JP3299407B2 - Stencil type stencil printing machine and master detachable cassette - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stencil-type stencil printing apparatus of an integrated stencil making / printing type and a master detachable cassette for use therein.

[0002]

2. Description of the Related Art In a stencil type stencil printing machine, it is proposed to use a master (hereinafter, simply referred to as "master") consisting essentially of a thermoplastic resin film in order to improve print quality and reduce the cost of the plate itself. Have been. The stencil master used in the conventional stencil type stencil printing machine has a strong stiffness because a porous support such as Japanese paper is bonded to a thermoplastic resin film, making use of the stencil strength of the stencil master itself. There was no problem in feeding the plate to be conveyed to the print drum and wound around the outer peripheral surface of the print drum. The above-mentioned master has a weak stiffness itself, so that wrinkles are likely to occur on the stencil feeding, and it has been difficult to adopt the conventional method of feeding the stencil using the stiffness of the stencil master itself. .

In order to solve the above-mentioned problem, it is considered that a technique as disclosed in Japanese Patent Publication No. 5-70595 is effective, for example, on the premise that the above-mentioned master is used. However, when this technology is adopted, the following problems occur. That is, it is very difficult to set the other end of the master (stencil sheet) on the plate discharging roll (plate discharging winding section).

[0004] When the printing drum rotates while holding a plate discharging roll containing ink in addition to the plate feeding roll at the time of printing, the inertia becomes large, and the rotational balance is greatly lost, so that high-speed printing cannot be performed.

[0005] If the initial setting of the master around the print drum or the setting for jam clearance is to be performed automatically, a complicated mechanism is required.

[0006] In order to solve the above-described difficulties in feeding and setting of the master plate and in setting, and to enable high-speed printing by simplifying the mechanism, the applicant of the present application has previously described the present invention. JP-A-6-328831, Japanese Patent Application No. 5-202
429, JP-A-6-270524, Japanese Patent Application No. 5-3288.
97, Japanese Patent Application No. 5-328988, Japanese Patent Application No. 5-33177
4. New technologies were proposed in Japanese Patent Application Nos. 6-12875 and 6-75139.

[0007]

However, in each of the above techniques, when a master or a discarded master is discarded when a user or an operator performs manual processing in such a device when setting the master or discarding the discharged master. There is a problem.

Therefore, the present invention solves such a problem, and when setting a master or discarding a used master that has been discharged, the setting of the master is made easier and the hands of the user and the like become dirty. It is an object of the present invention to provide a stencil type stencil printing apparatus and a master detachable cassette used therein.

[0009]

According to a first aspect of the present invention, a stencil master is wound around an outer peripheral surface of a printing drum which rotates around a rotation center axis. Ink supply means for supplying ink to the inner peripheral surface of the drum, and one end of the master being wound around a plate supply roll shaft, and the plate supply roll shaft of the plate supply roll supplying the master to the printing drum being detachable. A plate feeding roll shaft supporting means for supporting the master, a plate making means for making the master, and a plate discharging roll of a plate discharging roll for winding the used master from the printing drum while the other end of the master is wound around a plate discharging roll axis. Plate-discharge roll shaft supporting means for detachably supporting a shaft, and the plate-supply roll-shaft support means and the plate discharge roll rotatable around the rotation center axis with respect to the printing drum A plate feeding / discharging unit having supporting means, and a plate feeding roll shaft attaching / detaching means for detachably supporting the plate feeding roll shaft and a plate discharging roll shaft attaching / detaching means for detachably supporting the plate discharging roll shaft. A stencil-type stencil printing apparatus for attaching and detaching the master using a master detachable cassette, wherein the master detachable cassette provided on the main body side of the stencil-type stencil printing apparatus is detachably attached to a master attaching / detaching position. Holding means for holding, plate feeding roll axis attaching / detaching means, plate feeding roll axis moving means for attaching / detaching the plate feeding roll axis to / from the plate feeding roll axis supporting means, plate discharging roll axis attaching / detaching means, and sheet discharging roll Plate discharging roll axis moving means for attaching and detaching the plate discharging roll axis to and from shaft supporting means, plate feeding roll axis moving driving means for driving the plate feeding roll axis moving means, and plate discharging roll axis It is characterized by having a stencil discharge roll axis movement driving means for driving the moving means.

According to a second aspect of the present invention, in the automatic stencil making and printing apparatus according to the first aspect, the master discharge roll shaft is attached to and detached from the master supply roll shaft attaching and detaching means. The plate-supply roll shafts are detachably mounted to each other, and the plate-supply roll axis moving means and the plate-discharge roll axis moving means are constituted by one roll axis moving means, and drive the roll axis moving means. It is characterized by having roll axis moving drive means.

According to a third aspect of the present invention, in the stencil printing machine of the first aspect, the holding means, the plate feeding roll axis moving means, the plate discharging roll axis moving means, and the plate feeding roll axis moving driving means. Further, the plate discharge roll axis moving drive means is disposed on a side of the printing drum in a longitudinal direction of the rotation center axis.

According to a fourth aspect of the present invention, in the stencil printing machine according to the second aspect, the holding means, the roll axis moving means, and the roll axis moving driving means are arranged in the longitudinal direction of the rotation center axis. It is characterized by being arranged on the side of the printing drum.

[0013] The invention according to claim 5 is the invention according to claims 1, 2, and 3.
5. The cassette for attaching / detaching the master according to 4, wherein the plate feeding roll shaft attaching / detaching means includes a plate feeding roll shaft guide groove smaller than an outer diameter of the plate feeding roll shaft; A plate feed roll shaft fixing portion for supporting the plate feed roll shaft so that it cannot rotate; a plate discharge roll shaft guide groove smaller than the outer diameter of the plate discharge roll shaft; It is characterized in that the guide groove is provided with a plate discharge roll shaft fixing portion for supporting the plate discharge roll shaft in a non-rotatable manner.

According to a sixth aspect of the present invention, in the cassette for attaching / detaching the master according to the fifth aspect, a rotation transmitting member for transmitting a rotational driving force to the plate discharge roll shaft is detachably provided at one end of the plate discharge roll shaft. It is characterized by.

According to a seventh aspect of the present invention, in the master detachable cassette according to the fifth or sixth aspect, the plate feeding roll shaft, the plate discharging roll shaft, and the master detachable cassette are all made of a combustible material. It is characterized by.

According to an eighth aspect of the present invention, in the master detachable cassette according to the fifth or sixth aspect, the plate feeding roll shaft attaching / detaching means and the plate discharging roll axis attaching / detaching means are stronger than the main body of the master attaching / detaching cassette. It is made of large material,
And it is characterized by being separably connected to the main body.

According to the ninth aspect of the present invention, there is provided an image processing apparatus comprising:
9. The cassette for attaching and detaching a master as described in 8 above, wherein a main body of the cassette for attaching and detaching a master is provided with an opening / closing cover that can be opened and closed in a state where the plate feeding roll and the discharge roll are housed. Can be set on the holding means with the open / close cover open,
After the use of the master detachable cassette, the open / close cover can be closed.

According to a tenth aspect of the present invention, in the master mounting / removing cassette according to the ninth aspect, after the master mounting / removing cassette is used, the used plate discharging roll shaft and the used plate supplying roll shaft are attached to the main body. When reset,
An automatic closing means for automatically closing the opening / closing cover is provided near an opening / closing portion of the opening / closing cover.

The invention according to claim 11 is the invention according to claim 9 or 1
0, wherein the open / close cover has a double-opening structure.

According to a twelfth aspect of the present invention, in a stencil printing machine for attaching and detaching the master using the master attaching and detaching cassette according to the eleventh aspect, a cross section of the holding means has a state in which the opening / closing cover is opened. And a substantially hat-like shape for holding both of the openable and closable covers.

[0021]

According to the first aspect of the present invention, there is provided a master having a plate feeding roll shaft attaching / detaching means for detachably supporting a plate feeding roll shaft and a plate discharging roll shaft attaching / detaching means for detachably supporting a plate discharging roll shaft. By holding the loading / unloading cassette at the master attaching / detaching position via the holding means, the plate feeding roll axis moving means is driven by the plate feeding roll axis moving driving means, so that the plate feeding roll axis attaching / detaching means and the plate feeding roll The plate feeding roll shaft is automatically attached to and detached from the shaft supporting means. When the plate discharging roll axis moving means is driven by the plate discharging roll axis moving driving means, the plate discharging roll axis is automatically attached to and detached from the plate discharging roll axis attaching / detaching means and the plate discharging roll axis supporting means. That is, by using the master detachable cassette, the setting of the master in the stencil type stencil printing machine and the removal and disposal of the used master are performed by the plate feeding roll axis moving means, the plate feeding roll axis moving driving means, and the plate discharging roll axis. This is automatically performed via the moving means and the plate discharging roll axis moving driving means.

According to the second aspect of the present invention, the master discharge roll shaft is detachable from the plate feeding roll shaft attaching / detaching means, and the plate feeding roll shaft is detachable from the plate feeding roll shaft attaching / detaching means. By using the cassette, the setting of the master in the stencil type stencil printing apparatus and the removal and disposal of the used master are performed via the roll axis moving means and the roll axis moving driving means, each of which is constituted by one. It is done automatically.

According to the third aspect of the present invention, the holding means,
Plate feeding roll axis moving means, plate discharging roll axis moving means, plate feeding roll axis moving driving means and plate discharging roll axis moving driving means,
By arranging on the side of the printing drum in the longitudinal direction of the rotation center axis, a space is formed above the printing drum in the longitudinal direction of the rotation center axis.

According to the invention described in claim 4, the holding means,
By disposing the roll axis moving means and the roll axis moving drive means on the side of the printing drum in the longitudinal direction of the rotation center axis, a space is formed above the printing drum in the longitudinal direction of the rotation center axis.

According to the fifth aspect of the present invention, when the plate feeding roll shaft is in the master detachable cassette, the plate feeding roll shaft is supported by the plate feeding roll shaft fixing portion without rotating, and the plate feeding roll shaft is supported. The plate feed roll shaft guide groove, which is smaller than the outer diameter of the roll shaft, supports the plate feed roll shaft without falling off the groove. On the other hand, when the plate feeding roll shaft is removed from the master detachable cassette, the plate feeding roll shaft is removed via the plate feeding roll shaft guide groove. Similarly, when the plate discharging roll shaft is in the master detachable cassette, the plate discharging roll shaft fixing portion supports the plate discharging roll shaft without rotating, and the plate discharging roll shaft guide groove smaller than the outer diameter of the plate discharging roll shaft. Thereby, the plate discharge roll shaft is supported without falling off from the groove. On the other hand, when the plate discharging roll shaft is withdrawn from the master detachable cassette, the plate discharging roll shaft is
It is removed through the plate discharge roll shaft guide groove.

According to the sixth aspect of the present invention, the rotation transmitting member for transmitting the rotational driving force to the plate discharging roll shaft is detachably provided at one end of the plate discharging roll shaft. It is attached to and detached from one end.

According to the seventh aspect of the present invention, the plate supplying roll shaft, the plate discharging roll shaft, and the master attaching / detaching cassette are all made of a combustible material. Cassettes can be incinerated.

According to the eighth aspect of the present invention, the plate feeding roll shaft attaching / detaching means and the plate discharging roll axis attaching / detaching means are made of a material having higher strength than the main body of the master attaching / detaching cassette, and
By being detachably connected to the main body, the plate feeding roll shaft attaching / detaching means and the plate discharging roll axis attaching / detaching means to be reused when discarded are separated from the main body of the master attaching / detaching cassette to be discarded as dust. Can be separated.

According to the ninth aspect of the present invention, the main body of the master mounting / dismounting cassette is provided with the opening / closing cover which can be opened and closed in a state in which the plate feeding roll and the plate discharging roll are housed, so that the master mounting / dismounting cassette is provided. When the cassette is used, the master detachable cassette is set on the holding means with the open / close cover opened, and after using the master detachable cassette, the open / close cover of the master detachable cassette is closed.

According to the tenth aspect of the present invention, when the used plate discharging roll axis and the used plate feeding roll axis are reset to the main body of the master attaching / detaching cassette after the use of the master attaching / detaching cassette, the automatic closing means is provided. Thereby, the opening / closing cover is automatically closed.

[0031]

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

Embodiment 1 Referring to FIGS. 1 to 14,
A first embodiment according to the first, fifth and sixth aspects of the present invention will be described in detail. FIG. 1 is a configuration diagram of main parts of a stencil type stencil printing machine showing the first embodiment. First, the main part configuration will be described. In FIG. 1, reference numeral 700 denotes a stencil printing machine. Reference numeral 701 denotes a frame provided at a predetermined position of the stencil printing machine 700. This stencil type stencil printing machine 700 includes a frame 70
A printing drum 5 supported by the printing drum 1 and having a stencil master 1 wound on the outer peripheral surface thereof and rotating around a rotation center axis 6;
An ink supply means 60 for supplying ink to the inner peripheral surface of the printing drum 5; and a plate feeding roll of the plate feeding roll 2 in which one end of the master 1 is wound around the plate feeding roll shaft 2s and supplies the master 1 to the printing drum 5. A plate supply roll shaft supporting means 175 for detachably supporting the shaft 2s; and a plate discharge roll shaft of a plate discharge roll 10 in which the other end of the master 1 is wound around the plate discharge roll shaft 9 and the used master 1b is wound from the printing drum 5. And a plate discharge roll shaft supporting means 185 for detachably supporting the printing drum 9 and a plate feeding roll shaft supporting means 175 and a plate discharging roll shaft supporting means 185 which are rotatable with respect to the printing drum 5 around the rotation center axis 6. A plate feeding / discharging unit 190 and a thermal printer serving as a stencil making means for making the master 1 stencil supported on the main body side of the stencil type stencil printing apparatus 700 (hereinafter simply referred to as "printing apparatus main body side"). Plate 4, a platen roller 3 disposed in the vicinity of the plate-supply roll shaft support means 175 and transporting the master 1 in the master transport direction while pressing the master 1 against the thermal head 4 during plate making, and a plate-supply roll shaft 2s detachably supported. A master attaching / detaching cassette 120 (hereinafter simply referred to as “cassette 1”) having a plate feeding roll shaft attaching / detaching unit 121 and a plate ejecting roll shaft attaching / detaching unit 126 for detachably supporting the plate ejecting roll shaft 9.
20) is detachably held at a master attaching / detaching position, a pair of left and right cassette guides 65a and 65b as holding means provided on the printing apparatus main body side, a plate feeding roll shaft attaching / detaching means 121, and a plate feeding roll shaft. A pair of detachable arms 66a and 66b for plate feeding rolls serving as plate feeding roll axis moving means for attaching and detaching the plate feeding roll shaft 2s to and from the support means 175.
(Hereinafter, sometimes referred to as a “detachable arm pair 66 a, 66 b”), and a pair of plate discharging roll shaft moving units for mounting and dismounting the plate discharging roll shaft 9 with respect to the plate discharging roll shaft mounting unit 126 and the plate discharging roll shaft supporting unit 185. The detachable arms 70a, 70b for plate discharging rolls (hereinafter referred to as “detachable arm pair 70a, 7
0b "), the detachable arm pair 66a, 6
A motor 69 (hereinafter simply referred to as “motor 69”) for driving the plate feed roll shaft as a plate feed roll shaft moving drive unit that drives the plate feeding roll 6b, and a plate discharge roll shaft moving drive unit that drives the pair of detachable arms 70a and 70b. And a motor 73 (hereinafter simply referred to as “motor 73”) for driving the movement of the plate discharging roll axis.

The plate supply / discharge unit 190 includes plate supply roll shaft support means 175, plate supply roll 2, platen roller 3, balancer weights 90a and 90b described later, plate discharge roll shaft support means 185, plate discharge roll 10, and plate supply / discharge arm described later. It mainly includes a pair 91a, 91b, a plate discharging roll gear 51 and a plate feeding / discharging friction clutch 92, which will be described later.

