JPS6154708B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a conveying device for a sheet-like original such as a stencil paper or an offset printing original, and in particular, it is incorporated into a plate discharge device of a printing device and is removed from a plate cylinder. This relates to a transport device that transports used original plates for disposal.

BACKGROUND OF THE INVENTION In stencil printing devices and offset printing devices, various plate discharge devices have been proposed that automatically remove a used sheet-like master from a plate cylinder and dispose of it. It includes a conveying device for conveying the used master plate removed from the cylinder for disposal.

The original plate used for stencil printing or offset printing, especially the stencil paper, is a very thin, soft, so-called weak sheet, and one side of the used original plate is covered with viscous ink for printing over almost the entire surface. Because of the adhesion, it is difficult to convey this using either hook-type or friction-resistance type conveyance methods, especially in the case of headless originals that do not have reinforcing paper strips at the attachment point to the plate cylinder. Transporting it becomes even more difficult.

OBJECTS OF THE INVENTION An object of the present invention is to provide an improved frictional resistance type conveying device that can overcome the difficulty of conveying used original plates and reliably convey used original plates.

Structure of the Invention According to the present invention, the above-mentioned object includes a rotatably provided driven feed roller, and an elastic drive feed roller that is rotatably provided and rotationally driven by a drive device, A portion of the peripheral portion of the drive feed roller is removed, and when the removed portion is in a rotational position facing the driven feed roller, a gap is created between the drive feed roller and the driven feed roller to receive the original, and the remaining peripheral portion is When in a rotational position facing the driven feed roller, the peripheral portion presses into engagement with the driven feed roller to sandwich the base paper between the peripheral portion and the driven feed roller. This is achieved by using an original conveying device such as the one shown in FIG.

Effects of the Invention According to this configuration, when the removed portion of the peripheral portion of the drive feed roller faces the driven feed roller, a sufficient gap is created between the drive feed roller and the driven feed roller to receive the original. The used original plate, which has been removed from the plate cylinder during this period, is fed into this gap, after which the driving feed roller rotates and the remaining peripheral portion presses into engagement with the driven feed roller. The drive feed roller and the driven feed roller work together to pinch the original to ensure that it is held between them, and as a result, the original is reliably bitten between the drive feed roller and the driven feed roller, and the original is fed by the drive. As the roller rotates, it is reliably conveyed due to the frictional resistance with the drive feed roller.

If the circumferential portion of the driving feed roller always engages with the driven feed roller, the driving feed roller should not push the driven feed roller so much so that the original can bite between the driving feed roller and the driven feed roller. Although it is impossible to engage with pressure,
As in the conveying device of the present invention, when the peripheral portion of the drive feed roller intermittently experiences frictional resistance against the driven feed roller, as described above, a phenomenon occurs between the drive feed roller and the driven feed roller during non-pressing differential engagement. Since it can be received in the gap between the two, it is possible to set a large pressing force of the driving feed roller against the driven feed roller, and as a result, when the driving feed roller is engaged with the driven feed roller, The frictional resistance between the original plate held between the rollers and the drive feed roller becomes large, and the original plate can be transported reliably by the frictional resistance.

The peripheral surface of the drive feed roller preferably has a large friction coefficient in order to increase the frictional resistance with the original plate, and the drive feed roller preferably has a peripheral surface made of a material such as sponge or foamed synthetic resin. Preferably.

DESCRIPTION OF EMBODIMENTS The invention will now be described in detail by way of embodiments with reference to the accompanying drawings.

1 to 4 show one embodiment of an original conveying device according to the present invention. In these figures, numeral 1 indicates a stencil paper storage box, which has a stencil paper intake port 2 on the front and a stencil paper discharge port 3 on one side.

A drive shaft 5 carrying a plurality of gears 4 and a rubber roller 6 are provided in the stencil paper intake port 2 of the stencil paper storage box 1, each parallel to the axis of a plate cylinder (not shown). 6 are engaged with each other, and the used stencil sheet S is removed from the plate cylinder by the drive shaft 5 being rotationally driven in the counterclockwise direction in the figure by an electric motor (not shown). It is designed to be carried into a stencil paper storage box 1.

The device for removing the stencil paper attached to the plate cylinder and transporting it into the stencil paper storage box 1 was developed by the same applicant as the applicant of this application.
No. 179595 (Utility patent application No. 17959-95868) and Utility patent application No. 1983-
This device has already been proposed in Japanese Utility Model Application No. 97030 (Kokai No. 58-3266), and if a more detailed explanation of this device is required, please refer to the specification and drawings of the above-mentioned application.

A pair of metal rollers 7 and rubber rollers 8 are provided in the stencil paper outlet 3 of the stencil paper storage box 1 in a direction perpendicular to the axis of the plate cylinder, and the metal rollers 7 and the rubber rollers 8 are not engaged with each other. At the same time, the stencil paper stored in the stencil paper storage box 1 is discharged to the outside of the stencil paper storage box 1.

The stencil paper storage box 1 incorporates a conveying device according to the present invention. This conveyance device has a metal driven feed roller 10 disposed at the bottom of a stencil paper storage box 1 in parallel with a metal roller 7 and a rubber roller 8 and spaced apart from each other. Each of the driven feed rollers 10 is rotatably provided around its axis by a shaft 11, and the peripheral portion of each of the driven feed rollers is inserted into the stencil sheet through an opening 12 provided at the bottom of the storage box 1. It is exposed inside Box 1.

There is a shaft 11 at the top (ceiling part) of the stencil paper storage box 1.
It is rotatably provided around the axis by a shaft 13 parallel to , and is driven to rotate clockwise in the figure by an electric motor (not shown). The driving feed roller 14 has a semi-cylindrical shape, that is, a semi-cylindrical shape, with approximately half of its circumferential portion removed, and the remaining surface portion of the circumferential portion is elastic and has a surface texture similar to a sponge or foamed synthetic resin. The elastic member 15 has a high coefficient of friction. In the illustrated embodiment, the drive feed roller 14 is divided into two parts in the axial direction, and has a gap 16 at the center thereof in the axial direction. Two openings 17 are provided in the ceiling wall of the stencil paper storage box 1 to receive each of the divided drive feed rollers 14. A bridge 18 formed by the ceiling wall left between the two openings 17 is provided between the two openings 17 to prevent the stencil atoms from wrapping around the circumferential surface of the drive feed roller 14. It's summery.

As shown in FIGS. 1 to 3, the drive feed roller 14 moves the driven feed roller 10 inside the stencil paper storage box 1 when its circumference removal portion is in the rotational position facing the driven feed roller 10. A gap A (see Figure 2) which is large enough to receive the stencil paper is made between When the member 15 is in the rotational position facing the driven feed roller 10, the elastic member 15 pinches the stencil paper and presses into engagement with the driven feed roller 10.

Next, the operation of the apparatus constructed as described above will be explained.

The stencil sheet S that is removed from a printing cylinder (not shown) is held between a gear 4 and a rubber roller 6, and is held on a shaft 5.
As shown in the figure, the stencil sheet is carried into the stencil storage box 1 as it rotates counterclockwise. The movement of the stencil paper S carried into the stencil paper storage box 1 is restricted by the wall surface of the storage box, so that the stencil paper S is folded into a corrugated shape as shown in FIG. be done. At this time, as shown in FIGS. 1 to 3, the drive feed roller 14 faces the driven feed roller 10 at its circumferential removal portion, and receives the stencil paper S between it and the driven feed roller 10. Since a sufficiently large gap A is created, the stencil paper S is carried into the stencil paper storage box 1 without being obstructed by the driven feed roller 14, and a part of it is carried into the stencil paper storage box 1 by the driven feed roller 10.
and the drive feed roller 14.

When all of the stencil sheets S are carried into the stencil sheet storage box 1, the driving feed roller 14 is driven to rotate clockwise in the figure by an electric motor (not shown). As a result, as shown by the imaginary line in FIG. 2 and in FIG. The stencil paper S between the roller 10 and the driving feed roller 14
The stencil sheets are compressed and folded in a superposed state, and are conveyed within the stencil paper storage box 1 toward the stencil paper discharge port 3 by frictional resistance with the elastic member 15. The stencil paper S, which has been compressed and folded in a polymerized state, becomes relatively hard due to the folding and polymerization, and the stencil paper S conveyed to the stencil paper transport port 3 is further processed by a metal roller 7 and a rubber roller 8. The stencil sheet is held and discharged out of the stencil storage box 1 as the metal roller 7 rotates counterclockwise in the figure.

FIG. 5 shows another embodiment of the original conveying device according to the present invention. In addition, in Figure 5, the first
Components that are the same as those shown in FIGS. 4 to 4 are designated by the same numbers. In this embodiment, the drive feed roller 14 has approximately one quarter of its circumference removed.

In this embodiment as well, when the peripheral removed portion of the drive feed roller 14 is in the rotational position opposite to the driven feed roller 10, the gap between the driven feed roller 10 and the drive feed roller 14 is large enough to receive the stencil paper. A gap A is created for which the drive feed roller 1
When the remaining peripheral portion of No. 4 is in the rotational position facing the driven feed roller 10, the elastic member 15 of the stencil paper is sandwiched and press-engaged with the driven feed roller 10, thereby providing the same effect as in the embodiment described above. Effects can be obtained.

FIG. 6 shows still another embodiment of the original conveying device according to the present invention. In FIG. 6 as well, parts corresponding to those in FIGS. 1 to 4 are designated by the same reference numerals as those in FIGS. 1 to 4. In such an embodiment, the driven feed roller 1
The shafts 11 and 13 of the driven feed roller 10 and the drive feed roller 14 are respectively provided parallel to the gear shaft 5 for carrying in the stencil paper, that is, parallel to the axis of the plate cylinder (not shown). 14 cooperate with each other to transport the stencil paper S carried into the stencil paper storage box 1 intermittently in the same direction as the carrying direction, that is, toward the stencil paper discharge port 3.

In this embodiment as well, the drive feed roller 14 has a part of its circumference removed, and when the drive feed roller 14 is in a position facing the driven feed roller 10 at the removed circumferential portion, there is no stencil paper between the drive feed roller 14 and the driven feed roller 10. A gap is created that is large enough to accommodate the stencil paper, and when the remaining peripheral portion is in the rotational position facing the driven feed roller 10, the elastic member 15 engages the stencil paper with the driven feed roller 10 by sandwiching the stencil paper therebetween. Therefore, the elastic member 1
5 intermittently pinches and presses the stencil paper into engagement with the driving feed roller 10 as the driven feed roller 14 rotates, so it will be understood that the same effects as in the embodiments described above can be obtained.

The original conveying apparatus according to the present invention is applicable not only to stencil paper but also as a conveying apparatus for sheet-like originals such as offset printing originals.

Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited to these, and various other embodiments are possible within the scope of the present invention. This will be clear to those skilled in the art.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the original conveying device according to the present invention, FIG. 2 is a front view showing main parts of the conveying device shown in FIG. 1, and FIGS. 3 and 4 are FIG. 1 is a perspective view showing the operating state of the transport device shown in FIG. 1, FIG. 5 is a front view showing the main parts of another embodiment of the original transport device according to the present invention, and FIG. FIG. 7 is a perspective view showing still another embodiment of the original conveying device according to the invention. 1...Digital paper storage box, 2...Digital paper intake port, 3
...Memory paper discharge port, 4...Gear, 5...Shaft, 6...Rubber roller, 7...Metal roller, 8...Rubber roller, 10
...Followed feed roller, 11...shaft, 12...opening, 1
3... Shaft, 14... Driving feed roller, 15... Elastic member, 16... Gap, 17... Opening, 18... Blitz, S... Stencil paper, A... Gap.

Claims (1)

[Claims] 1. In a conveyance device that conveys used master plates removed from a plate cylinder for disposal, a driven feed roller is rotatably provided, and an elastic body is rotatably provided and rotationally driven by a drive device. and a drive feed roller made of aluminum, and when the drive feed roller has a part of its circumference removed and the removed portion is in a rotational position opposite to the driven feed roller, the original is held between the drive feed roller and the driven feed roller. When the remaining circumferential portion is in a rotating position facing the driven feed roller, the circumferential portion presses into engagement with the driven feed roller, thereby creating a space between the circumferential portion and the driven feed roller. An original conveying device characterized in that it is configured to sandwich the original paper between the two.