JPH0446277Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a novel proposal for a film document fixing device.

More specifically, there is a holding frame, that is, a document holder equipped with a transparent plate that holds a film document, which constitutes a part of a vacuum contact printing device such as a plate printing machine, and a document holder that is continuously used while being attached to and detached from this document holder. With regard to the base film, the film original can be fixed to the original holder simply and quickly by making it possible to regulate and fix the position of the base film on the original holder with a simple operation. This relates to a proposal for a fixation device.

A printing press is suitable for carrying out the present invention, and the following explanation will be given by taking the printing press as an example. First, in order to help understand the present invention, an overview of the printing press will be explained. The description will be given based on FIG. 1, which is a schematic front view of a known plate printing machine. In other words, printing presses generally print six or more sides of the images in one film manuscript onto one plate material (PS plate, etc.).
This is a device for performing so-called multi-sided grilling, and in order to obtain this multi-sided grilling, the following steps are taken.

(a) First, the plate material 2 is positioned and mounted on the plate material holder 1.

(b) On the other hand, in addition to this, the film original 3 having the image 30 is mounted on a holding frame equipped with a transparent plate 40 on which the film original 3 can be mounted, that is, the original holder 4.
position and install. The film original 3, the image 30, and the adhesive tape 12' for fixing the film original are indicated by dotted lines because when the original holder 4 is in the printing position (upright) as shown in the figure, these are attached to the transparent plate 40. This is because it is located on the opposite side.

(c) Therefore, by driving the feed screw 5 in the left-right direction, the support stand 7 mounted on the base 6 is moved to the required position in the left-right direction, and the upper and lower parts erected on the support stand 7 are moved. A moving frame 10 holds the document holder 4 by driving a feed screw 8 in the direction, has a guide rod 100 at its lower end, and is movable up and down along a guide rail 9.
is moved to a required position in the vertical direction, and the document holder 4, that is, the film document 3, is moved to a predetermined printing position on the surface of the plate material 2.

(d) Then, a contact mechanism (not shown) installed in the plate printing machine is further driven to bring the film original 3 into close contact with the two sides of the printing plate, and a light source lamp (not shown) is turned on to perform exposure printing. An image is printed at the first location for image printing on two predetermined sides of the plate material.

By repeating the operations (c) and (d) below,
The second and subsequent images are printed in sequence.

In the figure, 11 is a plate material holder support column, and 12 is an adhesive tape for fixing the plate material.

By the way, in the above work (b), it is necessary to accurately position and fix the film original 3 at a predetermined position on the transparent plate 40 surface of the original holder 4, and a cross gauge is used for this work. method of directly attaching the film original 3 to the transparent plate 40 (first method)
The figure shows a case using this method), but compared to this method, the workability is superior, and the transparent plate 40
The method using a base film (hereinafter referred to as the "base film method") is now the most popular method because there is less risk of staining the surface.

The present invention aims to fundamentally improve the workability of the base film method. First, we will explain the currently used base film method based on Figure 2, and also explain the present invention. Clarify the motivation behind the proposal.

First, the film original 3 is accurately positioned and pasted on the surface of the base film 13 using a gauge. Therefore, this base film 13 is placed on the surface of the transparent plate 40, and pin holes 130 in the base film 13, which have been previously provided at required locations, are placed on the transparent plate 40.
and the pin hole 41 in the original holder 4, and insert the pin 14 into the pin holes 130 and 41 to lock the base film 13 on the original holder 4.

Therefore, by fixing the corners of the base film 13 with adhesive tape 12' or by vacuum adhering the edge of the base film 13 to the surface of the transparent plate 40, and finally pulling out the pin 14, this can be done. The work is completed.

This base film method has the advantages of workability, such as being able to mount the next film original 3 on the base film 13 during the printing process, that is, preparing for the next printing, and direct transparency. Although there is an advantage that there is less risk of staining the transparent plate 40 surface with glue scraps, etc., as in the case of mounting the film original 3 on the light plate 40 surface, this method is particularly advantageous from the viewpoint of improving workability. A rigorous review will highlight areas that require improvement.

That is, the first point is that in order to lock the film original 3 to the original holder 4, the pin 14 must be pressed one by one.
It is necessary to insert and remove the pins, which inevitably reduces work efficiency due to the complexity of the work, and it is easy to cause pin loss accidents (resulting in reduced work efficiency and work errors due to worker irritation).

The second point is the transparent plate 40 of the base film 13.
As a means of fixing to the surface, the corners of the base film 13 are fixed with adhesive tape 12', or
It is necessary to operate the vacuum adsorption mechanism separately, which inevitably reduces work efficiency due to the complexity of the work, and does not completely eliminate the possibility of adhesive waste generation. When a mechanism is provided, it is difficult to avoid mechanical complexity.

The present invention involves regulating the position of the base film on the document holder as described above, and attaching the base film to the document holder while maintaining the regulated position.
By proposing a technology that enables fixing of the film with simple operations, the above-mentioned conventional problems are solved at once.The present invention will be described in detail below based on the example diagrams. I'll explain.

FIGS. 3 to 6 show examples of the present invention. First, a pin for locking the base film and a driving mechanism thereof will be explained based on FIGS. 3 and 4.

That is, 15 is the frame portion 4 of the document holder 4.
2, and the pin hole 15 is surrounded by a reinforcing member 16.

A pin 20, which is screwed onto the tip of the piston rod 18 of the air cylinder 17 via a fastener 19, is fitted into the pin hole 15. can freely slide up and down within the pin hole 15 as the piston 21 slides within the cylinder.

The air cylinder 17 is connected to the reinforcing member 16
Since the piston 21 and the piston rod 18 are screwed and tightened via the fastener 23 to the holder 22 which is fixed to the piston 22, there is no need to worry about the piston 21 or the piston rod 18 wobbling.

In addition, the base cylinder portion 171 of the air cylinder 17
An air supply/extraction tube 24 is screwed onto the air supply/extraction tube 24, and is further connected to a vacuum pump mechanism via a control means such as a three-way solenoid valve (not shown). A pipe 25 is fitted, and an air supply/exhaust passage 26 is formed.

On the other hand, the spring 2 is attached to the piston rod 18.
7 is wound around the piston 21, and the piston 21 is urged toward the base cylinder portion 171 by the spring 27.

In addition, 28 is a fixture for fixing the holding body 22 to the reinforcing member 16, 29 is an air circulation hole formed at the tip of the air cylinder 17, and 3
2 is a packing for forming a vacuum chamber that is attached to the frame portion 42 of the document holder 4. As shown in FIG.

Next, other components of the present invention will be explained below with reference to FIGS. 5 and 6.

In the present invention, a rubber magnet 3 is attached to the base film attachment surface of the frame portion 42 of the document holder 4.
0's are embedded all around.

In order to achieve the object of the present invention, a base film specially constructed for exclusive use with the document holder having the above structure is required, and a base film constructed for this purpose will be described below.

That is, the base film 13 according to the present invention
An ultra-thin iron plate 31 is attached and fixed to the peripheral end portion corresponding to the rubber magnet 30.

The present invention is constructed as described above, and the operation of the present invention will now be explained.

First, the following operations are performed to make the pin 20 protrude from the surface of the transparent plate 40, as shown in FIG. 4, and to make the base film 13 lockable.

That is, an operation button (not shown) electrically connected to the control means (three-way solenoid valve) for the vacuum pump mechanism is turned on.

Then, due to the operation of the three-way solenoid valve, air is forced into the air cylinder 17 from the vacuum pump mechanism through the air supply/exhaust passage 26.

Due to this air pressure, the piston 21 is lifted to the tip against the downward force of the spring 27, and the pin 20 protrudes from the surface of the transparent plate 40 as shown in the figure.

Therefore, the base film 13, which has a pin hole 130 drilled at a position where it engages with the pin 20, is bent somewhat into the shape of a pot bottom around the pin part, and the pin hole 130 is aligned with the pin 20, and the transparent plate is folded. When the base film 13 is lowered onto the pin 2
0, it becomes locked to the original holder 4, but
At the same time, the rubber magnet 30 embedded in the frame portion 42 attracts the ultra-thin iron plate 31 attached to the base film 13, so that the base film 13 is actually placed on the transparent plate 40. Fixed on top.

All you have to do now is turn off the above operation button and the above task (b) will be completed. That is, when the operation button is turned OFF, the vacuum pump mechanism is activated by the action of the three-way solenoid valve, and the air existing in the space 170 inside the air cylinder 17 shown in FIG. aisle 26
Degassed through.

At the same time, air is sucked into the air cylinder 17 from the air circulation hole 29, so the piston 21 is pulled downward, but at this time, the piston 21 is also receiving the force of the spring 27. Then, the air is instantly released as shown in the third diagram.
Since it is lowered to the base end 171 inside the cylinder 17 and the pin 20 is also inevitably moved back to the surface of the transparent plate 40, all that is left to do is return the document holder 4 to the printing position and immediately start the next process (c). It becomes possible to implement

Although it was not adopted in the embodiment, in order to attach the base film 13, in consideration of the case where the user forgets to move the pin 20 back to the transparent plate 40 surface after attaching the base film 13. By installing a limit switch that operates the vacuum pump mechanism to retract the pin 20 at the point where it comes into contact when the unfolded document holder is returned to its original position, accidents on the product and machine can be avoided. can be completely prevented.

Also, in order to make the pin 20 protrude, it was explained that the operation button should be turned on, but the base film 1
3, a limit switch is provided at the point that comes into contact when the document holder is unfolded horizontally, and when the document holder is unfolded, the air pump mechanism is automatically activated, and the pin 20 is also automatically activated. Needless to say, it may be configured so that it protrudes from the outside.

As is clear from the above explanation, according to the present invention, a pin is made to protrude from the transparent plate surface by button operation, and the base film is inserted into the transparent plate while fitting the pin into the pin hole of the base film. Place the base film on the document holder, and then press the button to move the pin back to the transparent plate surface to complete the attachment of the base film to the document holder. This greatly improves work efficiency.

Moreover, since the troublesome work of inserting and removing pins, which is required in the conventional method, is not required, it eliminates the troublesome work and the frustration of workers due to accidental loss of pins and the resulting work errors. The practical effect is sufficient.

The above-mentioned embodiment uses an air cylinder mechanism as a means for reciprocating the pin, but the invention is not limited to the above-mentioned embodiment; It goes without saying that any mechanism (such as an electromagnetic solenoid, cam, etc.) that can provide reciprocating movement over a fixed distance may be used.

Further, this does not preclude a configuration in which the pair of pins are driven simultaneously by integrating the drive source and providing a link mechanism between the drive source and the pin.

Furthermore, the means for fixing the base film to the original document holder is not limited to the embodiments, as long as it is made of a material that attracts each other through magnetic action (for example, the base film is attached to the base film using rubber, etc. The object to which the magnet is attached may be reversed, and the thin iron material may be attached to the document holder.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of a known printing press, Fig. 2 is a diagram showing how to attach a base film to a document holder using a conventional method, and Fig. 3 and subsequent figures are illustrations of an embodiment of the present invention. FIG. 4 is a longitudinal cross-sectional view of the present invention; FIG. 5 is a perspective view of the surface of the base film to which an ultra-thin iron plate is attached; FIG. 6 is a view of the base film according to the present invention. FIG. 4 is a diagram showing how to attach the document to the document holder. Description of symbols, 4...Document holder, 13...Base film, 17...Air cylinder, 1
8... Piston rod, 20... Pin, 21...
...Piston, 30...Rubber magnet, 31
...Ultra-thin iron plate, 40...Transparent plate, 130...Pin hole.

Claims (1)

[Scope of utility model registration request] A plurality of pins for regulating the position of the base film, which are retractable from the mounting surface, are provided around the transparent plate that serves as the base film mounting surface of the frame portion of the document holder.・A document holder with a magnet for fixing the base film around the light-transmitting plate that serves as the film mounting surface, and a pin hole in the position corresponding to the position regulating pin, and a document holder that corresponds to the magnet. A film document fixing device comprising a base and a film having thin iron material attached at certain points.