The printing drum 5 and a drum shaft 9 which will be described later
3a and 93b, the plate supply / discharge unit 190, the ink supply means 60, and the like constitute a drum unit 220. The drum unit 220 is mounted on the frame 701 from the printing apparatus main body side.
Through a detachable mechanism (not shown) (see FIG. 4).

Hereinafter, the configuration around the printing drum 5, the ink supply means 60, each component of the plate supply / discharge unit 190, the configuration around the thermal head 4, the configuration around the cassette 120 and the cassette guides 65a and 65b, the detachable arm pair 66
a, 66b, detachable arm pair 70a, 70b, motor 69
And the configuration of the motor 73 will be described.

In FIG. 4, a printing drum 5 is provided extending in the direction of the rotation center axis 6, and is made of a resin or metal supporting cylinder having a large number of fine holes 5h having ink permeability. It has a two-layer structure of a body 5a and a plurality of mesh screens 5b wound around the outer peripheral surface. The printable area Pa in which the opening 5h is formed in the supporting cylinder 5a over a range of approximately two-thirds of its circumference.
And an ink impermeable non-printing area H in which the opening 5h is not formed. The printable area Pa of the print drum 5 has an opening 5h formed in a range corresponding to a convex portion of the impression cylinder 115 described later and a narrower range than the width of the master 1, and the other portions are not opened. Department.
The non-printing area H of the printing drum 5 is also provided on both side edges as shown in FIG. The thickness of the mesh screen 5b is about 0.1 mm, which is exaggerated in FIG. Note that FIGS. 1, 2, 5, and 7
8 and FIG. 8, illustration of the mesh screen 5b is omitted for simplification of the drawing.

In FIG. 4, both end portions of the support cylindrical body 5a and the mesh screen 5b are disc-shaped drum flange portions 12a, 12 provided so as to sandwich the both end portions.
b. Drum shafts 93a, 93b are provided at the central bases of the drum flange portions 12a, 12b.
Are integrally formed, and the printing drum 5 is
It is rotatably supported by the rotation center shaft 6 via a bearing 14.

On both drum shafts 93a and 93b, a pair of plate supply / discharge arms 91a and 91b (hereinafter sometimes referred to as "plate supply / discharge arm pair 91a and 91b") sandwiching the printing drum 5 is provided with a bearing (not shown). It is supported rotatably with respect to the rotation center shaft 6 through the shaft. Each plate supply / discharge arm 91a, 9
The base of 1b is connected to drum shafts 93a and 93b via a friction clutch 92 for plate feeding and discharging. As will be described later, the plate feeding / discharging friction clutch 92 connects the plate feeding / discharging arms 91a, 91b and the drum shafts 93a, 93b to rotate integrally during printing, while the plate feeding / discharging arm is used during plate making and plate discharging. The connection is set so as to disconnect the connection between the drum shafts 91a and 91b and the drum shafts 93a and 93b. The plate feeding / discharging friction clutch 92 is manually disengaged for manual operation in the event of a jam.

As shown in FIG. 4 only, the drum gear 17 is formed integrally with one end of the drum shaft 93b. Outside the drum gear 17, a drive motor M18 fixed to a main body side plate (not shown) of the printing apparatus main body and connected to one end of a drum drive shaft 18 is provided. Drum drive shaft 18
A drive gear 19 having a tooth portion that meshes with the drum gear 17 when the drum unit 220 is mounted is fixed to the other end of the drive gear 19. As described above, the drum driving unit 230 includes the driving motor M18, the drum driving shaft 18, and the driving gear 19. The printing drum 5 includes a drum driving unit 230
As a result, it is driven to rotate in the direction of arrow B shown in FIG.

As shown only in FIGS. 1 and 2, a base position shown in FIGS. 1 and 2 (hereinafter referred to as a "fixed position" or a "plate feeding position") is provided on the base side of each of the plate feeding / discharging arms 91a and 91b. The balancer weights 90a and 90b made of a material of relative importance are fixedly mounted at symmetric positions via the rotation center axis 6 with respect to the respective plate supply / discharge arms 91a and 91b in the (sometimes) state. ing. The balancer weights 90a and 90b are arranged so as not to interfere with other parts when the respective plate supply / discharge arms 91a and 91b rotate. Balancer weight 9
Numerals 0a and 90b have a substantially fan shape in a side view, and the size and weight are set so as to balance the rotational moment component of the plate supply / discharge unit 190 with respect to the rotation center shaft 6. As will be described later, in the printing process, the printing drum 5 and the plate supply / discharge unit 190 rotate at a high speed integrally. At this time, as described above, the balance weight 9
Since the integrated objects 0a and 90b are provided, as a whole of these integrated objects, the rotational balance is improved and the load fluctuation during rotation is reduced, so that more stable high-speed printing can be performed. Further, in this embodiment, the home position (plate feeding position) refers to a state in which the portion of the plate feeding roll shaft support means 175 occupies a position almost directly above the vertical plane on the rotation center axis 6.

A connecting member (not shown) for connecting the arms and maintaining rigidity is bridged between the free ends of the plate feeding / discharging arms 91a and 91b so as not to interfere with other parts.

As shown in FIG. 1 only, the ink supply means 6
Reference numeral 0 denotes an ink roller 20 which is provided inside the printing drum 5 and supplies ink to the inner peripheral surface of the printing drum 5, that is, the inner peripheral surface of the support cylinder 5a, and is parallel to the ink roller 20 with a small gap. A doctor roller 22 which is arranged and forms an ink reservoir 21 with the ink roller 20, serves also as a rotation center shaft 6 of the printing drum 5, and serves as an ink reservoir 2.
1 mainly comprises an ink supply pipe 6 for supplying ink to the ink supply pipe 1.

The ink roller 20 has a shaft portion rotatably supported by a side plate (not shown) fixed to the rotation center shaft 6, and rotates the print drum 5 by drive transmission means such as a gear and a belt (not shown). The print drum 5 is rotated in the same direction as the print drum 5 in synchronization. Ink roller 2
An elastic body made of oil-resistant nitrile rubber, fluororubber, resin, or the like is formed on the surface of No. 0 to reduce an impact sound when a pressing unit described later contacts.

The ink is supplied to the ink reservoir 21 through a plurality of supply holes (not shown) formed in the ink supply pipe 6. The supply of the ink to the ink supply pipe 6 is as follows.
This is achieved by suction from an ink pack or the like constituting an ink supply device disposed outside the printing drum 5 via an ink pump (not shown).

Printing drum 5 facing ink roller 20
A pressure drum 115 as a pressing means is provided below the outer peripheral surface of the rotator so as to be rotatable around an eccentric shaft 117 in the direction of arrow A in the figure. The eccentric shaft 117 is supported by a main body side plate (not shown) on the printing apparatus main body side, and is connected to an impression cylinder driving device provided on the printing apparatus main body side. The impression cylinder 115 selectively occupies a printing position where the printing drum 5 is pressed against the printing drum 5 via the printing paper P during printing, and a non-printing position separated from the outer peripheral surface of the printing drum 5 during non-printing. Impression cylinder 1
The outer peripheral surface of the printing drum 15 is pressed against the master 1 wound around the outer peripheral surface of the printing drum 5 via the printing paper P.
Plate supply / discharge unit 1 protruding in the centrifugal direction from the outer circumference of the plate
Notch 118 for avoiding interference with the projecting portion 90
Are formed. The impression cylinder 115 is provided with the plate supply / discharge unit 19.
0 and the notch recess 118, the operation timing is set mutually with a sheet feeding device and a plate supply / discharge unit 190, which will be described later, that is, the peripheral speed is substantially the same as that of the printing drum 5 in synchronization with each other. It is designed to be driven to rotate. A part of the notch recess 118 of the impression cylinder 115 is provided with a squeeze claw 116 that can be opened and closed to hold the leading end of the printing paper P in parallel with the impression cylinder axis. Mulberry claw 11
6 is opened and closed at a predetermined position by opening / closing means which has a cam or the like (not shown) and forcibly opens / closes the claw 116. The impression cylinder 115 is similar to, for example, a press cylinder described in Japanese Patent Application Laid-Open No. 5-201115 or the impression cylinder 4 described in Japanese Utility Model Publication No. 55-23867. Is omitted.

In the vicinity of the left side of the impression cylinder 115 in the figure, a printing sheet P separated and fed from the upstream side by a sheet conveyance unit (not shown) from a sheet feeding unit (not shown) is placed between the printing drum 5 and the impression cylinder 115. And a pair of upper and lower registration rollers 24a and 24b which convey at predetermined timing. The registration roller pairs 24a and 24b are rotatably supported by a main body side plate (not shown) of the printing apparatus main body. Printing drum 5 and registration roller pair 24a, 24
b, a pair of registration rollers 2 is provided above the paper conveyance path.
A paper detection sensor 110 for detecting the feeding of the printing paper P from 4a and 24b is provided.

In the vicinity of the right side of the impression cylinder 115 in the drawing, a paper ejection claw 114 for peeling the printed printing paper P close to the impression cylinder 115, and a conveying roller front 111 rotatably supported by the main body side plate. Further, a transport belt 113 stretched between the transport belt 112 and the transport roller rear 112, and a suction transport device including a suction fan (not shown) are provided. The transport belt 113 is set to be driven at a transport speed higher than the peripheral speed of the printing drum 5 by a driving unit (not shown).

In FIG. 1, FIG. 2, FIG. 3, FIG. 5, FIG. 7, FIG. 8 and the like, the master 1 is made of only a very thin 3 μm thick substantially thermoplastic resin film. Is wound in a continuous sheet shape around the plate feeding roll shaft 2s.
An antistatic agent is applied to the contact surface of the master 1 with the thermal head 4. The thermoplastic resin film is made of, for example, polyester. Here, the master substantially consisting of only the thermoplastic resin film, other than the master is composed only of the thermoplastic resin film, the master resin contains a trace component such as an antistatic agent,
Further, it includes a thermoplastic resin film in which one or more thin film layers such as an overcoat layer are formed on both main surfaces, that is, at least one of the front surface and the back surface.

The plate-supply roll shaft support means 175 includes a detachable groove 175h, a leaf spring 176 and a brake unit 26, which will be described later.

In FIG. 1, FIG. 2, FIG. 3, FIG. 5, FIG. 7, FIG. 8 and FIG. 9, a round bar-shaped plate feeding roll is provided substantially at the center of the free end of the plate feeding / discharging arm pair 91a, 91b. U-shaped attaching / detaching grooves 175h for attaching / detaching the shaft 2s are formed respectively. 3 and FIG.
As shown only in the figure, brake units 26 for applying a predetermined braking force are provided at both ends of the plate feeding roll shaft 2s. Supply / discharge arm pair 9 in detachable groove 175h
As shown in FIG. 9 only, a leaf spring 176 is provided on the inner walls of 1a and 91b. The leaf spring 176 has a substantially U-shaped cross section, and has a central base fixed to the inner wall. The leaf spring 176 is formed around the central base, and supports a rotation support portion 176a rotatably supporting the plate feeding roll shaft 2s, and an inside of a detachable groove 175h formed at an opening of the rotation support portion 176a. An elastic constriction 176b protruding in a mountain shape. Both ends of the leaf spring 176
It fits into the escape hole 175m formed in the inner wall, and relieves the elastic deformation caused by the passage of the plate feeding roll shaft 2s through the elastic constriction 176b. That is, the plate feeding roll 2 is configured such that both ends of the plate feeding roll shaft 2 s
5h, it is rotatably and detachably supported by a leaf spring 176, and the plate supply / discharge arm pair 91a, 91
It is supported so that it does not come off from the attachment / detachment groove 175h due to its inertia when the b rotates. Plate feeding roll shaft support means 17
5, the leaf spring 176 is set so that the detaching force of the plate feeding roll shaft 2s falls within a predetermined range so as to satisfy the above support conditions.
The spring parameters such as the spring constant are set. Therefore, the brake unit 2 is provided to the plate feeding roll shaft support means 175.
Plate supply roll shaft 2s of plate supply roll 2 supported via 6
A predetermined braking force is always applied to both ends of the master 1, and a constant tension is always applied to the master 1 pulled out from the plate feeding roll 2. The unused plate supply roll 2U or the plate supply roll 2 has an outer diameter dimension significantly smaller than that of the conventional one. In FIG. 9, illustration of the thickness of the leaf spring 176 is omitted.

The plate supply / discharge arm pair 91a, 91b on the left side in the drawing near the plate supply roll shaft support means 175 includes:
A platen roller 3 that winds and conveys the master 1 supplied from the plate supply roll 2 around a part of its own peripheral surface is attached by a shaft 3s rotatably supported by a pair of plate supply / discharge arms 91a and 91b. The platen roller 3 has a gap between the outer peripheral surface of the printing drum 5 and the plate feeding / discharging arm pair 91a,
91b. The platen roller 3 is JIS
It is made of an antistatic material made of synthetic rubber having a hardness of A40 °, and is provided so as to extend in the axial direction parallel to the rotation center axis 6.

As shown in FIG. 7 only, reference numeral 210 indicates platen roller driving means. Platen roller driving means 2
Reference numeral 10 denotes a DC motor (not shown) and a plate cam 3 which will be described later.
2, cam follower bracket 33, tension coil spring 3
4, mainly composed of a pulse motor 28 and a drive gear 31.

In FIG. 7, a gear 30 is fixed to one end of a shaft 3s of the platen roller 3 on the side of the plate supply / discharge arm 91a. The main body side plate has a rotary drive shaft 32s.
Is provided, and a plate cam 32 is attached to the rotary drive shaft 32s. In the vicinity of the cam 32 on the printing apparatus main body side,
A cam follower bracket 33 with a roller 33a that rolls in contact with the contour peripheral surface of the cam 32 is provided. The cam follower bracket 33 has a shape in which an arm protrudes from a triangular plate, and one end of the triangular portion forms a mounting portion for the roller 33a, and its base end pivots on the main body side plate with a shaft 33s. Is being worn. Further, the protruding arm-shaped free end of the cam follower bracket 33 is given a rotating behavior in the counterclockwise direction in the figure by a tension coil spring 34 locked to the main body side plate. Further, a pulse motor 28 having a driving gear 31 meshed with a gear 30 fixedly mounted on the rotary drive shaft 31s at a predetermined time described later is attached to one end of the protruding arm of the cam follower bracket 33.

The plate supply / discharge arm pair 91a, 91b is in the home position (plate supply position) shown in FIGS.
As shown in FIG. 6, the positioning is stopped by the plate supply / discharge arm stopping means 35. The plate supply / discharge arm stopping means 35 is a plunger projecting solenoid 37 having a guide pin 36 provided on a side plate 39 on the printing apparatus main body side and capable of projecting in a direction parallel to the rotation center axis 6 (shown in FIG. 1). And a locking hole 38 provided near the free end of the plate supply / discharge arm 91a so that the guide pin 36 can protrude and fit therewith.
It is mainly composed of

As shown in FIG. 5 only, reference numeral 50 designates the thermal head 4 and the master 1 on the platen roller 3 during plate making.
A plate making position (shown by an imaginary line in the figure) to be contacted via
The thermal head contact / separation means for selectively displacing a non-plate making position (indicated by a solid line in the figure) to be separated from the plate making position during plate making is shown. The thermal head contact / separation means 50 mainly includes a DC motor (not shown), a cam 47, a cam follower arm 48, and a spring 49, which will be described later.

On the main body side plate, a D (not shown) connected to a drive shaft 47s on which a plate cam 47 is integrally mounted.
The C motor is fixed. In the vicinity of the cam 47, a pivot 48s is attached to the main body side plate by a shaft 48s.
A cam follower arm 48 with a roller 48a that rolls in contact with the outer peripheral surface of the contour 7 is provided. A mounting portion for a roller 48a is formed on the base end side of the cam follower arm 48, and a thermal head 4 extending in a direction parallel to the axis 3s of the platen roller 3 is mounted on a free end thereof. I have. Further, between the mounting portion of the roller 48a of the cam follower arm 48 and the shaft 48s, the other end of the tension coil spring 49 whose one end is locked to the main body side plate is locked. The tensile head spring 49 gives the thermal head 4 a clockwise turning behavior in the figure. The thermal head 4 has a well-known configuration in which a number of fine resistance heating elements are arranged in a row in a direction orthogonal to the sub-scanning conveyance direction of the master 1, that is, in the main scanning direction.

The plate discharging roll shaft supporting means 185 is constituted by a detachable groove 185h and a leaf spring 186, which will be described later.

As shown in FIG. 1, FIG. 2, FIG. 3, FIG. 5, FIG. 8, FIG. 9 and FIG. 12 to FIG. 14, the plate discharging roll shaft 9 is formed in a round bar shape. The other end of the master 1 fed from the plate feed roll 2 is bonded in advance.
The plate discharge roll 10 is used by the plate discharge roll shaft 9 for the used master 1b.
Is wound up in a roll circle. At one end of the plate discharging roll shaft 9, as shown in FIG. On the other hand, a plate discharging roll gear 51 having a fitting hole 51a as a rotation transmitting member for transmitting a rotational driving force for winding up the used master 1b is provided in the cutting and killing portion 9a. It is designed to be detachably attached via a.

U-shaped attachment / detachment grooves 185h for attaching / detaching the ejection roller shaft 9 are formed near the right side of the attachment / detachment groove 175h at the free ends of the plate supply / discharge arm pairs 91a and 91b. Supply / discharge arm pair 91 in removable groove 185h
As shown in FIG. 9 only, a leaf spring 186 is provided on the inner walls of a and 91b. The leaf spring 186 has a substantially U-shaped cross section, and has a central base fixed to the inner wall. The leaf spring 186 includes a rotation support portion 186a formed around the central base portion for rotatably supporting the plate discharging roll shaft 9 while applying a predetermined braking force, and a rotation support portion 186.
and an elastic constricted portion 186b formed in the opening of FIG. The two distal ends of the leaf spring 186 are connected to the escape holes 18 formed in the inner wall.
It fits within 5 m so as to release the elastic deformation caused by the passage of the plate discharge roll shaft 9 through the elastic constriction 186b. Since the weight of the discharge master roll 10 gradually increases by winding up the used master 1b to which the ink has adhered, the detachment force of the discharge master roll shaft 9 in the master discharge roll shaft support unit 185 is reduced by the plate supply roll shaft support unit. The spring parameters such as the spring constant of the leaf spring 186 are set so as to be in a range larger than the attaching / detaching force of the plate feeding roll shaft 2s at 175. Therefore, since a predetermined braking force is always applied to both ends of the plate discharging roll shaft 9 set in the plate discharging roll shaft supporting means 185, the plate discharging roll gear 51 is provided with a gear 61 of the plate discharging roll driving means 55 (described later). Immediately after the setting before meshing, the used master 1b wound on the plate discharging roll 10 is always given a constant tension, and the used master 1b routed there is loosened and loosened. Not to be.

In FIG. 8, reference numeral 55 denotes a plate discharging roll 1
2 shows a plate discharging roll driving unit that rotationally drives the plate discharging roll shaft 9. The plate discharge roll driving means 55 mainly includes a plate discharge winding motor 56, a drive gear 58, a connecting arm 59, and a gear 61, which will be described later.

A plate discharge take-up motor 56 is fixed to the main body side plate. Rotary output shaft 57 of plate discharge winding motor 56
Is provided with a drive gear 58. Next to the drive gear 58, a shaft 6 held at a predetermined distance by a connecting arm 59 is provided.
1s and rotatably supported around the drive gear 58.
A gear 61 is provided which constantly meshes with the gear 61. A one-way clutch (not shown) incorporated in a bearing portion of the gear 61
It is rotatable only in the direction of arrow A in the figure.

The swinging operation of the connecting arm 59 for meshing or releasing the meshing between the plate discharging roll gear 51 and the gear 61 at a predetermined operation time described later is performed by the rotation output shaft 57,
The positional relationship between the shaft 61 s and the plate discharging roll shaft 9 is such that the half line connecting the rotation output shaft 57 and the shaft 61 s and the half line connecting the plate discharging roll shaft 9 and the shaft 61 s are substantially perpendicular or an obtuse angle larger than that. With such a configuration, the rotation can be performed only by rotating the drive gear 58 by the rotation of the plate discharge winding motor 56. That is, at the start of plate making described later, the drive gear 58 of the plate discharge winding motor 56
Is rotated in the direction of arrow B in the figure, the gear 61 swings in the direction approaching the plate discharging roll gear 51 via the connecting arm 59 under the action of the rotational moment of the gear and meshes with the plate discharging roll gear 51. Then, the rotational force of the plate discharge winding motor 56 is transmitted to the plate discharge roll shaft 9. On the other hand, at the end of plate making, the drive gear 58 of the plate discharge winding motor 56 is slightly reversely rotated in the direction opposite to the direction of arrow B in the figure, so that the gear 61 is stopped via the connecting arm 59 in a stopped state. It swings in the direction away from the roll gear 51 and disengages with the plate discharging roll gear 51.

In FIG. 12 and FIG.
Indicates a cassette frame. Cassette frame 120f
Has a substantially housing shape, and an opening 120g for attaching and detaching the master 1 and the used master 1b is formed in a lower wall thereof. Cassette frame 12 in FIG.
0f, the cassette guides 65a, 6
Guide grooves 120a and 120b are formed to guide the cassette 120 to the master attachment / detachment position by fitting 5b. Cassette frame 120f in FIG.
On the left side of the front and rear side walls, a plate feed roll shaft guide groove 122 (hereinafter simply referred to as a “guide groove 122”) that constitutes a plate feed roll shaft attaching / detaching means 121 that detachably supports the plate feed roll shaft 2s.
) And a spring guide 124. On the right side of the front and rear side walls of the cassette frame 120f in FIG. 12, a discharge roll axis guide groove 127 (hereinafter simply referred to as a "guide groove 127") constituting a discharge roll axis attaching / detaching means 126 for detachably supporting the discharge roll axis 9 is provided. ) And a spring guide 129. The groove width of the guide groove 122 is smaller than the outer diameter of the plate feeding roll shaft 2s, and the groove width of the guide groove 127 is smaller than the outer diameter of the plate discharge roll shaft 9. Spring guide 124
A relief groove 123 for releasing a bent portion of the spring guide portion 124 when the plate feed roll shaft 2s passes through the guide groove 122 is formed on the outer side of the groove. Similarly, the spring guide 1
An escape groove 128 is formed outside of the groove 29 to allow the bent portion of the spring guide portion 129 to escape when the plate discharging roll shaft 9 passes through the guide groove 127.

At the toe of the guide groove 122, the plate feed roll shaft 2
A plate-supply roll shaft fixing portion 125 (hereinafter, simply referred to as “shaft fixing portion 125”) that supports s in a predetermined torque range so as to be non-rotatable is provided at the toe end of the guide groove 127 at the toe end of the guide groove 127.
The plate discharging roll shaft fixing portions 130 (hereinafter, simply referred to as “shaft fixing portions 130”) for supporting the rotation of the roller in a predetermined torque range are formed. Note that supporting the plate feeding roll shaft 2s or the plate discharging roll shaft 9 so as not to rotate within a predetermined torque range means that the cassette 120 is carried and a normal handling state such as setting of the cassette 120 to each of the cassette guides 65a and 65b. The plate discharging roll shaft 2s of the unused plate supplying roll 2U is wound on the shaft fixing portion 125, and the plate discharging roll shaft of the plate discharging roll 10 (shown by a phantom line in the figure) which is fully filled by completely winding up the used master 1b. 9
Refers to a state in which the shaft fixing portion 130 is restrained without rotating within a predetermined torque range that does not rotate.
This does not mean that the cassette frame 120f, the plate feeding roll shaft 2s, or the plate discharging roll shaft 9 is so strongly restrained as to be worn. The predetermined torque range in the shaft fixing portion 125 is smaller than the torque applied by the plate discharge winding motor 56 to feed the master 1 from the unused plate supply roll 2U or the plate supply roll 2 at the time of initial setting of the master described later. It is set weakly. Plate feeding roll shaft attaching / detaching means 121
Each of the above-mentioned components is the weight of the unused plate feeding roll 2U, and each of the components of the plate discharging roll shaft attaching / detaching means 126 does not fall off at least by its own weight of the plate discharging roll 10 which is full with the used master 1b. The shape and dimensions are set so as to satisfy the conditions for detachable support.

In each of the following embodiments and modifications, the spring guide 124 and the relief groove 123 constituting the plate feed roll shaft attaching / detaching means 121 and the plate discharging roll shaft attaching / detaching means 12 are described.
The illustration of the detailed components such as the spring guide portion 129 and the relief groove 128 constituting the sixth embodiment 6 is shown only in FIG.
For simplification of the drawing, the description will be omitted as needed, and the corresponding parts will be denoted by the same reference numerals and replaced with the drawing. Further, it goes without saying that the above-described spring guide portions and the respective relief grooves have the above-described functions even if they are additionally formed on both sides of the guide groove 122 or the guide groove 127.

The cassette frame 120f is formed integrally with a synthetic resin of polyphenylene sulfide (PPS). Similarly, the plate feeding roll shaft 2s and the plate discharging roll shaft 9 are also made of a synthetic resin of polyphenylene sulfide (PPS). One end of the master 1 is attached to the plate feeding roll shaft 2s with an adhesive strength such that the master 1 is easily detached from the plate feeding roll shaft 2s when the entire amount of the used master 1b is wound up on the plate discharging roll shaft 9 of the plate discharging roll 10. It is stuck.

The material of the cassette frame 120f is not limited to those described above, and may be, for example, polybutylene terephthalate (PBT), acrylonitrile butadiene styrene (ABS), acrylonitrile styrene (AS),
Resins such as polypropylene (PP) and polyethylene (PE) may be used.

When the plate discharging roll 10 is full of the used master 1b, the cassette 120 is discarded together with the plate feeding roll shaft 2s in which the master 1 is no longer consumed and the plate discharging roll 10 filled with the used master 1b. It is set as a so-called disposable specification.

Each cassette guide 65a, 65b is shown in FIG.
As shown in FIG. 3, four positions are provided at the above-mentioned master attaching / detaching positions above the drum flange portions 12a and 12b of the printing drum 5. Each of the cassette guides 65a and 65b has a stepped rectangular shape and is made of stainless steel. The cassette guides 65a and 65b are resiliently engaged with and held by guide grooves 120a and 120b for positioning the cassette frame 120f with respect to the printing drum 5 in the longitudinal direction in the drawing, that is, the width direction of the master 1. A stopper (not shown) is provided. Each of the cassette guides 65a and 65b is not limited to a metal such as stainless steel, but may be any of the aforementioned (PBT, ABS, AS, PP, P
It may be formed of a synthetic resin such as E).

As shown in FIGS. 1 to 3, the base ends of the detachable arms 66a and 66b extend in parallel with the platen roller shaft 3s above and outside the drum flanges 12a and 12b of the printing drum 5. Output shaft 6 of motor 69
9s. Each detachable arm 66
a, 66b, each cassette guide 65a,
The plate feeding roll shaft 2s is detached from the plate feeding roll shaft attaching / detaching means 121 by engaging and grasping both ends of the plate feeding roll shaft 2s of the cassette 120 held at the master attaching / detaching position by 65b, and the plate supplying roll shaft supporting. A supply / detachment roll shaft attaching / detaching groove 67 (hereinafter, simply referred to as an “attach / detach groove 67”) for mounting the plate feeding roll shaft 2s to the means 175, and a plate feeding roll shaft 2s supported by the plate feeding roll shaft support means 175; , And detached from the plate-supply roll shaft supporting means 175, and a plate-supply roll shaft attaching / detaching groove 68 (hereinafter referred to as a groove) for mounting the plate-supply roll shaft 2s to the plate-supply roll shaft attaching / detaching means 121. , Simply referred to as a “removable groove 68”). The groove width at the opening end of the attachment / detachment groove 67 is formed slightly smaller than the outer diameter of the plate supply roll shaft 2s, while the groove width of the attachment / detachment groove 68 is formed slightly larger than the outer diameter of the plate supply roll shaft 2s. I have. As shown in detail in FIG. 10, a spring guide 67a is provided on one side wall of the attaching / detaching groove 67.
Relief grooves 67b are formed on the outside of the spring guide 67a to allow the bent portion of the spring guide 67a to escape when the plate feeding roll shaft 2s is attached and detached. Removable groove 6
7, the attachment / detachment force of the plate feeding roll shaft 2s is determined by the shaft fixing portion 125 and the guide groove 12 in the plate feeding roll shaft attaching / detaching means 121.
2 is smaller than the attaching / detaching force of the plate feeding roll shaft 2s with respect to the plate feeding roll shaft 2s and the attaching / detaching force of the plate feeding roll shaft 2s in the plate feeding roll shaft supporting means 175, and is at least larger than about half of the own weight of the unused plate feeding roll 2U. Is set.

As shown in FIGS. 1 to 3, the base ends of the detachable arms 70a and 70b extend in parallel with the platen roller shaft 3s above and outside the drum flanges 12a and 12b of the printing drum 5. Output shaft 7 of motor 73
3s. Each detachable arm 70
a, 70b, each cassette guide 65a,
65b, the plate discharging roll shaft 9 is detached from the plate discharging roll shaft attaching / detaching means 126 by engaging and grasping both ends of the plate discharging roll shaft 9 of the cassette 120 held at the master attaching / detaching position, and the plate discharging to the plate discharging roll shaft supporting means 185. Roll axis 9
And a discharge roll shaft attaching / detaching groove 71 (hereinafter, simply referred to as a “detachment groove 71”) for mounting a plate discharge roll shaft supporting means 1.
The plate discharge roll shaft 9 supported by the plate 85 is detached from the plate discharge roll shaft supporting means 185, and the plate discharge roll shaft attaching / detaching groove 72 for mounting the plate discharge roll shaft 9 to the plate discharge roll shaft attaching / detaching means 126. (Hereinafter simply referred to as “removable groove 7
2 ”) are formed with their backs facing each other.
The groove width at the opening end of the detachable groove 71 is formed slightly smaller than the outer diameter of the plate discharging roll shaft 9, while the groove width of the removable groove 72 is formed slightly larger than the outer diameter of the plate discharging roll shaft 9. As shown in detail in FIG. 11, a spring guide portion 71a is provided on one side wall of the attachment / detachment groove 71, and a spring guide portion 71a for attaching / detaching the plate discharging roll shaft 9 is provided outside the spring guide portion 71a.
An escape groove 71b is formed to allow the bent and deformed portion to escape. The attaching / detaching force of the plate discharging roll shaft 9 in the attaching / detaching groove 71 is controlled by the shaft fixing portion 13 of the plate discharging roll shaft attaching / detaching means 126.
0 and the detachment force of the plate discharging roll shaft 9 with respect to the guide groove 127 and the detaching force of the plate discharging roll shaft 9 in the plate discharging roll shaft support means 185, respectively, and at least the own weight of the plate discharging roll 10 which is full with the used master 1b. Is set larger than half.

The plate-supply roll shaft supporting means 175 of the plate-supply roll shaft 2 s in the attachment / detachment groove 67 and the plate-supply roll shaft 2 s with respect to the shaft fixing portion 125 and the guide groove 122 in the plate-supply roll shaft attachment / detachment means 121. Of the plate feeding roll shaft 2s, the plate discharging roll shaft 9 in the mounting / dismounting groove 71, the plate fixing roll 130 of the plate discharging roll shaft attaching / detaching means 126 and the plate discharging roll shaft 9 for the guide groove 127, and the plate discharging roll shaft in the plate discharging roll shaft supporting means 185. To be precise, each of the attachment / detachment forces 9 is divided into an insertion force and a removal force and has a predetermined force range. However, for the sake of simplicity, the attachment / detachment force is not divided into the insertion force and the removal force. He mentioned the magnitude relationship simply as the detaching force.

As shown in detail in FIG.
Occupies the master attachment / detachment position and the attachment / detachment groove 190 or the attachment / detachment groove 68 of the attachment / detachment arms 66a, 66b and both ends of the plate supply roll shaft 2s of the plate supply roll 2 when the plate supply / discharge unit 190 occupies a fixed position. Of the plate feed roll shaft attaching / detaching means 121
22 and a detachable groove 175h of the plate feeding roll shaft supporting means 175
And the shape of each groove 122, 175h is determined so as to match this. Similarly, the trajectory in which the detachable groove 71 or the detachable groove 72 of the detachable arms 70a and 70b engages with the both ends of the plate discharge roll shaft 9 of the plate discharge roll 10 rotates and is guided by the guide groove 127 of the plate discharge roll shaft attaching / detaching means 126. And plate discharge roll shaft support means 1
Each of the grooves 127 and 185h is positioned so as to be aligned with the center of each of the 85 detachable grooves 185h.

As shown in FIGS. 1 to 3, the motor 69 and the motor 73 are fixed via the main body side plate near the outside of the free end of the plate supply / discharge arm 91b stopped at the plate supply position. ing. The motor 69 and the motor 73 are
Both of them comprise a motor such as a DC motor or a stepping motor that can be driven to rotate clockwise (direction of arrow A in the figure) and counterclockwise (direction of arrow B in the figure).

Next, the operation will be described with reference to FIGS. 15 to 24, the components around the print drum 5, the plate supply / discharge arm stopping means 35, the plate discharge roll gear 51, the brake unit 2
6, detailed components such as the thermal head contacting / separating means 50, the plate discharging roll driving means 55, the components around the cassette 120, the plate feeding / discharging unit 190, the motor 69 and the motor 73 are illustrated in order to simplify the description. It is omitted or simplified as needed. The impression cylinder 115 is drawn for convenience of illustration so as to be in contact with the outer peripheral surface of the printing drum 5 in FIGS. 15 to 24 referred to below. Separate enough to not touch the surface.

First, the unused plate feeding roll 2U and the plate discharging roll shaft 9 are set by using the cassette 120 in which the plate feeding roll shaft 9 is set as shown by the phantom line in FIGS. An initial master setting in which 2U and an unused plate discharge roll 10U (plate discharge roll shaft 9) are set in the plate supply / discharge unit 190, and the master 1 is wound around the outer peripheral surface of the printing drum 5 for plate supply will be described. First, in FIG. 2 and FIG. 15, the cassette 12
0, the guide grooves 120a and 120b are fitted, and the cassette 120 is inserted into the master attaching / detaching position via the stopper.
Set manually. At this time, the plate supply / discharge arm stop means 35 (shown in FIG. 6) is operating, and the plate supply / discharge unit 1
Numeral 90 is stopped at the home position (plate feeding position or fixed position) shown in FIGS. That is, in FIG. 6, when the solenoid 37 is turned on, the guide pin 36 is inserted into the locking hole 38 of the plate feeding / discharging arm 91a.
Is inserted, and the plate supply / discharge unit 190 is stopped at the plate supply position. When the solenoid 37 is turned off, the stopped state is released. In the following operation, the description of the operation of stopping and releasing the plate supply / discharge unit 190 by the plate supply / discharge arm stopping means 35 will be omitted as needed. Detachable arm pair 66a, 66b and detachable arm pair 70a, 70b
Is waiting at a standby position with its free end substantially upright in FIG.

Next, by pressing a master set key (not shown) provided on an operation panel (not shown) of the printing apparatus main body, all subsequent operations are automatically performed.
First, the motor 73 is driven to rotate counterclockwise,
As shown in FIG. 16, the detachable arm pair 70a, 70b is rotated in the direction of arrow B2 in the figure, and the detachable arm pair 70a, 70b is rotated.
The two mounting grooves 71b engage with both ends of the plate discharging roll shaft 9, and the plate discharging roll shaft 9 is removed from the plate discharging roll shaft attaching / detaching means 126.

Next, as shown in FIG.
Is further rotated counterclockwise,
The detachable arm pair 70a, 70b is further rotated in the direction of arrow B2, the plate discharging roll shaft 9 is mounted on the plate discharging roll shaft support means 185, and the unused plate discharging roll 10U is mounted on the plate feeding / discharging unit 190 (see FIG. 18). .

Next, in FIG. 18, when the motor 73 is driven to rotate in the reverse direction in the clockwise direction, only the detachable arm pair 70a, 70b is reversely rotated in the direction of arrow A2 and returns to the original standby position. And a plate supply / discharge arm stopping means 3
5 is operated to release the stopped state of the plate supply / discharge unit 190, and the friction drum 92 (shown in FIG. 4) for plate supply / discharge is operated, so that the printing drum 5 and the plate supply / discharge unit 190 at the plate supply position. And are connected.

Next, in FIG. 19, the drum driving means 230 operates. That is, when the drive motor M18 (shown in FIG. 4) of the drum drive means 230 is rotationally driven, the print drum 5 and the plate supply / discharge unit 190 rotate integrally in the direction of arrow B in the figure. At the same time, the impression cylinder 115 is rotated in the direction of arrow A in the figure in synchronization with the rotation of the printing drum 5, and the impression cylinder 115 presses the master 1 wound on the outer peripheral surface of the printing drum 5, The outer peripheral surface of the printing drum 5 and the back surface of the unprinted master 1 are subjected to printing for filling with ink. At this time, FIG.
9, the master 1 pulled out from the plate supply roll 2 slightly loosens, but as the print drum 5 and the plate supply / discharge unit 190 rotate integrally in the direction of arrow B in the figure, Plate feeding roll shaft attaching / detaching means 121
A predetermined braking force is applied to the plate feeding roll shaft 2s by the spring guide portion 124 of FIG. As a result, the master 1 pulled out from the plate feeding roll 2 is immediately wound around the outer peripheral surface of the printing drum 5 while being given a predetermined tension. At this time, the thermal head 4 and the notch recess 1 of the impression cylinder 115 supported by the above-described units on the printing apparatus main body side.
18, the drive gear 31 and the gear 61
Since the projection 90 is separated from or escapes from the projection, no trouble such as interference occurs (see FIG. 20).

When the printing drum 5 and the plate supply / discharge unit 190 together make a round around the rotation center shaft 6 and occupy the plate supply position, the plate supply / discharge arm stopping means 35 is operated, and the plate supply / discharge unit 190 is fed. The positioning is stopped at the plate position.

When the plate feeding / discharging unit 190 is stopped at the plate feeding position, in FIG. 21, the motor 69 is driven to rotate clockwise, and the detachable arm pair 66a, 66b is turned on.
Is rotated in the direction of the arrow A1 in the figure, and the detachable arm pair 69a,
The two mounting / removing grooves 67b engage with both ends of the plate feeding roll shaft 2s, and the plate feeding roll shaft attaching / detaching means 121 sends the plate feeding roll shaft 2s.
Is removed.

Next, as shown in FIG.
Is further driven to rotate, so that the detachable arm pair 66
a and 66b are further rotated in the direction of arrow A1, and the plate feeding roll shaft 2s is mounted on the plate feeding roll shaft support means 175. At this time, the master 1 drawn from the plate roll 2
Is fed to the upper outer peripheral surface of the platen roller 3, and the plate feeding roll 2 is mounted on the plate feeding / discharging unit 190.

Next, as shown in FIG.
Is driven in the counterclockwise direction, only the detachable arm pair 66a, 66b is reversely rotated in the direction of arrow B1 and returns to the original standby position.

In FIG. 23, the master 1 from the outer peripheral surface of the print drum 5 at the upper left to the upper outer peripheral surface of the platen roller 3 and the plate supplying roll 2 mounted on the plate supplying roll shaft support means 175 is supplied with a supply. While pulling out the master 1 from the plate roll 2, as shown in FIGS.
Because of this, there is some slack. 21 to 23, however, the illustration of the slight slack of the master 1 is omitted. In order to remove a slight slack of the master 1, first, plate discharging is performed immediately after the initial setting of the master. At this time, the plate supply / discharge arm pair 91a, 9
1b is a state in which the connection to the printing drum 5 is disconnected by the operation of the plate feeding / discharging friction clutch 92, and the printing drum 5 occupies the plate feeding position. As shown in FIG. 8, when the plate discharge roll driving unit 55 operates, the plate discharge roll gear 51 and the gear 61 are engaged with each other by the above-described operation. In this state, the plate discharge take-up motor 56 is driven to rotate, so that the plate discharge roll shaft 9 is rotated in the direction of arrow B, and the unprinted master 1 is wound around the plate discharge roll shaft 9 of the plate discharge roll 10. Will be taken. At the same time as the rotation of the plate discharging take-up motor 56, the printing drum 5 alone is rotated in the direction of arrow B in the drawing by the driving force supplied from the driving motor M18 of the drum driving means 230, so that the slack occurs. The master 1 is sequentially conveyed to the plate discharging roll 10 side. Immediately after the rotation of the plate discharge winding motor 56, the platen roller driving means 210 (shown in FIG. 7) operates.
That is, the cam follower bracket 33 is rotated about the shaft 33 s by rotating the cam 32 in the direction of the arrow B in the drawing by the rotation drive of the DC motor (not shown), and the drive gear 31 meshes with the gear 30. Becomes At this time, the rotation of the pulse motor 28 causes the gear 30 and the platen roller 3 to move in the direction indicated by the arrow B in the figure.
The master 1 is transported while being pulled out from the plate feed roll 2 sequentially. The peripheral speed of the printing drum 5 is set to be slightly higher than the peripheral speed of the platen roller 3 in order to apply an appropriate tension to the master 1 supplied from the platen roller 3 and wind the master 1 around the printing drum 5. Thus, only the printing drum 5 is rotated in the direction of arrow B in the figure at a speed synchronized with the peripheral speed of the platen roller 3, and
When it is determined from the number of steps of the pulse motor 28 that the used master 1b of the slack of the unprinted plate having the slack of about one outer peripheral length of the printing drum 5 has been wound on the plate discharging roll 10, the plate discharging winding motor When the drive of the plate 56 is stopped, the rotation of the plate discharging roll 10 is stopped, and then the gear 61 is separated from the plate discharging roll gear 51 by the above-described operation. At the same time, in FIG. 7, the platen roller driving means 210 operates. First, the rotation of the pulse motor 28 is stopped. Next, the cam 32 is driven by the rotation of the DC motor.
Is further rotated in the direction of arrow B in the drawing to release the engagement between the large diameter portion and the roller 33a, and the biasing force of the tension coil spring 34 causes the cam follower bracket 3 to rotate.
3 is rotated counterclockwise about the axis 33s. As a result, the meshing state between the drive gear 31 and the gear 30 is released, and the drive gear 31 occupies a position where it does not interfere with the protruding portion of the plate supply / discharge unit 190. In this state, the brake unit 26 applies the master 1 arranged on the outer peripheral surface of the printing drum 5 from the plate supplying roll 2 mounted on the plate supplying roll shaft supporting means 175 via the upper outer peripheral surface of the platen roller 3 to the master unit 1 by the brake unit 26. A predetermined tension is applied by a predetermined braking force applied to the plate feeding roll shaft 2s, and plate making described later can be performed without generating wrinkles in a state where tension is given.

Next, in FIGS. 5, 7 and 8, plate making and plate discharging are performed simultaneously. A document (both not shown) is set in a document reading section of the document reading device, and a start signal is transmitted when a plate making start key (not shown) is turned on, whereby image information of the document is read by the document reading device, The drive motor M18 of the drum drive means 230 is driven, and the print drum 5 is stopped near the home position (plate feeding position) shown in FIGS. At this time, the plate feeding / discharging unit 190 is operated by the operation of the plate feeding / discharging arm stopping means 35 (shown in FIG. 6) as shown in FIGS.
Is stopped at the home position (plate feeding position) shown in FIG. The plate feeding / discharging arm pair 91a, 91b is disconnected from the printing drum 5 by the operation of the plate feeding / discharging friction clutch 92 and is in the plate feeding position.

At the same time, the thermal head 4 is displaced to a plate making position where the thermal head 4 comes into contact with the platen roller 3 via the master 1 by the operation of the thermal head contact / separation means 50.
That is, as shown in FIG. 5, the cam 47 is rotated by the rotation of a DC motor (not shown), the engagement between the large diameter portion and the roller 48a is released, and the cam follower arm 48 is biased by the spring 49. Is rotated in the direction of arrow D, and the heating element of the thermal head 4 is pressed against the platen roller 3 via the master 1.

On the other hand, at the same time as the above operation, plate making is performed with the operation of the above-mentioned platen roller driving means 210 as shown in FIG. The roller 3 is rotated in the direction of arrow B in the drawing, and the master 1 is conveyed while being sequentially pulled out from the plate supply roll 2. At the same time, image information read from the document reading device from a position corresponding to the opening end position F of the printing drum 5 is transferred to a CCD (photoelectric conversion element).
The signal is converted to an electric signal by an A / D (analog / digital) converter, a plate making control device, etc. (both not shown), and a pulse is applied to the heating element of the thermal head 4 in accordance with these signals. The heating element of the thermal head 4 is operated in the main scanning direction to selectively generate heat, and the master 1 is sequentially heated and perforated from the tip of the master 1 while being conveyed in the sub-scanning direction, thereby performing plate making.

At the same time as the plate making operation, the drum driving means 2
30, only the printing drum 5 is rotated at a speed synchronized with the peripheral speed of the platen roller 3 in the direction of arrow B in the figure by the driving force supplied from the driving motor M18. Wrapped around. The peripheral speed of the print drum 5 is set to be slightly higher than the peripheral speed of the platen roller 3 in order to apply an appropriate tension to the plate-making master 1a supplied from the platen roller 3 and wind the master 1a around the print drum 5. I have.

As shown in FIG. 8, in parallel with the plate making operation, the plate discharge roll gear 51 and the gear 61 are engaged with each other by the operation of the plate discharge roll driving means 55 as described above. In this state, when the plate discharging take-up motor 56 is driven to rotate, the plate discharging roll shaft 9 of the plate discharging roll 10 is rotated in the direction of arrow B, and the used master 1b is wound around the plate discharging roll 10 in a roll shape. .

During the plate making / discharge operation described above, since a predetermined braking force is applied to the plate feeding roll shaft 2s of the plate feeding roll 2 by the brake unit 26, the plate feeding roll 2 is fed out from the plate feeding roll 2. A predetermined tension is applied to the master 1, and the master 1 can perform perforation and plate making with the thermal head 4 without generating wrinkles, and supply the master 1 with the platen roller 3 to the outer peripheral surface of the printing drum 5.

The position corresponding to the rear end position E (plate making end position) of the opening of the printing drum 5 is determined by the number of steps of the pulse motor 28, and the plate making is completed. When it is determined by the print drum rotation detection sensor (not shown) that the initial position return (one rotation) of the print drum 5 has been completed, the thermal head 4 operates the thermal head contact / separation means 50 as shown in FIG. As a result, the platen roller 3 is separated from the platen roller 3 in the direction of arrow U via the master 1 and occupies the non-plate making position.

At the same time, in FIG. 7, the platen roller driving means 210 operates. By the operation described above,
The meshing state between the drive gear 31 and the gear 30 is released, and the drive gear 31 occupies a position where the drive gear 31 does not interfere with the protruding portion of the plate supply / discharge unit 190.

On the other hand, at the same time as the above operations, the plate discharge roll driving means 55 operates. By the operation described above, the gear 61
Is separated from the plate discharge roll gear 51.

Next, the stop state of the plate supply / discharge unit 190 is released by the operation of the plate supply / discharge arm stopping means 35,
As shown in FIGS. 1 and 23, the plate supply / discharge unit 190 and the printing drum 5 are integrated, ie, the plate supply / discharge arm friction clutch 9 of the plate supply / discharge arm pair 91a, 91b.
2 is rotated while connected to the printing drum 5.

When the printing process is started, the printing paper P loaded on the paper feeding table (not shown) is transferred to the pair of registration rollers 24a and 24b (shown in FIG. 1) by the paper conveying means (not shown).
To the registration roller pair 24a, 24
By b, it is inserted between the claw claws 116 of the impression cylinder 115 at a predetermined timing synchronized with the rotation of the printing drum 5. In this way, the leading end of the printing paper P is conveyed between the outer peripheral surface of the printing drum 5 and the convex outer peripheral surface of the impression cylinder 115 while being clamped by the claw 116. At this time, when the feeding of the printing paper P is detected by the paper detection sensor 110, the eccentric shaft 117 of the impression cylinder 115 rotates counterclockwise, and the impression cylinder 115 is raised to occupy the printing position. The printing paper P is continuously pressed against the plate-making master 1a wound on the outer peripheral surface of the printing drum 5 rotating in the direction of arrow B in FIG. The finished master 1a comes into close contact with the outer peripheral surface of the printing drum 5, and ink is transferred to the surface of the printing paper P from the perforated portion of the plate-making master 1a.

At this time, the ink roller 20 (shown in FIG. 1) also rotates in the same direction as the rotation direction of the printing drum 5,
The ink is supplied to the inner peripheral surface of the printing drum 5. The printing paper P printed in this manner is placed at a predetermined position on the
The sheet is released from the sheet feed roller 16, peeled off by the sheet discharge claw 114, conveyed by the suction conveyance device, and discharged and stacked on a sheet discharge table (not shown). In this way, so-called printing is performed in which the master-made master 1a is filled with ink, and the impression cylinder 115 is separated from the non-printing position and returned to the initial state, and the printing standby state is set.

Next, by inputting the number of prints with a ten-key (not shown) and turning on a print start key (not shown), the above-described steps of printing, paper feeding, and paper discharging are repeated a predetermined number of times to perform printing.

In this manner, the operations of the respective steps of plate making / plate feeding, plate discharging, and printing are repeated, and all the masters 1 of the plate feeding rolls 2 are used up and all of them are used as masters 1b. As shown in FIG. 24, when the plate discharging roll 10 is wound around the shaft 9 and becomes a used plate discharging roll 10 'which is full of the used master 1b, the motor 73 is rotated as shown in FIG.
Is rotated clockwise, and the detachable arm pair 70
a, 70b are rotated in the direction of arrow A2 in the figure, and the detachable grooves 72 of the detachable arm pair 70a, 70b are engaged with both ends of the used plate discharging roll shaft 9 ', and the used plate discharging roll is supported by the plate discharging roll shaft supporting means 185. The used plate discharging roll shaft 9 'of 10' is removed. When the motor 73 is further rotated, the detachable arm pair 70a, 70b is further rotated in the direction of arrow A2, and the used plate discharging roll shaft of the used plate discharging roll 10 'is attached to the plate discharging roll shaft attaching / detaching means 126 of the cassette frame 120f. 9 'is attached. Thereafter, when the motor 73 is driven to rotate counterclockwise, only the detachable arm pair 70a, 70b is reversely rotated in the direction of the arrow B2 and returns to the original standby position.

Similarly to the above operation, in FIG. 24, the motor 69 is rotated counterclockwise to rotate the pair of detachable arms 66a and 66b in the direction of arrow B1 in the figure, and the pair of detachable arms 66a and 66b Both of the attachment / detachment grooves 68 are engaged with both ends of the used plate feeding roll shaft 2s ', and the used plate feeding roll shaft 2s' is removed from the plate feeding roll shaft supporting means 175.
When the motor 69 is further driven to rotate, the detachable arm pairs 66a and 66b are further rotated in the direction of arrow B1, and the used plate supply roll shaft 2s' (shown in the figure) is attached to the plate supply roll shaft attaching / detaching means 121 of the cassette frame 120f. (Indicated by phantom lines). Thereafter, when the motor 69 is driven to rotate clockwise, the detachable arm pair 66 is rotated.
Only a and 66b are rotated in the direction of arrow A1 to return to the original standby position.

In this way, the used plate discharging roll 10 '
Used plate discharge roll shaft 9 'and used plate supply roll shaft 2
The used cassette 120 'having the s' mounted thereon is discarded together. Note that the rotational driving of the motor 69 and the motor 73 in FIG. 24 is not limited to the above operation, and may be performed simultaneously.

(Embodiment 2) FIG. 25 to FIG.
A second embodiment according to the described invention is shown. In FIG. 25, FIG. 27, and FIG. 28, reference numeral 700A indicates a stencil type stencil printing machine according to the second embodiment. This stencil printing machine 700A is:
In the stencil printing machine 700 according to the first embodiment, the plate feeding roll shaft attaching / detaching unit 121A is replaced with the plate feeding roll shaft attaching / detaching unit 121 of the cassette 120, and the plate discharging roll is replaced with the plate discharging roll shaft attaching / detaching unit 126 of the cassette 120. Shaft attaching / detaching means 12
Using cassettes 120A each having 6A,
The detachable arm pair 66a, 66b and the detachable arm pair 70a,
70b is a pair of detachable arms 74a, 74b (hereinafter, referred to as a detachable arm pair 74a, 7
4b "), the motor 69
And a roll axis movement driving motor 77 (hereinafter simply referred to as “motor 77”) as a roll axis movement driving means for driving the detachable arm pair 74a, 74b in place of the motor 73; The main difference lies in having a plate supply / discharge unit 190A.

In FIGS. 25, 27 and 28, reference numeral 120fA indicates a cassette frame. The cassette frame 120fA is provided with a plate feeding roll shaft attaching / detaching unit 121A and a plate discharging roll shaft attaching / detaching unit 126A. The plate feeding roll shaft attaching / detaching unit 121A is provided with the plate discharging roll shaft 9 for the plate feeding roll shaft attaching / detaching unit 121 of the cassette 120, and the plate discharging roll shaft attaching / detaching unit 126A is provided with the plate feeding roll shaft attaching / detaching unit 126 for the cassette 120. The difference is that the roll shaft 2s is detachable. The plate feeding roll shaft attaching / detaching means 121A includes a guide groove 122A and a spring guide portion 124A. Plate discharging roll shaft attaching / detaching means 126A
Consists of a guide groove 127A and a spring guide 129A.
The groove width of the guide groove 122A is smaller than the outer diameter of the plate feeding roll shaft 2s, and the groove width of the guide groove 127A is smaller than the outer diameter of the plate discharge roll shaft 9. Spring guide 12
On the outer side of 4A, a relief groove 123A is formed for releasing a bent portion of the spring guide portion 124A when the plate feed roll shaft 2s and the discharge roll shaft 9 pass through the guide groove 122A. Similarly, a relief groove 128A is formed outside the spring guide portion 129A to allow a bent portion of the spring guide portion 129A to escape when the plate discharge roll shaft 9 and the plate feeding roll shaft 2s pass through the guide groove 127A.

That is, the outer diameters of the plate feeding roll shaft 2s and the plate discharging roll shaft 9 are the same, the guide groove 122A and the guide groove 127A have the same groove width, and the spring guide portion 124A and the spring guide The specifications (the detaching force of the plate feeding roll shaft 2s and the plate discharging roll shaft 9) with the part 129A are the same. The guide groove 122A and the guide groove 127A are formed on the rotation trajectory 78 of the detachable groove 75 and the detachable groove 76 of the detachable arm pair 74a, 74b described later. In addition, the plate fixing roll 125 is a plate discharging roll of the plate discharging roll 10 (indicated by a phantom line in the figure) which is full by winding up the plate supplying roll shaft 2s of the unused plate supplying roll 2U or the used master 1b. The shaft 9 is provided on the shaft fixing unit 130 with only the plate-supply roll shaft 2s or the plate-supply roll 2 or the plate-discharge roll 10 that has completely used up the master 1.
The plate discharge roll shaft 9 or only the plate discharge roll shaft 9 is restrained without rotating within a predetermined torque range that does not rotate. The above-mentioned components of the plate feeding roll shaft attaching / detaching means 121A are the own weight of the plate discharging roll 10 which is completely filled by winding up the unused plate feeding roll 2U or the used master 1b, and the above-mentioned components of the plate discharging roll shaft attaching / detaching means 126A. The components are set to have respective shapes and dimensions so that at least each of the components does not fall off by its own weight of the plate feeding roll 2 or the plate discharging roll 10 and satisfies the condition for detachably supporting the components.

The plate supply / discharge unit 190A is different from the plate supply / discharge unit 190 in that the plate supply roll shaft support 175A is used instead of the plate supply roll shaft support 175 and the plate discharge roll shaft support is used instead of the plate discharge roll shaft support 185. 185A is disposed at the free end of the plate feeding / discharging arm pair 91aA, 91bA, and two locking holes 38A, 38B are provided in addition to the locking hole 38 constituting the plate feeding / discharging arm stopping means 35. The only difference is that it has been added to the free end of.

The plate feeding roll shaft supporting means 175A has a substantially V-shaped attaching / detaching groove 175hA in place of the attaching / detaching groove 175h with respect to the plate feeding roll shaft supporting means 175.
The only difference is that a plate spring 176A is provided in place of 76. The plate feeding roll 2 has the plate feeding roll shafts 2s at both ends rotatably and detachably supported by a leaf spring 176A, and the inertia from the detachable groove 175hA when the plate supply / discharge arm pair 91aA, 91bA rotates. It is supported so that it does not come off. The spring specifications such as the spring constant of the leaf spring 176A are set so that the attaching / detaching force of the plate feeding roll shaft 2s in the plate feeding roll shaft supporting means 175A falls within a predetermined range satisfying the above supporting conditions. I have.

The plate discharging roll shaft supporting means 185A has a substantially V-shaped mounting / removing groove 185hA instead of the mounting / removing groove 185h with respect to the plate discharging roll shaft supporting means 185.
The only difference is that a leaf spring 186A is provided in place of 86. The plate discharging roll 10 is rotatably supported while the plate discharging roll shafts 9 at both ends are given a predetermined braking force by a leaf spring 186A, and is detachably supported via a detachable groove 185hA. It is supported so as not to come off from the detachable groove 185hA due to its inertia when the 91b rotates. Discharge roll 10
Since the weight gradually increases by winding up the used master 1b to which the ink has adhered, the detaching force of the plate discharging roll shaft 9 is set to be larger than the detaching force of the plate feeding roll 2 so as to fall within the range. Spring specifications such as a spring constant of the leaf spring 186A are set.

25 to 28, the leaf spring 1 formed on the inner wall of the pair of supply / discharge arm 91aA and 91bA in the attachment / detachment groove 175hA and the attachment / detachment groove 185hA.
Illustrations of escape holes for releasing one end of each of the plate springs 76A and the plate springs 186A are omitted for the sake of simplicity. Each of the above-mentioned spring guides and each relief groove is a guide groove 12.
Needless to say, the above function can be obtained even if it is formed on both sides of the 2A or the guide groove 126A.

As shown in FIG. 25, the motor 77 is provided outside the plate feeding / discharging arm 91bA between the plate feeding roll shaft supporting means 175A and the plate discharging roll shaft supporting means 185A of the plate feeding / discharging unit 190A occupying the plate feeding position. Near the top,
It is fixed via the main body side plate. The motor 77 is
It comprises a motor such as a DC motor or a stepping motor which can be driven to rotate clockwise (in the direction of arrow A in the figure) and counterclockwise (in the direction of arrow B in the figure).

The base end of each of the detachable arms 74a and 74b is
Above the outer side of the drum flange portions 12a and 12b of the printing drum 5, it is integrally attached to an output shaft 77s of a motor 77 extending in parallel with the shaft 3s of the platen roller. At the free ends of the detachable arm pairs 74a and 74b,
A plate feeding / discharge roll shaft attaching / detaching groove 75 (hereinafter, simply referred to as “attaching / removing groove 75”) and a plate feeding / plate discharging roll shaft attaching / detaching groove 76 (hereinafter, simply referred to as “attachment / detachment groove 76”), which will be described later. It is formed with its back turned.

The detachable groove 75 is provided for each cassette guide 65a,
65b, a plate feeding roll shaft 2s of the plate feeding roll 2 stored in the cassette 120A held at the master attaching / detaching position.
Plate feed roll shaft attaching / detaching means 121
The role of attaching the plate feeding roll shaft 2s to the plate feeding roll shaft supporting means 175A while removing the plate feeding roll shaft 2s from A, and supplying the master 1 supported by the plate feeding roll shaft supporting means 175A. Plate supply roll axis 2s of plate roll 2
Of the plate feeding roll shaft support means 17
5A and the plate discharging roll shaft attaching / detaching means 126
A also has a role of attaching the plate feeding roll shaft 2s to A. On the other hand, the attaching / detaching groove 76 is provided for each cassette guide 65a, 6
5b, the cassette 1 held at the master attaching / detaching position.
The plate discharging roll shaft 9 is detached from the plate discharging roll shaft attaching / detaching unit 126A by engaging with the plate discharging roll shaft 9 of the plate discharging roll 10 stored in the plate discharging roll 20A, and the plate discharging roll shaft supporting unit 185A.
And the role of attaching the plate discharging roll shaft 9 to the plate discharging roll shaft 9 of the plate discharging roll 10 which is supported by the plate discharging roll shaft supporting means 185A and is completely filled with the used master 1b by winding up all the used masters 1b. And removes it from the plate discharging roll shaft supporting means 185A, and also has a function of attaching the plate discharging roll shaft 9 to the plate feeding roll shaft attaching / detaching means 121A.

As shown in detail in FIG. 26, the groove width at the open end of the detachable groove 75 is larger than the outer diameter of the plate feeding roll shaft 2s.
The groove width at the open end of the detachable groove 76 is slightly smaller than the outer diameter of the plate discharging roll shaft 9. Removable groove 7
5, a spring guide 75a is provided on one side wall.
Are provided on the outer side of the groove 75b for releasing a deformed portion of the spring guide portion 75a when the plate feeding roll shaft 2s is attached or detached.
Are formed respectively. Similarly, a spring guide 76a is provided on one side wall of the attachment / detachment groove 76, and a spring guide 76a at the time of attachment / detachment of the plate discharge roll shaft 9 is provided outside the spring guide 76a.
An escape groove 76b is formed to allow the bent portion of the wire to escape. Plate feeding roll shaft 2s in the detachable groove 75
Is greater than the attaching / detaching force of the plate feeding roll shaft 2s with respect to the shaft fixing portion 125 and the guide groove 122A in the plate feeding roll shaft attaching / detaching means 121A, and the attaching / detaching force of the plate feeding roll shaft 2s in the plate feeding roll shaft supporting means 175A. Each of them is set to be small and at least larger than about half of the weight of the unused plate feeding roll 2U. The attaching / detaching force of the plate discharging roll shaft 9 in the attaching / detaching groove 76 depends on the plate discharging roll shaft attaching / detaching means 12.
6A: Attaching / detaching force of plate discharging roll shaft 9 to shaft fixing portion 130 and guide groove 127A, and plate discharging roll shaft supporting means 185
A is set to be smaller than the attaching / detaching force of the plate discharging roll shaft 9 at A, and to be at least larger than half of the own weight of the plate discharging roll 10 which is full of the used master 1b.

Next, the operation of the second embodiment will be described focusing on the differences from the first embodiment. First, an unused plate feeding roll 2U and an unused plate discharging roll 10U (plate discharging roll) are used by using a cassette 120A in which the plate feeding roll shaft 2s and the plate discharging roll shaft 9 of the unused plate feeding roll 2U are set as shown in FIG. A description will be given of a master initial setting in which the shaft 9) is set in the plate supply / discharge unit 190A and the master 1 is wound around the outer peripheral surface of the printing drum 5 and supplied. First, in FIG. 25, the cassette 120A is set to the master attaching / detaching position in the same manner as in the first embodiment. At this time, the plate supply / discharge arm stop means 35 (shown in FIG. 6) is operating, and the plate supply / discharge unit 190A
Is stopped at the home position (plate feeding position or fixed position) shown only in FIG. That is, plate feeding roll shaft support means 175A in plate feeding / discharging unit 190A.
And the state in which the plate discharging roll shaft supporting means 185A is located on the rotation locus 78, in other words, the plate feeding roll shaft supporting means 1
75A occupies the plate feeding roll shaft setting position, and the plate discharge roll shaft support means 185A occupies the plate discharging roll shaft setting position. The detachable arm pair 74a, 74b
FIG. 25 above the two-axis fixing portions 125 and 130 of OA.
Waiting at the standby position shown in.

Next, when the master set key is pressed, all the subsequent operations are automatically performed. First, the motor 77 is rotated clockwise to rotate the pair of detachable arms 74a and 74b in the direction of arrow A3 in the figure, and the detachable grooves 76 of the pair of detachable arms 74a and 74b engage with both ends of the plate discharging roll shaft 9. The plate discharging roll shaft 9 is removed from the plate discharging roll shaft attaching / detaching means 126A.

Next, when the motor 77 is further driven to rotate, the detachable arm pair 74a, 74b
The plate discharge roll shaft support means 185 is further rotated in the
A, a plate discharging roll shaft 9 is attached to A, and an unused plate discharging roll 10
U is attached to the plate supply / discharge unit 190A.

Next, the motor 77 is driven to rotate counterclockwise in the reverse direction, so that the detachable arm pair 74a, 74a
Only b is reversely rotated in the direction of arrow B3 and returns to the original standby position. Thereafter, by the same operation as in the first embodiment, when the printing drum 5 and the plate feeding / discharging unit 190A together make a round around the rotation center axis 6 and occupy the plate feeding position, the plate feeding / discharging arm stopping means 35 operates. Then, the plate feeding / discharging unit 190A is stopped at the same plate feeding position. When the plate feeding / discharging unit 190 is stopped at the plate feeding position, the motor 77 is driven to rotate counterclockwise in FIG. 25, and the detachable arm pair 74a, 74b is rotated in the direction of arrow B3, and the detachable arm pair 74a is turned on. , 74b are engaged with both ends of the plate feeding roll shaft 2s, and the plate feeding roll shaft 2s is removed from the plate feeding roll shaft attaching / detaching means 121A.

Next, the motor 77 is further rotated in the counterclockwise direction, whereby the detachable arm pair 74a, 74a,
74b is further rotated in the direction of arrow B3, and the plate feeding roll shaft 2s is mounted on the plate feeding roll shaft supporting means 175A.
At this time, the master feeding roll 2 is mounted on the plate feeding / discharging unit 190A while the master 1 pulled out from the master feeding roll 2 is guided to the upper outer peripheral surface of the platen roller 3. Next, when the motor 77 is reversely driven clockwise, only the detachable arm pair 74a, 74b is reversely rotated in the direction of arrow A3 and returns to the original standby position.

In FIG. 25, the master 1 extending from the outer peripheral surface of the printing drum 5 at the upper left to the upper outer peripheral surface of the platen roller 3 and the plate feeding roll 2 mounted on the plate feeding roll shaft support means 175A is used. Although a slight slack similar to that in Example 1 occurs, it is removed by the same operation as in Example 1.

Next, as in the first embodiment, plate making and plate discharging are performed simultaneously, and then a printing process is performed. In this manner, the operations of the plate making / plate feeding, plate discharging, and printing processes are repeated, and the master 1 of the plate feeding roll 2 is completely used up, and all of the masters are used as the used master 1b on the plate discharging roll shaft 9 of the plate discharging roll 10. When the plate discharge roll 10 is wound up and becomes full with the used master 1b, the plate supply / discharge arm stopping means 3
5, the stop state of the plate feeding / discharging unit 190A at the plate feeding position shown in FIG. 25 is released. Then, the plate feeding / discharging unit 190A and the printing drum 5 are integrally connected by operating the plate feeding / discharging friction clutch 92, and the drum driving unit 230 is operated, so that the plate feeding / discharging unit 190A and the printing drum 5 are connected together. 27 is rotated about one rotation in the direction of arrow B in the figure to the vicinity of the position shown in FIG.

In FIG. 27, the plate supply / discharge arm stopping means 3
When the solenoid 37 in FIG. 6 is turned on, the guide pin 36 is fitted into the locking hole 38A of the plate feeding / discharging arm 91aA. Stop at the position that occupies the axis setting position. Next, the motor 77 is driven to rotate in the counterclockwise direction, and the detachable arm pair 74a,
74b is rotated in the direction of arrow B3 in FIG.
The detachable groove 75 of 4a, 74b is used plate roll supply shaft 2s'
And the used plate feeding roll shaft 2s' is removed from the plate feeding roll shaft support means 175A. By further rotating the motor 77 in the counterclockwise direction, the detachable arm pair 74a, 74b is further rotated in the direction of arrow B3, and the used plate feeding roll shaft 2s is attached to the plate discharging roll shaft attaching / detaching means 126A of the cassette frame 120fA. '(Indicated by a virtual line in the figure) is attached. Thereafter, the motor 77 is driven to rotate clockwise, so that the detachable arm pair 74 is mounted.
Only a and 74b are rotated in the direction of the arrow A3, stopped at a substantially horizontal position (indicated by a virtual line in the figure) where they do not interfere with or interfere with the outside protruding portion of the plate feeding / discharging unit 190A, and stand by. ing.

Next, the plate supply / discharge arm stop means 35 is operated, and the plate supply / discharge unit 190A and the printing drum 5 are released from the position where the plate supply roll shaft support means 175A occupies the plate discharge roll shaft setting position. Next, the drum driving means 230 operates to rotate the plate feeding / discharging unit 190A and the printing drum 5 together near the position shown in FIG. In FIG. 28, when the plate supply / discharge arm stop means 35 is operated and the solenoid 37 shown in FIG. 6 is turned on, the guide pin 3 is inserted into the locking hole 38B of the plate supply / discharge arm 91aA.
6, the plate feeding / discharging unit 190A is stopped at the position where the plate discharging roll shaft support means 185A occupies the plate feeding roll shaft setting position. Next, when the motor 77 is driven to rotate clockwise, the detachable arm pair 74 is rotated.
a, 74b are rotated in the direction of arrow A3 in the figure, and the detachable grooves 76 of the detachable arm pairs 74a, 74b are engaged with both ends of the used plate discharging roll shaft 9 ', and the used plate discharging roll 10 from the plate discharging roll shaft support means 185A. 'Used plate discharging roll shaft 9' is removed. When the motor 77 is further rotated clockwise, the detachable arm pair 74a, 74b is further rotated in the direction of arrow A3, and the cassette frame 1 is rotated.
A used plate discharging roll shaft 9 '(both indicated by a virtual line in the figure) of the used plate discharging roll 10' is attached to the plate feeding roll shaft attaching / detaching means 121A of 20fA. Thereafter, when the motor 77 is driven to rotate counterclockwise in the reverse direction, only the detachable arm pair 74a, 74b is reversely rotated in the direction of arrow B3, and
It is stopped and waits at a substantially horizontal position (indicated by a virtual line in the figure) where it does not interfere with or interfere with the outside protruding portion of the plate supply / discharge unit 190A.

(Modification 1 of Embodiment 1) FIG.
(Modification 1 according to the third aspect of the present invention). In the figure, reference numeral 700B denotes a stencil printing machine, and reference numeral 701B denotes a frame of the stencil printing machine. This modification 1 is different from the first embodiment in that cassette guides 65a and 65b as holding means, detachable arm pairs 66a and 66b as plate feeding roll axis moving means, detachable arm pairs 70a and 70a as plate discharging roll axis moving means. 70b, the only difference is that a motor 69 as a plate-supply roll axis movement driving means and a motor 73 as a plate-discharge roll axis movement driving means are arranged on the side of the printing drum 5 in the longitudinal direction of the rotation center shaft 6.

In the stencil printing machine 700B, reference numeral 100 denotes an original reading device, reference numeral 105 denotes a printing drum unit which is wound around the outer peripheral surface of the stencil master 1a and prints on printing paper P, and reference numeral 101 denotes a paper feeder. Reference numeral 106 denotes a sheet feeding device that sends the printing paper P stacked on the table 102 to the printing drum unit 105, and reference numeral 106 denotes a sheet discharging device that discharges the printed printing paper P ′ printed by the printing drum unit 105 to a sheet discharging table 107. The devices are respectively shown. Reference numeral 103 denotes a paper feed roller;
Reference numerals a and 104b denote separation roller pairs, respectively. The paper feed roller 103 constituting the paper feed device 101 and the separation roller pair 1
The reference numerals 04a and 104b, the sheet supply table 102, and the pair of registration rollers 24a and 24b are arranged at positions not interfering with the operation of the output shaft 69s of the motor 69 and the operation of the pair of detachable arms 66a and 66b.

(Modification 2 of Embodiment 2) Note that the present invention is not limited to Modification 1 of Embodiment 1,
A second modification of the second embodiment described below may be adopted (a modification of the invention according to claim 4). Modification 2
Although not shown in the drawings, cassette guides 65a and 65b as holding means, detachable arm pairs 74a and 74b as roll axis moving means, and a motor 77 as roll axis moving driving means are not shown in FIG. Is provided only on the side of the printing drum 5 in the longitudinal direction of the rotation center shaft 6.

(Modifications 3 and 4 of Embodiment 1) FIG. 30 shows a modification 3 of the cassette 120 used in the first embodiment for attaching and detaching the master of the stencil type stencil printing apparatus 700 (modification according to the eighth aspect of the invention). Example) is shown.

In the figure, reference numeral 120B denotes the cassette of the third modification, and reference numeral 120fB denotes the cassette frame of the third modification as the main body of the cassette for attaching and detaching the master. In the third modification, the plate feeding roll shaft attaching / detaching unit 121 and the plate discharging roll shaft attaching / detaching unit 126 are made of a material having a strength greater than that of the cassette frame 120fB with respect to the cassette 120 of the first embodiment.
The only difference is that it is separable from B.

The cassette frame 120fB is made of, for example, cardboard having a thickness of 2 mm. Cassette frame 120
The shape of fB is formed by cutting out the forming portions of the plate feeding roll shaft attaching / detaching means 121 and the plate discharging roll shaft attaching / detaching means 126 as shown by the broken line in FIG. Only differ.

Reference numeral 135 denotes the plate feeding roll shaft attaching / detaching means 12.
1 and a shaft groove reinforcing member for reinforcing the plate discharging roll shaft attaching / detaching means 126. Shaft groove reinforcing member 135 shown in a satin pattern in the drawing
Is slightly larger than the cassette frame 120fB so as to cover the front and rear side walls and the upper wall of the cassette frame 120fB, and is made of, for example, a synthetic resin made of polyphenylene sulfide (PPS) having a thickness of 2 mm. The plate feeding roll shaft attaching / detaching unit 121 and the plate discharging roll shaft attaching / detaching unit 126 are integrally formed as a part of the shaft groove reinforcing member 135. The shaft groove reinforcing member 135 is adhered to the cassette frame 120fB so that it can be easily separated from the cassette frame 120fB.

The cassette frame 120fB is not limited to the above-mentioned cardboard, but may be made of, for example, cardboard or wood. The method of connecting the shaft groove reinforcing member 135 to the cassette frame 120fB is not limited to the above-described adhesive connection, and for example, as shown in FIG. 31, may be connected using a well-known resin clip 136. . Clip 13
Reference numeral 6 denotes a well-known fastening means integrally formed with a flange-shaped projection for fitting at least one of the hole walls formed in the members to be joined and joining the members together. In this case, a fastening hole (not shown) slightly larger than the fitting diameter of the clip 136 is opened in a predetermined location on the shaft groove reinforcing member 135 side, and the clip 13 is formed on the cassette frame 120fB side.
A hole (not shown) slightly smaller than the fitting diameter of No. 6 is opened at a predetermined position, and a clip 136 is inserted from the outside of the fastening hole of the shaft groove reinforcing member 135 and fitted into the hole, and the cassette frame 120fB and the shaft are fitted. The groove reinforcing member 135 is connected.

FIGS. 32 and 33 show a fourth modification of the third modification. In FIG. 32, reference numeral 120C denotes a cassette of Modification 4, and reference numeral 120fC denotes a cassette frame of Modification 4 as a main body of the master detachable cassette. The cassette 120C according to the fourth modification is similar to the cassette 120C according to the third modification.
Supply roller shaft attaching / detaching means 1 for cassette 120B
21 is a plate feeding roll shaft attaching / detaching unit 121C, and a plate discharging roll shaft attaching / detaching unit 1 is
26C, each of which has a shaft groove reinforcing member 13 made of synthetic resin.
The only difference is that a metal shaft groove reinforcing member 135C is provided instead of 5.

The cassette frame 120fC is different from the shape of the cassette frame 120fB only in that the cassette frame 120fC is notched so as not to overlap with the plate feeding roll shaft attaching / detaching means 121C and the plate discharging roll axis attaching / detaching means 126C.

The shaft groove reinforcing member 135C is made of, for example, cold leaf spring steel. The plate feeding roll shaft attaching / detaching unit 121C and the plate discharging roll shaft attaching / detaching unit 126C are provided in the shaft groove reinforcing member 135 as clearly shown in the plan view before forming shown in FIG.
It is integrally molded as a part of C. Shaft groove reinforcing member 13
5C is adhered to the cassette frame 120fC so that it can be easily separated from the cassette frame 120fC. 32, reference numeral 125C denotes a plate fixing roll shaft attaching / detaching means 121C, reference numeral 130C denotes a shaft fixing portion of the plate discharging roll shaft attaching / detaching means 126C, reference numeral 122C denotes a plate supplying roll shaft guide groove, and reference numeral 127C denotes a plate discharging roll shaft. Each shows a guide groove. In FIG. 33, reference numeral 135C ′ denotes a reference numeral 1 of the shaft groove reinforcing member 135C before molding.
21C 'is the plate feeding roll shaft attaching / detaching means 121C before molding.
Reference numeral 126C 'denotes a plate discharging roll shaft attaching / detaching means 126 before molding.
Each of the unfolded shapes of C, that is, the stripping state is shown. Symbol c indicates a break before molding. Shaft groove reinforcing member 1
35C 'is formed into a shape shown in FIG. 32 by a known cold forming method. The dimensions and the spring specifications of the plate feeding roll shaft attaching / detaching unit 121C and the plate discharging roll shaft attaching / detaching unit 126C are set to be the same as the functions of the plate feeding roll shaft attaching / detaching unit 121 and the plate discharging roll shaft attaching / detaching unit 126. .

Although the cassette frame 120fC is made of cardboard, it is not limited to this cardboard, but may be made of cardboard, wood, or any of the various synthetic resins described above. . The method of connecting the shaft groove reinforcing member 135C to the cassette frame 120fC is not limited to the above-described adhesive connection, and may be connected using, for example, a well-known resin clip 136 as shown in FIG. An axial groove reinforcing member 135C after cold forming a projecting iron stud having the same function as the clip 136
May be used, or a combination of these bonding methods may be used.

That is, in the above-described third and fourth modifications, the shaft groove reinforcing members 135 and 135C, the plate feeding roll shaft attaching / detaching means 121 and 121C, and the plate discharging roll shaft attaching / detaching means 12
6, 126C and cassette frames 120fB, 120f
Various combinations of materials with C and a joining method are conceivable in addition to those described above.
1, 121C and plate discharging roll shaft attaching / detaching means 126, 126
C is made of a material having higher strength than the cassette frames 120fB and 120fC, and
It suffices if it is separably connected to 0fB and 120fC.

(Embodiment 3) FIGS. 34 and 35 show Embodiment 3 according to the seventh, ninth, eleventh and twelfth aspects of the present invention.

The third embodiment differs from the first embodiment in that a cassette guide 65D is provided instead of the cassette guides 65a and 65b of the first embodiment.
Using cassette 120D instead of 0, cassette 1
20D, the plate feeding roll shaft 2s, and the plate discharging roll shaft 9 are different only in that both are made of a combustible material.

Reference numeral 120fD indicates a cassette frame as a main body of the cassette 120D. Cassette frame 1
20fD is made of cardboard. Cassette frame 12
Below the 0fD, a pair of left and right open / close covers 140a having a double-opening structure that can be opened / closed with the unused plate supply roll 2U or plate supply roll 2 and unused plate discharge roll 10U (plate discharge roll shaft 9) or plate discharge roll 10 stored therein. , 14
0b (hereinafter sometimes referred to as “open / close cover pair 140a, 140b”) is provided integrally. Lower end of left and right side wall of cassette frame 120fD and open / close cover pair 14
0a, 140b, the cassette frame 12
Open / close cover pair 140
A shallow groove or a shallow cut is formed so that a and 140b can be freely opened and closed. An insertion portion 141 is provided at the open end of the opening / closing cover 140a.
An insertion groove 142 is formed at the open end of 40b for inserting and holding the insertion portion 141.

