JPH0671147U - Master plate for stencil printing - Google Patents

Abstract

(57) [Summary] [Object] To provide a stencil printing original plate capable of preventing a perforation defect from being caused by a foreign substance attached to a thermal head and a new printing surface from being contaminated during perforation. [Structure] A cleaning member 70 for cleaning foreign matter adhering to the heat generating portion of the thermal head 15 is provided on the rear lower surface in the insertion direction of the stencil printing plate 50A.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stencil printing plate.

[0002]

[Prior art]

 Conventionally, as an original plate for stencil printing used in a stencil printing apparatus, there is one disclosed in the specification and drawings attached to the application of Japanese Utility Model Application No. 4-1455, for example, which is shown in FIGS. FIG. 6 is an exploded perspective view of the stencil printing plate, and FIG. 7 is a sectional view of the same.

The stencil printing plate 140 is roughly divided into a heat sensitive film 141, an ink impregnated body 142 impregnated with ink, a frame body 144 having an opening surrounding the ink impregnated body 142, and an ink impermeable body. The frame body 144 and the heat-sensitive film 141 and the film 143 are bonded to each other with adhesive layers 145 and 146, respectively.

As shown in FIG. 9, the stencil printing plate 140 configured as described above includes a thermal head 148, a platen 147 provided to face the thermal head 148, a pair of driving rollers 150, and a driven member. Plate-making is performed by a plate-making device including a roller 151.

The stencil printing plate 140 is set so that the heat sensitive film 141 and the thermal head 148 face each other, and the ink impregnated body 142 having a certain elasticity is deformed by the pressing force of the thermal head 148, and the thermal head The heat generating portion of 148 and the printing surface are in close contact with each other. Further, in the stencil printing plate 140, rail portions 149 provided at both ends of the frame body 144 are pressed by the driving roller 150 and the driven roller 151 with a predetermined pressure.

The operation will be described with reference to FIGS. 9 and 10. The thermal head 148, the platen 147, the driving roller 150, and the stencil printing plate 140 pressed by the driven roller 151 control the thermal head 148. Meanwhile, the drive roller 150 is rotated in the direction of arrow A to be conveyed in the direction of arrow B, and at the same time, a desired image is punched on the surface of the heat-sensitive film 141.

The stencil printing plate 140 on which a desired image is punched is attached to the stamp part 160 by sticking the back surface of the film 143 to the adhesive layer 163 of the stamp part 160, as shown in FIG. By gripping the handle 161 and pressing the printing surface of the stencil printing plate 140 against the printing paper 164, the ink impregnated in the ink impregnation body 140 oozes out from the perforated portion of the heat-sensitive film 141 and is transferred to the printing paper 164. , Can be stamped. An elastic body 162 is provided between the handle 161 and the stencil printing plate 140 to prevent the pressing force from becoming non-uniform during printing.

[0008]

[Problems to be solved by the device]

 However, in the above-mentioned stencil printing machine, the thermal head was pressed against the printing surface of the stencil printing plate at the time of punching, and the elasticity of the ink impregnated body was used to bring the heat generating part of the thermal head into close contact with the printing surface. In the deformed state of the ink impregnated body, the stencil printing master plate is sequentially conveyed while controlling the thermal head, so that the ink impregnated body is punched while being squeezed. At this time, the ink may flow out from the ink impregnated body, may further flow out from the perforated printing surface, and the ink may adhere to the surface of the thermal head.

Further, the heat-sensitive film of the stencil sheet is fused to the heat-generating portion of the thermal head during perforation, which may cause foreign matter to adhere to the surface of the head.

When a new stencil printing plate is punched or printing is performed on thermal paper in the presence of deposits such as ink on the surface of the thermal head, heat will not be transmitted properly by the deposits and there will be defective punching. There is a risk that the ink will be generated or the ink will be transferred to stain the new printing surface.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to prevent a perforation defect from being caused by a foreign substance adhering to the thermal head and a new stamp surface from being contaminated during perforation. The purpose is to provide a printing plate.

