JPH0248108B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of adhering a sheet to a base material, for example, in a vacuum adhesion baking method.

[Prior art]

For example, in plate making, vacuum contact printing is performed. There are two types of vacuum contact printing machines that perform this: upper light source type and lower light source type.

The top light source type has a box-shaped main body with a
A hard base material provided with air suction grooves is provided, and a photosensitive plate and a photographic original plate are superimposed on this hard base material, and the relative positions of the photographic master plate and the photosensitive plate are regulated using pin bars, adhesive tape, etc. These are then covered with a transparent, airtight soft sheet member, and the air between the hard base material and the soft sheet member is sucked out using a vacuum pump, etc., and the photosensitive plate and photographic original plate are placed on the hard base material. The transparent soft member is brought into close contact with the transparent soft member, and the light is emitted from a light source provided above the transparent soft member to perform printing.

In addition, the bottom light source type has a transparent hard base material such as a glass plate on the top of the box-shaped body.
The photographic plate and the photosensitive plate are placed on top of each other on this transparent hard base material, and the relative positions of the photosensitive plate and the photosensitive plate are controlled using pin bars, adhesive tape, etc. Covered with a sheet member, the air between the hard base material and the soft sheet member is sucked out using a vacuum pump, etc., and the photographic original plate and photosensitive plate are brought into close contact with the hard base material. The printing is performed by emitting light from a light source. In addition, regardless of whether the vacuum contact printing machine is an upper light source type or a lower light source type, the soft sheet member is stretched over a frame, and one end of the frame and one end of the main body are connected with a hinge to attach the soft sheet member to the main body. The frame can be opened and closed, one end of the soft sheet member is fixed to the main body, the other end is attached to a roller, and then the soft sheet member is usually wound around this roller, and when in use, this roller is moved. This roller presses the soft sheet member, photosensitive plate, and photographic plate and pushes out the air between the soft sheet member and the hard base material to stretch the soft sheet member. There are those in which a squeezing roller squeezes (squeegee) the soft sheet member, and those in which a plate-shaped member or a brush is used instead of the squeezing roller.
In addition to this, there is also a modified type in which the hard base material and the soft sheet member are inclined.

[Problem that the invention seeks to solve]

However, since only the periphery of the hard base material, ie, the glass plate, of the lower light source type is supported by the main body, the center part is usually lowered by its own weight, and the entire surface is curved. Therefore, in order to bring the photographic original plate and the photosensitive plate into close contact with the glass plate, the surface of the ironing roller is also curved along the glass plate.

However, since glass plates are hot-formed, some of them are hardly curved or curved in the opposite direction depending on their internal composition. The problem was that the surface had to be curved.

In addition, in plate making, regardless of whether the upper light source type or the lower light source type is used, multiple film masters are superimposed and their positions are regulated using pin bars.
These film masters can be pasted together with adhesive tape, for example, a partially cut-out film master plate (partially cut-out pirate film) can be stacked with another film master master, or multiple films can be spaced apart. Since they are placed on a hard base material, unevenness occurs on the hard base material. When an uneven portion occurs in this way, the soft sheet member presses only the above-mentioned convex portion, and a gap is created around the convex portion under the soft sheet member, making it difficult to sufficiently suck air between the hard base material and the soft sheet member. There was a problem that the photosensitive plate and the photographic original plate could not be brought into sufficient contact with each other. In addition, in devices that use rollers, even if the surface of the roller is made of a soft material such as rubber, the soft sheet member is not soft enough to reliably press the recesses, so the above-mentioned close contact still occurs. This is not done sufficiently, and especially when a pin bar is used, the roller presses the soft sheet member only against the convex part of the pin of the pin bar and rides over it, and does not press the base of the pin, resulting in further insufficient adhesion. There were flaws.

The object of the present invention is to provide a method for adhering a sheet to a substrate, which eliminates the above-mentioned drawbacks of the conventional method.

[Means for solving problems]

This invention employs the following method to achieve its purpose. That is, a large number of disks are arranged adjacent to each other in the axial direction, and the axes of the large number of disks are approximately parallel to the surface of the hard base material, and the large number of disks is These many disks are held by a holding member so that a fall of less than a certain amount is allowed and a fall of more than a predetermined amount is prevented, and the sheet placed on the hard base material is covered with a soft sheet member. The holding member is positioned at a predetermined height position on the sheet member, and the outer peripheries of the plurality of disks are pressed against the soft sheet member by the weight of each of the disks, and the plurality of disks are attached to the holding member. In this method, the sheet is brought into close contact with the hard base material by moving the sheet on the soft sheet member.

〔Example〕

An embodiment using the method of the present invention will be described below with reference to FIGS. 1 to 6. FIG. 1 shows a bottom light source type vacuum contact printing machine. In the figure, 1 is a box body, and a glass plate (hard base material) 2 is provided on the top of this box body 1. A rubber gasket 3 is provided around the glass plate 2.
An opaque rubber sheet (soft sheet member) 4 is usually wrapped around a roller 5 on the rubber gasket 3, and when in use, this rubber sheet 4 is placed over the glass plate 2 as a film. It is stretched over an original plate (sheet) 6 and a photosensitive plate (sheet) 7. On the glass plate 2,
The other end of a tube 9 having a vacuum pump 8 attached thereto is attached through the glass plate 2, and the vacuum pump 8 is attached at the other end.
The air between the glass plate 2 and the rubber sheet 4 covering the photosensitive plate 7 and the film original plate 6 is sucked by the operation. Further, a light source 10 is provided within the box body 1 and located below the glass plate 2.

Next, a method of the present invention applied to the vacuum contact printing machine configured as described above will be explained.

First, a large number of ring plates (discs) 12 of the same shape and size
are arranged adjacent to each other in the axial direction, and a rod (holding member) 14 having a diameter much smaller than the inner hole 13 is passed through the inner hole 13 of each ring plate 12, and a collar (holding member) is attached to both ends of the rod 14. ) 15 to connect the plurality of ring plates 12 to these collars 15,
15 and tighten moderately, these collars 1
5 and 15 are fixed to the rod 14 by screws 15a screwed into these collars 15 and 15, and each ring plate 12 is fixed to the rod 14 which is kept approximately horizontal.
The ironing member 11 is constructed in such a way that the iron plate is allowed to fall by a predetermined amount or less and is prevented from falling by a predetermined amount or more due to its own weight. Next, the film original plate 6 and the photosensitive plate 7 are stacked on the glass plate 2. They are placed together and their positions are regulated by pins 16 of the pin bar.

Next, the roller 5 is moved to stretch the rubber sheet 4, and the film original plate 6 and the photosensitive plate 7 are covered with this rubber sheet 4.

Next, the rods 14 of the ironing member 11 are positioned above one side of the rubber sheet 4, approximately parallel to the glass plate 2 and at a predetermined height, and the outer peripheries of the many ring plates 12 are placed on the rubber sheet 4. The ring plates 12 are brought into pressure contact by their own weight.

Next, the rod 14 is moved in parallel from one side of the rubber sheet 4 to the other side. Then, as shown in FIGS. 1 and 2, the ring plate 12 located above the convex part 17, such as the upper part of the pin 16, rises, and the ring plate 12, which is located above the convex part 17, such as the upper part of the pin 16, rises, and the ring plate 12, which is located above the convex part 17, such as the upper part of the pin 16, rises, and it Ring plate 12 located above the concave portion
descends due to its own weight. At this time, each ring plate 12 has the same shape and size, has the same weight, and is movable up and down, so regardless of the unevenness under the rubber sheet 4, each ring plate 12
The rubber sheet 4 is pressed with a uniform pressing force by the weight of each ring plate 12 within the range through which the ring plates 12 pass. As a result, the ring plate 12 presses the convex portion 17 to its very periphery, pushes out the air between the glass plate 2 and the rubber sheet 4, and presses the rubber sheet 4 onto the upper surface 7a of the photosensitive plate 7.
The film original plate 6 and the photosensitive plate 7 are surely brought into close contact with the glass plate 2 via the rubber sheet 4. It should be noted that the ring plate 12 is allowed to fall from the rod 14 by a predetermined amount or less that can sufficiently accommodate the level difference between the convex part 17 and the concave part 18.
The device is prevented from falling more than a predetermined amount to prevent it from falling and detaching.

In the above embodiment, the rod 14 was used as the holding member for the ring plate 12, but the rod 14 is not limited to this. For example, as shown in FIG. A frame member 22 consisting of is used as a holding member, and this frame member 22
A large number of discs 12 may be fitted inside the disc 12 so as not to fall off.

Further, in the first embodiment, the method of the present invention is applied to the adhesion of sheets in a vacuum contact printing machine of the lower light source type, but the method is not limited thereto. Furthermore, the present invention is not limited to adhering sheets to a vacuum contact printing machine, but can also be applied to adhering sheets to hard substrates of other equipment.

〔Effect of the invention〕

As explained above, according to the present invention, a large number of discs are arranged adjacent to each other in the axial direction, and each of the large number of discs is allowed to fall by a predetermined amount or less due to its own weight, and is prevented from falling by a predetermined amount or more. The ironing member is held by a holding member as shown in FIG. Because I did it,
Even if there is an unevenness under the lower surface of the soft sheet member, the plurality of ring plates 12 rise or fall, respectively, and press the soft sheet member tightly against the uneven part,
Since the air between the hard base material and the soft sheet member is pushed out, the sheet can be reliably attached to the hard base material of various devices. For example, when the present invention is applied to a vacuum contact printing machine, the film can be attached to the hard base material. The original plate and the photosensitive plate can be brought into close contact with each other and good printing can be performed.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing an example in which the method of the present invention is applied to the adhesion of a sheet to a hard substrate in a vacuum adhesion baking machine; Fig. 2 is a cross-sectional view showing the ironing member in use; Figure 3 is a perspective view showing the rod passing through the ring plate, Figure 4 is a view taken in the direction of the arrow in Figure 3, Figure 5 is a side view of the squeezing roller, and Figure 6 is taken along the - line in Figure 2. A cross-sectional view along FIG. 7 shows another embodiment of the method of the present invention,
It is a sectional view showing the relationship between a disk and a holding member. 2...Glass plate (hard base material), 4...Rubber sheet (soft sheet member), 6...Film original plate (sheet), 7...Photosensitive plate (sheet), 12...Ring plate (disc), 14... Rod (holding member).

Claims (1)

[Claims] 1 A large number of disks are arranged adjacent to each other in the axial direction, and the axes of these many disks are approximately parallel to the surface of the hard base material, and these many disks have a predetermined amount due to their own weight. Holding a large number of disks by a holding member so that the following drops are allowed and falling more than a predetermined amount is prevented, and the sheet placed on the hard base material is covered with a soft sheet member,
The holding member is positioned at a predetermined height position on the soft sheet member, and the outer periphery of the large number of disks is pressed against the soft sheet member by the weight of each of the disks. A method of adhering a sheet to a base material, comprising moving the sheet together with a holding member on the soft sheet member to bring the sheet into close contact with the hard base material.