JPH0544534U - Pad printing machine - Google Patents

Abstract

(57) [Summary] [Purpose] Ink is applied to a specific printed pattern by installing an ink pot on a part of a printing plate on which a printed pattern is formed at a plurality of positions on the circumferential line. [Structure] A plurality of printing patterns 12 are formed at required intervals on a virtual circumferential line C of a printing plate 7 supported so as to be capable of intermittent rotation, and an ink pot 13 is installed at a part of this circumferential line, The transfer pad 5 is moved up and down at a position on the circumferential line outside the ink pot.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pad printing machine in which a plurality of printing patterns are formed on a printing plate.

[0002]

[Prior Art]

 As a means for supplying ink to the printing plate (intaglio plate) of a pad printing machine, an ink plate and doctor blade are provided on the ink plate on which the printing plate is installed. When the ink plate advances, the ink is carried onto the printing plate and the doctor blade is used. The type that scrapes off the excess ink when moving backward, and the lower end of the peripheral wall of the ink pot whose lower side is opened on the upper surface of the printing plate, as in Japanese Utility Model Laid-Open No. 54-16505 or Japanese Examined Patent Publication No. 3-6911. A type is used in which the ink in the ink pot is applied to the printing pattern on the printing plate in the required amount by placing it in pressure contact and moving the printing plate back and forth. However, in the latter type that uses the ink pot, since the ink is sealed in the ink pot, unlike the former type in which the ink tray is open, the evaporation of the solvent is reduced and the adjustment of the ink viscosity becomes unnecessary, and the work The environment will be improved.

However, in any of the above-mentioned forms, when changing the print design, it is necessary to remove the ink from the ink tray or ink pot and disassemble each part, so the setup work for the above change is required. Therefore, it becomes very inefficient when it is necessary to change the print design in a relatively short time, for example, when printing a large amount of a wide variety of products. Therefore, a pad printing machine of the type in which a plurality of printing patterns are formed on a printing plate and these patterns can be selected and used at any time has been proposed (JP-A-62-225347).

[0004]

[Problems to be solved by the device]

 By the way, as shown in FIG. 6 of the publication, in the apparatus disclosed in the above-mentioned Japanese Patent Laid-Open No. 225347/1987, the plate surface other than the fan-shaped portion sandwiched between two doctor blades facing each other is entirely covered with ink. This means that since the plate surface described above has multiple patterns and has a large area, it requires a large amount of ink, and work such as ink replacement and plate cleaning is required. Is complicated, and the structure that keeps close contact between the ink tray that houses the printing plate and the ink tray cover that is applied on top of it, or the doctor blade attachment section and the blade insertion port becomes complicated. And so on.

The present invention addresses the above-described inconvenience, and an object thereof is to apply the necessary ink only to a specific printing pattern of a printing plate having printing patterns at a plurality of positions.

[0006]

[Means for Solving the Problems]

 That is, the pad printing machine of the present invention is supported so as to be able to rotate intermittently, and at a proper position on the circumferential line of the printing plate on which a plurality of printing patterns are formed as required intervals on the virtual circumferential line on the upper surface. , An ink pot having an opening at the bottom is installed by pressing the lower end portion of the ink pot under pressure, and further, between the upper surface of another printing plate and the upper surface of the printing plate on the circumference where the ink pot of the printing plate is provided. Equipped with a transfer pad that moves back and forth and can move up and down at the position of this front and rear end, one of the above print patterns is transferred from below the ink pot by a rotating operation including reversal of the printing plate. It is characterized in that it is selectively located in the lower part of the.

[0007]

[Action]

 According to the present invention, when the printing plate is rotated at an appropriate angle including reversal, the ink is applied to the printed pattern that has passed under the ink pot in the printing plate. When the ink moves to the outside, excess ink is scraped off at the lower end of the ink pot, and the printing plate is rotated to bring the printed pattern below the transfer pad and the printing plate is stopped. The ink of the pattern is picked up and transferred to the printing material by the above-mentioned pad which moves downward and upward.

[0008]

[Embodiment] The present invention will be described below based on an embodiment shown in the drawings.

In the pad printer 1 shown in FIG. 1, the pad printer 1 has a substantially U-shaped main body frame 2, and an upper frame 2 a of the main body frame 2 has a front-back direction (left-right direction in FIG. 1). A support shaft 4 is hung from a slider 3 provided so as to be movable to, and an elastic transfer pad 5 is attached to the lower end of the support shaft 4. The transfer pad 5 is mounted on and fixed to the printing table 6 provided on the front part of the floor base 2b of the main body frame 2, and the forward end X indicated by the solid line on the printing target W 1 and the floor base 2b will be described later. The upper surface of the transfer pad 5 is moved back and forth between a retreat end Y indicated by a chain line on a horizontal disc-shaped printing plate 7, and the transfer pad 5 is moved up and down at each of the front and rear ends X and Y. It moves.

The printing plate 7 is mounted on the floor table 2b of the main body frame 2 on a rotary table 9 supported by a driving body 8 that performs an intermittent rotation operation including reversal, and a fixed block 10 provided around the rotary table 9. It is fixed by means of 10 and an adjusting push screw 11, and the installation position of the printing plate 7 on the floor base 2b is based on the rotation center of the driving body 8 as shown in FIG. An imaginary circumferential line C drawn on the upper surface of the printing plate 7 is set to be located immediately below the transfer pad 5 when it is moved to the retreat end Y.

On the circumferential line C of the printing plate 7, however, a plurality of (four in the example, a, b, c and d in the drawing) printed patterns 12 are formed at equal intervals by concave grooves. In addition, an ink pot 13 for applying ink to the printed pattern 12 is installed at other positions on the circumferential line C except the position directly below the transfer pad 5 at the retreat end Y in the plate 7. There is. The installation position of the ink pot 13 is a print pattern adjacent to the print pattern when one print pattern 12 is located immediately below the transfer pad 5 at the backward end Y as illustrated in FIG. It is preferable to set it at a position on the flat printing plate 7 which is intermediate between a and b) in FIG.

That is, in the pad printing machine 1 described above, when one printing pattern 12 (eg, a) on the printing plate passes below the ink port 13 by the rotation operation of the printing plate 7 by the rotary table 9, The ink in the ink pot 13 is applied to the concave groove of the printed pattern (a), and then the printed pattern (a) is moved to the retreat end Y by the rotational movement at a position directly below the transfer pad 5. When the printing plate 7 is stopped (state of FIG. 2), the transfer pad 5 is lowered and pressed against the printing plate 7, whereby the ink applied to the printing pattern (a) is transferred to the transfer pad 5 as described above. Transferred according to the printed pattern. The transfer pad 5 is printed on the material W to be printed by raising the transfer pad 5 and lowering it at the position where it has moved to the forward end X. Further, when the transfer pad 5 is moved, the printing pattern (a) is moved again below the ink pot 13 by rotating or reversing the printing plate 7. For this reason, inside the main body frame 2 described above, a movement mechanism such as a motor for driving the transfer pad 5 and the printing plate 7 at the above timing, a rotary cam, an air cylinder, and a link mechanism (none of which is shown) are provided. Has been done.

Further, the above-mentioned ink pot 13 has a cylindrical shape with upper and lower openings as shown in FIGS. 3 and 4, and the doctor blade 14 is fitted to the lower end surface in a protruding state, and the fitting is performed. The part is sealed by an O-ring 15 so that when the ink pot 13 is placed on the printing plate 7, an ink chamber 16 is formed in the pot. However, in the ink pot 13, a lid 17 is fitted on the upper portion of the ink chamber 16 and an ink flow suppressing plate 18 suspended by the lid 17 is provided in the ink chamber 16.

A support ring 19 is detachably fitted to the upper end of the ink pot 13, and both sides of the ring form a base portion that can swing up and down on the side portion of the main body frame 2. The pair of left and right support arms 21 and 21 attached to each pivot 20 are swingably attached by ball joints 22 and 22 at the tips. In that case, the left and right support arms 21, 21 individually move up and down, and the center of swing of the support ring 19 is a horizontal axis connecting the left and right ball joints 22, 22. The ink pot 13 is rotatably supported by penetrating the main body frame 2 and has a base portion attached to each shaft 25 by a shaft 24 which can be rotationally adjusted by an adjusting lever 23 on the outer side of the main body frame 2. Further, a pair of left and right movable arms 26 are rocked at their tip ends, and a spring 27 is interposed between the supporting arms 21 and 21, respectively, so as to apply pressure onto the printing plate 7.

In the pad printing machine 1 having the above structure, when the transfer pad 5 moves from the solid line position in FIG. 1 to the retreat end Y shown by the chain line and descends, a part of the printing pattern formed on the printing plate 7 ( When (a) moves below the ink pot 13 by the rotation of the printing plate 7 in the clockwise direction in FIG. 2 and immediately below the transfer pad 5 at the retreat end Y position, the printing plate 7 stops (FIG. 2). ). In this state, the ink of the print pattern (a) is transferred to the lowered pad 5, and then the pad 5 is raised and moved down to the forward end X at the solid line position, and the desired printing is performed on the printing medium W. Of. However, the transfer pad 5 on which this printing has been completed rises again and returns to the position indicated by the chain line.

When the printing plate 7 rotates clockwise in one direction, other printing patterns (b 1), (c), and (d) are also passed through below the ink pot 13 so that Ink is also applied to each design, but the inks of these other designs do not pass through the lower part of the transfer pad 5 and are not transferred to the pad, so that the printed design (a) is being used. Does not cause obstacles. If the printed pattern to be used next is coated with ink, the ink should be wiped off before use. Further, the printing plate 7 is rotated by a predetermined angle so that the transfer pad 5 is transferred, and then the printing plate 7 is inverted, so that the one printing pattern (a) is transferred to the ink pot 13. The transfer pad 5 and the transfer pad 5 may be alternately moved again. The above-mentioned operation is the same when using another printed pattern.

[0017]

[Effect of the device]

 As is apparent from the above description, the present invention forms a plurality of printing patterns on a printing plate adapted to perform a rotation operation including reversal at required intervals, and on the circumferential line through which the printing pattern of the printing plate passes. Since the ink pot is provided at the appropriate position, the work to change the pattern to be printed to another can be performed easily and quickly, and the ink is stored only in the ink pot. Therefore, unlike the conventional device that covers the entire upper surface of the plate except for the design with ink, it is easier to manage and wash, and the structure can be simplified.

[Brief description of drawings]

FIG. 1 is a side view of a pad printing machine according to the present invention.

FIG. 2 is a plan view showing the arrangement of the main parts.

FIG. 3 is a partially cutaway plan view of the same main part.

FIG. 4 is a side sectional view of FIG.

[Explanation of symbols]

 1 Pad Printing Machine 5 Transfer Pad 7 Printing Plate 12 (a) (b) (c) (d) Printed Pattern 13 Ink Pot C Virtual Circular Line W W Printed Material

Claims (1)

[Scope of utility model registration request] 1. A downward opening is provided at an appropriate position on the circumferential line of a printing plate which is supported so as to be capable of intermittent rotation and has a plurality of printing patterns formed on the virtual circumferential line of the upper surface as required intervals. The ink pot is set by pressing the lower end of the ink pot, and the ink pot is moved back and forth between the other upper surface of the printing plate on the circumference line of the printing plate on which the ink pot is provided and the printing object. It is equipped with a transfer pad that can be moved up and down at the position of the front-back movement end, and one of the printing patterns is selectively moved from the lower part of the ink pot to the lower part of the transfer pad by the rotation operation including the reversal of the printing plate. A pad printing machine characterized by being positioned.