JPS6255994B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention automatically performs plate making and printing just by inserting a manuscript.
This invention relates to a fully automatic plate making/printing machine that performs printing, and is particularly characterized by an automatic plate ejection mechanism.

Conventionally, with printing machines that perform mimeograph printing by wrapping stencil paper around a printing cylinder, once printing is completed, the operator has to manually peel off the used stencil paper from the printing cylinder and dispose of it, which is very troublesome. and
In addition, the printing ink has the disadvantage that it adheres to hands and clothes and stains them.

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 used base paper from the printing cylinder after printing and processes it; 6 is a paper feed mechanism that supplies printing paper to the printing mechanism 4 during printing; 7 is a paper discharge mechanism that discharges the printed paper. It is a mechanism.

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 discharge base paper wound up 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), and 30 is a suction airflow conduit 2
3 is a paper tube drive motor that rotates the paper roll tube 27 in a predetermined angle; 32 is a paper tube holder A that is directly connected to the paper tube drive motor 31 and holds the paper roll tube 27; A paper tube holder B 33 is rotatably held by a tension knob 34 and holds the rolled paper tube 27 together with the paper tube holder A.

Figure 7 is a normal fan motor connection diagram.
36 is an AC power supply, 36 is a power switch, 37 is an armature of the fan motor, and 38 and 39 are field coils of the fan motor.

FIG. 8 is a wiring diagram of a fan motor showing an embodiment of the present invention, where 40 is an AC power supply, 41 is a power switch, 42 is an armature of the fan motor, 43 and 44 are field coils of the fan motor, and 45 is a power switch. Relay coil, 46, 47 are relay normally open contacts, 48, 49
is the normally closed contact of the relay.

FIG. 9 is a wiring diagram of a fan motor showing another embodiment of the present invention, 50 is an AC power supply, 51 is a power supply switch, 52 is an armature of the fan motor, 53, 54
is the field coil of the fan motor, 55 is the relay coil, 56, 57 are the normally open contacts of the relay, 58, 59
is the normally closed contact of the relay.

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
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,
Original 9 and rolled base paper 1 sent to plate feeding mechanism 3
The 0 polymer is separated, the original 9 is sent to the original discharge table 11, and the rolled base paper 10 is fed to the printing cylinder 19. 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 tray 12 is transferred to the paper feed mechanism 6.
The printed paper 1 is sent to the printing mechanism 4 by
5 is delivered to the paper ejection table 14 by the paper ejection mechanism 7. This is how a fully automatic plate making/printing machine 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 6. 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, and one end of the base paper 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 its operation, 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 begins 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 roll paper 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 base papers 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 paper roll tube 27 can be replenished into the plate discharge mechanism 5 by using a used empty paper tube for the rolled base paper 10.
The role of the pressure roller 25 in the plate discharge mechanism 5 is to apply a certain amount of tension to the base paper 21 when the base paper 21 is wound onto the paper roll tube 27, and to apply pressure to prevent the base paper from becoming thick.

Now, focusing on the suction force of the suction cup 24, as shown in FIG. Armature 3
7 begins to rotate, and negative pressure is generated within the suction cup 24. Next, when the power switch 36 is turned off (opened), no excitation current flows, but the armature 37 does not suddenly stop due to its own inertia force, but gradually reduces its rotational speed. Therefore, the negative pressure inside the suction cup 24 also gradually disappears. If this method of controlling the fan motor using wiring is adopted for the plate ejecting mechanism 5, the suction cup 24 will come to the position shown in Fig. 4, and even if the power to the fan motor is turned off, the residual negative pressure inside the suction cup 24 will cause Base paper 2
1 is inconvenient because it remains attracted to the suction cup 24 for a while and it takes time for it to fall onto the discharged master paper 28. As a method for improving this inconvenience, a means for suddenly stopping the fan motor using an electric control means, particularly a regenerative braking means is shown in FIGS. 8 and 9.

In FIG. 8, when the power switch 41 is turned on, current flows through the relay coil 45 and the normally open contact 4
6 and 47 are closed, and normally closed contacts 48 and 49 are open. Then, an exciting current flows through the field coils 43 and 44, and the armature 42 starts rotating. Next, switch 41
When the relay coil 45 is turned off, current no longer flows to the relay coil 45, so the normally open contacts 46, 47 open, and the normally closed contacts 48,
49 is closed, creating a closed loop in which one field coil 43 is connected in reverse to the armature 42, and the phase of the field flux is reversed, so that the motor becomes a generator. Then, a current flows through the field coil 43 so as to cancel the field flux, and the rotational energy of the motor is dissipated. Since this operation is instantaneous, the fan motor will stop suddenly when the power is turned off. When the fan motor control method using this wiring connection is adopted for the plate ejecting mechanism 5, when the suction cup 24 comes to the position shown in Fig. 4 and the power to the fan motor is turned off, the fan motor suddenly stops due to regenerative braking as described above. However, since the negative pressure inside the suction cup 24 disappears instantaneously, the base paper 21 quickly falls onto the discharged master paper 28. In other words, according to this method, the suction force of the suction cup 24 to the base paper 21 is also eliminated almost at the same time as the power to the fan motor is turned off, so that the plate discharge time can be shortened. The wiring shown in Fig. 9 is a method for sudden stopping of the fan motor using regenerative braking means as in the case of No. 8, but when the power is turned off, current flows through both field coils 53 and 54 to cancel the field flux. This is a method of dissipating the rotational energy of the motor, and the method shown in FIG. 8 makes the braking force even stronger.

As a means for braking the motor, a means for applying a mechanical brake may also be considered, but this would not only complicate the structure but also pose problems in terms of wear resistance of its constituent elements. However, if electric braking means is employed as in this embodiment, a design with a simple structure and high reliability can be achieved in terms of quality.

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 employs a fan motor sudden stop means, so that the plate ejecting process can be carried out smoothly and in a short time. Its industrial value is great.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of the overall configuration showing one embodiment of the present invention, Figs. 2 to 4 are side views for explaining the operation of the plate ejecting mechanism, and Fig. 5 is the relationship between the pressing roller and roller guide. FIG. 6 is a partial perspective view showing the second
7 is a wiring diagram of a normal fan motor, FIG. 8 is a wiring diagram of a fan motor showing one embodiment of the present invention, and FIG. 9 is a diagram of another embodiment of the present invention. FIG. 2 is a wiring diagram of a fan motor. 1... Plate feeding mechanism, 2... Plate making mechanism, 3... Plate feeding mechanism, 4... Printing mechanism, 5... Plate discharging mechanism, 6...
Paper feeding mechanism, 7... Paper ejection mechanism, 40... AC power supply,
41...power switch, 42...armature.

Claims (1)

[Scope of Claims] 1. A plate feeding mechanism that transports rolled base paper, a plate making mechanism that uses a flash discharge tube, a plate feeding mechanism that attaches the plate-made base paper to a printing cylinder, and a printing mechanism that performs mimeograph printing; The plate discharge mechanism uses a fan motor to absorb and discharge used base paper, a paper feed mechanism that supplies printing paper, and a paper discharge mechanism that discharges printed paper. The plate discharge mechanism includes a fan motor sudden stop means. Plate making and printing machines. 2. The plate-making/printing machine according to claim 1, which uses electric braking as means for suddenly stopping the fan motor.