to the first aspect of the present invention, with the above configuration, the plate feed roll can be attached to and detached from the plate feed roll at a position close to the circumference of the printing drum. A clamper that is supported by the unit and holds the tip of the stencil master on the outer peripheral surface of the printing drum is provided so that the used stencil master is separated from the outer peripheral surface of the printing drum by the plate discharging means at the end of the plate discharging process. The master for the stencil that has been discharged is cut by the cutting means while being stored and stored, and the leading end of the master is always wound around the printing drum except during the initial setting. It is possible to easily perform jam processing for the master for printing. Further, the mechanism is simple, high-speed printing is possible, and there is no difficulty in conveying the stencil master.

According to the second aspect of the present invention, the thermal head includes the thermal head contacting / separating mechanism, the plate discharging means displacing mechanism, and the cutting means displacing mechanism. The plate is selectively displaced between a plate making position where the plate is brought into contact with the stencil master through the stencil master and a non plate making position where the plate making position is separated from the plate making position at the time of non plate making. Further, the plate discharging means is selectively displaced by the plate discharging means displacement mechanism between a peeling position for peeling the used stencil master on the outer peripheral surface of the printing drum at the time of plate discharging and a non-peeling position separated from the peeling position for non-plate discharging. Further, since the cutting means is selectively displaced by the cutting means displacement mechanism between the cutting position located near the plate discharge position during plate ejection and the non-cutting position separated from the cutting position during plate ejection, the jam of the stencil master Processing can be performed easily.

According to the third aspect of the invention, at the end of the plate discharging process, the peeled stencil master peeled by the plate discharging means having a pair of plate discharging rollers that rotate in pressure contact with each other is held between the plate discharging rollers. The cutter for cutting the separated stencil master provided immediately before the upstream side or immediately after the downstream side of the holding part cuts it, so the initial setting of the plate feeding roll and the jam processing of the stencil master are easy. Can be done.

According to the invention described in claim 4, since the separated stencil master is cut by the cutter provided on one outer peripheral portion of the plate discharge roller pair, the initial setting of the plate feeding roll and the jam treatment of the stencil master are performed. Easy to do.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a main part of a stencil plate-making / printing apparatus showing an embodiment of the present invention.

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

3 is a cross-sectional view showing a main part of FIG.

4 is a perspective view showing a main part around the plate supply unit in FIG. 1. FIG.

5 is a side view of essential parts showing the ink supply device and the printing device of FIG. 1. FIG.

FIG. 6 is a side view of essential parts showing a thermal head contact / separation mechanism, a plate discharge means displacement mechanism, and a cutting means displacement mechanism.

FIG. 7 is a side view of essential parts showing a rotation driving mechanism of a platen roller.

FIG. 8 is a cross-sectional view of an essential part of a plate discharge unit showing an embodiment of the present invention.

9 is a cross-sectional view of a main part of a plate discharge unit showing another embodiment of FIG.

FIG. 10 is a cross-sectional view of an essential part of a plate discharge unit showing still another embodiment of FIG.

FIG. 11 is a cross-sectional view of an essential part of a plate discharge unit showing still another embodiment of FIG.

12 is a perspective view showing a further main part of the plate discharge unit of FIG. 11. FIG.

FIG. 13 is a side view of essential parts showing an operation at the time of initial setting for setting a new plate feeding roll in the plate feeding unit.

FIG. 14 is a side view of the essential parts showing the operation at the time of initial setting for setting a new plate feeding roll in the plate feeding unit.

FIG. 15 is a side view of essential parts showing the operation of setting the drum unit in the printing apparatus main body.

FIG. 16 is a side view of essential parts showing the operation of winding the stencil master around the printing drum for printing.

FIG. 17 is a side view of the essential parts showing the operation of winding the stencil master around the printing drum for printing.

FIG. 18 is a side view of the main parts showing the operation of plate making.

FIG. 19 is a side view of an essential part showing the operation of plate making.

FIG. 20 is a side view of an essential part showing the operation of plate making.

FIG. 21 is a side view of the main parts showing the operation of plate making.

FIG. 22 is a side view of the main parts showing the operation of plate making.

FIG. 23 is a side view of the essential parts showing the operation in the printing completion state.

FIG. 24 is a side view of the essential parts showing the operation at the start of plate making and plate discharge.

FIG. 25 is a side view of the essential parts showing the operations of plate making and plate discharge.

FIG. 26 is a side view of the essential parts showing the operations of plate making and plate discharge.

FIG. 27 is a side view of the essential parts showing the operations of plate making and plate discharge.

FIG. 28 is a side view of the essential parts showing the operation at the end of plate making and plate discharge.

FIG. 29 is a side view of the essential parts showing the operation at the start of the printing process.

FIG. 30 is a side view of the main parts, showing the operation of the printing process.

FIG. 31 is a side view of the main parts illustrating the operation of the printing process.

FIG. 32 is a side view of the main parts illustrating the operation of the printing process.

FIG. 33 is a side view of the essential parts showing the operation at the end of the printing process.

[Explanation of Codes] 1 plate feeding roll 1a stencil master 1b plate-making stencil master 1c used stencil master 1d peeling stencil master 2 platen roller 3 thermal head 10 rotation balancer 17a, 17b plate feeding arm pair 19 clamper 30 Printing Drum 31 Ink Supply Shaft 55 / 55A / 55C Also Serving as Rotation Center Shaft Storage Boxes 56, 57, 71 Constituting Plate Discharging Means Plate Discharging Roller Pairs 60 Comprising Plate Discharging Means Rotating Blades 62, 62A Constituting Cutting Means The heat ray cutter 80 constituting the plate 80 plate supply unit 100, 100A, 100B plate discharge device as plate discharge means 110 thermal head contact / separation mechanism 120 plate discharge means displacement mechanism 130 cutting means displacement mechanism 140, 140A, 140B, 140C plate discharge unit 150, 150A, 150B , 150C cutting hand Cutter unit as a step 200 Stencil-type plate making printing device 230 Ink supply device 240 Drum unit

Claims (4)

[Claims] 1. A stencil master wound around an outer peripheral surface thereof to rotate about a rotation center axis, an ink supply device for supplying ink to an inner peripheral surface of the print drum, and the stencil master wound around. Further, a plate feed roll that supplies the stencil master to the printing drum, and a plate feed unit that is rotatable with respect to the print drum about the same axis as the rotation center axis and that supports the plate feed roll. A thermal head for making the stencil master, which is supported on the main body of the printing apparatus, and a front end portion of the stencil master, which is provided on the outer peripheral surface, held between the outer peripheral surface and the opening / closing member. A clamper, a plate discharging unit supported on the printing apparatus main body side for separating and storing the used stencil master from the outer peripheral surface, and provided near the plate discharging unit supported on the printing apparatus main body side. And a cutting means for cutting the separated master for stencil. 2. The stencil plate-making printing apparatus according to claim 1, wherein the stencil master is located near the plate supply roll supported by the plate supply unit and surrounds the stencil master supplied from the plate supply roll. The platen roller wound around a part of the surface, the plate making position where the thermal head is brought into contact with the platen roller through the stencil master during plate making, and the non plate making position where the plate is separated from the plate making position during plate making. A thermal head contact / separation mechanism for selectively displacing the head, and a separation position for displacing the used stencil master on the outer peripheral surface by displacing the plate ejection means at the time of plate ejection, and a separation position at the time of non-plate ejection A plate discharging means displacing mechanism for selectively displacing the plate discharging means to the non-peeling position, and a cutting plate positioned near the plate discharging position by displacing the cutting means during plate discharging. A stencil plate making and printing apparatus comprising: a cutting means displacement mechanism for selectively displacing the cutting means between a cutting position and a non-cutting position separated from the cutting position during non-printing. 3. The stencil-type plate-making printing apparatus according to claim 1, wherein the plate discharging means has a pair of plate discharging rollers that rotate in pressure contact with each other, and the separated stencil master of the plate discharging roller pair. A stencil plate making / printing apparatus, characterized in that a cutter for cutting the separated stencil master is provided immediately before the holding part on the upstream side of the holding part or immediately after the downstream side of the holding part. 4. A stencil master wound around an outer peripheral surface of the printing drum, which rotates around a rotation center axis, an ink supply device for supplying ink to the inner peripheral surface of the printing drum, and the stencil master wound around the stencil master. Further, a plate feed roll that supplies the stencil master to the printing drum, and a plate feed unit that is rotatable with respect to the print drum about the same axis as the rotation center axis and that supports the plate feed roll. A thermal head for making the stencil master, which is supported on the main body of the printing apparatus, and a front end portion of the stencil master, which is provided on the outer peripheral surface, held between the outer peripheral surface and the opening / closing member. A clamper, and a plate discharge means supported on the printing apparatus main body side for storing the used stencil master by peeling it from the outer peripheral surface, and the plate discharge means is a pair of plates which rotate in pressure contact with each other. A hole having a plate discharge roller and having a cutter capable of controlling switching between a cuttable state and a non-cuttable state for cutting the peeled stencil master on one outer peripheral portion of the plate discharge roller pair. Plate-type plate-making printing device.