JPH02201436A - image forming device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image forming apparatus, and in particular, it is possible to easily adjust the optical axis of a condensing lens located between an exposure table and a light source. The present invention relates to an image forming apparatus configured as described above.

[Conventional technology]

Generally, an image forming apparatus includes a light condensing lens between an exposure table and a light source. As shown in FIG. 4, the condensing lens 51 is mounted between the exposure table and the light source and supported by a plate 52, and when adjusting the optical axis 53 of the condensing lens 51, Loosen the four screws 55 that fix the condensing lens 51, and insert a screwdriver 57 or the like between the condensing lens 51 and the mounting plate 52, as shown in FIG. Adjustments were made by prying up the condensing lens 51 and moving it in the vertical direction X by the length of the elongated hole 58, or by changing the inclination θ by the width.

[Problem to be solved by the invention]

However, in the method of attaching the condensing lens 51 described above, there is a difficulty in adjusting the optical axis 53. For example, the optical axis 53
After adjusting the inclination θ, the focusing lens 51 is moved in the vertical direction
If the optical axis 53 is moved to 2 or 3, the inclination θ made in the previous step will be shifted, and this will have to be readjusted, and this will have to be repeated 2 or 3 times, making adjustment of the optical axis 53 extremely troublesome. There is a problem with becoming.

Therefore, the present invention solves the problems of the above-mentioned conventional technology and provides an image forming apparatus that makes it possible to easily adjust the optical axis of the condensing lens. do.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an image forming apparatus in which a condensing lens is fixed to a mounting plate fixed between an exposure table and a light source so that the optical axis can be adjusted.
The above-mentioned mounting is performed by fixing a vertically movable plate on the plate so that it can freely move up and down so that the vertical direction of the optical axis can be adjusted, and fixing the condensing lens on this vertically movable plate so that the inclination of the optical axis can be adjusted. It is characterized by this.

[Effect]

According to the present invention, when adjusting the optical axis of the condensing lens, first, the inclination of the optical axis is adjusted by rotating the condensing lens with respect to the vertically movable plate, and then the condensing lens is adjusted. It is fixed to a vertically movable plate, and then the vertically movable plate is moved up and down to adjust the vertical direction of the optical axis, and then the vertically movable plate is fixed to the plate. According to this, the vertical direction of the optical axis can be adjusted while maintaining the adjusted inclination of the optical axis, and the adjustment becomes extremely simple.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an image forming apparatus according to the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 indicates the main body of the copying machine. At the top of the copying machine main body 1, a document table glass 2 on which a document can be placed, and a cover 3 that covers the document table glass 2 in an openable and closable manner are disposed so as to be movable left and right. Below the original platen glass 2 is a halogen lamp 4 that extends in a direction perpendicular to the moving direction of the original platen glass 2 and irradiates light onto the original on the original platen glass 2. A light source 6 consisting of a reflecting mirror body 5 that reflects toward 2 is provided. When the document table glass 2 is moved from side to side while the light source 6 is emitting light, the entire document is irradiated with light.

Further, an exposure table 7 is disposed in the center of the interior of the copying machine body 1, and between this exposure table 7 and the light source 6, a filter 8 for adjusting the color tone of the copied image and a light collecting device are provided. The lens 9 is mounted and supported by a plate 10, and between the lens 9 and the exposure table 7, a pair of reflection mirrors 11 for adjusting the optical path length and focus are mounted and supported by a plate 12 so that the position can be adjusted. ing. The light that is reflected from the original after being irradiated onto the original passes through a filter 8, a lens 9, and each reflecting mirror 11.
and is guided to the exposure table 7.

Furthermore, a cartridge 14 is provided in the upper part of the interior of the copying machine main body 1.
A cassette 28 for storing the cassette 28 is removably housed, and a take-up roller 15 is rotatably supported. This cartridge 14 is wound with a long photosensitive and pressure sensitive recording medium carrying a large number of microcapsules containing dye for color m-photography, that is, a long microcapsule paper 13.

This microcapsule paper 13 is pulled out from the cartridge 14 by rotation of a plurality of feed rollers 16, and then wound up by a take-up roller 15.

During this time, a portion of the microcapsule paper 13 that has passed under the exposure table 7 is exposed to light, and a latent image of the original is formed there.

Below the exposure table 7, a developer paper cassette 18 containing a sheet of color developer paper 17 having a certain size is freely installed in the copying machine main body 1.
A pressure developing device 19 is disposed between the winding roller 15 and the winding roller 15 . Here, the exposed portion of the microcapsule paper 13 and the color developer paper 17 are brought into pressure contact, whereby a color image based on the latent image on the microcapsule paper 13 is formed on the color developer paper 17. The color developer paper 17 is made by coating a color developer on a base material and forming a heat-melting surface resin layer on the color developer.The base materials are paper with a small heat capacity and PET (with a high heat capacity). polyethylene terephthanol), etc. Further, the color developer paper cassette 18 is provided with a protrusion 18a for determining the size of the color developer paper 17, and this protrusion 18a is provided in the main body 1.
A determining device 20 is provided which determines the size of the color developing paper 17 by determining the size of the color developing paper 8a.

A plurality of feed rollers 21 and paper guides 25 are provided between the developer paper cassette 18 and the pressure developing device 19 for transporting the developer paper 17 toward the pressure developing device 19. A peeling roller 22 for peeling the developing paper 17 from the microcapsule paper 13 is provided on the side. A sheet heating device 23 for fixing the image formed on the developer paper 17 by heat is disposed on the paper feeding side of the peeling roller 22, and the developer paper 17 discharged from the sheet heating device 23 is placed on a tray 24. be accommodated.

When making a color copy using this copying machine, when the start button (not shown) is operated, the document table glass 2 is moved to the right edge, and the left edge of the document is placed opposite the halogen lamp 4 of the light source 6. , the halogen lamp 4 is turned on, and in this state the document table glass 2 is moved back to the left,
Irradiation of light onto the original ends.

During this light irradiation, the microcapsule paper 13 is moved toward the winding side on the exposure table 7 at the same speed as the document table glass 2. Therefore, a latent image of the original is formed on the microcapsule paper 13 by the reflected light from the original. The developer paper 17 is transferred from the developer paper cassette 18 toward the pressure developing device 19 in synchronization with the return movement of the document table glass 2 to the left.
When the exposed portion of the microcapsule paper 13 is pressed against the color developer paper 17, a color image is formed on the color developer paper 17.

Thereafter, the color developing paper 17 is introduced into a sheet heating device 23 by a feed roller 16 or the like, and the image is fixed by the heat inside this device 23 and then discharged.

In the copying machine configured as described above, according to this embodiment, the condensing lens 9 is mounted on the back side of the plate 10, as shown in FIGS. It is freely arranged. A center bin 33 is fixed to the center of the vertically movable plate 31, and the center bin 33 is mounted through a center hole 35 of the plate 10, and the receiver of the condensing lens 9 is rotatably fitted into the hole 36. ing. Further, four circular projections 38, which are slightly thicker than the thickness of the mounting plate 10, are formed at the corners of the vertically movable plate 31, and a female screw hole 39 is formed in the center of the circular projections 38.

This circular protrusion 38 is installed in alignment with the hole 40 of the plate 10, however, the diameter of the hole 40 is considerably larger than the diameter of the circular protrusion 38, and the female threaded hole 39 at the center of the circular protrusion 38 located at the width of this hole 40 is A screw 41 that fixes the condensing lens 9 is screwed together.

Further, the vertically movable plate 31 has a pair of fixing pins 4 at the top and bottom.
3 is fixed, and this fixed pin 43 is aligned with the elongated hole 45 of the plate 10, so that the vertically movable plate 31 and the attached plate 1 are aligned with each other.
0 allows relative movement only in the longitudinal direction of the elongated hole 45. Furthermore, a pair of female screw holes 46 are formed on the top and bottom of the vertically movable plate 31, and the long holes 47 of the plate 10 are aligned with the female screw holes 46, and the long holes 47 are inserted into the female screw holes 46. A fixing screw 48 is screwed together.

In this embodiment, in order to adjust the optical axis 49 of the condensing lens 9, first, the four screws 41 are tightened to adjust the inclination θ of the optical axis 49. Since the lens 9 and the vertically movable plate 31 are aligned by the center bin 33, this adjustment is extremely easy. Next, the four screws 41 are tightened to integrate the condensing lens 9 and the vertically movable plate 31, and then the vertical direction X of the optical axis 49 is adjusted.

This adjustment is performed by vertically moving the vertically movable plate 31 and the mounting plate 10 relative to each other by the length of the elongated hole 45. When this is completed, the fixing screw 48 is tightened to fix the three parts together.

In addition, in the upper corner of the vertically movable plate 31, there is a square hole 70 for inserting a screwdriver or the like to adjust the vertical position after the vertically movable plate 31 is temporarily attached to the plate 10.
This square hole 70 is located so as to protrude above the cutout shoulder 10a of the mounting plate 10. Furthermore, for installation, an engaging portion 71 is formed at the center of the left end of the plate 10 in FIG.
This engaging portion 71 inserts the vertically movable plate 31 and loosely presses it.

According to this embodiment, after adjusting the inclination θ of the optical axis 49,
The condensing lens 9 is fixed to the vertically movable plate 31, and after the vertically movable plate 31 is moved to adjust the vertical direction X of the optical axis 49, the vertically movable plate 31 is fixed to the plate 10 for mounting. Therefore, the vertical direction X of the optical axis 49 can be adjusted while maintaining the adjusted inclination θ of the optical axis 49. For example, when adjusting the vertical direction The inclination θ of the shaft 49 does not deviate, and its adjustment can be performed extremely easily.

〔Effect of the invention〕

As is clear from the above description, according to the present invention,
- A vertically movable plate is mounted on the J-board as a clay pipe so that it can move vertically, and the condensing lens is fixed on this vertically movable plate so that the inclination of the optical axis can be adjusted, so when adjusting the optical axis of the condensing lens. , adjust the inclination of the optical axis by 1, then fix the condensing lens to the vertically movable plate, then move the vertically movable plate up and down to adjust the vertical direction of the optical axis, and then attach the vertically movable plate. can be fixed to the board, so
The vertical direction of the optical axis can be adjusted while maintaining the adjusted inclination of the optical axis, and the adjustment can be performed extremely easily.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of an image forming apparatus according to the present invention, FIG. 2 is an exploded perspective view showing a plate for lens mounting, FIG. 3 is a sectional view showing a plate for lens mounting, and FIG. The figure is a perspective view showing a plate for conventional lens mounting, and FIG. 5 is a sectional view showing a plate for lens mounting. 1... Copying machine main body, 9... Condensing lens, 1o...
・Mounting is by plate, 31... Vertical movement plate, 33... Center bottle, 38... Circular protrusion, 41... Screw, 43.
...fixing pin, 45...long hole, 48...fixing screw,
49...Optical axis. Applicant's representative: Yasushi Ishikawa, 23rd year of 1989

Claims (1)

[Claims] In an image forming apparatus in which a condensing lens is fixed to a mounting plate fixed between an exposure table and a light source so that the optical axis can be adjusted, the mounting plate can adjust the vertical direction of the optical axis. An image forming apparatus characterized in that a vertically movable plate is fixedly movable vertically, and the condensing lens is fixedly fixed to the vertically movable plate so that the inclination of the optical axis can be adjusted.