[0012]

[Means for Solving the Problems]

 To achieve this object, the stencil printing plate of the present invention comprises a heat-sensitive stencil sheet obtained by adhering a thermoplastic film and a multi-pore support, and a heat-sensitive stencil sheet on the side of the porous support. And an ink impregnated body that is impregnated with ink, and is provided with a cleaning means for cleaning the thermal head.

Further, the cleaning means may be provided at a position behind the ink impregnated body in the plate making direction.

[0014]

[Action]

 The stencil printing plate of the present invention having the above-mentioned structure is made by punching the heat-sensitive stencil sheet by the punching means. Then, the cleaning means cleans the thermal head of the perforation means to remove foreign matter adhering to the thermal head.

[0015]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the stamp device of the present embodiment to which the stencil printing plate of the present invention is applied comprises a plate making device 1 and a stamp block 60 housed in the plate making device 1. ing. An operation unit 1a is formed on the upper surface of the plate making apparatus 1, and a keyboard 2 on which characters and the like are displayed, a liquid crystal display 3, a plate making key 4, and an on / off switch 5 are provided on the operation unit 1a. An insertion opening 6 is formed in the side surface 1b of the plate making apparatus 1, and the master plate 50A for stencil printing is inserted into the conveyance path in the plate making apparatus 1 through the insertion opening 6.

The stencil printing plate 50A has a frame body 61 as shown in FIG. 4, and a pair of rails 62 are formed on the left and right sides of the frame body 61 (only one rail is shown in the figure. Exist). An ink impregnated body 73 impregnated with ink is held on the lower surface of the frame 61, and the lower surface of the ink impregnated body 73 is formed by adhering a heat-sensitive film made of PET and a porous support made of Japanese paper. It is covered with the heat-sensitive stencil sheet 74.

As shown in FIG. 6, the heat generating portion of the thermal head 15 is provided on the rear lower surface with respect to the insertion direction of the stencil printing plate 50 A and at a position adjacent to the opening of the frame 61 having the ink impregnated body 73. A cleaning member 70 for cleaning the adhered foreign matter is provided (the arrow indicates the insertion direction). The material of the cleaning member 70 is preferably a flexible material such as a non-woven fabric formed of polypropylene that has good adhesion to the heat generating portion of the thermal head 15 and does not scratch the heat generating portion.

The stencil printing plate 50A is attached to the lower surface of the stamp block 60 as described later, after the heat-sensitive stencil sheet 74 is heated and perforated by the heat treatment in the plate making apparatus 1.

The stamp block 60 has a support plate 65, and a grip 64 is fixed to the center of the support plate 65 (FIG. 2). The adhesive 63 is attached to the support plate 65 via a cushion layer 162. The stamp block 60 is stored in the stamp storage section 7.

A roof-shaped protection portion 58 is formed so as to project from the insertion opening 6 on the side surface 1b of the casing of the plate making apparatus 1. The lower part of the roof-shaped protection part 58 is opened, and the stencil printing plate 50A is supplied from the introduction port 58a at the tip of the protection part 58 through the insertion port 6 into the conveyance path in the plate making apparatus 1.

In FIG. 2, an upper conveyance guide plate 11 a is provided so as to pass above the insertion opening 6. A lower conveyance guide plate 11b is provided in the plate making apparatus 1 so as to face the upper conveyance guide plate 11a, and the interval between the upper and lower conveyance guide plates 11a and 11b is set to be wider than the thickness of the stencil printing plate 50A. .

A platen 12 is provided on the left side of the upper transport guide plate 11a in the figure, and an upper transport roller 13a forming one of a pair of transport rollers is provided on the left side of the platen 12. As shown in FIG. 4, the platen 12 contacts the central portion of the frame body 61, and the upper transport roller 13a contacts the surfaces of the left and right rails 62 of the frame body 61 and transports the stencil printing plate 50A. Below the lower conveyance guide plate 11b, a thermal head holding plate 16 holding a thermal head 15 is provided swingably around a shaft 17. The thermal head holding plate 16 is urged in the clockwise direction in FIG. 2 by a tension spring 18, and the thermal head holding plate 16 is operated by a cam mechanism (not shown), so that the stencil printing plate 50A in which the thermal head 15 is inserted is moved. It swings between a punching position in contact with the heat-sensitive stencil sheet 74 and a standby position shown in FIG. As shown in FIG. 3, on the left side of the thermal head holding plate 16, a transport roller holding plate 19 that interlocks with the thermal head holding plate 16 via a connecting wire 14 is provided so as to be capable of seesaw movement about a shaft 21. . As shown in FIG. 3, the upper end of the connecting wire 14 engages with the shaft 180 of the lower carrying roller 13b, and the lower carrying roller 13b corresponds to the upper and lower two carrying rollers 13a at the other end of the carrying roller holding plate 19. It is held so that it can rotate freely. A discharge roller 23 is provided on the opposite side of the shaft 21 from the lower transport roller 13b via a shaft 23a. A tension spring 24 is provided at the lower end of the transport roller holding plate 19, and the tension spring 24 biases the transport roller holding plate 19 in the counterclockwise direction in FIG.

On the other hand, an operating pin 22 is provided in the vicinity of the shaft 21, and the operating pin 22 is abutting surface 25a of the neck portion of the stop frame 80 rotatably supported by the shaft 26 and extending in the substantially vertical direction. Collaborate with. The upper end of the stop frame 80 is urged upward by a tension spring 27, and the tension spring 27 urges the stop frame 80 about the shaft 26 in the counterclockwise direction in FIG. A stop plate portion 25b extending substantially vertically is formed at the right end of the stop frame 80 in the figure, and a stop plate 25c is provided at the center of the stop frame 80. The contact plate 25c is in contact with the upper guide plate 90 from below in FIG. 2 and biases the rotation of the stop frame 80. Further, a lower guide plate 91 is provided at a position facing the upper guide plate 90 so as not to interfere with the movement of the discharge roller 23. Next, the operation of the stamp device of the present embodiment configured as described above will be described.

The stencil printing plate 50A is supplied into the transport path in the plate making apparatus 1 through the introduction port 58a of the protection unit 58 and the insertion port 6 before the start of the punching operation. The state at this time is the state shown in FIG. 2, and the insertion end of the stencil printing plate 50A is in contact with the stop plate portion 25b of the stop frame and stopped.

When the plate making key 4 is pressed in the state shown in FIG. 2, the thermal head holding plate 16 swings clockwise around the shaft 17 by a cam mechanism (not shown), and a predetermined pressure is applied to the stamp surface of the stencil printing plate 50A. Pressed with. Further, as the thermal head swings, the lower transport roller 13b comes into contact with the lower surface of the rail 62 of the stencil printing plate 50A, and the transport rollers 13a and 13b complete the preparation for transporting the stencil printing plate 50A. Similarly, as the thermal head holding plate 16 swings upward and the transport roller holding plate 19 rotates counterclockwise in the figure, the operating pin 22 also swings counterclockwise, so the stop frame 80 Swings clockwise in the figure to open the transport path.

In this state, the transport of the stencil printing plate 50A is started and the punching operation is started.

The operation when the thermal head is pressed against the printing surface of the stencil printing plate 50A and punched will be described in detail with reference to FIG.

From the state shown in FIG. 5A, when the thermal head 15 is pressed against the printing surface of the stencil printing plate 50A, the ink impregnated body 73, which is an elastic body, is deformed by a predetermined amount, and the thermal sensitivity on the printing surface side is increased. The glaze 72 including the heat generating portion can be closely attached to the stencil sheet 74 (FIG. 5B).

At the time of punching, the conveying roller 13a is rotated by a driving source (not shown), the stencil printing plate 50A is conveyed leftward in FIG. 5, and at the same time, the thermal head 15 is driven and controlled by a driving source (not shown). As a result, a desired perforated image is formed on the surface of the heat-sensitive stencil sheet 74. At this time, since the ink impregnated body 73 of the stencil printing plate 50A is always deformed by a predetermined amount, the ink impregnated immediately after perforation causes the perforated portion of the heat-sensitive stencil sheet 74 to penetrate from the ink impregnated body 73. Since it passes and flows out, a small amount of ink may adhere to the glaze 72 of the thermal head 15 and the heat generating portion. Further, there is a possibility that various kinds of foreign matters may adhere to the thermal head, such that the heat-sensitive film of the heat-sensitive stencil sheet 74 melted by the heat generation of the thermal head 15 at the time of punching adheres to the heating element of the thermal head 15.

Until the control of the thermal head 15 is finished and the punching operation is finished, the stencil printing plate 50A contacts the cleaning member 70 provided behind the stencil printing plate 50A with the glaze 72 of the thermal head 15. The foreign matter that has been conveyed and adhered to the heating element of the thermal head 15 is cleaned by the cleaning member 70 (FIG. 5C). Since the surface of the thermal head 15 is cleaned, when a new stencil printing plate or thermal paper is punched or printed, the foreign matter adhering to the thermal head 15 at the time of the previous punching operation is used for the newly inserted stencil printing. It is not transferred to the printing surface of the original plate or thermal paper, and the printing surface is not soiled, and perforations and printing defects do not occur due to foreign matter adhering to the surface of the heating element.

When the punching operation is completed, the discharge roller 23 sends the stencil printing plate 50 A into the stamp housing 7. The sent stencil printing plate 50A is attached to the adhesive 63 of the stamp block 60, and the stamp block 60 is taken out of the stamp housing 7 while holding the stencil printing plate 50A. Then, by holding the grip 64 and pressing the printing surface of the stencil printing plate 50A against the paper, the ink of the ink impregnation body 73 seeps out from the perforated portion of the heat-sensitive stencil paper 74 and is transferred to the paper.

As is apparent from the above description, in the stencil printing plate 50A of the present embodiment, the thermal head 15 is cleaned by the cleaning member 70 to remove the foreign matter adhering to the thermal head 15. It is possible to prevent the foreign matter adhering to 15 from causing a defective drilling and soiling a new stamp face during drilling.

The present invention is not limited to the embodiments described in detail above, and modifications can be made without departing from the spirit of the invention.

[0035]

[Effect of device]

 As is clear from the above description, in the stencil printing plate of the present invention, the cleaning head cleans the thermal head of the perforation means to remove the foreign matter adhering to the thermal head. As a result, it is possible to prevent the occurrence of defective drilling and to prevent the new stamp surface from becoming dirty during drilling.

[Brief description of drawings]

FIG. 1 is a perspective view of a stamp device according to an embodiment.

FIG. 2 is a sectional view of the same.

FIG. 3 is a perspective view of internal main components of the plate making apparatus.

FIG. 4 is a perspective view of an engagement state of a platen, a conveyance roller, and a stencil printing plate.

5 (a) to 5 (c) are explanatory views successively showing a perforated state of a stencil printing plate.

FIG. 6 is an enlarged perspective view showing the vicinity of a cleaning member.

FIG. 7 is an exploded perspective view of a conventional stencil printing plate.

FIG. 8 is a sectional view of a conventional stencil printing plate.

FIG. 9 is a perspective view of a conventional stencil printing plate at the time of punching.

FIG. 10 is a cross-sectional view showing a punched state of a conventional stencil printing plate.

FIG. 11 is an explanatory diagram showing a marking state of a conventional stencil printing plate.

[Explanation of symbols]

 50A stencil printing plate 74 heat-sensitive stencil sheet 61 frame 73 ink impregnation body 15 thermal head 70 cleaning member

Claims (2)

[Scope of utility model registration request] 1. A heat-sensitive stencil sheet obtained by adhering a thermoplastic film and a porous support, and an ink impregnated body which is arranged on the porous support side of the heat-sensitive stencil sheet and impregnated with ink. Then, in the stencil printing original plate punched by the punching means provided with a thermal head, the stencil printing original plate is provided with a cleaning means for cleaning the thermal head. 2. The stencil printing plate according to claim 1, wherein the cleaning means is provided at a position rearward of the ink impregnated body in the plate making direction.