JP2000052530A - Press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press which can perform an intermittent printing medium feeding type printing even when a mesh type plate cylinder is used and exhibits excellent practical use. SOLUTION: An intermittent printing medium feeding type press constituted in such a way that a printing medium 3 such as a paper, a film and a label is pinched between a cylindrical plate cylinder 1 and a cylindrical impression cylinder 2 and the above described printing medium 3 is printed by rotating the plate cylinder 1 and the impression cylinder and normal feeding and reverse feeding of this printing medium 3 are repeatedly performed, is provided and it is constituted in such a way that a cutout part 4 is provided on the impression cylinder 2 and when this cutout part 4 is positioned on the plate cylinder 1 side and the printing medium 3 is brought into non-contact with the plate cylinder 1, the printing medium 3 is reversely carried.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus of an intermittent printing medium feeding type which prints a printing material such as a label sticker while repeating forward and backward feeding of the printing medium.

[0002]

2. Description of the Related Art When printing a label design 8 continuously on a printing medium 3 such as a wound label paper with release paper, the distance between the label designs 8 should be as small as possible. In order to eliminate the waste of the print medium 3 by making it narrow, printing is performed when the print medium 3 is sequentially fed, and the label pattern 8 is printed. Then, the print medium 3 is slightly fed back. There is an intermittent printing medium feeding type printing method which repeats the process of performing printing by feeding 3 sequentially.

The printing mechanism of the printing apparatus used in the intermittent printing medium feeding type printing method is, as shown in FIG.
It comprises a cylindrical plate cylinder 31 for printing a label design on a print medium 30 and a cylindrical impression cylinder 32 for holding the print medium 30 in a pressed state with the plate cylinder 31. A configuration is provided in which a notch 33 extending in the length direction of the plate cylinder 31 (a direction orthogonal to the feed direction of the print medium 30) is provided, and a pressing mechanism for pressing the print medium 30 against the impression cylinder 32 is employed. ing.

When printing is performed by this printing apparatus, when the rotating plate cylinder 31 is in contact with the impression cylinder 32, the printing medium 30 is sequentially fed and printing is performed. Notch 33
When the printing medium 30 is located on the impression cylinder 32 side, the printing medium 30 and the plate cylinder 31 are not in contact with each other, so that printing is not performed and the printing medium 30 can be fed back.

[0005] Recently, as a plate cylinder for screen printing capable of thickly depositing ink, as shown in FIG. 2, a label design portion is provided on the surface of the plate cylinder 1 with a mesh having a hole diameter of about 100 μm. A plate cylinder 1 of a type that prints a label design by oozing ink from a label design portion is commercially available (hereinafter, referred to as a mesh type plate cylinder).

In this mesh type plate cylinder 1, as shown in FIG. 3, a spatula member 7 which comes into contact with the inner peripheral wall of the outer cylinder 9 is provided in an outer cylinder 9 of a cylindrical rotatable surface mesh. The ink is supplied to the spatula member 7 by an appropriate ink supply mechanism 10.
The ink is supplied to the tip, and the outer cylinder 9 is rotated so that the spatula member 7 allows the ink to ooze onto the surface of the outer cylinder 9 via the outer cylinder 9.

Accordingly, the mesh type plate cylinder 1 is
Since the tip of the non-rotating spatula member 7 must contact the inner peripheral wall of the outer cylinder 9 which rotates 360 °, if the cylindrical outer cylinder 9 cutout is inevitably provided, ink application by the spatula member 7 becomes impossible. Therefore, the intermittent printing medium feed printing cannot be performed, and the printing medium 3 is eventually wasted.

The present invention solves the above problems,
An object of the present invention is to provide a highly practical printing apparatus capable of performing intermittent printing medium feeding type printing even when a mesh type plate cylinder is used.

[0009]

The gist of the present invention will be described with reference to the accompanying drawings.

A printing medium 3 such as paper, a film or a label is sandwiched between a cylindrical plate cylinder 1 and a cylindrical impression cylinder 2, and the printing medium 3 is rotated by rotating the plate cylinder 1 and the impression cylinder 2. An intermittent printing medium feeding type printing apparatus which is configured to perform printing, and in which forward and backward feeding of the printing medium 3 is repeatedly performed, a notch 4 is provided in the impression cylinder 2, and the notch 4 The printing apparatus according to the present invention, wherein the printing medium 3 is configured to be fed back when the printing medium 3 and the plate cylinder 1 are located in a non-contact state on the cylinder 1 side. is there.

Further, in the printing apparatus according to the first aspect,
The plate cylinder 1 has a configuration in which small holes are scattered on the surface.
And a spatula member 7 is provided in the plate cylinder 1 to contact the inner peripheral wall of the plate cylinder 1, and the ink supplied by the spatula member 7 is supplied to the surface of the plate cylinder 1 through the small holes. The present invention relates to a printing apparatus characterized in that the printing apparatus is configured to bleed from the printing apparatus.

Further, in the printing apparatus according to any one of claims 1 and 2, the printing medium 3 is always pressed against the impression cylinder 2 and the printing medium 3 is always given a predetermined tension. The present invention relates to a printing apparatus provided with a prevention mechanism 5.

Further, in the printing apparatus according to any one of claims 1 and 2, printing rollers are provided before and after a printing mechanism composed of a plate cylinder 1 and an impression cylinder 2 so that a printing medium is provided. The present invention relates to a printing apparatus characterized in that the printing medium 3 is constantly pressed against the impression cylinder 2 and a predetermined tension is always applied to the printing medium 3.

Further, in the printing apparatus according to the fourth aspect,
The impression cylinder 2 is provided with a cam mechanism 6 and lift rollers 5a and 5a.
b is connected to the cam mechanism 6, and the lift rollers 5a and 5b are moved up and down in conjunction with the rotation of the impression cylinder 2 by the cam mechanism 6 so that the printing medium 3 is constantly pressed against the impression cylinder 2 and The present invention relates to a printing apparatus characterized in that a predetermined tension is always applied to the print medium 3.

[0015]

When the notch 4 of the impression cylinder 2 is located on the plate cylinder 1 side, the printing medium 3 is not sandwiched between the plate cylinder 1 and the impression cylinder 2, and the printing medium 3 and the plate cylinder 1 are not sandwiched. Is in a non-contact state, so that the printing medium 3 can be easily fed back.

Since the present invention is configured as described above, for example, an intermittent printing medium feeding printing can be performed even if a mesh type cylindrical plate cylinder is used, and the printing apparatus is excellent in practicality.

[0017]

2 to 7 show one embodiment of the present invention, which will be described below.

In this embodiment, a printing medium 3 such as paper, a film or a label is sandwiched between a cylindrical plate cylinder 1 and a cylindrical impression cylinder 2, and the plate cylinder 1 and the impression cylinder 2 are rotated. The print medium 3
When the print medium 3 is sequentially fed, a print pattern 8 is printed on the print medium 3, the print medium 3 is slightly fed back, and then the print medium 3 is returned again. Is a printing apparatus of an intermittent printing medium feeding type which continuously prints the print symbol 8 by repeating a process of printing the print symbol 8 on the print medium 3 by successively feeding the print cylinder 3. 2, a notch 4 extending in the length direction (a direction orthogonal to the feed direction of the print medium 3) is provided, and the notch 4 of the impression cylinder 2 is located on the plate cylinder 1 side so that the print medium 3 and the plate cylinder 1 Is configured to perform reverse feeding of the print medium 3 when a non-contact state occurs.

The plate cylinder 1 has a structure in which small holes of about 100 μm are scattered in a mesh form on the surface of the plate cylinder 1, and is used for screen printing provided with a printed design portion by the small holes. As shown in FIG. 3, a spatula member 7 is provided in a cylindrical rotatable outer cylinder 9 to be in contact with the inner peripheral wall of the outer cylinder 9, and ink is supplied by an ink supply mechanism 10 formed by a tube and a nozzle. The ink is supplied to the tip of the spatula member 7 and the outer cylinder 9 rotates, whereby the ink is
Are sequentially pressed against the inner peripheral wall of the outer cylinder 9 through the outer cylinder 9.
The ink is configured to ooze out of the printed pattern on the surface.

At the front and rear (in the feeding direction of the print medium 3) both ends of the notch 4 provided on the impression cylinder 2, convex portions 11 having a curved arc shape are provided. Of the print medium 3 can be smoothly performed.

The printing medium 3 is placed on the front side (in the direction of supply of the printing medium 3) and on the rear side (in the forward direction of the printing medium 3) of the printing mechanism composed of the plate cylinder 1 and the impression cylinder 2. The lifting and lowering rollers 5a and 5b are provided so as to be constantly pressed and always apply a predetermined tension to the printing medium 3 to prevent slack.

A cam mechanism 6 is provided at the left end and the right end of the impression cylinder 2, and the elevating rollers 5a and 5b are connected to the cam mechanism 6, and the elevating rollers 5a and 5b are pressed by the cam mechanism 6. The print medium 3 is raised and lowered in conjunction with the rotation of the cylinder 2, and the printing medium 3 is moved by the lifting and lowering movement of the lifting rollers 5 a and 5 b.
The printing medium 3 is always kept in a pressed state, and a predetermined tension is constantly applied to the printing medium 3 to prevent slack.

The intermittent printing medium feeding type printing method in this embodiment will be described below in detail with reference to FIG. During printing, the plate cylinder 1 is rotated at a constant speed.

First, in FIG. 6A, the printing medium 3 is held between the plate cylinder 1 and the impression cylinder 2 by the rotation of the impression cylinder 2 (and the plate cylinder 1). 3
Are sequentially fed, and printing on the print medium 3 is started. In addition, in the state of FIG. 6A, the front elevating roller 5a is at a position moved upward, and the rear elevating roller 5b is at a position moved downward. In addition, when printing is started from a state where the rotation of the impression cylinder 2 is slightly advanced from the state shown in FIG. 6A, it is possible to perform favorable printing with less occurrence of a displacement of the print symbol 8 and the like.

Subsequently, in FIG. 6B, even in this state, the printing medium 3 is sequentially fed, and printing is performed on the printing medium 3. In this state, the lifting rollers 5a and 5a
b does not move.

Subsequently, in FIG. 6C, the print medium 3
Is terminated between the plate cylinder 1 and the impression cylinder 2, and printing on the print medium 3 is terminated. Further, in order to prevent the print medium 3 from sagging, the cam mechanism 6 starts the downward movement of the front elevating roller 5a, and the print medium 3 is pressed against the impression cylinder 2 and the print medium 3 is appropriately pressed. The slack due to the application of the tension continues to be prevented (the slack of the print medium 3 causes a positional shift of the print symbol 8 and an accuracy error in the reverse feeding of the print medium 3). 6C, the rotation of the impression cylinder 2 is slightly advanced (by the rotation of the impression cylinder 2, the notch 4 of the impression cylinder 2 is positioned on the plate cylinder 1 side and the printing with the plate cylinder 1 is performed). (When the medium 3 comes into a non-contact state)
Is started.

Subsequently, in FIG. 6D, the print medium 3
Is transported backward, and the front elevating roller 5a is
The print medium 3 is moved to the lowest position to prevent the slack, and the state where the print medium 3 is pressed by the impression cylinder 2 is maintained. Further, the rear elevating roller 5b also starts descending movement, thereby preventing the print medium 3 that moves upward from the state shown in FIG. 6D from sagging and pulling together with the front elevating roller 5a.

Subsequently, with the rotation of the impression cylinder 2, the front elevating roller 5a rises again, and the rear elevating roller 5b descends again, and the state of each part returns to the state of FIG. .
Before returning to the state of FIG. 6A, the sequential feeding of the print medium 3 is restarted.

As described above, in this embodiment, the lifting roller 5
The print medium 3 is constantly pressed against the impression cylinder 2 by a.5b, and a predetermined tension is applied to the print medium 3 to perform printing on the print medium 3 without slack, and the print medium 3 is fed back. ing. In order to obtain such an effect, not only the elevating rollers 5a and 5b but also an elevating body, for example, can be used.

Thereafter, the above printing process is continued, and the printed symbols 8 are continuously printed on the print medium 3.

Since the present embodiment is constructed as described above, it is possible to perform intermittent printing medium feeding printing even when using a mesh type plate cylinder 1 capable of performing screen printing. Device.

Further, since the printing medium 3 is constantly pressed against the impression cylinder 2 by the elevating roller 5 which moves up and down, the printing medium 3 does not sag due to the forward or backward feeding of the printing medium 3, and the printing pattern is not printed. This makes the printing apparatus more practical without problems such as displacement of 8 and printing position displacement.

The lifting and lowering movement of the raising and lowering roller 5 for exhibiting the action of preventing the printing medium 3 from sagging is performed in conjunction with the rotation of the impression cylinder 2. This eliminates the need for mechanical programming or the like for preventing the print medium 3 from sagging, and makes the printing apparatus more practical.

In general, the plate cylinder 1 and the impression cylinder 2 are rotated by gear portions 12 provided on both right and left sides of the plate cylinder 1 and the impression cylinder 2, and the gear portion 12 is rotated at an appropriate speed. The rotation speed of the plate cylinder 1 and the impression cylinder 2 is set by electric control of a rotation mechanism for rotating the cylinder. Accordingly, the set printing length can be made the same, so that stable and reliable printing without a printing position shift of the printing symbol 8 can be performed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a main part of a conventional printing apparatus.

FIG. 2 is an explanatory perspective view showing an example of a plate cylinder 1 of a mesh type.

FIG. 3 is an explanatory diagram illustrating a main part of the present embodiment.

FIG. 4 is an explanatory front view of the present embodiment.

FIG. 5 is an explanatory side view of the present embodiment.

FIG. 6 is an explanatory diagram showing an operation of a main part of the embodiment.

FIG. 7 is an example of a printed product manufactured by an intermittent printing medium feeding type printing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plate cylinder 2 Impression cylinder 3 Print medium 4 Notch 5 Print medium slack prevention mechanism 5a / 5b Elevating roller 6 Cam mechanism 7 Spatula member

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Makoto Nitta 1300 Inokoba Nitta, Sakae-cho, Minami-Kamabara-gun, Niigata Inside Sanjo Machinery Co., Ltd. 1300 field F term in Sanjo Machine Works, Ltd. (reference) 2C034 AC14 AD06 AD08 AD11 2C035 AA11 FA09 RA08 RA11 RA25 RA37 2C250 DB15 EA07 EA18 EA27 EA33 EA34 EA43 3E095 CA02 DA76 FA30

Claims (5)

[Claims] 1. A printing medium such as paper, a film, or a label is sandwiched between a cylindrical plate cylinder and a cylindrical impression cylinder, and the printing medium is printed by rotating the plate cylinder and the impression cylinder. An intermittent printing medium feeding type printing apparatus in which the printing medium is sequentially and continuously fed back, wherein a notch is provided in an impression cylinder, and the notch is located on a plate cylinder side, and the printing medium is provided. A printing device configured to perform reverse feeding of the printing medium when the printing medium and the plate cylinder are brought into a non-contact state. 2. The printing apparatus according to claim 1, wherein the plate cylinder has a configuration in which small holes are scattered on the surface, and the plate cylinder abuts on the inner peripheral wall of the plate cylinder. A printing apparatus comprising a spatula member, wherein the ink supplied by the spatula member is oozed from the surface of the plate cylinder through the small hole. 3. The printing apparatus according to claim 1, wherein the printing medium is always pressed against the impression cylinder and a print medium slack preventing mechanism for constantly applying a predetermined tension to the printing medium is provided. A printing device, comprising: 4. The printing apparatus according to claim 1, wherein an elevating roller is provided before and after a printing mechanism composed of a plate cylinder and an impression cylinder, so that the printing medium is constantly applied to the impression cylinder. A printing apparatus which is configured to be in a pressed state and to constantly apply a predetermined tension to the print medium. 5. The printing apparatus according to claim 4, wherein the impression cylinder is provided with a cam mechanism, and the elevating roller is connected to the cam mechanism, and the elevating roller is interlocked with the rotation of the impression cylinder by the cam mechanism. A printing apparatus characterized in that a printing medium is constantly pressed against an impression cylinder by moving up and down and a predetermined tension is always applied to the printing medium.