JPH1095093A - Flat-bed printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat-bed printer whose productivity is improved by shortening a time to be taken for indirect operations such as carry-in, carry-out, and alignment of matters to be printed and reducing a ratio of the time for the indirect operations to a time of actual printing operation. SOLUTION: A flat-bed printer comprises a printing plate surface plate 2 and one or several blanket cylinders 3 corresponding to the printing plate surface plate. A plurality of printing surface plates 5a on which matters to be printed 4a are to be placed are provided. The printing surface plates 5a are arranged at one side at the front or back part of the printing plate surface plate 2 in parallel, or arranged at both sides. On any one or a plurality of the matters to be printed 4a arranged on the printing surface plates 5a, picture patterns can be transferred simultaneously by the blanket cylinders 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art FIGS. 5A and 5B show a schematic configuration of a conventional flat-bed offset printing press. FIGS. 6 and 7 are front structural views of the flat-bed offset printing press in the vicinity of a traveling carriage. It is shown. FIG. 8 is a front view showing the structure of a conventional flatbed offset printing press, and FIG. 9 is a side view (ZZ of FIG. 8).
FIG. 10 is a side view showing details of the print roller mounting portion.

A general flatbed offset printing press includes a pair of tracks 10 laid on a gantry 9 as shown in FIGS.
The printing platen 5 on which the printing medium 4 is placed and the printing platen 2 on which the printing plate 1 is mounted are disposed between the printing platen a and the printing plate 1. An ink supply roller group 11 is provided on a pedestal 9 on the side (the right end in the figure) opposite to the surface plate 5 side. The traveling carriage 6 traveling on the tracks 10a and 10b is provided with a blanket cylinder (transfer cylinder) 3 and an ink applying roller 7 which are attached to the traveling carriage 6 so as to be able to move up and down.

[0004] The blanket cylinder 3 and the inking roller 7 are formed by a pair of frames 12 forming the traveling carriage 6.
a, 12b and levers 13a, 13b pivotally attached to the frames 12a, 12b. A guide surface 91 of the gantry 9 is provided below the levers 13a and 13b.
A cam follower 14 that rolls upward is suspended, and the ink forming roller 7 is provided above the levers 13a and 13b.
Lowers the air cylinder 15a to apply the pressing force.
15b is attached. Further, the blanket cylinder 3 is supported by an eccentric bearing, and the eccentric bearing is rotated by an air cylinder. The traveling carriage 6 is the track 10
The ink is transferred and supplied from the oscillating roller 16 of the ink supply roller group 11 to the ink forming roller 7 in the process by reciprocating on the a and b.

[0005] The ink application roller 7 that has received the ink kneaded from the oscillating roller 16 advances toward the printing platen 2 while rotating as the traveling carriage 6 travels, and guides the guide surface 9.
Immediately before the cam followers 14a and 14b rolling on the first plate 1 enter the printing platen 2, the guide grooves 9 on the guide surface 91 are provided.
1a, it descends to a position where it comes into contact with the upper surface of the printing platen 2. Subsequently, the 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 picture, and then moves to the printing substrate 4 on the printing platen 5 and rolls on the printing substrate 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 retreats to a predetermined position and waits at the same position.

[0006] The operator prints the printed material 4
Is carried out, the next new printing medium 4 is carried in, alignment (registration) is performed, and after setting to a predetermined position is completed, the next printing is started. Thereafter, the same operation is sequentially repeated to print a desired number of sheets.

In a flatbed printing machine, as shown in FIG. 6 as a typical example, in a process of transferring and supplying ink via an ink supply roller group 11, the ink is appropriately kneaded to form a predetermined ink film. A planographic offset printing press of a type in which ink is transferred to the inking roller 7 via the oscillating roller 16 and ink is supplied to the printing plate 1 on the printing platen 2, or on the printing platen 2 as illustrated in FIG. There is a gravure offset printing press of the type in which ink is directly supplied to the printing plate 1 and the surplus ink is scraped off by the doctor 17.

FIGS. 5A and 5B show a printing platen 2, a corresponding blanket cylinder 3 and a printing platen 5 on which a printing medium 4 is placed. It is the most common flatbed offset printing press of the one-color printing type with only a stand.

[0009]

In the conventional flat-bed offset printing press as described above, one printing platen plate 2, one blanket cylinder 3 corresponding to the platen plate 2, and a printing medium 4 are provided.
Is provided with only one printing platen 5 on which the printing material is placed, so that the time required for the actual printing operation can be reduced by the associated indirect operations such as loading, unloading and alignment (registration) of the printing medium 4. Since a lot of time is spent, the ratio of the indirect operation time to the actual printing time is increased, and there is a problem that the printing capacity per printed material is low, and improvement in productivity is hindered.

An object of the present invention is to carry in and carry out a printing medium,
An object of the present invention is to provide a flatbed printing machine in which productivity is improved by shortening the time required for indirect work such as alignment and reducing the ratio of indirect work time to actual printing work time.

[0011]

Means for Solving the Problems The present invention solves the above-mentioned problems, and a first means of the present invention is to form a pattern on a plate-shaped printing plate placed on a printing platen. A flatbed printing machine configured to form and temporarily transfer the same pattern to the outer peripheral surface of a blanket cylinder provided on a carriage traveling in the printing direction, and further transfer the above-described pattern onto a printing medium, One printing plate surface and one blanket cylinder corresponding to the printing plate surface are provided, and a plurality of printing surface plates on which the printing materials are respectively mounted are provided. , Arranged in parallel on one side of the front or back of the printing platen, or arranged on both the front and back sides of the printing platen, and the blanket cylinder prints on the plurality of printing platens. The above pattern is configured to be transferable to any one of the bodies.

[0012] According to the above means, a plurality of printing plates on which a printing medium is mounted on one printing plate plate and one blanket cylinder are placed in front of or behind the printing plate plate. By arranging on one side, or on both front and rear sides, a pattern is continuously transferred by a blanket cylinder to a juxtaposed printing medium, and then a plurality of sets of the printing medium are simultaneously removed, or before the blanket cylinder transfer. Can be installed simultaneously.

As a result, the indirect work time such as loading time, unloading time, alignment time, etc. per one printing medium can be greatly reduced as compared with the conventional means. Replacement work becomes possible.

The second means is that, in the flatbed printing press, one printing plate surface plate and a plurality of the blanket cylinders corresponding to the printing platen are provided, and the same number of blanket cylinders as the blanket cylinders are provided. The printing platen on which the bodies are placed, respectively, is arranged in parallel on one side in front of or behind the printing platen plate, or arranged on both the front and back sides of the printing platen plate, and the blanket cylinders The present invention is characterized in that the above-mentioned pattern can be simultaneously transferred to a plurality of printing substrates on a printing platen.

According to this means, since the same number of printing materials are arranged corresponding to the plurality of blanket cylinders, the transfer from the plurality of blanket cylinders to the plurality of printing materials can be performed at the same time. The above 1
Indirect work time such as loading time, unloading time and alignment time per unit is reduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. 1A and 1B show a configuration and an operation explanatory view of a flatbed offset printing press according to a first embodiment of the present invention, wherein FIG. 1A is a front view and FIG. 1B is a plan view.

In FIG. 1, reference numeral 9 denotes a gantry, 6 denotes a trolley running on the gantry 9, 3 denotes a blanket cylinder mounted on the trolley 6, and 7 denotes an inking roller. Reference numeral 2 denotes a printing platen provided on the gantry 9, and 1 denotes a printing plate placed and fixed on the identification plate 2.

In this embodiment, there is provided one printing plate surface plate 2 to which the printing plate 1 is fixed as described above, and one blanket cylinder 3 corresponding to the printing plate surface plate 2. It has two printing platens 5a and 5b to be placed.
The printing platens 5a and 5b are arranged in parallel on the front side of the printing platen 2, that is, on the side opposite to the blanket cylinder 3, and the printing medium 4a selectively on one of the printing platens 5a or 5b during printing. , 4b.

In the flatbed offset printing press constructed as described above, the traveling carriage 6 is run from the initial position, and a predetermined ink is transferred and supplied onto the printing plate 1 via the inking roller 7, and then the running is performed. The blanket cylinder 3 attached to the carriage 6 is brought into contact with the printing plate 1 to transfer a picture to the outer peripheral surface of the blanket cylinder 3. After that, the carriage 6 is printed on the printing platen 5a.
The blanket cylinder 3 is moved down to lower the blanket cylinder 3, and the pattern on the outer peripheral surface of the blanket cylinder 3 is transferred onto the printing medium 4 mounted on the printing platen 5a. This operation is repeated as many times as necessary.

Subsequently, after the traveling carriage 6 is retracted to the initial position, the traveling carriage 6 is moved forward again to transfer and supply the ink onto the printing plate 1 via the inking roller 7 in the same manner as described above, and then to the blanket cylinder 3. Transfer the picture. Then, the traveling carriage 6 is passed through the printing platen 5a where printing has been completed,
b, the blanket cylinder 3 is lowered, and the pattern on the outer peripheral surface of the blanket cylinder 3 is transferred onto the printing medium 4b mounted on the printing platen 5b. This operation is repeated as necessary. After a series of printing is completed as described above, the traveling carriage 6 is moved to the original initial position and stopped.

In this state, the printing material 4a, which has completed printing,
4b, the next new printing medium 4a, 4b is carried in, and then registration (alignment), that is, the fixed position of the printing medium 4a, 4b is set via a positioning device (not shown). The printing plate 1 or the printing medium 4
The position of the blanket cylinder 3 with respect to a and 4b, that is, the position of the traveling vehicle 6, is detected by feeding back a signal from an encoder incorporated in a ball screw 8 (see FIG. 9) or the like, which is a traveling driving means of the traveling vehicle 6, and the like. I do.

If the eccentric mechanism is operated at a predetermined position with respect to the printing platen 2 and the printing platen 5a, 5b measured by the above means, a blanket is put on the target printing plate 1, the printing medium 4a or 4b. The body 3 can be engaged (contacted).

As described above, in this embodiment, two sets of the printing objects 4a and 4b arranged side by side can be attached and detached at a time, and the time required for loading and unloading one piece is smaller than that of the conventional type. It is possible to greatly shorten the time. FIG.
In (A), S1 indicates a working process in this embodiment.

In the embodiment shown in FIG. 1, the two printing platens 5a and 5b are arranged in front of the printing platen 2, but the two printing platens 5a and 5b are connected to the printing platen. 2 and the back of the blanket cylinder 3.

FIG. 2 schematically shows a flatbed offset printing press according to a second embodiment of the present invention. In this embodiment, a printing platen 2 and a corresponding blanket cylinder 3 corresponding to the printing platen 2 are provided.
Are provided with two printing platens 5a and 5b on which are mounted. The printing platens 5a and 5b are arranged on both sides of the printing platen 2 in the front-rear direction, and are selectively (alternate) at the time of printing.
The pattern can be transferred to any one of the printing plates 4a and 4b on the printing platen 5a or 5b.

In the flatbed offset printing press constructed as described above, the blanket cylinder 3 on which the pattern has been transferred from the printing plate 1 to which the ink has been supplied to the outer peripheral surface by the traveling of the traveling carriage 6 in the same manner as in the first embodiment is formed. The pattern is moved to the printing platen 5a and lowered, and the pattern is transferred to the printing medium 4a on the printing platen 5a. This operation is repeated as many times as necessary. Next, after the traveling carriage 6 is retracted to the initial position, the traveling carriage 6 is moved forward again, and the blanket cylinder 3 on which the pattern is transferred from the printing plate 1 to which the ink is supplied to the outer peripheral surface is moved in the same manner as described above. The pattern is moved to the printing platen 5b and lowered, and the pattern is transferred to the printing medium 4b on the identification plate 5b. This process is repeated as necessary. Then, the printing medium 4a is replaced during this process, registration is performed, and the printing is completed.

As described above, after a series of printing is completed, the carriage 6 is moved to the initial position, and printing is again performed on the printing plate 4a on the printing platen 5a side. During this printing, the other printing medium 4
Exchange b to complete the alignment.

In this embodiment, since the printing platens 5a and 5b and the printing materials 4a and 4b are arranged separately before and after the printing platen 2, printing is performed on the printing material 4b on the rear side. During this time, the traveling carriage 6 does not come to the upper part of the front print medium 4a, and during this time, the front print medium 4a is carried out, a new print medium 4a is carried in, and the next printing is performed. Preparations can be made for or,
Similarly, during printing on the front printing medium 4a, the replacement of the rear printing medium 4b can be performed. As a result, the stop time of the traveling vehicle 6 can be significantly reduced.

The printing operation process in the second embodiment is shown by S2 in FIG.

FIG. 3 shows a flatbed offset printing press according to a third embodiment of the present invention. In this embodiment, a plurality of blanket cylinders (two in this example) 3a and 3b are provided for one printing plate surface plate 2, and
A printing platen 5 on which the same number of printing bodies 4 as the number of blanket cylinders 3 are placed is arranged in parallel on the front side of the printing platen 2, that is, on the side opposite to the blanket cylinder 3. The design is such that a picture can be transferred to the printing materials 4a, 4b on the board 5a or 5b.

In the third embodiment, the printing carriage 1 to which the ink is supplied from the ink supply device (not shown) by the travel of the traveling carriage 6 firstly causes one of the blanket cylinders 3a.
Is transferred onto the outer peripheral surface of the blanket cylinder 3b, and then from the plate 1 to which the ink has been supplied again onto the outer peripheral surface of the other blanket cylinder 3b. Then, the traveling carriage 6 is moved, and the blanket cylinder 3a is lowered corresponding to the printing platen 5a.
The picture is transferred to the printing medium 4a on the printing platen 5a. Next, the blanket cylinder 3b is lowered correspondingly to the printing platen 5b, and the picture is transferred to the printing medium 4b on the identification plate 5b. After a series of printing is completed as described above, the traveling carriage 6
To the original position and stop. In this state, the printing materials 4a and 4b are removed, and the next new printing materials 4a and 4b are removed.
After registration, the register, that is, the position of the printing medium 4 is set via a positioning device (not shown).

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

FIG. 3A shows a printing operation process according to this embodiment.
S3.

FIG. 4 shows a flatbed offset printing press according to a fourth embodiment of the present invention. In this embodiment, one printing plate base 2 and a plurality of blanket cylinders (two on this side) 3a, 3b corresponding to the printing plate base 2 are provided. 6, the number of blanks 4 provided on the same number as the number of blanket cylinders 3.
The printing platen 5a and 5c and 5c, 5d on which the blanket cylinder 3a is mounted on the printing plate 4 corresponding to the front and rear sides of the printing platen 2 at the time of printing. , 3b.

In the fourth embodiment, a pattern is transferred from the printing plate 1 to which ink has been supplied onto the outer peripheral surface of the blanket cylinder 3a by the travel of the traveling carriage 6, and then the printing plate 1 to which ink has been supplied again. Is transferred to the outer peripheral surface on the side of the blanket cylinder 3b. Subsequently, the traveling carriage 6 is moved, the blanket cylinder 3a is lowered corresponding to the printing platen 5a, the pattern is transferred to the printing medium 4a on the identification plate 5a, and then the blanket cylinder is corresponded to the printing platen 5b. 3b is lowered, and the picture is transferred to the printing medium 4b on the identification board 5b.

Thereafter, the traveling carriage 6 is moved backward to transfer the picture from the printing plate 1 to which the ink has been supplied onto the outer peripheral surface of the blanket cylinder 3a, and then the printing plate 1 to which the ink has been supplied again.
Is transferred to the outer peripheral surface on the side of the blanket cylinder 3b. This process is repeated as many times as necessary.

Subsequently, the traveling carriage 6 is moved backward, the blanket cylinder 3a is lowered in correspondence with the printing platen 5c, and the picture is transferred to the printing substrate 4c on the identification plate 5c, and then the printing platen 5d. Then, the blanket 3b is lowered, and the picture is transferred to the printing medium 4d on the identification board. This process is repeated as necessary. After a 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 distributed before and after the printing platen 2, the printing is performed on the printing materials 4c and 4d on the rear side. During this time, the traveling carriage 6 does not come to the upper part of the front printing materials 4a, 4b, and the front printing materials 4a, 4b arranged side by side during this time are unloaded, and a new printing material is loaded. Preparations for the next printing, such as registration, can be made. Similarly, during printing on the front-side printing members 4a and 4b, the rear-side printing members 4c and 4d arranged side by side can be replaced and replaced.

In addition, in this embodiment, two printing plates 5a, 5b and 5c, 5 are provided before and after the printing platen 2, respectively.
d, that is, since the print media 4a, 4b and 4c, 4d are provided, the print media 4a and 4b or 4c and 4d on each side arranged side by side can be collectively attached and detached. A series of indirect operations related to replacement of the printing medium 4 such as alignment (register) can be efficiently performed.

In addition, especially when large-size printing is performed, the traveling carriage 6 stays on one side of the printing platen 2 for a long time, so that a sufficient time for replacement of the printing medium 4 is required. There is also an advantage that can be multiplied.

FIG. 4 shows a printing operation process in this embodiment.
This is shown in S4 of (A).

The combination of the blank 4 and the blanket cylinder 3 corresponding to the printing medium 4, the printing order, etc.
Settings other than the fourth embodiment are also possible. Further, the present invention can be applied to various types of printing presses such as an intaglio printing press or a relief printing press, in addition to the offset printing press according to the above-described embodiment.

[0043]

The present invention is configured as described above.
According to the present invention, one or a plurality of blanket cylinders are arranged for one printing platen, and a plurality of printing platens on which a printing medium is placed are placed in front of the printing platen. , Rear, front and rear, so that a blanket cylinder can transfer a pattern to a plurality of printing media arranged in a row continuously or simultaneously. This makes it possible to reduce the ratio of the 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 according to the present invention, (a) a plurality of printing media can be collectively loaded and unloaded when replacing the printing media.

(A) During the printing operation, the replacement of the printing medium can be performed in parallel in time.

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

Thus, the attendant work time related to printing can be shortened, and the time required for printing on one printing medium can be shortened, whereby the productivity can be greatly improved.

[Brief description of the drawings]

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

FIG. 2 is an equivalent view of FIG. 1 showing a second embodiment of the present invention.

FIG. 3 is an equivalent view of FIG. 1 showing a third embodiment of the present invention.

FIG. 4 is an equivalent view of FIG. 1 showing a fourth embodiment of the present invention.

FIG. 5 is an equivalent view of FIG. 1 showing a conventional flatbed offset printing press.

FIG. 6 shows a first example of the vicinity of a traveling carriage in a conventional flatbed printing press.
FIG.

FIG. 7 is a side structural view showing a second example relating to the above.

FIG. 8 is a configuration diagram showing a schematic overall configuration of a conventional flatbed offset printing press.

FIG. 9 is a view taken in the direction of arrows ZZ in FIG. 8;

FIG. 10 is a detailed view of a printing roller mounting portion in a conventional flatbed offset printing press.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printing plate 2 Printing plate surface plate 3, 3a, 3b Blanket cylinder 4a, 4b, 4c, 4d Printed material 5a, 5b, 5c, 5d Printing surface plate 6 Traveling trolley 7 Ink roller 9 Mounting stand

Claims (4)

[Claims] An image is formed on a plate-shaped printing plate placed on a printing platen, and the image is temporarily transferred to an outer peripheral surface of a blanket cylinder provided on a carriage traveling in a printing direction. A flatbed printing machine configured to transfer the pattern onto a printing medium, wherein one printing plate surface plate and one blanket cylinder corresponding to the printing plate surface are provided; A plurality of printing platens on which the prints are placed are provided, and the plurality of printing platens are arranged in parallel on one side in front of or behind the printing platen plate, and the plurality of printing platens are arranged by the blanket cylinder. A flatbed printing machine characterized in that the pattern can be transferred to any one of the printing materials on a printing platen. 2. A pattern is formed on a plate-shaped printing plate placed on a printing platen, and the pattern is temporarily transferred to an outer peripheral surface of a blanket cylinder provided on a carriage traveling in a printing direction. A flatbed printing machine configured to transfer the pattern onto a printing medium, wherein one printing plate surface plate and one blanket cylinder corresponding to the printing plate surface are provided; A plurality of printing bases on which prints are respectively mounted are provided, and the plurality of printing bases are arranged on both front and rear sides of the printing plate base, and the plurality of printing bases are set by the blanket cylinder. A flatbed printing machine characterized in that the above-mentioned design can be transferred to any one of the printing objects on the board. 3. A pattern is formed on a plate-like printing plate placed on a printing platen, and the pattern is temporarily transferred to an outer peripheral surface of a blanket cylinder provided on a carriage traveling in a printing direction. A flatbed printing machine configured to transfer the pattern onto a printing medium, further comprising a single printing platen and a plurality of the blanket cylinders corresponding thereto,
A printing platen on which the same number of the printing bodies as the blanket cylinders are placed is arranged in parallel on one side in front of or behind the printing platen plate, and a plurality of printing platens are provided from the plurality of blanket cylinders. A flatbed printing machine characterized in that the above-mentioned pattern can be simultaneously transferred onto a printing medium. 4. A pattern is formed on a plate-shaped printing plate placed on a printing platen, and the pattern is temporarily transferred to an outer peripheral surface of a blanket cylinder provided on a carriage traveling in a printing direction. A flatbed printing machine configured to transfer the pattern onto a printing medium, further comprising a single printing platen and a plurality of the blanket cylinders corresponding thereto,
The printing platen on which the same number of the printing materials as the blanket cylinders are placed is disposed on both front and rear sides of the printing platen, and the plurality of blanket cylinders are used to cover a plurality of printing platens. A flatbed printing machine characterized in that said pattern can be simultaneously transferred to a printed body.