JPS63191148A - Photosensitive transfer type image forming device - Google Patents

Abstract

PURPOSE:To make it possible to automatically separate a photosensitive member from a transfer member simultaneously with their outputs by guiding both the members stuck close to each other after executing press development into a bent carrying guide. CONSTITUTION:When returning force based on the rigidity of the transfer member 6 reaches a winding angle more than the adhesive force to the photosensitive member 1 in the winding process of the transfer member 6 around a 1st guide roll 12, the member 6 is separated from the member 1, the member 6 is carried to a tray 10 and the member 1 is carried to a winding roll 11 through a 2nd guide roll 14 in accordance with respective arrows in the figure. A separation guide 13 is elastically pressed to the 1st guide roll 12 to guide the separated transfer member 6 to the tray 10 and to prevent the member 6 from being rewound around the 1st guide roll. Thus, both the members can be automatically separated simultaneously with their outputs and respectively stored in individual positions.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image forming apparatus that uses light, and more specifically, to an image forming apparatus that uses light to expose a photosensitive member coated with microcapsules containing a photosensitive material and a transfer material. Transcribed by? A mechanism for separating a photosensitive member and a transfer member that are in close contact with each other after pressure development in a photosensitive transfer type image forming apparatus that controls the transferability of 7 qualities and transfers and develops the photosensitive member onto the transfer member by stacking the photosensitive member with the transfer member and applying pressure. Regarding the structure of

[Conventional technology]

In conventional photosensitive transfer type image forming apparatuses, after pressure development, the photosensitive member and the transfer member remain in close contact with each other and are output as a set of two sheets.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional technology, it is necessary to manually separate the photosensitive member and transfer member that are in close contact with each other each time an image is output, and to discard the used photosensitive member that is no longer needed.
The problem is that it is inconvenient to handle.

The present invention is intended to solve these problems.The purpose of the present invention is to automatically separate the photosensitive member and the transfer member at the same time they are output, and store them in separate locations, thereby disposing of the used photosensitive member. An object of the present invention is to provide a photosensitive transfer type image forming apparatus that can be disposed of in bulk, has improved handling properties, and can immediately produce an output image.

[Means for solving problems]

The photosensitive transfer type image forming apparatus of the present invention transfers a photosensitive member composed of a support, microcapsules coated on the support, and a photosensitive material and a transfer material enclosed in the microcapsules after exposure. The photosensitive transfer image forming apparatus transfers and develops onto the transfer member by overlapping the photosensitive member and the transfer member and applying pressure, characterized in that the image forming apparatus is configured to guide both members that are in close contact with each other after pressure development to a bent conveyance guide. do.

〔Example〕

FIG. 1 shows the basic configuration of a photosensitive transfer type image forming apparatus using the separation mechanism of the present invention. A photosensitive member 1 coated on a support with microcapsules encapsulating a photosensitive substance and a transferable substance is wound around a supply roller 2, and is conveyed in a conveyance direction 3 by a conveyance system (not shown in the figure). , is selectively exposed to light by the optical writing head 4, and the transferability of the transfer material is controlled to form a latent image. Next, the transfer member 6 stored in the transfer member cassette 5 is sent out by the feed roller 7 at the timing when it overlaps the latent image forming portion of the photosensitive member 1, and both members overlap and are transferred to the pressure developing machine 8.
A latent image is transferred and developed on the transfer member 6 by being fed into the transfer member 6 and being pressurized.

Both members, which are pressed into close contact with each other, are separated during transportation in the order of (a), (b), and (c) by a separating mechanism 9 whose side views are shown in FIGS. 2(a) to (c). 12 is the first idle roller, which is made of an elastic material such as rubber or synthetic resin, and has a radius of 1.
It is small, about 5 mm. The transfer member 6 is
In the process of being wrapped around the guide roller 12 of the transfer member 6, when the return force due to the rigidity of the transfer member 6 reaches a wrapping angle 2 exceeding the adhesion force with the photosensitive member 1 as shown in FIG. 2(b), the transfer member 6 separates from the photosensitive member 1. The transfer member 6 is conveyed to the tray 10, and the photosensitive member 1 is conveyed to the take-up roller 11 shown in FIG. 1 through the second guide roller 14, respectively, according to the arrows in the figure.

Note that the separation guide 13 is elastically pressed against the first guide roller 12 and transfers the separated transfer member 6 to the tray 1.
0 and at the same time the first guide roller 1 of the transfer member 6
This prevents re-wrapping around 2.

The principle of the separation mechanism will be explained in detail in FIG.

When the transfer member 6 is wound around the first guide roller 12 with radius r by an angle θ, the return force F per unit area due to the rigidity of the transfer member 6 itself is determined by the material, thickness, and
It is a function of the radius of curvature r when wrapped and the winding angle θ, and can be expressed as follows.

F = -f (r, θ) Here: Coefficient depending on the material and thickness of the transfer member 6 In order for the transfer member 6 to be separated from the photosensitive member 1, the return force F per unit area must be increased by pressure development. It is sufficient that the adhesion force is greater than the adhesion force P per unit area of both members that are in close contact with each other.

According to experiments, good separation was achieved within θ=90° under the following conditions.

Transfer member = 120 μm thick high-quality paper Photosensitive member: 40 μm thick PET film First idle roller radius r: 1 cm Adhesion force per unit area P: 5 g/cn: Below Return force per unit area F: 60 g/cm (θ = 90°) The return force F per unit area increases as r becomes smaller and θ becomes larger. Therefore, the return force F per unit area increases as r becomes smaller and θ becomes larger. All you have to do is choose the radius r. Experiments have confirmed that good separation can be achieved when the roller radius is 5 cm or less. In order to ensure reliable separation, it is desirable that the return force F per unit area of the transfer member 6 and the return force per unit area of the photosensitive member 1 have the following relationship.

F≧2f FIG. 4 is a side view of another embodiment of the present invention, in which the separation guide is formed of resin or metal with good smoothness and a small coefficient of friction instead of the first guide roller 12 of FIG. A bent guide plate 15 is used.

FIG. 5 is a side view of yet another embodiment, and FIG.
The second guide roller 14 in FIG. 4 is omitted to simplify the structure.

Although the photosensitive member 1 is a roll type and the transfer member 6 is a cut sheet I type, the separation mechanism of the present invention can of course be applied to the reverse combination.

〔Effect of the invention〕

As described above, according to the present invention, a photosensitive member composed of a support, microcapsules coated on the support, and a photosensitive material and a transfer material encapsulated in the microcapsules is exposed to light. In a photosensitive transfer type image forming apparatus that later transfers and develops onto the transfer member by overlapping the photosensitive member and the transfer member and pressurizing them, the above-mentioned is Separating the photosensitive member and the transfer member by the rigidity of the member to be separated, eliminating the need to manually separate the two members that are in close contact with each other each time an image is output, and automatically separating the two members at the same time as output; By storing the used photosensitive members in separate locations, the used photosensitive members can be disposed of all at once.
This has the effect of improving handling properties and allowing immediate output images.

Furthermore, since the separation principle of the present invention utilizes the rigidity of the members to be separated, another effect is obtained in that a separation mechanism with a simple structure and low cost can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the basic configuration of a photosensitive transfer type image forming apparatus using the separation mechanism of the present invention. FIGS. 2(a), 2(b), and 2(c) are side views of the separation mechanism of the present invention. FIG. 3 is a diagram showing the principle of the separation mechanism of the present invention. FIG. 4 is a side view of a separation mechanism according to another embodiment of the present invention. FIG. 5 is a side view of a separation mechanism according to still another embodiment of the present invention. 1... Photosensitive member 2... Supply roller 3... Conveying direction 4... Optical writing head 5... Transfer member cassette 6. ... Transfer member 7 ... Delivery roller 8 ... Pressure developing machine 9 ... Separation mechanism 10 ... Tray 11 ... Take-up roller 12...First guide roller 13...
・Separation guide 14...Second guide roller 15...
・Guide plate r... Guide roller radius θ... Winding angle F... Return force per unit area P... Adhesion force per unit area or more Figure 2 Figure 2 va3 Figure 4 Figure 5

Claims (1)

[Claims] After exposing a photosensitive member composed of a support, microcapsules coated on the support, and a photosensitive material and a transfer material encapsulated in the microcapsules, the photosensitive member and the transfer member are stacked and pressed. What is claimed is: 1. A photosensitive transfer type image forming apparatus for transferring and developing onto a transfer member, characterized in that the photosensitive transfer type image forming apparatus is configured such that both members that are in close contact with each other after pressure development are guided to a bent conveyance guide.