JPS6361180B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a fully automatic plate-making printing system in which when a manuscript is inserted, plate-making is immediately performed on the printing base paper, and the resulting plate is automatically mounted on a printing screen and printing begins. It's about machines.

Structure of the conventional example and its problems In conventional fully automatic plate-making printing machines, most of the transfer of printing base paper to the plate-making device or printing device was carried out by rollers or belts. If the printing base paper is a sheet-fed type, the above method is sufficient, but it is not suitable for a fully automatic plate-making printing machine of the present invention that uses a long roll of printing base paper to automatically supply the printing base paper. In some cases, conveyance using rollers or belts as described above is not preferred. That is, when a long length of printing base paper is transported by a roller or belt, it may not be transported immediately due to the dimensional accuracy and installation accuracy of the roller or belt itself, but may be transported in a manner that makes a large turn from side to side. This sometimes caused the printing base paper to kink or wrinkle, making it difficult to perform plate making.

In addition, in order to attach the base paper after plate making to the screen of the printing cylinder, the screen is equipped with a clamp device, but since the base paper is extremely thin at around 30 μm, it is difficult to hold it with the clamp device, and it is difficult to clamp the base paper onto the screen. There were many cases where the device was not installed properly.

OBJECTS OF THE INVENTION The present invention is intended to compensate for the above-mentioned drawbacks of the prior art, and aims to ensure that printing base paper is attached to the screen.

Structure of the Invention The present invention includes a roller that transports a roll of base paper together with a document, a base paper cutter device that has a cutter that cuts the base paper into a predetermined length, a plate making device, and a plate separation device that separates the base paper and the document. a clamp device that clamps the base paper provided on the screen of the printing cylinder; and a plate feeding device that clamps the starting end of the base paper cut by the base paper cutter and transfers it to the base paper clamp; Consists of a clamp body that is pivotally supported via a shaft and has a clamping portion formed in the direction of paper transport with respect to the support shaft, and a spring that biases this clamp body in different directions at the dead center. The starting edge of the base paper cut by the cutter device is held by the plate feeding device and linearly transferred to the base paper clamp device via the plate making device and separation device. In other words, since the cut edges of the cut base paper are held and the rolled base paper is pulled out, there is no twisting or wrinkling of the base paper that occurs with conventional methods of transporting the base paper using rollers or belts. You can definitely pull it out. Further, the clamp in the clamping device acts in a tightening direction against the slippage of the base paper to ensure the clamping of the base paper, thereby ensuring that the base paper is securely attached to the screen.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 1 is a schematic diagram of a fully automatic plate-making printing machine, where 1 is a printing device that has the necessary mechanisms for printing such as a printing cylinder, a printing screen, and a paper feeder, and 2 is a feeder for printing paper to be supplied to the printing mechanism. 3 is a paper discharge section that receives the printed printing paper; 4 is a plate-making device that overlaps the printing base paper and the original to form a plate using a thermal plate-making method; and 5 is a plate-making device that sends the starting edge of the printing base paper to the plate feeding device, and also transports the original. A base paper cutter device having a roller that feeds the base paper onto the printing base paper and a cutter that cuts the base paper to a predetermined length; 6 is a document insertion section; 7 is a document discharge section; 8 is a unit that peels the printed base paper from the printing screen. A plate discharge device 9 performs plate discharge processing, and numeral 9 is a base paper roll formed by winding a heat-sensitive perforated printing base paper into a roll shape.

The above is the outline of the configuration, and next, the outline of the operation will be explained.

When the original is inserted into the original insertion section 6, a switch is turned on, and a plate feeding device (described later), which holds the starting edge of the original paper 9 on the side of the original paper cutter device 5, clamps the original paper and places it on the printing screen of the printing device. The base paper is transferred to a base paper clamp device (described later), and the starting end of the base paper is clamped by the base paper clamp device. At this time, the rollers of the base paper cutter device 5 rotate idly as the base paper is pulled out, and the document is sent to the plate-making device 4 together with the base paper, where plate-making is performed. When platemaking is performed, the printing screen is rotated and the base paper is attached to its outer periphery. In this process, when the base paper reaches a predetermined length, the cutter of the base paper cutter device 5 operates to cut the base paper. Printing begins when the stencil-made base paper is placed on the printing screen.

Although the outline of the operation has been explained above, the specific structure will be explained in further detail below.

In FIGS. 2 to 4, 10 is a pair of base paper rollers A, and 11 is a pair of base paper rollers B that are interlocked with this base paper roller A. The base paper rollers A, B10, and 11 are supported by one-way clutches in order to feed the base paper. 12 is a cutter for cutting the base paper into a predetermined length; 13 is a flash bulb such as a xenon bulb provided in the plate-making device 4; 14 is a lifting device for the flash mechanism including the flash bulb 13; 21 is a pressed glass; Glass with low optical loss, such as glass, is used. 15 is a pressure receiving material (plate making surface) made of an elastic body. Reference numeral 16 denotes a plate feeding device, which is slidably mounted on a longitudinal sliding shaft 16a provided between the paper cutter device 5 and the printing device 1.
Reference numeral 17 denotes a clamping device for base paper, and a printing screen 2 that is wound around two printing cylinders 19 of the printing device 1.
It is installed in 3. Reference numeral 18 denotes a base paper clamp opening/closing device having a cam for opening and closing the clamping device 17;
0 is a plate separation plate, and a plate separation roller 20 is used during plate separation.
Its leading end comes into contact with a, separates the original paper from the original, and discharges the original to the original discharge section 7.
22 is a manuscript. Note that FIG. 4 shows a state in which the printing plate feeding device 16 slides on the sliding shaft 16a and moves toward the base paper roller B, and the other parts are the same as FIG. 1.

In the above configuration, a pair of base paper rollers A1
0, cutter 12, pair of base paper rollers B11,
Pressure receiving material (plate making surface) 15, plate separation roller 20
a. The base paper clamps 17 are sequentially arranged substantially in a straight line.

Next, the plate feeding device 16 will be explained with reference to FIGS. 5 and 6. Reference numeral 26 denotes a main frame, which has guide portions 30 with built-in slide bearings etc. at both ends thereof, and this guide portion 30 is connected to the sliding shaft 16.
It is slidably attached to a. Reference numeral 25 denotes a base paper clamping plate, which is supported by a shaft 32 on the main frame 26, and a base paper clamping piece 27 made of an elastic material with a large frictional force is fixed to the base paper clamping portion. Note that this base paper clamping piece 27 is also provided at a clamping portion of the main frame 26 on the opposite side. A solenoid 24 acts to open the base paper clamping portion of the base paper clamping plate 25.
A spring 28 biases the clamping force of the base paper clamping portion to the base paper. 29 is a connecting plate that connects the base paper clamping plates 25. Further, 31 is a drive wire attachment part for sliding the plate feeding device 16 on the sliding shaft 16a.
A driving force transmitting member (not shown) such as a wire is attached to this portion.

Further, as shown in FIGS. 7 and 8, the clamping device 17
The structure of the following is described below. 33 is a support shaft 35 attached to the frame 34
The clamp body is pivoted via the clamp body, and a clamping part 37 is attached with a clamping piece 36 made of an elastic material on the rear side thereof, that is, on the downstream side in the paper transport direction with respect to the support shaft 35.
is installed protrudingly. 38 is the locking point 3 of the frame 34
9 and a locking point 40 formed closer to the clamping portion 37 than the support shaft 35 of the clamp body 33. This spring 38 connects the locking point 39 and the support shaft 3
When the locking point 40 is located above the line connecting 5, the clamp body 33 is biased clockwise, and when it is located below, the clamp body 33 is biased counterclockwise.

Next, its effect will be explained.

The state of the fully automatic plate making and printing machine before starting is shown in Figure 4. That is, the plate feeding device 16 is located close to the base paper feed roller B11, and its base paper holding plate 25 clamps both ends of the base paper 9 sent out by the base paper roller A10 and the base paper roller B11. . When the original 22 is inserted from the original insertion section 6, the edge of the original is moved by the original paper roller A10.
It comes into contact with the top of the document. When the switch is operated to start operation in this state, the plate feeding device 16 moves the sliding shaft 16 toward the printing device 1 while holding the base paper.
a and pulls the end of the base paper to the open clamp 17 (Fig. 2), and then the clamp opening/closing device 18 is activated to open the clamp device 17.
is closed, and the paper end of the base paper 9 is clamped between the clamping piece 36 of the clamp body 33 of this clamping device 17 and the screen 23. When this base paper 9 is sent from the base paper roller B11 section to the clamping device 17 section, the base paper roller A10 and the base paper roller B11 rotate following the feeding of the base paper 9, and
is sent to the plate-making device 4 together with the base paper 9 (FIG. 2).
As described above, when the base paper 9 is clamped by the base paper clamp device 17, the plate separation plate 20 moves to the position where it comes into contact with the plate separation roller 20a as shown by the dotted line in FIG. Prepare to separate the base paper 9 and the original 22 by lifting it into a curved shape. Next, the elevating device 14 of the flash mechanism section is activated, and the flash mechanism section rises to release the pressing glass 21 and the pressing receiving material 1.
5, the base paper 9 and the original 22 are pressed. When a sufficient pressing force is reached, the flash bulb 13 flashes and irradiates the document 22 with strong light through the base paper 9. The characters or images on the original document 22 that have received the light absorb the light and generate heat, thereby punching out the characters or images on the base paper 9 to produce a printing plate. When the flash ends, the elevating device 14 is activated, the flash mechanism is lowered, and the printing cylinder 19 begins to rotate slowly. The clamping device 17 that clamps the base paper 9 is attached to the screen 23 wound around the printing cylinder 19 as described above, so that the printing cylinder 1
By rotating 9, the base paper 9 is automatically moved to the screen 23.
It is rolled up and attached. Here, the length of the base paper 9 required for printing may be slightly shorter than the entire circumference of the screen 23, so the base paper 9 is
The required length of the base paper 9 is detected in the process of being rolled up, and the base paper cutter 12 cuts the base paper 9.

As described above, a printing plate with the characters and images of the manuscript perforated on the base paper 9 is created, which is cut to the length required for printing, and the base paper 9 is automatically placed on the screen 23.
is installed and printing begins.

When the above-described cutting of the base paper 9 is completed, the plate feeding device 16 slides in the direction of the base paper feed roller 11, opens the base paper holding plate 25, and inserts the end of the base paper 9.
Next, the base paper roller A10 and the base paper roller B11 rotate to insert the paper end of the base paper 9 into the opening of the base paper holding plate 25, and when this insertion is completed, the base paper holding plate 25
It closes and holds both ends of the base paper 9, waiting for the next document insertion and operation.

To further describe the operation of the clamp device 17, the clamping portion 37 of the clamp body 33 is in the upper position as shown in FIG. Rotate counterclockwise. The rotation by the clamp opening/closing device 18 is performed between the locking point 39 and the support shaft 35.
The clamp body 33 is rotated counterclockwise by the biasing force of the spring 38. By the way, clamp body 3
Since the clamping portion 37 of No. 3 protrudes downwardly in the paper transport direction with respect to the support shaft 35, when the clamped base paper tries to come off, a counterclockwise action is activated, and the clamping piece 36 is more firmly attached to the screen 23. Pressure contact. Therefore, no matter how thin the base paper is, it can be reliably attached to the screen 23.

Effects of the Invention The plate-making base paper used in the plate-making printing machine of the present invention, which produces printing plates by thermal plate-making, is extremely thin due to its nature. , a polyester film with a thickness of 3 μm and paper with a thickness of 20 to 30 μm are laminated together, and the total thickness is about 35 μm. When extremely thin base paper is sent to the plate-making department or printing screen by rotating rollers, problems may occur such as the rollers not being able to catch the base paper, or the rollers applying pressure or feeding unevenly to the width of the base paper. As a result, kinks and wrinkles occur in the base paper, resulting in frequent defects in which the plate making and the base paper device to the screen cannot be performed properly.

However, in the present invention, as described above, a base paper cutter device, a plate making surface of a plate making device, a plate separation device, and a base paper clamp device are arranged, and the edge of the base paper is held between the cutter device and the clamp device. Since the structure is equipped with a plate feeding device that moves linearly, the base paper is fed from a rolled base paper by pulling the edges of the paper, so the kinks and wrinkles described above do not occur and the base paper is stable. It is possible to perform plate making and attach the base paper to the screen. Furthermore, in the present invention, since the plate feeding device clamps and pulls both ends of the base paper, it also eliminates the difficulty of designing and manufacturing to avoid irregular partial clamping that tends to occur when the entire surface is clamped. be able to.

Furthermore, the clamping device ensures that the base paper is attached to the screen and enables printing without misalignment, which is extremely effective.

[Brief explanation of drawings]

FIG. 1 is a schematic side sectional view of the fully automatic plate making and printing apparatus of the present invention, and FIG. 2 is a side sectional view of the main part of FIG. 1, showing a state in which the plate feeding device has moved toward the paper clamp device. Figure 3 is a sectional view taken along line A-A' in Figure 2, Figure 4 is a side sectional view when the plate feeding device moves toward the base paper cutter device, and Figure 5 is a side view of the base paper holding part of the plate feeding device. Figure 6 is a plan view of the plate feeding device, Figures 7 and 8 are sectional views of the clamping device, and Figure 7 is a closed state.
FIG. 8 shows the open state. 4... Plate making device, 5... Base paper cutter device, 9
... Base paper roll, 10 ... Roller, 12 ... Base paper cutter, 16 ... Plate feeding device, 17 ... Clamp device, 19 ... Printing cylinder, 23 ... Printing screen, 33 ... Clamp body, 35 ... Support shaft, 37...
...Holding part, 38...spring.

Claims (1)

[Claims] 1. A roller that transports the rolled base paper together with the original, a base paper cutter device that has a cutter that cuts the base paper into a predetermined length, and a plate-making device;
a plate separation device that separates the base paper and the original; a base paper clamp device that is provided on the screen of the printing cylinder and clamps the separated base paper; and a base paper clamp device that clamps the starting end of the base paper cut by the base paper cutter device. The base paper clamping device includes a clamp body which is pivotally supported via a support shaft and has a clamping portion formed at the lower side in the direction of transport of the base paper with respect to the support shaft, and A fully automatic plate-making printing machine consisting of springs that bias this clamp in different directions.