JP3205779B2 - Photoengraving frame and printing machine using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photoengraving frame and a photoengraving printer using the same. More specifically, the present invention relates to a frame used for a printer using a Fresnel lens between a light source and a light-transmitting glass plate, and a printer having the frame.

[0002]

2. Description of the Related Art A light source is built in a machine base, a light-transmitting glass plate is provided on the upper surface of the machine base, an original plate and a photoreceptor are superimposed on the glass plate, and the plate is covered with a sheet. A photomechanical printing machine for exposing by illuminating the light source in a state where the space surrounded by the glass plate and the glass plate are communicated with a vacuum source so that the original and the photosensitive member are in close contact with each other is disclosed in JP-B-63-18182.
This is known as disclosed in Japanese Patent Application No. "Hot-burning apparatus" and Japanese Utility Model Publication No. 63-28416 "Vacuum printing machine". FIG. 7 is a schematic front view of a conventional printing machine, and FIG. 8 is a schematic side view thereof. As shown in the figure, a frame body 51 holding a light transmitting glass plate is provided above the machine base 50. Reference numeral 52 denotes a roller cover holding an ironing roller and a spring roller, which are supported by a lifting rod 53 and run horizontally above the light transmitting glass plate. Reference numeral 54 denotes a lower step portion provided at the front upper portion of the machine stand. When the printing machine is not used, the rollers are lowered and stored here. In this type of printing machine, a photomechanical printing machine using a Fresnel lens set between a light source and a light-transmitting glass plate is known. For example, Japanese Patent Application Laid-Open No. 1-243042, "Film Adhesion Reversal Printer and Film Method for Preventing Distortion of Contact Reversal Printer ".

[0003]

A printing machine for photoengraving utilizing the above-mentioned Fresnel lens set has a very high printing accuracy and is an excellent printing machine. However, in conventional printing machines that do not use a Fresnel lens set, only the back surface of the light-transmitting glass plate needs to be cleaned, whereas in the present printing machine, the upper and lower surfaces of the Fresnel lens set need to be cleaned. Cleaning work became difficult. Furthermore, the Fresnel lens set used is generally a three-piece set combined with a top glass and a bottom glass and is heavy, so it is necessary to support it during the cleaning work, and the workability is poor. there were. More specifically, in a printing machine equipped with a Fresnel lens set, the frame 51 is moved forward (to the left in FIG. 8) halfway in order to clean the back surface of the light-transmitting glass plate and the upper and lower surfaces of the Fresnel lens set. It is constructed so that it can be pulled out, and the Fresnel lens set is opened downward. This will be described with reference to FIG.

FIG. 9 shows a frame 51 provided on the upper surface of a printing machine.
The Fresnel lens set 9 in which an upper glass, a Fresnel lens, and a lower glass are sequentially laminated is integrated with a metal fitting 55, and a butterfly bun 56 and a stopper metal fitting 57 are provided below the frame 51. With frame 51
Is held. If this is pulled out to the front, the weight is large and the holding structure is difficult. Therefore, it is pulled out halfway, the stopper metal fitting 57 is removed, and it is lowered slightly downward by using the step 54 of the printing machine main body (in the figure). ,
State shown by a dotted line). Then, in this state, the upper and lower surfaces of the Fresnel lens set 9 and the lower surface of the light transmitting glass plate 6 are cleaned. Reference numeral 58 denotes a spring for supporting the Fresnel lens set 9, and reference numeral 59 denotes a fulcrum of the spring so that the drawn frame 51 does not hit the step 54. In this case, since the opening angle θ is about 20 degrees, it is very difficult to clean the rear surface of the light transmitting glass plate 6 and the upper surface of the Fresnel lens set 9 very much. This opening angle is determined by the step (dimension) in the step 54.
It is determined by how much the frame can be pulled out in terms of mechanical structure strength, but it is difficult to design and clean. The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a frame capable of easily cleaning a light transmitting glass plate and a Fresnel lens set, and a printing machine using the same. I do.

[0005]

Means for Solving the Problems A photoengraving frame according to the present invention, which has been made to solve the above-mentioned problems, has a pair of opposing sides of an opening provided at the center of the upper surface of a printing machine. It comprises a rail provided, an adapter suspended between the rails and moving back and forth along the rail, and a frame rotatably fixed to the adapter, the frame being a light-transmitting glass plate And a Fresnel lens. Further, the photomechanical printing machine of the present invention has a light source built in the machine base, a light transmitting glass plate is provided on the upper surface of the machine base, and the original and the photoreceptor are superimposed on the glass plate and placed thereon. Is covered with a sheet, a space surrounded by the sheet and the glass plate is communicated with a vacuum source, and the light source is turned on in a state where the original and the photoreceptor are in close contact with each other to expose the plate. The above frame is mounted on the upper surface of the machine base.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 to 3 are views showing an example of the frame body of the present invention. FIG. 1 is a schematic rear view, FIG. 2 is a schematic side view, and FIG. 3 is a schematic partial sectional view of the frame body. In the figure, reference numeral 1 denotes a frame, on which a light transmitting glass plate 6 and a Fresnel lens set 9 described later are mounted. Reference numeral 2 denotes a rail, which is provided on each of a pair of opposite sides of an opening formed in the center of the upper surface of the machine base of the printing machine. Reference numeral 3 denotes an adapter. In this example, an adapter formed of a square pipe and having a U-shaped planar shape is used. The left and right legs of the adapter 3 are slidably inserted into the rail 2. In this example, the frame 1 is rotatably fastened to the adapter 3 by the butterfly 4. 5 shown in the figure is a gas stay,
It is a spring mechanism or the like. The right and left U-shaped legs of the adapter 3 are formed shorter than the length of the rail 2.
When the frame 1 is pulled out to the front (to the left in FIG. 2), the adapter 3 connected by the butterfly 4 slides on the rail 2 and the frame 1 is opened by the force of the gas stay 5. In FIG.
The portion indicated by the dotted line indicates a state in which the frame 1 is open. FIG. 3 is a partial sectional view for describing the configuration of the frame 1 in more detail. 6 is a glass plate for light transmission, 7 shown in the figure.
Is a holding bracket, and 8 is a rubber frame for vacuum sealing.
Is provided over the entire circumference of the frame body 1 and is fixed with an adhesive. After the translucent glass plate 6 is placed thereon, the translucent glass plate 6 is fixed by the holding metal 7. There is a gap between the rubber frame 8 and the holding member 7, and vacuum suction is performed through this gap.
Reference numeral 9 denotes a Fresnel lens set, and reference numeral 10 denotes a press fitting thereof. The Fresnel lens set 9 includes a Fresnel lens 13 sandwiched between an upper glass 11 and a lower glass 12, and is fixed to the frame 1 via a holding plate 14 provided around the entire circumference of the frame 1. . Since the frame 1 has the above configuration, the light transmitting glass plate 6 and the Fresnel lens set 9 are provided.
The space 15 formed by the above is a substantially closed space.

[0007] When cleaning the frame 1 having such a configuration, the frame 1 is pulled out to the front and the front end of the frame 1 is lifted upward, so that the lower surface of the Fresnel lens set 9 (ie,
The cleaning is completed by cleaning the lower glass 12) and, if necessary, the upper surface of the light transmitting glass plate 6. The space 15 in the frame 1 is substantially sealed, and it is difficult for dust and moisture to enter the space 15 and the amount of dirt is significantly reduced, so that cleaning is not actually required. Accordingly, it is sufficient to clean only the upper surface of the light transmitting glass plate 6 and the lower surface of the Fresnel lens set 9. In addition, since the frame 1 can be largely opened upward, the lower surface of the Fresnel lens set 9 can be easily cleaned, and in cleaning, it is necessary to consider a wide working space in front of the printing machine. Disappears.

In FIG. 3, the upper glass 11 of the Fresnel lens set 9 may be omitted. In this case, the Fresnel lens set 9 is composed of the Fresnel lens 13 and the lower glass 12, and is fixed to the holding plate 14 by the holding metal 10. With such a structure, the weight of the frame 1 can be reduced.

FIG. 4 is a schematic partial sectional view of another embodiment of the Fresnel lens set 9 mounted on the frame 1. As shown in FIG. FIG.
3 are substantially the same as those shown in FIG. In the figure, Fresnel lens set 9
Consists of a Fresnel lens 13 and a bottom glass 12,
The translucent glass plate 6 and the upper surface of the Fresnel lens 13 are brought into close contact with each other, placed on the rubber frame 8 for vacuum tightness, and pressed and held by the metal fitting 7. Even with such a configuration, since dust and moisture hardly enter between the light transmitting glass plate 6 and the Fresnel lens set 9, the cleaning operation is facilitated and the weight of the frame 1 can be reduced.

FIG. 5 is a schematic rear view of another embodiment of the frame. In this example, the frame 1 is composed of two frames 17 and 1
8. A Fresnel lens set 9 in which a Fresnel lens is sandwiched between an upper glass and a lower glass is mounted on the frame 17, and the frame 17 is rotatably fixed to the adapter 3 by the butterfly 4. Also,
The glass plate 6 for light transmission is attached to the frame body 18,
The frame 18 is rotatably fastened to the frame 17 by a butterfly 16. Therefore, both the frame 17 and the frame 18 travel on the rail 2 together with the adapter 3. However, since the frames 17 and 18 can be separately opened upward, even if dust or moisture enters between the light transmitting glass plate 6 and the Fresnel lens set 9, cleaning can be easily performed.

[0011] The frame of the present invention is not limited to the above example, and can be implemented with appropriate modifications.
1 and 5, the adapter 3 and the frame 1 (or the frame 17) or the frame 17 and the frame 18 are
Or 16, but other members (for example, a rotating shaft member) may be used as long as each frame body can be rotatably fastened. The shape can also be changed as appropriate and implemented.

A printing machine for photoengraving according to the present invention is a printing machine having the above-mentioned frame, and one example thereof is shown in FIG. FIG. 6 is a partial schematic view of a cross section in the left-right direction substantially at the center in the front-rear direction of the printing machine, and shows a state where the sheet 19 is spread on the glass plate 6 for light transmission. In this example, the frame 1 shown in FIGS. 1 to 3 is provided in an opening formed in the center of the upper surface of the machine base 50. 1 to 5 and 7 to 9 are denoted by the same reference numerals, and the front and side views are substantially the same as those in FIGS. 7 and 8, respectively. The same is true. The driving device, vacuum means, and the like provided in such a printing machine are the same as those of a conventional vacuum printing machine. Further, the baking operation can be performed in the same manner as in a conventional baking machine.
No. 2, JP-A 1-243042. Note that the printing machine of the present invention is not limited to the above-described example, and can be appropriately modified and implemented. For example, in the example of FIG.
Is used, but the frame shown in FIG. 4 or FIG. 5 may be used.

[0013]

According to the frame and the printing machine of the present invention, the necessity of cleaning the back surface of the light-transmitting glass plate and the upper surface of the Fresnel lens set is eliminated, or the cleaning becomes easy and easy. Work can be simplified.
Also, there is an effect that a wide working space is not required in front of the printing machine for cleaning. Further, since the structure of the frame having the Fresnel lens is simple, the structure of the printing machine does not need to be complicated with the introduction of the Fresnel lens, and the frame can be easily replaced.

[Brief description of the drawings]

FIG. 1 is a schematic rear view of an embodiment of a frame according to the present invention.

FIG. 2 is a schematic side view of the frame of FIG. 1;

FIG. 3 is a schematic partial sectional view of the frame body of FIG. 1;

FIG. 4 is a schematic partial cross-sectional view of a frame portion according to another embodiment of the frame of the present invention.

FIG. 5 is a schematic rear view of another embodiment of the frame of the present invention.

FIG. 6 is a schematic partial sectional view of a printing machine of the present invention equipped with a frame of the present invention.

FIG. 7 is a schematic front view of a conventional printing machine.

8 is a schematic side view of the printing machine of FIG. 7;

FIG. 9 is a schematic sectional view of a frame having a conventional Fresnel lens set.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Rail 3 Adapter 6 Transparent glass plate 8 Rubber frame 9 Fresnel lens set 11 Top glass 12 Bottom glass 13 Fresnel lens 17 First frame 18 Second frame 19 Sheet 50 Machine base 51 Frame 52 Roller cover 53 Lifting rod 54 Step

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G03B 27/20

Claims (8)

(57) [Claims] 1. A rail provided on a pair of opposite sides of an opening provided in the center of the upper surface of a machine base of a printing machine, an adapter bridged between the rails and moving back and forth along the rail, A frame for photolithography, comprising a frame rotatably fixed to the adapter, the frame including at least a light transmitting glass plate and a Fresnel lens. 2. The Fresnel lens of the frame body comprises a Fresnel lens set in which an upper glass, a Fresnel lens and a lower glass are sequentially laminated, and a space is formed between the upper glass and the light transmitting glass plate. The photoengraving frame according to claim 1. 3. The Fresnel lens of the frame comprises a Fresnel lens set in which a Fresnel lens and a lower glass are laminated, and a space is formed between the Fresnel lens and the light transmitting glass plate. The frame for photoengraving described. 4. The photoengraving frame according to claim 1, wherein the Fresnel lens of the frame comprises a Fresnel lens set in which a Fresnel lens and a bottom glass are laminated, and the light transmitting glass plate and the Fresnel lens are in close contact with each other. . 5. A first frame body rotatably fastened to an adapter and having a Fresnel lens set mounted thereon, and a first frame body rotatably fastened to the first frame body for light transmission. 2. A structure comprising a second frame on which a glass plate is mounted.
The frame for photoengraving described. 6. A light source is built in the machine base, a translucent glass plate is provided on the upper surface of the machine base, an original plate and a photoreceptor are superimposed on the glass plate, and the plate is covered with a sheet. The space surrounded by the glass plate is communicated with a vacuum source, and the light source is turned on in a state where the original plate and the photoconductor are in close contact with each other. Forming a portion, a rail is provided on each of a pair of opposite sides of the opening, an adapter is provided between the rails, and an adapter that moves back and forth along the rail is provided, and at least the light-transmitting glass plate and the Fresnel lens are provided. A photoengraving printing machine in which one mounted frame is rotatably fixed to the adapter. 7. The printing machine for photoengraving according to claim 6, wherein the frame is the frame according to any one of claims 2 to 4. 8. A light source is built in the machine base, a translucent glass plate is provided on the upper surface of the machine base, an original plate and a photoreceptor are superimposed on the glass plate, and the plate is covered with a sheet. The space surrounded by the glass plate is communicated with a vacuum source, and the light source is turned on in a state where the original plate and the photoconductor are in close contact with each other. A rail is provided on each of a pair of opposing sides of the opening, an adapter is provided between the rails, and an adapter that moves back and forth along the rail is provided, and a Fresnel lens set is attached to the adapter. A photoengraving printing machine in which a first frame is rotatably fixed, and a second frame having a light transmitting glass plate is rotatably fixed to the first frame. .