JPH0132787B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fully automatic plate-making/printing machine that automatically performs plate-making and printing simply by inserting a document, and is particularly characterized by a plate-discharging mechanism.

Conventionally, printing machines that perform mimeograph printing by wrapping stencil paper around a printing cylinder have had to manually remove the used stencil paper from the printing cylinder after printing has been completed, which is extremely troublesome. In addition, there were many inconveniences such as the printing ink adhering to hands and clothes. As a means to mechanize this process, there is a known method in which a part of the stencil paper wrapped around the printing cylinder is raised up using a claw with an acute-angled tip, and the stencil is ejected using a feed roller. The paper is very thin, about 20 to 30 microns, and has a weak stiffness, and in printing machines that use rolled base paper, there is no reinforcing paper at the tip of the base paper to attach it to the printing cylinder, so it must be mechanically peeled off. However, there was a problem.

The present invention solves the above-mentioned drawbacks, and one embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an overall configuration diagram showing one embodiment of the present invention. 1 is a plate feeding mechanism that transports a roll of base paper and cuts it into a predetermined length; 2 is a plate feeding mechanism that presses the original and base paper with a predetermined pressure; A plate-making mechanism that performs heat-sensitive flash plate making using a flash discharge tube; 3 a plate feeding mechanism that attaches the stencil paper that has been made and cut to a predetermined length to a printing cylinder; and 4 that performs mimeograph printing using stencil paper fed to the printing cylinder. 5 is a printing mechanism that removes and processes the used base paper from the printing cylinder after printing; 6 is a paper feed mechanism that supplies printing paper to the printing mechanism 4 during printing; 7
is a paper ejection mechanism that ejects printed paper.

Further, 8 is a document insertion table, 9 is a document, 10 is a rolled base paper, 11 is a document discharge table, 12 is a paper feed table, 13
is printing paper, 14 is a paper output table, 15 is printed paper, 16 is a base paper cutter, 17 is printing ink, 1
8 is a paper feed cassette, and 19 is a printing cylinder.

Figures 2 to 6 show the plate ejecting mechanism 5 in Figure 1.
This is a detailed view showing one embodiment, and 20 is a screen stretched between the upper and lower printing cylinders 19, 21 is a base paper that has been subjected to thermal flash printing and is fed, and 22 is a plate feeding mechanism 3.
23 is a suction airflow conduit that guides the suction airflow of a suction fan (not shown) and is rotatable; 24 is a suction cup disposed in plurality on the suction airflow conduit 23; 25 is a pressure roller; 26 is a roller guide integrally formed with the suction airflow conduit 23;
27 is a roll paper tube for winding up the discharged master; 28 is the master discharge base paper wound on the roll paper tube 27; 29 is a suction hose that flexibly connects the suction airflow conduit 23 and a suction fan (not shown); 30 is the A conduit drive motor that reciprocates the suction airflow conduit 23 by a predetermined angle, 31 a paper tube drive motor that rotates the paper roll tube 27, and 32 a paper tube drive motor that is directly connected to the paper tube drive motor 31 and holds the paper roll tube 27. The tube holder A, 33 is a paper tube holder B that is rotatably held by the tension knob 34 and holds the rolled paper tube 27 together with the paper tube holder A32.

7 to 8 show an embodiment of a mechanism for applying and releasing a pressing force to the pressing roller 25, and 35 is a connecting portion 35a to the rotating shaft 25a of the pressing roller 25. The fastened press clamp arm, 36 is a press clamp lever, 37 is a clamp protrusion that forms a protrusion at the end of the press clamp arm 35 and engages with the press clamp lever 36, and 38 applies a pressing force to the press roller 25. A pressure spring 39 is a clamp spring that applies a clamping force when the pressure clamp arm 35 and the pressure clamp lever 36 are engaged; 40 is a pressure clamp arm 35;
This is a clamp release solenoid that operates to release the engagement of the pressing clamp lever 36.

In the above configuration, when the original 9 is inserted from the original insertion table 8 and the power is turned on, the plate feeding mechanism 1 is activated.
The original 9 and the rolled base paper 10 are superimposed and sent to the plate-making mechanism 2. The plate-making mechanism 2 is a mechanism that presses the polymer of the original 9 and the rolled base paper 10 with a predetermined pressure and makes a heat-sensitive flash plate using an electronic flash discharge tube. While the plate is being made, the plate is sent to the plate feeding mechanism 3 by the plate feeding mechanism 1. The rolled base paper 10 is
Further, after the document 9 passes through the base paper cutter 16, it is cut into a predetermined length by the base paper cutter 16. On the other hand, the polymer of the original 9 and the rolled base paper 10 fed to the plate feeding mechanism 3 is separated, the original 9 is sent to the original discharge table 11, and the rolled base paper 10 is transferred to the printing cylinder 1.
9 will be published. When plate feeding is completed, the printing mechanism 4 starts operating upon receiving a signal to start printing. At this time, the printing paper 13 set on the paper feed table 12 is sent to the printing mechanism 4 by the paper feed mechanism 6, and the printed paper 15 is sent out to the paper delivery table 14 by the paper discharge mechanism 7. In this manner, the fully automatic plate-making and printing mechanism operates. When printing is finished, the rolled base paper 10 is peeled off from the printing cylinder 19 by the plate discharge mechanism 5 and processed.

Here, the master discharge mechanism 5 will be explained in more detail with reference to FIGS. 2 to 8. FIG. 2 is a diagram after printing is completed and before the plate discharge mechanism 5 starts operating.
A base paper 21 is fed onto a screen 20 stretched over a printing cylinder 19, one end of which is connected to a base paper feed clamp 2.
2 is maintained. FIG. 3 shows the plate discharge mechanism 5 in operation, and when the printing cylinder 19 rotates by a predetermined angle and the base paper feed clamp 22 opens to release the hold on one end of the base paper 21, the conduit drive motor 3
0, the suction airflow conduit 23 rotates, and the suction cup 24
stops at a position facing the base paper 21. Then, the suction fan (not shown) is turned on, and the suction cup 24
Negative pressure is generated inside, and one end of the base paper 21 is attached to the suction cup 24.
is adsorbed to. FIG. 4 is a diagram before the plate discharge mechanism 5 finishes operating, and the suction airflow conduit 23 rotates in reverse while the suction cup 24 suctions one end of the base paper 21 and stops at a position above the roll paper tube 27. Then, the power to the suction fan is turned off, and the base paper 21 separates from the suction cup 24 and falls onto the discharged base paper 28. When the roll paper tube 27 starts to rotate by the paper tube drive motor 31, since ink is attached to the side of the base paper 21 facing the screen 20, the base paper 21 is adhered to the discharged base paper 28 due to the viscosity of the ink and is wound up. It will be done. When the winding of the base paper 21 onto the paper roll tube 27 is completed, the paper tube drive motor 31 is stopped, and the operation of the plate discharge mechanism 5 is completed. When the number of discharged master sheets 28 exceeds a predetermined number, the knob 34 of the paper tube holder B33 is pulled, and the paper sheets 28 are disposed of while being wound around the roll paper tube 27. Further, the replenishment of the paper roll tube 27 to the plate discharge mechanism 5 can be carried out by using a used empty paper tube for the rolled base paper 10.
In the plate discharge mechanism 5, the role of the pressure roller 25 is to apply a certain amount of tension to the base paper 21 when winding the base paper 21 onto the paper roll tube 27, and to apply pressure to prevent the base paper from becoming thick.

Adding an explanation of the operation of the pressure roller 25, when the suction airflow conduit 23 rotates from the state shown in FIG. 2 to the state shown in FIG. 3, the pressure roller 25 rotates under the action of the roller guide 26, as shown in FIG. , is locked in the position shown in FIG. This locking mechanism is shown in Figures 7 and 8.
To explain with a diagram, the rotation shaft 25a of the pressure roller 25
When the pressure roller 25 is in the position shown in FIG. 2, the pressure clamp arm 35 fastened to the
), the pressure roller 25 is pressed by the pressure spring 38.
is exerting pressure on the When the pressure roller 25 comes to the position shown in FIG.
), the clamp protrusion 37 engages with the pressing clamp lever 36 and is held by the clamping force of the clamp spring 39. The suction cup 24 that has sucked the base paper 21 in FIG. 3 rotates to the position shown in FIG. 4, but during this time the pressing roller 25 remains held at the position shown in FIG. This is to position the base paper 21 between the pressure roller 25 and the roll paper tube 27 so that the rotation locus of the suction cup 24 that has sucked the base paper 21 passes below the pressure roller 25. When the suction cup 24 comes to the position shown in Fig. 4, the clamp release solenoid 40 works against the clamping force of the clamp spring 39, and the pressing clamp lever 36 moves from the position C (Fig. 7) to the position D. and rotate. Then, due to the action of the pressing spring 38, the pressing clamp arm 35
returns from position B to position A and applies pressing force to the pressing roller 25.

As described above, according to the present invention, plate making and printing can be performed automatically just by inserting the original, and furthermore, the plate ejecting mechanism uses the suction force of the fan motor to remove the plate, so that the thickness of the plate can be reduced to 20 mm or more. It is extremely thin (about 30 microns) and weak, and in printing machines that use rolled base paper, it can be easily and reliably removed from base paper even if there is no reinforcing paper for attaching the printing cylinder to the leading edge of the base paper. Its industrial value is great, as it can be easily removed and removed without staining hands or clothes.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the overall configuration of a plate making/printing machine according to an embodiment of the present invention, Figs. 2 to 4 are explanatory diagrams of the operation of the plate ejection mechanism, and Fig. 5 is the pressing roller and roller guide. 6 is a sectional view taken along the line A-A' in FIG. 2, FIG. 7 is an explanatory diagram of the operation of the locking mechanism of the pressing roller, and FIG. 8 is a sectional view of the pressing clamp arm. be. 1... plate feeding mechanism, 2... plate making mechanism, 3... plate feeding mechanism,
4... Printing mechanism, 5... Discharging mechanism, 6... Paper feeding mechanism, 7
...Paper discharge mechanism, 23...Suction airflow conduit, 24...Suction cup.

Claims (1)

[Claims] 1. A plate feeding mechanism that transports rolled base paper, a plate making mechanism that uses flash discharge tubes, a plate feeding mechanism that attaches the plate-made base paper to the printing cylinder, a printing mechanism that performs mimeograph printing, and a process that processes used base paper. It includes a plate discharge mechanism, a paper feed mechanism that supplies printing paper, and a paper discharge mechanism that discharges the printed paper, and the plate discharge mechanism attracts and peels used base paper from the printing cylinder and winds it around a used paper tube. Plate making and printing machine configured.