JPS6220295Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a stencil-making rotary copying machine that integrates a stencil-making device and a rotary copying machine.

As shown in FIG. 1, a device that integrates a conventional stencil-making device and a rotary copying machine rotates the roller 2 of the stencil-making device 1, rotates the transfer belt 3, and overlaps the stencils. Heat-sensitive stencil paper 4
During this transfer, an infrared lamp 6 is irradiated to perform plate making, and an automatic clamping mechanism (not shown) clamps the tip of the heat-sensitive stencil paper 4 with claws 7, and then The drum 8 is rotated and the heat-sensitive stencil paper 4 is placed on the screen 9.
At the same time, the separated originals are ejected by the original ejection device 10, and after the wrapping is completed, the drum 8 is continued to rotate to perform printing. However, in order to automatically perform a series of operations from plate making to printing, the rotation of the drum must be stopped until the tip of the heat-sensitive stencil paper, which is transferred by the rotation of the rollers, is gripped by the claws. This requires a roller drive mechanism that rotates the roller independently of the rotation of the drum, and an automatic clamp mechanism that clamps the tip of the transferred heat-sensitive stencil paper between claws. However, the drawbacks were that it was difficult to downsize and the cost was high.

The object of this invention is to provide a rotary stencil printing machine that can eliminate the above-mentioned drawbacks.

Embodiments of this invention will be described below based on the drawings.

In the drawing, reference numeral 11 denotes a stencil-making device, and a table 12 is provided with a transparent glass window 13, and an infrared lamp 14 and a reflecting plate 15 are attached below this glass window 13. Note that an incandescent lamp, a thermal head, or the like may be used instead of the infrared lamp 14.

Reference numeral 16 denotes a presser cover, one end of which is pivotally supported on the table 12 so as to be freely half a turn, rollers 18 and 19 on which a transfer belt 17 is wound are rotatably mounted inside the presser cover 16, and A gear 20 is attached to this roller 19 as shown in FIG. 4, and this gear 20 meshes with an intermediate gear 21.

FIG. 5 shows the transmission mechanism, M is a motor pulley, 22 is a drum pulley, 21 is an intermediate gear equipped with a clutch (not shown), and 23 is a belt, so that the rotational speed of the drum and the rotational speed of the roller 19 are the same. It is configured to be. Also presser foot cover 1
In order to separate the gear 6 from the surface of the table 12 as shown in FIG. 2, the gear 21 is moved, for example, to the position indicated by the dotted line in FIG. 4.

24 is a rotary copying machine, and the above-mentioned drum 2
5, press roller 26, and ink supply roller 2
7, an ink supply pipe 28, a squeeze roller 29, a paper ejecting claw 30, a side cover 31 for ejecting separated originals, a raw paper ejecting device 32, and a leading end portion of a heat-sensitive stencil 33 which is held between the two parts. It is composed of a claw 34 and the like as a holding member for holding the handle.

Next, the operation of this invention consisting of the above will be explained.

First, as shown in FIG.
With the stencil sheet 33 open, place the heat-sensitive stencil paper 33 on the table 12 and clamp its leading edge with the claws 34.Furthermore, place the document 35 face down on the stencil paper 33 and close the presser cover 16. keep it closed. Next, when the drum 25 is rotated at a low speed, the roller 19 rotates at the same speed as the drum 25, and the transfer belt 17 rotates at the same speed, so that the heat-sensitive stencil paper 33 and the original 35 are transferred while being in close contact with each other. During this transfer, the base paper 33 is irradiated with infrared lamp 14 and a perforation pattern is formed in the base paper 33 due to the difference in heat absorption between the ground and the printed area of the document 35, and as the drum 25 rotates, the perforation pattern is formed on the base paper 33. During this wrapping, the original 35 is separated from the base paper 33 and discharged onto the side cover 31. After winding is completed, a clutch (not shown) is released to stop the rotation of the roller 19, the infrared lamp 14 is turned off, and the drum 25 is rotated at a normal printing speed to perform printing.

Although the rotary copying machine described here is of a single-barrel type, the present invention is not limited thereto, and a two-barrel type may also be used.

As described above, this invention has a transmission mechanism equipped with a clutch that transmits the rotation of the drum of a rotary copying machine by the drive member to the roller provided on the presser cover of the stencil printing machine at the same speed, or interrupts the transmission. By engaging the clutch, the roller can be rotated at the same speed as the drum to transport the heat-sensitive stencil paper and original placed overlappingly on the table in close contact with each other, and to perform plate making during this transport; After winding the stencil-made base paper around the drum, by releasing the clutch, printing can be performed by rotating only the drum. In addition, a presser cover is provided to be able to move toward and away from the table of the stencil-making device, and a holding member is provided on the drum to hold the leading edge of the original paper that is brought into close contact with the original by the cover. After stacking and placing the base paper, the leading end of the base paper is held by a holding member and the presser cover is moved closer to the table, so that the state before the clutch is put in can be quickly and reliably set. Therefore, after the state before the clutch is engaged, a series of operations from plate making to printing can be performed automatically, and the rollers can be rotated independently of the conventional drum rotation. Since a complicated and expensive mechanism such as a roller drive device or an automatic clamp mechanism is not required, the device can be easily miniaturized and manufacturing costs can be kept low.

[Brief explanation of the drawing]

Fig. 1 is a schematic illustration of a conventional stencil-making rotary copying machine, Fig. 2 is a perspective view of an embodiment of this invention, Fig. 3 is a schematic illustration of an embodiment of this invention, and Fig. 4 shows a presser cover. FIG. 5 is an explanatory diagram of the mechanism for separating the table surface from the table surface, and FIG. 5 is a schematic diagram of the transmission mechanism. 11... stencil making device, 12... table, 1
6... Presser cover, 18, 19... Roller, 20
... Gear, 21 ... Intermediate gear, 22 ... Drum pulley, 23 ... Belt.

Claims (1)

[Scope of utility model registration request] A table on which the heat-sensitive stencil paper of the stencil plate-making device and the manuscript are placed one on top of the other is placed close to the circumferential surface of the drum of the rotary mimeograph machine, and while the original paper placed on this table and the manuscript are brought into close contact with each other, A presser cover equipped with a conveying roller is provided so as to be able to move toward and away from the table, a holding member is provided on the drum to hold a leading end of the base paper placed on the table, and a driving member is provided to rotate the drum. A stencil-making rotary copying machine, characterized in that it is provided with a transmission mechanism including a clutch that transmits the rotation of the drum by the drive member to the roller at the same speed or interrupts the transmission.