The plate supply roll shaft 2s and the plate discharge roll shaft 9
Both are made of paper.

As shown in FIG. 35, the cassette guide 65
D is integrally formed of a metal such as stainless steel, and has a substantially hat-shaped cross section. A space for accommodating the main body of the cassette frame 120fD of the cassette 120D is formed in the center of the cassette guide 65D. On the other hand, a channel-shaped cover set in which a set groove 65Dm for accommodating, holding, and setting each of the open / close covers 140a, 140b in a state where each open / close cover 140a, 140b is opened is formed in the lower portion of the left and right side walls of the cassette guide 65D. The parts 65Da and 65Db are integrally formed. Although the width of the set groove 65Dm in the cover set portions 65Da and 65Db in the height direction is somewhat exaggerated in the drawing, the set positioning of the cassette 120D with respect to the cassette guide 65D is reliably performed in the three-dimensional direction. It has become so.

Next, the operation of attaching and detaching the cassette 120D to and from the master attaching / detaching position will be described. When using the cassette 120D,
With the respective opening / closing covers 140a, 140b being manually opened, the respective set grooves 65 of the respective cover setting portions 65Da, 65Db are set.
Dm, the main body of the cassette frame 120fD is set at the center of the cassette guide 65D, and after the cassette 120D is used, the used cassette 120D is used.
And the insertion portion 141 of the cover 140a is inserted into the insertion groove 142 of the cover 140b.
0b is manually closed.

Therefore, according to the third embodiment, when setting the master or discarding the discharged master, the setting of the master is made easier and the hand of the user or the like is not stained. Also, when discarding the discharged master, the discharged paper roll gear 51 can be removed from the used discharged paper roll shaft 9 stored and set in the used cassette 120D.
1 can be recycled, and the cassette frame 120fD, the plate feeding roll shaft 2s, and the plate discharging roll shaft 9 are both made of combustible material such as paper, so that the used cassette 120D can be discarded as separated garbage. There are advantages that can be done. In addition, by disposing the pair of open / close covers 140a and 140b in the cassette 120D, the pair of open / close covers 140a and 140b can be used after using the cassette 120D.
Since b can be easily closed, there is an advantage that when the used cassette 120D is discarded, it is possible to more reliably prevent the hands and the trash box from being stained. In addition, in storage and handling before use of the cassette 120D, the pair of open / close covers 140a, 1
The fact that the 40b is easily closed also helps to prevent dust from adhering to the master 1 due to intrusion of dust into the cassette 120D.

Incidentally, the cassette frame 120fD is not limited to the above-mentioned thick paper, but may be made of, for example, cardboard or wood. The cassette guide 65D is not limited to the above metal, and may be made of the above synthetic resin.
Further, the open / close cover pair 140a, 140b may be separately provided on the cassette frame 120fD so as to be openable and closable via an adhesive tape, a hinge, or the like. In this case, the open / close cover pair 140a, 140b is not limited to the above-mentioned cardboard, cardboard, wood, or the like, and may be made of a synthetic resin or the like.

In the third embodiment, the plate feeding roll shaft attaching / detaching means 121 and the plate discharging roll axis attaching / detaching means 126 made of cardboard are used.
At least once or twice the plate feeding roll shaft 2 so as to have the same function as the plate feeding roll shaft attaching / detaching unit 121 and the plate discharging roll shaft attaching / detaching unit 126 made of synthetic resin in the first embodiment.
s and the plate discharging roll shaft 9 can be attached and detached. In addition, when the user wants the plate feeding roll shaft attaching / detaching unit 121 and the plate discharging roll shaft attaching / detaching unit 126 which can withstand the use of the plate feeding roll shaft 2 s and the plate discharging roll shaft 9 more, the above-described modification examples 3 and 4 will be described. Shaft groove reinforcing member 13
5,135C may be appropriately added.

FIG. 36 shows a fifth modification of the third embodiment (a modification according to the tenth aspect of the present invention). Symbol 120E
Denotes a cassette of Modification Example 5. The cassette 120E is different from the cassette 120D of the third embodiment in that the cassette 120E
After use, the used plate discharging roll shaft 9 and the used plate feeding roll shaft 2s are connected to the cassette frame 1 of the cassette 120E.
When reset to 20 fD, each open / close cover 140
The torsion coil spring 143 as an automatic closing means for automatically closing the open / close covers 140a, 140b
The only difference is that the b is provided in the vicinity of the opening / closing section. Although the location of the torsion coil spring 143 is partially omitted, each end is the front and rear end of the cassette frame 120fD, the left and right inner side walls, and the other end is each open / close cover 140.
The opening / closing cover pair 140a, 140b is disposed at four positions so as to be engaged with the left and right inner walls at the front and rear ends of the opening / closing covers 140a, 140b.

Next, an operation of attaching and detaching the cassette 120E to and from the master attaching / detaching position will be described. When using the cassette 120E,
The main body of the cassette frame 120fD is set in the cassette guide 65D while setting the respective open / close covers 140a, 140b in the set grooves 65Dm of the cover set portions 65Da, 65Db in a state of being manually opened against the urging force of the torsion coil spring 143. Set at the center. Cassette 120
After the use of D, the used cassette 120E is pulled out from the cassette guide 65D, and the torsion coil spring 143 is used.
The opening / closing cover pair 140a, 140b is automatically closed by the urging force.

Therefore, according to the fifth modification, the respective advantages of the third embodiment can be more reliably obtained, and after the cassette 120E is used, the pair of open / close covers 140a and 140b is automatically turned by the urging force of the torsion coil spring 143. The cover 14 is closed as shown in FIG.
There is also an advantage that a cumbersome operation of manually closing Oa and 140b is not required.

The plate feeding roll shaft supporting means is not limited to the plate feeding roll shaft supporting means 175 and 175A of the first and second embodiments, but may be a plate feeding roll shaft supporting means 175F as shown in FIGS. 37 and 38. (Variation 6 of Embodiment 1).

The plate supplying roll shaft supporting means 175F is mainly composed of a detachable groove 175hF, a torsion coil spring 176F, a pair of gripping arms 177a and 177b, a connecting rod 178, a fulcrum shaft 179, a permanent magnet 181 and a permanent magnet 182, which will be described later. Have been.

In both figures, reference numerals 177a and 177b denote a pair of left and right gripping arms (hereinafter, "a gripping arm pair 177").
a, 177b "). The pair of gripping arms 177a and 177b have a function of selectively gripping and rotatably supporting the plate feeding roll shaft 2s, and have a substantially semi-circular shape. The gripping arm pair 177a, 177b is rotatable via a fulcrum shaft 179 loosely fitted at each lower end. The fulcrum shaft 179 has a torsion coil spring 176F.
Is wound. One end of the torsion coil spring 176F is attached to the lower end of the grip arm 177a.
The other end of the holding arm 6F is engaged with the lower end of the holding arm 177b, and the torsion coil spring 176F urges the holding arm pair 177a and 177b in a direction to open each other. At the center of the fulcrum shaft 179, the upper end of a connecting rod 178 extending downward is fixed. An arm guide groove 1 having a substantially V-shaped cross section for guiding the gripping arm pairs 177a and 177b and the connecting rod 178 so as to be able to move up and down is provided substantially in the center of the free ends of the plate feeding and discharging arm pairs 91a and 91b.
75 hF is formed. Arm guide groove 175hF
A guide stopper 175 sF is formed at the lower end of the pair of gripping arms 177 a and 177 b, which determines the bottom dead center of the pair of gripping arms 177 a and 177 b and engages with the lower ends of the gripping arm pairs 177 a and 177 b.
At the lower end of the connecting rod 178, a permanent magnet 181 is fixed. An S pole is disposed below the permanent magnet 181, and the N pole is not shown. Arm guide groove 17
A magnet guide hole 1 for guiding the ascending / descending permanent magnet 181 is provided in the plate supply / discharge arm pair 91a, 91b at the lower part of 5hF.
83 are formed. The arm guide groove 175hF is
It communicates with the magnet guide hole 183 via a connecting rod guide hole 178a formed at the lower part of the guide stopper 175sF for guiding the ascending and descending connecting rod 178.

The upper end of the magnet guide hole 183 serves as a stopper for determining the upper dead point of the pair of gripping arms 177a and 177b and colliding with the upper end surface of the permanent magnet 181. The rotatable permanent magnet 1 is provided at the lower end of the magnet guide hole 183.
82 are arranged. A rotating shaft (not shown) rotatably supported by the free end walls of the plate feeding / discharging arms 91a and 91b is provided at the center of the S pole and the N pole of the permanent magnet 182.
Is fixed. Further, an arm (not shown) is fixedly provided at the outer end of the rotating shaft, and the plate feeding / discharging unit 19 is provided.
When 0 (not shown in both figures) occupies the plate feeding position, the actuator (both not shown) connected to a drive motor fixed to the main body side plate engages with the arm, and a permanent The magnet 182 is rotated.

Next, an operation of attaching and detaching the plate feeding roll shaft 2s by the plate feeding roll shaft supporting means 175F will be described. When the plate supply / discharge unit 190 (not shown in both figures) occupies the plate supply position, first, the actuator and the arm are engaged. Plate feeding roll shaft support means 175F with plate feeding roll shaft 2s
When attaching the permanent magnet 1 as shown in FIG.
The arm is rotated and held by the actuator so that the S pole of 81 and the S pole of the permanent magnet 182 face and repel magnetically, and the gripping arm pair 177a, 177b is in a gripping standby state. It is in. Next, the plate supply roll shaft 2s is moved by the detachable arm pair 66a, 66b.
When the drive motor is conveyed into the pair of gripping arms 177a and 177b, the drive motor receives a timing signal from an appropriate detection unit based on the above operation and drives the actuator to rotate, whereby the permanent magnet 182 in the state shown in FIG.
Is rotated half a turn, and the N pole of the permanent magnet 182 occupies the upper surface position. When the N pole of the permanent magnet 182 occupies the upper surface position, the S pole of the permanent magnet 181 is magnetically attracted to the N pole of the permanent magnet 182, and the plate feeding roll shaft 2s is moved to the pair of gripping arms 177a and 177b. While being gripped, the outer ring portion of the gripping arm pair 177a, 177b is
It occupies the bottom dead center position while being slid and guided on the slope of hF. In this way, as shown in FIG.
Is rotatably gripped and supported by a pair of gripping arms 177a and 177b. On the contrary, when removing the plate-supply roll shaft 2s from the plate-supply roll shaft support means 175F, the above operation is performed in reverse.

The configuration of the plate feeding roll shaft supporting means 175F as shown in FIGS. 37 and 38 is the same as that of the plate discharging roll shaft supporting means 185F and 185A of the first and second embodiments. It is needless to say that the present invention can be applied as shown in parentheses in FIG. 38).

The plate-supply roll shaft holding means comprising the detachable groove 67 of the pair of detachable arms 66a, 66b and the spring guide 67a is not limited to this. For example, as shown in FIG. The magnetic cap 2J is fitted to and fitted with the magnetic cap 2J, and the detachable groove 67 of the detachable arm pair 66a, 66b is configured as an electric magnet.
May be gripped or released only by the attachment / detachment groove 67 by the on / off switching operation of the electric magnet. Similarly,
The plate discharging roll shaft gripping means including the mounting groove 71 of the pair of mounting and demounting arms 70a, 70b and the spring guide 71a is not limited to this, and may have the same configuration as the plate feeding roll shaft gripping means shown in FIG. .

The cassette of the first embodiment is the same as the cassette 1
The cassette 120G is not limited to 20 and may be a cassette 120G as shown in FIG. The cassette 120G is different from the cassette 120 in that the plate feeding roll shaft attaching / detaching means 121G is replaced with the plate discharging roll axis attaching / detaching means 126
The only difference is that a plate discharge roll shaft attaching / detaching means 126G is formed in place of. Plate feeding roll shaft attaching / detaching means 121G
Are plate feed roll shaft guide grooves 12 formed to be larger and wider than the outer diameter of the plate feed roll shaft 2s toward the opening end thereof.
2G and a spring guide 124G. The plate discharging roll shaft attaching / detaching means 126G includes a plate discharging roll shaft guide groove 127G and a spring guide 129G which are formed to be larger and wider than the outer diameter of the plate discharging roll shaft 9 toward the opening end. Reference numeral 125G denotes a shaft fixing unit having the same function as the shaft fixing unit 125, and reference numeral 130G denotes a shaft fixing unit having the same function as the shaft fixing unit 130. Cassette 120
Since G has the above-described structure, when attaching / detaching the plate feeding roll shaft 2s or the plate discharging roll shaft 9, it is possible to easily attach / detach the plate supplying roll shaft 2s or the plate discharging roll shaft 9 regardless of a slight displacement. There is. The same structure can be applied to the plate feeding roll shaft supporting means 175 and 175A and the plate discharging roll shaft supporting means 185 and 185A.

It is needless to say that the characteristic configurations of the third to sixth modifications and the third embodiment can be applied to the cassette 120A used in the second embodiment.

As described above, according to each of the above-described embodiments and the above-described modified examples, a cutter for cutting a master such as a conventional stencil printing machine is not required. Even when the film is made of substantially only a thermoplastic resin film, no trouble occurs in transportation.

Further, according to each of the above-described embodiments and the above-described modified examples, the thermal head 4 is provided on the printing apparatus main body side as plate making means which can freely contact and separate from the platen roller 3.
There is no need to rotate the heavy and large thermal head 4 integrally with the printing drum 5. Also, in supplying electric signals to the thermal head 4, it is not necessary to use an expensive and low-reliable one such as a rotary coupling connector used in the device described in Japanese Patent Publication No. 5-70595. .

According to each of the above-described embodiments and the above-described modified examples, the plate discharging roller driving means 55 for driving the plate discharging roller shaft 9 of the plate discharging roll 10 and the platen roller driving means 210 for driving the platen roller 3 to rotate are connected to the printing apparatus. Since it is provided on the main body side, it is not necessary to rotate it during printing while being integrated with the printing drum 5, and its inertia can be reduced.

The ink supply means is not limited to those in the above-described embodiments and the like. For example, an ink supply means provided with a squeegee blade 41 as described in JP-A-5-69649, It may be a well-known means as described in Japanese Patent No. 42873.

The stencil printing machines 700, 700
The impression cylinder 115 was used as the pressing means for A and 700B.
The invention is not limited to this, and it goes without saying that a press roller or the like described in JP-A-5-229241 may be used.

The plate discharge arm stopping means 35 is provided only on the plate supply / discharge arm 91a in the above-described embodiments and the like, but is not limited to this, and may be additionally provided on the plate supply / discharge arm 91b. .

In the above embodiments, the thickness of the master is 3
μm, but 2 to 10 μm can be used in a good condition. Further, in the above-described embodiments and the like, a master substantially composed of only a thermoplastic resin film is used. However, the present invention is not limited to this, and a conventional stencil master using Japanese paper or the like as a porous support, or a porous support It goes without saying that a stencil master whose body is extremely thin can also be used.

The cross-sectional shapes of the plate feeding roll shaft and the plate discharging roll shaft are not limited to those described above, but may be a pipe shape.

In the above embodiment and the like, the cassette 12
Although it is described that the entire 0,120A is discarded, the present invention is not limited to this, and it goes without saying that the used plate feeding roll shaft, plate discharging roll shaft, and cassette frame may be recycled.

In the invention according to the first aspect, the plate supply / discharge unit having the plate supply roll shaft support means and the plate discharge roll shaft support means is the plate supply / discharge unit 19 of the above embodiment.
0,190A, etc., for example, described in Japanese Patent Application Laid-Open No. 6-270524 already proposed by the present applicant.
Plate feeding units 70, 70A and plate discharging units 80, 80
A, etc., or a plate receiving / discharging unit described in Japanese Patent Publication No. 5-70595 and the like. Means, a plate feeding roll axis moving means, a plate discharging roll axis moving means, a master feeding / removing device including the plate feeding roll axis moving driving means, the plate discharging roll axis moving driving means, or the like, or the roll axis moving means and the roll A master automatic attachment / detachment device including a shaft movement driving means or the like may be attached and used mutatis mutandis.

[0166]

As described above, according to the first aspect of the present invention, by using the master detachable cassette,
The setting of the master in the stencil type stencil printing machine and the removal and disposal of the used master are performed via the plate feeding roll axis moving means, the plate feeding roll axis moving driving means, the plate discharging roll axis moving means, and the plate discharging roll axis moving driving means. When the master is set or when the used master that has been discharged is discarded, the setting of the master is made easier and the hand of the user or the like is not stained.

According to the second aspect of the present invention, the master discharge roll shaft is detachably mounted on the plate feeding roll shaft attaching / detaching means, and the plate feeding roll shaft is detachably mounted on the plate discharging roll shaft attaching / detaching means. By using the cassette, the setting of the master in the stencil type stencil printing apparatus and the removal and disposal of the used master are performed via the roll axis moving means and the roll axis moving driving means, each of which is constituted by one. Since it is performed automatically, in addition to the effect of the invention described in claim 1, the device for automatically attaching and detaching the master as described above can be simplified by reducing the number of parts.

According to the third aspect of the present invention, the holding means,
Plate feeding roll axis moving means, plate discharging roll axis moving means, plate feeding roll axis moving driving means and plate discharging roll axis moving driving means,
By arranging it on the side of the printing drum in the longitudinal direction of the rotation center axis, in addition to the effect of the invention according to claim 1,
Since the space is formed above the printing drum in the longitudinal direction of the rotation center axis, the height of the stencil printing machine can be set low.

According to the invention described in claim 4, the holding means,
By disposing the roll axis moving means and the roll axis moving driving means on the side of the printing drum in the longitudinal direction of the rotation center axis, a space is formed above the printing drum in the longitudinal direction of the rotation center axis, In addition to the effect of the invention described in claim 2, the height of the stencil type stencil printing apparatus can be set low.

According to the fifth aspect of the present invention, when the plate feed roll shaft is in the master detachable cassette, the plate feed roll shaft fixing portion supports the plate feed roll shaft without rotating it in a normal handling state. The plate feed roll shaft guide groove, which is smaller than the outer diameter of the plate feed roll shaft, can support the plate feed roll shaft without falling off the groove. On the other hand, when the plate feed roll shaft is pulled out of the master detachable cassette, the plate feed roll shaft can be removed via the plate feed roll shaft guide groove. Similarly, when the plate discharging roll shaft is in the cassette for attaching and detaching the master, the plate discharging roll shaft fixing portion can support the plate discharging roll shaft without rotating the plate discharging roll shaft, and has a plate discharging roll shaft smaller than the outer diameter of the plate discharging roll shaft. With the guide groove, the plate discharging roll shaft can be supported without falling off from the groove.
On the other hand, when the plate discharging roll shaft is removed from the master detachable cassette, the plate discharging roll shaft can be removed via the plate discharging roll shaft guide groove.

According to the sixth aspect of the present invention, the rotation transmitting member for transmitting the rotational driving force to the plate discharging roll shaft is detachably provided at one end of the plate discharging roll shaft. Since it is easily attached to and detached from one end, the rotation transmitting member can be used repeatedly when exchanging the cassette for attaching and detaching the master, and the cassette can be manufactured at lower cost. Further, it is possible to provide a master detachable cassette capable of separating the rotation transmitting member and other waste to be discarded when discarding the used master that has been discharged.

According to the seventh aspect of the present invention, the plate feeding roll shaft, the plate discharging roll shaft, and the master attaching / detaching cassette are made of a combustible material. Since the cassette can be incinerated, it is possible to provide a master detachable cassette capable of separating waste to be discarded.

According to the eighth aspect of the present invention, the plate supplying roll shaft attaching / detaching means and the plate discharging roll axis attaching / detaching means are made of a material having a higher strength than the main body of the master attaching / detaching cassette, and
By being detachably connected to the main body, the plate feeding roll shaft attaching / detaching means to be reused when discarded and the plate discharging roll axis attaching / detaching means are separated from the main body of the master attaching / detaching cassette to be discarded as dust. A cassette for attaching and detaching a master, which can perform sorting.

According to the ninth aspect of the present invention, since the main body of the master mounting / dismounting cassette is provided with the opening / closing cover which can be opened and closed with the plate feeding roll and the plate discharging roll housed therein, the master mounting / dismounting cassette is provided. When the cassette is used, the master detachable cassette is set on the holding means with the opening / closing cover opened, and after the master detachable cassette is used, the open / close cover of the master detachable cassette is closed. It is possible to provide a cassette for attaching and detaching a master which does not have to pollute the trash box.

According to the tenth aspect of the present invention, when the used plate discharging roll axis and the used plate feeding roll axis are reset to the main body of the master attaching / detaching cassette after the use of the master attaching / detaching cassette, the automatic closing means is provided. As a result, the opening and closing cover is automatically closed, so that it is possible to provide a cassette for attaching and detaching a master, which does not cause stains on hands and the trash can more reliably.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view illustrating a main part configuration of a stencil type stencil printing machine according to a first embodiment of the present invention.

FIG. 2 is an enlarged side sectional view showing a configuration of a main part of the first embodiment.

FIG. 3 is an enlarged partial cross-sectional plan view showing a main part configuration of the first embodiment.

FIG. 4 is a longitudinal sectional view of a main part showing a configuration around a plate supply / discharge unit according to the first embodiment.

FIG. 5 is a side sectional view of a main part showing a configuration around a thermal head contact / separation unit according to the first embodiment.

FIG. 6 is a partial cross-sectional plan view showing a configuration around a plate supply / discharge arm stopping means according to the first embodiment.

FIG. 7 is a side sectional view of a main part showing a configuration around a platen roller driving unit according to the first embodiment.

FIG. 8 is a partial cross-sectional side view of a main part showing a configuration around a plate discharging roll driving unit according to the first embodiment.

FIG. 9 is a partial cross-sectional side view illustrating a configuration around a plate-supply roll shaft support unit and a plate-discharge roll shaft support unit according to the first embodiment.

FIG. 10 is a perspective view illustrating a configuration of a main part of a detachable arm for a plate feeding roll according to the first embodiment.

FIG. 11 is a perspective view showing a configuration of a main part of a detachable arm for a plate discharging roll according to the first embodiment.

FIG. 12 is a perspective view of a main part showing a configuration of a cassette used in the first embodiment.

FIG. 13 is a partially cross-sectional side view showing, in an enlarged manner, a configuration around a plate feeding roll shaft attaching / detaching unit and a plate discharging roll shaft attaching / detaching unit used in the first embodiment.

FIG. 14 is a perspective view of a main part showing a state before assembling a plate discharging roll shaft and a plate discharging roll gear detachably mounted on the shaft according to the first embodiment.

FIG. 15 is a main part side view showing a standby state at the time of initial setting of a master according to the first embodiment.

FIG. 16 is a main part side view showing the operation of the first embodiment when the master is initially set.

FIG. 17 is a main part side view showing an operation at the time of master initial setting in the first embodiment.

FIG. 18 is a main part side view showing an operation at the time of master initial setting in the first embodiment.

FIG. 19 is a main part side view showing an operation at the time of master initial setting in the first embodiment.

FIG. 20 is a side view of a main part showing the operation of the first embodiment when the master is initially set.

FIG. 21 is a side view of a main part showing an operation at the time of master initial setting in the first embodiment.

FIG. 22 is a main part side view showing the operation of the first embodiment when the master is initially set.

FIG. 23 is a main part side view showing an operation at the time of master initial setting in the first embodiment.

FIG. 24 is an essential part side view showing an operation immediately before the end of master initial setting according to the first embodiment;

FIG. 25 is a partial cross-sectional side view showing the main configuration and operation of a stencil printing machine according to a second embodiment of the present invention.

FIG. 26 is a perspective view illustrating a configuration of a main part of a detachable arm according to a second embodiment.

FIG. 27 is a partial cross-sectional side view of a main part showing an operation of removing a used plate feeding roll shaft from plate feeding roll shaft support means by a detachable arm in Embodiment 2.

FIG. 28 is a partial cross-sectional side view of a main part showing an operation of removing a used plate discharging roll shaft from a plate discharging roll shaft supporting means by a detachable arm according to the second embodiment.

FIG. 29 is a side view showing a configuration of a main part of a first modification of the first embodiment;

FIG. 30 is a perspective view illustrating a main configuration of a cassette used in a third modification of the first embodiment.

FIG. 31 is a perspective view of a main part showing a method of connecting the shaft groove reinforcing member of the third modification to the cassette frame.

FIG. 32 is a perspective view of a main part showing a configuration of another modified example 4 of the modified example 3.

FIG. 33 is a plan view of a main part showing a plate removing configuration of a cassette used in Modification Example 4.

FIG. 34 is a partially broken perspective view showing the configuration of a cassette used in the third embodiment.

FIG. 35 is a perspective view showing a state where a cassette used in the third embodiment is set and supported on a cassette guide.

FIG. 36 is a perspective view of a partially broken main part showing a configuration of a cassette used in a fifth modification of the third embodiment.

FIG. 37 is a side sectional view of a main part showing the configuration and operation of a plate-supply roll shaft support means in Modification 6 of Example 1.

FIG. 38 is a side sectional view of a main part showing an operation of a plate-supply roll shaft supporting means in a sixth modification of the first embodiment.

FIG. 39 is a perspective view of a main part showing another example of the plate supply roll shaft.

FIG. 40 is a partial cross-sectional side view showing another modified example of the cassette used in the first embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Master for stencil 1a Master-made master 1b Used master 2 Plate-supply roll 2s Plate-supply roll axis 2U Unused plate-supply roll 3 Platen roller 4 Thermal head as plate-making means 5 Printing drum 6 Rotation center axis 9 Plate-discharge roll axis 10 Plate discharging roll 10U Unused plate discharging roll 60 Ink supply means 65a, 65b Cassette guide 66a, 66b as holding means Detachable arm as plate feeding roll axis moving means 69 Motor as plate feeding roll axis moving driving means 70a, 70b Plate discharging roll axis Attaching / detaching arm 73 as moving means 73 Motor 91a, 91b as plate discharging roll axis moving driving means Pair supply / discharge arm pair 120, 120A, 120B, 120C, 120D, 1
20E, 120G cassette 121, 121A Plate supply roll shaft attachment / detachment means 126, 126A Plate ejection roll shaft attachment / detachment means 175, 175A Plate supply roll shaft support means 185, 185A Plate ejection roll shaft support means 190, 190A Plate supply / discharge unit

Claims (12)

(57) [Claims] A stencil master wrapped around an outer peripheral surface thereof, the printing drum rotating around a rotation center axis; an ink supply means for supplying ink to an inner peripheral surface of the printing drum; Plate feeding roll shaft supporting means for removably supporting the plate feeding roll shaft of a plate feeding roll wound around a plate roll axis and supplying the master to the printing drum; plate making means for making a plate of the master; The other end of the master is wrapped around a plate discharging roll axis, and the plate discharging roll shaft supporting means for detachably supporting the plate discharging roll shaft of the plate discharging roll for winding up the used master from the printing drum, and around the rotation center axis. A plate feeding / discharging unit rotatable with respect to the printing drum and having the plate feeding roll shaft supporting means and the plate discharging roll shaft supporting means; A stencil-type plate making and printing apparatus for attaching and detaching the master using one master attaching / detaching cassette provided with a plate feeding roll shaft attaching / detaching means for freely supporting and a plate ejecting roll axis attaching / detaching means for detachably supporting the plate discharging roll axis. Holding means disposed on the main body side of the stencil type stencil printing machine for detachably holding the master detachable cassette at a master detachable position, the plate supplying roll shaft attaching / detaching means, and the plate supplying roll shaft Plate feeding roll axis moving means for attaching and detaching the plate feeding roll shaft to and from the supporting means, plate discharging roll axis attaching and detaching means, and plate discharging roll axis moving means for attaching and detaching the plate discharging roll axis to and from the plate discharging roll shaft supporting means; A plate feeding roll axis moving driving unit that drives the plate feeding roll axis moving unit; and a plate discharging roll axis moving driving unit that drives the plate discharging roll axis moving unit. Stencil type plate-making printing device according to symptoms. 2. A master automatic attachment / detachment device for a stencil type stencil printing machine according to claim 1, wherein said plate discharge roll shaft is attached to said plate supply roll shaft attachment / detachment means, and said plate supply is attached to said plate ejection roll shaft attachment / detachment means. The roll shafts are respectively detachable. The plate feeding roll shaft moving unit and the plate discharging roll shaft moving unit are constituted by one roll shaft moving unit, and the roll shaft moving driving unit for driving the roll shaft moving unit is provided. A stencil type stencil printing machine characterized by having: 3. A stencil printing machine according to claim 1, wherein said holding means, said plate feeding roll axis moving means, said plate discharging roll axis moving means, said plate feeding roll axis moving driving means, and said plate discharging roll axis moving. A stencil-type stencil printing machine, wherein a driving means is disposed on a side of the printing drum in a longitudinal direction of the rotation center axis. 4. A stencil printing machine according to claim 2, wherein said holding means, said roll axis moving means, and said roll axis moving driving means are arranged laterally of said printing drum in a longitudinal direction of said rotation center axis. A stencil type stencil printing machine characterized by being arranged. 5. The cassette for attaching / detaching a master according to claim 1, 2, 3, or 4, wherein the plate supplying roll shaft attaching / detaching means has a plate feeding roll shaft guide smaller than an outer diameter of the plate supplying roll shaft. A groove and a plate-feeding roll shaft fixing portion for supporting the plate-feeding roll shaft in a non-rotatable manner in the plate-feeding roll shaft guide groove, wherein the plate discharging roll shaft attaching / detaching means is larger than the outer diameter of the plate discharging roll shaft. A cassette for attaching / detaching a master, wherein a small plate discharging roll shaft guide groove and a plate discharging roll shaft fixing portion for supporting the plate discharging roll shaft non-rotatably in the plate discharging roll shaft guide groove are provided. 6. A cassette for detaching and mounting a master according to claim 5, wherein a rotation transmitting member for transmitting a rotational driving force to said plate discharging roll shaft is detachably provided at one end of said plate discharging roll shaft. Cassette. 7. The master mounting / removing cassette according to claim 5, wherein the plate feeding roll shaft, the plate discharging roll shaft, and the master mounting / removing cassette are all made of a combustible material. Cassette. 8. The cassette for attaching and detaching a master according to claim 5 or 6, wherein said plate supplying roll shaft attaching and detaching means and said plate discharging roll axis attaching and detaching means are made of a material having a strength greater than a body of said master attaching and detaching cassette. A master detachable cassette, which is detachably connected to the main body. 9. The master detachable cassette according to claim 5, 6, 7 or 8, wherein a main body of the master detachable cassette has an opening / closing cover which can be opened / closed with the plate feeding roll and the plate discharging roll housed therein. When the master detachable cassette is used, it can be set on the holding means with the open / close cover opened, and it is possible to close the open / close cover after using the master detachable cassette. Characteristic cassette for detachable master. 10. The cassette for attaching and detaching a master according to claim 9, wherein after using the cassette for attaching and detaching the master, when the used plate discharging roll axis and the used plate feeding roll axis are reset to the main body, A master detachable cassette, wherein an automatic closing means for automatically closing the opening / closing cover is provided near an opening / closing portion of the opening / closing cover. 11. The cassette for attaching and detaching a master according to claim 9, wherein the open / close cover has a double-opening structure. 12. A stencil type stencil printing machine for attaching and detaching the master by using the cassette for attaching and detaching the master according to claim 11, wherein the cross section of the holding means has both open / close covers with the open / close cover opened. A stencil-type stencil printing machine characterized in that it has a substantially hat shape for holding.