JP3434143B2 - Flatbed printing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flatbed printing machine for transferring a pattern formed on a flat plate to the outer peripheral surface of a blanket cylinder (transfer cylinder) and transferring the pattern onto a printing medium.

[0002]

BACKGROUND ART FIG. 3 (A), (B) is a schematic configuration of a conventional flatbed offset printing machine is illustrated, front structure view of the traveling vehicle near the flatbed offset printing machine in FIGS. 4 and 5 It is shown. 6 is a front view showing the structure of a conventional flatbed offset printing press, and FIG. 7 is a side view (Z-Z in FIG. 6 ).
FIG. 8 is a side view showing details of the print roller mounting portion.

[0003] A typical flatbed offset printing machine FIG. 6 to FIG.
Pair of bearing 10a laid on the platform 9 as shown in 8,
A printing platen 5 on which the material to be printed 4 is placed and a printing platen plate 2 on which the printing plate 1 is mounted are arranged between 10b, and the printing platen is located on an extension of the printing platen plate 2. An ink supply roller group 11 is provided on a pedestal 9 on the side opposite to the fifth side (the right end in the drawing). The traveling carriage 6 traveling on the tracks 10a and 10b is equipped with a blanket cylinder (transfer cylinder) 3 and an inking roller 7 which are attached to the traveling carriage 6 so as to be movable up and down.

The blanket cylinder 3 and the inking roller 7 are a pair of frames 12 forming the traveling carriage 6.
a, 12b and levers 13a, 13b pivotally attached to the frames 12a, 12b are rotatably supported. A guide surface 91 of the gantry 9 is provided below the levers 13a and 13b.
A cam follower 14 rolling above is suspended, and the inking roller 7 is provided above the levers 13a and 13b.
Air cylinder 15a for lowering the pressure to apply a pressure,
15b is attached. Further, the blanket cylinder 3 is supported by an eccentric bearing, and the eccentric bearing is rotated by an air cylinder. Running truck 6 is on track 10
By reciprocating on a and 10b, ink is transferred and supplied from the swinging roller 16 of the ink supply roller group 11 to the inking roller 7 in the process.

The inking roller 7 which has received the kneaded ink from the swinging roller 16 advances toward the printing platen 2 side while rotating as the traveling carriage 6 travels, and guides the surface 9.
Immediately before the cam followers 14 a, 14 b rolling on the guide plate 1 enter the printing plate surface plate 2, the guide groove 9 on the guide surface 91.
As it descends by 1a, it descends to a position where it abuts on the upper surface of the printing plate surface plate 2. Subsequently, printing pressure is applied to the printing plate 1 on the printing platen 2 by the air cylinders 15a and 15b to transfer the ink. Next, the blanket cylinder 3 descends and rolls on the printing plate 1 to receive the ink corresponding to the design, and then moves to the printing body 4 on the printing platen 5 and rolls on the printing body 4. Then, the pattern received from the printing plate 1 is transferred to the printing medium 4. After the printing is completed, the traveling carriage 6 moves backward to a predetermined position and stands by at the same position.

[0006] The operator is to print the printed material 4 which has been printed.
After carrying out, the next new printing medium 4 is carried in, alignment (registration) is performed, and after the setting at the predetermined position is completed, the next printing is started. After that, the same operation is sequentially repeated to print the target number of sheets.

In a flatbed printing machine, as shown in FIG. 4 as a typical example, after the ink is transferred and supplied through the ink supply roller group 11, the ink is appropriately kneaded to form a predetermined ink film. through the swing roller 16 form roller 7 metastasized to the printing plate surface plate 2 on the plate 1 a lithographic offset printing machine format supplying ink to the, or on as printing plate surface plate 2 illustrated in FIG. 5 of the There is a gravure offset printing machine of a type in which ink is directly supplied to the printing plate 1 and excess ink is scraped off by a doctor 17.

[0008] FIG. 3 (A), (B) ones, print platen for mounting a printing material 4 and one printing plate surface plate 2 and one of the blanket cylinder 3 and the corresponding 5,1 This is the most common flatbed offset printing machine of the one-color printing type that has only a table.

[0009]

In the conventional flatbed offset printing machine as described above, one printing plate surface plate 2, one blanket cylinder 3 corresponding to the platen plate 2, and the printing medium 4 are printed.
Since it is equipped with only one printing surface plate 5 for mounting the sheet, it can be used for accompanying indirect work such as carry-in, carry-out and alignment (registration) of the material to be printed 4 with respect to the time required for the actual printing work. Since a lot of time is spent, the ratio of the indirect work time to the actual printing time becomes high, the printing ability per printed matter is low, and there is a problem that improvement in productivity is hindered.

An object of the present invention is to carry in and carry out a material to be printed,
An object of the present invention is to provide a flatbed printing press with improved productivity by reducing the time required for indirect work such as alignment and reducing the ratio of the indirect work time to the actual printing work time.

[0011]

The present invention SUMMARY OF] is intended to solve the above problems, hand stage shall be the gist thereof, in the flatbed printing machine, and one of the printing plate surface plate, correspondingly And a plurality of the blanket cylinders are provided, and the printing platens on which the same number of the printing materials as the blanket cylinders are respectively placed are arranged side by side in front of or behind the printing plate platen, or It is arranged on both front and rear sides of the printing platen so that the pattern can be simultaneously transferred from the plurality of blanket cylinders to the objects to be printed on the plurality of printing platens.

According to such means, the same number of printing materials corresponding to the blanket cylinder of the plurality of are arranged, transcription from a plurality of blanket cylinder to a plurality of printing material becomes can be performed at the same time, the printing Indirect work time such as carrying-in, carrying-out time, and alignment time per body is shortened.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS: Figure 1 will be described in detail embodiments of the present invention with reference to FIG. FIG. 1 shows a configuration and an operation explanatory diagram of a flatbed offset printing machine according to a first embodiment of the present invention. (A) is a front view and (B) is a plan view.

In FIG. 1, 9 is a pedestal, 6 is a traveling trolley traveling on the pedestal 9, and 3 is a blanket cylinder mounted on the traveling trolley 6. Reference numeral 2 is a printing plate surface plate installed on the pedestal 9, and 1 is a printing plate placed and fixed on the identification plate 2.

FIG. 1 shows a flatbed offset printing machine according to a first embodiment of the present invention. In this embodiment, one printing plate surface plate 2 has a plurality of blanket cylinders (two in this example) 3a and 3b, and
The printing surface plates 5 on which the same number of printing materials 4 as the number of blanket cylinders 3 are placed are arranged in parallel on the front side of the printing plate surface 2, that is, on the side opposite the blanket cylinder 3 side, and the corresponding printing parameters are set at the time of printing. It is configured so that the design can be transferred to the printing objects 4a and 4b on the board 5a or 5b.

In the first embodiment, the blanket cylinder 3a of the printing plate 1 is first supplied with ink from an ink supply device (not shown) as the traveling carriage 6 travels.
The pattern is transferred to the outer peripheral surface on the side, and then the pattern is transferred from the plate 1 to which ink is supplied again to the outer surface on the side of the other blanket cylinder 3b. After that, the traveling carriage 6 is moved to lower the blanket cylinder 3a corresponding to the printing surface plate 5a,
The pattern is transferred to the printing object 4a on the printing platen 5a. Next, the blanket cylinder 3b is lowered corresponding to the printing surface plate 5b, and the design is transferred to the printing object 4b on the identification plate 5b. After completing a series of printing as described above, the traveling carriage 6
To the original position and stop. In this state, the objects to be printed 4a, 4b are removed, and the next new objects to be printed 4a, 4b are printed.
After the sheet has been carried in, it is registered through a positioning device (not shown), that is, the position of the printing medium 4 is set.

In this embodiment, the two sets 4a and 4b of the printing materials arranged side by side can be collectively attached and detached,
Not only can the same function as the first embodiment be obtained,
Further, by providing the two blanket cylinders 3a and 3b, the traveling distance of the traveling carriage 6, that is, the return time can be shortened.

[0018] Figure 1 a printing operation process in this embodiment (A)
Is shown in S3.

FIG. 2 shows a flatbed offset printing machine according to the second embodiment of the present invention. In this embodiment, one printing plate surface plate 2 and a plurality of blanket cylinders (two on this side) 3a and 3b corresponding thereto are provided, and traveling carriages are provided on both front and rear sides of the printing plate surface plate 2. 6 as many blanket cylinders 3 provided on 6
Are provided with printing platens 5a, 5b and 5c, 5d on which the blanket cylinder 3a is placed on the printing plate 4 on the front side and the rear side of the printing platen 2, respectively, on the printing object 4 on the corresponding printing platen 5. , 3b so that the pattern can be transferred.

In the second embodiment, the traveling carriage 6 travels to transfer a pattern from the printing plate 1 supplied with ink onto the outer peripheral surface of the blanket cylinder 3a, and then the printing plate 1 supplied with ink again. The pattern is transferred to the outer peripheral surface on the blanket cylinder 3b side. Then, the traveling carriage 6 is moved to lower the blanket cylinder 3a corresponding to the printing surface plate 5a, transfer the pattern to the printing object 4a on the identification plate 5a, and then correspond to the printing surface plate 5b. 3b is lowered, and the design is transferred to the printing object 4b on the identification board 5b.

After that, the traveling carriage 6 is retracted, the pattern is transferred from the printing plate 1 to which the ink is supplied onto the outer peripheral surface of the blanket cylinder 3a, and then the printing plate 1 to which the ink is supplied again.
The pattern is transferred to the outer peripheral surface on the blanket cylinder 3b side. This process is repeated the required number of times.

Subsequently, the traveling carriage 6 is moved backward, the blanket cylinder 3a is lowered corresponding to the printing platen 5c, the pattern is transferred to the printing object 4c on the identification plate 5c, and then the printing platen 5d is corresponded. Then, the blanket cylinder 3b is lowered, and the design is transferred to the printing object 4d on the identification board. This process is repeated as many times as necessary. After the series of printing is completed as described above, the traveling carriage 6 is moved to the original initial position and stopped.

In this embodiment, since the printing platen 5, that is, the printing materials 4a to 4d are arranged in front of and behind the printing plate surface 2, printing is performed on the printing materials 4c and 4d on the rear side. While the carriages 6 do not come to the upper portions of the front print-receiving materials 4a and 4b, the front print-receiving materials 4a and 4b arranged side by side between them are carried out and a new print-receiving material is carried in, Preparations for the next printing can be performed, such as registering. Similarly, during printing on the front print-receiving materials 4a and 4b, the rear print-receiving materials 4c and 4d arranged side by side can be replaced and replaced.

In addition, in this embodiment, two printing platens 5a, 5b and 5c, 5 are provided in front of and behind the printing plate platen 2, respectively.
d, that is, the print objects 4a, 4b and 4c, 4d are provided, and the print objects 4a and 4b or 4c and 4d on each side which are arranged in parallel can be collectively attached and detached, and carried out, carried in, and It is possible to efficiently perform a series of indirect operations such as alignment (registration) and replacement and replacement of the printing medium 4.

Further, particularly in the case of printing a large format, since the traveling carriage 6 stays on one side of the printing platen plate 2 for a long time, a sufficient time for replacement and replacement of the material to be printed 4 is obtained. There is also an advantage that it can be multiplied.

FIG. 2 shows the printing work process in this embodiment.
This is shown in S4 of (A).

Regarding the combination of the blanket cylinder 3 corresponding to the material to be printed 4, the printing order, etc., the first ,
Settings other than the second mode are also possible. Further, the present invention can be applied to various types of printers such as an intaglio type or a letterpress type, in addition to the offset type printer according to the above-described embodiment.

[0028]

The present invention is configured as described above,
According to the present invention, arranged blanket cylinder pair Shi several double the printing plate surface plate one forward a plurality of printing plate that the printing material is placed further above the printing plate surface plate, Since they are arranged on the rear side, or on the front side and the rear side, the pattern can be transferred continuously or simultaneously by the blanket cylinder to a plurality of printing objects arranged in parallel. This makes it possible to reduce the ratio of indirect time required for loading, unloading, alignment (registration), and the like of the printing medium with respect to the actual time required for printing. In short, according to the flatbed printing machine of the present invention, (a) a plurality of printing materials can be collectively loaded and unloaded in the replacement and replacement of the printing materials.

(B) During the printing operation, it becomes possible to replace and replace the material to be printed in parallel in time.

(C) The traveling distance (moving time) of the traveling carriage to which the blanket cylinder is attached can be shortened.

By means of the above, the work time associated with printing can be shortened, and the time required for printing per sheet to be printed can be shortened, thereby greatly improving the productivity.

[Brief description of drawings]

FIG. 1 is a configuration and operation explanatory view of a flatbed offset printing machine according to a first embodiment of the present invention, (A) is a front view,
(B) is a plan view.

FIG. 2 is an illustration corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 3 is a corresponding view of FIG. 1 showing a conventional flatbed offset printing machine.

FIG. 4 is a first view in the vicinity of a traveling carriage in a conventional flatbed printing machine.
The side view which shows an example.

FIG. 5 is a side view showing a second example of the above.

FIG. 6 is a configuration diagram showing a schematic overall configuration of a conventional flatbed offset printing machine.

FIG. 7 is a view on arrow Z-Z of FIG.

FIG. 8 is a detailed view of a printing roller mounting portion in a conventional flatbed offset printing machine.

[Explanation of symbols]

1 printing plate 2 Printing plate 3,3a, 3b Blanket cylinder 4a, 4b, 4c, 4d Printed body 5a, 5b, 5c, 5d Printing surface plate 6 traveling cart 7 Ink roller 9 mounts

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B41F 3/20

Claims (2)

(57) [Claims] 1. A pattern is formed on a plate-shaped printing plate placed on a printing platen, and the pattern is once transferred to an outer peripheral surface of a blanket cylinder provided on a carriage running in the printing direction. A flatbed printing machine configured to transfer the pattern onto a material to be printed, wherein one printing plate surface plate and a plurality of blanket cylinders corresponding thereto are provided,
The printing platens on which the same number of printing materials as the blanket cylinders are placed are arranged in parallel on one side in front of or behind the printing plate platen, and a plurality of printing platens are arranged from the plurality of blanket cylinders. Transfer the above pattern onto one printed material
Then , a flatbed printing machine characterized in that the above-mentioned pattern can be transferred onto another printing medium . 2. A pattern is formed on a plate-shaped printing plate placed on a printing platen, and the pattern is once transferred to an outer peripheral surface of a blanket cylinder provided on a carriage running in the printing direction. A flatbed printing machine configured to transfer the pattern onto a material to be printed, wherein one printing plate surface plate and a plurality of blanket cylinders corresponding thereto are provided,
The printing plate of the blanket cylinder and the same number of the printing materials are respectively placed are arranged on both sides of the front and rear of the printing plate surface plate 1 of a plurality of printing platen from the plurality of blanket cylinders Transfer the above pattern to one substrate and then
A flatbed printing machine characterized in that the above-mentioned pattern can be transferred onto a material to be printed .