JP2853448B2 - Image transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image transfer apparatus excellent in workability. More specifically, the present invention relates to an image transfer device provided with a tiltable tray on an impression cylinder side or a transfer cylinder side on which an image receptor or an image forming material is placed.

[0002]

2. Description of the Related Art Recently, an image-forming material having a photosensitive layer coated on one side of a support is image-exposed, and then the image formed on the photosensitive layer is heated, generally at about 100.degree. Monochromatic or multicolor prepress proofs suitable for proof printing or the like transferred to an image receptor such as paper have been produced. The image forming material includes a support, a photosensitive layer formed on one surface of the support, and a protective film. As the support and the protective film, a thin film or sheet made of a material such as cellulose acetate, polystyrene, polyvinyl chloride, or polyethylene terephthalate is used. As the image receiver, a printing material selected as appropriate, such as paper or film, is employed.

As an apparatus for producing the above-mentioned prepress proof or the like, an impression cylinder having an image forming material attached thereto and a transfer cylinder having an image receptor attached thereto are arranged such that a photosensitive layer of the image forming material and the image receptor are opposed to each other. In general, an apparatus has been proposed in which an image formed on a photosensitive layer is transferred to an image receptor in a nip between the two cylinders by contacting and pressing the cylinders. To produce a multicolor print or prepress proof, a color original is color-separated to produce image-exposed image forming materials of each color, for example, yellow, magenta, cyan and black, and then these image forming materials are sequentially formed. The image formed on the photosensitive layer of the material will be transferred to the image receptor.

For this reason, when preparing a multicolor prepress proof or the like, several image forming materials are used for the same image receptor. For this reason, in order to facilitate attachment and detachment operations of the image receptor and the image forming material,
The applicant of the present invention has proposed an image transfer apparatus provided with an image receiver or a tray for mounting image forming material that can be freely tilted on the impression cylinder side or the transfer cylinder side (Japanese Patent Application Nos. Hei 3-206516 and Hei 3-206). 206517). As a result of further study after that, in order to check the attachment state of the image receptor such as paper, or to check the finished state of the printed matter, in the tray inclined to the impression cylinder side or the transfer cylinder side supported by the fulcrum, We found that printed materials were hidden behind the tray, making it difficult to confirm. Also, part of the tray can be folded freely,
When the checking range is widened, the tray opens and closes due to vibration, which not only has poor workability but also has a problem in terms of safety.

[0005]

The present invention makes it easy to attach an image receptor or an image forming material to an impression cylinder or a transfer cylinder,
In addition, it has been strongly desired to develop a device that can easily check the state of attachment of an image receptor and the like and the finished condition of a printed matter and that has no problem in safety. It was not yet developed.

[0006]

SUMMARY OF THE INVENTION The present invention comprises an impression cylinder having an image forming material attached thereto and a transfer cylinder having an image receptor attached thereto, and the image forming material and image receptor are rotated by rotating the impression cylinder and the transfer cylinder. For transferring an image formed on the photosensitive layer of the forming material to an image receiving member by introducing the toner into a nip between the impression cylinder and the transfer cylinder, the apparatus comprising: A support plate having a fulcrum centered on a fulcrum, the tip end of which can approach the impression cylinder side or the transfer cylinder side; and a support plate having the fulcrum on the support plate; The present invention provides an image transfer device having a mounting plate of an image forming material or an image receptor sliding on a side. Further, in the present invention, the slide member, a rail installed near the center or both sides of the support plate,
A sliding member installed on a mounting plate that slides on the rail,
An image transfer device comprising: a sliding stop member for the sliding member.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic sectional view of an image transfer apparatus used in the present invention, FIGS. 2 and 3 are explanatory views of a tray according to the present invention, and FIG. 4 is an explanatory view of a slide member.

Hereinafter, the configuration of the image transfer apparatus used in the present invention will be described with reference to FIG. The image receiving material (not shown) attached to the surface of the transfer cylinder 1 and the image-exposed image forming material attached to the surface of the impression cylinder 2 are exposed to light by rotating the transfer cylinder and the impression cylinder in the direction of the arrow. The image formed on the functional layer is pressed against an image receptor, and the image is transferred to the image receptor. A tray 3 is provided above an intermediate portion between the transfer cylinder and the impression cylinder. The tray 3 is inclined about the fulcrum 4 toward the transfer cylinder and the impression cylinder. The tray functions as a mounting table for the image receiving material and the image forming material, and is useful as an auxiliary device when the image receiving material and the forming material are attached to the transfer cylinder and the impression cylinder.

FIGS. 2 and 3 show a tray according to the present invention. The mounting plate 6 on the support plate 5 is slidably mounted on the support plate via a slide member. FIG. 2 shows the mounting plate 6
FIG. 3 shows a state in which the mounting plate 6 has slid to the transfer cylinder side. As shown in FIG. 4, the slide member includes rails 7 provided on both side surfaces of the support plate 5,
The sliding member 8 includes sliding members 8 provided on both side surfaces of the mounting plate 6 fitted to the rail, and a sliding stop member 9 provided at an end of the sliding member 8. The slide member may be provided at the center of the support plate 5. When the sliding member 8 slides on the rail, the mounting plate 6 is movable to both the impression cylinder side and the transfer cylinder side. The sliding stop member 9 of the sliding member 8 is installed so that the stop of the mounting plate 6 at the movement end point can be secured. In this example, as shown in FIGS. 2 and 3, a magnet was provided at a longitudinal end point of the sliding member 8. The magnet is attracted to the rail, so that the mounting plate 6 at the end point of the movement is moved.
Ensure sliding stop.

The operation of the tray of the present invention will be described below. Usually, in the state shown in FIG. 2, the tray is inclined to the transfer cylinder side or the impression cylinder side, and the work of attaching and detaching the image receptor or the image forming material is performed. When examining the mounting state of the image receptor on the transfer cylinder or the quality of the printed matter, the placing plate 6 is moved to the state shown in FIG. As a result, the work space can be widened, and it becomes easy to check the printing state or trouble check and fix the trouble when the image receptor is attached.

[0011]

According to the present invention, there is provided an image transfer device with a tray which allows easy attachment and detachment of an image receptor and an image forming material, and which can easily confirm the quality of a printed material.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of an image transfer device.

FIG. 2 is a schematic sectional view of a tray.

FIG. 3 is a schematic sectional view of a tray.

FIG. 4 is a perspective view of a tray.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 transfer cylinder 2 impression cylinder 3 tray 5 support plate 6 mounting plate 7 rail 8 sliding member

Claims (2)

(57) [Claims] 1. An image forming apparatus comprising: an impression cylinder having an image forming material attached thereto; and a transfer cylinder having an image receptor attached thereto. The image forming material and the image receiving member are moved between the impression cylinder and the transfer cylinder by rotating the impression cylinder and the transfer cylinder. An image transfer device for transferring an image formed on the photosensitive layer of the forming material to an image receiver by introducing the image formed on the photosensitive layer of the forming material into an intermediate nip. Has a tray that can approach the impression cylinder side or the transfer cylinder side, the tray has a support plate having a fulcrum, and an image forming material that slides on the support plate to the impression cylinder side and the transfer cylinder side via a slide member or An image transfer device comprising a mounting plate for an image receptor. 2. A sliding member, comprising: a rail provided near or on both sides of a support plate or a central portion; a sliding member provided on a mounting plate sliding on the rail; An image transfer device comprising: