JPH0784316A - Printer - Google Patents

Abstract

PURPOSE:To provide a printer in which a frame body can be closed and stopped easily. CONSTITUTION:In a printer provided with a printing platform 6, on which a photosensitive material and an original film overlap each other and are mounted, arranged on a machine base 1, a frame body 3, which is provided with a glass plate 2 covering the upper face of the printing platform 6 and is hinged freely openably, and a close-stop mechanism fixing the frame body 3 to the printing platform 6, the close-stop mechanism consists of a suction member 15 installed in the frame body 3, a suction port 16 formed in the machine base 1 while facing the suction member 15, and a suction pump communicating with the suction port 16, and the suction pump is operated under the condition that the frame body 3 is closed so as to suck the suction member 15 from the suction port, 16, and consequently, the frame body 3 is fixed in the machine base 1. As the frame body 3 can be closed and stopped only by closing the frame body 3, so that the frame body 3 is easily closed and stopped.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a printing machine. More specifically, the present invention relates to a printing machine used for the work of exposing a light-sensitive material such as a PS plate and an original film in close contact with each other, and printing the content of the original film on the photosensitive material.

[0002]

2. Description of the Related Art Conventionally, a photosensitive material and an original plate film are placed on a printing stand provided on the base of a printing machine in an overlapped manner, and the upper surface is covered with a frame having a glass plate to form a printing stand. The space formed by the glass plate is connected to a vacuum source and sucked,
There is known a printing machine in which the original plate and the photosensitive material are brought into close contact with each other, and in this state, a light source provided above the printing table is turned on to perform exposure (see, for example, Japanese Utility Model Laid-Open No. 64-23043).

An outline of a conventional printing machine of this type will be described with reference to FIG. FIG. 4 is a schematic perspective view of a conventional printing machine.
As shown in FIG. 4, the printing machine is mainly a box-shaped machine base 1
And a frame 3 having a glass plate 2 and a light source 4 for exposure. A flexible rubber sheet 5 is spread on the upper surface of the machine stand 1 to form a baking stand 6, and the baking stand 6 is provided with a pressure reducing hole 7 communicating with a vacuum means (not shown). A rubber packing 8 is fixed to the periphery of the printing table 6. While the glass plate 2 is held on the frame body 3,
The rear edge of the frame body 3 is hinged to the machine base 1 with a hinge 9, and the frame body 3 is formed so as to be openable and closable while holding the glass plate 2. Further, between the frame body 3 and the machine base 1, in order to support the weight of the frame body 3 and facilitate its opening and closing, a damping mechanism 10 using a cushioning material such as oil, air, a spring, etc.
Is provided. One end of an L-shaped strut 11 is fixed to the approximate center of the rear edge of the machine base 1, and the light source 4 for exposure is held at the other end of the strut 11.

The procedure of the printing operation using the printing machine shown in FIG. 4 is as follows. First, the handle 1 provided on the front edge of the frame body 3.
2 is lifted to open the frame 3, the photosensitive material such as a PS plate and the original film are placed on the printing unit 6 in this order, and then the frame 3 is closed and the glass plate 2 is used to print on the printing table 6. Cover. Next, the lock levers 13 provided on both side surfaces of the frame body 3 are engaged with the rods 14 provided on both side surfaces of the machine base 1 to fix the frame body 3, and then the decompression hole 7
The rubber sheet 5, the photosensitive material, the original plate film, and the glass plate 2 are brought into close contact with each other by vacuum suction via, and the contents of the original plate are printed on the photosensitive material by turning on the light source 4 in this state. After the exposure, when the vacuum state is released and the lock lever 13 and the rod 14 are disengaged, the frame 3 is slightly lifted by the action of the damping mechanism 10. afterwards,
The baking operation is completed by opening the frame 3 and taking out the original film and the baked photosensitive material. In addition,
At this time, only the original film may be removed, a different original film may be superposed on the photosensitive material, and printing may be performed again.

[0005]

In the printing machine as described above, the closing mechanism for fixing the frame body 3 in the closed state (in the printing machine, the lock lever 13 and the rod 14) is intended to simplify the operation. Is an indispensable member. That is, the frame 3
Since it has a considerable weight, a damping mechanism 10 is provided for facilitating the opening / closing operation of the frame body 3. The damping mechanism 10 exerts a force to push the frame body 3 upward. When the baking table 6 on which the original plate film is placed is covered with the frame body 3 and the vacuuming operation is performed and there is no closing mechanism for the frame body 3, until the baking portion becomes a vacuum (about 4 to 5 seconds). ), The frame 3 must be pressed, and if there is a closing mechanism, this pressing is unnecessary.
However, in the closing mechanism used in the conventional printing machine, when the frame body 3 is closed, the lock lever 13 and the rod 14 must be engaged while pressing the frame body 3 with one hand. Since the engagement between the lock lever 13 and the rod 14 must be released after the completion of printing, the operation is complicated. Further, since the lock lever 13 and the rod 14 are provided so as to project to the side surface (or front surface) of the frame body 3 and the machine base 1, worker's clothes may be caught, resulting in poor safety and poor appearance. . The present invention has been made to solve the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a printing machine having a closing mechanism that is easy to close and has an excellent design. .

[0006]

DISCLOSURE OF THE INVENTION The present invention, which has been made to solve the above-mentioned problems, provides a printing table which is provided on a machine base and on which a photosensitive material and an original film are placed in an overlapping manner. In a printing machine having a glass plate covering the upper surface of the openable and closable hinge, and a closing mechanism for fixing the frame to the printing table, the closing mechanism is attached to the frame. The suction member, a suction hole formed in the machine base so as to face the suction member, and a suction pump communicating with the suction hole, and the suction pump in a state in which the frame body is closed. Is operated to suck the suction member through the suction hole and fix the frame body to the machine base.

[0007]

The present invention will be described in more detail below with reference to the accompanying drawings showing the embodiments. FIG. 1 is a schematic perspective view showing an embodiment of a printing machine of the present invention, FIG. 2 is a schematic sectional view showing an outline of a frame closing and suction mechanism, and FIG. 3 is an enlarged schematic sectional view showing an outline of a closing mechanism. It is a figure. As shown in the figure,
The printing machine of the present embodiment basically has a configuration similar to that of the conventional printing machine, and the printing operation other than the closing operation is performed in substantially the same manner as the conventional printing machine. The same members as those of the conventional example shown in FIG. 4 are designated by the same reference numerals.
A structural difference between the printing machine of the present invention and the conventional printing machine lies in the closing mechanism of the frame body 3, which is attached to the frame body 3 instead of the conventional closing mechanism composed of the lock lever 13 and the rod 14. The suction member 15, the suction hole 16 formed on the machine base 1 so as to face the suction member 15, and the suction hole 1
A closing mechanism composed of a suction pump 17 communicating with 6 is used.

More specifically, as shown in the drawing, the suction members 15 having a suction cup shape and made of a flexible material such as rubber are provided on the left and right in the vicinity of the lower front end of the side plate of the frame body 3. ing. In addition, to the left and right of the front end of the machine base 1, the frame 3
When the is closed, the suction hole 16 is provided at a position facing the suction member 15. The suction hole 16 communicates with a suction pump 17 provided inside the machine base 1 via a line 18, and the line 18 is an electromagnetic valve that opens and closes the line 18 between the suction hole 16 and the suction pump 17. 19 are provided. A line 20 is connected to the line 18 near the suction pump 17, and the suction pump 1 is connected via the line 20.
7 and the pressure reducing hole 7 provided on the machine base communicate with each other. In addition, the line 20 has a solenoid valve 21 for opening and closing the line 20.
And a solenoid valve 22 for opening the vacuum system of the lines 18 and 20. Further, on the machine base 1, a sensing portion 24 of a limit switch 23 as a sensing means for sensing the closed state of the frame 3 is provided in the vicinity of the suction hole 16 so as to project.
When the frame 4 and the frame 3 come into contact with each other, the limit switch 23 is turned on. The limit switch 23 is linked with the vacuum pump 17, and is set so that the suction pump 17 starts to operate when the limit switch 23 is turned on.

The procedure of the printing operation of the printing machine of the present invention, including the operation of the closing mechanism having the above construction, will be described. First, the operation time of the suction pump 17, the operation timing of the solenoid valves 19, 21 and 22, the lighting timing of the light source 4, and the lighting time are set by the operation panel 25 provided on the front surface of the machine base 1. These controls can be performed by a conventional method such as timer control. Next, with the frame 3 open, the photosensitive material and the original film are placed on the printing table 6 in this order, and then the frame 3 is closed to close the glass plate 2.
The printing table 6 is covered with. At this time, the solenoid valve 19 is in the open state and the solenoid valves 21 and 22 are in the closed state. When the frame body 3 is closed, the limit switch 23 senses the closed state of the frame body 3 and the suction pump 17 When activated, the suction member 16 is pulled by the suction hole 16 through the line 18 and locked, and the frame 3 is fixed to the machine base 1.

When the frame body 3 is fixed, the electromagnetic valve 19 is closed and the electromagnetic valve 21 is opened, and the baking table 6 is evacuated through the line 20 and the pressure reducing hole 7, and the photosensitive material, the original film The glass plate 2 and the glass plate 2 come into close contact with each other, and in this state, the light source 4 lights up, and the content of the original film is printed on the photosensitive material. When the printing is completed, the suction pump 17 is stopped, the solenoid valves 19 and 22 are opened, the vacuum system of the lines 18 and 20 is broken, and the suction of the printing table 6 and the suction member 15 is released. As a result, the lock of the frame body 3 is also released, and the frame body 3 is slightly pushed up by the action of the damping mechanism 10. Then, the frame 3 is opened, and the original film and the photosensitive material are taken out, thereby completing the printing operation.

The printing machine of the present invention is not limited to the above-mentioned example, and can be implemented by appropriately changing it. For example, the electromagnetic valve 19 may not be used, and in this case, the suction member 15 is in the suctioned state from the start of the operation of the suction pump 17 to the opening of the solenoid valve 22. In addition, the suction member 15 and the suction hole 16 facing the suction member 15 may be provided at any position as long as they do not interfere with the printing operation. In the above example, the suction member 15 and the suction hole 16 are the frame 3 and Although one is provided on each of the left and right sides of the machine base 1, a plurality of each may be provided. In this case, the line 18 may be branched and connected to the plurality of suction holes 16. Furthermore, the frame 3
A sensor (for example, a magnetic sensor) may be used as a sensing unit that senses the closed state of the frame 3, and a plurality of sensing units are used to prevent malfunction, all of which are in the closed state of the frame 3. The suction pump 17 may be activated when it senses.

[0012]

According to the present invention, an operator can fix the frame body 3 only by closing the frame body 3, and the fixation of the frame body 3 after the completion of printing is automatically released. Since there is no need to operate the lever like the conventional closing mechanism,
The operability can be significantly improved. In particular, since lever operation is not required, automation including opening / closing of the frame 3 is possible. Further, the closing mechanism has a simple structure, and parts can be easily replaced (mainly, the suction member 15 can be replaced) in terms of maintenance. Further, since there is no protrusion on the side surface or the front surface of the machine base 1, the safety is high and the design is excellent.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an outline of a printing machine according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing an outline of a frame closing and suction mechanism.

FIG. 3 is an enlarged schematic cross-sectional view showing an outline of a frame closing mechanism.

FIG. 4 is a schematic perspective view showing an outline of a conventional printing machine.

[Explanation of symbols]

 1 machine stand 2 glass plate 3 frame 4 light source 5 rubber sheet 6 baking table 8 packing 10 damping mechanism 11 pillar 12 handle 13 lock lever 14 rod 15 suction member 16 suction hole 17 suction pump 18, 20 line 19, 21, 22 electromagnetic Valve 23 limit switch

Claims (2)

[Claims] 1. A frame which is provided on a machine stand and has a baking table on which a light-sensitive material and an original film are stacked and placed, and a glass plate which covers an upper surface of the baking table, and which is hinged to be opened and closed. In a printing machine having a body and a closing mechanism for fixing the frame body to the printing table, the closing mechanism is formed on the machine base facing the suction member and the suction member attached to the frame body. And a suction pump communicating with the suction hole,
A printing machine characterized in that the suction pump is operated while the frame is closed, the suction member is sucked through a suction hole, and the frame is fixed to a machine stand. 2. The printing machine according to claim 1, wherein the operation of the suction pump is linked with a switch or a sensor signal for detecting the closed state of the frame.