JPH02275Y2 - - Google Patents

Description

[Detailed explanation of the invention] Technical field This invention uses base paper peeled off from a rotating drum.
This invention relates to an automatic plate discharge device for a stencil printing machine that compresses and discharges the plate.

Conventional technology In general, in a stencil printing machine, the work of manually peeling off the used base paper without the edge paper from the rotating drum is unavoidable because the base paper is wrapped around the drum by the adhesive force of the ink, so the ink inevitably touches your hands or clothes. This is a highly disliked task as there is a risk of contamination.

For this reason, various automatic plate discharge devices have been devised to automatically peel off the used base paper from the rotating drum. FIG. 1 shows an example of this conventional automatic plate ejecting device, in which a claw member 1 is arranged close to a rotating drum 5, and its tip is positioned near the outer peripheral surface of the drum 5. Drum 5
With rotation, the claw member 1 enters between the base paper 2 and the drum 5, peels the base paper 2 from the drum 5, and then discharges the base paper into a discharge box by rollers 3 and 4 rotated by a drive device (not shown). It is something that has become popular.

However, in the conventional automatic plate discharge device as described above, it is not possible to equip a very large plate discharge box due to the demand for downsizing of printing machines, and the base paper is simply discharged into the plate discharge box 6. The problem was that it quickly filled up. For this reason, a method was adopted in which a large plate discharge box was installed on a special table under the paper output port of the printing machine, but it was not possible to automatically convey the discharged paper over a long path using this method. However, there were problems in that it was costly and trouble-prone. Furthermore, if the base paper is discharged into the master discharge box in a state in which it has been peeled off from the rotating drum, the ink on the base paper will stick to the entrance of the master discharge box, and the base paper will protrude far out of the box instead of entering. There was also the problem that the inside of the device was contaminated when the device was removed.

Purpose This invention was devised to solve the above-mentioned problems of the conventional automatic plate ejecting device, and by compressing the ejected base paper and ejecting it into the ejecting box, it can be stored in the ejecting box. It is an object of the present invention to provide an automatic plate discharge device for a stencil printing machine which improves efficiency and also ensures reliable discharge into a box.

Configuration This invention will be explained below based on the embodiment shown in the drawings.

In FIG. 2, the claw member 1, the front roller 3,
4. The rotating drum 5 is the same as the conventional one shown in FIG. The base paper 2 peeled off from the rotating drum 5 is sandwiched therebetween and discharged backward.

Behind the front rollers 3 and 4, another pair of rear rollers 8 and 9 are rotatably disposed and are pressed against each other by a spring 10 interposed between their respective rotating shafts. It is further rotated in the direction of arrow A by a drive device (not shown).

The positional relationship between the front rollers 3, 4 and the rear rollers 8, 9 is as shown in FIG. or 4, and as a result, a space 11 surrounded by rollers 3, 4, 8, and 9 is formed.

In the above-mentioned automatic master discharge device, when the rear rollers 8 and 9 are stopped, the base paper 2 adhered to the rotating drum 5 with ink is emptied by the operation of the claw member 1 and the front rollers 3 and 4 as described above. Sent into place 11. As shown in FIG. 4, the base paper 2 fed into this space 11 is pressed against the stopped rear rollers 8 and 9, and is folded and compressed in the transport direction of the base paper 2. Ru. After the used base paper 2 is completely pushed into the empty space 11 in this way, the rear rollers 8 and 9 are rotated in the direction of arrow A to discharge the compressed mass of base paper 2' into the master discharge box 12. do. At this time, the mass of base paper 2' is formed between the rear rollers 8 and 9 by tooth-shaped unevenness formed on the outer periphery of the rear rollers 8 and 9, and the convex portions are in contact with each other. It enters the plant and is further compressed before being discharged.

The above-mentioned automatic plate ejecting device is particularly effective for ejecting stencil sheets that do not have edges attached, and experiments have shown that used stencil sheets with a length of 450 mm without edges have a cross section of 10 x 10 mm or less. It has been found that it can be easily folded and compressed and accommodated in the cavity 11 of.

Effects As described above, with this invention, the used base paper without the edge paper that has been peeled off from the rotating drum is once compressed in the transport direction in the empty space, and then is discharged to the plate discharge box. Because
This has excellent effects in that the storage efficiency of the plate discharge box is improved and, moreover, the base paper is reliably discharged into the plate discharge box.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing a conventional automatic plate ejection device, Fig. 2 is a schematic side view showing an embodiment of this invention, and Fig. 3 is a plan view showing the positional relationship of two pairs of rollers in the same embodiment. , FIG. 4 is a side view showing the operating state of the same embodiment. 2... Base paper, 2'... Block of base paper, 3, 4... Front roller, 5... Rotating drum, 8, 9... Back roller, 11... Blank space, 12... Master discharge box.

Claims (1)

[Scope of Claim for Utility Model Registration] In an automatic plate discharge device of a stencil printing machine, in which the base paper with no edge paper peeled off from a rotating drum by a claw member is discharged backward by a pair of rollers that are pressed against each other. , a pair of rear rollers are arranged behind the pair of rollers to press against each other and prevent conveyance of the base paper discharged from the pair of rollers, thereby forming a space surrounded by these two pairs of rollers; After the base paper discharged by the front roller is compressed in the conveyance direction of the base paper in the space,
An automatic plate discharge device for a stencil printing machine, characterized in that the plate is discharged to the rear by rotation of a rear roller.