JPH0444378Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a direct printing device that prints on a workpiece using a stamp such as a rubber stamp, and particularly relates to an improvement of its stamp pad mechanism.

[Conventional technology]

FIG. 2 is a schematic side view showing the main parts of an example of a conventional direct printing device.

In this direct printing device 2, the lever 4 with the rubber stamp 6 is pressed against the arrow A on the fixed stamp pad 8.
The lever 4 moves up and down as shown in FIG. Up and down, print material 1
4 is configured to perform predetermined printing.

Moreover, during that time, ink is uniformly supplied from a group of rollers represented by roller 12 to the surface of the ink roller 10, and the ink roller 10 is caused to reciprocate by rolling over the surface of the stamp pad 8 as shown by arrow D, thereby performing the printing operation. The stamp pad 8 is configured to be supplied with new ink every time.

[Problem that the invention attempts to solve]

However, in such a direct printing device 2, it takes a certain amount of time for the above-mentioned reciprocating motion of the ink roller 10, which has been a factor in hindering the increase in the printing speed of the device.

Therefore, the object of this invention is to provide a direct printing device that can increase printing speed by improving this point.

[Means for solving problems]

The direct printing device of this invention includes first and second pulleys rotatably supported on a pulley stand at predetermined intervals and parallel to each other, a belt-shaped stamp pad stretched between both pulleys, and a first pulley. an ink roller disposed above and parallel to the pulley and supplying ink to the surface; a first driving device for rotating the ink roller; and an upper stamp pad between the first pulley and the second pulley. a cradle provided below the cradle, a stamp pedestal with a mark attached to its lower surface, and a second drive for raising and lowering the stamp pedestal at least so that the mark comes into contact with and moves away from the stamp pad on the cradle. Using the device and the second pulley side of the pulley stand as a fulcrum, the first pulley side is raised and lowered so that the stamp pad on the first pulley comes into contact with or separates from the ink roller in accordance with the raising and lowering of the marking stand. and a third drive device.

〔Example〕

FIG. 1 is a schematic side view showing the main parts of a direct printing device according to an embodiment of this invention, with A showing the state where the marking stand is at the highest position and B showing the state where the marking stand is at the lowest position. show.

In this direct printing device 22, a first pulley 36 and a second pulley 38 are rotatably supported on a pulley stand 34 at a predetermined interval and parallel to each other. A belt-shaped stamp pad 28 is stretched between both pulleys 36 and 38. The width of this stamp pad 28 is greater than the width of a rubber stamp 26, which will be described later.

An ink roller 30 is provided above and parallel to the pulley 36, and the ink roller 30 is continuously rotated, for example, as indicated by arrow E, by a first drive device (not shown).
Further, on the surface of the ink roller 30, the roller 3
Ink is uniformly supplied from the roller group represented by 2.

On the other hand, a holder 40 larger than the rubber stamp 26 is provided below the upper stamp pad 28 between the pulleys 36 and 38 in order to prevent the stamp pad 28 from deflecting when the rubber stamp 26 comes into contact with it. In the illustrated example, there is a stamp stand 24 above which a rubber stamp 26 is attached to the bottom surface.
is located. This marking stand 24 is attached to a second drive device 42 .

The driving device 42 can move the stamp stand 24 up and down, as shown by arrow H, above the stamp pad 28 on the holder 40 so that the rubber stamp 26 comes into contact with or moves away from the stamp pad 28. Furthermore, in this example, the drive device 42 is also capable of transversely rectilinearly moving or pivoting the marking platform 24 onto a substrate (not shown) and then raising and lowering it for printing operations.

Further, a third drive device 44 is connected to the first pulley 36 side of the pulley stand 34, so that the first pulley 44 is driven with the second pulley 38 side as a fulcrum, as shown by arrow J. 36 side, the stamp pad 28 on the pulley 36 comes into contact with the ink roller 30 (the state shown in FIG. 1A) or moves away from it (the state shown in FIG. I try to raise and lower it like this.

To explain the overall operation example of this direct printing device 22, first, as shown in FIG.
4 is at the highest position, the pulley 36 side is also at the highest position, and the stamp pad 28 contacts the ink roller 30 and is thereby rotated in the direction of arrow G.
New ink is supplied from 0.

Next, when the marking stand 24 is lowered from the position above the receiving stand 40, the pulley 36 side is also lowered in synchronization with the lowering of the marking stand 24.
As shown in FIG. 1B, the rubber stamp 26 comes into contact with the stamp pad 28. On the way, there is a gap P between the ink roller 30 and the stamp pad 28.
occurs, thereby stopping the rotation of the stamp pad 28. By the way, if the rubber stamp 26 is brought into contact with the stamp pad 28 while it is still rotating, the two will rub against each other and cause uneven ink, but in this example, as mentioned above, the rotation of the stamp pad 28 stops before that happens, so the ink is stamp pad 28
The rubber stamp 26 is evenly supplied from the rubber stamp 26.

Then, when the marking stand 24 is raised again, the pulley 3
The 6th side also rises in synchronization with this, resulting in the state shown in FIG. 1A. Then, the marking stand 24 is moved onto the object to be printed and raised and lowered there to perform printing. During this time, the stamp pad 28 is rotated by the ink roller 30 by the length L of the rubber stamp 26 or more.

Thereafter, by repeating the same operation, printing is performed while constantly supplying new ink to the rubber stamp 26 from the stamp pad 28.

In this way, the direct printing device 22 is completely different from the conventional method of supplying ink to a fixed ink pad 8 by the reciprocating motion of the ink roller 10, and the belt-shaped stamp pad 28 is placed on the printing base 24.
Since the stamp pad 28 is moved intermittently according to the rise and fall of the stamp pad 28, there is almost no restriction on the printing speed from the surface that supplies ink to the stamp pad 28. As a result, the printing speed can be increased, for example, about twice as fast as the conventional printing speed.

In order to raise and lower the pulley 36 side in accordance with the raising and lowering of the marking stand 24, the drive devices 42 and 44 may be synchronized by electrical means, or they may be interlocked by mechanical means. Also good. In the latter case, the drive source for raising and lowering the marking stand 24 and the drive source for raising and lowering the pulley 36 side may be shared.

[Effect of idea]

As described above, according to this invention, a belt-shaped rotary stamp pad is used in place of the conventional fixed stamp pad, so that printing speed can be increased. Of course, since the rotation of the stamp pad is stopped when ink is supplied from the stamp pad to the mark, uneven ink does not occur.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing the main parts of a direct printing device according to an embodiment of this invention, with A showing the state where the marking stand is at the highest position and B showing the state where the marking stand is at the lowest position. show. FIG. 2 is a schematic side view showing the main parts of an example of a conventional direct printing device. 22... Direct printing device according to the embodiment, 2
4... Stamp stand, 26... Rubber stamp, 28... Stamp pad, 30... Ink roller, 34... Pulley stand, 36... First pulley, 38... Second pulley, 40... Rest, 42 ...second drive device,
44...Third drive device.

Claims (1)

[Scope of utility model registration request] The 136th and 238th pulleys are supported rotatably and parallel to each other on the pulley stand 34 at predetermined intervals, the belt-shaped stamp pad 28 is stretched between both pulleys, and the stamp pad 28 is placed above the first pulley. An ink roller 30 that is provided in parallel and supplies ink to the surface, a first drive device that rotates the ink roller, and an ink roller that is provided below the upper stamp pad between the first and second pulleys. A second driving device 42 that raises and lowers at least the stamp pad on the cradle so that the mark comes into contact with and moves away from the stamp pad on the cradle. Then, using the second pulley side of the pulley stand as a fulcrum, the first pulley side is raised and lowered so that the stamp pad on the first pulley comes into contact with and separates from the ink roller in accordance with the raising and lowering of the stamping stand. 3. A direct printing device comprising: 3 drive devices 44.