JPH04117843U - Sheet material supply device - Google Patents

Abstract

(57) [Summary] [Objective] To provide a sheet material feeding device that prevents damage to sheet material. [Structure] A supply roller 30 is brought into contact with the surface of the sheet material A,
When the sheet material A is conveyed and supplied one by one in the predetermined direction X, the sheet material A is guided by the guide sheet 91 until just before the contact position P with the rotating roller 30. [Effect] The sheet material does not come into contact with the supply roller before the loading of the sheet material is completed, and damage to the sheet material can be prevented.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a sheet material supply device, and is particularly applicable to sheet materials such as originals and photosensitive materials. This is suitable for use when supplying the sheet material to a conveyance path of an image forming apparatus, for example.

0002

[Conventional technology]

An image forming device that forms images by overlapping two sheets of material. There is. For example, by overlapping an exposed photosensitive material and an image-receiving material, an image is formed on the image-receiving material. There are methods for forming images on the photosensitive material, such as overlapping the original and photosensitive material and exposing them to light. There is a method to form .

0003 In the latter method, for example, an original and a photosensitive material are superimposed on the circumferential surface of an exposure drum. The document is then exposed to light, the original is separated from the photosensitive material, and the photosensitive material is transported to the developing section. It is configured to perform development.

0004 The photosensitive material is supplied by loading the cassette containing the photosensitive material into the image forming device. the supply roller installed on the image forming apparatus, rotate it and contact it, and then press it from the top. The paper was fed into the device one by one.

[0005] Figure 3 shows an example of a conventional photosensitive material paper feed cassette (hereinafter referred to as a cassette). 2, which is a schematic cross-sectional view seen from the paper feeding direction of the photosensitive material. The cassette 1 has a plate 4 inside the cassette case 2 that is urged upward by a spring 3. The photosensitive material A is placed on the plate material 4. And the feeling The upper parts of both ends of the optical material A are prevented from being rolled up by the pressing member 5, and are prevented from being rolled up during paper feeding. Then, rotate the paper feed roller 6 shown by the imaginary line to feed one sheet at a time toward the front in the figure. We are supplying it as if it were to be released.

[0006]

[Problem that the idea aims to solve] However, the conventional cassette 1 has the following problems. That is, the size of the photosensitive material A varies widely such as A0 to A5. and When the photosensitive material A becomes large in size such as A0 or A1, the photosensitive material A becomes larger as shown in Figure 3. When A is pressed, the center part swells, and if the photosensitive material A contains moisture, the surface will rise. Irregularities may occur on the surface.

[0007] If you try to load cassette 1 into the device in this form, the loading process will be completed. The raised portion comes into contact with the paper feed roller 6 before the sheet is fully loaded. Paper feed roller 6 has surface friction Since the resistance is high, the photosensitive material A that comes into contact with it is caught by the paper feed roller 6 and rolled up. It will cause damage.

[0008] The present invention was devised in view of the above problems, and its purpose is to improve the cassette loading. To provide a sheet material feeding device that prevents sheet material from being damaged when There is a particular thing.

[0009]

[Means and actions for solving the problem]

The above object of the present invention is to supply a cassette containing sheet materials to a supply roller. Insert the sheet material into the image forming apparatus from the front, and rotate it while keeping the supply roller in contact with the sheet material. In a sheet material supply device that supplies sheet material to a conveyance path by rotating the A flexible guide sheet is suspended from the front side of the supply roller in the supply direction, and the cassette When the loading of the sheet is completed, the free end of the guide sheet is in contact with the supply roller and the sheet material. This is achieved by a sheet material supply device characterized in that it is located just in front of the contact area of the Ru.

0010 In other words, the guide system is moved to the position where the sheet material such as photosensitive material and the supply roller come into contact. By guiding the sheet material by the There is no contact with the roller, and damage to the sheet material can be prevented. Also, information The sheet material is flexible, so when loading/unloading the cassette and supplying the sheet material, please It will not be deformed or damaged.

[0011] The recording material as a sheet material in this invention can be used in any recording method. As the recording material, for example, the support described in JP-A-59-190886 is used. Contains microcapsules containing diazonium salts, couplers and bases on the body There are diazo-sensitive materials that have the genus. When exposed to light, a latent image is created depending on the original. and developed by heating.

0012

[Embodiment]

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 is a schematic configuration diagram of an image forming apparatus to which the present invention is applied, and Figure 2 is a sheet material supply device. FIG. 2 is a sectional view of a main part of a paper feed cassette 21 corresponding to FIG. The features of this embodiment are shown in Figure 2. Although the configuration of the paper feeding mechanism is shown, for convenience of explanation, we will first explain the image forming apparatus. Next, the paper feeding mechanism will be explained.

[0013] In this embodiment, a diazo copying machine is illustrated as an image forming apparatus, so the following will be explained below. It is called a copying machine. A diazo photosensitive material is housed in the paper feed cassette 21 . The copying device is In addition to carrying in and discharging, the original is used to repeatedly circulate the same original C within the device. A document transport unit 32 and an exposure unit that projects and exposes an image onto the photosensitive material A superimposed on the document C. It includes a light section 34 and a developing section 36 that heats and develops the photosensitive material A after exposure.

[0014] The document transport section 32 has a plurality of transport belts 40 lined up around the circumferential surface of a hollow guide drum 38. This belt 40 is stretched around the row, and another belt 42 is stretched across the belt 40. By rotating both belts 40 and 42, the document C is held and conveyed. Ru. A cassette 21 containing photosensitive material A is loaded below the document transport section 32. be. The photosensitive material A in the cassette 21 is aligned with the timing of the original document C being transported. The sheets are fed one by one to the stacking section 44 by the paper feed roller 30, and are stacked with the original C. I will be forgotten. The photosensitive material A superimposed on the original C is transferred to the exposure section 3 by a conveyance roller 31. 4.

[0015] The exposure section 34 includes an exposure drum 48 containing a fluorescent lamp 46, and an exposure drum 48 containing a fluorescent lamp 46. 48 and four belt support rollers 50, approximately three of the circumferential surface of the exposure drum 48 The belt 52 is wound around the /4 area. And the exposure drum 48 The belt 52 is driven to rotate so that the exposure drum 48 and the belt 52 are overlapped with each other. While conveying the original C and the photosensitive material A, the light from the exposure drum 48 The original image is projected onto the photosensitive material A to form a latent image.

[0016] The exposed photosensitive material A is separated from the original C in the peeling section 54, and then transferred to the developing section 3. 6. The developing section 36 includes a hollow cylindrical heating drum 5 equipped with a halogen lamp 56 inside. 8 and three conveyance rollers 60 that come into contact with the circumferential surface of the heating drum 58. Transportation A guide is provided between the feed rollers 60 to guide the photosensitive material A in contact with the circumferential surface of the heating drum 58. A door member 62 is provided. The photosensitive material A is transferred between the heating drum 58 and the conveying roller. 60, the latent image on the photosensitive material A is heated and developed while being held and conveyed by the photosensitive material A. Visualize. The photosensitive material A after development is discharged from the discharge port 64 and placed on the main body case. It is accumulated in a stacker 70 that has been cleared.

[0017] On the other hand, the original C separated from the photosensitive material A is discharged from the apparatus by the conveyor belt 40. or circulated along the guide drum 38 and made into copies by the same process as described above. used. The guide drum 38 covers a circumferential area from the peeling section 54 to the document loading section. Holes are dispersed between the conveyor belts, and the air inside the guide drum 38 is sucked. A fan 68 is provided. Then, the original C after peeling is placed in the negative position inside the guide drum 38. It is urged against the conveyor belt 40 by the pressure and comes into close contact with the conveyor belt 40, and the driving force is transmitted. transported.

[0018] Next, the paper feed cassette 21 will be explained with reference to FIG. A plate member 83 is provided inside the cassette case 81 and is biased upward by a spring 82. The photosensitive material A is placed on top of the photosensitive material A. In other words, Fig. 2 shows the conventional example. This is a side view of FIG. 3 shown in FIG. This corresponds to the supply roller.

[0019] What should be noted in FIG. 2 is that a guide sheet 91 is provided and that the guide sheet 91 located at the tip of the Arrow X is the paper feeding direction of the photosensitive material A, in other words, the conveyance direction, and the conveyance roller 30 Let P be the contact position between the photosensitive material A and the photosensitive material A. The upper end of the guide sheet 91 is If it is fixed to the chassis S, the lower tip is on the front side of the contact position P, and Suspended so as to be located between the photosensitive material A and the conveyance roller 30 immediately before position P has been done.

[0020] The guide sheet 91 is made of Mylar film or the like having a smooth surface and is flexible. . Since the guide sheet 91 is flexible, when the paper feed cassette 21 is removed, Damage to the guide sheet 91 can be prevented without applying excessive force to the guide sheet 91. Wear.

[0021] Therefore, if the photosensitive material A is large and has a swollen surface or is exposed to moisture, Even if there are irregularities, the guide sheet 91 guides the conveyor roller 30 smoothly and properly. is loaded into. Next, the conveying roller 30 in contact with the surface of the photosensitive material A moves in the direction of arrow Y. The photosensitive material A is fed one by one in the direction of the arrow X.

[0022] Note that when photosensitive material A is fed, the number of sheets decreases and the inclination angle gradually becomes steeper. Ru. Along with this, the contact position P moves as shown as P1, but the guide The tip position of the sheet 91 does not move, and the surface is bulged or uneven as described above. Even if the paper is moved, the paper is smoothly guided under the transport roller 30. Therefore, depending on the amount of photosensitive material A, No matter what, proper loading is performed.

[0023] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. It's not. The material of the guide sheet 91 is a thin elastic metal piece or a film-like synthetic resin. etc. can be used.

[0024]

[Effect of the idea]

According to the present invention, a supply roller is brought into contact with the surface of the sheet material, and one sheet at a time is fed in a predetermined direction. When conveying and supplying sheet materials, the system is suspended in front of the supply roller in the supply direction. The inner sheet guides the sheet material to just before the contact point with the supply roller. This prevents the sheet material from coming into contact with the supply roller before loading is complete, preventing damage to the sheet material. It can be prevented.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of an image forming apparatus showing an embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view showing the configuration of a sheet material supply device.

FIG. 3 is a sectional view showing the configuration of a conventional sheet material supply device.

[Explanation of symbols]

21 Paper cassette 30 Conveyance roller 32 Original transport section 34 Exposure section 36 Developing section 44 Overlapping part 46 Fluorescent lamp 48 Exposure drum 50 Belt support roller 81 Cassette case 82 Spring 91 Information sheet A Photosensitive material C Manuscript P, P1 contact position

Claims (1)

[Scope of utility model registration request] 1. A cassette containing sheet materials is inserted into an image forming apparatus from before the supply roller in the supply direction, and the supply roller is rotated while contacting the sheet material, thereby supplying the sheet material to a conveyance path. In the supply device,
A flexible guide sheet is suspended on the front side of the supply roller in the supply direction, and when loading of the cassette is completed, the free end of the guide sheet is positioned immediately before the contact portion between the supply roller and the sheet material. A sheet material supply device characterized by: