JPH0432751B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a press-type plate-making and printing apparatus, and particularly to a plate-making and printing apparatus that performs press-type heat-sensitive plate making and stencil printing using a heat-sensitive printing original plate. Related.

Background of the Invention A plate-making printing device that performs thermal perforation plate making of a stencil printing original plate using a heat-sensitive sheet and stencil printing using this stencil printing original plate in a pressing manner is a practical application filed by the same applicant as the present applicant. No. 114253 (Sho 57)
-15814), and this plate making printing apparatus includes a base having a pressure receiving surface, a pressing position where the pressing surface is pressed against the pressure receiving surface, and a position where the pressing surface is separated from the pressure receiving surface. A pressing plate rotatable with respect to the base between the open position and the open position, the pressure receiving surface portion being constituted by a cushion plate such as urethane foam, and the pressing surface portion being constituted by a light transmitting plate such as a transparent glass plate. ing.

In the above-mentioned type of plate-making printing apparatus, plate-making is performed by sandwiching a polymer of a printing original plate having a heat-sensitive stencil paper and a manuscript sheet between the cushion plate and the light-transmitting plate, and pressing the press plate. Printing is carried out thermally by irradiating the polymer with a light beam that has passed through the light transmitting plate while pressing the two together by rotating the base, and printing is performed by pressing the pressing plate against the base. Pressing is performed by pressing the printing original plate attached to the surface against the printing paper placed on the pressure-receiving surface of the base by rotating the press plate with respect to the base.

In the above-mentioned type of press-type printing device,
Thermal plate making and stencil printing are performed at the same position on the base, and therefore the light transmitting plate or cushion plate may be stained by printing ink during printing, and if these are stained, , it may have an adverse effect on thermal plate making, and good thermal plate making may not be possible.

Generally, thermal platemaking requires a relatively large pressing force several times that of stencil printing, and for this reason, in the above-mentioned rotary pressing type platemaking and printing apparatus,
In order to obtain a large pressing force during plate-making, the plate-making printing position is preferably set as close as possible to the axis of rotation of the press plate relative to the base. However, if the stencil printing position is determined as described above, stencil printing may be performed with an excessive pressing force during stencil printing, and a good quality stencil printed matter may not be obtained. Furthermore, when the plate-making printing position is determined as described above, since the plate-making printing position is located near the connecting portion between the base and the pressing plate, it is difficult to set the printing paper for the plate-making printing position. Become.

Purpose of the Invention The present invention is particularly advantageous in that there is no risk of the light transmitting plate being stained by printing ink during printing, and it is easy to apply a relatively large pressing force during thermal plate making and a moderate pressing force that is not so large during stencil printing. It is an object of the present invention to provide a rotary press type plate making printing device which is improved so that printing paper can be easily set.

Structure of the Invention According to the present invention, the present invention provides a base having a pressure receiving surface, a pressing position having a pressing surface where the pressing surface is pressed against the pressure receiving surface, and a position where the pressing surface is separated from the pressure receiving surface. a pressing plate rotatable with respect to the base between the opened position and the open position, and a part of either the pressure receiving surface part or the pressing surface part is a plate-making surface part made of a light transmitting plate, and the other part is is configured on the printing surface part, and a cushion member is movably attached to the other side between a position corresponding to the printing surface part and a position corresponding to the printing surface part. It will be achieved.

Effects of the Invention According to the above-described configuration, thermal plate making and stencil printing are performed at different positions, thereby making it possible for printing ink to adhere to the light transmitting plate used during thermal plate making during the stencil printing process. The printing ink staining of the light transmitting plate is avoided, and the deterioration of thermal platemaking performance due to this staining is eliminated.

The plate-making surface portion may be set closer to the rotation axis of the press plate relative to the base than the printing surface portion. As a result, thermal plate making is performed at a position close to the axis of rotation of the press plate with respect to the base, and during plate making, a large pressing force can be obtained relatively easily by rotating the press plate; The stencil printing is performed at a position far from the axis of rotation of the pressing plate with respect to the base, and the rotation of the pressing plate produces a good stencil printing with an appropriate pressing force without becoming excessive. Printing will begin. In addition, since stencil printing is performed at a so-called front position, which is far away from the connecting portion between the pressure plate and the base, printing paper can be easily and quickly set at the stencil printing position. .

DESCRIPTION OF EMBODIMENTS The invention will now be described in detail by way of embodiments with reference to the accompanying drawings.

FIGS. 1 to 3 show one embodiment of a pressure plate making and printing apparatus according to the present invention. In these figures, reference numeral 1 indicates a box-shaped base, which has a flat pressure-receiving surface portion 2 at the top, half of which is made of a transparent glass plate that transmits light. The remaining half is provided from the upper wall of the base 1 and is configured as a printing paper mounting table 4.
The light transmitting plate 3 is provided closer to the pivot shaft 7 of the pressing plate 8 than the printing paper mounting table 4 is. Printing stand 4
The grooves are wide so that the printing paper can be easily positioned.

Inside the base 1 is a light source device 5 such as a xenon discharge tube.
A reflecting mirror 6 and a power supply device (not shown) for the light source device 5 are provided, and the light source device 5 emits light by being supplied with electric power from the power supply device,
The light beam is emitted toward the light transmitting plate 3.

The base 1 rotatably supports one end edge of the press plate 8 by means of a pivot 7. The press plate 8 has a pad plate 10 constituting the press surface 9 on the side corresponding to the pressure receiving surface 2 , which is pivoted by a support shaft 11 parallel to the pivot 7 , and is at a pressing position where the press surface 9 is pressed against the pressure receiving surface 2 . and an open position in which the pressing surface section 9 is separated from the pressure receiving surface section 2, so that it can rotate relative to the base 1 around the pivot shaft 7.

As clearly shown in FIG. 4, the pad plate 10 has a relatively hard plate-making cushion plate 12 and a relatively soft printing cushion plate 13 on both sides, respectively.
and an original support element 1 for supporting a printing original, which is not shown on the printing cushion plate 13.
4 is installed. As shown in FIGS. 1 and 2, the pad plate 10 has a plate-making rotation position in which the plate-making cushion member 12 is exposed to the outside and corresponds to the light-transmitting plate 13, and a third plate-making rotation position.
As shown in the figure, it can be selectively positioned at a printing rotation position that is substantially 180° rotationally displaced relative to the press plate 8 around the support shaft 11 from the platemaking rotation position, In the printing rotation position, the printing cushion plate 13 is exposed to the outside and the cushion 1
3 corresponds to a printing paper mounting table 4. The pad plate 10 is rotated by a handle 15 attached to the pad plate 10. The pad plate 10 is magnetically attracted to a permanent magnet 16 attached to the press plate 8 in the plate-making rotation position, and is stably held in the rotation position, and in the printing rotation position, the pad plate 10 is stably held in the rotation position. is magnetically attracted to a permanent magnet 17 provided on the pressing plate 8, so that it is stably held in its rotational position.

When performing plate-making, as shown in FIGS. 1 and 2, the pad plate 10 is positioned at the plate-making rotating position so that the plate-making cushion plate 12 is exposed to the outside, and the pad plate 10 is placed on the light transmitting plate 3. Place the original printing plate on the plate, place the original sheet on top of it with the print image side facing downward, and then hold the press plate 8 by the handle 8a of the press plate 8 as shown in FIG. The plate-making cushion plate 12 is rotated from the open position shown in FIG. 2 to the pressed position shown in FIG. When this pressing force reaches a predetermined value and this is detected by a pressing force detection device (not shown) provided in the base 1,
The light source device emits light and the printing original plate is irradiated with light, thereby performing thermal perforation plate making.
Incidentally, this pressing force detecting device may be a pressing force detecting device having a structure as proposed in Japanese Patent Application No. 1983 filed by the same applicant as the present applicant.

The above-mentioned plate making is performed at a position close to the axis of rotation of the press plate 8 with respect to the base 1, that is, at a position close to the fulcrum of the press plate 8, so that a large pressing force can be obtained relatively easily. Excellent pressure-type thermal platemaking is performed under the . During plate making, the original plate supporting element 14 is hidden between the pad plate 10 and the pressing plate 8, and the pressing for plate making is performed by the cushion plate 12, which is not provided with obstacles such as the original plate supporting element 14. This pressure is applied to the original support element 1.
4. It is performed well without being hindered by obstacles such as No. 4. Further, since the plate-making cushion member 12 is made of a relatively hard elastic material, thermal plate making which requires a larger pressing force than during printing, particularly thermal plate making having a solid image area, can be performed satisfactorily.

When printing, as shown in FIG. 3, the pad plate 10 is rotated substantially 180° around the support shaft 11 from the platemaking rotation position so that the printing cushion plate 13 is exposed to the outside. The printing original is rotated, that is, the front and back are reversed, and positioned at the printing rotation position, and the printing original is inserted into the groove of the original support element 14 to attach the printing original to the pad plate 10. Place the printing paper on top, then grasp the handle 8a of the press plate 8 and rotate the press plate 8 from the open position to the press position to place the printing cushion plate 13 together with the original printing plate on the printing paper. Stand 4
Press it towards. As a result, press-type stencil printing is performed.

This stencil printing is performed at a position far away from the axis of rotation of the pressing plate 8 relative to the base 1, that is, near the point of force of the pressing plate 8, so that an excessive pressing force is not generated and an appropriate pressing Good stencil printing is performed with pressure. Since stencil printing is performed on the printing paper mounting table 4, which is separate from the installation position of the light transmitting plate 3, the possibility that the light transmitting plate 3 will be soiled by printing ink during the printing process is significantly reduced. Light transmitting plate 3
Contamination by printing ink is avoided. Further, in this case, since stencil printing is performed using the printing cushion plate 13, the stencil cushion plate 12 is not stained by printing ink either.

Since the printing cushion plate 13 is made of a relatively soft elastic material, stencil printing is performed without requiring a very large pressing force, and the printing ink loaded on the stencil printing original plate is difficult to spread. As a result, the printing ink can be used effectively for stencil printing, and a large number of sheets can be printed with one filling of printing ink.
In addition, in the case of multicolor printing, printing inks of different colors are less likely to mix with each other in the original printing plate.

The original printing plate used in the plate-making and printing apparatus according to the present invention was manufactured by the same applicant as the present applicant.
As proposed in No. 50-51306 (Utility Model Application Publication No. 51-132007), a frame-like frame made of cardboard and a heat-sensitive stencil printed on one side of the frame are proposed. It consists of a base paper and an ink impermeable ink cover sheet that is attached to the other side of the frame in an openable and closable manner, and the stencil printing base paper and the ink cover sheet are connected inside the frame. It may be configured such that relatively hard printing ink can be stored therebetween.

FIG. 5 shows another embodiment of the press-type plate making and printing apparatus according to the present invention. In FIG. 5, parts corresponding to those in FIG. 1 are designated by the same reference numerals as in FIG. In this embodiment, a pad plate 18 is slidably attached to the pressing plate 8 between a position corresponding to the light transmitting plate 3 and a position corresponding to the printing paper mounting table 4, and the pad plate 18 is slidably attached to the press plate 8. A cushion plate 19 is attached which serves both as a plate-making cushion plate and a printing cushion plate. Further, an original support member 20 for supporting the printing original in cooperation with the cushion plate 19 is attached to the pressing plate 8 at a position corresponding to the printing paper mounting table 4. The original supporting member 20 is made of a flexible material such as rubber or a rubber-like material so as not to collide with the base 1 during plate making and impede the plate making operation.

In this embodiment as well, the thermal plate making and stencil printing are performed at different positions as in the above-mentioned embodiment, so that the same effects as in the above-mentioned embodiment can be obtained.

Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited to these, and it is understood that various embodiments can be made within the scope of the present invention. It will be clear to those skilled in the art.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the press-type plate-making and printing apparatus according to the present invention, and FIG. 2 is a side view, partially in section, showing the state of the press-type plate-making and printing apparatus according to the present invention during plate-making work. FIG. 3 is a partially sectional side view showing the state of the press-type plate-making and printing apparatus according to the present invention during stencil work, and FIG. 4 is a side view showing the press-type plate-making and printing apparatus according to the present invention shown in FIGS. 1 to 3. FIG. 5 is a perspective view showing a pad plate used in the apparatus, and FIG. 5 is a perspective view showing another embodiment of the press-type prepress printing apparatus according to the present invention. DESCRIPTION OF SYMBOLS 1... Base, 2... Pressure receiving surface part, 3... Light transmission plate, 4... Print paper mounting stand, 5... Light source device, 6
...Reflector, 7...Pivot, 8...Press plate, 9...
Pressing surface portion, 10... pad plate, 11... support shaft,
12...Cushion member for plate making, 13...Cushion member for printing, 14...Original support element, 15...
...Handle, 16, 17...Permanent magnet, 18...Pad plate, 19...Cushion plate, 20...Original support member.

Claims (1)

[Scope of Claims] 1. A base having a pressure-receiving surface, and a base having a pressure-receiving surface between a pressing position where the pressing surface is pressed against the pressure-receiving surface and an open position where the pressing surface is separated from the pressure-receiving surface. a press plate that is rotatable with respect to the base, a portion of either the pressure receiving surface portion or the pressing surface portion is configured as a plate-making surface portion made of a light transmitting plate, and the other portion is configured as a printing surface portion; On the other hand, there is a press-type plate-making and printing device in which a cushion member is movably attached between a position corresponding to the plate-making surface portion and a position corresponding to the printing surface portion. 2. In the press-type plate-making and printing apparatus according to claim 1, the plate-making surface portion is provided closer to the rotation axis of the press plate relative to the base than the printing surface portion. A press-type plate-making printing device featuring: