JPS62270968A - Digital image forming device - Google Patents

Abstract

PURPOSE:To allow only a write unit to attach detach singly to and from an image forming device without removing a reader, by making the write unit attachable and detachable in the lateral direction against a device body, pressing it from the upper part by an elastic member, and also, providing it firmly by a fastening member attached to the out-side surface of the device. CONSTITUTION:As for digital image forming device, a reader A is attached integrally and device body 50 having the contour of a as shown by a single dot chain, and a rectangular aperture 51 as shown by a single dot chain is provided on a part corresponding to the write unit B of the side face in the lateral direction. In such state, the write unit B is formed to a unit through the aperture 51, and thereafter, formed so such a structure as it can be attached and detached to and from the device body 50. A substrate 70 is pressed downward by pair of right and left holding plates 65 being elastic members to the leading part 61 of a receiving plate 60, in a position where it is contained in the device body 50, and becomes a state contacting against the receiving plate 60. In such state, a pair of right and left projecting parts 72 are fastened tightly and fixed by fastening a small screw 75, for instance, having a head part whose external diameter size is large, as a fastening member screwed to a trailing part 62, in the lateral direction.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a digital image forming apparatus in which a writing unit can be independently attached to and detached from the apparatus main body.

[Background of the invention]

Digital image forming devices can be roughly divided into a reading device that sequentially forms an optical image obtained by exposure scanning of a document surface on a line image sensor and outputs the document image as an electrical image signal, and a reading device that receives the image signal. a writing unit that scans and projects a light image using a laser beam from a semiconductor laser onto the surface of a photoreceptor to form an electrostatic latent image of the document on the photoreceptor; It is composed of each part of the image forming section that controls each image process.

Due to space limitations, each of these parts is fixed in a stacked state to form a device.
Looking at the arrangement of each part, the reading device is located at the top because it includes a document table, the image forming section is large in volume and heavy electrical equipment as is well known, and therefore occupies the bottom position, and the writing unit is located at the bottom. It is generally installed in the middle between the two.

[Problem that the invention seeks to solve]

On the other hand, since the writing unit accommodates many optical parts including a rotating polygon mirror, it is often removed from the image forming apparatus for cleaning or parts replacement.

However, in order to remove it, it is necessary to remove the reading device fixed above in advance for the reasons mentioned above, which requires a lot of effort and time.

The present invention solves this problem and improves the image forming apparatus, thereby providing a digital image forming apparatus in which only the writing unit can be independently attached to and detached from the image forming apparatus without removing the reading apparatus.

[Means for solving problems]

The above object is to provide a digital image forming apparatus that has a reading unit on the top surface and a writing unit between it and a photoconductor drum, in which the writing unit can be attached to and detached from the apparatus body in the lateral direction, and the writing unit can be attached to and removed from the apparatus body in the lateral direction, and This is achieved by a digital image forming apparatus characterized in that it is fixed by a fastening member attached to the outer surface of the apparatus.

〔Example〕

An embodiment of the invention is shown in FIGS. 1 and 2.

FIG. 2 shows the configuration of a color-type digital image forming apparatus, in which a color image is formed in the following manner.

In FIG. 2, A is a reading device, B is a writing unit,
C is an image forming section, and D is a paper feeding section.

In the reading device A, 1 is a platen glass, and a document 2 is placed on this platen glass 1. The document 2 is illuminated by fluorescent lamps 5 and 6 provided on a carriage 4 that moves on a slide rail 3. Movable mirror unit 8
mirrors 9 and 9' are provided and move on the slide rail 3, and a first mirror 7 provided on the carriage 4
In combination with this, the optical image of the document 2 on the platen glass 1 is guided to the lens reading unit 20.

The carriage 4 and the movable mirror unit 8 are driven by pulleys 11, 12, 13, 14, . Yoshi, V and 1 respectively
/2v in the same direction. platen glass 1
Standard white plates 16 and 17 are provided on the back side of both ends,
The configuration is such that a standard white signal can be obtained before the document reading scan starts and after the scan ends.

The lens reading unit) 20 includes a lens 21 as a reading lens system, a prism 22 as a light decomposition means, a first reading board 24, a red channel (hereinafter referred to as R-ch) COD 25 as a line image sensor, and a second reading board. 26. Cyan channel (hereinafter referred to as 0-ch) CO
Consists of D27. The original optical image transmitted by the first mirror 7, mirror 9, and mirror 9' is focused by the lens 21, and separated into an R-ch image and a 0-ch image by a dichroic mirror provided in the prism 22. , 1st
R-ch COD 2 provided on the reading board 24
5 and 0-ch C provided on the second reading board 26
Each of the light receiving surfaces of OD 27 is imaged.

The fluorescent lamps 5 and 6 are commercially available warm white fluorescent lamps used as light sources to prevent emphasis and attenuation of specific colors when reading color originals, and 40) G to prevent flickering.
(It is lit by a high-frequency acupuncture source of z, and is kept warm by a heater using a POSISTOR to maintain a constant temperature of the tube wall or promote warm-up.

Said R-ch OOD 25 and C-ch COD 2
The image signal output from 7 is processed through a signal processing section (not shown), and a color signal separated according to the toner color is output and input to the writing unit (H), where it is generated by a semiconductor laser. The images produced by the laser beam are sequentially projected onto the circumferential surface of the photoreceptor drum 310, and after each projection, the images are developed by developing rollers r, n, and m.
A color image is formed using color toner.

Next, the color image on the circumferential surface of the photoreceptor drum 31 is transferred to a recording paper conveyed from the paper feed section at a transfer separation pole 32, and then the recording paper is separated and ejected to the outside of the apparatus via a fixing device 33. It is now possible to finish copying a color image.

The digital image forming apparatus has a reading device A integrally attached thereto to form an apparatus main body 50 having an outline shown by a dashed line in FIG. A rectangular opening 51, also indicated by a dashed line, is provided in a portion corresponding to the writing unit B, and the writing unit B is formed into a unit through the opening 51, and can be attached to and detached from the apparatus body group. It has a structure.

That is, a deep space with the opening 51 as the frontage is provided in the portion corresponding to the writing unit)H, and the bottom surface of the space is used to guide the attaching/detaching operation of the writing unit)B and to place it in the mounting position. A fixing receiving plate 60 is fixedly provided.

The receiving plate 60 is formed by integrally forming a rising part 61 on both sides of a flat bottom part when viewed from the lateral direction, and a falling part 62 with a notch 62a in between on the front side. The portion 62 is fixed in contact with the side surface of the device main body 50.

On the other hand, a writing board 70 having a sufficient thickness and highly accurate flatness is prepared separately from the receiving plate 60, and the writing unit A laser oscillator 81 constituting B, a rotating polygon [
82, an fθ lens 83, a cylindrical lens 84, a reflecting mirror 85, and other groove forming members can be attached to the assembly.

The substrate 70 has a width that allows it to slide inscribed on the rising portion 61 of the receiving plate 60, so that when it is inserted into the opening 51, it maintains the optical axis position of the writing unit B. A pair of notches 73 provided in the substrate 70 correspond to the stop pins 6 identified in the receiving plate 60.
It is determined by the position where it touches 3.

Further, when the board 70 d is housed in the device main body 50 , it is pressed downward by a pair of left and right holding plates 65 , which are elastic members attached to the upright portion 61 of the receiving plate 60 , and is brought into close contact with the receiving plate 60 . In the state υ, a pair of left and right protrusions 72 extending downward from the front side portion 71 that shields the front surface of the upper substrate 70 is used as a fastening member to be screwed onto the lowering portion 62 of the receiving plate 60, for example. It is tightened and fixed by horizontally tightening a machine screw with a head having a large outer diameter.

That is, when the substrate 70 is fixedly attached to the receiving plate 60, the writing unit (B) installed on the substrate 70 is automatically moved to a specified relative position with respect to the image forming section C in the main body 50 of the apparatus. \, so that the light image of the original screen projected from the writing unit (B) by the cable connection with the reading device A passes through each slit hole 74 and 65 of the matched substrate 70 and receiving plate 60. The photoreceptor reaches the circumferential surface of the photoreceptor drum 31 and is formed as a static image.

Note that when the cable connection with the reader A is disconnected and the aforementioned fastening member is removed, the board 70 can be easily pulled out, and the writing unit B can be easily removed from the main body of the device for cleaning or parts replacement. This makes it possible to easily carry out tasks such as the following.

〔Effect of the invention〕

According to the present invention, the work of attaching and detaching the writing unit to the main body of the apparatus is extremely simple, and therefore a digital image forming apparatus with good performance and excellent image quality is provided, in which work such as cleaning, parts inspection, and replacement is thorough. became.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts of a digital image forming apparatus according to the present invention. FIG. 2 is a cross-sectional configuration diagram of the device. A... Reading device ++1 B...Writing unit C... Image forming section D...Paper feed section 50...Device 1 body 60-... catch plate 61... Rising part 62... Fall Yube 63 ・Stop pin 70 ・Substrate 72...Protruding part 73...Depth of cut

Claims (2)

[Claims] (1) In a digital image forming apparatus that has a reading unit on the top surface and a writing unit between it and the photoreceptor drum, the writing unit can be attached to and detached from the apparatus body in the lateral direction, and is inserted from above using an elastic member. A digital image forming apparatus characterized in that it is pressed and fixed by a fastening member attached to the outer surface of the apparatus. (2) The digital image forming apparatus according to claim 1, wherein the fastening member is a screw member that operates in a lateral direction.